doc_id
string
doi
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title
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abstract
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19465462
10.1098/RSBL.2009.0934
19,465,462
Building a home from foam—túngara frog foam nest architecture and three-phase construction process
Frogs that build foam nests floating on water face the problems of over-dispersion of the secretions used and eggs being dangerously exposed at the foam : air interface. Nest construction behaviour of túngara frogs, Engystomops pustulosus, has features that may circumvent these problems. Pairs build nests in periodic b...
1
Biology Letters
25064782
10.1073/PNAS.0912477107
25,064,782
A nocturnal mammal, the greater mouse-eared bat, calibrates a magnetic compass by the sun
Recent evidence suggests that bats can detect the geomagnetic field, but the way in which this is used by them for navigation to a home roost remains unresolved. The geomagnetic field may be used by animals both to indicate direction and to locate position. In birds, directional information appears to be derived from a...
1
Proceedings of the National Academy of Sciences of the United States of America
11048132
10.1242/JEB.042937
11,048,132
Polarization sensitivity in two species of cuttlefish – Sepia plangon (Gray 1849) and Sepia mestus (Gray 1849) – demonstrated with polarized optomotor stimuli
The existence of polarization sensitivity (PS), most likely resulting from the orthogonal arrangement of microvilli in photoreceptors, has been proposed in cephalopods for some time, although it has rarely been examined behaviourally. Here, we tested the mourning cuttlefish, Sepia plangon, and the reaper cuttlefish, Se...
1
The Journal of Experimental Biology
205309753
10.1038/NCOMMS1373
205,309,753
Identification and characterization of a multidomain hyperthermophilic cellulase from an archaeal enrichment.
Despite extensive studies on microbial and enzymatic lignocellulose degradation, relatively few Archaea are known to deconstruct crystalline cellulose. Here we describe a consortium of three hyperthermophilic archaea enriched from a continental geothermal source by growth at 90 °C on crystalline cellulose, representing...
1
Nature Communications
86005229
10.1111/J.1529-8817.2010.00828.X
86,005,229
DIFFERENCES IN POLYSACCHARIDE STRUCTURE BETWEEN CALCIFIED AND UNCALCIFIED SEGMENTS IN THE CORALLINE CALLIARTHRON CHEILOSPORIOIDES (CORALLINALES, RHODOPHYTA) 1
The articulated coralline Calliarthron cheilosporioides Manza produces segmented fronds composed of calcified segments (intergenicula) separated by uncalcified joints (genicula), which allow fronds to bend and reorient under breaking waves in the wave‐swept intertidal zone. Genicula are formed when calcified cells deca...
1
Journal of Phycology
5756713
10.1098/RSPB.2008.1939
5,756,713
Foam nest components of the túngara frog: a cocktail of proteins conferring physical and biological resilience
The foam nests of the túngara frog (Engystomops pustulosus) form a biocompatible incubation medium for eggs and sperm while resisting considerable environmental and microbiological assault. We have shown that much of this behaviour can be attributed to a cocktail of six proteins, designated ranaspumins (Rsn-1 to Rsn-6)...
1
Proceedings of The Royal Society B: Biological Sciences
86310158
10.1016/J.ASD.2005.02.002
86,310,158
The suctorial organ of the Solifugae (Arachnida, Solifugae)
The ability of members of the arachnid order Solifugae to climb smooth, vertical surfaces and the organs involved in this behavior are investigated. Macroscopic, microscopic, and scanning electron microscopic observations are made of a palpal organ called the suctorial organ. Observations of the behavior but not the mi...
1
Arthropod Structure & Development
41678349
10.1086/323990
41,678,349
On the Mound of Macrotermes michaelseni as an Organ of Respiratory Gas Exchange
Patterns and rates of air movements in the mounds and nests of Macrotermes michaelseni were studied using tracer methods. Wind is a significant source of energy for powering nest ventilation, despite the mound being a completely enclosed structure. Nests are ventilated by a tidal movement of air driven by temporal vari...
1
Physiological and Biochemical Zoology
1177498
10.1242/JEB.056549
1,177,498
The diversity of hydrostatic skeletons
A remarkably diverse group of organisms rely on a hydrostatic skeleton for support, movement, muscular antagonism and the amplification of the force and displacement of muscle contraction. In hydrostatic skeletons, force is transmitted not through rigid skeletal elements but instead by internal pressure. Functioning of...
1
The Journal of Experimental Biology
84549146
10.1017/S0025315400033440
84,549,146
On the buoyancy of the pearly nautilus
Nautilus macromphalus Sowerby when freshly caught was close to neutral buoyancy having a weight in sea water of about 0–2% of its weight in air. The animals without their shells varied considerably in density but the volume of the shell was an approximately constant fraction of the total volume of the whole animal and ...
1
Journal of the Marine Biological Association of the United Kingdom
20480309
10.3732/AJB.93.6.829
20,480,309
How strong is intracanopy leaf plasticity in temperate deciduous trees?
Intracanopy plasticity in tree leaf form is a major determinant of whole-plant function and potentially of forest understory ecology. However, there exists little systematic information for the full extent of intracanopy plasticity, whether it is linked with height and exposure, or its variation across species. For arb...
1
American Journal of Botany
207600151
10.3732/AJB.93.9.1251
207,600,151
A biomechanical perspective on the role of large stem volume and high water content in baobab trees (Adansonia spp.; Bombacaceae).
The stems of large trees serve in transport, storage, and support; however, the degree to which these roles are reflected in their morphology is not always apparent. The large, water-filled stems of baobab trees (Adansonia spp.) are generally assumed to serve a water storage function, yet recent studies indicate limite...
1
American Journal of Botany
11980169
10.2307/3558444
11,980,169
Hydrophobic trichome layers and epicuticular wax powders in Bromeliaceae.
The distinctive foliar trichome of Bromeliaceae has promoted the evolution of an epiphytic habit in certain taxa by allowing the shoot to assume a significant role in the uptake of water and mineral nutrients. Despite the profound ecophysiological and taxonomic importance of this epidermal structure, the functions of n...
1
American Journal of Botany
22971319
10.1111/ELE.12039
22,971,319
The incidence and implications of clouds for cloud forest plant water relations.
Although clouds are the most recognisable and defining feature of tropical montane cloud forests, little research has focussed on how clouds affect plant functioning. We used satellite and ground-based observations to study cloud and leaf wetting patterns in contrasting tropical montane and pre-montane cloud forests. W...
1
Ecology Letters
21403217
10.1007/S00435-007-0031-7
21,403,217
Functional morphology of scale hinges used to transport water: convergent drinking adaptations in desert lizards (Moloch horridus and Phrynosoma cornutum)
The Australian thorny devil, Moloch horridus Gray, 1841, and the Texas horned lizard, Phrynosoma cornutum Harlan, 1825, have the remarkable ability to rapidly move water through interscalar spaces on their skin’s surface to their mouth for drinking. The morphology of these scale hinges has not been studied. We used his...
1
Zoomorphology
37979200
10.1007/BF00204333
37,979,200
Function of spiral grain in trees
SummaryThrough spiral grain, conduits for sap lead from each root to all branches. This uniform distribution of sap is indicated by the paths of vessels and tracheids, and has been proven experimentally by means of dyed sap injected into the base of stems or taken up by roots. Trees receiving water only from roots at o...
1
Trees-structure and Function
84985598
10.1126/SCIENCE.1059567
84,985,598
Bacterial Recognition of Mineral Surfaces: Nanoscale Interactions Between Shewanella and α-FeOOH
Force microscopy has been used to quantitatively measure the infinitesimal forces that characterize interactions betweenShewanella oneidensis (a dissimilatory metal-reducing bacterium) and goethite (α-FeOOH), both commonly found in Earth near-surface environments. Force measurements with subnanonewton resolution were m...
1
Science
205322669
10.1038/NCOMMS4166
205,322,669
Overcoming the brittleness of glass through bio-inspiration and micro-architecture.
Highly mineralized natural materials such as teeth or mollusk shells boast unusual combinations of stiffness, strength and toughness currently unmatched by engineering materials. While high mineral contents provide stiffness and hardness, these materials also contain weaker interfaces with intricate architectures, whic...
1
Nature Communications
312009
10.1242/JEB.01831
312,009
Extreme impact and cavitation forces of a biological hammer: strike forces of the peacock mantis shrimp Odontodactylus scyllarus
Mantis shrimp are renowned for their unusual method of breaking shells with brief, powerful strikes of their raptorial appendages. Due to the extreme speeds of these strikes underwater, cavitation occurs between their appendages and hard-shelled prey. Here we examine the magnitude and relative contribution of the impac...
1
The Journal of Experimental Biology
86706458
10.3159/09-RA-024.1
86,706,458
Characterization of cork warts and aerenchyma in leaves of Rhizophora mangle and Rhizophora racemosa
Mangroves are a diverse group of plants that inhabit tidal zones in the tropics and sub-tropics. Some mangrove species occupy the lower tidal zone in which the substrate is anoxic for long time periods while some mangroves inhabit the upper tidal zone in which the substrate should be less anoxic. Recent research has sh...
1
Journal of The Torrey Botanical Society
36679137
10.1021/LA203853R
36,679,137
Analysis of preload-dependent reversible mechanical interlocking using beetle-inspired wing locking device.
We report an analysis of preload-dependent reversible interlocking between regularly arrayed, high aspect ratio (AR) polymer micro- and nanofibers. Such a reversible interlocking is inspired from the wing-locking device of a beetle where densely populated microhairs (termed microtrichia) on the cuticular surface form n...
1
Langmuir
87200304
10.2307/1565146
87,200,304
Cutaneous Water Acquisition by the Thorny Devil (Moloch horridus: Agamidae)
The skin of the thorny devil readily absorbs water, like "blotting-paper." The volume of water held in the cutaneous capillary system is about 3.7% of the body mass. Water is conveyed to the mouth by the cutaneous capillary system, where it is imbibed. The low permeability of the skin to evaporative water loss and lack...
1
Journal of Herpetology
28331494
10.1007/S11160-009-9155-9
28,331,494
The biology and ecology of the ocean sunfish Mola mola: a review of current knowledge and future research perspectives
Relatively little is known about the biology and ecology of the world’s largest (heaviest) bony fish, the ocean sunfish Mola mola, despite its worldwide occurrence in temperate and tropical seas. Studies are now emerging that require many common perceptions about sunfish behaviour and ecology to be re-examined. Indeed,...
1
Reviews in Fish Biology and Fisheries
4358030
10.1038/421495A
4,358,030
Neurophysiology: Sensing temperature without ion channels
Mammals use cold-sensitive ion channels to translate information about the temperature of their surroundings into electrical signals that are taken up by thermoreceptor nerve cells. Here I investigate the thermoelectric properties of an extracellular gel removed from the electrosensors of sharks, and show that it devel...
1
Nature
14255720
10.1242/JEB.001578
14,255,720
Death by small forces: a fracture and fatigue analysis of wave-swept macroalgae
Wave-swept macroalgae are subjected to large hydrodynamic forces as each wave breaks on shore, loads that are repeated thousands of times per day. Previous studies have shown that macroalgae can easily withstand isolated impositions of maximal field forces. Nonetheless, macroalgae break frequently. Here we investigate ...
1
The Journal of Experimental Biology
16076053
10.1016/J.CEB.2007.12.003
16,076,053
Microtubule assembly dynamics: new insights at the nanoscale.
Although the dynamic self-assembly behavior of microtubule ends has been well characterized at the spatial resolution of light microscopy (~200 nm), the single-molecule events that lead to these dynamics are less clear. Recently, a number of in vitro studies used novel approaches combining laser tweezers, microfabricat...
1
Current Opinion in Cell Biology
1129520
10.1098/RSPB.2011.1169
1,129,520
A poisonous surprise under the coat of the African crested rat
Plant toxins are sequestered by many animals and the toxicity is frequently advertised by aposematic displays to deter potential predators. Such ‘unpalatability by appropriation’ is common in many invertebrate groups and also found in a few vertebrate groups. However, potentially lethal toxicity by acquisition has so f...
1
Proceedings of The Royal Society B: Biological Sciences
73560794
10.3354/AME015233
73,560,794
Chemical mediation of bacterial surface colonisation by secondary metabolites from the red alga Delisea pulchra
We investigated the effects of halogenated furanones from the red alga Delisea pulchra on colonisation of surfaces by marine bacteria. Bacterial abundance on the surface of D. pulchra, assessed using scanning electron microscopy (SEM), was significantly lower than on the surfaces of 3 co-occurring algal species, all of...
1
Aquatic Microbial Ecology
29789667
10.1007/S007920050010
29,789,667
Pyrolobus fumarii, gen. and sp. nov., represents a novel group of archaea, extending the upper temperature limit for life to 113°C
A novel, irregular, coccoid-shaped archaeum was isolated from a hydrothermally heated black smoker wall at the TAG site at the Mid Atlantic Ridge (depth 3650 meters). It grew at between 90°C and 113°C (optimum 106°C) and pH 4.0–6.5 (optimum 5.5) and 1%–4% salt (optimum 1.7%). The organism was a facultatively aerobic ob...
1
Extremophiles
206519310
10.1126/SCIENCE.1172488
206,519,310
Deep-Sea, Swimming Worms with Luminescent “Bombs”
Several species of deep-sea polychaete worms have been discovered that have a bizarre predator distraction mechanism. By using remotely operated vehicles, we found seven previously unknown species of swimming annelid worms below 1800 meters. Specimens were large and bore a variety of elaborate head appendages. In addit...
1
Science
30390023
10.1016/J.JBIOMECH.2011.12.003
30,390,023
Elastic modulus of hard tissues.
This work aims at evaluating the elastic modulus of hard biological tissues by considering their staggered platelet micro-structure. An analytical expression for the effective modulus along the stagger direction is formulated using three non-dimensional structural variables. Structures with a single staggered hierarchy...
1
Journal of Biomechanics
5030412
10.3732/AJB.94.7.1061
5,030,412
Do epidermal lens cells facilitate the absorptance of diffuse light?
Many understory plants rely on diffuse light for photosynthesis because direct light is usually scattered by upper canopy layers before it strikes the forest floor. There is a considerable gap in the literature concerning the interaction of direct and diffuse light with leaves. Some understory plants have well-develope...
1
American Journal of Botany
5015087
10.1046/J.1365-3040.2003.00846.X
5,015,087
Long-distance transport of gases in plants: a perspective on internal aeration and radial oxygen loss from roots
Internal transport of gases is crucial for vascular plants inhabiting aquatic, wetland or flood-prone environments. Diffusivity of gases in water is approximately 10 000 times slower than in air; thus direct exchange of gases between submerged tissues and the environment is strongly impeded. Aerenchyma provides a low-r...
1
Plant Cell and Environment
3218760
10.1242/JEB.020479
3,218,760
To bend a coralline: effect of joint morphology on flexibility and stress amplification in an articulated calcified seaweed
Previous studies have demonstrated that fleshy seaweeds resist wave-induced drag forces in part by being flexible. Flexibility allows fronds to `go with the flow', reconfiguring into streamlined shapes and reducing frond area projected into flow. This paradigm extends even to articulated coralline algae, which produce ...
1
The Journal of Experimental Biology
205079284
10.1038/503345A
205,079,284
Plant biomechanics: High-endurance algae
Breaking waves place repeated loading on marine algae, which can lead to death by fatigue. But observations of one alga suggest that its joint structure, which lacks transverse connections, confers fatigue resistance.
1
Nature
319884
10.1242/JEB.003509
319,884
Electrical and behavioral courtship displays in the mormyrid fish Brienomyrus brachyistius
Mormyrid electric fish rely on the waveform of their electric organ discharges (EODs) for communicating species, sex, and social status, while they use the sequences of pulse intervals (SPIs) for communicating rapidly changing behavioral states and motivation. Little is known of electric signaling during courtship beha...
1
The Journal of Experimental Biology
26018077
10.3732/AJB.94.8.1371
26,018,077
Aerodynamics of saccate pollen and its implications for wind pollination.
Pollen grains of many wind-pollinated plants contain 1-3 air-filled bladders, or sacci. Sacci are thought to help orient the pollen grain in the pollination droplet. Sacci also increase surface area of the pollen grain, yet add minimal mass, thereby increasing dispersal distance; however, this aerodynamic hypothesis ha...
1
American Journal of Botany
2431492
10.1016/J.BIOORG.2006.08.001
2,431,492
Characterization of two new multiforms of Trametes pubescens laccase.
Electrochemical properties of two multiforms of laccase from Trametes pubescens basidiomycete (LAC1 and LAC2) have been studied. The standard redox potentials of the T1 sites of the enzymes were found to be 746 and 738 mV vs. NHE for LAC1 and LAC2, respectively. Bioelectroreduction of oxygen based on direct electron tr...
1
Bioorganic Chemistry
32934538
10.1007/S00360-004-0463-Z
32,934,538
Diel variation in ammonia excretion, glutamine levels, and hydration status in two species of terrestrial isopods
Terrestrial isopods (suborder Oniscidea) excrete most nitrogen diurnally as volatile ammonia, and ammonia-loaded animals accumulate nonessential amino acids, which may constitute the major nocturnal nitrogen pool. This study explored the relationship between ammonia excretion, glutamine storage/mobilization, and water ...
1
Journal of Comparative Physiology B-biochemical Systemic and Environmental Physiology
55653593
10.4172/JRR.1000108
55,653,593
Biological Activities of Rice Allelochemicals Momilactone A and B
Momilactone A and B had been demonstrated to play critical roles in rice allelopathy by the findings of physiological and genetical approaches. Rice plants secrete momilactones into the rhizosphere over their entire life cycle at phytotoxic levels, and momilactones are able to account for the majority of the observed ...
1
Rice Research: Open Access
10181608
10.1086/639566
10,181,608
Seasonal Adjustment of Solar Heat Gain Independent of Coat Coloration in a Desert Mammal
Despite the apparent importance of solar radiation as a source of heat for free-living animals, there exists no substantial body of empirical data describing physiological responses to solar radiation under the range of convective conditions likely to occur in nature. We therefore quantified effects of simulated solar ...
1
Physiological and Biochemical Zoology
87871330
10.2307/1565367
87,871,330
Antipredator Mechanisms of Australian Frogs
We examined the antipredator mechanisms of 19 Australian hylid species (two genera) and 23 myobatrachid species (nine genera). Frogs of 39 of the 42 species exhibited one or more defensive mech- anisms (other than escape), including postures, bright coloration, adhesive skin secretions, and/or calls. De- fensive postur...
1
Journal of Herpetology
15382067
10.1016/J.CUB.2007.07.011
15,382,067
Microtubule Assembly Dynamics at the Nanoscale
The labile nature of microtubules is critical for establishing cellular morphology and motility, yet the molecular basis of assembly remains unclear. Here we use optical tweezers to track microtubule polymerization against microfabricated barriers, permitting unprecedented spatial resolution. We find that microtubul...
1
Current Biology
17847436
10.1098/RSOS.140322
17,847,436
Impact behaviour of freeze-dried and fresh pomelo (Citrus maxima) peel: influence of the hydration state
Pomelos (Citrus maxima) are known for their thick peel which—inter alia—serves as energy dissipator when fruits impact on the ground after being shed. It protects the fruit from splitting open and thus enables the contained seeds to stay germinable and to potentially be dispersed by animal vectors. The main part of the...
1
Royal Society Open Science
8885364
10.1007/S00049-010-0054-2
8,885,364
First insights into the chemical defensive system of the erotylid beetle, Tritoma bipustulata
The present study provides the first insights into the chemical defensive system of the erotylid beetle, Tritoma bipustulata, and furthermore reports the previously hardly known ability of abdominal reflex bleeding in this coleopteran family. The defensive chemistry of the secretion of pronotal glands, abdominal reflex...
1
Chemoecology
5039678
10.1016/J.TIBTECH.2009.11.005
5,039,678
Forisomes: calcium-powered protein complexes with potential as 'smart' biomaterials.
Sieve tubes in legumes contain forisomes, which are spindle-like bodies that are composed of ATP-independent, mechanically active proteins. Upon injury, forisomes occlude sieve tubes by dispersion and thus, help to prevent loss of nutrient-rich transport sap. Forisome enlargement by dispersion is brought about by Ca2+-...
1
Trends in Biotechnology
84979294
10.1139/B51-022
84,979,294
THE SPLASH-CUP DISPERSAL MECHANISM IN PLANTS
The late Prof. A. H. R. Buller regarded certain cup-shaped reproductive bodies found among cryptogams as "splash-cups" which make use of the energy of raindrops for the dispersal of spores, sperms, and gemmae. Buller's concepts are presented and supplemented by investigations carried out since his death. Raindrops caus...
1
Botany
13934382
10.1016/J.ANBEHAV.2013.11.008
13,934,382
Cooperating to compete: altruism, sexual selection and causes of male reproductive cooperation
Competition among males for access to reproductive opportunities is a central tenet of behavioural biology that has critical implications for studies of mating systems, sexual selection and the evolution of numerous phenotypic traits. Given the expectation that males should compete vigorously for access to females, it ...
1
Animal Behaviour
1604206
10.1098/RSPB.2011.0489
1,604,206
Volumetric imaging of shark tail hydrodynamics reveals a three-dimensional dual-ring vortex wake structure
Understanding how moving organisms generate locomotor forces is fundamental to the analysis of aerodynamic and hydrodynamic flow patterns that are generated during body and appendage oscillation. In the past, this has been accomplished using two-dimensional planar techniques that require reconstruction of three-dimensi...
1
Proceedings of The Royal Society B: Biological Sciences
1290125
10.1098/RSBL.2010.1163
1,290,125
Colour-producing β-keratin nanofibres in blue penguin (Eudyptula minor) feathers
The colours of living organisms are produced by the differential absorption of light by pigments (e.g. carotenoids, melanins) and/or by the physical interactions of light with biological nanostructures, referred to as structural colours. Only two fundamental morphologies of non-iridescent nanostructures are known in fe...
1
Biology Letters
19878427
10.1016/J.ACTBIO.2016.05.022
19,878,427
A lightweight, biological structure with tailored stiffness: The feather vane.
UNLABELLED The flying feathers of birds are keratinous appendages designed for maximum performance with a minimum weight penalty. Thus, their design contains ingenious combinations of components that optimize lift, stiffness, aerodynamics, and damage resistance. This design involves two main parts: a central shaft that...
1
Acta Biomaterialia
206536172
10.1126/SCIENCE.1210558
206,536,172
Fatty Acids Identified in the Burmese Python Promote Beneficial Cardiac Growth
A specific set of circulating fatty acids triggers cardiac hypertrophy in snakes and mammals. Burmese pythons display a marked increase in heart mass after a large meal. We investigated the molecular mechanisms of this physiological heart growth with the goal of applying this knowledge to the mammalian heart. We found ...
1
Science
137342942
10.1007/S11837-010-0009-7
137,342,942
Dynamic fracture resilience of elk antler: Biomimetic inspiration for improved crashworthiness
The antler of the North American elk has been shown to have impressive fracture resistance under quasi-static loads, but given its viscoelastic behavior and impact nature of loading, questions remain as to its mechanical, and in particular, fracture behavior under dynamic loading. Samples were tested using a unique spl...
1
JOM
22538251
10.1083/JCB.201012094
22,538,251
Lymphatic vascular morphogenesis in development, physiology, and disease
The lymphatic vasculature constitutes a highly specialized part of the vascular system that is essential for the maintenance of interstitial fluid balance, uptake of dietary fat, and immune response. Recently, there has been an increased awareness of the importance of lymphatic vessels in many common pathological condi...
1
Journal of Cell Biology
6459100
10.3762/BJNANO.2.22
6,459,100
Infrared receptors in pyrophilous (“fire loving”) insects as model for new un-cooled infrared sensors
Beetles of the genus Melanophila and certain flat bugs of the genus Aradus actually approach forest fires. For the detection of fires and of hot surfaces the pyrophilous species of both genera have developed infrared (IR) receptors, which have developed from common hair mechanoreceptors. Thus, this type of insect IR re...
1
Beilstein Journal of Nanotechnology
6847842
10.1128/AEM.54.7.1678-1681.1988
6,847,842
Ice Nucleation Activity in Lichens
A newly discovered form of biological ice nucleus associated with lichens is described. Ice nucleation spectra of a variety of lichens from the southwestern United States were measured by the drop-freezing method. Several epilithic lichen samples of the genera Rhizoplaca, Xanthoparmelia, and Xanthoria had nuclei active...
1
Applied and Environmental Microbiology
10164030
10.1016/J.GENE.2008.07.025
10,164,030
Cold-adapted tubulins in the glacier ice worm, Mesenchytraeus solifugus.
Glacier ice worms, Mesenchytraeus solifugus and related species, are the only known annelids that survive obligately in glacier ice and snow. One fundamental component of cold temperature adaptation is the ability to polymerize tubulin, which typically depolymerizes at low physiological temperatures (e.g., <10 degrees ...
1
Gene
91861421
10.1098/RSPB.2018.2501
91,861,421
Loss of top-down biotic interactions changes the relative benefits for obligate mutualists
The collapse of mutualisms owing to anthropogenic changes is contributing to losses of biodiversity. Top predators can regulate biotic interactions between species at lower trophic levels and may contribute to the stability of such mutualisms, but they are particularly likely to be lost after disturbance of communities...
1
Proceedings of The Royal Society B: Biological Sciences
34558350
10.1007/S000400050026
34,558,350
Nesting biology of the mangrove mud-nesting ant Polyrhachis sokolova Forel (Hymenoptera, Formicidae) in northern Australia
The nest sites of the mud-nesting ant Polyrhachis sokolova were studied in Darwin Harbour mangroves. They were found from the Ceriops tagal zone to the Rhizophora stylosa zone at elevations ranging from 7.22 to 5.99 meters above the lowest astronomical tide (LAT), which means that the nests were inundated in 13‐61% of ...
1
Insectes Sociaux
6694204
10.1073/PNAS.0914720107
6,694,204
Capillarity-based switchable adhesion
Drawing inspiration from the adhesion abilities of a leaf beetle found in nature, we have engineered a switchable adhesion device. The device combines two concepts: The surface tension force from a large number of small liquid bridges can be significant (capillarity-based adhesion) and these contacts can be quickly mad...
1
Proceedings of the National Academy of Sciences of the United States of America
7731573
10.1242/JEB.043216
7,731,573
Harbor seal vibrissa morphology suppresses vortex-induced vibrations
Harbor seals (Phoca vitulina) often live in dark and turbid waters, where their mystacial vibrissae, or whiskers, play an important role in orientation. Besides detecting and discriminating objects by direct touch, harbor seals use their whiskers to analyze water movements, for example those generated by prey fish or b...
1
The Journal of Experimental Biology
87352720
10.2307/1564398
87,352,720
Rain-Harvesting in the Lizard, Phrynosoma cornutum: Behavior and Integumental Morphology
During rainstorms, Texas horned lizards in enclosures were observed to exhibit a stereotyped behavior termed "rain-harvesting." The behavior involves: (1) raising the abdomen in an arch; (2) splaying and extending the legs; (3) dorso-ventral flattening and lateral spreading of the body; (4) lowering the head and tail; ...
1
Journal of Herpetology
4340043
10.1038/NATURE03185
4,340,043
How the Venus flytrap snaps
The rapid closure of the Venus flytrap (Dionaea muscipula) leaf in about 100 ms is one of the fastest movements in the plant kingdom. This led Darwin to describe the plant as “one of the most wonderful in the world”. The trap closure is initiated by the mechanical stimulation of trigger hairs. Previous studies have foc...
1
Nature
21486918
10.1177/1934578X1501000508
21,486,918
Momilactone Sensitive Proteins in Arabidopsis thaliana
The labdane-related diterpenoid, momilactone B has potent growth inhibitory activity and was demonstrated to play a particularly critical role in the allelopathy of rice (Oryza sativa L.). However, there is limited information available about the mode of action of momilactone B on the growth inhibition. The present res...
1
Natural Product Communications
88259628
10.2307/1565147
88,259,628
Rain-drinking behaviors of the Australian thorny devil (Sauria: Agamidae)
During natural and simulated rainfall, Moloch horridus used the cutaneous surface of its integument as a water-harvesting system to capture rain water for drinking. Circumstantial behavioral evidence, in combination with experimental studies (Withers, 1993), suggests that the capillary, interscalar, water-transport sys...
1
Journal of Herpetology
34174120
10.1103/PHYSREVE.94.032403
34,174,120
Effect of catch bonding on transport of cellular cargo by dynein motors.
Recent experiments have demonstrated that dynein motors exhibit catch bonding behavior, in which the unbinding rate of a single dynein decreases with increasing force, for a certain range of force. Motivated by these experiments, we study the effect of catch bonding on unidirectional transport properties of cellular ca...
1
Physical Review E
83946742
10.1098/RSBL.2011.0081
83,946,742
Defining frontiers in mite and frog alkaloid research
Raspotnig et al. comment on our recent finding of skin alkaloids in miniaturized Eleutherodactylus frogs from Cuba, which might be taken up from the high proportion of mites among their prey [[2][2]]. They provide a summary of current knowledge about alkaloid content and alkaloid
1
Biology Letters
137864185
10.1243/13506501JET143
137,864,185
Molecular mechanisms of synovial joint lubrication
Current models for lubrication of synovial joints, and the nature of the cartilage surface, are briefly recalled. Direct friction studies between polymers attached to surfaces are then considered, particularly the very recent demonstration of extreme friction reduction enabled by hydrated ions and by charged polymers. ...
1
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
18142462
10.1016/J.JTBI.2011.05.007
18,142,462
Elastic instability model of rapid beak closure in hummingbirds.
The hummingbird beak, specialized for feeding on floral nectars, is also uniquely adapted to eating flying insects. During insect capture the beak often appears to close at a rate that cannot be explained by direct muscular action alone. Here we show that the lower jaw of hummingbirds has a shape and compliance that al...
1
Journal of Theoretical Biology
34018320
10.1098/RSBL.2011.0982
34,018,320
Evidence for a vertebrate catapult: elastic energy storage in the plantaris tendon during frog jumping
Anuran jumping is one of the most powerful accelerations in vertebrate locomotion. Several species are hypothesized to use a catapult-like mechanism to store and rapidly release elastic energy, producing power outputs far beyond the capability of muscle. Most evidence for this mechanism comes from measurements of whole...
1
Biology Letters
39477948
10.1271/BBB.100692
39,477,948
Chemical Identity of a Rotting Animal-Like Odor Emitted from the Inflorescence of the Titan Arum (Amorphophallus titanum)
The titan arum, Amorphophallus titanum, is a flowering plant with the largest inflorescence in the world. The flower emits a unique rotting animal-like odor that attracts insects for pollination. To determine the chemical identity of this characteristic odor, we performed gas chromatography-mass spectrometry-olfactomet...
1
Bioscience, Biotechnology, and Biochemistry
42723157
10.1098/RSIF.2015.1022
42,723,157
Resilience in social insect infrastructure systems
Both human and insect societies depend on complex and highly coordinated infrastructure systems, such as communication networks, supply chains and transportation networks. Like human-designed infrastructure systems, those of social insects are regularly subject to disruptions such as natural disasters, blockages or bre...
1
Journal of the Royal Society Interface
3448081
10.1371/JOURNAL.PCBI.1002792
3,448,081
Experimental Studies and Dynamics Modeling Analysis of the Swimming and Diving of Whirligig Beetles (Coleoptera: Gyrinidae)
Whirligig beetles (Coleoptera, Gyrinidae) can fly through the air, swiftly swim on the surface of water, and quickly dive across the air-water interface. The propulsive efficiency of the species is believed to be one of the highest measured for a thrust generating apparatus within the animal kingdom. The goals of this ...
1
PLOS Computational Biology
24489519
10.1016/J.ASD.2004.05.006
24,489,519
Design and mechanical properties of insect cuticle.
Since nearly all adult insects fly, the cuticle has to provide a very efficient and lightweight skeleton. Information is available about the mechanical properties of cuticle-Young's modulus of resilin is about 1 MPa, of soft cuticles about 1 kPa to 50 MPa, of sclerotised cuticles 1-20 GPa; Vicker's Hardness of scleroti...
1
Arthropod Structure & Development
4257709
10.1038/297062A0
4,257,709
Male Eufriesia purpurata, a DDT-collecting euglossine bee in Brazil
While studying the ecology of the malaria vector Anopheles (Nyssorhynchus) darlingi Root along the Ituxi River, Amazonas, Brazil, we observed aggregates of bees on the walls of houses that were routinely sprayed with DDT. Several bees collected from DDT-treated house walls in August 1978 were identified as male specime...
1
Nature
13143063
10.1152/PHYSIOLOGYONLINE.1998.13.6.281
13,143,063
Brain Cooling: An Economy Mode of Temperature Regulation in Artiodactyls.
Artiodactyls employ selective brain cooling (SBC) regularly during experimental hyperthermia. In free-ranging antelopes, however, SBC often was present when body temperature was low but absent when brain temperature was near 42 degrees C. The primary effect of SBC is to adjust the activity of the heat loss mechanisms t...
1
Physiology
86041322
10.1665/1082-6467(2005)14[223:DLGACK]2.0.CO;2
86,041,322
Desert locust gregarization: a conceptual kinetic model
A better understanding of the mechanisms that underlie phase transformation in a solitarious desert locust population is an important prerequisite for the development of a quantitative gregarization model and for predicting locust outbreaks. Two types of processes are involved: 1) clustering at diminishing spatial scal...
1
Journal of Orthoptera Research
205809949
10.1016/J.JCIS.2011.06.084
205,809,949
Nanoscale biomimetics studies of Salvinia molesta for micropattern fabrication.
The emerging field of biomimetics allows one to take inspiration from nature and mimic it in order to create various products, devices and structures. There are a large number of objects, including bacteria, plants, land and aquatic animals and seashells, with properties of commercial interest. The subject of interest ...
1
Joint International Conference on Information Sciences
39292444
10.1126/SCIENCE.296.5566.250
39,292,444
Biology Reveals New Ways to Hold on Tight
At an unusual recent meeting, biologists and materials scientists swapped notes about how natural and artificial adhesives work. The materials scientists discussed physical or chemical properties that biologists should consider as they try to figure out how nature performs its sticky tricks. The biologists described ho...
1
Science
8878515
10.1242/JEB.057455
8,878,515
Regulation of brain temperature in winter-acclimatized reindeer under heat stress
Reindeer (Rangifer tarandus) are protected against the Arctic winter cold by thick fur of prime insulating capacity and hence have few avenues of heat loss during work. We have investigated how these animals regulate brain temperature under heavy heat loads. Animals were instrumented for measurements of blood flow, tis...
1
The Journal of Experimental Biology
35169118
10.1016/J.MVR.2014.07.001
35,169,118
Lymphatic collecting vessel maturation and valve morphogenesis.
The lymphatic vasculature plays an essential role in the maintenance of tissue interstitial fluid balance and in the immune response. After capture of fluids, proteins and antigens by lymphatic capillaries, lymphatic collecting vessels ensure lymph transport. An important component to avoid lymph backflow and to allow ...
1
Microvascular Research
84137887
10.1139/A10-014
84,137,887
Osmotic adjustment and plant adaptation to environmental changes related to drought and salinity.
The salinization and water deficit of soil are widespread environmental problems in limiting plant survival, growth, and productivity. However, some plants could adopt some strategies to resist salinity and drought stresses. Among these strategies, the mechanism of osmotic adjustment could help plants and algae to avoi...
1
Environmental Reviews
4779013
10.1038/NRMICRO2166
4,779,013
Electron transfer in syntrophic communities of anaerobic bacteria and archaea
Interspecies electron transfer is a key process in methanogenic and sulphate-reducing environments. Bacteria and archaea that live in syntrophic communities take advantage of the metabolic abilities of their syntrophic partner to overcome energy barriers and break down compounds that they cannot digest by themselves. H...
1
Nature Reviews Microbiology
9280009
10.1242/JEB.019273
9,280,009
An insect trap as habitat: cohesion-failure mechanism prevents adhesion of Pameridea roridulae bugs to the sticky surface of the plant Roridula gorgonias
The glandular trichomes of the plant Roridula gorgonias release an extremely adhesive, visco-elastic, resinous secretion that traps a variety of insects, including those having a considerable body size. However, the specialized mutualistic mirid bug Pameridea roridulae lives and walks on this sticky plant surface witho...
1
The Journal of Experimental Biology
41858802
10.1007/S11829-007-9012-5
41,858,802
Taste perception in honeybees: just a taste of honey?
The advent of the genomic era has opened new doors to understand the fundamental organization of living organisms and has therefore promoted a fertile field of comparative research that intends to identify similarities and differences between related and unrelated species at the genomic level. One of the organisms whos...
1
Arthropod-plant Interactions
8373160
10.2307/1542085
8,373,160
The Functional Morphology of Starfish Tube Feet: The Role of a Crossed-Fiber Helical Array in Movement.
The morphology and mechanics of the tube feet, ampullae, and lateral and radial canals of the water vascular systems of Luidia clathrata and Astropecten articulatus (Echinodermata, Asteroidea) were analyzed. Histological methods, based on embedding in both paraffin and glycol methacrylate, were used to document the arr...
1
The Biological Bulletin
8293685
10.1098/RSPB.2013.1758
8,293,685
How ticks get under your skin: insertion mechanics of the feeding apparatus of Ixodes ricinus ticks
The tick Ixodes ricinus uses its mouthparts to penetrate the skin of its host and to remain attached for about a week, during which time Lyme disease spirochaetes may pass from the tick to the host. To understand how the tick achieves both tasks, penetration and attachment, with the same set of implements, we recorded ...
1
Proceedings of The Royal Society B: Biological Sciences
4297086
10.1038/217086B0
4,297,086
Mechanism of Closure of the Aortic Valve
THE human aortic valve consists of three cusps made of relatively inelastic, muscle-free material about 0.15 mm thick. It opens and shuts about once a second, and withstands a pressure difference of 100 mm of mercury when closed. It usually functions for 70 yr without failure, and works so efficiently that very little ...
1
Nature
1923859
10.1098/RSTA.2009.0022
1,923,859
Superhydrophobic and superhydrophilic plant surfaces: an inspiration for biomimetic materials
The diversity of plant surface structures, evolved over 460 million years, has led to a large variety of highly adapted functional structures. The plant cuticle provides structural and chemical modifications for surface wetting, ranging from superhydrophilic to superhydrophobic. In this paper, the structural basics of ...
1
Philosophical Transactions of the Royal Society A
35316058
10.1074/JBC.R100052200
35,316,058
Synaptotagmins: Why So Many?*
null
1
Journal of Biological Chemistry
25144998
10.1242/JEB.058172
25,144,998
Localized fluidization burrowing mechanics of Ensis directus
Muscle measurements of Ensis directus, the Atlantic razor clam, indicate that the organism only has sufficient strength to burrow a few centimeters into the soil, yet razor clams burrow to over 70 cm. In this paper, we show that the animal uses the motions of its valves to locally fluidize the surrounding soil and redu...
1
The Journal of Experimental Biology
4365948
10.1038/423923A
4,365,948
Plant hydraulics: The ascent of water
When you're a large organism and made of wood, you can't have a heart or other contractile organs, but you still need to move fluids to live. How is this done?
1
Nature
36205261
10.1021/JO101237E
36,205,261
Small molecules that modulate quorum sensing and control virulence in Pseudomonas aeruginosa.
Bacteria use small molecule signals to access their local population densities in a process called quorum sensing (QS). Once a threshold signal concentration is reached, and therefore a certain number of bacteria have assembled, bacteria use QS to change gene expression levels and initiate behaviors that benefit the gr...
1
Journal of Organic Chemistry
97804727
10.1039/C3RA41096J
97,804,727
Structural coloration in nature
Nature's color has three main sources: pigments, structural colors and bioluminescence. Structural color is a special one, which is the color produced by micro- or nano-structures, and is bright and dazzling. The most common mechanisms of structural colors are film interference, diffraction grating, scattering and phot...
1
RSC Advances
16178409
10.1093/JEXBOT/51.353.2085
16,178,409
The functional morphology of the petioles of the banana, Musa textilis.
Bananas are among the largest herbs in the world and their lightweight petioles hold up huge leaves. This study examined how the petioles manage to achieve adequate rigidity to do this, while allowing extensive and reversible reconfiguration in high winds. Morphological and anatomical examination of the petioles and le...
1
Journal of Experimental Botany
8210479
10.1007/S10886-009-9707-4
8,210,479
Assessment of the Phytotoxic Potential of m-Tyrosine in Laboratory Soil Bioassays
The significance of soil-allelochemical interactions was addressed in this paper through studies conducted with m-tyrosine, an amino acid analogue and a potent plant growth inhibitor, in a series of laboratory assays performed in field soil or growth media. The studies were performed as a basis for further evaluation o...
1
Journal of Chemical Ecology
5265341
10.1126/SCIENCE.1181044
5,265,341
Iron-Clad Fibers: A Metal-Based Biological Strategy for Hard Flexible Coatings
Mussel Fibers While it is possible to make strong fibers or threads from organic materials, most suffer from high wear abrasion. Marine mussels attach themselves to rocky seashores using a series of byssal threads. Despite the constant rubbing caused by the motion of the tides, the threads show high wear resistance. Ha...
1
Science
135121625
10.1023/A:1009223730317
135,121,625
The cellulose system in viscin from mistletoe berries
The cellulose system of the viscous fibrous cellulosic polysaccharide (viscan) in the viscin tissue of the European mistletoe, Viscum album L., was analyzed by chemical and physicochemical techniques including sugar analysis, optical and transmission electron microscopy, X-ray and electron diffraction together with sol...
1
Cellulose
19954251
10.1152/AJPREGU.1988.254.2.R389
19,954,251
Comparison of IR thermography and thermocouple measurement of heat loss from rabbit pinna.
The temperature of the pinnae of male New Zealand White rabbits was measured by use of infrared thermography. At ambient temperatures of 15, 20, and 25 degrees C, the average pinna temperatures were 23.0, 28.7, and 36.2 degrees C, respectively. From these temperatures, average heat loss from the total pinna surface are...
1
American Journal of Physiology-regulatory Integrative and Comparative Physiology
205236244
10.1002/ADMA.200904411
205,236,244
The salvinia paradox: superhydrophobic surfaces with hydrophilic pins for air retention under water.
Prof. W. Barthlott, S. Wiersch, Dr. H. F. Bohn Nees-Institut für Biodiversität der Pflanzen Rheinische Friedrich-Wilhelms-Universität Meckenheimer Allee 170, 53115 Bonn (Germany) E-mail: barthlott@uni-bonn.de Prof. Th. Schimmel, Dr. M. Barczewski, Dr. S. Walheim, A. Weis, A. Kaltenmaier Institute of Applied Physics and...
1
Advanced Materials