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Likely politically unpopular
Common scientific tool Not developed for Biscayne Bay, but biodiversity May be useful with further study Biodiversity is a generally accepted "good thing" On going sampling programs could be a
Common scientific tool Not developed for Biscayne Bay Very expensive and long term
Likely politically unpopular
Impacts from acts of nature (e.g., hurricanes)
Relatively easy to monitor No soils present
Entire shoreline bulkheaded
May reveal additional contaminated soils
FEASIBILITY OF COST-EFFECTIVE
PERFORMANCE STANDARDS
(Very costly (0), Comparatively inexpensive (5)
3 3
Reductions in indicator species may not
be related to diminishing fresh water flows
Yes - Some data already being
compiled
THREATS & Score
(0 = large # of threats, 5= few)
1
SPEED OF
ADAPTIVE MGMT
(Slow (0), Medium (3) , Fast (5))
Replacement of seawalls with mangroves not
feasible
STRENGTHS & Score
(0 - no strengths, 5 = strong)
WEAKNESSES & Score
(0 = Very weak, 5 = few weaknesses)
Existing conditions are highly variable due
to unnaturally high tidal exchange
Creating estuarine conditions would
require substantive infrastructure changes
Economy viewed as more important than
ecological conditions in this sub-region
OPPORTUNITIES & Score
(0 = creates numerous problems;
5 = creates few problems)
Ecological Preservation
Valued Ecosystem Component
(Manatees and Johnson's Seagrass)
Community Index
4
Indicator Species
(Manatees and Johnson's Seagrass) 3
Would increase biodiversity by establishing an estuarine condition
Pre-development Scenario
4
1
Soil Characteristics
If salinities are correct for seagrasses,
conditions will be suitable for numerous
other species
2
Requirement for preferred fish
communities 3
Food Web Support 1
3
Presence/Absence/Vitality
of Preferred Habitats
Historic mangrove shorelines would be
recreated
2
1 1
Would require restoration of mangrove
shorelines and seagrass habitats
Recreational fishing is not important in Miami
River
Would require changing shoreline from 1
bulkhead to vegetation
Toxins and heavy metals known to be present in sediments
0 1
2
1
1 2
Add'l restrictions to maintain current
status would not likely receive public
acceptance
Public acceptance fairly high for fisheries
habitat
Would cause adverse impacts on
existing industry
6
1
Future reductions in Johnson's seagrass presence
may not be related to diminishing fresh water
flows
Additional restrictions to protect seagrasses
are often highly controversial
3
1
Slow 1
5
0
0
Medium
3 4
2
Medium
Slow
Slow