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patrickbdevaney
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mia9

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Restoration to pre-development
conditions would be too expensive and
not likely politically viable
Inexpensive, but difficult to interpret
1 1
General ineffectiveness of existing regulatory
programs
Would require add'l approach for
open-water areas
Adverse impacts from non-salinity water
quality parameters
1
Public acceptance would likely be low
for replacing seawalls with shoreline
vegetation
Existing data base allows fast
response
2
2 2 16
Population declines may be unrelated to
reductions in freshwater flow
2 32 Somewhat Slow 3 15
1 5
17
1 8
1 11
2 33 3 4 20
Slow
No public support - Area is the only major
seaport in region
Slow 1 0 5
Potential difficulties in relating population
declines to reductions of fresh water flow
Enhanced awareness of H. johnsonii
could cause permitting problems
Designated critical habitat for manatees
and Johnson's seagrass
Potential difficulties in relating population
declines to reductions of fresh water flow
Healthy environment in this area is less
important than sustaining the economy
Removal & disposal of sediments
from River is problematic
Would require more intensive
seagrass mapping and monitoring 2
2
rev 11-15-03
Table E-4
Advantages and Disadvantages of Different MFL Approaches for Biscayne Bay
Central Sub-region
POTENTIAL APPROACHES APPROACH SCORE
(Cumulative Total)
Easily quantifiable Difficulty in relating pop. declines to flow Yes - Data already being compiled
Public can relate Confounding impacts re commercial harvest
Relatively easy to ID Significant Harm Pink shrimp annual recruitment Previously id'd in conceptual model Yes - Data already being compiled
A lot of scientific work already done Difficulty in monitoring minimal changes
Impacts of commercial harvest unknown May require controls on commercial harvest of shr
Sounds good to the public Public acceptance Difficult to quantify "vitality" Expensive and long term
Heterogeneous habitats
Public acceptance The situation would only get worse with time Inexpensive but not legal
Few Reduction in current legal uses of water
Public acceptance Lack of scientific base to work from Expensive and long term
Common scientific tool Not developed for Biscayne Bay May be useful with much further study Not understandable as real Expensive and long term
Common scientific tool Not developed for Biscayne Bay May be useful with much further study Impacts from acts of nature (e.g., hurricanes) Very expensive and long term
Easy to monitor Not connected to salinity changes alone
Only applicable west of shoreline
Increase in awareness of Johnson's seagrass
could result in permitting problems
Conceptually, "preserving the Bay" would be
popular with the public, but preservation would
likely involve maintaining degraded habitats
12
12
4 Medium 3 1
10
2 13 1 2
Food Web Support 1 1 2
Requirement for preferred fish
communities 1 1 1 Recreationally fishing is popular, but most
fisherman do not understand fish life histories
The preferred fish community based upon harvests is reefs, not generally sensitive
to freshwater flows in this area
Indicator Species
(Pink Shrimp and Shoal grass) 4 3 4
4
Would require monitoring 3 different components
Portions of Sub-region are presently
in a condition of Significant Harm
22
3 3 Medium 5 22
Preferred habitats is a 'fuzzy' concept - to
many people, estuarine species may be less
desirable than marine species in this part of the
bay
CERP & other restoration projects
have already been identified
Popular commercially harvested
species used by recreational fishermen
5 3