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mia9

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EVALUATION OF ALTERNATIVE APPROACHES
These nine approaches have been individually evaluated by sub-region of the
Bay for strengths, weaknesses, opportunities, threats, speed of information
return to managers for adaptive management decisions, and cost effectiveness of
potential performance standards. Tables D-1 to D-6 list the nine alternatives
considered for use for each of the six sub-regions, with values established on a
scale of 0-5 by best-professional-judgment by the BFA Team combined with
knowledge derived from the reviewed literature, and comments by interviewees
to the principal scientists. The six values were then added together for a final
score. The minimum score could therefore be 0, and the maximum 30. Table 5
lists the results of all of the analyses and shows that for each sub-region the
following approaches had the highest ratings: indicator species (Oleta and
Northern, Score 22 for both), community index (Miami River, Score 20), VECs
and indicator species tied for Central Biscayne Bay (Scores 22), VECs (South
Central, Score 22) and food web support (Southern, Score 26).
Table 5
Comparison of Different MFL Approaches for Each Sub-region
Oleta River
Snake Creek
Northern
Biscayne Bay
Miami River
Gov't Cut
Central
Biscayne Bay
South-Central
Biscayne Bay
Southern
Biscayne Bay
Shaded bocks indicate the recommended approach for each sub-region, based on it receiving the highest ranking.
It is important to note that these values represent a composite of multiple factors (see Appendix E).
12
15
5
10
12
22 16
13
26
10
5
15
12
5
10
12 12
12
12 12
12
6
15
12 6
5
12 20
12
11
5
14
12
12
12
16
22 15
6
18 18 16
22
17
Ecological Preservation 14
22 22
17
14 8
17
21
12
15
Soil Characteristics
Requirement for preferred
fish communities
Food Web Support
Sub-Region
Pre-development Scenario
Valued Ecosystem
Component(s)
Community Index
Indicator Species
POTENTIAL APPROACHES
Presence/Absence/Vitality
of Preferred Habitats
Recommendation of Preferred Approaches
Freshwater Flow and Ecological Relationships in Biscayne Bay 6-1
SECTION 6
RECOMMENDATION OF PREFERRED APPROACHES
The recommended approach to establishing minimum flows and levels for
Biscayne Bay is to utilize a different approach for each of the six sub-regions of
the Bay. Biscayne Bay is a large heterogeneous ecosystem that has undergone
major anthropogenic changes in the last 100 years. Thus each of the sub-regions
has unique characteristics that demand unique treatment regarding necessary
freshwater flows to either maintain existing conditions, or restore some
semblance of historical conditions to allow for a particular ecological function to