In general, Alabama has aligned with Georgia, leaving Florida to make the case to give the needs of downstream ecosystems as much weight as those of upstream populations.
In contrast, P. newmani may be transported to Georges Bank from upstream populations on the Scotian Shelf and Browns Bank.
In terms of water, the upstream system is essentially providing an ESS in the form of water flow, and the upstream populations are the 'guardians' of this flow.
Generally, upstream populations such as Tunapuna experience lower maximum temperatures than downstream populations due to increased canopy coverage.
Mean AR was maximal (10.34) in S4a, the most downstream population, and minimal (3.46) in S9i, one of the most upstream populations (Table 1).
Our predictions suggest that in populations whose dispersal is subject to strong advection (e.g., high dispersal from the upstream populations to downstream) Ne will be more disassociated from actual census size than for populations less affected by advection.
