. The ecology of the Apalachicola Bay system : an estuarine profile . Detritus Production 1â f I 1 OETRITLIS-FEEDING INVERTEBRATES CALANOID COPEPQDS -^ OTHER _iO0PL^ , INVERTBBRATES â ANCHpyiES \ ^ ANCHOVIES PENAElp SHRIMP SEATROUT TOP PREDATORS ( Incluqing mon ) DEC JAN. FEB MAR APR MAY i JUN MONTH JUL. AUG. SEPT I OCT NOV Figure 38. Generdlized, simplified model of seasonal relationships of the dominant macroinvertebrates and fishes in the Apalachicola Bay system. The model associates population distribution with seasonal changes in key physical variables, productivity features, and t
. The ecology of the Apalachicola Bay system : an estuarine profile . Detritus Production 1â f I 1 OETRITLIS-FEEDING INVERTEBRATES CALANOID COPEPQDS -^ OTHER _iO0PL^ , INVERTBBRATES â ANCHpyiES \ ^ ANCHOVIES PENAElp SHRIMP SEATROUT TOP PREDATORS ( Incluqing mon ) DEC JAN. FEB MAR APR MAY i JUN MONTH JUL. AUG. SEPT I OCT NOV Figure 38. Generdlized, simplified model of seasonal relationships of the dominant macroinvertebrates and fishes in the Apalachicola Bay system. The model associates population distribution with seasonal changes in key physical variables, productivity features, and the predator-prey relationships of the estuary. trophic levels of the estuary. Of the 10 numerically dominant infaunal species (representing over 83% of the total number), five are detrital feeders, four are deposit feeders (surface and subsur- face), and one is a filter feeder. Of the entire infaunal assemblage, there are fifteen omnivore/carnivore types, seven subsurface deposit feeders, eleven surface deposit feeders, twelve (generalized) deposit feeders, and seven filter feeders. There are high numbers of the various filter-feeding mollusks such as Rangia cuneata and Crassostrea virginica. The important role of detritus and its associated microbial components is indicated by the predominance of the detritivore/omnivore feeders in the macroinvertebrate assemblages. Of the dominant litter-associated organisms, the polychaetes are generally omnivorous, consuming fine detritus, microalgae, copepods, and amphipods. The gastropods in the litter include omnivores, filter feeders, scavengers, suspension feeders, and carnivores. The herbivorous snail Neritina reel i vata is a species in the grassbeds of East Bay. The amphipods found among the litter assemblages include omnivores, detritus feeders (or leaf scavengers) and, in the case of some gammarids, filter feeders. A few species such as Hyalella azteca, Gammarus 86
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Keywords: ., bookauthorusfishandwildlifeservice, bookcollectionbiodiversity
