Marine Biology: An Ecological Approach |
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Page 278
... estuary , displacing the isohalines upstream . Low tides , by contrast , displace the iso- halines downstream . The result is that there is a certain area of the estuary that is subject to a salinity regime that changes with each tide ...
... estuary , displacing the isohalines upstream . Low tides , by contrast , displace the iso- halines downstream . The result is that there is a certain area of the estuary that is subject to a salinity regime that changes with each tide ...
Page 284
... estuary . Most tolerate salinities down to 15 % , with a few hardy species tolerating levels down to 3 %% ( Fig . 8-6 ) . The brackish water or true estuarine component comprises those species that are found in the middle reaches of the ...
... estuary . Most tolerate salinities down to 15 % , with a few hardy species tolerating levels down to 3 %% ( Fig . 8-6 ) . The brackish water or true estuarine component comprises those species that are found in the middle reaches of the ...
Page 292
... estuary . This behavior will have the effect of keeping the organism in an area where the salinity change is minimal . Consider , for example , a ... estuary as a Adult crab River Estuary Young crabs migrate into estuary Megalopa 292.
... estuary . This behavior will have the effect of keeping the organism in an area where the salinity change is minimal . Consider , for example , a ... estuary as a Adult crab River Estuary Young crabs migrate into estuary Megalopa 292.
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abundant adaptations algae algal amount amphipods anemones areas Atlantic bacteria barnacles benthic biology body bottom burrow carnivores changes Cnidaria communities competition copepods coral reef crabs crustaceans deep sea density deposit feeders depth desiccation detritus diatoms dinoflagellates dominant ecology ecosystems eggs epipelagic estuary fauna feeding Figure fishes fresh water grazing hence herbivores increased invertebrates kelp kelp beds large numbers larvae layers levels light living low tide major marine mammals marsh mesopelagic migrate mollusks Mytilus nekton number of species numbers nutrients occur ocean oxygen Pacific coast particles patterns pelagic percent Photo courtesy photophores photosynthesis physical factors phytoplankton plankton plants Plate polychaete population predators primary productivity reduced result rocky shores salinity salt sand beaches sea grass sea urchins sea water sediment shallow water squids substrate surface waters suspension feeders temperate temperature terrestrial thermocline tropical tuna upper various vertical water column water mass wave action whales zonation zone zooplankton zooxanthellae