Marine Biology: An Ecological Approach |
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Page 163
... bottom , usually 0.5 or 0.1 m2 . Since he had a sample that covered a known area of bottom , he could then count the numbers of organisms in those samples and from them , extrapolate the numbers in the whole bottom area . Once this was ...
... bottom , usually 0.5 or 0.1 m2 . Since he had a sample that covered a known area of bottom , he could then count the numbers of organisms in those samples and from them , extrapolate the numbers in the whole bottom area . Once this was ...
Page 170
... bottom or carries away the upper layer of sediment . Another disturbance may be the rapid deposition of sediment on the bottom . In certain cases , biological activity may also disturb the bottom , for instance when large fish such as ...
... bottom or carries away the upper layer of sediment . Another disturbance may be the rapid deposition of sediment on the bottom . In certain cases , biological activity may also disturb the bottom , for instance when large fish such as ...
Page 193
... bottom , the fauna is destroyed , either by mechanical action of the ice grinding against the bottom or by freezing the animals . This means that in polar areas , the shallowest subtidal areas are devoid of permanent communities down to ...
... bottom , the fauna is destroyed , either by mechanical action of the ice grinding against the bottom or by freezing the animals . This means that in polar areas , the shallowest subtidal areas are devoid of permanent communities down to ...
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Common terms and phrases
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