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Lecture+14+outline - Pelagic Deep scattering layer Polar...

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Lecture 14: Life in the Ocean Review Lecture 13 Let’s summarize the ocean environment in terms of productivity (just one example, not 3 like the textbook):
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Chordates Proposed family tree for chordates Fish
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Marine Reptiles Marine Birds
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Marine Mammals Cetacea – Carnivora - Sirenia – Baleen whales Toothed whales
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Whales have many interesting behaviors since they are highly intelligent mammals.
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The Ocean Environment Ecology An ecosystem Classification of the Ocean Environment Scientists divide the marine environment into zones , areas with homogeneous physical features.
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Marine Communities Population: Community: Marine Communities In each case, pay attention for the following: What is unique about this environment? What organisms live there? How did the organisms adapt to this environment?
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Kelp Forests They are like an underwater forest
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Mangroves: Salt marshes/ estuary Coral Reefs
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Coral reefs form along coastlines The open ocean community
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Unformatted text preview: Pelagic : Deep scattering layer: Polar Ecosystems Trophic Levels Can be described as a simple pyramid : Primary producers are at bottom and top consumer (carnivore) is at the top. What went in to your tuna sandwich? Growth rate and carrying capacity Growth rate: organisms in a favorable environment will grow exponentially, in a J-shaped curve. As soon as growth-limiting factors are encountered, the curve will smooth out Carrying capacity: the population of each species that a community can support under stable environmental conditions Sea otters A keystone species : a species with a large effect on its community relative to its abundance Population has since bounced back What impact would this have on sea urchin and kelp forest populations? A food web is a more accurate way to understand feeding relationships Top Down Vs. Bottom Up control of the food web...
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