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Pop Growth and Aqua
Population Growth Curves and Aquatic Ecosystems
| Question | Answer |
|---|---|
| the death rate increases when a population goes over the ______ | carrying capacity |
| a population will continue to grow until it reaches its _______ | carrying capacity |
| the maximum size of a population that can be supported by the environment | carrying capacity |
| if population increases there will be what two things? | less resources, more disease |
| resources in short supply which slow down or halt population growth | limiting factors |
| food, water, available habitat | limiting factors |
| competition, predation, parasitism, crowding, stress, and disease are examples of _________ | density-dependent limiting factors |
| storms fires, tornadoes are examples of _________ | density-independent limiting factos |
| What are the 4 factors that impact population numbers? | birth rate, immigration, emmigration, death rate |
| j shaped curves, a baby boom, limiting factors not met are examples of _________________ | exponential growth |
| s shaped curve, lag phase, exponential phase, steady state are examples of | logistic growth curves |
| population growth occurs when | births exceed deaths |
| when birth rate = death rate | zero population growth |
| population has met its capacity | steady state |
| enclosed area where a river or stream empties into the ocean | estuary |
| most productive of all ecosystems | estuary |
| These are the primary producers of an estuary. | plankton, algae, eel grass, sea grass, marsh grasses andmangroves |
| salinity varies with flow of | fresh water |
| highly susceptible to pollution | estuary |
| What % of water on earth is fresh? | 2.5% |
| Where is most of the fresh water on earth? | glaciers |
| give an example of an entirely photic zone | ponds |
| give an example of a photic and aphotic zone | lakes |
| type of lake that has much organic waste and nutrients which speed up succession | eutrophic |
| lakes that are clear, pristing, and unpolluted | oligotrophic |
| zone that is closest to the shore, shallow, photic, has many producers and consumers | littoral zone |
| zone that is open water, well lit, and dominated by plankton | limnetic zone |
| zone with deepest water, aphotic, colder, and has less oxygen | profundal zone |
| sediment is picked ip, carried, and eventually deposited as mud or sand in ____________ | running water |
| flows in one direction from headwater to mouth | running water |
| plants adapt to current/root themselves | running water |
| few species here because of few nutrients | running water |
| marshes, swamps, and bogs | wetlands |
| salt tolerant grasses, shrimp and shellfish | salt marshes |
| ocean zone area between low and high tide | intertidal |
| ocean zone constantly pounded by surf or exposed to sunlight | intertidal |
| ocean zone over the continental shelf | neritic |
| ocean zone that is entirely photic | neritic |
| ocean zone where algae is the primary producer | neritic |
| ocean zone that is beyond the continental shelf and out of the open ocean | oceanic |
| ocean zone that is photic AND aphotic | oceanic |
| ocean zone where the primary producers are cyanobacteria, diatoms, dinoflagellates | oceanic |
| ocean zone with low mineral availability and low productivity | oceanic |
| marine organisms that live in open waters in neritic or oceanic zones | pelagic |
| marine organisms living in the deepest waters | bathypelagic |
| marine organisms that live in canyons or trenches | abyssal |
| marine organisms that are bottom-dwelling | benthic |
| areas where currents have brought up nutrient-rich waters from down below | updwellings |
| humboldt current off coast of Peru is an example of an _________ | upwellings |
| El Nino was a reversal of this | upwellings |
| This is the concentration and accumulation of toxic chemical and heavy metals up through the food chain where they become most concentrated in the top consumers (often man) | biological magnification |
| list 3 transitional aquatic ecosystems | wetlands, estuaries, salt marshes |
Created by:
serverge
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