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Stack #694158
bio chapter 4
| Question | Answer |
|---|---|
| ecology | the study of interactions between organisms and their living and non-living environment |
| abiotic factor | a non-living factor that influenecs an organism ex.sunlight,soil,rocks |
| biotic factor | a living factor that in fluences an organism ex.humans and animals |
| ectone | a transition area between ecosystems |
| ecological niche | an organism's role in an ecosystem,consisting of its place in the food web |
| biome | a large geographical region with a specific range of temeratures and precipitation organisms that are adapted to those conditions |
| canopy | the upper layer of vegetation in a forest |
| permafrost | permanently frozen soil |
| muskeg | soil above the permafrost that is swampy or boggy in summer |
| understorey | below the canopy layer,usually shrubs and smaller trees |
| littoral zone | the area from the shore of a lake or pond to point where no more plants grow in the lake bottom |
| limnetic zone | the area of a lake or pond in which there is open water and sufficient light for photosynthesis to occur |
| plankton | autotrophic and heterotrophic microorganisms found in the limnetic zone of a lake or pond |
| profundal zone | the region of a lake beneath the limnetic zone: in which there is insufficient light for photosynthesis to occur |
| litter | the upper layer of soil,composed mainly of partially decomposed leaves or grasses |
| topsoil | the soil layer beneath the litter,composed of small particles of rock,mixed with humus |
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