BIOL208 Study Guide - Comprehensive Final Exam Guide - Photosynthesis, Leaf, Physiology
20 Nov 2018
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Document Summary
An arbitrarily defined geographic volume, containing interacting biotic and abiotic factors, connected to other ecosystems by a series of inputs and outputs. Additionally, they have a time dimension and humans may or may not be a part of this system. Breakdo(cid:449)(cid:374) : biotic- living (organisms, abiotic- non-living (water, rocks, soil ph, soil moisture, temperature, light) Abiotic factors influence the biotic factors in an ecosystem. Streams, lakes and rivers join a greater ecosystem, ocean: they have time dimension: ecosystems can slightly change over a short period of time hence when talking about populations we only talk about one point in time. Example: trees, squirrels and grass population make up a community at the main quad: population: organisms of same species that are at the same place at one point in time. Ecosystem concept: it is important to consider levels in an ecosystem when studying ecology, because one individual cannot always give the data needed.
