ecology lecture notes

Feb 3rd, 2012
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it is my pleasure to provide you with eclology notes that will provide you with lots of basic information, the notes will provide you with a clear map on how to study ecology. i have taken time to make sure that i provide the very best to you as a student who is always intersted to learn and grow in knowledge and understanding of the truth.

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ECOLOGICAL SUCCESSION Before and during formation of ecosystems succession is keyDfn-The tendency for ecosystems to change from simple tocomplexi. Primary: occurs on bare, lifeless substratesii. Secondary: occurs in areas which previously had life, but weredisturbed by some eventClimax community: the community that is established when thesuccession has stabilizedFugitive species: species which occur early in the successionalstages and later disappearECOSYSTEN TYPESBIOMES. A region with a distinct climate & organisms that live there Biomes generally blend into one another at their border Are determined based on the amount of annual rainfall1.Tropical rain forest High rainfall and high temperature High productivity despite infertile soil Nutrients are stored in plants and rapidly recycled Almost half of all terrestrial organisms live here2. Savanna Reduced rainfall and temperature Typically covered with grass and scattered trees Transitional between tropical rain forest and desert3.Desert Low rainfall and high temperatures Desert plants store water (succulents) and have extensiveroots Most animals are nocturnal (active at night) to avoid the heat Critical factor is water (behavior and physiology adapted toconserve water)4. Grasslands (prairie) Abundant rainfall and seasonal temperature changes Grasses are the most common plant (few trees) Grazing animals very common: horses, rabbit

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