BS110 Community Ecology

BS110 Community Ecology - Community Ecology 16 January 2008...

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Unformatted text preview: Community Ecology 16 January 2008 BS 110 Group project Choose a biome Then choose 10 different animal species adapted to that biome (NOT species discussed in biomes lecture) Write up a group report about how each species adaptations enable it to survive in that biome. (Be sure you are writing about specific adaptations to that biome, not general characteristics.) The report should be at least page word-processed, single-spaced. End with 1-sentence statement agreed on by all group members summarizing each members contributions; all should sign. Type and print out, with your group number and name at top Some extra credit for exceptionally good assignments Points off for not following directions 0 for plagiarism All sources must be credited! See next page Due Monday 20 Jan at start of class Crediting sources Source list is not counted in the required + page length Illustrations OK; if not original to you, source must be credited. Illustrations not counted in require + page length Websites: URL, date accessed Journal article format: Author, F.I. Date. Article title. Journal Title Vol.#: pp- pp. Book format: Author, F.I. Date. Book title. Place, Publisher. What are Ecological Communities? The species that live and interact in an area Loose assemblages of species Each species has unique interactions with its biotic and abiotic environments Sources of energy in a community Communities often contain hundreds or many thousands of species We dont know all the details of interactions Understanding of trophic structure allows us to understand interactions Trophic level A group of organisms united by obtaining their energy from the same part of the food web of a biological community Their energy source has passed through the same number of steps before it reaches them Trophic levels Primary producers = photosynthesizers = autotrophs Solar energy All others heterotrophs or consumers: Primary consumers = herbivores Tissues of producers Secondary consumers = primary carnivores herbivores Tertiary consumers = secondary carnivores Primary carnivores Omnivores several trophic levels Detritivores = decomposers Dead bodies, waste products Food chains and food webs Sequence of trophic interactions is a food chain if each species only eats one species and is eaten only by one species Food web if more complex Usual situation Number and Shape of Trophic Levels Usually only 3-5 in a community Why?...
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This note was uploaded on 03/19/2008 for the course BS 110 taught by Professor S.lawrence during the Spring '07 term at Michigan State University.

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BS110 Community Ecology - Community Ecology 16 January 2008...

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