Unit2 Ecology Ic CommunitiesPresentation Transcript
Ecology I Community Ecology
Questions asked by Community Ecologists
How do species coexist?
How do they relate to each other?
How do communities change with time?
Food chains and webs
Food chain = simplified linear diagram of who eats whom
Food web = complex network of who eats whom
We can represent feeding interactions (and thus energy transfer) in a community:
Classification based on trophic level
Trophic level :
all organisms that share the same general type of food.
Unit 2: Ecology 1: Principles of Matter, Energy and LIfe
Aquatic examples Terrestrial examples Detritivores and decomposers Crayfish Water mold Aquatic bacteria Tertiary consumers Cormorant Hawk Secondary consumers Fish Rodent Primary consumers Zooplankton Grasshopper Producers Phytoplankton Grass Detritivores and decomposers Earthworm Shelf fungus Soil bacteria
White oak Caterpillar and other insects on leaves Spider Eastern chipmunk Cedar waxwing Beetles and other insects Blackberry Ticks Eastern cottontail White-tailed deer Rat snake Red-bellied woodpecker Shelf fungus Deer mouse Grasses Earthworm Soil bacteria American toad