Rainier Jr/Sr High School Mr. Taylor Basics of Ecology Rainier Jr/Sr High School Mr. Taylor
Definitions Ecosystem: A physically distinct, self-supporting unit of interacting organisms and their surrounding environment. To be “self-supporting” the following needs must be met: energy source: most often this is light energy from the sun converted to chemical energy through photosynthesis
Definitions Ecosystem: A physically distinct, self-supporting unit of interacting organisms and their surrounding environment. To be “self-supporting” the following needs must be met: the captured chemical energy must be transferred from one organism to another (this is usually done by eating other organisms)
Definitions Ecosystem: A physically distinct, self-supporting unit of interacting organisms and their surrounding environment. To be “self-supporting” the following needs must be met: there must be some method of decomposing waste materials and dead organisms which will accomplish....
Definitions Ecosystem: A physically distinct, self-supporting unit of interacting organisms and their surrounding environment. To be “self-supporting” the following needs must be met: a way to recycle nutrients back into the ecosystem. If nutrients aren’t recycled, the system will soon run out and collapse.
Definitions Population: a group of individuals of a single species occupying a common area and sharing common resources. (Same species, same place, same time). Community: an interacting group of populations whose members form a system of production, consumption, decomposition, and reuse of resources in a common area.
Ecologic Succession Biotic factors: those things that are living, were once living, or are waste products of a living organism. Abiotic factors: things that are not now and were never part of a living organism. sunlight, weather, water, soil type, slope, etc. Ecological succession: a predictable, orderly pattern of replacements of communities in an ecosystem
Ecologic Succession Bare land: contains NO organisms (living or dead) and usually few or no nutrients in a readily useable form bare rock, lava flows, new sand dunes, glacial ponds... Seral communities: those communities that establish themselves in succession but are eventually replaced by other communities. Each seral community creates conditions that make it impossible to sustain itself. lichens moss grass shrubs trees
Ecologic Succession Climax community: a stable almost permanent community. Conditions are present so it can sustain itself indefinitely. varies mostly by the abiotic factors present.
Ecologic Succession Primary succession: starts with bare ground or water. Pioneer species (the first ones to colonize) are usually microorganisms (bacteria, fungi, algae, etc.) Secondary succession: starts in an area where organisms have colonized before. fires, earthquakes, landslide, flood,... Pioneer species often grass/bushes.
Ecological succession
Ecological succession
Ecological succession
Ecological succession
Ecological succession
Ecological succession
Ecological succession
Ecological succession
Ecological succession
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