EcosystemandBiogeochemicalCyclesx2x

EcosystemandBiogeochemicalCyclesx2x - Ecosystem and...

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Ecosystem and Biogeochemical Cycles
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Ecology Study of living things and their environments. Also known as Environmental science.
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Ecosystem A dynamic community of organisms living in a particular environment and the physical elements in that environment with which they interact. Habitat : A site where a plant or animal naturally lives and grows (within an ecosystem). Ecological Niche : The functional role of a given species within an ecosystem.
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Scientist have expressed concern that: Human activities are straining the natural resource system. Exceeding the crucial limits called THRESHOLDS . Resulting in instability and usually environmental deterioration.
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Living organisms: Exist in nature In a state of balance with one another.
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Law of Limiting Factors : - All organisms require minimum quantity of essentials such as nutrients, heat, light, space etc. - The size of any population is ultimately limited by one or more environmental factors. Excessive change imposes a serious threat to existence. Complex web of Interrelationships.
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Ecosystem: Living elements Non-Living elements Living Elements: Producers: Plants Consumers: Animals Decomposers: Bacteria, Fungi, Insects
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Non-Living Elements : Energy Source: Sun Chemicals: Carbon, Nitrogen, Oxygen, Phosphorous, Hydrogen, Sulfur Critical components of all biological life Elements: Wind and Water
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