What is ecology?
Ecology is a study of how organisms interact with one another and with thier physical environment of matter and energy.
What keeps us and other organisms alive?
Life is sustained by the flow of energy from the sun through the biosphere,the cycling of nutrients within the biosphere,and gravity.
What are the major components of an ecosystem?
Some organisms produce the nutriens they need,others get the nutrients they need by consuming other organisms, and some recycle nurients back to producer by decomposing the wastes and remains of organisms.
What is biodiversity and why is it important?
The biodiversity found in the earth's genes, species,ecosystem processes is vital to sustaining life on the earth.
功能多樣性 for functional diversity ,能量和物質的循環需要生物
生態多樣性 森林.沙漠.草原.海洋.溪流.湖泊及其他生物群落彼此間或與其無生物環境之間交互影響的各種型態
基因多樣性 單一物種內個體 基因組成的變化性
物種多樣性 不同棲地內物種的數目
What happens to energy in an ecosystem?
As energy flows through ecosystems in food chains and webs,the amount of chemical energy available to organisms at each succeeding feeding level decreases.
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