ecosystem英语presentation例析.ppt

Ecosystem 生态系统 By Jane Contents Definition Component Nutrition Structure Classification What is ecosystem？ Definition An ecosystem is a biological environment consisting of all the organisms living in a particular area, as well as all the nonliving, physical components of the environment with which the organisms interact, such as air, soil, water and sunlight. It is all the organisms in a given area, along with the nonliving (abiotic) factors with which they interact; a biological community and its physical environment. the basic component of ecosystem nonliving environment (abiotic component) Energy：solar energy and other energies Climate： sunlight，temperature，rainfall，wind，etc. Matrix and media（基质和介质）： rock，soil，water，air，etc. Material metabolism： ；mineral salts ； carbohydrate，protein，fat，humus.（腐殖质） the basic component of ecosystem all the organisms (biotic component) Producers Producers are those organisms that can build up foods from inorganic materials, i. e. green plants, algae, and photosynthetic and chemosynthetic bacteria. Green plants, photosynthetic bacteria, chemosynthetic bacteria the basic component of ecosystem all the organisms (biotic component) 2. Consumers herbivore（食草动物）: primary consumers carnivore/predator（食肉动物）: secondary consumers and the tertiary consumers omnivore（杂食动物）: detritus?consumers （腐质消费者;?碎屑消费者?） 3. Decomposers microorganism/microbe（微生物）（bacterium【pl.bacteria】 and fungus【pl. fungi/funguses】） protozoan/protozoa （原生动物） small invertebrates （小型无脊椎动物） basic component of ecosystem the all the organisms (biotic component) 2. Consumers herbivore（食草动物）: primary consumers carnivore/predator（食肉动物）: secondary consumers and the tertiary consumers omnivore（杂食动物）: detritus?consumers （腐质消费者;?碎屑消费者?） 3. decomposers microorganism/microbe（微生物）（bacterium【pl.bacteria】 and fungus【pl. fungi/funguses】） protozoan/protozoa （原生动物） small invertebrates （小型无脊