Has abundant Blossom out Life CP and SP Water, nutrients late Long lower Energy early short higher Part E：Short essay （30 points total, 15 points each）
1. How do you understand the mono-climax theory of forest succession? 1. one mono-climax population has only one climax-climatic climax.
2. there are some pre-climax population such as soil climax population.
2. Why should we conserve biodiversity?
1. provides a wide array of goods and services、 livelihood and jobs for hundreds of millions of people worldwide
2. has important economic, social and cultural roles in the lives of many indigenous and local communities.
3.Life on Earth as we know it would not be the same if its rich biodiversity were severely altered.
4. Natural beauty and inspiration
习题十答案
Part A: Definitions
1）Trophic level; The successive stages along a trophic chain are called Trophic leve.
2）Ecological efficiency: The ratio of one kind of parameter amongs the trophic levels.
3）Liebig‘s law of minimum: The growth of plant prior to the smallest factor.
4）Important value: The summed index to value the position and impotance
of one specie in the population. 5）Biogeochemical cycle: Refer to a continuing cyclical exchange of chemicals between the biota and the physical environment which in an ecosystem.
6）Forest succession: It refers to the sequence of plant that
successively occupy an area over a period of time, such as the changes that can be observed over the hundred years after the abandonment of a plowed field.
7）Net primary productivity:Net photosynthesis minus respiration loss is defined as NPP.
8）Population: A group of interacting individuals of the same species living in the special space.
9）Mono-climax: The mono-climax theory states that the species composition and structure of the terminal community-the climax-of all series is determined by the regional macroclimate.
10）Biogeography:The subject to research the geographical distribution of biology.
Part B: Multiple choices
1.C 2.C 3.C 4.B 5.A Part C: Fill in blank
1. autotroph、heterotroph 2. 10 3. Gaia 4. pioneer 5. secondary
6. mutualism 7. ectomycorrhiza 8. environmental capacity 9. pyramid
Part D: Short answer
1.Producer、Consumer、Decomposer、Environment 2. CO2 、CH4 、N2O
Part E. Short essay
1.What is the main difference between exponential and logistic growth?
Whether considering of environmental capacity
2.Draw the global water cycle. Be sure to label the pools and fluxes.