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Forestry 20 Agriculture 13 Ecology 12
Plant Sciences 11 Environmental Sciences 10 Environmental Sciences & Ecology 9
Soil Science 8 Water Resources 7 Geology 4
Agriculture, Multidisciplinary 3 Agriculture/agronomy 3 Agronomy 3
Environment 3 Evolutionary Biology 3 Multidisciplinary Sciences 3
植物学 3 Entomology 2 Geosciences, Multidisciplinary 2
Science & Technology - Other Topics 2 Agricultural Engineering;Agronomy 1 Agronomy; Plant Sciences; Chemistry 1
Agronomy; Plant Sciences; Soil Science 1 Analytical 1 Analytical; Soil Science 1
Biodiversity Conservation 1 Biology 1 Chemistry 1
Earth Sciences 1 Ecology; Environmental Sciences 1 Engineering 1
Environment/ecology 1 Environmental Sciences & Ecology; Engineering 1 Environmental Studies 1
Geosciences, Multidisciplinary; Soil Science 1 Green & Sustainable Science & Technology 1 Marine & Freshwater Biology 1
Meteorology & Atmospheric Sciences 1 This paper presents a study on species diversity and its ecological service function in the plateau area in western Sichuan. The results show that species diversity in the plantations on the cutover land has a tendency to increase and that its ecological service function is to be improved with stand age growing. The species diversity in forest communities is also gradually increased on different succession stage till reaching a climax level. But the species diversity in the climax community is slightly decreased before it reaches a relatively constant status. Ecological service function of diversity is gradually strengthened with the progress of succession. In addition, species diversity in a stand in a similar site and at a same age differs among forest types. Species diversity index within a coniferous and broad-leaved mixed forest is larger than that within a coniferous forest. Meanwhile, species diversity enriches as the tree density increases 1 environmental engineering;ecology and ecosystems;biology;management 1
地理学::自然地理学 1

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