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【求助】湿地毕业论文的研究方向！
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最近老板接到一个关于湿地典型生态示范区的活，让我们自己定各自的论文题目，现在我很焦急，看了许多文章，写湿地的文章太多了，不知现在湿地的最新研究方向是怎样？希望大家多给我提些建议！ [ Last edited by ewigkeit on 2008-12-2 at 18:53 ] |
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3楼2008-01-07 15:09:28
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外来入侵种对本地植物群落的影响 Biological invasions are recognized as a global phenomenon with serious ecological, economic and social consequences (Drake et al., 1989; Williamson, 1996). Especially in freshwater habitats, exotic plants are particularly common (Parker & Hay, 2005). Some studies show that the presence of exotic plants is negatively affecting the abundance and distribution of native plant species in wetlands (Houlahan & Findlay, 2004). |
5楼2008-01-24 01:29:47
6楼2008-02-05 11:48:15
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