Linking grazing response of species abundance to functional traits in the Tibetan alpine meadow
Linking grazing response of species abundance to functional traits in the Tibetan alpine meadow
复制标题
将西藏高寒草甸物种丰度的放牧响应与功能性状联系起来
DOI：
10.1007/s11104-009-0194-8
复制
发表时间：
2010-05-01
期刊：
影响因子：
4.9
通讯作者：
Du, Guozhen
中科院分区：
文献类型：
--
作者：
Niu, Kechang;Zhang, Shiting;Du, Guozhen
植物功能性状能否预测物种丰度的放牧响应，是一个尚未在特定生态系统中验证的挑战。我们的目的是研究放牧对物种的响应，并测试放牧和对照生境中物种丰度的响应与功能性状之间的关系。结果表明：1)在物种相对丰度和饱和高度（成年个体最大高度）方面，大多数组成物种对适度放牧的响应显著降低，且影响在物种间和功能群间存在差异；ii)物种丰度的响应与饱和高度呈显著负相关，与比叶面积和种子大小不相关。结果表明，功能性状可以预测放牧对物种丰度的响应方向，但不能很好地预测放牧对物种丰度的响应程度。
Whether grazing response of species abundance can be predicted by plant functional trait remains a challenge untested in a specific ecosystem. We measured species abundance and relevant functional traits for 30 common component species in a moderately grazed and a control community over 3 years (2005, 2006 and 2007) in aKobresia capillifoliadominated alpine meadow on the Tibetan Plateau. Our objective was to examine species response to grazing and to test the relationship between the response of species abundance and functional traits in grazed and control habitats. Our results showed: i) in terms of species relative abundance and saturated height (the maximum height of an adult individual), most component species significantly decrease in response to moderate grazing and the effect differed among species and between functional groups. ii) The response of species abundance was significantly negatively correlated with saturated height, but not correlated with specific leaf area or seed size. We concluded that the response direction of species abundance to grazing can be predicted by functional traits, whereas it is a weak predictor of the extent of grazing response in species abundance.