摘要
为了深入了解森林群落物种多度分布格局在纬度梯度上的分布特征,以位于21°~42°N纬度范围内的4个具有代表性的森林群落为研究对象,采用纯统计、中性理论和生态位理论三类物种多度分布模型进行拟合优度检验,结合群落多样性的变化特征进一步分析,结果表明:在此纬度梯度上,各森林群落中α多样性均随纬度升高逐渐减小;在种多度模型拟合方面并未显示出纬度梯度上的差异,结果均为中性理论模型中的复合群落零和多项式模型的拟合效果最优;随纬度上升,群落中常见种和稀有种物种数均逐渐减少,稀有种种多度分布拟合结果与整体群落种多度分布最优模型一致,而常见种种多度分布拟合结果则显示出生态位理论模型中的断棍模型效果更优。热带雨林群落中的稀有种比例较高,当受到干扰时更容易造成物种的丧失,从而具有更高的保护价值。
The study of species abundance in forest community can not only reveal the maintenance mechanism of community biodiversity,but also provide theoretical basis for biodiversity conservation.In order to have an in-depth understanding of the distribution characteristics of species abundance patterns in forest communities along the latitude gradient,four representative forest communities within the latitude range of 21°-42°N were selected.Species abundance distribution models based on pure statistics,neutral diversity theory and niche theory were adopted for fitting analysis,and further analysis was carried out in combination with the change characteristics of community diversity.The results showed thatαdiversity in each forest community decreased with the increase of latitude at this latitude gradient.In terms of species abundance model fitting,there was no difference in latitude gradient,and the fitting results showed that the metacommunity zero-sum multinomial distribution model in the neutral biodiversity theory had the best fitting effect.With the increase of latitude,the number of common and rare species in the community decreased gradually.The fitting results of rare species abundance distribution were consistent with the optimal community species abundance distribution model,while the fitting results of common species abundance distribution showed that the broken stick model in the niche theory had a better fitting effect.The proportion of rare species in tropical rainforest community is higher,which is more likely to cause species loss when disturbed,and thus has higher conservation value.
作者
刘玥
杨欣
贾珺婷
张志明
林露湘
谭正洪
LIU Yue;YANG Xin;JIA Junting;ZHANG Zhiming;LIN Luxiang;TAN Zhenghong(School of Ecology and Environment,Hainan University,Haikou,Hainan 570228,China;School of Ecology and Environment,Yunnan University,Kunming,Yunnan 650504,China;Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming,Yunnan 650201,China)
出处
《热带生物学报》
2023年第3期307-319,共13页
Journal of Tropical Biology
关键词
纬度梯度
群落多样性
种多度分布模型
latitudinal gradient
community diversity
species abundance distribution model
