近日,，中科院華南植物園科學(xué)家揭示了全球生物多樣性沿海拔變化格局,。研究結(jié)果日前發(fā)表于《自然》子刊《科學(xué)—報告》,。
據(jù)介紹,，該植物園生態(tài)及環(huán)境科學(xué)研究中心研究員任海帶領(lǐng)兩位學(xué)生與美國農(nóng)業(yè)部林業(yè)署研究員郭勤峰等合作，收集了全球443篇關(guān)于生物多樣性沿海拔梯度變化的論文,，在全球尺度上分南半球和北半球?qū)ι锒鄻有匝睾０翁荻茸兓母窬诌M行了研究,。
結(jié)果發(fā)現(xiàn)，大多數(shù)地點山腰稍低的部位生物多樣性最高,。山越高,，其植物、動物和微生物等類群沿海拔變化的單峰曲線越相近,。雖然南半球與北半球的生物多樣性沿海拔變化格局相似,，但也有些不同，正是這些不同反映了兩個半球上陸地和山區(qū)配置的不同,。植物,、動物和微生物等不同類群在不同海拔出現(xiàn)多樣性峰值則表明了物理環(huán)境和生物自身因素的限制作用。(生物谷Bioon.com)
生物谷推薦的英文摘要
Scientific Reports doi:10.1038/srep03007
Global variation in elevational diversity patterns
Qinfeng Guo,Douglas A. Kelt,Zhongyu Sun,Hongxiao Liu,Liangjun Hu,Hai Ren & Jun Wen
While horizontal gradients of biodiversity have been examined extensively in the past, vertical diversity gradients (elevation, water depth) are attracting increasing attention. We compiled data from 443 elevational gradients involving diverse organisms worldwide to investigate how elevational diversity patterns may vary between the Northern and Southern hemispheres and across latitudes. Our results show that most elevational diversity curves are positively skewed (maximum diversity below the middle of the gradient) and the elevation of the peak in diversity increases with the elevation of lower sampling limits and to a lesser extent with upper limit. Mountains with greater elevational extents, and taxonomic groups that are more inclusive, show proportionally more unimodal patterns whereas other ranges and taxa show highly variable gradients. The two hemispheres share some interesting similarities but also remarkable differences, likely reflecting differences in landmass and mountain configurations. Different taxonomic groups exhibit diversity peaks at different elevations, probably reflecting both physical and physiological constraints.
