当前位置: X-MOL 学术Biol. Invasions › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Phytophthora and vascular plant species distributions along a steep elevation gradient
Biological Invasions ( IF 2.9 ) Pub Date : 2021-01-05 , DOI: 10.1007/s10530-020-02450-y
Ihsanul Khaliq , Treena I. Burgess , Giles E. St. J. Hardy , Diane White , Keith L. McDougall

A diverse Phytophthora community was detected in recent surveys conducted in alpine and subalpine areas, previously considered Phytophthora free. The current study was conducted to determine patterns of Phytophthora species richness and distribution along a steep elevation gradient, and to compare these patterns with those of vascular plant species. Phytophthora and vascular plant species were recorded over a wide range of elevation gradient (410–2125 m) and across a disturbance boundary. Vascular plant species exhibited a monotonic decline with increasing elevation. With the exception of native Phytophthora species isolated by baiting, Phytophthora species richness was invariant in relation to elevation and had higher elevational ranges than vascular plant species. Vascular plants occurred in discrete plant communities with introduced species more frequently recorded in road habitat and native species more frequently recorded in natural vegetation habitat. Both native and introduced Phytophthora species occurred with equal frequency in road and natural vegetation habitat. Phytophthora species were absent from one-third of sample plots and plots with no Phytophthora species were randomly distributed across landscapes. Only two Phytophthora species repeatedly occurred with a particular plant community. Our findings show that Phytophthora species are habitat generalists, being widely distributed across elevation and disturbance gradients, while vascular plant species are mostly habitat specialists, being confined to particular environments within narrow elevation bands. The effect of Phytophthora species on vascular plant species is largely unknown but the fact that Phytophthora species are already present throughout the elevation and disturbance gradients warrants closer examination of plant-pathogen relationships.



中文翻译:

疫霉菌和维管植物的物种分布沿陡峭的海拔梯度

最近在高寒和亚高山地区进行的调查中发现了一个多样化的疫霉菌群落,以前认为疫霉菌。当前的研究是为了确定疫霉菌物种丰富度和分布沿陡峭的海拔梯度的模式,并将这些模式与维管植物物种的模式进行比较。疫霉菌和维管植物物种在大范围的海拔梯度(410–2125 m)和扰动边界上被记录下来。维管植物物种随着海拔的升高表现出单调下降。除了通过诱饵分离的本地疫霉属物种之外,疫霉属物种丰富度与海拔高度无关,并且海拔高度范围比维管植物物种高。维管束植物分布在离散的植物群落中,引入的物种在道路生境中记录得更多,而在自然植被的生境中记录得更多。原生疫霉和外来疫霉在公路和自然植被生境中的发生频率均相等。物种缺席从三分之一样地和情节没有的疫霉属物种跨越景观被随机分布的。在特定的植物群落中仅重复出现了两个疫霉属物种。我们的发现表明疫霉菌物种是栖息地的通才,广泛分布在海拔和扰动梯度上,而维管植物物种则主要是栖息地的专家,仅限于狭窄的海拔范围内的特定环境。疫霉菌种对维管植物的影响尚不清楚,但疫霉菌种在整个海拔和扰动梯度中已经存在,这一事实值得对植物与病原体的关系进行更仔细的研究。

更新日期:2021-01-05
down
wechat
bug