Thylacospermum caespitosum population structure and cushion species community diversity along an altitudinal gradient | |
Ruiming Zhao(赵锐明)2; Hua Zhang(张华)1; Lizhe An(安黎哲)1 | |
刊名 | Environmental Science and Pollution Research |
2018 | |
期号 | 25页码:28998-29005 |
关键词 | Cushion Plant Species Pool Size Structure Mortality Rate Α-diversity |
ISSN号 | 0944-1344 |
DOI | 10.1007/s11356-018-2893-2 |
英文摘要 | As alpine plants, cushion species are particularly susceptible to environment changes. Thus, understanding population structure and community diversity variation of cushion plants along elevational gradients is crucial for estimating their response to predicted climate changes. In this study, Thylacospermum caespitosum populations from three elevations (low, medium, and high) in three climate zones of China (the Kunlun, Qilian, and Tianshan Mountains) were selected to evaluate the effect of elevation on the structure of T. caespitosum populations and species diversity of cushion communities. Results showed that elevation substantially influenced T. caespitosum populations (size structure, density, and death rate), as well as richness (α-diversity) and microhabitat species pool (species pool) of cushion communities. In the low elevations, T. caespitosum populations were in decline due to a lower ratio of small plants and higher mortality compared with populations at medium and high elevations. The α-diversity and species pool in cushion communities were significantly increased with decreased elevation, but the importance value of T. caespitosum decreased accordingly. Moreover, there was a significant positive orrelation between elevation and relative importance value (the importance of one species in the community) of T. caespitosum (r = 0.883; P < 0.01). Elevation was significantly negatively correlated with the mortality rate of T. caespitosum (r = - 0.855; P < 0.01), α-diversity (r - 0.933; P < 0.001), and species pool (r = - 0.885; P < 0.01). The declining characters of T. caespitosum population structure were obvious in low elevation populations. This decline may directly or indirectly relate to environmental change. Effects of elevation can provide an early indication of range contractions and population declines of cushion species with future climate warming. We call for more mechanistic studies of climate change impacts on cushion populations, particularly in alpine systems near the snow line. |
学科主题 | 植物化学生态研究 |
语种 | 英语 |
出版者 | Springer (part of Springer Nature) |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/24717] |
专题 | 兰州化学物理研究所_中科院西北特色植物资源化学重点实验室/甘肃省天然药物重点实验室 |
通讯作者 | Ruiming Zhao(赵锐明) |
作者单位 | 1.MOE Key Laboratory of Cell Activities and Stress Adaptations 2.CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences, Lanzhou 730000, China |
推荐引用方式 GB/T 7714 | Ruiming Zhao,Hua Zhang,Lizhe An. Thylacospermum caespitosum population structure and cushion species community diversity along an altitudinal gradient[J]. Environmental Science and Pollution Research,2018(25):28998-29005. |
APA | Ruiming Zhao,Hua Zhang,&Lizhe An.(2018).Thylacospermum caespitosum population structure and cushion species community diversity along an altitudinal gradient.Environmental Science and Pollution Research(25),28998-29005. |
MLA | Ruiming Zhao,et al."Thylacospermum caespitosum population structure and cushion species community diversity along an altitudinal gradient".Environmental Science and Pollution Research .25(2018):28998-29005. |
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