Extreme drought shifts phosphorus-related leaf trait relationships without clearly altering pairwise scaling in grasslands

IF 6.3 1区 环境科学与生态学 Q1 ECOLOGY
Hongqiang Wang, Yuguang Ke, Honghui Wu, Ying Li, Chong Xu, Wentao Luo, Xiaoan Zuo, Nianpeng He, Yushu Zhang, Robert J. Griffin-Nolan, Qiang Yu
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引用次数: 0

Abstract

极端干旱改变了与磷相关的叶片性状关系,但没有明显改变草原的成对缩放
叶片性状关系有助于我们理解植物的适应性和生态系统功能。随着气候变化导致极端环境条件的频率和强度增加,这些关系可能会改变。然而,这些关系对极端干旱压力的敏感性仍不清楚。为了解决这一差距,我们在内蒙古的六个草原上进行了极端干旱实验(生长期降水减少66%),包括沙漠草原、典型草原和草甸草原。对32种草本植物在干旱和环境条件下的比叶面积(SLA)、叶片氮(N质量)和叶片磷(P质量)进行了测量,并探讨了它们的成对关系的潜在变化。我们还评估了物种水平的成对可塑性,以揭示任何变化背后的机制。在两种环境条件下,N质量-SLA、P质量-SLA和P质量-N质量之间的异速生长关系持续存在。虽然极端干旱没有改变这些关系的斜率,但它显著降低了P质量与SLA和N质量之间关系的高度(截距)。统计上相似的坡度与物种水平的两两可塑性模式有关,而物种之间没有系统的差异,而海拔的下降与大多数地点物种水平磷浓度的降低有关。合成。这些结果表明,极端干旱主要改变了与磷相关的叶片性状关系,而不是为SLA、叶片氮和叶片磷之间的成对标度变化提供了强有力的证据。这些发现强调了磷相关性状响应和物种水平可塑性对于理解严重水分胁迫下叶片经济性状模式的重要性。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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