Richness–biomass relationships change with increasing acid rain intensity by shifting from positive to negative selection
Richness–biomass relationships change with increasing acid rain intensity by shifting from positive to negative selection
复制标题
丰富度与生物量的关系随着酸雨强度的增加而变化，从正选择转向负选择
DOI：
10.1016/j.ecolind.2022.109610
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发表时间：
2022-12
影响因子：
6.9
通讯作者：
Wang X Y
中科院分区：
文献类型：
--
作者：
Gao S;Chen Y Q;Li Y J;Qu M M;Chen T;Yan Q D;Wang J;Wang X Y
物种间的相互作用会受到环境胁迫的影响，然而，这种变化如何影响植物物种丰富度-生物量关系尚不清楚。在这里，实验植物群落的物种丰富度水平为1，2，4，和8组装和模拟酸雨（SAR）强度梯度（pH 7.0，4.5和2.5）。研究了物种丰富度与生物量的关系，并测定了各SAR强度下的绝对生长率和存活率。随着SAR强度的增加，物种丰富度-生物量关系由正向负转变，这是生物多样性效应由正向负选择转变的结果。在pH 7.0的SAR强度下，绝对生长速率决定了混合物中物种的生物量比率。包括佛甲草（快速增长）的混合物有较低的土壤总氮（TN），土壤总磷（TP），和更大的地上生物量比混合物，不包括该物种，这导致了积极的选择效果。在pH2.5的SAR强度下，存活率决定了混合物中物种的生物量比例。混合物，其中包括景天emperyatumandPhedimusspurius（具有较高的存活率）有较少的地上生物量比混合物，不包括他们，这导致了负面的选择效果。我们的研究结果表明，植物获得竞争优势的机制（即，从快速增长转向高存活率）将影响生物多样性效应。考虑到未来的气候变化情景，我们建议，在竞争机制的变化应纳入未来的研究植物多样性和生态系统功能之间的关系。
The species interactions can be affected by environmental stress; however, how such change affects the plant species richness–biomass relationship is still unclear. Here, experimental plant communities with species richness levels of 1, 2, 4, and 8 were assembled and subjected to a simulated acid rain (SAR) intensity gradient (pH 7.0, 4.5 and 2.5). The species richness–biomass relationship was investigated and the absolute growth rate and survival rate were measured under each SAR intensity. With the increasing SAR intensity, the species richness–biomass relationships changed from positive to negative as a result of a shift in the biodiversity effects from positive to negative selection. Under a SAR intensity of pH 7.0, the absolute growth rate determined the biomass ratio of species in the mixtures. Mixtures that includedSedum lineare(with rapid growth) had a lower soil total nitrogen (TN), soil total phosphorus (TP), and greater aboveground biomass than mixtures that did not include the species, which led to a positive selection effect. Under a SAR intensity of pH 2.5, the survival rate determined the biomass ratio of species in the mixtures. Mixtures that includedSedum emarginatumandPhedimus spurius(with high survival rates) had less aboveground biomass than mixtures that did not include them, which led to a negative selection effect. Our results indicated that the mechanism by which a plant gains competitive superiority (i.e., a shift from rapid growth to a high survival rate) in response to environmental stress will affect the biodiversity effect. Considering future climate change scenarios, we suggest that changes in the competition mechanism should be integrated into future studies of the relationship between plant diversity and ecosystem functioning.
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影响因子：
8.8
作者：
Iva Špaèková;J. Lepš
通讯作者：
Iva Špaèková;J. Lepš
DOI：
10.1073/pnas.111055298
发表时间：
2001-06-05
影响因子：
11.1
作者：
Mulder, CPH;Uliassi, DD;Doak, DF
通讯作者：
Doak, DF
影响因子：
2.7
作者：
Markus S. Germany;H. Bruelheide;Alexandra Erfmeier
通讯作者：
Markus S. Germany;H. Bruelheide;Alexandra Erfmeier
影响因子：
2.9
作者：
Nan-nan Shi;Cheng Gao;Yong Zheng;Liang-Dong Guo
通讯作者：
Nan-nan Shi;Cheng Gao;Yong Zheng;Liang-Dong Guo
DOI：
10.1890/10-1201.1
发表时间：
2011-07
期刊：
Ecological applications : a publication of the Ecological Society of America
影响因子：
--
作者：
A. Wolf;C. Field;J. Berry
通讯作者：
A. Wolf;C. Field;J. Berry