Total aboveground plant biomass is more strongly affected by climate than species diversity on a grassland in Liaoning, China

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2016-06-22 DOI:10.32604/phyton.2016.85.125

Chan Zhou, C. Busso, J. Liu, Yg Yang, Y. Sun, Y. Fang, Q. Zhang, Yb Zhou, Yn Wang, Z. Zhang, Zhengwen Wang, Yf Yang

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引用次数: 2

Abstract

The objective of this study was to analyze the relationshipsbetween total aboveground plant biomass versus altitude, latitude,longitude, mean annual temperature, mean annual precipitation,and species diversity. Simple linear regression analysis was usedto study these relationships. Results showed that altitude was significantly,positively (R2= 0.038, P<0.01) related with total plant abovegroundbiomass. Meanwhile, when longitude (R2= 0.124, P<0.001)and latitude (R2= 0.221, P<0.001) increased, total aboveground biomassdecreased. The relationship between biomass and mean annualprecipitation was significantly, positively linear (R2= 0.149, P<0.001).Mean annual temperature was significantly, negatively correlatedwith biomass (R2= 0.145, P<0.001). The relationship between speciesdiversity and biomass was significant, but relatively weaker (i.e.,R2<0.063, P<0.05) compared with those for the climatic variables.This is, species diversity explained less than 7% of the total variabilityin total aboveground plant biomass. This result agrees with theidiosyncratic response hypothesis which suggests that ecosystem functionchanges when species diversity changes, but the magnitude anddirection of these changes are unpredictable because the roles of individualplant species are complex and varied.

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气候对辽宁某草地地上植物生物量的影响比对物种多样性的影响更大

本研究的目的是分析海拔高度、经纬度、年平均气温、年平均降水量和物种多样性与地上植物总生物量的关系。采用简单的线性回归分析来研究这些关系。结果表明，海拔高度与植物地上总生物量呈极显著正相关(R2= 0.038, P<0.01)。同时，随着经度(R2= 0.124, P<0.001)和纬度(R2= 0.221, P<0.001)的增加，地上总生物量减少。生物量与年平均降水量呈显著的正线性关系(R2= 0.149, P<0.001)。年平均气温与生物量呈显著负相关(R2= 0.145, P<0.001)。物种多样性与生物量的关系显著，但与气候变量的关系相对较弱(R2<0.063, P<0.05)。也就是说，物种多样性对地上植物生物量总变异的解释不足7%。这一结果与物种多样性变化时生态系统功能发生变化的特质响应假说一致，但由于单个植物物种的作用是复杂多变的，因此这些变化的幅度和方向是不可预测的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.