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

文献类型： 外文期刊

第一作者： Zhou, C.

作者： Zhou, C.;Liu, J.;Yang, Y. G.;Sun, Y.;Fang, Y. Z.;Zhang, Q. Q.;Zhou, Y. B.;Wang, Y. N.;Zhou, C.;Yang, Y. F.;Busso, C.;Zhou, Y. B.;Wang, Y. N.;Zhang, Z.;Zhang, Z.;Wang, Z. W.

作者机构：

关键词： Productivity;Species diversity;Climate;Grasslands

期刊名称：PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：1.039； 五年影响因子：0.77 ）

ISSN： 1851-5657

年卷期： 2016 年 85 卷

页码：

收录情况： SCI

摘要： The objective of this study was to analyze the relationships between total aboveground plant biomass versus altitude, latitude, longitude, mean annual temperature, mean annual precipitation, and species diversity. Simple linear regression analysis was used to study these relationships. Results showed that altitude was significantly, positively (R-2=0.038, P<0.01) related with total plant aboveground biomass. Meanwhile, when longitude (R-2=0.124, P<0.001) and latitude (R-2=0.221, P<0.001) increased, total aboveground biomass decreased. The relationship between biomass and mean annual precipitation was significantly, positively linear (R-2=0.149, P<0.001). Mean annual temperature was significantly, negatively correlated with biomass (R-2=0.145, P<0.001). The relationship between species diversity and biomass was significant, but relatively weaker (i.e., R-2<0.063, P<0.05) compared with those for the climatic variables. This is, species diversity explained less than 7% of the total variability in total aboveground plant biomass. This result agrees with the idiosyncratic response hypothesis which suggests that ecosystem function changes when species diversity changes, but the magnitude and direction of these changes are unpredictable because the roles of individual plant species are complex and varied.

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