Does hydrological fluctuation alter impacts of species richness on biomass in wetland plant communities?
Does hydrological fluctuation alter impacts of species richness on biomass in wetland plant communities?
复制标题
水文波动是否会改变物种丰富度对湿地植物群落生物量的影响
DOI：
10.1093/jpe/rtv065
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发表时间：
2016-08-01
影响因子：
2.7
通讯作者：
Yu, Fei-Hai
中科院分区：
文献类型：
--
作者：
Luo, Fang-Li;Jiang, Xing-Xing;Yu, Fei-Hai
The diversity-productivity relationship is one of the most critical questions in ecology and can be altered by environmental factors. Hydrological fluctuation affects growth of wetland plants, and such effects vary with plant species. Therefore, we hypothesized that hydrological fluctuation changes effects of species richness on productivity of wetland plant communities.We constructed wetland plant communities consisting of three or six wetland plant species and subjected them to hydrological fluctuation (i.e. gradually changing water level) of two frequencies and two ranges, with unchanged water level as the control. We measured height, root and shoot dry mass of each plant at harvest.Hydrological fluctuation significantly decreased biomass of wetland plant communities, which was due to impacts of fluctuation range, but not those of fluctuation frequency. Community biomass was significantly higher when species richness was higher, and such an effect did not depend on hydrological fluctuation. Therefore, hydrological fluctuation can decrease the productivity of wetland plant communities but may not alter the diversity-productivity relationship.
