The relationship between nutrient availability, shoot biomass and species richness in grassland and wetland communities
The relationship between nutrient availability, shoot biomass and species richness in grassland and wetland communities
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DOI：
10.1007/bf00043032
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发表时间：
1983-09
期刊：
影响因子：
--
通讯作者：
J. Vermeer;F. Berendse
中科院分区：
文献类型：
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作者：
J. Vermeer;F. Berendse
研究了林分生物量、土壤养分浓度和单位面积林分种数之间的关系。这项研究是在荷兰的两个不同地区进行的，分别是Gelderse Vallei（阿默斯福特东部）和Westbroekse Zodden（乌得勒支西北部）。采集了4个系列的植被和土壤样本：草地和湿地群落的1个系列、草地群落的1个系列、沼泽群落的1个系列和仅一个湿地群落的1个系列。这两个序列在草地群落中表现为地上部生物量与物种数量呈负相关，与土壤养分浓度呈正相关。而在沼泽群落中，物种数量与地上部生物量呈正相关，地上部生物量与养分浓度呈负相关。仅在一个湿地群落中采集的一系列样品，其茎部生物量与物种数量的关系呈现出最优曲线。结果表明：在所研究的植物群落中，低产量水平（< 400 ~ 500 g/m2）下，单位面积物种丰富度随生产力的增加而增加，高产量水平（> ~ 500 g/m2）下，单位面积物种丰富度随生产力的增加而减少。
The relationship was studied between shoot biomass, nutrient concentration in the soil and number of species per unit area. The study was carried out in two different parts of the Netherlands, the Gelderse Vallei (east of Amersfoort) and the Westbroekse Zodden (northwest of Utrecht). Four series of vegetation and soil samples were taken: one series in grassland and wetland communities, one series in grassland communities, one series in fen communities and one series in only one wetland community.The two series in grassland communities show a negative correlation between shoot biomass and species number and a positive correlation between shoot biomass and nutrient concentration in the soil. The opposite was found in the series in the fen communities: there was a positive correlation between species number and shoot biomass and a negative correlation between shoot biomass and nutrient concentrations. The series of samples that had been taken in only one wetland community showed an optimum curve for the relation between shoot biomass and number of species. It is concluded that in the plant communities studied the species richness per unit area increases with increasing productivity at low production levels (< 400–500 g/m2) and decreases with increasing productivity at higher production levels (> 400–500 g/m2).