Impacts of nitrogen deposition on terrestrial plant diversity: a meta-analysis in China
Impacts of nitrogen deposition on terrestrial plant diversity: a meta-analysis in China
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DOI：
10.1093/jpe/rtz036
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发表时间：
2019-12-01
影响因子：
2.7
通讯作者：
Ni, Jian
中科院分区：
文献类型：
--
作者：
Han, Wen-Juan;Cao, Jia-Yu;Ni, Jian
目的随着全球大气氮沉降的增加，氮沉降对陆地植物多样性的影响得到了广泛的研究。一些研究综述了氮沉降对植物物种多样性的影响，但所有研究都集中在特定生态系统中物种丰富度对植物群落的影响。有必要进行系统的荟萃分析，涵盖多个气候带和生态系统类型中植物多样性的多个层面。我们的目标是量化不同环境和实验环境中植物群落物种丰富度、均匀度和不确定性的变化。方法我们对发表在中英文期刊上的623条实验记录进行了荟萃分析，以评估陆生植物多样性对中国实验氮素添加的响应。采用物种丰富度(SR)、均匀度(Pielou指数)不确定性(Shannon指数)三个指标对物种多样性的变化进行量化。结果表明：(1)施氮量对温带、高原和亚热带的物种丰富度(SR)、Shannon指数和Pielou指数无显著影响；(Ii)施氮量降低了草地的物种丰富度、Shannon指数和Pielou指数，且林地对物种丰富度的负面影响大于草地；(Iii)从长期来看，施氮量对植物多样性(SR、Shannon指数和Pielou指数)有负面影响，但在短期内对植物多样性没有显著影响。(4)硝酸铵(NH_4NO_3)的负效应大于尿素(CO(NH_2)(2))的负效应，但对Pielou指数的负效应弱于CO(NH_2)(2)的负效应。结果表明，施氮量对植物多样性的影响因气候带、生态系统类型、施氮量、施氮量和试验时间的不同而不同。这突显了将植物多样性的多个维度和多种因素纳入对全球环境变化的植物多样性评估的重要性。
AimsWith the global atmospheric nitrogen (N) deposition increasing, the effect of N deposition on terrestrial plant diversity has been widely studied. Some studies have reviewed the effects of N deposition on plant species diversity; however, all studies addressed the effects of N deposition on plant community focused on species richness in specific ecosystem. There is a need for a systematic meta-analysis covering multiple dimensions of plant diversity in multiple climate zones and ecosystems types. Our goal was to quantify changes in species richness, evenness and uncertainty in plant communities in response to N addition across different environmental and experimental contexts.MethodsWe performed a meta-analysis of 623 experimental records published in English and Chinese journals to evaluate the response of terrestrial plant diversity to the experimental N addition in China. Three metrics were used to quantify the change in plant diversity: species richness (SR), evenness (Pielou index) uncertainty (Shannon index).Important FindingsResults showed that (i) N addition negatively affected SR in temperate, Plateau zones and subtropical zone, but had no significant effect on Shannon index in subtropical zones; (ii) N addition decreased SR, Shannon index and Pielou index in grassland, and the negative effect of N addition on SR was stronger in forest than in grassland; (iii) N addition negatively affected plant diversity (SR, Shannon index and Pielou index) in the long term, whereas it did not affect plant diversity in the short term. Furthermore, the increase in N addition levels strengthened the negative effect of N deposition on plant diversity with long experiment duration; and (iv) the negative effect of ammonium nitrate (NH4NO3) addition on SR was stronger than that of urea (CO(NH2)(2)) addition, but the negative effect of NH4NO3 addition on Pielou index was weaker than that of CO(NH2)(2) addition. Our results indicated that the effects of N addition on plant diversity varied depending on climate zones, ecosystem types, N addition levels, N type and experiment duration. This underlines the importance of integrating multiple dimensions of plant diversity and multiple factors into assessments of plant diversity to global environmental change.