Nitrogen deposition and plant biodiversity: past, present, and future
Nitrogen deposition and plant biodiversity: past, present, and future
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DOI：
10.1002/fee.1528
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发表时间：
2017-09
影响因子：
10.3
通讯作者：
R. Payne;N. Dise;C. Field;A. Dore;S. Caporn;2. CarlyJ;Stevens
中科院分区：
文献类型：
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作者：
R. Payne;N. Dise;C. Field;A. Dore;S. Caporn;2. CarlyJ;Stevens
来自密集的农业和工业活动的活性氮（N）沉积已被确定为继土地利用和气候变化之后对全球陆地生物多样性的第三大威胁。虽然氮沉降的影响被广泛承认，但其程度却很难量化。我们结合联合收割机氮沉降模型、经验响应函数和植被制图，以英国岛为案例研究，模拟了1900年至2030年氮沉降对植物物种丰富度的影响。我们发现，目前的物种丰富度值-平均在五个广泛的栖息地类型-约三分之一，比没有N沉积。我们的研究结果表明，目前预期的减排将实现不超过适度增加物种丰富度，到2030年，和基于特定生境的“临界负荷”的减排可能是一个效率低下的方法来管理氮沉积的植物生物多样性的保护。氮沉降对生物多样性的影响是严重的，不太可能迅速逆转。
Reactive nitrogen (N) deposition from intensive agricultural and industrial activity has been identified as the third greatest threat to global terrestrial biodiversity, after land-use and climate change. While the impacts of N deposition are widely acknowledged, their magnitude is poorly quantified. We combine N deposition models, empirical response functions, and vegetation mapping to simulate the effects of N deposition on plant species richness from 1900 to 2030, using the island of Great Britain as a case study. We find that current species richness values – when averaged across five widespread habitat types – are approximately one-third less than without N deposition. Our results suggest that currently expected reductions in emissions will achieve no more than modest increases in species richness by 2030, and that emissions cuts based on habitat-specific “critical loads” may be an inefficient approach to managing N deposition for the protection of plant biodiversity. The effects of N deposition on biodiversity are severe and are unlikely to be quickly reversed.