Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15329 |
Diversity‐dependent soil acidification under nitrogen enrichment constrains biomass productivity | |
Kaitlin Kimmel; George N. Furey; Sarah E. Hobbie; Forest Isbell; David Tilman; Peter B. Reich | |
2020-09-18 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | In most plant communities, the net effect of nitrogen enrichment is an increase in plant productivity. However, nitrogen enrichment also has been shown to decrease species richness and to acidify soils, each of which may diminish the long‐term impact of nutrient enrichment on productivity. Here we use a long‐term (20 year) grassland plant diversity by nitrogen enrichment experiment in Minnesota, United States (a subexperiment within the BioCON experiment) to quantify the net impacts of nitrogen enrichment on productivity, including its potential indirect effects on productivity via changes in species richness and soil pH over an experimental diversity gradient. Overall, we found that nitrogen enrichment led to an immediate positive increment in productivity, but that this effect became nonsignificant over later years of the experiment, with the difference in productivity between fertilized and unfertilized plots decreasing in proportion to nitrogen addition‐dependent declines in soil pH and losses of plant diversity. The net effect of nitrogen enrichment on productivity could have been 14.5% more on average over 20 years in monocultures if not for nitrogen‐induced decreases in pH and about 28.5% more on average over 20 years in 16 species communities if not for nitrogen‐induced species richness losses. Together, these results suggest that the positive effects of nutrient enrichment on biomass production can diminish in their magnitude over time, especially because of soil acidification in low diversity communities and especially because of plant diversity loss in initially high diversity communities. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/295269 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Kaitlin Kimmel,George N. Furey,Sarah E. Hobbie,等. Diversity‐dependent soil acidification under nitrogen enrichment constrains biomass productivity[J]. Global Change Biology,2020. |
APA | Kaitlin Kimmel,George N. Furey,Sarah E. Hobbie,Forest Isbell,David Tilman,&Peter B. Reich.(2020).Diversity‐dependent soil acidification under nitrogen enrichment constrains biomass productivity.Global Change Biology. |
MLA | Kaitlin Kimmel,et al."Diversity‐dependent soil acidification under nitrogen enrichment constrains biomass productivity".Global Change Biology (2020). |
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