Different inter-annual responses to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing
文献类型：期刊论文
| 作者 | Song, Ming-Hua2,3; Yu, Fei-Hai1; Ouyang, Hua2; Cao, Guang-Min4; Xu, Xing-Liang2; Cornelissen, Johannes H. C.5 |
| 刊名 | global change biology
 |
| 出版日期 | 2012-10-01 |
| 卷号 | 18期号:10页码:3100-3111 |
| 关键词 | aboveground biomass alpine meadow compensatory dynamics long-term experiment niche differentiation species richness |
| ISSN号 | 1354-1013 |
| 中文摘要 | plant species and functional groups in nitrogen (n) limited communities may coexist through strong eco-physiological niche differentiation, leading to idiosyncratic responses to multiple nutrition and disturbance regimes. very little is known about how such responses depend on the availability of n in different chemical forms. here we hypothesize that idiosyncratic year-to-year responses of plant functional groups to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing. we conducted a 6year n addition experiment in an alpine meadow on the tibetan plateau released from grazing by livestock. the experimental design featured three n forms (ammonium, nitrate, and ammonium nitrate), crossed with three levels of n supply rates (0.375, 1.500 and 7.500gnm-2yr-1), with unfertilized treatments without and with light grazing as controls. all treatments showed increasing productivity and decreasing species richness after cessation of grazing and these responses were stronger at higher n rates. although n forms did not affect aboveground biomass at community level, different functional groups did show different responses to n chemical form and supply rate and these responses varied from year to year. in support of our hypothesis, these idiosyncratic responses seemed to enable a substantial diversity and biomass of sedges, forbs, and legumes to still coexist with the increasingly productive grasses in the absence of grazing, at least at low and intermediate n availability regimes. this study provides direct field-based evidence in support of the hypothesis that idiosyncratic and annually varying responses to both n quantity and quality may be a key driver of community structure and species coexistence. this finding has important implications for the diversity and functioning of other ecosystems with spatial and temporal variation in available n quantity and quality as related to changing atmospheric n deposition, land-use, and climate-induced soil warming. |
| 英文摘要 | plant species and functional groups in nitrogen (n) limited communities may coexist through strong eco-physiological niche differentiation, leading to idiosyncratic responses to multiple nutrition and disturbance regimes. very little is known about how such responses depend on the availability of n in different chemical forms. here we hypothesize that idiosyncratic year-to-year responses of plant functional groups to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing. we conducted a 6year n addition experiment in an alpine meadow on the tibetan plateau released from grazing by livestock. the experimental design featured three n forms (ammonium, nitrate, and ammonium nitrate), crossed with three levels of n supply rates (0.375, 1.500 and 7.500gnm-2yr-1), with unfertilized treatments without and with light grazing as controls. all treatments showed increasing productivity and decreasing species richness after cessation of grazing and these responses were stronger at higher n rates. although n forms did not affect aboveground biomass at community level, different functional groups did show different responses to n chemical form and supply rate and these responses varied from year to year. in support of our hypothesis, these idiosyncratic responses seemed to enable a substantial diversity and biomass of sedges, forbs, and legumes to still coexist with the increasingly productive grasses in the absence of grazing, at least at low and intermediate n availability regimes. this study provides direct field-based evidence in support of the hypothesis that idiosyncratic and annually varying responses to both n quantity and quality may be a key driver of community structure and species coexistence. this finding has important implications for the diversity and functioning of other ecosystems with spatial and temporal variation in available n quantity and quality as related to changing atmospheric n deposition, land-use, and climate-induced soil warming. |
| WOS标题词 | science & technology ; life sciences & biomedicine |
| 类目[WOS] | biodiversity conservation ; ecology ; environmental sciences |
| 研究领域[WOS] | biodiversity & conservation ; environmental sciences & ecology |
| 关键词[WOS] | terrestrial ecosystems ; niche complementarity ; nutrient limitation ; plant-communities ; organic nitrogen ; arctic tundra ; deposition ; grasslands ; diversity ; biodiversity |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000308443800011 |
| 公开日期 | 2013-03-15 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/3608]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 作者单位 | 1.Beijing Forestry Univ, Coll Nat Conservat, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China 5.Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Ecol Sci, NL-1081 HV Amsterdam, Netherlands |
| 推荐引用方式 GB/T 7714 | Song, Ming-Hua,Yu, Fei-Hai,Ouyang, Hua,et al. Different inter-annual responses to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing[J]. global change biology,2012,18(10):3100-3111. |
| APA | Song, Ming-Hua,Yu, Fei-Hai,Ouyang, Hua,Cao, Guang-Min,Xu, Xing-Liang,&Cornelissen, Johannes H. C..(2012).Different inter-annual responses to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing.global change biology,18(10),3100-3111. |
| MLA | Song, Ming-Hua,et al."Different inter-annual responses to availability and form of nitrogen explain species coexistence in an alpine meadow community after release from grazing".global change biology 18.10(2012):3100-3111. |
入库方式： OAI收割
来源：西北高原生物研究所
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