Predicting invasion in grassland ecosystems: is exotic dominance the real embarrassment of richness?
文献类型：期刊论文
| 作者 | Seabloom, Eric W.1; Borer, Elizabeth T.1; Buckley, Yvonne2; Cleland, Elsa E.3; Davies, Kendi4; Firn, Jennifer5; Harpole, W. Stanley6; Hautier, Yann1,7; Lind, Eric1; Macdougall, Andrew8 |
| 刊名 | global change biology
 |
| 出版日期 | 2013-12-01 |
| 卷号 | 19期号:12页码:3677-3687 |
| ISSN号 | 1354-1013 |
| 通讯作者 | seabloom, ew (reprint author), univ mn, dept ecol evolut & behav, st paul, mn 55108 usa. |
| 中文摘要 | invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. however, global-scale tests of this assumption have been elusive because of the focus on exotic species richness, rather than relative abundance. this is problematic because low invader richness can indicate invasion resistance by the native community or, alternatively, dominance by a single exotic species. here, we used a globally replicated study to quantify relationships between exotic richness and abundance in grass-dominated ecosystems in 13 countries on six continents, ranging from salt marshes to alpine tundra. we tested effects of human land use, native community diversity, herbivore pressure, and nutrient limitation on exotic plant dominance. despite its widespread use, exotic richness was a poor proxy for exotic dominance at low exotic richness, because sites that contained few exotic species ranged from relatively pristine (low exotic richness and cover) to almost completely exotic-dominated ones (low exotic richness but high exotic cover). both exotic cover and richness were predicted by native plant diversity (native grass richness) and land use (distance to cultivation). although climate was important for predicting both exotic cover and richness, climatic factors predicting cover (precipitation variability) differed from those predicting richness (maximum temperature and mean temperature in the wettest quarter). herbivory and nutrient limitation did not predict exotic richness or cover. exotic dominance was greatest in areas with low native grass richness at the site- or regional-scale. although this could reflect native grass displacement, a lack of biotic resistance is a more likely explanation, given that grasses comprise the most aggressive invaders. these findings underscore the need to move beyond richness as a surrogate for the extent of invasion, because this metric confounds monodominance with invasion resistance. monitoring species' relative abundance will more rapidly advance our understanding of invasions. |
| 英文摘要 | invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. however, global-scale tests of this assumption have been elusive because of the focus on exotic species richness, rather than relative abundance. this is problematic because low invader richness can indicate invasion resistance by the native community or, alternatively, dominance by a single exotic species. here, we used a globally replicated study to quantify relationships between exotic richness and abundance in grass-dominated ecosystems in 13 countries on six continents, ranging from salt marshes to alpine tundra. we tested effects of human land use, native community diversity, herbivore pressure, and nutrient limitation on exotic plant dominance. despite its widespread use, exotic richness was a poor proxy for exotic dominance at low exotic richness, because sites that contained few exotic species ranged from relatively pristine (low exotic richness and cover) to almost completely exotic-dominated ones (low exotic richness but high exotic cover). both exotic cover and richness were predicted by native plant diversity (native grass richness) and land use (distance to cultivation). although climate was important for predicting both exotic cover and richness, climatic factors predicting cover (precipitation variability) differed from those predicting richness (maximum temperature and mean temperature in the wettest quarter). herbivory and nutrient limitation did not predict exotic richness or cover. exotic dominance was greatest in areas with low native grass richness at the site- or regional-scale. although this could reflect native grass displacement, a lack of biotic resistance is a more likely explanation, given that grasses comprise the most aggressive invaders. these findings underscore the need to move beyond richness as a surrogate for the extent of invasion, because this metric confounds monodominance with invasion resistance. monitoring species' relative abundance will more rapidly advance our understanding of invasions. |
| 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] | biological invasions ; plant invasions ; united-states ; species invasions ; communities ; competition ; california ; patterns ; impacts ; conservation |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000326836000011 |
| 公开日期 | 2014-05-09 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/3896]  |
| 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.Univ MN, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA 2.Univ Queensland, Sch Biol Sci, ARC Ctr Excellence Environm Decis, Brisbane, Qld 4072, Australia 3.Univ Calif San Diego, Ecol Behav & Evolut Sect, San Diego, CA 92093 USA 4.Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80309 USA 5.Queensland Univ Technol, Brisbane, Qld 4000, Australia 6.Iowa State Univ, Dept Ecol Evolut & Organismal Biol, Ames, IA 50011 USA 7.Univ Zurich, Inst Evolutionary Biol & Environm Studies, CH-8057 Zurich, Switzerland 8.Univ Guelph, Dept Integrat Biol, Guelph, ON N1G 2W1, Canada 9.Univ Wisconsin, Dept Zool, Madison, WI 53706 USA 10.CSIRO Ecosyst Sci, Wembley, WA 6913, Australia |
| 推荐引用方式 GB/T 7714 | Seabloom, Eric W.,Borer, Elizabeth T.,Buckley, Yvonne,et al. Predicting invasion in grassland ecosystems: is exotic dominance the real embarrassment of richness?[J]. global change biology,2013,19(12):3677-3687. |
| APA | Seabloom, Eric W..,Borer, Elizabeth T..,Buckley, Yvonne.,Cleland, Elsa E..,Davies, Kendi.,...&Yang, Louie.(2013).Predicting invasion in grassland ecosystems: is exotic dominance the real embarrassment of richness?.global change biology,19(12),3677-3687. |
| MLA | Seabloom, Eric W.,et al."Predicting invasion in grassland ecosystems: is exotic dominance the real embarrassment of richness?".global change biology 19.12(2013):3677-3687. |
入库方式： OAI收割
来源：西北高原生物研究所
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