Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10021-014-9818-9 |
Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland | |
Svejcar, Lauren N.1,2; Bestelmeyer, Brandon T.1; Duniway, Michael C.1,3; James, Darren K.1 | |
通讯作者 | Bestelmeyer, Brandon T. |
来源期刊 | ECOSYSTEMS
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ISSN | 1432-9840 |
EISSN | 1435-0629 |
出版年 | 2015 |
卷号 | 18期号:1页码:146-153 |
英文摘要 | Theoretical models suggest that scale-dependent feedbacks between plant reproductive success and plant patch size govern transitions from highly to sparsely vegetated states in drylands, yet there is scant empirical evidence for these mechanisms. Scale-dependent feedback models suggest that an optimal patch size exists for growth and reproduction of plants and that a threshold patch organization exists below which positive feedbacks between vegetation and resources can break down, leading to critical transitions. We examined the relationship between patch size and plant reproduction using an experiment in a Chihuahuan Desert grassland. We tested the hypothesis that reproductive effort and success of a dominant grass (Bouteloua eriopoda) would vary predictably with patch size. We found that focal plants in medium-sized patches featured higher rates of grass reproductive success than when plants occupied either large patch interiors or small patches. These patterns support the existence of scale-dependent feedbacks in Chihuahuan Desert grasslands and indicate an optimal patch size for reproductive effort and success in B. eriopoda. We discuss the implications of these results for detecting ecological thresholds in desert grasslands. |
英文关键词 | critical threshold desertification dryland state transition Bouteloua eriopoda Chihuahuan Desert resilience patch size feedbacks |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000349434400011 |
WOS关键词 | SEMIARID GRAZING SYSTEMS ; GLOBAL DESERTIFICATION ; VEGETATION PATCHES ; PATTERN-FORMATION ; ARID ECOSYSTEMS ; FACILITATION ; COMPETITION ; DEGRADATION ; COMMUNITIES ; RECRUITMENT |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | United States Geological Survey ; New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/186878 |
作者单位 | 1.USDA ARS, Jornada Expt Range & Jornada Basin LTER, MSC 3JER, Las Cruces, NM 88003 USA; 2.New Mexico State Univ, Dept Plant & Environm Sci, Las Cruces, NM 88003 USA; 3.US Geol Survey, Southwest Biol Sci Ctr, Moab, UT 84532 USA |
推荐引用方式 GB/T 7714 | Svejcar, Lauren N.,Bestelmeyer, Brandon T.,Duniway, Michael C.,et al. Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland[J]. United States Geological Survey, New Mexico State University,2015,18(1):146-153. |
APA | Svejcar, Lauren N.,Bestelmeyer, Brandon T.,Duniway, Michael C.,&James, Darren K..(2015).Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland.ECOSYSTEMS,18(1),146-153. |
MLA | Svejcar, Lauren N.,et al."Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland".ECOSYSTEMS 18.1(2015):146-153. |
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Scale-Dependent Feed(695KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 |
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