Arid
DOI10.1007/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
ISSN1432-9840
EISSN1435-0629
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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