YIC-IR  > 中科院海岸带环境过程与生态修复重点实验室
Intraspecific interactions shift from competitive to facilitative across a low to high disturbance gradient in a salt marsh
Zhang, LW; Wang, BC; Zhang, LW (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China. lwzhang@yic.ac.cn
Source PublicationPLANT ECOLOGY
ISSN1385-0237
2016-08-01
Volume217Issue:8Pages:959-967
KeywordIntraspecific Facilitation Intraspecific Competition Salt Marsh Temporal Scale Spatial Point Pattern Analysis Disturbance
DOI10.1007/s11258-016-0621-x
Contribution Rank[Zhang, Liwen; Wang, Bingchen] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Wang, Bingchen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Department中科院海岸带环境过程与生态修复重点实验室
AbstractDisturbances are ubiquitous among salt marshes, and disturbances such as litter removal may form stressful environmental conditions. The stress-gradient hypothesis (SGH) predicts that the relative importance of facilitation and competition between species will vary inversely to each other across abiotic stress gradients. However, how intraspecific interactions vary across disturbance levels, and whether they follow the SGH has not been investigated. To test the SGH with intraspecific interactions within Suaeda salsa individuals, we assessed individual survival in established fully mapped salt marsh plots with two treatments, disturbed, litter removal and control, undisturbed plots. Recently developed spatial statistics were applied to distinguish between random processes, intraspecific facilitation, scramble competition, and contest competition underlying the spatial patterns at different spatial scales, growth stages, and disturbance levels. We found evidence that intraspecific interactions among S. salsa individuals across disturbance levels tended to support the SGH, but this support depended on time and space. Intraspecific interactions were more likely to show positive density dependence in disturbed plots, particularly at the seedling period and when individuals were separated by < 9 cm. However, positive density dependence was not detected in undisturbed plots. The protective effects of litter on seedlings, which were lost in undisturbed sites, may have been at least partly simulated at high seedling densities. Mortality in disturbed sites was not random, and facilitation had a more important influence than competition on population dynamics in high disturbance sites. However, the influence of competition on population dynamics, specifically scramble competition was also clearly important.
SubtypeArticle
Funding OrganizationNational Natural Science Foundation of China(31100313) ; Foundation for Outstanding Young Scientist in Shandong Province(BS2013HZ012) ; Program of Science and Technology Service Network Initiative, Chinese Academy of Sciences(KFJ-EW-STS-127)
Indexed BySCI
Language英语
WOS KeywordPOSITIVE INTERACTIONS ; PLANT-COMMUNITIES ; SPATIAL-PATTERNS ; POPULATIONS ; MORTALITY ; STRESS ; HYPOTHESIS ; MARITIMA
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS IDWOS:000380133400002
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/17083
Collection中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorZhang, LW (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China. lwzhang@yic.ac.cn
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res
2.Univ Chinese Acad Sci
Recommended Citation
GB/T 7714
Zhang, LW,Wang, BC,Zhang, LW . Intraspecific interactions shift from competitive to facilitative across a low to high disturbance gradient in a salt marsh[J]. PLANT ECOLOGY,2016,217(8):959-967.
APA Zhang, LW,Wang, BC,&Zhang, LW .(2016).Intraspecific interactions shift from competitive to facilitative across a low to high disturbance gradient in a salt marsh.PLANT ECOLOGY,217(8),959-967.
MLA Zhang, LW,et al."Intraspecific interactions shift from competitive to facilitative across a low to high disturbance gradient in a salt marsh".PLANT ECOLOGY 217.8(2016):959-967.
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