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The role of light, soil and human factors on the probability of occurrence of an invasive and three native plant species in coastal transitions of coastal mississippi, USA

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Journal of Plant Ecology 2015年第5期8卷 491-500页

作者： Shishir Paudel Loretta L.Battaglia Department of Plant Biology and Center for Ecology Southern Illinois University CarbondaleMail code 6509CarbondaleIL 62901USA The Department of Natural Resource Ecology&Management Oklahoma State UniversityStillwaterOK 74078USA.

Aims understanding relationships between the distributions of species and their surrounding environment provides a basis for forecasting how species will respond to future environmental *** this study,we examined the effects of environmental factors and human devel-opmental features associated with disturbances on probability of occurrence of juveniles of invasive Triadica sebifera and three native plant species,Baccharis halimifolia,Ilex vomitoria and Morella cer-ifera within a typical coastal transition in coastal mississippi,*** We recorded presence of juveniles of focal species and measured environmental factors(soil salinity,canopy openness,soil texture and soil carbon to nitrogen ratio)along an 11.3 km transect located at grand bay National Estuarine research ***,we doc-umented anthropogenic features and associated activities as a proxy for human *** Findings With the exception of ***,all other species occurrences were significantly influenced by an interaction between soil salinity and canopy *** occurrence of *** sharply decreased with *** occurrence peaked at moderate levels of salinity and low to moderate levels of canopy *** of *** and the invasive *** were highest at low levels of salinity and canopy *** results indicate that salinity is a strong driver that limits distribution of juvenile native and invasive species in coastal *** regression confirmed the positive effects of anthropogenic disturbances on *** and *** *** appears that while soil salinity is likely to drive retreat of the seaward boundaries of woody plant species distributions,increased human developments along the coast likely enhance the inland spread of species,in particular the invasive *** by increasing distur-bances and facilitating *** from this study can offer insight for the development of

关键词： canopy openness coastal transition disturbance invasive species native species salinity

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