Arid
DOI10.1890/05-2074
Regulation of benthic algal and animal communities by salt marsh plants: Impact of shading
Whitcraft, Christine R.; Levin, Lisa A.
通讯作者Whitcraft, Christine R.
来源期刊ECOLOGY
ISSN0012-9658
EISSN1939-9170
出版年2007
卷号88期号:4页码:904-917
英文摘要

Plant cover is a fundamental feature of many coastal marine and terrestrial systems and controls the structure of associated animal communities. Both natural and human-mediated changes in plant cover influence abiotic sediment properties and thus have cascading impacts on the biotic community. Using clipping ( structural) and light ( shading) manipulations in two salt marsh vegetation zones ( one dominated by Spartina foliosa and one by Salicornia virginica), we tested whether these plant species exert influence on abiotic environmental factors and examined the mechanisms by which these changes regulate the biotic community. In an unshaded ( plant and shade removal) treatment, marsh soils exhibited harsher physical properties, a microalgal community composition shift toward increased diatom dominance, and altered macrofaunal community composition with lower species richness, a larger proportion of insect larvae, and a smaller proportion of annelids, crustaceans, and oligochaetes compared to shaded ( plant removal, shade mimic) and control treatment plots. Overall, the shaded treatment plots were similar to the controls. Plant cover removal also resulted in parallel shifts in microalgal and macrofaunal isotopic signatures of the most dynamic species. This suggests that animal responses are seen mainly among microalgae grazers and may be mediated by plant modi. cation of microalgae. Results of these experiments demonstrate how light reduction by the vascular plant canopy can control salt marsh sediment communities in an arid climate. This research facilitates understanding of sequential consequences of changing salt marsh plant cover associated with climate or sea level change, habitat degradation, marsh restoration, or plant invasion.


英文关键词abiotic properties biodiversity cordgrass light macrobenthos microalgae pickleweed plant cover Salicornia virginica Spartina foliosa stable isotope
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000246104600011
WOS关键词SEDIMENT-WATER INTERFACE ; MULTIPLE STABLE ISOTOPES ; SPARTINA-ALTERNIFLORA ; SOUTHERN CALIFORNIA ; TIDAL MARSH ; FOOD WEBS ; BIODIVERSITY ; MECHANISMS ; VEGETATION ; WETLAND
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154015
作者单位(1)Univ Calif San Diego, Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA 92093 USA
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Whitcraft, Christine R.,Levin, Lisa A.. Regulation of benthic algal and animal communities by salt marsh plants: Impact of shading[J],2007,88(4):904-917.
APA Whitcraft, Christine R.,&Levin, Lisa A..(2007).Regulation of benthic algal and animal communities by salt marsh plants: Impact of shading.ECOLOGY,88(4),904-917.
MLA Whitcraft, Christine R.,et al."Regulation of benthic algal and animal communities by salt marsh plants: Impact of shading".ECOLOGY 88.4(2007):904-917.
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