Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/05-2074 |
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
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ISSN | 0012-9658 |
EISSN | 1939-9170 |
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 |
推荐引用方式 GB/T 7714 | 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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