Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2015.01.018 |
Top-down vs. bottom-up regulation of herbaceous primary production and composition in an arid, urbanizing ecosystem | |
Davis, Michelle K.1; Cook, Elizabeth M.1; Collins, Scott L.2; Hall, Sharon J.1 | |
通讯作者 | Cook, Elizabeth M. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2015 |
卷号 | 116页码:103-114 |
英文摘要 | Plant growth and composition are regulated by top-down (e.g., herbivory) and bottom-up factors (e.g., resource availability). The relative importance of consumers and multiple resources for net primary production (NPP) and community structure have rarely been studied in drylands, which cover about one third of Earth’s land surface, or with respect to increasingly common environmental changes such as urbanization. Urban expansion in drylands is likely to alter both nutrient availability and consumer populations. We explored the relative roles of herbivory, precipitation, and soil nitrogen (N) availability as drivers of aboveground NPP and composition of herbaceous communities in protected native ecosystems in the Sonoran Desert within and surrounding Phoenix, Arizona. Precipitation was the primary driver of production, while soil N availability had little effect on growth. Herbivory was secondarily important relative to precipitation, reducing aboveground biomass by similar to 33% regardless of proximity to the city. Protected desert open space supported distinct plant communities within and surrounding the city, but these patterns were more strongly related to bottom-up resources than consumers. Together, our results suggest that urbanization does not significantly affect the relative drivers of plant growth and structure in this arid ecosystem. (c) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Consumer-resource dynamics NPP Herbaceous annual plant communities Herbivory Urban Sonoran desert |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000350840100016 |
WOS关键词 | PLANT COMMUNITY STRUCTURE ; SONORAN DESERT ANNUALS ; CHIHUAHUAN DESERT ; EXPLOITATION ECOSYSTEMS ; NITROGEN DEPOSITION ; DRYLAND ECOSYSTEMS ; RESOURCE CONTROL ; PULSE DYNAMICS ; MOJAVE DESERT ; UNITED-STATES |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188320 |
作者单位 | 1.Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA; 2.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA |
推荐引用方式 GB/T 7714 | Davis, Michelle K.,Cook, Elizabeth M.,Collins, Scott L.,et al. Top-down vs. bottom-up regulation of herbaceous primary production and composition in an arid, urbanizing ecosystem[J]. Arizona State University,2015,116:103-114. |
APA | Davis, Michelle K.,Cook, Elizabeth M.,Collins, Scott L.,&Hall, Sharon J..(2015).Top-down vs. bottom-up regulation of herbaceous primary production and composition in an arid, urbanizing ecosystem.JOURNAL OF ARID ENVIRONMENTS,116,103-114. |
MLA | Davis, Michelle K.,et al."Top-down vs. bottom-up regulation of herbaceous primary production and composition in an arid, urbanizing ecosystem".JOURNAL OF ARID ENVIRONMENTS 116(2015):103-114. |
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