Final Report âPhysiological, demographic, competitive and biogeochemical controls on the response of Californiaâs ecosystems to environmental changeâ

doi:10.2172/1237346

GSTDTAP > 地球科学

DOI	10.2172/1237346
报告编号	1
来源ID	OSTI ID: 1237346
	Final Report âPhysiological, demographic, competitive and biogeochemical controls on the response of Californiaâs ecosystems to environmental changeâ
	Goulden, Michael L.
	2016-02-08
出版年	2016
页数	5
语种	英语
国家	美国
领域	地球科学
英文摘要	The Loma Ridge Global Change Experiment is a large, well-replicated water and nitrogen input manipulation in the Santa Ana Mountain foothills that operated with DOE support from 2006 to 2015. The experiment considers the effects of increased and decreased water input and increased N input on two adjacent ecosystem types: California Annual Grassland (GL), which is dominated by exotic, Eurasian grasses and forbs, and Coastal Sage Shrubland (CSS), which is dominated by native, drought deciduous, perennial shrubs. The experiment proceeded in two phases: "Phase I Severe treatment", and "Phase II Return to ambient". Phase I showed very rapid change in species composition or ANPP with altered water or N input (low resistance), whereas Phase II showed a very rapid return to initial conditions once ambient water or N input were restored (high resilience). The severe drought treatment killed most of the shrubs in the dry plots and opened the canopy to herbaceous species, but this damage was ephemeral, and the shrubland community is recovering through the mechanisms and patterns that more typically mediate recovery from crown fire. The pattern of low resistance and high resilience carries implications for other "global change experiments", which have often also seen large and rapid treatment effects (low resistance), but have less frequently considered the subsequent recovery or resilience of the system.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7230
专题	地球科学
推荐引用方式 GB/T 7714	Goulden, Michael L.. Final Report âPhysiological, demographic, competitive and biogeochemical controls on the response of Californiaâs ecosystems to environmental changeâ,2016.