| DOI: | 10.2172/1237346
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| 报告号: | 1
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| 报告题名: | Final Report âPhysiological, demographic, competitive and biogeochemical controls on the response of Californiaâs ecosystems to environmental changeâ |
| 作者: | Goulden, Michael L.
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| 出版年: | 2016
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| 发表日期: | 2016-02-08
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| 总页数: | 5
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 氮
; 干旱
; 树冠
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| 主题词: | NITROGEN
; DROUGHT
; CROWN
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| 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. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1237346
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42270
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1237346.pdf（638KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Goulden, Michael L.. Final Report â Physiological, demographic, competitive and biogeochemical controls on the response of Californiaâ s ecosystems to environmental changeâ . 2016-01-01.
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