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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Spatial Distribution Patterns and the Evolution Process of Carbon Storage in a Typical Karst Canyon Area  [2015]

Siyu, Zhang; Xiaoyong, Bai; Shijie, Wang; Luoyi, Qin; et al.

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Qinglong County in Guizhou, China is a typical karst canyon area. Using quadrat methods and a land use transfer matrix we studied the carbon storage spatial distribution pattern and evolution process over three independent periods (1988, 1999 and 2009) in this area. Based on the results we estimated the carbon pool capacity of the entire karst canyon area in Guizhou and contribution ratios. Carbon storage and average carbon density of the karst area in Qinglong decreased at first, and then increased over the sampling period. The actual carbon storage of the karst canyon area in Guizhou was estimated to be 42.55 Tg. The average carbon intensity of the karst canyon area in Guizhou is far higher than that of national terrestrial ecosystems, especially in vegetation areas. Through cross comparison, we found that karst canyon areas have great carbon sequestration potential and we suggest that it is necessary to control and prevent rocky desertification in karst areas in China.
From the journal
Journal of resources and ecology
ISSN : 1674-764X

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Volume:
6
Issue:
4
Start Page:
199
End Page:
207
Publisher:
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
All titles:
"Spatial Distribution Patterns and the Evolution Process of Carbon Storage in a Typical Karst Canyon Area"@eng
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Volume:
6
Issue:
4
Start Page:
199
End Page:
207
Publisher:
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
All titles:
"Spatial Distribution Patterns and the Evolution Process of Carbon Storage in a Typical Karst Canyon Area"@eng