Soil C and N content under evolving landscapes in an arid inland river basin of northwest China
文献类型：期刊论文
| 作者 | Wang, GX; Yao, JH; Luo, L; Qian, L |
| 刊名 | LANDSCAPE ECOLOGY
 |
| 出版日期 | 2004-08-01 |
| 卷号 | 19期号:6页码:621-629 |
| 关键词 | arid region landscape evolution soil organic C and N contents deposition and losses impacts |
| ISSN号 | 0921-2973 |
| 通讯作者 | Wang, GX(gxwang@ns.lzb.ac.cn) |
| 英文摘要 | The state of a landscape is primarily reflected by its soil nutrients and organic matter status, which in turn are related to the type, size and number of landscape elements or patches. Evolving landscape patterns inevitably cause an evolution in ecosystem functionality. In particular, in arid regions, gained, lost and existing soil N and C pools have important ecological implications. The impacts of evolving landscapes in the middle reaches of the Heihe River basin of northwest China on soil organic C and N losses were assessed by both quantitative and computer modelling methods. In the period 1987-1997, patch transitions of the region's evolving landscapes have been predominantly characterized by a farmland expansion of 1.5 . 10(3) km(2), and the desertification of 15.12% of existing farmlands into desert. As the result of such changes, alpine steppe and piedmont warm and desert steppe decreased by 43.9% and 2.72% respectively, whereas, plain swamp meadow and gobi and sandy desert increased by 13.2% and 10.77%, respectively. Consequently, soil organic matter and N contents decreased significantly in most landscape patches. In the study region, over these ten years, net soil organic C and N losses reached 5.30 Gg and 0.51 Gg, respectively, a pattern repeated over the entire arid inland region of northwest China, due to similar hydrological resources and patterns of regional development. Large soil C and N losses caused by landscape changes will inevitably result in significant new environmental problems. |
| 收录类别 | SCI |
| WOS关键词 | ECOLOGY |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
| WOS类目 | Ecology ; Geography, Physical ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000224100600004 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556955 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wang, GX |
| 作者单位 | 1.Lanzhou Univ, MOE Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, GX,Yao, JH,Luo, L,et al. Soil C and N content under evolving landscapes in an arid inland river basin of northwest China[J]. LANDSCAPE ECOLOGY,2004,19(6):621-629. |
| APA | Wang, GX,Yao, JH,Luo, L,&Qian, L.(2004).Soil C and N content under evolving landscapes in an arid inland river basin of northwest China.LANDSCAPE ECOLOGY,19(6),621-629. |
| MLA | Wang, GX,et al."Soil C and N content under evolving landscapes in an arid inland river basin of northwest China".LANDSCAPE ECOLOGY 19.6(2004):621-629. |
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来源：寒区旱区环境与工程研究所
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