Effect of desertification on productivity in a desert steppe.
Effect of desertification on productivity in a desert steppe.
复制标题
荒漠化对荒漠草原生产力的影响
DOI：
10.1038/srep27839
复制
发表时间：
2016-06-14
影响因子：
4.6
通讯作者：
Shangguan Z
中科院分区：
文献类型：
--
作者：
Tang Z;An H;Deng L;Wang Y;Zhu G;Shangguan Z
荒漠化是世界上最严重的土地退化类型之一，意义重大，因为它在某种程度上发生在全球约 40% 的土地面积上，并影响着超过 10 亿人。在本研究中，我们采用时空方法量化了五种不同荒漠化状况（潜在（PD）、轻度（LD）、中度（MD）、重度（SD）和极重度（VSD））对中国北方荒漠草原生态系统的影响，以考察植被生产力与土壤性质之间的关系，并确定荒漠化对生产力影响的机制。结果表明，荒漠化对TP（全磷）和AP（速效磷）的影响并不显着，荒漠化直接改变了土壤物理性质，从而降低了荒漠草原的生产力，进而直接影响土壤化学性质。因此，通过集约化草地管理来改善土壤质量可能会导致生态系统功能和服务的长期保存。
Desertification, one of the most severe types of land degradation in the world, is of great importance because it is occurring, to some degree, on approximately 40% of the global land area and is affecting more than 1 billion people. In this study, we used a space-for-time method to quantify the impact of five different desertification regimes (potential (PD), light (LD), moderate (MD), severe (SD), and very severe (VSD)) on a desert steppe ecosystem in northern China to examine the relationship between the productivity of the vegetation and soil properties and to determine the mechanism underlying the effects of desertification on productivity. Our results showed that the effects of desertification on TP (total phosphorus) and AP (available phosphorus) were not significant, and desertification decreased productivity in the desert steppe as a result of direct changes to soil physical properties, which can directly affect soil chemical properties. Therefore, intensive grassland management to improve soil quality may result in the long-term preservation of ecosystem functions and services.