Loading...
Please wait, while we are loading the content...
Similar Documents
Carbon, nitrogen, and phosphorus storage in alpine grassland ecosystems of Tibet: effects of grazing exclusion
| Content Provider | Scilit |
|---|---|
| Author | Lu, Xuyang Yan, Yan Sun, Jian Zhang, Xiaoke Chen, Youchao Wang, Xiaodan Cheng, Genwei |
| Copyright Year | 2015 |
| Description | Journal: Ecology and Evolution In recent decades, alpine grasslands have been seriously degraded on the Tibetan Plateau and grazing exclusion by fencing has been widely adopted to restore degraded grasslands since 2004. To elucidate how alpine grasslands carbon (C), nitrogen (N), and phosphorus (P) storage responds to this management strategy, three types of alpine grassland in nine counties in Tibet were selected to investigate C, N, and P storage in the environment by comparing free grazing (FG) and grazing exclusion (GE) treatments, which had run for 6–8 years. The results revealed that there were no significant differences in total ecosystem C, N, and P storage, as well as the C, N, and P stored in both total biomass and soil (0–30 cm) fractions between FG and GE grasslands. However, precipitation played a key role in controlling C, N, and P storage and distribution. With grazing exclusion, C and N stored in aboveground biomass significantly increased by 5.7 g m−2 and 0.1 g m−2, respectively, whereas the C and P stored in the soil surface layer (0–15 cm) significantly decreased by 862.9 g m−2 and 13.6 g m−2, respectively. Furthermore, the storage of the aboveground biomass C, N, and P was positively correlated with vegetation cover and negatively correlated with the biodiversity index, including Pielou evenness index, Shannon–Wiener diversity index, and Simpson dominance index. The storage of soil surface layer C, N, and P was positively correlated with soil silt content and negatively correlated with soil sand content. Our results demonstrated that grazing exclusion had no impact on total C, N, and P storage, as well as C, N, and P in both total biomass and soil (0–30 cm) fractions in the alpine grassland ecosystem. However, grazing exclusion could result in increased aboveground biomass C and N pools and decreased soil surface layer (0–15 cm) C and P pools. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4667823/pdf |
| Ending Page | 4504 |
| Page Count | 13 |
| Starting Page | 4492 |
| ISSN | 20457758 |
| e-ISSN | 20457758 |
| DOI | 10.1002/ece3.1732 |
| Journal | Ecology and Evolution |
| Issue Number | 19 |
| Volume Number | 5 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2015-09-23 |
| Access Restriction | Open |
| Subject Keyword | Journal: Ecology and Evolution Biodiversity Conservation Alpine Meadow Alpine Steppe Soil Organic Carbon Tibetan Plateau |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation |
