Topographic controls on the variability of soil respiration in a humid subtropical forest
文献类型：期刊论文
| 作者 | Tian, Qiuxiang2,3; Wang, Dongya1,2; Tang, Yanan1,2; Li, Yi1,2; Wang, Min1,2; Liao, Chang1,2; Liu, Feng2,3 |
| 刊名 | BIOGEOCHEMISTRY
 |
| 出版日期 | 2019-10-01 |
| 卷号 | 145期号:1-2页码:177-192 |
| 关键词 | Soil respiration Topographic position Temporal variation Spatial variation Carbon sources Soil physico-chemical properties |
| ISSN号 | 0168-2563 |
| DOI | 10.1007/s10533-019-00598-x |
| 英文摘要 | Knowledge of the spatial and temporal variabilities of soil respiration is important in estimating the soil carbon budget and in understanding how soils may respond to global changes. In areas with complex terrain, the topography can modify the hydrological conditions and other biophysical variables, which complicates the spatial and temporal heterogeneity of soil respiration. Herein, we investigated soil respiration along topographic transects with ridge, middle slope, lower slope and valley positions in a humid subtropical mountain forest in China to assess the driving factors of the variations in soil respiration. Our results showed that there were substantial temporal and spatial variations in soil respiration. The temporal variation of soil respiration could be well explained by the dynamics of soil temperature and moisture. Soil respiration rates also showed clear topographic pattern and decreased significantly from the ridge to valley soils, with the mean rates equaled 3.43 +/- 0.13, 2.64 +/- 0.30, 2.13 +/- 0.26 and 1.88 +/- 0.24 mu mol m(-2) s(-1) at the ridge, middle slope, lower slope, and valley, respectively. Correlation analyses revealed that the spatial variation of soil respiration could be explained by multiple variables (e.g., soil temperature, basal area of the trees, thickness of the forest floor, root biomass and stock of soil dissolved carbon, soil C/N and soil bulk density). Results from partial least squares path modeling suggested that the topography modified the fine root distribution and the lateral losses of light and dissolved organic materials that created areas of high carbon sources for soil respiration at the ridge. The topographically regulated processes further resulted in a high soil C/N at the ridge that favored SOC decomposition. The higher respiration rate for the ridge soil and its higher sensitivity to soil temperature and moisture changes suggested that the ridge position was a potential hot spot for future environmental changes. Future studies and management practices regarding the soil carbon efflux in forest ecosystems with topographical variations should take into account the topographic effects. |
| 资助项目 | Natural Science Foundation of China[31400463] ; Natural Science Foundation of China[31470526] ; Natural Science Foundation of China[31870465] ; Chinese National Key Development Program for Basic Research[2014CB954004] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000491084600010 |
| 出版者 | SPRINGER |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/8572]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Liu, Feng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 3.Chinese Acad Sci, Core Bot Gardens, Ctr Plant Ecol, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Qiuxiang,Wang, Dongya,Tang, Yanan,et al. Topographic controls on the variability of soil respiration in a humid subtropical forest[J]. BIOGEOCHEMISTRY,2019,145(1-2):177-192. |
| APA | Tian, Qiuxiang.,Wang, Dongya.,Tang, Yanan.,Li, Yi.,Wang, Min.,...&Liu, Feng.(2019).Topographic controls on the variability of soil respiration in a humid subtropical forest.BIOGEOCHEMISTRY,145(1-2),177-192. |
| MLA | Tian, Qiuxiang,et al."Topographic controls on the variability of soil respiration in a humid subtropical forest".BIOGEOCHEMISTRY 145.1-2(2019):177-192. |
入库方式： OAI收割
来源：武汉植物园
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。