Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control
Rocky desertification is a common phenomenon in karst areas. Soil carbon and nitrogen storage is of great significance to the formation and evolution of ecosystems. Soil leakage is one of the important indicators in evaluating ecosystem stability. There are few studies on the response of carbon and...
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MDPI AG
2023-05-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/14/6/1121 |
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| author | Chenpeng Hu Ziqi Liu Kangning Xiong Xiaoxi Lyu Yuan Li Renkai Zhang |
| author_facet | Chenpeng Hu Ziqi Liu Kangning Xiong Xiaoxi Lyu Yuan Li Renkai Zhang |
| author_sort | Chenpeng Hu |
| collection | DOAJ |
| description | Rocky desertification is a common phenomenon in karst areas. Soil carbon and nitrogen storage is of great significance to the formation and evolution of ecosystems. Soil leakage is one of the important indicators in evaluating ecosystem stability. There are few studies on the response of carbon and nitrogen leakage below the surface of karst critical zones to forest ecosystems. The karst springs in the study area of Shibing Heichong, Bijie Salaxi and Guanling-Zhenfeng Huajiang in Guizhou, China, were selected to determine the variation characteristics of carbon and nitrogen content and karst spring outputs and their response to soil leakage. The results showed the following: (1) The content and output of carbon and nitrogen in karst springs in the three study areas showed obvious spatial differences. The carbon and nitrogen output of karst spring water was mainly concentrated in the rainy season. The carbon and nitrogen contents and output of karst springs in the Shibing Heichong study area were higher than those in the Bijie Salaxi and Guanling-Zhenfeng Huajiang study areas. (2) The carbon and nitrogen outputs of karst springs were mainly affected by flow. Land cover and land use in forests affect the carbon and nitrogen contents of karst springs and thus affect the output. (3) The higher the soil leakage of the karst spring was, the higher the carbon and nitrogen output. The leakage of the overlying soil in the Shibing Heichong study area was high, but the soil decline was small, and the stability of the forest ecosystem was relatively good. In summary, a lower degree of rocky desertification results in higher leakage from karst springs and higher risks of soil leakage; however, the ecosystem was relatively stable. Evaluating forest soil carbon and nitrogen loss and ecosystem stability in karst areas through the nutrient output of karst springs is of great significance for the prevention and control of rocky desertification areas. |
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| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-11T02:27:44Z |
| publishDate | 2023-05-01 |
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| series | Forests |
| spelling | doaj.art-8e9608eabbfa4169b58a96e441baaf022023-11-18T10:26:40ZengMDPI AGForests1999-49072023-05-01146112110.3390/f14061121Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification ControlChenpeng Hu0Ziqi Liu1Kangning Xiong2Xiaoxi Lyu3Yuan Li4Renkai Zhang5School of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaRocky desertification is a common phenomenon in karst areas. Soil carbon and nitrogen storage is of great significance to the formation and evolution of ecosystems. Soil leakage is one of the important indicators in evaluating ecosystem stability. There are few studies on the response of carbon and nitrogen leakage below the surface of karst critical zones to forest ecosystems. The karst springs in the study area of Shibing Heichong, Bijie Salaxi and Guanling-Zhenfeng Huajiang in Guizhou, China, were selected to determine the variation characteristics of carbon and nitrogen content and karst spring outputs and their response to soil leakage. The results showed the following: (1) The content and output of carbon and nitrogen in karst springs in the three study areas showed obvious spatial differences. The carbon and nitrogen output of karst spring water was mainly concentrated in the rainy season. The carbon and nitrogen contents and output of karst springs in the Shibing Heichong study area were higher than those in the Bijie Salaxi and Guanling-Zhenfeng Huajiang study areas. (2) The carbon and nitrogen outputs of karst springs were mainly affected by flow. Land cover and land use in forests affect the carbon and nitrogen contents of karst springs and thus affect the output. (3) The higher the soil leakage of the karst spring was, the higher the carbon and nitrogen output. The leakage of the overlying soil in the Shibing Heichong study area was high, but the soil decline was small, and the stability of the forest ecosystem was relatively good. In summary, a lower degree of rocky desertification results in higher leakage from karst springs and higher risks of soil leakage; however, the ecosystem was relatively stable. Evaluating forest soil carbon and nitrogen loss and ecosystem stability in karst areas through the nutrient output of karst springs is of great significance for the prevention and control of rocky desertification areas.https://www.mdpi.com/1999-4907/14/6/1121karst springsoildissolved organic carbon/nitrogenrocky desertificationterrestrial ecosystem |
| spellingShingle | Chenpeng Hu Ziqi Liu Kangning Xiong Xiaoxi Lyu Yuan Li Renkai Zhang Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control Forests karst spring soil dissolved organic carbon/nitrogen rocky desertification terrestrial ecosystem |
| title | Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control |
| title_full | Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control |
| title_fullStr | Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control |
| title_full_unstemmed | Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control |
| title_short | Temporal and Spatial Variations in Carbon/Nitrogen Output in the Karst Critical Zone and Its Response to the Forest Ecosystem of Karst Desertification Control |
| title_sort | temporal and spatial variations in carbon nitrogen output in the karst critical zone and its response to the forest ecosystem of karst desertification control |
| topic | karst spring soil dissolved organic carbon/nitrogen rocky desertification terrestrial ecosystem |
| url | https://www.mdpi.com/1999-4907/14/6/1121 |
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