[1]ZHANG Zixia,LIU Peng,WANG Yan,et al.Spatial and Temporal Distribution of Eco-Chemometric Characteristics of Carbon, Nitrogen and Phosphorus in Surface Sediments of Different Karst Wetlands[J].Research of Soil and Water Conservation,2020,27(04):23-30.
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Spatial and Temporal Distribution of Eco-Chemometric Characteristics of Carbon, Nitrogen and Phosphorus in Surface Sediments of Different Karst Wetlands
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
23-30
Column:
目次
Public date:
2020-06-20
- Title:
- Spatial and Temporal Distribution of Eco-Chemometric Characteristics of Carbon, Nitrogen and Phosphorus in Surface Sediments of Different Karst Wetlands
- CLC:
- X171
- DOI:
- -
- Abstract:
- To clarify the carbon sink potential of wetland ecosystem and the ecosystem response to environmental change, taking Puzhehei karst watershed in Southeast Yunnan as the research site, we divided the karst wetlands in this watershed into 4 types: river wetland, lake wetland, swamp wetland and reservoir wetland. The balance relationship of carbon, nitrogen and phosphorus in wetland sediments was studied, and the distribution and eco-chemical characteristics of carbon, nitrogen and phosphorus in surface sediments of wetland in wet season, dry season and peaceful season were discussed. The results show that:(1)the changes of contents of SOC, TN-S and TP-S in surface sediments of different types of wetlands in Puzhehei watershed are different in different periods, the SOC content(47.81 g/kg)in reservoir pond wetlands is the highest in average period, the SOC content(12.77 g/kg)is the lowest in marsh wetland in wet period, and the SOC content(2.93 g/kg)is the highest in Marsh wetlands in dry period(2.93 g/kg), the lowest SOC content in reservoir pond wetland is 1.22 g/kg in wet period; the content of TP-S(1.32 g/kg)is the highest in river wetlands and the content of TP-S(0.43 g/kg)is the lowest in marsh wetlands, respectively; there are the significant positive correlations among SOC, TN-S and TP-S in surface sediments of different types of wetlands(p<0.05);(2)the changes of C/N-S, C/P-S and N/P-S in surface sediments of different types of wetlands are basically the same in different hydrological periods; except for Lake wetlands, from dry season, wet season to average season, C/N-S and C/P-S in average season are the highest, which are 25.43 and 94.49, respectively, and N/P-S in average season is the highest, C/N-S, C/P-S and N/P-S are the lowest in dry season, which are 9.17, 14.85 and 1.62, respectively; there are the significant positive correlations between C/N-S, C/P-S, N/P-S and TN-S, TP-S and N/P-W in surface sediments of different types of wetlands (p<0.05);(3)generally speaking, the contents of SOC, TN-S and TP-S in wet season are lower than those in dry season and average season, and the C/N-S, C/P-S and N/P-S values in average season are higher than those in dry season.
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Last Update:
2020-07-09