The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China
Ecosystem water use efficiency (WUE) and carbon use efficiency (CUE), as two of the most important ecological indicators of an ecosystem, represent the carbon assimilation rate of unit water consumption and the capacity of transferring carbon from the atmosphere to potential carbon sinks. Revealing...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/8659138 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567855622651904 |
|---|---|
| author | Bo Li Fang Huang Shuai Chang Ning Sun |
| author_facet | Bo Li Fang Huang Shuai Chang Ning Sun |
| author_sort | Bo Li |
| collection | DOAJ |
| description | Ecosystem water use efficiency (WUE) and carbon use efficiency (CUE), as two of the most important ecological indicators of an ecosystem, represent the carbon assimilation rate of unit water consumption and the capacity of transferring carbon from the atmosphere to potential carbon sinks. Revealing WUE and CUE changes and their impact factors is vital for regional carbon-water interactions and carbon budget assessment. Climate affects carbon and water processes differently. Compared to WUE, the variations in CUE in response to climate factors and human activity remain inadequately understood. In this study, ecosystem-level WUE and CUE variations in the Songnen Plain (SNP), Northeast China, during 2001–2015, were investigated using Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. The relationships between WUE, CUE, main climate factors, and human impacts were explored. The results showed that ecosystem WUE and CUE have fluctuated over time, with regional average values of 1.319 gC·kg−1H2O and 0.516, respectively. Deciduous broad-leaved forests had the highest average WUE but the lowest CUE. The multiyear average CUE of grassland ranked in first place, while the lowest WUE indicated that a lesser capacity of net productivity was generated by the use of limited water supply. WUE and CUE showed a downward trend in most areas of the SNP, indicating that the carbon sequestration capacity of the terrestrial ecosystem became weaker in the past 15 years. Annual precipitation and relative humidity had positive influences on WUE and CUE in more than 60% of the study area. The total annual sunshine duration and annual average temperature negatively affected WUE and CUE in most areas. Human activities had a positive effect on ecosystem WUE changes in the SNP but might inhibit CUE variations. Our findings aid in understanding the biological regulation mechanisms of carbon-water cycle coupling and provide a scientific basis for formulating sustainable regional development strategies and guiding water and land resources management. |
| format | Article |
| id | doaj-art-3acc32c92b624024b3ff5228fb07bbeb |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-3acc32c92b624024b3ff5228fb07bbeb2025-02-03T01:00:23ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/86591388659138The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, ChinaBo Li0Fang Huang1Shuai Chang2Ning Sun3School of Geographical Sciences, Northeast Normal University, Changchun 130024, ChinaSchool of Geographical Sciences, Northeast Normal University, Changchun 130024, ChinaSchool of Geographical Sciences, Northeast Normal University, Changchun 130024, ChinaSchool of Geographical Sciences, Northeast Normal University, Changchun 130024, ChinaEcosystem water use efficiency (WUE) and carbon use efficiency (CUE), as two of the most important ecological indicators of an ecosystem, represent the carbon assimilation rate of unit water consumption and the capacity of transferring carbon from the atmosphere to potential carbon sinks. Revealing WUE and CUE changes and their impact factors is vital for regional carbon-water interactions and carbon budget assessment. Climate affects carbon and water processes differently. Compared to WUE, the variations in CUE in response to climate factors and human activity remain inadequately understood. In this study, ecosystem-level WUE and CUE variations in the Songnen Plain (SNP), Northeast China, during 2001–2015, were investigated using Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. The relationships between WUE, CUE, main climate factors, and human impacts were explored. The results showed that ecosystem WUE and CUE have fluctuated over time, with regional average values of 1.319 gC·kg−1H2O and 0.516, respectively. Deciduous broad-leaved forests had the highest average WUE but the lowest CUE. The multiyear average CUE of grassland ranked in first place, while the lowest WUE indicated that a lesser capacity of net productivity was generated by the use of limited water supply. WUE and CUE showed a downward trend in most areas of the SNP, indicating that the carbon sequestration capacity of the terrestrial ecosystem became weaker in the past 15 years. Annual precipitation and relative humidity had positive influences on WUE and CUE in more than 60% of the study area. The total annual sunshine duration and annual average temperature negatively affected WUE and CUE in most areas. Human activities had a positive effect on ecosystem WUE changes in the SNP but might inhibit CUE variations. Our findings aid in understanding the biological regulation mechanisms of carbon-water cycle coupling and provide a scientific basis for formulating sustainable regional development strategies and guiding water and land resources management.http://dx.doi.org/10.1155/2019/8659138 |
| spellingShingle | Bo Li Fang Huang Shuai Chang Ning Sun The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China Advances in Meteorology |
| title | The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China |
| title_full | The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China |
| title_fullStr | The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China |
| title_full_unstemmed | The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China |
| title_short | The Variations of Satellite-Based Ecosystem Water Use and Carbon Use Efficiency and Their Linkages with Climate and Human Drivers in the Songnen Plain, China |
| title_sort | variations of satellite based ecosystem water use and carbon use efficiency and their linkages with climate and human drivers in the songnen plain china |
| url | http://dx.doi.org/10.1155/2019/8659138 |
| work_keys_str_mv | AT boli thevariationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT fanghuang thevariationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT shuaichang thevariationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT ningsun thevariationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT boli variationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT fanghuang variationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT shuaichang variationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina AT ningsun variationsofsatellitebasedecosystemwateruseandcarbonuseefficiencyandtheirlinkageswithclimateandhumandriversinthesongnenplainchina |