Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region
Study region: Guangdong Province, South China. Study focus: With evident climate and land use changes, concerns have arisen regarding the challenges for land and water management brought by alterations of the vegetation-hydroclimate relationships. Here we characterized the relationships under contra...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-02-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581821000045 |
| _version_ | 1818944015933898752 |
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| author | Runsheng Zhou Hailong Wang Kai Duan Bingjun Liu |
| author_facet | Runsheng Zhou Hailong Wang Kai Duan Bingjun Liu |
| author_sort | Runsheng Zhou |
| collection | DOAJ |
| description | Study region: Guangdong Province, South China. Study focus: With evident climate and land use changes, concerns have arisen regarding the challenges for land and water management brought by alterations of the vegetation-hydroclimate relationships. Here we characterized the relationships under contrasting dryness conditions in Guangdong province of China during 2002–2015 based on multiple datasets, with a focus on forests and crops, to identify the controlling roles of water and energy in vegetation growth. New hydrological insights: An increasing trend of annual vegetation and water availability, and diverse seasonal characteristics were revealed in dry and wet years. GPP was higher while NDVI and WUE were lower in dry years than wet years. Intra-annual NDVI and GPP were positively and WUE was negatively related to both water (TWS) and energy (ETp, Ta and Rs) factors. Linear regression shows that the correlation between TWSA and NDVI/GPP was stronger than that between atmospheric factors and NDVI/GPP at the annual scale, while the impact of the atmospheric factors on NDVI/GPP was stronger at the monthly scale. That is, water plays a dominant role in vegetation growth in the long term, while energy is more important in the short term. Different responses of NDVI and GPP to hydroclimate may lie in the GPP estimation algorithms. This study enhances our understanding of plant-water-energy interactions in the humid subtropical environment under contrasting dryness conditions. |
| first_indexed | 2024-12-20T07:36:30Z |
| format | Article |
| id | doaj.art-c9039e643cc44bebb830dfc5c09b69e0 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-20T07:36:30Z |
| publishDate | 2021-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-c9039e643cc44bebb830dfc5c09b69e02022-12-21T19:48:16ZengElsevierJournal of Hydrology: Regional Studies2214-58182021-02-0133100775Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical regionRunsheng Zhou0Hailong Wang1Kai Duan2Bingjun Liu3State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, ChinaSchool of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Sun Yat-sen University, Guangzhou, 510275, China; Corresponding author at: School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, China.School of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Sun Yat-sen University, Guangzhou, 510275, ChinaSchool of Civil Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Sun Yat-sen University, Guangzhou, 510275, ChinaStudy region: Guangdong Province, South China. Study focus: With evident climate and land use changes, concerns have arisen regarding the challenges for land and water management brought by alterations of the vegetation-hydroclimate relationships. Here we characterized the relationships under contrasting dryness conditions in Guangdong province of China during 2002–2015 based on multiple datasets, with a focus on forests and crops, to identify the controlling roles of water and energy in vegetation growth. New hydrological insights: An increasing trend of annual vegetation and water availability, and diverse seasonal characteristics were revealed in dry and wet years. GPP was higher while NDVI and WUE were lower in dry years than wet years. Intra-annual NDVI and GPP were positively and WUE was negatively related to both water (TWS) and energy (ETp, Ta and Rs) factors. Linear regression shows that the correlation between TWSA and NDVI/GPP was stronger than that between atmospheric factors and NDVI/GPP at the annual scale, while the impact of the atmospheric factors on NDVI/GPP was stronger at the monthly scale. That is, water plays a dominant role in vegetation growth in the long term, while energy is more important in the short term. Different responses of NDVI and GPP to hydroclimate may lie in the GPP estimation algorithms. This study enhances our understanding of plant-water-energy interactions in the humid subtropical environment under contrasting dryness conditions.http://www.sciencedirect.com/science/article/pii/S2214581821000045Vegetation dynamicsGross primary productivityTotal water storageClimate changePlant-water relationsSubtropical ecohydrology |
| spellingShingle | Runsheng Zhou Hailong Wang Kai Duan Bingjun Liu Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region Journal of Hydrology: Regional Studies Vegetation dynamics Gross primary productivity Total water storage Climate change Plant-water relations Subtropical ecohydrology |
| title | Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| title_full | Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| title_fullStr | Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| title_full_unstemmed | Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| title_short | Diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| title_sort | diverse responses of vegetation to hydroclimate across temporal scales in a humid subtropical region |
| topic | Vegetation dynamics Gross primary productivity Total water storage Climate change Plant-water relations Subtropical ecohydrology |
| url | http://www.sciencedirect.com/science/article/pii/S2214581821000045 |
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