Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention
Exploring the relationship between human activity, vegetation leaf area index (LAI), and land surface evapotranspiration (ET) on the Loess Plateau in northern Shaanxi is crucial for maintaining regional ecosystem functions and optimally allocating water resources. This study investigated the driving...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
|
| Series: | Ecological Indicators |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23006593 |
| _version_ | 1797683163476000768 |
|---|---|
| author | Xue Shang Zhaoquan He Wenbo Chen Lei He Huan Yang |
| author_facet | Xue Shang Zhaoquan He Wenbo Chen Lei He Huan Yang |
| author_sort | Xue Shang |
| collection | DOAJ |
| description | Exploring the relationship between human activity, vegetation leaf area index (LAI), and land surface evapotranspiration (ET) on the Loess Plateau in northern Shaanxi is crucial for maintaining regional ecosystem functions and optimally allocating water resources. This study investigated the driving mechanism of LAI on ET under the intervention of the human activity intensity (HAIS) by analyzing seasonal and interannual variability characteristics and processes using remote sensing data of land use, LAI, and ET in typical natural landscapes (forest, grassland, and desert) in northern Shaanxi from 2000 to 2020. The primary findings were: (1) In the previous two decades, grassland HAIS was the largest, mainly distributed in central districts and counties, and gradually decreasing. The LAI and ET were ranked as follows: forest > grassland > desert, with an interannually increasing tendency, and the yearly mean LAI and ET of forest reached 2.18 and 16.47 mm, respectively. (2) The LAI and ET of the three typical natural landscapes changed substantially during the growing season (April-October) of vegetation, which increased and then decreased, reaching a maximum in June-August. The LAI and ET displayed noticeable numerical clustering among the months, with higher and concentrated values in June-August and lower values in April, May, and October. (3) Forest and grassland HAIS negatively affected LAI, and detrimentally regulated ET by primarily influencing LAI4-LAI7 (LAI from April to July). Desert HAIS had a significant positive link with the LAI and primarily regulated ET by positively influencing LAI6-LAI10. Compared to forest and grassland, the coregulatory effect of LAI on ET in the desert lagged relatively in the month. Our study recommends accelerating the conversion of the desert to forest and grassland on the Loess Plateau in northern Shaanxi for stabilizing landscape ecosystem function and the reciprocal feedback between vegetation and water resources faster. |
| first_indexed | 2024-03-12T00:11:31Z |
| format | Article |
| id | doaj.art-d4b608c59fb441b49ed44ec8e03e0586 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-12T00:11:31Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-d4b608c59fb441b49ed44ec8e03e05862023-09-16T05:29:10ZengElsevierEcological Indicators1470-160X2023-10-01154110517Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human interventionXue Shang0Zhaoquan He1Wenbo Chen2Lei He3Huan Yang4College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China; Yan'an Key Laboratory of Ecological Restoration, School of Life Sciences, Yan'an University, Yan'an 716000, China; The Key Laboratory of Landscape and Environment, Jiangxi Agricultural University, Nanchang 330045, ChinaYan'an Key Laboratory of Ecological Restoration, School of Life Sciences, Yan'an University, Yan'an 716000, ChinaEast China University of Technology, Nanchang 330013, China; Key Laboratory of Mine Environmental Monitoring and Improving Around Poyang Lake, Ministry of Natural Resources, China; Corresponding author.Tourism and Urban Management College of Jiangxi University of Finance and Economics, Nanchang 330013, ChinaCollege of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China; The Key Laboratory of Landscape and Environment, Jiangxi Agricultural University, Nanchang 330045, ChinaExploring the relationship between human activity, vegetation leaf area index (LAI), and land surface evapotranspiration (ET) on the Loess Plateau in northern Shaanxi is crucial for maintaining regional ecosystem functions and optimally allocating water resources. This study investigated the driving mechanism of LAI on ET under the intervention of the human activity intensity (HAIS) by analyzing seasonal and interannual variability characteristics and processes using remote sensing data of land use, LAI, and ET in typical natural landscapes (forest, grassland, and desert) in northern Shaanxi from 2000 to 2020. The primary findings were: (1) In the previous two decades, grassland HAIS was the largest, mainly distributed in central districts and counties, and gradually decreasing. The LAI and ET were ranked as follows: forest > grassland > desert, with an interannually increasing tendency, and the yearly mean LAI and ET of forest reached 2.18 and 16.47 mm, respectively. (2) The LAI and ET of the three typical natural landscapes changed substantially during the growing season (April-October) of vegetation, which increased and then decreased, reaching a maximum in June-August. The LAI and ET displayed noticeable numerical clustering among the months, with higher and concentrated values in June-August and lower values in April, May, and October. (3) Forest and grassland HAIS negatively affected LAI, and detrimentally regulated ET by primarily influencing LAI4-LAI7 (LAI from April to July). Desert HAIS had a significant positive link with the LAI and primarily regulated ET by positively influencing LAI6-LAI10. Compared to forest and grassland, the coregulatory effect of LAI on ET in the desert lagged relatively in the month. Our study recommends accelerating the conversion of the desert to forest and grassland on the Loess Plateau in northern Shaanxi for stabilizing landscape ecosystem function and the reciprocal feedback between vegetation and water resources faster.http://www.sciencedirect.com/science/article/pii/S1470160X23006593Leaf area indexEvapotranspirationDriving mechanismHuman activityLoess Plateau in northern Shaanxi |
| spellingShingle | Xue Shang Zhaoquan He Wenbo Chen Lei He Huan Yang Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention Ecological Indicators Leaf area index Evapotranspiration Driving mechanism Human activity Loess Plateau in northern Shaanxi |
| title | Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention |
| title_full | Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention |
| title_fullStr | Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention |
| title_full_unstemmed | Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention |
| title_short | Changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the Loess Plateau in northern Shaanxi of China under the human intervention |
| title_sort | changes and response mechanisms of leaf area index and evapotranspiration in the typical natural landscapes of the loess plateau in northern shaanxi of china under the human intervention |
| topic | Leaf area index Evapotranspiration Driving mechanism Human activity Loess Plateau in northern Shaanxi |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23006593 |
| work_keys_str_mv | AT xueshang changesandresponsemechanismsofleafareaindexandevapotranspirationinthetypicalnaturallandscapesoftheloessplateauinnorthernshaanxiofchinaunderthehumanintervention AT zhaoquanhe changesandresponsemechanismsofleafareaindexandevapotranspirationinthetypicalnaturallandscapesoftheloessplateauinnorthernshaanxiofchinaunderthehumanintervention AT wenbochen changesandresponsemechanismsofleafareaindexandevapotranspirationinthetypicalnaturallandscapesoftheloessplateauinnorthernshaanxiofchinaunderthehumanintervention AT leihe changesandresponsemechanismsofleafareaindexandevapotranspirationinthetypicalnaturallandscapesoftheloessplateauinnorthernshaanxiofchinaunderthehumanintervention AT huanyang changesandresponsemechanismsofleafareaindexandevapotranspirationinthetypicalnaturallandscapesoftheloessplateauinnorthernshaanxiofchinaunderthehumanintervention |