Temporal-spatial variation of WUE and its response to climate change in alpine area of southwestern China

Yuandong, 张远东 Zhang; Rui, 庞瑞 Pang; Fengxue, 顾峰雪 Gu; Shirong, 刘世荣 Liu

doi:10.5846/stxb201408121602

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2010, the decrease in solar radiation led to a decrease in vegetation photosynthesis and carbon sequestration capacity, resulting in lower levels of GPP, while an increase in precipitation resulted in higher levels of ET, resulting in a drastic decrease in WUE values. In previous studies, although some regions also showed a downward trend in WUE from 2000 to 2010 (Zhang et al, 2016), most regions showed an overall upward trend in WUE during the study period and did not show a significant segmented trend (Zhao et al, 2019;Luo et al, 2022). This is related to the differences in geographical location, meteorological conditions, and human activity interference in the study area.…”

Section: Spatial and Temporal Distribution Of Wuementioning

confidence: 59%

Spatial and temporal variations of vegetation water use efficiency and its response to climate change and human activities in the West Liao River Plain, China

Gao,

Liu,

Liu

et al. 2023

Front. Ecol. Evol.

View full text Add to dashboard Cite

Water use efficiency [WUE = gross primary production (GPP)/evapotranspiration (ET)] is an important indicator of the degree of coupling between carbon and water cycles in ecosystems. However, the response of the carbon and water cycles to climate change and human activities,as well as the underlying driving mechanisms in the West Liao River Plain (WLRP), a typical farming–pasturing ecotone in northern China, remain unclear. This study examined the temporal and spatial variation characteristics of WUE in the WLRP from 2000 to 2020 using linear regression and the coefficient of variation (CV) method based on MODIS GPP and ET datasets. The relationships between WUE, meteorological factors, and human activities as well as the mechanism driving WUE changes were revealed through correlation analyses, residual analysis, and the grey correlation model. The interannual change of WUE from 2000 to 2020 showed a fluctuating but weakly upward trend. The intra-annual change in WUE followed an M-type bimodal trend, with two peaks from May to June and August to September. Areas with increased WUE accounted for 50.82% of the study area, and 11.11% of these showed a significant increasing trend. WUE was mainly positively correlated with temperature and solar radiation and negatively correlated with precipitation and VPD and presented obvious regional differences. Solar radiation had the most significant impact on WUE. WUE change is not entirely driven by climate change, and human activities have also played an important role. In areas where WUE increased, The average contribution rate of climate change was 72.4%, and that of human activities was 27.6%. This study reveals the temporal and spatial dynamics of WUE in the WLRP and highlights the influence of human activities on WUE changes.

show abstract

Section: Spatial and Temporal Distribution Of Wuementioning

confidence: 59%

Spatial and temporal variations of vegetation water use efficiency and its response to climate change and human activities in the West Liao River Plain, China

Gao,

Liu,

Liu

et al. 2023

Front. Ecol. Evol.

View full text Add to dashboard Cite

show abstract

“…Water is not the primary limiting factor for vegetation growth in the NSP [25]. Zhang et al [41] also found an insignificant correlation between WUE and precipitation in mountainous southwestern China. Of note is that wetland is an exception, whose WUE is sensitive to precipitation, especially extreme precipitation indices, based on the results of geographical detectors.…”

Section: Analysis Of Wue Response To Extreme Temperature and Precipit...mentioning

confidence: 99%

Spatiotemporal Variation of Vegetation Water Use Efficiency and Its Response to Extreme Climate in Northwestern Sichuan Plateau

Wang,

Feng,

Cui

et al. 2023

Sustainability

View full text Add to dashboard Cite

The Northwestern Sichuan Plateau, characterised by complex topography, is located on the northeastern edge of the Tibetan Plateau where ecosystems are rapidly changing in response to climate change. However, the spatiotemporal characteristics of water use efficiency (WUE) and its response to climate change remain unclear, especially different responses to changes in climate mean and extremes. In this study, we found that the seasonal variation of WUE for different types of vegetation demonstrates a “unimodal” pattern, with high values during May to September. The variation of WUE is largely dependent on altitude. The annual WUE showed an overall increasing trend from 2001 to 2021 for most types of vegetation, while a decreasing trend was found for wetland, and grassland had a stronger adaptability to altitude and climate change. Mean climatic variables exerted stronger impacts on WUE than climate extremes, and mean temperature change had a stronger impact on WUE than precipitation. However, the synergistic effects of climate extremes and mean climate exerted significant impacts on WUE, with extreme cold events and mean precipitation events generally being unfavourable for an increase in WUE. The WUE of cropland and forest land demonstrated more sensitive responses to climate extremes than other types. The response of the same type of vegetation to climate extremes has obvious regional heterogeneity. However, the diurnal range of temperature, the length of the growing season, and the persistent humidity index had significant influences on the change of WUE for the entire region.

show abstract

“…Investigating WUE can improve our understanding of the coupling mechanism of the carbon and water cycles of terrestrial ecosystems 1 , 2 . Research on WUE has been conducted at different scales, including leaf 3 , 4 , canopy 5 , single plant 6 , stand 7 , community 8 , ecosystem 9 , and landscape scales 10 . Most studies have focused on the leaf scale 11 , because WUE on the leaf scale can reveal the internal water use mechanism of plants and is the basis for WUE on a larger scale.…”

mentioning

confidence: 99%

Seasonal variation in δ13C of Pinus. yunnanensis and Pinus. armandii at different stand ages

Liu

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Seasonal drought is common in Yunnan province, and water is the dominant factor limiting the growth of Pinus. yunnanensis and Pinus. armandii. The water use efficiency (WUE) of the two species is poorly understood. Needles were collected in a plantation (P. yunnanensis and P. armandii mixed forest) in four seasons, and the needle δ13C values were measured. The selected species had larger δ13C values and exhibited higher WUE than typical subtropical species. P. armandii needles showed a more conservative water use strategy (high WUE) than P. yunnanensis. There were significant differences in the δ13C values of P. armandii between the two ages, whereas no difference was observed in the δ13C values of P. yunnanensis. The lowest δ13C value in the young P. armandii forest was observed in spring, whereas the δ13C value of middle-aged forests did not differ between the seasons. The δ13C value of young P. yunnanensis forests showed no difference in the four seasons, and the maximum value was observed in summer in middle-aged forests. In general, the δ13C value of P. armandii was lowest in spring, whereas that of P. yunnanensis was higher in spring and winter. The needle δ13C values were lower in spring and winter, indicating that the season had different effects on the δ13C values of different tree species. Correlation analysis between the needle δ13C values and meteorological data indicated that temperature and precipitation were the dominant factors affecting WUE in P. yunnanensis and P. armandii. The effect of temperature on WUE was greater in P. yunnanensis middle-aged forests. The identification and selection of subtropical tree species with high WUE are critical to maintaining high levels of forest benefits under limited water conditions.

show abstract

Temporal-spatial variation of WUE and its response to climate change in alpine area of southwestern China

Cited by 3 publications

References 0 publications

Spatial and temporal variations of vegetation water use efficiency and its response to climate change and human activities in the West Liao River Plain, China

Spatial and temporal variations of vegetation water use efficiency and its response to climate change and human activities in the West Liao River Plain, China

Spatiotemporal Variation of Vegetation Water Use Efficiency and Its Response to Extreme Climate in Northwestern Sichuan Plateau

Seasonal variation in δ13C of Pinus. yunnanensis and Pinus. armandii at different stand ages

Contact Info

Product

Resources

About