Joint control of alpine meadow productivity by plant phenology and photosynthetic capacity

Zhang, Tao; Tang, Yuanyuan; Xu, Mingjie; Zhao, Guang; Chen, Ning; Zheng, Zhoutao; Zhu, Juntao; Ji, Ximeng; Wang, Danfeng; Zhang, Yangjian; He, Yongtao

doi:10.1016/j.agrformet.2022.109135

Cited by 15 publications

(7 citation statements)

References 65 publications

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“…The boosting effect of TA on Agreenup was consistent with the global greening and increasing productivity in recent decades due to climate warming [ 17 , 34 , 35 ]. Zhang et al, also reported the positive effect of increasing TA on the seasonal maximal gross primary productivity (GPP max ) based on eddy covariance at an alpine meadow site [ 36 ]. Rising TA can promote plant growth by enhancing enzymatic activity when TA is lower than the optimum temperature [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Climate Controls on the Spatial Variability of Vegetation Greenup Rate across Ecosystems in Northern Hemisphere

Zheng

2022

Plants

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Variations in individual phenological events in response to global change have received considerable attentions. However, the development of phenological stages is relatively neglected, especially based on in situ observation data. In this study, the rate of vegetation greenup (Vgreenup) across the Northern Hemisphere was examined for different plant functional types (PFTs) by using eddy covariance flux data from 40 sites (417 site-years). Then, the controls of climatic variables on the spatial distribution of Vgreenup across PFTs were further investigated. The mean Vgreenup was 0.22 ± 0.11 g C m−2 day−2 across all sites, with the largest and lowest values observed in cropland and evergreen needle-leaf forest, respectively. A strong latitude dependence by Vgreenup was observed in both Europe and North America. The spatial variations of Vgreenup were jointly regulated by the duration of greenup (Dgreenup) and the amplitude of greenup (Agreenup). However, the predominant factor was Dgreenup in Europe, which changed to Agreenup in North America. Spring climatic factors exerted significant influences on the spatial distribution of Vgreenup across PFTs. Specifically, increasing temperature tended to shorten Dgreenup and inhibit Agreenup simultaneously, resulting in an acceleration of Vgreenup. Dryness had a depression effect on Vgreenup for the whole study area, as exhibited by a lower Vgreenup with increasing vapor pressure deficit or decreasing soil moisture. However, Vgreenup in North America was only significantly and positively correlated with temperature. Without the limitation of other climatic factors, the temperature sensitivity of Vgreenup was higher in North America (0.021 g C m−2 day−2 °C−1) than in Europe (0.015 g C m−2 day−2 °C−1). This study provides new cognitions for Vgreenup dynamics from in situ observations in complement to satellite observations, which can improve our understanding of terrestrial carbon cycles.

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Section: Discussionmentioning

confidence: 99%

Climate Controls on the Spatial Variability of Vegetation Greenup Rate across Ecosystems in Northern Hemisphere

Zheng

2022

Plants

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“…Vegetation phenology is sensitive to climate changes, and shifts of vegetation phenology affect the seasonal dynamics of GPP [3,8,9]. Maximum daily GPP (GPP max ) is an important physiological indicator which represents the maximum photosynthetic capacity of vegetation in the growing season [4,10]. Quantifying the impacts of phenological and physiological changes on seasonal vegetation productivity for various Remote Sens.…”

Section: Introductionmentioning

confidence: 99%

“…The spatio-temporal responses of vegetation productivity to phenology may differ among various climatic zones and ecosystem types [22]. Chen et al [23] reported that the increase of vegetation gross primary productivity in the eastern Tibetan Plateau was mainly due to the advance of the SOS rather than the delay of the EOS, whereas Zhang et al [10] found that the delay of the EOS remarkably enhanced the GPP over the period from September to October for broadleaf forests in east China. In addition, a delayed EOS may not lead to a substantial increase of GPP due to weak photosynthetic efficiency and the limited ability of organic matter accumulation in autumn [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Earlier Spring-Summer Phenology and Higher Photosynthetic Peak Altered the Seasonal Patterns of Vegetation Productivity in Alpine Ecosystems

Yang,

Liu,

Chen

et al. 2024

Remote Sensing

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Carbon uptake of vegetation is controlled by phenology and photosynthetic carbon uptake capacity. However, our knowledge of the seasonal responses of vegetation productivity to phenological and physiological changes in alpine ecosystems is still weak. In this study, we quantified the spatio-temporal variations of vegetation phenology and gross primary productivity (GPP) across the source region of the Yellow River (SRYR) by analyzing MODIS-derived vegetation phenology and GPP from 2001 to 2019, and explored how vegetation phenology and maximum carbon uptake capacity (GPPmax) affected seasonal GPP over the region. Our results showed that the SRYR experienced significantly advanced trends (p < 0.05) for both start (SOS) and peak (POS) of the growing season from 2001 to 2019. Spring GPP (GPPspr) had a significantly increasing trend (p < 0.01), and the earlier SOS had obvious positive effects on GPPspr. Summer GPP (GPPsum) was significantly and negatively correlated to POS (p < 0.05). In addition, GPPmax had a significant and positive correlation with GPPsum and GPPann (p < 0.01), respectively. It was found that an earlier spring-summer phenology and higher photosynthetic peak enhanced the photosynthetic efficiency of vegetation in spring and summer and altered the seasonal patterns of vegetation productivity in the SRYR under warming and wetting climates. This study indicated that not only spring and autumn phenology but also summer phenology and maximum carbon uptake capacity should be regarded as crucial indicators regulating the carbon uptake process in alpine ecosystems. This research provides important information about how changes in phenology affect vegetation productivity in alpine ecosystems under global climate warming.

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“…In this case, precipitation becomes the main factor affecting plant growth and development [5,12]. Studies have shown that annual precipitation determines the length of the growing season of sensitive alpine meadow vegetation [13]. The flowering time of plants in Gutian Mountains is obviously seasonal, and most plants bloom in the rainy season [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperature, Precipitation, and CO2 on Plant Phenology in China: A Circular Regression Approach

Tang,

Zhou,

2023

Forests

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Leveraging circular regression, this study analyzed phenological data from China spanning the period 2003 to 2015, meticulously examining the effects of temperature, precipitation, and CO2 concentrations on the phenological patterns of woody and herbaceous plants. For woody plants, the results showed that rising temperatures and increased precipitation notably advanced early growth phases, such as budburst, leaf unfolding, and first flowering (p < 0.001). Specifically, CO2 concentrations had a pronounced impact on the leaf unfolding phase (p < 0.001). In contrast, autumnal events, particularly fruit maturity, autumn coloring, and leaf fall, were delayed by warmer temperatures and higher precipitation (p < 0.001), Of these events, only fruit maturity demonstrated sensitivity to CO2 concentration variations. In the realm of herbaceous plants, elevated temperatures and precipitation collectively hastened the budburst phase (p < 0.001), which is an effect further accentuated by high CO2 levels (p < 0.001). Moreover, rising temperatures and augmented precipitation were instrumental in advancing the flowering phase (p < 0.001). Conversely, warmer conditions slowed down the fruiting process (p < 0.001), with this delay somewhat mitigated by the effects of increased precipitation. Interestingly, while CO2 concentrations had negligible influence on the flowering and fruiting stages, they noticeably delayed seed dispersal and the initiation of senescence (p < 0.001). Overall, the prevailing trend suggests that plants, whether woody or herbaceous in nature, tend to prolong their growth season under warmer and more humid conditions. The influence of CO2 concentration, however, is contingent upon the specific phenological phase and plant type. Our findings emphasize the nuanced and stage-specific responses of plant phenology to temperature, precipitation, and CO2, highlighting the value of using circular regression in ecological studies.

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Joint control of alpine meadow productivity by plant phenology and photosynthetic capacity

Cited by 15 publications

References 65 publications

Climate Controls on the Spatial Variability of Vegetation Greenup Rate across Ecosystems in Northern Hemisphere

Climate Controls on the Spatial Variability of Vegetation Greenup Rate across Ecosystems in Northern Hemisphere

Earlier Spring-Summer Phenology and Higher Photosynthetic Peak Altered the Seasonal Patterns of Vegetation Productivity in Alpine Ecosystems

Effects of Temperature, Precipitation, and CO2 on Plant Phenology in China: A Circular Regression Approach

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