Qiang Liu, Liqiao Liang, Jianfei Wu, Jifa Qin, Tao Sun, Haitao Wu, Denghua Yan
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引用次数: 0
Abstract
Global warming tends to alter vegetation phenology and prolong the growing season. However, the influence of permanent and intermittent inundation on wetland vegetation responses to climate warming remains uncertain. In this study, we explored the phenological dynamics of wetland vegetation-specifically the start of the growing season (SOS) and end of the growing season (EOS)-across Northeast China from 2001 to 2020 using satellite-derived normalized difference vegetation index (NDVI) data. The SOS and EOS are regulated by the complex interactions among water (represented by precipitation, Pre), air temperature (Ta), and net radiation (Rn). For example, both SOS and EOS have been generally brought forward for both intermittent and permanently inundated wetlands. Unexpectedly, the SOS was delayed by the Pre increase, whereas asymmetrical trends were observed for the response of the SOS to changes in Ta for permanently and intermittently inundated wetlands, which was advanced by increased Ta in permanently inundated wetlands but delayed by increased Ta in intermittently inundated wetlands, with the opposite patterns observed under other conditions. Furthermore, the response of the SOS to the Rn threshold further validated that when hydrological status was not a limiting factor, the effects of Ta and Rn played vital roles in regulating the SOS. For permanently inundated wetlands, the SOS was advanced by the negative effects of Pre, Ta, and Rn. The SOS advancement in intermittently inundated wetlands mainly resulted from the negative effects of Ta and Rn, which offset the positive effects of Pre. For the EOS, the proportions of the contribution of Ta to the change in the EOS reached 0.38 and 0.43 for permanently and intermittently inundated wetlands, respectively, which were greater than the changes in Pre and Rn.
期刊介绍：
The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere.
The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.
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