Publications

Zhang, JQ; Zhao, ML; Ma, R; Feng, MM; Ding, C; Wu, LY; Lu, XG; Shen, XJ; Jiang, M (2025). Different impacts of temperature and precipitation on vegetation net primary production of global marsh wetlands. GLOBAL AND PLANETARY CHANGE, 252, 104893.

Abstract
Until recently, the spatial-temporal changes and driving factors of vegetation net primary productivity (NPP) in global marsh wetlands remain unclear. Based on climate and MODIS NPP data, this study investigated the spatial-temporal variations of NPP and their response to climate variations in global marshes. The results indicated that annual NPP of global unchanged marshes showed a significant upward trend (16.1 g C.m-2/10a) during 2000-2022. The impacts of climate variations on marsh vegetation NPP exhibited different patterns in different regions. Annual temperature warming significantly increased NPP in global marshes, and this positive effect gradually weakened in warmer regions. We further found that the positive effects of daytime and nighttime warming on increasing NPP were asymmetric, with daytime warming having a more significant positive impact. At cold, high northern latitudes, the asymmetric positive impact was more significant. However, at hot low latitudes, the results were opposite: warming temperatures had asymmetric negative effects on marsh vegetation NPP. For the impacts of precipitation, precipitation had insignificant influence on global marsh NPP. But at arid mid-latitudes, increasing precipitation significantly increased marsh vegetation NPP, and the increasing effect gradually strengthened in warmer regions. Our results indicate that even in marsh with abundant water, the vegetation is also limited by available water in relatively arid environments. This study highlights different impacts of temperature and precipitation on marsh vegetation NPP in different regions, and suggests that the asymmetric effects of daytime and nighttime warming should be considered in ecosystem model simulations of global marsh vegetation productivity.

DOI:
10.1016/j.gloplacha.2025.104893

ISSN:
1872-6364