State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, 712100, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China.
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, 712100, China.
J Environ Manage. 2019 Sep 15;246:668-678. doi: 10.1016/j.jenvman.2019.06.054. Epub 2019 Jun 16.
Ongoing climatic changes induced by human activities increases in atmospheric carbon dioxide (CO), which have considerable effects on the structure and function of ecosystems, including carbon (C) storage, plant functional traits and therefore on a wide set of ecosystem services. Plant functional diversity is benefit to improve plant photosynthesis and enhance C efficiency and therefore decrease CO. Here, the focus of this article is on integrating of plant functional diversity and C storage, which aims to contribute to C sequestration for climate change mitigation following vegetation restoration in Loess Plateau, China. Firstly, the CWM (plant community-weighted mean) traits of the most abundant plant species can account for C storage in AGBC (above-ground biomass C), ALC (above-ground litter C), STC (soil total carbon) and TEC (total ecosystem carbon). Secondly, the CWM of plant height and LCC (leaf carbon concentration) had a positive effect C storage in different part (AGBC, ALC, STC and TEC), while the CWM of LNC (leaf nitrogen concentration) and SLA (specific leaf area) had a negative effect on C storage in different part. Further, the CWM of plant height, LCC, SLA and plant functional dispersion (FDis) can be used to predict C storage by multiple linear regression analysis. Finally, the positive association between FDis and C storage was found in SEM, shedding light on the key role of plant functional diversity driving C storage following vegetation restoration. The findings presented here highlight the importance of both plant traits of dominant species and plant functional diversity in regulating C storage, and show that favorable climate conditions, particularly vegetation restoration, tend to increase C storage and plant functional diversity, which have important implications for improving global C cycling and ecosystem services.
人类活动引起的持续气候变化导致大气中二氧化碳（CO）增加，这对包括碳（C）储存、植物功能特征在内的生态系统结构和功能产生了相当大的影响，进而对广泛的生态系统服务产生影响。植物功能多样性有利于提高植物光合作用，增强 C 效率，从而减少 CO。在这里，本文的重点是整合植物功能多样性和 C 储存，旨在为气候变化减缓做出贡献，具体措施是在中国黄土高原进行植被恢复以实现 C 封存。首先，最丰富植物物种的 CWM（植物群落加权均值）特征可以解释 AGBC（地上生物量 C）、ALC（地上凋落物 C）、STC（土壤总碳）和 TEC（总生态系统碳）中的 C 储存。其次，植物高度和 LCC（叶碳浓度）的 CWM 对不同部分（AGBC、ALC、STC 和 TEC）的 C 储存有积极影响，而 LNC（叶氮浓度）和 SLA（比叶面积）的 CWM 对不同部分的 C 储存有消极影响。此外，通过多元线性回归分析，植物高度、LCC、SLA 和植物功能离散度（FDis）的 CWM 可以用于预测 C 储存。最后，在 SEM 中发现 FDis 与 C 储存之间存在正相关关系，这表明植物功能多样性在植被恢复后对 C 储存的驱动作用关键。本文的研究结果强调了优势种植物特征和植物功能多样性在调节 C 储存方面的重要性，并表明有利的气候条件，特别是植被恢复，往往会增加 C 储存和植物功能多样性，这对改善全球碳循环和生态系统服务具有重要意义。
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