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Yuan, Zuoqiang; Ali, Arshad; Loreau, Michel; Ding, Fang; Liu, Shufang; Sanaei, Anvar; Zhou, Wangming; Ye, Ji; Lin, Fei; Fang, Shuai; Hao, Zhanqing; Wang, Xugao; Le Bagousse‐Pinguet, Yoann
Global change biology, June 2021, Volume: 27, Issue: 12Journal Article
Biodiversity plays a fundamental role in provisioning and regulating forest ecosystem functions and services. Above‐ground (plants) and below‐ground (soil microbes) biodiversity could have asynchronous change paces to human‐driven land‐use impacts. Yet, we know very little how they affect the provision of multiple forest functions related to carbon accumulation, water retention capacity and nutrient cycling simultaneously (i.e. ecosystem multifunctionality; EMF). We used a dataset of 22,000 temperate forest trees from 260 plots within 11 permanent forest sites in Northeastern China, which are recovering from three post‐logging disturbances. We assessed the direct and mediating effects of multiple attributes of plant biodiversity (taxonomic, phylogenetic, functional and stand structure) and soil biodiversity (bacteria and fungi) on EMF under the three disturbance levels. We found the highest EMF in highly disturbed rather than undisturbed mature forests. Plant taxonomic, phylogenetic, functional and stand structural diversity had both positive and negative effects on EMF, depending on how the EMF index was quantified, whereas soil microbial diversity exhibited a consistent positive impact. Biodiversity indices explained on average 45% (26%–58%) of the variation in EMF, whereas climate and disturbance together explained on average 7% (0.4%–15%). Our result highlighted that the tremendous effect of biodiversity on EMF, largely overpassing those of both climate and disturbance. While above‐ (β = 0.02–0.19) and below‐ground (β = 0.16–0.26) biodiversity had direct positive effects on EMF, their opposite mediating effects (β = −0.22 vs. β = 0.35 respectively) played as divergent pathways to human disturbance impacts on EMF. Our study sheds light on the need for integrative frameworks simultaneously considering above‐ and below‐ground attributes to grasp the global picture of biodiversity effects on ecosystem functioning and services. Suitable management interventions could maintain both plant and soil microbial biodiversity, and thus guarantee a long‐term functioning and provisioning of ecosystem services in an increasing disturbance frequency world. Higher EMF was found in disturbed forests rather than relatively undisturbed mature forests. Above‐and below‐ground biodiversity had direct positive effects on EMF, their opposite mediating effects played as divergent pathways to human disturbance impacts on EMF.
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