Divergent Responses of Soil Positive and Negative Priming Effects to Experimental Warming

IF 6.3 1区 环境科学与生态学 Q1 ECOLOGY
Junxia Ding, Yanghui He, Liming Yin, Changjiang Huang, Kui Xue, Shaobin Yan, Ruiqiang Liu, Peng Wang, Xuhui Zhou
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引用次数: 0

Abstract

Aim

The priming effect (PE) refers to changes in the decomposition of native soil organic carbon induced by exogenous carbon inputs. Specifically, an increase in native soil organic carbon decomposition is termed positive PE, whereas a decrease is referred to as negative PE. In this study, we aimed to investigate how positive and negative PE respond to experimental warming and the factors controlling these responses at a global scale.

Location

Global.

Time Period

2008–2025.

Major Taxa Studied

Soil organic matter priming.

Methods

We conducted a global meta-analysis combining 370 paired observations globally and calculated effect sizes (d) of experimental warming on soil positive and negative PE separately using the Hedge's d approach.

Results

Experimental warming induced a significant negative effect on soil PE. Further, positive and negative PE responded differently to increasing temperature: warming decreased positive PE and increased negative PE, lowering the effect size (d) of warming on overall PE. Soil pH and clay content had the strongest influence on variance in positive and negative PE under warming, respectively. The effect of warming on PE varied with ecosystem type: positive PE was more strongly inhibited in forests and croplands compared to grasslands, whereas warming significantly decreased the magnitude of negative PE in grasslands.

Main Conclusions

Our study reveals distinct responses of positive and negative PE to experimental warming, suggesting that PE may be lower under warming, with the effect size (d) depending on PE direction and ecosystem type. These findings highlight the importance of distinguishing positive from negative PE to improve predictions of soil organic carbon dynamics under climate warming.

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来源期刊
Global Ecology and Biogeography
Global Ecology and Biogeography 环境科学-生态学
CiteScore
12.10
自引率
3.10%
发文量
170
审稿时长
3 months
期刊介绍: Global Ecology and Biogeography (GEB) welcomes papers that investigate broad-scale (in space, time and/or taxonomy), general patterns in the organization of ecological systems and assemblages, and the processes that underlie them. In particular, GEB welcomes studies that use macroecological methods, comparative analyses, meta-analyses, reviews, spatial analyses and modelling to arrive at general, conceptual conclusions. Studies in GEB need not be global in spatial extent, but the conclusions and implications of the study must be relevant to ecologists and biogeographers globally, rather than being limited to local areas, or specific taxa. Similarly, GEB is not limited to spatial studies; we are equally interested in the general patterns of nature through time, among taxa (e.g., body sizes, dispersal abilities), through the course of evolution, etc. Further, GEB welcomes papers that investigate general impacts of human activities on ecological systems in accordance with the above criteria.
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