Biogeographical Variation in Termite Distributions Alters Global Deadwood Decay

IF 6.3 1区 环境科学与生态学 Q1 ECOLOGY Global Ecology and Biogeography Pub Date : 2024-09-11 DOI:10.1111/geb.13915
Stephanie J. Law, Habacuc Flores-Moreno, Catherine L. Parr, Stephen Adu-Bredu, Katherine Bunney, William K. Cornwell, Fidèle Evouna Ondo, Jeff R. Powell, Gabriel W. Quansah, Mark P. Robertson, Amy E. Zanne, Paul Eggleton
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Abstract

Aim

Termites are a crucial group of macroinvertebrates regulating rates of deadwood decomposition across tropical and subtropical regions. When examining global patterns of deadwood decay, termites are treated as a homogenous group. There exist key biogeographical differences in termite distribution. One such clear distinction is the distribution of fungus-growing termites (FGT, subfamily Macrotermitinae). Considering that climate will have shaped termite distribution and ecosystem processes, we evaluate the roles of termite distribution (presence of FGT) and climate (aridity) on global patterns in deadwood decay.

Location

Between 46° N-43° S and 175° E-85° W.

Time Period

Present (between 2016 and 2021).

Major Taxa Studied

Termites (Blattodea: Termitoidae).

Methods

We add salient data to an existing global dataset on deadwood decomposition, including new data from five existing sites and seven additional African sites. We analyse a dataset spanning six continents, 16 countries and 102 experimental sites. Firstly, we evaluate climatic differences (mean annual temperature, mean annual precipitation and mean annual aridity) between sites with and without FGT. Secondly, using aridity as a single comparative climate metric between sites that accounts for temperature and precipitation differences, we examine the interaction between FGT and aridity on global patterns of termite deadwood discovery and decay through multivariate logistic and linear regressions.

Results

Termite-driven decay and wood discovery increased with aridity; however, responses differed between FGT and NFGT sites. Wood discovery increased with aridity in FGT sites only, suggesting a greater role of FGT to deadwood decay in arid environments. On average, both termite discovery and decay of deadwood were approximately four times greater in regions with FGT compared with regions without FGT.

Main Conclusions

Termite discovery and decay of deadwood is climate dependent, and higher decay may be through greater discovery of deadwood in FGT sites. Inclusion of biogeographical differences in termite distribution could potentially alter current and future global estimates of deadwood turnover.

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白蚁分布的生物地理差异改变了全球枯木腐烂情况
白蚁是调节热带和亚热带地区枯木分解率的重要大型无脊椎动物。在研究全球枯木腐烂模式时,白蚁被视为一个同质群体。白蚁的分布存在着关键的生物地理差异。其中一个明显的区别是真菌生长白蚁(FGT,大白蚁亚科)的分布。考虑到气候会影响白蚁的分布和生态系统过程,我们评估了白蚁分布(FGT 的存在)和气候(干旱)对全球枯木腐烂模式的作用。
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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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