Hard to predict! No clear effects of home-field advantage on leaf litter decomposition in tropical heath vegetation

IF 1 4区环境科学与生态学 Q4 ECOLOGY Journal of Tropical Ecology Pub Date : 2022-10-12 DOI:10.1017/s0266467422000384

M. Alencar, A.P.O. Belo, J. L. A. Silva, A. E. Asato, Eduarda F. Gomes, Valéria S. de Oliveira, Jesiel de O. Teixeira, Otávio de S. Monte, Adriano S. Mota, Vitória M. L. Pereira, Sibele S. Dantas, G. H. S. Silva, B. Goto, A. F. Souza, Adriano Caliman

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引用次数: 2

Abstract

The home-field advantage (HFA) hypothesis establishes that plant litter decomposes faster at ‘home’ sites than in ‘away’ sites due to more specialized decomposers acting at home sites. This hypothesis has predominantly been tested through ‘yes or no’ transplanting experiments, where the litter decomposition of a focal species is quantified near and away from their conspecifics. Herein, we evaluated the occurrence and magnitude of home-field effects on the leaf litter decomposition of Myrcia ramuliflora (O.Berg) N. Silveira (Myrtaceae) along a natural gradient of conspecific litterfall input and also if home-field effects are affected by litter and soil traits. Litter decomposition of M. ramuliflora was assessed through litterbags placed in 39 plots in a tropical heath vegetation over a period of 12 months. We also characterized abiotic factors, litter layer traits, and litter diversity. Our results indicated the occurrence of positive (i.e. Home-field advantage) and negative (i.e. Home-field disadvantage) effects in more than half of the plots. Positive and negative effects occurred in a similar frequency and magnitude. Among all predictors tested, only the community weighted mean C/N ratio of the litterfall input was associated with home-field effects. Our results reinforce the lack of generality for home-field effects found in the literature and thus challenge the understanding of litter-decomposer interaction in tropical ecosystems.

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很难预测!主场优势对热带荒原植被凋落叶分解的影响不明显

主场优势（HFA）假说表明，由于更专业的分解者在主场发挥作用，植物垃圾在“主场”的分解速度比在“客场”更快。这一假设主要通过“是或否”移植实验进行了验证，在移植实验中，对焦点物种的枯枝落叶分解在其同种附近和远离其同种的地方进行了量化。在此，我们评估了家地效应对杨梅（O.Berg）N.Silveira（Myrtacee）落叶分解的发生率和大小，以及家地效应是否受到落叶和土壤特征的影响。在12个月的时间里，通过将垃圾袋放置在热带荒原植被中的39个地块上，对分枝杆菌的垃圾分解进行了评估。我们还对非生物因素、枯枝落叶层特征和枯枝落叶多样性进行了表征。我们的结果表明，超过一半的地块出现了积极（即主场优势）和消极（即主场劣势）效应。积极影响和消极影响的发生频率和程度相似。在所有测试的预测因子中，只有群落加权平均产仔数C/N比与家庭田间效应相关。我们的研究结果强化了文献中家庭场效应的普遍性，从而挑战了对热带生态系统中垃圾-分解者相互作用的理解。

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来源期刊

Journal of Tropical Ecology 环境科学-生态学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

18-36 weeks

期刊介绍： Journal of Tropical Ecology aims to address topics of general relevance and significance to tropical ecology. This includes sub-disciplines of ecology, such as conservation biology, evolutionary ecology, marine ecology, microbial ecology, molecular ecology, quantitative ecology, etc. Studies in the field of tropical medicine, specifically where it involves ecological surroundings (e.g., zoonotic or vector-borne disease ecology), are also suitable. We also welcome methods papers, provided that the techniques are well-described and are of broad general utility. Please keep in mind that studies focused on specific geographic regions or on particular taxa will be better suited to more specialist journals. In order to help the editors make their decision, in your cover letter please address the specific hypothesis your study addresses, and how the results will interest the broad field of tropical ecology. While we will consider purely descriptive studies of outstanding general interest, the case for them should be made in the cover letter.