A simple dynamic equilibrium model shows that high phosphatase activity in tropical forest soils could be explained by rapid microbial turnover

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2023-09-01 DOI:10.1016/j.pedobi.2023.150890

Taiki Mori

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引用次数: 0

Abstract

Microorganisms and plant roots secrete phosphatase to obtain phosphorus (P) by degrading organic P. Previous studies have reported high phosphatase activity in tropical forest soils, which has been attributed to poor soil P conditions. However, rapid microbial turnover in tropical forest soils can also contribute to the high soil phosphatase activity. To test this, a simplified dynamic equilibrium model was developed. This model was intentionally designed to exclude the pathways of P originating from rock weathering or P adsorption by soils, with the aim of assessing the specific effect of accelerated microbial turnover on soil phosphatase activity. This model showed that accelerated microbial turnover consistently leads to elevated phosphatase activity, irrespective of the parameters, under the assumed environmental condition with the same litter P input. This suggests that rapid soil microbial turnover may serve as another crucial factor contributing to the high phosphatase activity in tropical forest soils, where both moisture and temperature are high.

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一个简单的动态平衡模型表明，热带森林土壤的高磷酸酶活性可以用快速的微生物周转来解释

微生物和植物根系分泌磷酸酶，通过降解有机磷来获取磷(P)。先前的研究报道了热带森林土壤中磷酸酶的高活性，这被归因于土壤P条件差。然而，热带森林土壤中快速的微生物周转也有助于土壤磷酸酶活性的提高。为了验证这一点，建立了一个简化的动态平衡模型。该模型特意排除了岩石风化或土壤吸附磷的途径，目的是评估微生物加速周转对土壤磷酸酶活性的具体影响。该模型表明，在相同凋落物磷输入的假设环境条件下，无论参数如何，微生物周转加速都会导致磷酸酶活性升高。这表明，土壤微生物的快速周转可能是热带森林土壤中磷酸酶活性高的另一个关键因素，那里的湿度和温度都很高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.