首页|Environmental filtering controls soil biodiversity in wet tropical ecosystems

Environmental filtering controls soil biodiversity in wet tropical ecosystems

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  • NSTL
  • Elsevier
? 2022The environmental factors controlling soil biodiversity along resource gradients remain poorly understood in wet tropical ecosystems. Aboveground biodiversity is expected to be driven by changes in nutrient availability in these ecosystems, however, much less is known about the importance of nutrient availability in driving soil biodiversity. Here, we combined a cross-continental soil survey across tropical regions with a three decades' field experiment adding nitrogen (N) and phosphorus (P) (100 kg N ha?1y?1 and 100 kg P ha?1y?1) to Hawai'ian tropical forests with contrasting substrate ages (300 and 4,100,000 years) to investigate the influence of nutrient availability to explain the biodiversity of soil bacteria, fungi, protists, invertebrates and key functional genes. We found that soil biodiversity was driven by soil acidification during long-term pedogenesis and across environmental gradients, rather than by nutrient limitations. In fact, our results showed that experimental N additions caused substantial acidification in soils from Hawai'i. These declines in pH were related to large decreases in soil biodiversity from tropical ecosystems in four continents. Moreover, the microbial activity did not change in response to long-term N and P additions. We concluded that environmental filtering drives the biodiversity of multiple soil organisms, and that the acidification effects associated with N additions can further create substantial undesired net negative effects on overall soil biodiversity in naturally tropical acid soils. This knowledge is integral for the understanding and management of soil biodiversity in tropical ecosystems globally.

Hawai'iNitrogenPhosphorusSoil acidificationSoil ageSoil biodiversityTropical soil

Cui H.、Sun W.、Delgado-Baquerizo M.、Vitousek P.M.、Reed S.C.、Sokoya B.、Bamigboye A.R.、Verma J.P.、Mukherjee A.、Penaloza-Bojaca G.F.、Teixido A.L.、Trivedi P.、He J.-Z.、Hu H.-W.、Png K.

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Institute of Grassland Science School of Life Science Northeast Normal University Key Laboratory of Vegetation Ecology Ministry of Education Jilin Songnen Grassland Ecosystem National Observation and Research Station

Departamento de Sistemas Físicos Químicos y Naturales Universidad Pablo de Olavide

Department of Biological Sciences Stanford University

US Geological Survey Southwest Biological Science Center

Global Centre for Land-Based Innovation Western Sydney University

Natural History Museum (Botany Unit). Obafemi Awolowo University

Plant-Microbe Interaction Lab Institute of Environment and Sustainable Development Banaras Hindu University

Laboratório de Sistemática Vegetal Departamento de Botanica Instituto de Ciências Biológicas Universidade Federal de Minas Gerais

Departamento de Botancia e Ecologia Instituto de Biociências Universidade Federal de Mato Grosso

Microbiome Network and Department of Agricultural Biology Colorado State University

Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education School of Geographical Science Fujian Normal University

Department of Earth and Environmental Sciences Michael Smith Building The University of Manchester

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2022

10.1016/j.soilbio.2022.108571

Soil Biology & Biochemistry

Soil Biology & Biochemistry

SCI
ISSN：0038-0717
年,卷(期)：2022.166
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