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Title: Environmental filtering controls soil biodiversity in wet tropical ecosystems
Authors: Cui, Haiying
Vitousek, Peter M.
Reed, Sasha C.
Sun, Wei
Sokoya, Blessing
Bamigboye, Adebola R.
Verma, Jay Prakash
Mukherjee, Arpan
Peñaloza-Bojacá, Gabriel F. Pe
Teixido, Alberto L.
Trivedi, Pankaj
He, Ji-Zheng
Hu, Hang-Wei
Png, Kenny Guochen
Delgado-Baquerizo, Manuel
Keywords: Social sciences::Geography
Issue Date: 2022
Source: Cui, H., Vitousek, P. M., Reed, S. C., Sun, W., Sokoya, B., Bamigboye, A. R., Verma, J. P., Mukherjee, A., Peñaloza-Bojacá, G. F. P., Teixido, A. L., Trivedi, P., He, J., Hu, H., Png, K. G. & Delgado-Baquerizo, M. (2022). Environmental filtering controls soil biodiversity in wet tropical ecosystems. Soil Biology and Biochemistry, 166, 108571-.
Journal: Soil Biology and Biochemistry
Abstract: The 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.
ISSN: 0038-0717
DOI: 10.1016/j.soilbio.2022.108571
Schools: Asian School of the Environment 
Rights: © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles

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