Soil Plant Growth-Promoting Bacterial Diversity Changes With Land Use Intensity and Environmental Conditions

IF 6.3 1区环境科学与生态学 Q1 ECOLOGY

Global Ecology and Biogeography Pub Date : 2025-07-13 DOI:10.1111/geb.70092

Syrie M. Hermans, Hannah L. Buckley, Bradley S. Case, Fiona Curran-Cournane, Matthew Taylor, Gavin Lear

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引用次数: 0

Abstract

Aim

Plant growth-promoting bacteria (PGPB) play crucial roles in supporting plant growth and, therefore, in undisturbed ecosystems and agricultural systems. We aimed to understand how these microbial communities change under different land use and environmental conditions. This is an important prerequisite to utilising the positive impact PGPB may have for sustainable food production.

Location

537 sites across Aotearoa New Zealand.

Time Period

2013–2018.

Major Taxa Studied

Plant growth-promoting bacteria (PGPB).

Methods

We surveyed the PGPB in indigenous and exotic plantation forests, sheep and beef grasslands, dairy pastures and horticulture sites.

Results

PGPB community alpha-diversity increased with land use intensity, and the greatest portion of explainable variation in alpha-diversity was accounted for by soil nutrients, metal concentrations, and unexplained spatial patterns. Variation in PGPB community composition, on the other hand, was highest in the forest and horticulture sites and lowest in the grazed pastures. The variation was best accounted for by shared variation among land use, soil nutrients and soil metal concentrations. The relative abundance of nitrogen-fixing PGPB taxa decreased with land use intensity, largely driven by a decrease in Rhizobiales. In contrast, taxa in the order Bacillales, known for phosphate and potassium solubilisation, increased in relative abundance. Key environmental variables limiting the distributions of specific PGPB taxa included soil pH, several nutrients and the concentrations of cadmium and zinc.

Main Conclusions

Overall, we showed that PGPB show distinct patterns in response to land use and soil environmental variables, and these results contribute towards an understanding of the interplay between how we use our soil, their physicochemical properties and the function of the microbial communities within them. This increased understanding of the distribution of PGPB is crucial for advancing our ability to optimise and take advantage of the benefits these bacteria bring to both natural and agricultural land.

Abstract Image

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土壤植物促生长细菌多样性随土地利用强度和环境条件的变化

目的植物生长促进菌（Plant growth promoting bacteria， PGPB）在自然生态系统和农业系统中发挥着重要作用。我们旨在了解这些微生物群落在不同土地利用和环境条件下的变化。这是利用PGPB对可持续粮食生产可能产生的积极影响的重要先决条件。位置537站点横跨新西兰奥特罗阿。时间期限2013-2018年。植物促生长细菌（PGPB）的主要类群研究。方法对国内外人工林、牛羊草场、奶牛场、园艺场等地的PGPB进行调查。结果PGPB群落α多样性随土地利用强度的增加而增加，土壤养分、金属浓度和空间格局对α多样性的影响最大。另一方面，ppgpb群落组成的变化在森林和园艺样地最高，在放牧样地最低。这种变化最好的解释是土地利用、土壤养分和土壤金属浓度之间的共同变化。固氮植物类群的相对丰度随土地利用强度的增加而降低，这主要是由于根瘤菌的减少所致。相比之下，以磷酸盐和钾溶解而闻名的硅藻目分类群的相对丰度增加了。土壤pH值、几种养分和镉、锌的浓度是限制特定植物类群分布的关键环境变量。总体而言，我们发现PGPB对土地利用和土壤环境变量的响应表现出不同的模式，这些结果有助于理解我们如何利用土壤、土壤的理化性质和土壤中微生物群落的功能之间的相互作用。对PGPB分布的进一步了解对于提高我们优化和利用这些细菌给自然和农业土地带来的好处的能力至关重要。

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来源期刊

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.