Carbon and nitrogen dynamics in tropical ecosystems following fire

Jiang, Dalong; Xu, Chao; Xu, Xia; Luo, Yiqi; Chen, Chen; Ju, Chenghui; Chen, Han Y. H.; Shi, Zheng; Ruan, Honghua

doi:10.1111/geb.13422

Cited by 9 publications

(2 citation statements)

References 80 publications

(191 reference statements)

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“…Natural processes (e.g., fire and grazing) impact N cycling in land ecosystems, and these processes are independent of legume effects but are dependent on ecosystem types and/or climatic regions. Frequent fire and disturbances (e.g., grazing) significantly change the cycling and availability of N (Dannenmann et al, 2018; Jiang et al, 2022) and can also remove large quantities of N from unmanaged ecosystems, which stimulates rapid regeneration of N‐fixing species and individuals to replenish N deficits (Batterman et al, 2013; Vitousek et al, 2013). For example, Batterman et al (2013) found that N‐fixers dynamically act to replenish N deficits caused by disturbance events in tropical forests and soils.…”

Section: Discussionmentioning

confidence: 99%

Leguminous plants significantly increase soil nitrogen cycling across global climates and ecosystem types

Gou

Qiu

Shao

et al. 2023

Global Change Biology

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Leguminous plants are an important component of terrestrial ecosystems and significantly increase soil nitrogen (N) cycling and availability, which affects productivity in most ecosystems. Clarifying whether the effects of legumes on N cycling vary with contrasting ecosystem types and climatic regions is crucial for understanding and predicting ecosystem processes, but these effects are currently unknown. By conducting a global meta-analysis, we revealed that legumes increased the soil net N mineralization rate (R min ) by 67%, which was greater than the recently reported increase associated with N deposition (25%). This effect was similar for tropical (53%) and temperate regions (81%) but was significantly greater in grasslands (151%) and forests (74%) than in croplands (−3%) and was greater in in situ incubation (101%) or short-term experiments (112%) than in laboratory incubation (55%) or long-term experiments (37%). Legumes significantly influenced the dependence of R min on N fertilization and experimental factors. The R min was significantly increased by N fertilization in the nonlegume soils, but not in the legume soils. In addition, the effects of mean annual temperature, soil nutrients and experimental duration on R min were smaller in the legume soils than in the nonlegume soils. Collectively, our results highlighted the significant positive effects of legumes on soil N cycling, and indicated that the effects of legumes should be elucidated when addressing the response of soils to plants.

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Section: Discussionmentioning

confidence: 99%

Leguminous plants significantly increase soil nitrogen cycling across global climates and ecosystem types

Gou

Qiu

Shao

et al. 2023

Global Change Biology

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“…Bacterial community composition analyses revealed Proteobacteria as the most dominant phyla in all the twenty sites. Proteobacteria is a common inhabitant in agricultural soils with many studies reporting them as dominant phyla in the rhizosphere ( Rascovan et al., 2016 ; Jiao et al., 2019 ; Bziuk et al., 2021 ) and highlighting their role in biogeochemical cycles of nitrogen and carbon ( Jiang et al., 2022 ). The other major phyla identified in the wheat rhizosphere under present study are Chloroflexi, Actinobacteria, Acidobacteria, Bacteroidetes, Gemmatimonadetes, Verrucomicrobia, Planctomyces, Firmicutes, Cyanobacteria, and Nitrospirae.…”

Section: Discussionmentioning

confidence: 99%

Core microbiota of wheat rhizosphere under Upper Indo-Gangetic plains and their response to soil physicochemical properties

et al. 2023

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Wheat is widely cultivated in the Indo-Gangetic plains of India and forms the major staple food in the region. Understanding microbial community structure in wheat rhizosphere along the Indo-Gangetic plain and their association with soil properties can be an important base for developing strategies for microbial formulations. In the present study, an attempt was made to identify the core microbiota of wheat rhizosphere through a culture-independent approach. Rhizospheric soil samples were collected from 20 different sites along the upper Indo-Gangetic plains and their bacterial community composition was analyzed based on sequencing of the V3-V4 region of the 16S rRNA gene. Diversity analysis has shown significant variation in bacterial diversity among the sites. The taxonomic profile identified Proteobacteria, Chloroflexi, Actinobacteria, Bacteroidetes, Acidobacteria, Gemmatimonadetes, Planctomycetes, Verrucomicrobia, Firmicutes, and Cyanobacteria as the most dominant phyla in the wheat rhizosphere in the region. Core microbiota analysis revealed 188 taxa as core microbiota of wheat rhizosphere with eight genera recording more than 0.5% relative abundance. The order of most abundant genera in the core microbiota is Roseiflexus> Flavobacterium> Gemmatimonas> Haliangium> Iamia> Flavisolibacter> Ohtaekwangia> Herpetosiphon. Flavobacterium, Thermomonas, Massilia, Unclassified Rhizobiaceae, and Unclassified Crenarchaeota were identified as keystone taxa of the wheat rhizosphere. Correlation studies revealed, pH, organic carbon content, and contents of available nitrogen, phosphorus, and iron as the major factors driving bacterial diversity in the wheat rhizosphere. Redundancy analysis has shown the impact of different soil properties on the relative abundance of different genera of the core microbiota. The results of the present study can be used as a prelude to be developing microbial formulations based on core microbiota.

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Effect of fire on microbial necromass carbon content is regulated by soil depth, time since fire, and plant litter input in subtropical forests

Zhou,

Wang,

Chen

et al. 2024

Plant Soil

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Carbon and nitrogen dynamics in tropical ecosystems following fire

Abstract: Aim: Tropical ecosystems have grown increasingly prone to fire over the last century.However, no consensus has yet emerged regarding the effects of fire disturbances on tropical biogeochemical cycles.Location: Tropics.

Cited by 9 publications

References 80 publications

Leguminous plants significantly increase soil nitrogen cycling across global climates and ecosystem types

Leguminous plants significantly increase soil nitrogen cycling across global climates and ecosystem types

Core microbiota of wheat rhizosphere under Upper Indo-Gangetic plains and their response to soil physicochemical properties

Effect of fire on microbial necromass carbon content is regulated by soil depth, time since fire, and plant litter input in subtropical forests

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