Effects of grazing intensity on diversity and composition of rhizosphere and non‐rhizosphere microbial communities in a desert grassland

Yang, Yang; Zhang, Hao; Liu, Wei; Sun, Jiamei; Zhao, Mengli; Han, Guodong; Pan, Qingmin

doi:10.1002/ece3.10300

Cited by 9 publications

(4 citation statements)

References 64 publications

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“…Livestock play vital role in South Asia and Africa, accounting for up to 40% of their agricultural gross domestic product and being the foundational livelihood of herders in rangeland ecosystems [2]. It has been estimated that 40% of the Earth's land is covered by grasslands, which are mainly used for livestock grazing, and research has shown that light and moderate grazing can improve grassland diversity; however, heavy grazing typically leads to serious degradation [3]. The growth of animal husbandry is hindered by the difficulty of protecting rangeland and a deficiency of forage.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Effects of Long-Term Salinity Stress on the Growth and Physiology of Mono and Mixed Crops

Sharavdorj,

Byambadorj,

Jang

et al. 2024

Agronomy

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Soil salinity is a key factor to limiting agricultural products throughout the world, especially in arid and semi-arid areas, since it intervenes with plant morpho-physiology, resulting in reduced growth and development, as well as disruption of ion homeostasis. This work examined the effects of salinity stress on the mono-cropping of T. pratense, F. arundinacea, and M. sativa and CaSO4 and MgSO4 on the mixed-cropping of T. pratense and F. arundinacea under saline conditions. Plants were assessed by dry weights, physiological parameters (photosynthesis rate, SPAD, SLA), forage quality, and ion concentrations. The biomass of all mono species decreased under salinity, except M. sativa, and mixed cropping was affected less than mono-cropping. The values of the mono-cropping of SPAD were decreased in the long term, and SLA was higher than the control in mixed cropping, with the photosynthesis rate of mono-cropping being higher in medium salinity in the long-term; moreover, CaSO4 and MgSO4 enhanced the photosynthesis rate of mixed cropping. Overall, we concluded that M. sativa is tolerant to medium salinity, and mixed cropping plus MgSO4 and CaSO4 were efficient under salinity stress.

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Section: Introductionmentioning

confidence: 99%

Evaluating the Effects of Long-Term Salinity Stress on the Growth and Physiology of Mono and Mixed Crops

Sharavdorj,

Byambadorj,

Jang

et al. 2024

Agronomy

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“…Generally, light or moderate grazing can improve grassland diversity and productivity, while heavy grazing leads to serious grassland degradation ( Kemp et al., 2013 ; McNaughton, 1979 ). Degradation of grasslands due to overgrazing has emerged as a significant global ecological issue ( Dlamini et al., 2016 ; Eldridge et al., 2017 ; van de Koppel et al., 1997 ; Yang et al., 2023 ). Long-term grazing caused a variety of adaptive evolutionary mechanisms in individual plant growth and morphological characteristics such as plant height ( Liu et al., 2022 ), abundance ( Ridding et al., 2021 ), and biomass ( Hao and He, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Transcriptome and anatomical analysis of Stipa breviflora in response to different grazing intensities in desert steppe

Wang,

Wu,

Dai

et al. 2024

Front. Plant Sci.

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Stipa breviflora is a dominant species in the desert steppe of Northern China. Grazing is the main land use pattern of grassland, which could cause a variety of adaptive evolutionary mechanisms in plant community composition as well as individual plant growth and morphological characteristics. However, very little is known about the morphological structure and transcriptional regulation response to different grazing intensities in S. breviflora. In this study, transcriptome and anatomical analyses of S. breviflora under different grazing intensities, including no grazing, moderate grazing, and heavy grazing, were performed. The anatomical analysis results showed that epidermis cells and xylems significantly thicken with grazing intensity, suggesting that grazing results in increasing lignification. Furthermore, the components of cell walls such as lignin, cellulose, hemicellulose, and pectin were all increased dramatically and significantly under both moderate and heavy grazing. Transcriptome analysis showed that the differentially expressed genes related to different grazing intensities were also engaged in plant cell wall formation and in photosynthesis and respiration. In addition, the activities of ATP synthase and Rubisco-activating enzyme increased significantly with enhanced grazing intensity and differed significantly between moderate and heavy grazing intensities. The trends in transcriptome and plant phenotype changes are consistent. Taken together, these results indicated that S. breviflora has evolved a grazing tolerance strategy under long-term grazing conditions, influencing photosynthesis and respiration in terms of its own structure and enzyme activities in the body, to maintain normal life activities under different grazing conditions.

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“…Microbes are known to exhibit specific adaptations to these varying conditions (Wani et al, 2022 ). By studying their distribution patterns, researchers can gain a better understanding of microbial biodiversity, their ability to adapt to different ecological niches, and their responses to climate change (Yang et al, 2023 ). Soil microbial biogeography is important for understanding biogeochemical cycling and climate feedback of terrestrial ecosystems (Saitta et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Elevational patterns of microbial species richness and evenness across climatic zones and taxonomic scales

Huang,

Su,

Lin

et al. 2023

Ecology and Evolution

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Understanding the elevational patterns of soil microbial diversity is crucial for microbial biogeography, yet the elevational patterns of diversity across different climatic zones, trophic levels, and taxonomic levels remain unclear. In this study, we investigated the elevational patterns of species richness, species evenness and the relationship between species richness and evenness (RRE) in the forest soil bacterial and fungal communities and individual phyla across three climatic zones (tropical, subtropical, and cold temperate). Our results revealed that soil bacterial richness (alpha diversity) decreased with elevation, while fungal richness exhibited a hump‐shaped pattern in the tropical and cold‐temperate forests. Elevational patterns of evenness in bacterial and fungal communities showed the hump‐shaped pattern across climatic zones, except for bacterial evenness in the tropical forest. Both bacterial and fungal richness and evenness were positively correlated in the subtropical and cold‐temperate forests, while negatively correlated for bacteria in the tropical forest. The richness and evenness of soil microorganisms across different regions were controlled by climatic and edaphic factors. Soil pH was the most important factor associated with the variations in bacterial richness and evenness, while mean annual temperature explained the major variations in fungal richness. Our results addressed that the varieties of elevational patterns of microbial diversity in climatic zones and taxonomic levels, further indicating that richness and evenness may respond differently to environmental gradients.

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Effects of grazing intensity on diversity and composition of rhizosphere and non‐rhizosphere microbial communities in a desert grassland

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 9 publications

References 64 publications

Evaluating the Effects of Long-Term Salinity Stress on the Growth and Physiology of Mono and Mixed Crops

Evaluating the Effects of Long-Term Salinity Stress on the Growth and Physiology of Mono and Mixed Crops

Transcriptome and anatomical analysis of Stipa breviflora in response to different grazing intensities in desert steppe

Elevational patterns of microbial species richness and evenness across climatic zones and taxonomic scales

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