Influence of land‐use changes on microbial community structure and diversity in a semiarid region

Vázquez, Carolina; Verdenelli, Romina Aylén; Merlo, Carolina; Brandán, Carolina Pérez; Kowaljow, Esteban; Meriles, José Manuel

doi:10.1002/ldr.4416

Cited by 4 publications

(1 citation statement)

References 73 publications

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“…These communities contribute significantly to plant growth and hold agricultural potential in nutrient-deficient regions, making their comprehension essential for restoring rangeland ecosystems [15]. Moreover, environmental changes profoundly impact microbial communities, influencing ecosystem resistance and vegetation productivity [16,17]. These communities also play a role in plant survival under extreme conditions and the phytostabilization of mine tailings [6,18].…”

Section: Microbial Community Associated With Arid and Semiarid Region...mentioning

confidence: 99%

Rhizosphere engineering for semiarid tropics: prospects and bottlenecks

Yadav,

Ahmad

2023

Academia Biology

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Rhizosphere engineering is a cutting-edge biotechnological approach, strategically employing microbial biofertilizers, phytostimulants, and plant growth promoting rhizobacteria (PGPR) to boost agricultural crop productivity. Unlike conventional chemical fertilizers, this method eliminates harmful substances, mitigating environmental and health concerns. The foundation of rhizosphere engineering lies in the intricate study of plant-microbe interactions, where soil microorganisms play a pivotal role in nutrient cycling, agricultural waste decomposition, and plant growth stimulation. Rhizosphere engineering shows immense promise in the semiarid tropics, covering around 26% of the Earth's ecology and characterized by water scarcity and high temperatures. Microorganisms found in the rhizosphere, endosphere, and vegetation of arid plants have adapted to harsh environmental conditions, offering valuable resources for biofertilizer and biocontrol research. Their application in enhancing water and nutrient absorption can help alleviate water stress, contributing to sustainable crop production in these regions. However, fully realizing the potential of rhizosphere engineering presents numerous challenges. Identifying beneficial microorganisms, establishing standardized protocols, comprehending complex plantmicrobe-soil interactions, and developing efficient delivery systems for microbial inoculants are among the bottlenecks that must be addressed. These challenges underscore the need for continuous research and innovation in this field. Despite being in its infancy, rhizosphere engineering has already accumulated a wealth of information and insights. By surmounting existing challenges and harnessing the power of PGPR and other rhizosphere microorganisms, rhizosphere engineering may usher in a new era in agriculture, particularly benefiting the water-stressed regions of the semiarid tropics.

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Section: Microbial Community Associated With Arid and Semiarid Region...mentioning

confidence: 99%

Rhizosphere engineering for semiarid tropics: prospects and bottlenecks

Yadav,

Ahmad

2023

Academia Biology

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Dynamic Impact of One-Year Integrated Rice–Crayfish Farming on Bacterioplankton Communities in Paddy Water

Hou,

Xu,

Yang

et al. 2024

Biology

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As global food security issues become increasingly severe, an important innovation in agricultural production patterns, namely integrated rice–fish farming, has been widely implemented around the world, especially in Asia. To assess the impact of integrated rice–crayfish (Procambarus clarkii) farming (IRCF) on agricultural ecosystems, we used Illumina high-throughput 16S rRNA gene sequencing to analyze differences in diversity, composition, co-occurrence network, and assembly process of planktonic bacterial communities in paddy water between traditional rice farming (TRM) and IRCF. Environmental factors and planktonic bacterial communities were evaluated during the tillering, jointing, flowering, and grain-filling stages on August 24, September 5, September 24, and October 16, respectively. Our findings revealed that, throughout the entire cultivation period, IRCF had no notable impacts on bacterioplankton community diversity in paddy water, but it changed the composition and relative abundance of the dominant bacterioplankton. Specifically, IRCF promoted the Chloroflexota during the tillering stage but reduced its presence during the grain-filling stage. It also significantly decreased the Bacillota during the jointing stage while notably enhancing Actinomycetota during the flowering stage. Furthermore, IRCF markedly improved the robustness and negative/positive cohesion within bacterioplankton co-occurrence networks during jointing and grain-filling stages. IRCF altered the assembly processes shaping planktonic bacterial communities, promoting a greater dominance of stochastic processes during the tillering, jointing, and flowering stages and a diminished dominance during the grain-filling stage. IRCF dramatically changed aquatic environmental factors, particularly during the jointing stage, by substantially increasing the TN, ammonium, nitrate, and phosphate levels in paddy water. These nutrient levels were closely correlated with the dynamics of the planktonic bacterial communities. Our findings underscore the considerable potential of IRCF in enhancing the stability of bacterioplankton communities and promoting rice growth while also providing valuable data and theoretical insights into the microbiological ecological impacts of IRCF on the agroecosystem.

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Seasonal Dynamics of Soil Enzymatic Activity under Different Land-Use Types in Rocky Mountainous Region of North China

Kong

Feng

et al. 2023

Forests

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To reveal the effects of different land-use types on soil enzyme activities, soil samples were collected from 0–10, 10–20 and 20–30 cm soil layers to compare and analyze soil β-glucosidase (BG), urease (URE), protease (PROT) and catalase (CAT) activities in farmland (FL), abandoned land (AL) and three plantation forests: Platycladus orientalis (L.) Franco (PO), Robinia pseudoacacia L. (RP) and Quercus variabilis Bl. (QV) in the rocky mountainous region of North China. The results showed that the soil enzyme activities varied significantly under different land-use types, and the interannual mean values of FL and PO were remarkably higher than those of other land uses in the 0–30 cm soil layer, in which the soil BG and URE activities of FL were 22% and 12% higher than those of AL, and 428% and 179% higher than those of QV, respectively; the soil PROT and CAT activities of PO were 66% and 23% higher than those of AL, and 479% and 113% higher than those of QV, respectively. Soil BG, URE and PROT activities were all higher in June and lower in December, while soil CAT activity was slightly lower in June. The soil enzymatic activities all showed a notable decrease with the depth of the soil layer. Soil BG, URE, PROT and CAT activities were remarkably (p < 0.01) or significantly (p < 0.05) positively correlated with available nitrogen, available phosphorus, available potassium, dissolved organic carbon (DOC), NO3−-N, soil organic carbon, water content, clay and silt volume fraction, and significantly negatively correlated with sand volume fraction. Soil DOC and pH were important factors influencing soil enzymatic activity, implying that changes in soil enzymatic activity under different land-use types may be the result of a combination of temperature, moisture and plant type. In conclusion, PO plantations are conducive to improving the physicochemical and biological properties of soil and enhance soil fertility, which is a reasonable land-use method to achieve sustainable development in the rocky mountainous region of North China.

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Influence of land‐use changes on microbial community structure and diversity in a semiarid region

Cited by 4 publications

References 73 publications

Rhizosphere engineering for semiarid tropics: prospects and bottlenecks

Rhizosphere engineering for semiarid tropics: prospects and bottlenecks

Dynamic Impact of One-Year Integrated Rice–Crayfish Farming on Bacterioplankton Communities in Paddy Water

Seasonal Dynamics of Soil Enzymatic Activity under Different Land-Use Types in Rocky Mountainous Region of North China

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