With or without trees: Resistance and resilience of soil microbial communities to drought and heat stress in a Mediterranean agroforestry system

Guillot, Esther; Hinsinger, Philippe; Dufour, Lydie; Roy, Jacques; Bertrand, Isabelle

doi:10.1016/j.soilbio.2018.11.011

Cited by 57 publications

(44 citation statements)

References 67 publications

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“…In TBI systems, water availability controlled competition between Juglans nigra and maize for mineralized N (Jose et al 2000), while fine root dynamics may be largely controlled by climate, as suggested by the differential root elongation rates of J. nigra (Mohamed et al 2018). Under sub-optimal climatic conditions, we know that key microbial communities were more resilient in a temperate TBI system (Furze et al 2017), a Mediterranean agroforestry system (Guillot et al 2019), and a Zanthoxylum bungeanumbased intercropped system (Sun et al 2016). Relationships between root trait expression and microbial communities involved in soil C and N dynamics were reported under droughty conditions (De Vries et al 2016), but much work is needed to elucidate the interactive function of microbial-plant nutrient acquisition patterns in agroforestry systems to achieve resilience under environmental change.…”

Section: Imaging Nutrient Acquisition Structures With Non-destructivementioning

confidence: 99%

Nutrient acquisition strategies in agroforestry systems

2019

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Background Disentangling nutrient acquisition strategies between trees and crops is central to understanding positive nutrient interactions in agroforestry systems for improved low-input agriculture. However, as plants are responsive to a complex soil matrix at multiple scales, generalizable diagnostics across diverse agroforests remains challenging. Scope We synthesize research at various scales of the tree-crop interface that are cumulatively hypothesized to underpin nutrient acquisition strategies in agroforestry systems. These scales span the whole root system to fine-scale sites of acquisition actively engaged in biological and chemical interactions with soil. We target vertical and horizontal dimensions of acquisition patterns; localized root-soil dynamics including biological associations; root-scale plasticity for higher acquisition; and nutrient additions via biological nitrogen fixation and deep soil nutrient uplift. We consolidate methodological advances and the effects of environmental change on wellestablished nutrient interactions. Conclusions Root distribution patterns remain one of the most universal indicators of nutrient acquisition strategies in a range of agroforestry systems, while root functional traits are emerging as an effective root-scale indicator of nutrient acquisition strategy. We validate that in agroforestry systems crop root functional traits reveal bivariate trade-offs similar to, but weaker than, crops in monoculture, with mechanistic links to nutrient acquisition strategies. While interspecific root overlap may be associated with nutrient competition, clear cases of enhanced chemically and microbially meditated processes result in species-and management-specific nutrient facilitation. We argue for agroforestry science to use distinct and standardized nutrient acquisition indicators and processes at multiple scales to generate more nuanced, while also generalizable, diagnostics of tree-crop interactions. And extensive research is needed on how agroforestry practices stabilize key nutrient acquisition patterns in the face of environmental change.

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Section: Imaging Nutrient Acquisition Structures With Non-destructivementioning

confidence: 99%

Nutrient acquisition strategies in agroforestry systems

2019

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“…The microbial community is a sensitive indicator of environmental stress, reflecting even small changes in the geochemical composition of their microhabitat due to anthropogenic activities (Li et al, 2017;Guillot et al, 2019;Hallsworth 2019;Xiao et al, 2019). Microorganisms play a major role in element cycling as well as the weathering of rocks and sediments (Bennett et al, 2001;Jaswal et al, 2019a).…”

Section: Microbial Diversity and Activity In Radionuclidecontaminated Sitesmentioning

confidence: 99%

Microbial interaction with and tolerance of radionuclides: underlying mechanisms and biotechnological applications

López-Fernández

Jroundi

Ruiz-Fresneda

et al. 2020

Microbial Biotechnology

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Radionuclides (RNs) generated by nuclear and civil industries are released in natural ecosystems and may have a hazardous impact on human health and the environment. RN-polluted environments harbour different microbial species that become highly tolerant of these elements through mechanisms including biosorption, biotransformation, biomineralization and intracellular accumulation. Such microbial-RN interaction processes hold biotechnological potential for the design of bioremediation strategies to deal with several contamination problems. This paper, with its multidisciplinary approach, provides a state-of-theart review of most research endeavours aimed to elucidate how microbes deal with radionuclides and how they tolerate ionizing radiations. In addition, the most recent findings related to new biotechnological applications of microbes in the bioremediation of radionuclides and in the long-term disposal of nuclear wastes are described and discussed.

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“…The soil of this site was therefore probably more directly subjected to climatic disturbances than the soil of the restored sites. In addition, vegetation could delay pedoclimatic conditions (e.g., temperature and humidity) and lead to spatial heterogeneity in nutrient utilization, which was favourable for microbial communities (Guillot, Hinsinger, Dufour, Roy, & Bertrand, 2019). Therefore, the results suggested that vegetation restoration was beneficial for the input of labile substrate and accumulation of soil nutrients.…”

Section: Effect Of Vegetation Restoration On the Soil Microbial Communitiesmentioning

confidence: 97%

The response of soil microbial communities to soil erodibility depends on the plant and soil properties in semiarid regions

et al. 2021

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Natural succession and afforestation are the two main restoration methods of degraded soil in semiarid and arid regions. Up to now, the soil microbial communities and their roles in soil erodibility have been unclear. Our work aimed to evaluate the effects of ecological restoration on the diversity and composition of soil microbial communities at depths of 0-20 cm and their interaction with soil erodibility. Four main restoration types, natural succession land and Pinus tabuliformis, Armeniaca sibirica, and Robinia pseudoacacia plantations were chosen. Restoration with different vegetation communities decreased the soil erodibility K-factor (K) by 13.37-20.64%. Proteobacteria, Acidobacteria, and Actinobacteria were dominant bacterial phyla at all sites. The dominant fungal phyla were Basidiomycota, Ascomycota, and Zygomycota. However, there were obvious differences in bacterial and fungal communities among restoration types due to variations in plant and soil properties.Redundancy analysis showed that the soil microbial communities explained 67.30%

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With or without trees: Resistance and resilience of soil microbial communities to drought and heat stress in a Mediterranean agroforestry system

Cited by 57 publications

References 67 publications

Nutrient acquisition strategies in agroforestry systems

Nutrient acquisition strategies in agroforestry systems

Microbial interaction with and tolerance of radionuclides: underlying mechanisms and biotechnological applications

The response of soil microbial communities to soil erodibility depends on the plant and soil properties in semiarid regions

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