Increase in soil aggregate stability along a Mediterranean successional gradient in severely eroded gully bed ecosystems: combined effects of soil, root traits and plant community characteristics

Erktan, Amandine; Cécillon, Lauric; Graf, Frank; Roumet, Catherine; Legoût, Cédric; Rey, Freddy

doi:10.1007/s11104-015-2647-6

Cited by 165 publications

(96 citation statements)

References 91 publications

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“…In WG treatment, the grazing and extra deposition of manure by yak improved the soil fertility and accelerate C and N cycling in the grassland (Kohler et al, ; Peacock Ag et al, ) possibly by the provision of large quantities of high‐quality organic matter (Devi, Yadava, & Garkoti, ), by indirectly affecting soil moisture and temperature and in turn alternating decomposition and mineralization rates (Olsen et al, ), as well as due to the relatively high biomass production and biodiversity of grass plants (Schwabe et al, ; Seifert et al, ). The high biodiversity of grass community in WG (our unpublished data) can promote greater SOC accumulation than native ecosystems (Erktan et al, ). However, the failure of GE treatment in improving the soil nutrition pool in comparison with the control was different from the results in several previous studies at the Loess Plateau (Deng et al, ) and at the semiarid Horqin Sandy Land (Li et al, ).…”

Section: Discussioncontrasting

confidence: 94%

Impacts of wise grazing on physicochemical and biological features of soil in a sandy grassland on the Tibetan Plateau

et al. 2019

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Desertification is a serious environmental problem on the Tibetan Plateau and various strategies, such as long‐term fencing and grazing management, have been implemented in that region to control the soil degradation. However, little is known about the role of interactions among the soil aggregate, microbial communities, and nutrient traits in the soil restoration. In this study, we compared the effects of different restoration strategies on the formation of aggregates, the amount and distribution of soil nutrients, as well as the abundance and diversity of bacteria in a sandy soil of grassland at the Tibetan Plateau. The results demonstrated that both the grazing exclusion (GE: artificial planting and nutrient addition) and wise grazing (WG: artificial planting and nutrient addition with controlled grazing) treatments significantly increased the proportion of macroaggregates (4.0‐and 5.2‐ times, p < 0.05) compared with the control. Increased soil organic carbon, total carbon, total nitrogen, and total phosphorus were found in the aggregates of WG treatment, but not in the GE samples. In addition, WG significantly changed the bacterial composition and increased bacterial abundance in soil. This study evaluated WG as an efficient management for restoration of degraded sandy grassland in the Tibetan Plateau because it significantly enriched the soil nutrients, improved the soil structure, and increased bacterial abundance. This is the first study to relate the aggregates with nutrient accumulation and bacterial community during the soil restoration in the Tibetan Plateau.

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Section: Discussioncontrasting

confidence: 94%

Impacts of wise grazing on physicochemical and biological features of soil in a sandy grassland on the Tibetan Plateau

et al. 2019

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“…Experimental knowledge for ecological restoration of marly eroded lands is available through the voluminous research conducted in these areas (Rey, 2009;Erktan et al, 2016;Burylo et al, 2014). These studies have researched gully beds, where vegetation can counter erosive forces and trap sediment Rey and Labonne, 2015).…”

Section: Breton Et Al: Effects Of Wood Chip Amendments On the Revmentioning

confidence: 99%

Effects of wood chip amendments on the revegetation performance of plant species on eroded marly terrains in a Mediterranean mountainous climate (Southern Alps, France)

Breton

Crosaz²,

Rey

2016

Solid Earth

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Abstract. The establishment of plant species can limit soil erosion dynamics in degraded lands. In marly areas in the Southern French Alps, both harsh water erosion and drought conditions in summer due to the Mediterranean mountainous climate prevent the natural implementation and regeneration of vegetation. Soil fertility improvement is sometimes necessary. With the purpose of revegetating such areas, we aimed to evaluate the effects of wood chip amendments on the revegetation performance of different native or subspontaneous plant species. We conducted two experiments on steep slopes over three growing seasons (2012)(2013)(2014). The first consisted of planting seedlings (10 species), and the second consisted of seeding (nine species including six used in the first experiment). First we noted that wood chips were able to remain in place even in steep slope conditions. The planting of seedlings showed both an impact of wood chip amendment and differences between species. A positive effect of wood chips was shown with overall improvement of plant survival (increasing by 11 % on average, by up to 50 % for some species). In the seeding experiment, no plants survived after three growing seasons. However, intermediate results for the first and second years showed a positive effect of wood chips on seedling emergence: seeds of four species only sprouted on wood chips, and for the five other species the average emergence rate increased by 50 %.

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“…High fine root and mycelial hyphae densities improve aggregate stability (Fig. 2) (Wu et al 2014;Erktan et al 2016) through different mechanisms:…”

Section: Introductionmentioning

confidence: 99%

Increasing soil carbon storage: mechanisms, effects of agricultural practices and proxies. A review

Dignac

Derrien

Barré

et al. 2017

Agron. Sustain. Dev.

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363

170

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The international 4 per 1000 initiative aims at supporting states and non-governmental stakeholders in their efforts towards a better management of soil carbon (C) stocks. These stocks depend on soil C inputs and outputs. They are the result of fine spatial scale interconnected mechanisms, which stabilise/destabilise organic matter-borne C. Since 2016, the CarboSMS consortium federates French researchers working on these mechanisms and their effects on C stocks in a local and global change setting (land use, agricultural practices, climatic and soil conditions, etc.). This article is a synthesis of this consortium's first seminar. In the first part, we present recent advances in the understanding of soil C stabilisation mechanisms comprising biotic and abiotic processes, which occur concomitantly and interact. Soil organic C stocks are altered by biotic activities of plants (the main source of C through litter and root systems), microorganisms (fungi and bacteria) and 'ecosystem engineers' (earthworms, termites, ants). In the meantime, abiotic processes related to the soil-physical structure, porosity and mineral fraction also modify these stocks. In the second part, we show how agricultural practices affect soil C stocks. By acting on both biotic and abiotic mechanisms, land use and management practices This synthesis of the CarboSMS French consortium's first seminar was already published in French: Derrien D, Dignac M-F, Basile-Doelsch I, Barot S, Cécillon L, Chenu C, Chevallier T, Freschet GT, Garnier P, Guenet B, Hedde M, Klumpp K, Lashermes G, Maron P-A, Nunan N, Roumet C, Barré P (2016) (choice of plant species and density, plant residue exports, amendments, fertilisation, tillage, etc.) drive soil spatiotemporal organic inputs and organic matter sensitivity to mineralisation. Interaction between the different mechanisms and their effects on C stocks are revealed by meta-analyses and long-term field studies. The third part addresses upscaling issues. This is a cause for major concern since soil organic C stabilisation mechanisms are most often studied at fine spatial scales (mm-μm) under controlled conditions, while agricultural practices are implemented at the plot scale. We discuss some proxies and models describing specific mechanisms and their action in different soil and climatic contexts and show how they should be taken into account in large scale models, to improve change predictions in soil C stocks. Finally, this literature review highlights some future research prospects geared towards preserving or even increasing C stocks, our focus being put on the mechanisms, the effects of agricultural practices on them and C stock prediction models.

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Increase in soil aggregate stability along a Mediterranean successional gradient in severely eroded gully bed ecosystems: combined effects of soil, root traits and plant community characteristics

Cited by 165 publications

References 91 publications

Impacts of wise grazing on physicochemical and biological features of soil in a sandy grassland on the Tibetan Plateau

Impacts of wise grazing on physicochemical and biological features of soil in a sandy grassland on the Tibetan Plateau

Effects of wood chip amendments on the revegetation performance of plant species on eroded marly terrains in a Mediterranean mountainous climate (Southern Alps, France)

Increasing soil carbon storage: mechanisms, effects of agricultural practices and proxies. A review

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