Soil organic matter dynamics and microbial metabolism along an altitudinal gradient in Highland tropical forests

Jasso-Flores, Isela; Galicia, Leopoldo; Chávez‐Vergara, Bruno; Merino, Agustı́n; Tapia-Torres, Yunuen; Oliva, Felipe García

doi:10.1016/j.scitotenv.2020.140143

Cited by 21 publications

(7 citation statements)

References 71 publications

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“…This highlights the fact that A. religiosa has an important role in the definition of chemical composition despite its loss of dominance. It can also explain the consistency between the data observed in the Hm condition and other sacred fir forests (Alvarado-Rosales 1989, Galicia et al 2016, Peña-Mendoza et al 2017, Jasso-Flores et al 2020. Vergutz et al (2012) showed that green and senescent foliar tissues in conifers present a lower P concentration and higher C:P ratio than deciduous angiosperms.…”

Section: Discussionsupporting

confidence: 52%

“…Vergutz et al (2012) showed that green and senescent foliar tissues in conifers present a lower P concentration and higher C:P ratio than deciduous angiosperms. In contrast, we observed that foliar tissues generated by A. religiosa in the Hm condition had higher or similar P concentrations compared to angiosperms such as those present in the Ht condition (Alvarado-Rosales 1989, Aguilar-Rodríguez & Barajas-Morales 2005, Domínguez-Bernal 2011, Peña-Mendoza et al 2017, Jasso-Flores et al 2020. Meanwhile, the foliar tissues of Pinus sp.…”

Section: Discussionmentioning

confidence: 68%

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Tree stratum alteration decreases C use efficiency and the stability of litter decomposition in a sacred fir ( Abies religiosa ) forest

Choreño-Parra¹,

Ángeles‐Pérez²,

Villegas-Ríos³

et al. 2022

Bot. Sci.

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Background: There is limited information to predict the direction in which canopy modification affects the microbial carbon use efficiency (CUE) and, consequently, the magnitude and stability of litter decomposition in monodominant sacred fir (Abies religiosa) forests. Questions: What is the effect of tree stratum alteration on CUE and stability of litter decomposition in an A. religiosaforest? Study sites and dates: Two conditions inside a sacred fir forest were selected: A) a naturally monodominant homogeneous condition, and B) a heterogeneous condition with a non-monospecific tree stratum derived from local disturbances (wildfire and reforestation) occurred on a single occasion 18 years ago. Methods: In each condition (homogeneous and heterogeneous), the Importance Value Index (IVI) was calculated in the tree stratum, while chemical composition, microbial carbon (C) concentration, enzyme activities and C mineralization were measured in litter samples. The specific enzymatic activity and the metabolic quotient were calculated as CUE indicators, and the coefficient of variation as a proxy for litter decomposition stability. Results: A change in tree species composition and an increase in tree species richness in the heterogeneous condition was found, which decreased litter phosphorous (P) concentration. This promoted a high microbial activity and low CUE, favoring C mineralization. Furthermore, low stability during litter decomposition was observed as tree species richness increased. Conclusions: Tree stratum heterogeneity, as a consequence of past disturbances, decreases CUE and the stability of litter decomposition in an A. religiosa forest.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 68%

Tree stratum alteration decreases C use efficiency and the stability of litter decomposition in a sacred fir ( Abies religiosa ) forest

Choreño-Parra¹,

Ángeles‐Pérez²,

Villegas-Ríos³

et al. 2022

Bot. Sci.

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“…This result is in line with those obtained by Burke et al [79] who reported that rainfall clearly has a direct role regionally and globally in the amount of soil C and nutrients stored. These patterns indicate that C and nutrient accumulation reflect a strong decrease in decomposition rate with the decrease in MAR reflecting also enrichment in organic matter recalcitrance with decrease in rainfall amount [60,80]. Moreover, the soil basal respiration rates decreased with the decrease in rainfall amount, suggesting a moisture limitation for soil C mineralization.…”

Section: Effects Of Rainfall Regime On Soil Carbon Nitrogen and Phosmentioning

confidence: 87%

Effects of Land Use Change from Natural Forest to Livestock on Soil C, N and P Dynamics along a Rainfall Gradient in Mexico

et al. 2020

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The effects of converting native forests to livestock systems on soil C, N and P contents across various climatic zones are not well understood for the tropical region. The goal of this study was to test how soil C, N and P dynamics are affected by the land-use change from natural forests to livestock production systems (extensive pasture and intensive silvopastoral systems) across a rainfall gradient of 1611–711 mm per year in the Mexican tropics. A total of 15 soil-based biogeochemical metrics were measured in samples collected during the dry and rainy seasons in livestock systems and mature forests for land-use and intersite comparisons of the nutrient status. Our results show that land-use change from natural forests to livestock production systems had a negative effect on soil C, N and P contents. In general, soil basal respiration and C-acquiring enzyme activities increased under livestock production systems. Additionally, reduction in mean annual rainfall affected moisture-sensitive biogeochemical processes affecting the C, N and P dynamics. Our findings imply that land-use changes alter soil C, N and P dynamics and contents, with potential negative consequences for the sustainability of livestock production systems in the tropical regions of Mexico investigated.

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“…Favoring microbial consortia, like the ones included in some biofertilizers, could also impact the carbon cycle, creating a delicate balance between microbial metabolic activity in the plant-microbe interface and biogeochemistry. Such an approach could develop more effective and sustainable biofertilizers [10].…”

Section: Introductionmentioning

confidence: 99%

A Study of Microbial Diversity in a Biofertilizer Consortium

Hernández-Álvarez,

Peimbert,

Rodríguez-Martin

et al. 2023

Preprint

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Biofertilizers supply living microorganisms to help plants grow and maintain their health. In this study, we examine the microbiome composition of a commercial biofertilizer that has been proven to promote plant growth. Using ITS and 16S rRNA gene sequence analyses, we describe the microbial communities of the biofertilizer, with 182 fungal species and 964 bacterial genera identified. The biofertilizer contains a variety of microorganisms that had been reported to enhance nutrient uptake, phytohormone production, stress tolerance, and pathogen resistance in plants. Plant roots created a microenvironment that boosted bacterial diversity but filtered fungal communities. We propose using plant roots as bioreactors to sustain dynamic environments that promote the proliferation of microorganisms with biofertilizer potential. However, preserving the fungal-inoculated substrate is crucial to maintain fungal diversity in the root fraction. The study suggests that bacteria grow close to plant roots, while root-associated fungi may be a subset of the substrate fungi. These findings indicate that the composition of the biofertilizer may be influenced by the selection of microorganisms associated with plant roots, which could have implications for the effectiveness of the biofertilizer in promoting plant growth.

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Soil organic matter dynamics and microbial metabolism along an altitudinal gradient in Highland tropical forests

Cited by 21 publications

References 71 publications

Tree stratum alteration decreases C use efficiency and the stability of litter decomposition in a sacred fir ( Abies religiosa ) forest

Tree stratum alteration decreases C use efficiency and the stability of litter decomposition in a sacred fir ( Abies religiosa ) forest

Effects of Land Use Change from Natural Forest to Livestock on Soil C, N and P Dynamics along a Rainfall Gradient in Mexico

A Study of Microbial Diversity in a Biofertilizer Consortium

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