Bacterial and fungal growth on different plant litter in Mediterranean soils: Effects of C/N ratio and soil pH

Grosso, F.; Bååth, Erland; Nicola, Flavia De

doi:10.1016/j.apsoil.2016.07.020

Cited by 98 publications

(31 citation statements)

References 35 publications

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“…It is possible that plant productivity may affect soil fungal richness indirectly through the modification of the soil C : N ratio, which was one of the strongest predictors of fungal richness (Table ). Related to productivity, soil C : N ratio represents a proxy for nutrient availability (Cleveland & Liptzin, ) that may constrain build‐up of fungal biomass and the activity of exoenzymes (Prevost‐Boure et al ., ; Drake et al ., ; Grosso et al ., ). Soil C : N ratio varied by an order of magnitude in our study, and increasing C : N ratio had a strong negative effect on the richness of fungi and all functional groups, except pathogens and ECM fungi (Tables ).…”

Section: Discussionmentioning

confidence: 97%

Soil fungal diversity in natural grasslands of the Tibetan Plateau: associations with plant diversity and productivity

et al. 2017

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Previous studies have revealed inconsistent correlations between fungal diversity and plant diversity from local to global scales, and there is a lack of information about the diversity-diversity and productivity-diversity relationships for fungi in alpine regions. Here we investigated the internal relationships between soil fungal diversity, plant diversity and productivity across 60 grassland sites on the Tibetan Plateau, using Illumina sequencing of the internal transcribed spacer 2 (ITS2) region for fungal identification. Fungal alpha and beta diversities were best explained by plant alpha and beta diversities, respectively, when accounting for environmental drivers and geographic distance. The best ordinary least squares (OLS) multiple regression models, partial least squares regression (PLSR) and variation partitioning analysis (VPA) indicated that plant richness was positively correlated with fungal richness. However, no correlation between plant richness and fungal richness was evident for fungal functional guilds when analyzed individually. Plant productivity showed a weaker relationship to fungal diversity which was intercorrelated with other factors such as plant diversity, and was thus excluded as a main driver. Our study points to a predominant effect of plant diversity, along with other factors such as carbon : nitrogen (C : N) ratio, soil phosphorus and dissolved organic carbon, on soil fungal richness.

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Section: Discussionmentioning

confidence: 97%

Soil fungal diversity in natural grasslands of the Tibetan Plateau: associations with plant diversity and productivity

et al. 2017

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“…Acidity and alkalinity in the decomposition environment are also important factors influencing litter decomposition because microbes all have different suitable ranges of pH, higher or lower pH values may significantly inhibit microbial activity (Grosso et al 2016), thus affecting the decomposition process. Hohmann and Neely found that increased acidity could inhibit the decomposition of Sparganium eurycarpum litter (Hohmann and Neely 1993), while Leuven and Wolfs found that pH had a more important impact on decomposition of Juncus bulbosus L., with the dry weight loss of total organic matter being 55 and 59% after 37 days in the control treatment with a pH value of 3.5 and 5.6, respectively (Leuven and Wolfs 1988).…”

Section: Influence Of Groundwater Level Gradients On Decomposition Prmentioning

confidence: 99%

Effect of ground water level on the release of carbon, nitrogen and phosphorus during decomposition of Carex. cinerascens Kükenth in the typical seasonal floodplain in dry season

Zhang

et al. 2019

Journal of Freshwater Ecology

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From November 2016 to April 2017, the decomposition of Carex. cinerascens K€ ukenth litter along the natural gradients of groundwater level at Poyang Lake wetland beach were simulated using litterbag technique. The depth of the underground water table of the G-L was À25 to À50 cm, while those of G-ML, G-MH and G-H ranged from À15 to À25 cm, À5 to À15 cm, and À5 to 5, respectively. Additionally, the dry weight loss rate increased gradually with increasing days, with that of G-H being highest, followed by G-MH, G-ML and G-L. The decomposition rate of the four gradients increased rapidly to day 30, then decreased slowly until stabilizing. Additionally, the decomposition rate was highest in G-H, followed by G-MH, G-ML and G-L. The Olson negative exponential model could simulate the decomposition good and predicted the time required for 50% decomposition of the G-H, G-MH, G-ML and G-L gradients was about 166, 197, 205 and 247 days, respectively, while required for 95% was about 1.97, 2.23, 2.43 and 2.92 years, respectively. The overall trend in the relative return index of carbon, nitrogen and phosphorus increased with increasing decomposition days, and the order was G-H > G-MH > G-ML > G-L. Differences in soil pH, bulk density, soil total nitrogen, soil organic matter, microbial biomass carbon and soil sand content in the decomposed environment due to groundwater had a significant impact on decomposition and nutrient release. The relative return index of carbon was significantly positively correlated with soil pH, but significantly negatively correlated with soil bulk density, soil nitrogen content, microbial biomass nitrogen and soil organic matter. The above ARTICLE HISTORY

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“…First, the change in soil nutrient availability may alter fungal community structure through nutritional resource partitioning (Hanson et al, 2008). Second, the diversity of compounds in plant litter may determine the extent of resource heterogeneity to soil-dwelling fungal decomposer communities, which resulted in corresponding changes in fungal community composition (Grosso et al, 2016). In summary, integrated fertilization practices caused significant changes in fungal community structure in soils, which is the result of complex interactions among selection factors that may favor beneficial or detrimental relationships.…”

Section: Effect Of Fertilization On Fungal Community Compositionmentioning

confidence: 99%

“…However, the underlying mechanisms of fertilization practices to influence soil fertility remain largely elusive, particularly the roles of these practices on soil fungi. Soil fungi played important roles in leaf litter decomposition, which in turn promoted the sustainability and productivity in soil ecosystems (Grosso et al, 2016). Considering the significant role that soil fungi play in soil productivity, it is critical to catalogue their diversity and composition.…”

Section: Introductionmentioning

confidence: 99%

Soil fungal communities in tea plantation after 10 years of chemical vs . integrated fertilization

Wang

Huang

Fang

et al. 2017

Chil. j. agric. res.

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Bacterial and fungal growth on different plant litter in Mediterranean soils: Effects of C/N ratio and soil pH

Cited by 98 publications

References 35 publications

Soil fungal diversity in natural grasslands of the Tibetan Plateau: associations with plant diversity and productivity

Soil fungal diversity in natural grasslands of the Tibetan Plateau: associations with plant diversity and productivity

Effect of ground water level on the release of carbon, nitrogen and phosphorus during decomposition of Carex. cinerascens Kükenth in the typical seasonal floodplain in dry season

Soil fungal communities in tea plantation after 10 years of chemical vs . integrated fertilization

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