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عنوان فارسی مقاله:
استوکیومتری منابع بواسطه از دست دادن C خاک و تحولات مواد مغذی در خاک جنگل
عنوان انگلیسی مقاله:
Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The transfer of carbon (C)from tree roots to the surrounding soil (i.e., the rhizosphere) is increasingly being recognized as a critical driver of ecosystem processes (Hogberg et al., 2001; Cheng and Kuzyakov, 2005; Finzi et al., 2015), ecosystem sensitivity to global change (Phillips et al., 2011), and biospheric feedbacks to climate (Bardgett et al., 2008; Heimann and Reichstein, 2008). Plant roots release between 5 and 20% of total photosynthate C as root exudates, mostly as soluble sugars, amino acids, or organic acids (Grayston et al., 1996). By exuding compounds of varying chemical quality, roots regulate microbial physiology and extracellular enzyme production in ways that can both accelerate or decelerate SOM decomposition and increase or decrease nutrient availability (Cheng et al., 2014). Consequently, there is a need to develop a theoretical and predictive understanding of exudate impacts on soil biogeochemistry, in order to develop improved strategies that maximize ecosystem services while minimizing environmental degradation. In forests, most studies of the biogeochemical impacts of exudates have focused on quantifying exudation rates or rhizosphere C fluxes (Phillips and Fahey, 2005; Phillips et al., 2011; Brzostek et al., 2013; Yin et al., 2013; Cheng et al., 2014). Much less is known about variation in the chemical quality of exudates (among tree species or within the same species growing indifferent environmental conditions), and how such variation can influence microbial communities and ecosystem processes. Most exudates are organic compounds (Smith, 1976; Grayston et al., 1996) that have C:N ratios greater than those of the microbial biomass (Cleveland and Liptzin, 2007). This can create strong competition between roots and microbes for N in the rhizosphere, leading to N immobilization and exacerbated nutrient limitation for plants (Jackson et al., 2008; Frank and Groffman, 2009). Moreover, tree species can differ in their exudate stoichiometry (Smith, 1976), and such differences have the potential to alter bacterial (Eilers et al., 2010), fungal (Broeckling et al., 2008) or both bacteria and fungal (de Graaff et al., 2010) communities, and consequently SOM decomposition and nutrient cycling via priming effects (Landi et al., 2006; Drake et al., 2013).
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کلمات کلیدی:
It is elemental: soil nutrient stoichiometry drives bacterial diversity ... onlinelibrary.wiley.com/doi/10.1111/1462-2920.13642/full by M Delgado‐Baquerizo - 2016 - Cited by 1 - Related articles Feb 3, 2017 - We found that bacterial diversity and composition were primarily driven by variation in soil resource stoichiometry (total C:N:P ratios), itself ... [PDF]Resource stoichiometry elucidates the structure and function of ... cedarcreek.umn.edu/biblio/fulltext/New_Phytologist_2009_Johnson.pdf by NC Johnson - 2009 - Cited by 307 - Related articles the usefulness of resource stoichiometry as a framework for .... Acquisition of soil resources is certain to be a strong selec- ...... is mediated by mycorrhizas. Publications - Phillips Lab - Indiana University Bloomington phillipslab.bio.indiana.edu/publications.html by M Shi - Cited by 5 - Related articles Native soil microbial communities buffer tree physiological parameters from drought stress ... Resource stoichiometry mediates microbial priming and nutrient ... 1. Resource stoichiometry mediates soil C loss and nutrient ... - 首页 en.ustc.findplus.cn/?h=articles&db=edselc&an=edselc.2-52... - Translate this page Title: Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils. Authors: Huajun, Y.1. Liang, R.1. Liu, Q.1. Phillips, R.P.2. Xu, Z.3. [PDF]Stoichiometric imbalances between terrestrial decomposer ... - Frontiers www.frontiersin.org/Journal/DownloadFile.ashx?pdf=1&FileId...1... by M Mooshammer - 2014 - Cited by 70 - Related articles Jan 14, 2014 - Stoichiometric imbalances between resources and soil microbial ...... may mediate reciprocal transfer of C and N between soil and litter, ... Mycorrhizal Mediation of Soil: Fertility, Structure, and Carbon Storage https://books.google.com/books?isbn=0128043830 Nancy Collins Johnson, Catherine Gehring, Jan Jansa - 2016 - Technology & Engineering Precipitation, soils NPP, and biodiversity: resurrection of Albrecht's curve. ... Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across ... Host plant quality mediates competition between mycorrhizal fungi. The Microbial Regulation of Global Biogeochemical Cycles: https://books.google.com/books?isbn=2889192970 Johannes Rousk, Per Bengtson - 2014 - Microbiology However, the relationship between the stoichiometry of resource and ... In addition, they may mediate reciprocal transfer of C and N between soil and litter, ...
