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Open AccessJournal ArticleDOI

Partitioning of soil phosphorus among arbuscular and ectomycorrhizal trees in tropical and subtropical forests.

TLDR
The results support the hypothesis that ECM and AM plants partition soil P sources, which may play an ecologically important role in promoting species coexistence in tropical and subtropical forests.
Abstract
Partitioning of soil phosphorus (P) pools has been proposed as a key mechanism maintaining plant diversity, but experimental support is lacking. Here, we provided different chemical forms of P to 15 tree species with contrasting root symbiotic relationships to investigate plant P acquisition in both tropical and subtropical forests. Both ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) trees responded positively to addition of inorganic P, but strikingly, ECM trees acquired more P from a complex organic form (phytic acid). Most ECM tree species and all AM tree species also showed some capacity to take up simple organic P (monophosphate). Mycorrhizal colonisation was negatively correlated with soil extractable P concentration, suggesting that mycorrhizal fungi may regulate organic P acquisition among tree species. Our results support the hypothesis that ECM and AM plants partition soil P sources, which may play an ecologically important role in promoting species coexistence in tropical and subtropical forests.

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Journal ArticleDOI

How mycorrhizal associations drive plant population and community biology.

TL;DR: It is concluded that mycorrhizal associations per se and fungal diversity and mycor rhizal types directly or indirectly affect plant dispersal and competition that shape plant populations and communities, and regulate plant coexistence and diversity at a local scale.
Journal ArticleDOI

Mycorrhizal types differ in ecophysiology and alter plant nutrition and soil processes

TL;DR: It is demonstrated that guilds of mycorrhizal fungi display substantial differences in genome‐encoded capacity for mineral nutrition, particularly acquisition of nitrogen and phosphorus from organic material, which alters the trade‐off between allocation to roots or mycelium, ecophysiological traits such as root exudation, weathering, enzyme production, plant protection, and community assembly.
Journal ArticleDOI

Soil fungal networks maintain local dominance of ectomycorrhizal trees.

TL;DR: It is shown that tree seedlings that interact via root-associated fungal hyphae with soils beneath neighbouring adult trees grow faster and have greater survival than seedling that are isolated from external fungal mycelia, and neighbourhood interactions mediated by beneficial and pathogenic soil fungi regulate plant demography and community structure in hyperdiverse forests.
References
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Journal ArticleDOI

Fitting Linear Mixed-Effects Models Using lme4

TL;DR: In this article, a model is described in an lmer call by a formula, in this case including both fixed-and random-effects terms, and the formula and data together determine a numerical representation of the model from which the profiled deviance or the profeatured REML criterion can be evaluated as a function of some of model parameters.
Book

Resource competition and community structure

David Tilman
TL;DR: This book builds a mechanistic, resource-based explanation of the structure and functioning of ecological communities and explores such problems as the evolution of "super species," the differences between plant and animal community diversity patterns, and the cause of plant succession.
Journal ArticleDOI

An evaluation of techniques for measuring vesicular arbuscular mycorrhizal infection in roots

TL;DR: The standard error of four methods of assessment based on observations of stained root samples either randomly arranged in a petri dish or mounted on microscope slides are calculated.
BookDOI

Soil Sampling and Methods of Analysis

TL;DR: In this paper, the authors present a set of methods for soil sampling and analysis, such as: N.H.Hendershot, H.M.Hettiarachchi, C.C.De Freitas Arbuscular Mycorrhiza, Y.K.Soon and W.J.
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