Community Structure of Ectomycorrhizal Fungi in a Pinus Muricata Forest: Above- and Below-ground Views PDF Download
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Author: M. Gardes
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Author: M. Gardes
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Author: Thomas Roscoe Horton
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Book Description
Author: Michael P. Amaranthus
Publisher:
ISBN:
Category : Ectomycorrhizas
Languages : en
Pages : 24
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Book Description
Author: Martina Peter
Publisher:
ISBN:
Category :
Languages : en
Pages : 127
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Book Description
Author: Lena Jonsson
Publisher:
ISBN:
Category : Ectomycorrhizal fungi
Languages : en
Pages : 136
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Author: Kabir Gabriel Peay
Publisher:
ISBN:
Category :
Languages : en
Pages : 378
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Author: Thomas R. Horton
Publisher: Springer
ISBN: 9401773955
Category : Science
Languages : en
Pages : 299
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Book Description
The last 25 years have seen significant advances in our understanding of the mycorrhizal fungi that colonize most of the world’s plants, and the mycorrhizal networks that form and extend into the soil beyond plant roots. In addition to a thorough review of recent research on mycorrhizal networks, this book provides readers with alternative perspectives. The book is organized into three sections: Network Structure, Nutrient Dynamics, and the Mutualism-Parasitism Continuum. Chapter 1 addresses the specificity of ectomycorrhizal symbionts and its role in plant communities, and provides an updated list of terms and definitions. Chapter 2 explores interactions between symbionts in mycorrhizal fungi networks, as well as interactions between fungal individuals. The second section of the book begins with the examination in Chapter 3 of extramatrical mycelium (mycelia beyond the root tips) in ectomycorrhizal fungi, focused on carbon and nitrogen. Chapter 4 reviews the influence of mycorrhizal networks on outcomes of plant competition in arbuscular mycorrhizal plant communities. Chapter 5 discusses nutrient movement between plants through networks with a focus on the magnitude, fate and importance of mycorrhiza-derived nutrients in ectomycorrhizal plants. Section 3 opens with a review of research on the role of ectomycorrhizal networks on seedling establishment in a primary successional habitat, in Chapter 6. The focus of Chapter 7 is on facilitation and antagonism in arbuscular mycorrhizal networks. Chapter 8 explores the unique networking dynamic of Alnus, which differs from most ectomycorrhizal plant hosts in forming isolated networks with little direct connections to networks of other host species in a forest. Chapter 9 argues that most experiments have not adequately tested the role of mycorrhizal networks on plant community dynamics, and suggests more tests to rule out alternative hypotheses to carbon movement between plants, especially those that include experimental manipulations of the mycorrhizal networks. Plant ecologists have accumulated a rich body of knowledge regarding nutrient acquisition by plants. The editor proposes that research indicating that mycorrhizal fungi compete for nutrients, which are then delivered to multiple hosts through mycorrhizal networks, represents an important new paradigm for plant ecologists.
Author: Jennifer Lyn Lansing
Publisher:
ISBN:
Category : Ectomycorrhizal fungi
Languages : en
Pages : 332
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Mycorrhizal fungi are found extensively in forest soils and play a crucial role in carbon and nitrogen cycling between plant and soil. However, little is known about how mycorrhizal communities differ between forest systems or what role they play in below ground carbon dynamics. This study addresses the basic ecological questions of how ECM and AM vary between gymnosperm and angiosperm host taxa in undisturbed forest ecosystems which vary in climate and soil characteristics. I use a manipulative N fertilization experiment to study the mycorrhizae between forest sites and their role in ecosystem cycling. AM and ECM percent colonized root length and colonized root length per minirhizotron frame differed between sites and between years. The extramatrical hyphae of all four major AM genera were present at all sites whereas spores, in low abundance, were mainly Glomus spp. Richness of ECM morphotypes was similar between sites at a variety of scales. Functional groups based on ECM morphological characters differed between sites and some fertilization effects were found. Site location was the most influential factor in determining mycorrhizal abundance, composition, and overall role in carbon and nitrogen cycling. At the P. edulis site, I intensively studied the abundance, diversity, composition, and spatial distribution of ECM using morphotyping and RFLP analysis. Years differed in ECM abundance and composition. ECM types differed in frequency across the landscape, abundance at any individual tree, and spatial aggregation. Each P. edulis tree was similar in ECM tip abundance, richness, and number of dominant ECM types. At all scales a few ECM types were dominant however there was temporal and tree to tree variability in which ECM were dominant. The individual tree is the most important sampling unit when assessing P. edulis ECM diversity and composition. Also at the P. edulis site, using RFLP analysis to identify ECM types and 14C to estimate age I found a differential response in the 14C signature of RFLP types to N fertilization indicating that N fertilization does not affect all ECM fungi similarly and functional differences in ECM fungi exist.
Author: Melissa Hamilton Morris
Publisher:
ISBN:
Category :
Languages : en
Pages : 256
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Author: Sydney Glassman
Publisher:
ISBN:
Category :
Languages : en
Pages : 231
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Book Description
For my dissertation I focused on two key questions central to fungal diversity: the role of dispersal in fungal community assembly, and the response of fungi to catastrophic disturbances. As we enter the Anthropocene and catastrophic disturbances are increasing in frequency, it is important to understand how fungi will respond to disturbances since they are major drivers of many ecological processes such as decomposition and forest function. To do this, I utilized large scale-sampling and ITS amplicon-based metagenomics to examine the environmental drivers of ectomycorrhizal fungal spore bank diversity across the North American continent. Two of my study plots were then burned in a catastrophic wildfire. Thus I was able to examine ectomycorrhizal fungal spore bank recovery after the fire, and I made a case for a group of fire fungi, adapted to wildfires. To examine the role of dispersal in fungal community assembly, I used a high elevation subalpine basin located in Yosemite National Park where isolated congeneric pine trees have established at varying distances from each other and the forest edge. Since ectomycorrhizal fungi are obligate symbionts of trees, isolated trees are islands from the perspective of the fungi. I used these well-replicated "islands" to test the theory of island biography in host-associated fungi. Moreover, because two distantly related pine species co-occurred in varying distances from each other and the forest edge, I could disentangle host from distance and other environmental factors to determine the drivers of community structure and beta-diversity in the ectomycorrhizal fungi associated with the trees. To do so, I determined fungal community composition with Illumina MiSeq sequencing of ITS amplicons, and applied generalized dissimilarity modeling (GDM), a non-linear form of matrix regression, to test whether total and ectomycorrhizal fungal (EMF) communities were primarily structured by distance decay, host, seasonality, or edaphic environmental filtering. I identified soil nutrient environment as a stronger predictor of EMF community composition than host identity. I found pH and organic matter to be the strongest predictors of EMF, and total fungal composition. This result fits an emerging paradigm that soil pH is a major driver of microbial community composition.
