Ectomycorrhizal community structure and function in interior spruce forests of British Columbia under long term fertilization

Hay, Tristyn Nicole; Phillips, Lori A.; Nicholson, Bailey A.; Jones, Melanie D.

doi:10.1016/j.foreco.2015.04.023

Cited by 15 publications

(11 citation statements)

References 62 publications

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“…It has been observed that the microbial community composition tends to be more significantly affected by mineral fertilization when the application is prolonged in time (Geisseler and Scow 2014), although there has also been found no effects on ECM fungal community composition if fertilization is balanced in nutrients (Hay et al 2015). The similar fungal community composition , d), obtained from the mesh bags at the beginning of the experiment (initial material) and after 17 months of incubation in the mineral horizon of the control and fertilized plots.…”

Section: Discussionmentioning

confidence: 89%

Chemical changes in organic matter after fungal colonization in a nitrogen fertilized and unfertilized Norway spruce forest

et al. 2017

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Background and aims Decomposition and transformation of organic matter (OM) in forest soils are conducted by the concomitant action of saprotrophic and mycorrhizal fungi. Here, we examine chemical changes in OM after fungal colonization in nitrogen fertilized and unfertilized soils from a Norway spruce forest. Methods Sand-filled bags amended with composted maize leaves were placed in the forest soil and harvested after 17 months. Infrared and near edge X-ray absorption fine structure spectroscopies were used to study the chemical changes in the OM. Fungal community composition of the bags was also evaluated. Results The proportion of ectomycorrhizal fungi declined in the fertilized plots, but the overall fungal community composition was similar between N treatments. Decomposition of the OM was, independently of the N level or soil horizon, accompanied by an increase of C/N ratio of the mesh-bag content. Moreover, the proportions of carboxylic compounds in the incubated OM increased in the mineral horizon, while heterocyclic-N compounds decreased, especially in unfertilized plots with higher N demand from the trees. Conclusions Our results indicate that more oxidized organic C and less heterocyclic-N proportions in the OM remain after fungal colonization in the mineral layers, and suggest that ectomycorrhizal fungi transfer less heterocyclic-N from the mesh bags to the host trees under high N levels.

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Section: Discussionmentioning

confidence: 89%

Chemical changes in organic matter after fungal colonization in a nitrogen fertilized and unfertilized Norway spruce forest

et al. 2017

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“…; Hay et al . ), other members of these genera have been previously identified as nitrophilic fungi (Avis et al . ; Carfrae et al .…”

Section: Discussionmentioning

confidence: 96%

Host and tissue variations overshadow the response of boreal moss‐associated fungal communities to increased nitrogen load

Davey

Skogen

Heegaard³

et al. 2017

Molecular Ecology

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Human activity has more than doubled the amount of nitrogen entering the global nitrogen cycle, and the boreal forest biome is a nitrogen-limited ecosystem sensitive to nitrogen load perturbation. Although bryophyte-associated microbes contribute significantly to boreal forest ecosystem function, particularly in carbon and nitrogen cycling, little is known about their responses to anthropogenic global change. Amplicon pyrosequencing of the ITS2 region of rDNA was used to investigate how fungal communities associated with three bryophyte species responded to increased nitrogen loads in a long-term fertilization experiment in a boreal Picea abies forest in southern Norway. Overall, OTU richness, community composition and the relative abundance of specific ecological guilds were primarily influenced by host species identity and tissue type. Although not the primary factor affecting fungal communities, nitrogen addition did impact the abundance of specific guilds of fungi and the resulting overall community composition. Increased nitrogen loads decreased ectomycorrhizal abundance, with Amphinema, Cortinarius, Russula and Tylospora OTUs responding negatively to fertilization. Pathogen abundance increased with fertilization, particularly in the moss pathogen Eocronartium. Saprophytic fungi were both positively and negatively impacted by the nitrogen addition, indicating a complex community level response. The overshadowing of the effects of increased nitrogen loads by variation related to host and tissue type highlights the complexity of bryophyte-associated microbial communities and the intricate nature of their responses to anthropogenic global change.

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“…For each paper, the following information was collected: location, ecosystem types, experiment methods (field or incubation study), sampling horizons (organic horizon or mineral horizon soil), fertilization rates, fertilization duration, soil texture, concentrations of soil organic carbon (SOC), total N (TN), and other soil properties (Table S3). The related references refer to the supporting information [Ajwa et al, 1999;Hay et al, 2015;Hu et al, 2013;Jang et al, 2010;Kang and Lee, 2005;Klose et al, 1999;Prietzel, 2001;Stursova et al, 2006;Wang et al, 2016;Zhang et al, 2013].…”

Section: Data Compilationmentioning

confidence: 99%

Effects of nitrogen deposition on soil sulfur cycling

Chen

Yang

Wen

et al. 2016

Global Biogeochemical Cycles

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Increased atmospheric nitrogen (N) deposition has been found to alter processes and functions of terrestrial ecosystems including the biogeochemical cycling of N and other elements, e.g., phosphorus (P), calcium (Ca), and potassium (K). Nevertheless, how N deposition changes sulfur (S) cycling is largely unknown. Based on a meta‐analysis and a lab N addition experiment, here we show that N addition significantly suppresses the activity of soil arylsulfatase, which is a major enzyme involved in the mineralization of organic S. The evidence suggests that N‐induced decrease in soil pH is responsible for the decrease of arylsulfatase activity. Soil buffering capacity plays a critical role in mediating the extent of arylsulfatase activity response to N inputs via its regulation on soil pH. Our results suggest that N deposition may slow down S cycling by suppressing soil organic S mineralization.

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Ectomycorrhizal community structure and function in interior spruce forests of British Columbia under long term fertilization

Cited by 15 publications

References 62 publications

Chemical changes in organic matter after fungal colonization in a nitrogen fertilized and unfertilized Norway spruce forest

Chemical changes in organic matter after fungal colonization in a nitrogen fertilized and unfertilized Norway spruce forest

Host and tissue variations overshadow the response of boreal moss‐associated fungal communities to increased nitrogen load

Effects of nitrogen deposition on soil sulfur cycling

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