A meta‐analysis of mycorrhizal responses to nitrogen, phosphorus, and atmospheric CO2 in field studies
Reads0
Chats0
TLDR
It is suggested that global standing stocks of mycorrhizal fungi may increase substantially under elevated CO2 but decline moderately under P additions, and effects of N deposition may be difficult to predict for individual ecosystems, with a slightly negative influence overall.Abstract:
Summary • Numerous field studies have measured mycorrhizal dynamics under additions of nitrogen (N), phosphorus (P), or atmospheric CO 2 to test the hypothesis that plants should invest in mycorrhizal fungi when soil nutrients are limiting. • Here meta-analyses were used to integrate nutrient responses across independent field-based studies. Responses were compared between ecto- and arbuscular mycorrhizal fungi, and among fertilizer types, methods of measurement, biomes, and lead investigators. Relationships between degree of response and study length, fertilization rates, total amounts of nutrients applied, and numbers of replicates were also tested. • Across studies, mycorrhizal abundance decreased 15% under N fertilization and 32% under P fertilization. Elevated CO 2 elicited a 47% increase. Nitrogen effects varied significantly among studies, and P effects varied significantly among lead investigators. Most other factors did not affect mycorrhizal responses. • These results support the plant investment hypothesis, and suggest that global standing stocks of mycorrhizal fungi may increase substantially under elevated CO 2 but decline moderately under P additions. Effects of N deposition may be difficult to predict for individual ecosystems, with a slightly negative influence overall.read more
Citations
More filters
Journal ArticleDOI
The influence of soil properties on the structure of bacterial and fungal communities across land-use types
TL;DR: Soil pH was the best predictor of bacterial community composition across this landscape while fungal community composition was most closely associated with changes in soil nutrient status, suggesting specific changes in edaphic properties, not necessarily land-use type itself, may best predict shifts in microbialcommunity composition across a given landscape.
Journal ArticleDOI
Reduction of forest soil respiration in response to nitrogen deposition
Ivan A. Janssens,Wouter Dieleman,Sebastiaan Luyssaert,Jens-Arne Subke,Markus Reichstein,Reinhart Ceulemans,Philippe Ciais,A. J. Dolman,John Grace,Giorgio Matteucci,Dario Papale,Shilong Piao,Ernst Detlef Schulze,Jianwu Tang,Beverly E. Law +14 more
TL;DR: A meta-analysis suggests that nitrogen deposition impedes organic matter decomposition, and thus stimulates carbon sequestration, in temperate forest soils where nitrogen is not limiting microbial growth as mentioned in this paper, and the concomitant reduction in soil carbon emissions is substantial, and equivalent in magnitude to the amount of carbon taken up by trees owing to nitrogen fertilization.
Journal ArticleDOI
Nitrogen additions and microbial biomass: a meta-analysis of ecosystem studies
TL;DR: It is suggested that N enrichment could reduce microbial biomass in many ecosystems, with corresponding declines in soil CO2 emissions.
Journal ArticleDOI
Phenol oxidase, peroxidase and organic matter dynamics of soil
TL;DR: In this article, a multiple regression model was used to investigate the relationship between pH and phenol oxidase and peroxidase activity in soil organic matter, and the results showed that high in situ oxidative activities limit organic matter accumulation and low in situ oxidase activity promotes organic matter storage.
Journal ArticleDOI
A meta-analysis of context-dependency in plant response to inoculation with mycorrhizal fungi
Jason D. Hoeksema,V. Bala Chaudhary,Catherine A. Gehring,Nancy Collins Johnson,Justine Karst,Roger T. Koide,Anne Pringle,Catherine A. Zabinski,James D. Bever,John C. Moore,Gail W. T. Wilson,John N. Klironomos,James Umbanhowar +12 more
TL;DR: Univariate analyses supported the hypothesis that plant response is most positive when plants are P-limited rather than N-limited when the soil community was more complex, and emphasize that mycorrhizal function depends on both abiotic and biotic context.
References
More filters
Journal ArticleDOI
The meta-analysis of response ratios in experimental ecology
TL;DR: The approximate sampling distribution of the log response ratio is given, why it is a particularly useful metric for many applications in ecology, and how to use it in meta-analysis are discussed.
Book
Design and Analysis of Ecological Experiments
TL;DR: This paper presents a meta-analysis of the results of independent Experiments combining the Results of Independent Experiments and ANCOVA to derive nonparametric and Randomization approaches to ANOVA.
Journal ArticleDOI
Beyond Global Warming: Ecology and Global Change
TL;DR: There are three major causes of global environmental change: increasing carbon dioxide in the atmosphere, alterations in the biogeochemistry of the global nitrogen cycle, and ongoing land use/land cover change as mentioned in this paper.
Journal ArticleDOI
The Response of Natural Ecosystems to the Rising Global CO2 Levels
TL;DR: Because CO2 is a greenhouse gas, its increase in the atmosphere may influence the earth's energy budget and influence world ecosystems by direct effects on plant growth and development.