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Winter climate change affects growing‐season soil microbial biomass and activity in northern hardwood forests

Durán, Jorge ; Morse, Jennifer L ; Groffman, Peter M ; Campbell, John L ; Christenson, Lynn M ; Driscoll, Charles T ; Fahey, Timothy J ; Fisk, Melany C ; Mitchell, Myron J ; Templer, Pamela H

Global change biology, 2014-11, Vol.20 (11), p.3568-3577 [Periódico revisado por pares]

Oxford: Blackwell Science

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Título:
Winter climate change affects growing‐season soil microbial biomass and activity in northern hardwood forests
Autor: Durán, Jorge ; Morse, Jennifer L ; Groffman, Peter M ; Campbell, John L ; Christenson, Lynn M ; Driscoll, Charles T ; Fahey, Timothy J ; Fisk, Melany C ; Mitchell, Myron J ; Templer, Pamela H
Assuntos: Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Biomass ; carbon ; Climate ; Climate Change ; Climatology. Bioclimatology. Climate change ; Earth, ocean, space ; environmental factors ; Exact sciences and technology ; External geophysics ; Forest soils ; Forestry ; Forests ; frost ; Fundamental and applied biological sciences. Psychology ; General aspects ; General forest ecology ; Generalities. Production, biomass. Quality of wood and forest products. General forest ecology ; global change ; growing season ; hardwood forests ; Meteorology ; microbial biomass ; microbial respiration ; mineralization ; New Hampshire ; nitrates ; nitrification ; nitrogen ; Nitrogen - metabolism ; Seasons ; Snow ; snowpack ; Soil - chemistry ; soil frost ; Soil Microbiology ; soil temperature ; spring ; Terrestrial ecosystems ; Winter
É parte de: Global change biology, 2014-11, Vol.20 (11), p.3568-3577
Notas: http://dx.doi.org/10.1111/gcb.12624
ark:/67375/WNG-1MC8TMJK-5
Spanish Ministry of Education
Portuguese Ministry of Education and Science - No. SFRH/BDP/87966/2012
istex:9B313A4F3F83FF9CDBF4200EBE72FD01CE0FB105
US National Science Foundation - No. DEB 0949664; No. DEB 1114804
ArticleID:GCB12624
Figure S1. Significant univariate linear regressions [ordinary least-squares (OLS)] between elevation (as the only predictor) and soil temperature, volumetric water content, organic matter, microbial biomass, total inorganic nitrogen, and potential mineralization, nitrification and microbial respiration rates, in spring (upper row) and summer (lower row) of 2011. Variable abbreviations are as in Table .Figure S2. Significant univariate linear regressions [ordinary least-squares (OLS)] between elevation (as the only predictor) and soil temperature, volumetric water content, soil organic matter, and microbial respiration rates, in spring (upper row) and summer (lower row) of 2012. Variable abbreviations are as in Table .Figure S3. Univariate linear regression [ordinary least-squares (OLS)] between 'snow' (as the only predictor) and 'Swtv'. in the winters of 2010-2011 and 2011-2012. Variable abbreviations are as in Table .Figure S4. Daily min/max (area) and mean (line) soil temperature in the OiOe horizon in high and low elevation plots, from December 1st to May 1st, in the Winters 2010-2011 and 2011-2012.Table S1. Univariate linear regressions [ordinary least-squares (OLS)] between potential mineralization rates (PM), potential nitrification rates (PN), and microbial respiration (PMR), and their expected predictors in spring and summer of 2011 and 2012. Abbreviations are as in Table .
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Descrição: Understanding the responses of terrestrial ecosystems to global change remains a major challenge of ecological research. We exploited a natural elevation gradient in a northern hardwood forest to determine how reductions in snow accumulation, expected with climate change, directly affect dynamics of soil winter frost, and indirectly soil microbial biomass and activity during the growing season. Soils from lower elevation plots, which accumulated less snow and experienced more soil temperature variability during the winter (and likely more freeze/thaw events), had less extractable inorganic nitrogen (N), lower rates of microbial N production via potential net N mineralization and nitrification, and higher potential microbial respiration during the growing season. Potential nitrate production rates during the growing season were particularly sensitive to changes in winter snow pack accumulation and winter soil temperature variability, especially in spring. Effects of elevation and winter conditions on N transformation rates differed from those on potential microbial respiration, suggesting that N‐related processes might respond differently to winter climate change in northern hardwood forests than C‐related processes.
Editor: Oxford: Blackwell Science
Idioma: Inglês

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Winter climate change affects growing‐season soil microbial biomass and activity in northern hardwood forests

Durán, Jorge ; Morse, Jennifer L ; Groffman, Peter M ; Campbell, John L ; Christenson, Lynn M ; Driscoll, Charles T ; Fahey, Timothy J ; Fisk, Melany C ; Mitchell, Myron J ; Templer, Pamela H

Oxford: Blackwell Science

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