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Campo DC | Valor | Idioma |
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dc.contributor.author | Souza, Rômulo C. | - |
dc.contributor.author | Solly, Emily F. | - |
dc.contributor.author | Dawes, Melissa Autumn | - |
dc.contributor.author | Graf, Frank | - |
dc.contributor.author | Hagedorn, Frank | - |
dc.contributor.author | Egli, Simon | - |
dc.contributor.author | Clement, Charles Roland | - |
dc.contributor.author | Nagy, László | - |
dc.contributor.author | Rixen, Christian | - |
dc.contributor.author | Peter, Martina | - |
dc.date.accessioned | 2020-06-15T21:38:48Z | - |
dc.date.available | 2020-06-15T21:38:48Z | - |
dc.date.issued | 2017 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/17093 | - |
dc.description.abstract | Background and aims: Climate warming and elevated CO2 can modify nutrient cycling mediated by enzymes in soils, especially in cold-limited ecosystems with a low availability of nutrients and a high temperature sensitivity of decomposition and mineralization. Methods: We estimated responses of soil extracellular enzyme activities (EEAs) to 6 years of soil warming and 9 years of CO2 enrichment at an Alpine treeline site. EEAs were measured in the litter (L), fermentation (F) and humified (H) horizons under Larix decidua and Pinus uncinata trees. Results: Soil warming indirectly affected EEAs through altered soil moisture, fine root biomass, and C:N ratio of the organic horizons. Warming increased β-glucosidase and β-xylosidase activities in the F horizon but led to reduced laccase activity in the L horizon, probably caused by drying of the litter horizon associated with the treatment. In the H horizon, previous CO2 enrichment altered the activity of leucine amino peptidase, N-acetylglucosaminidase, and phosphatase. No interactive effects between warming and CO2 enrichment were detected. Warming affected the temperature sensitivity of β-xylosidase but not of the other enzymes. Conclusions: Altered EEAs after six years of soil warming indicate a sustained stimulation of carbon, nitrogen and nutrient cycling under climatic warming at the alpine treeline. © 2017, Springer International Publishing Switzerland. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 416, Número 1-2, Pags. 527-537 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Alpine Environment | en |
dc.subject | Carbon Dioxide | en |
dc.subject | Climate Change | en |
dc.subject | Coniferous Tree | en |
dc.subject | Enzyme Activity | en |
dc.subject | Fermentation | en |
dc.subject | Fine Root | en |
dc.subject | Global Change | en |
dc.subject | High Temperature | en |
dc.subject | Nutrient Cycling | en |
dc.subject | Treeline | en |
dc.subject | Warming | en |
dc.subject | Larix Decidua | en |
dc.subject | Pinus Uncinata | en |
dc.title | Responses of soil extracellular enzyme activities to experimental warming and CO2 enrichment at the alpine treeline | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1007/s11104-017-3235-8 | - |
dc.publisher.journal | Plant and Soil | pt_BR |
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