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dc.contributor | Facultad de Ciencias Biologicas y Ambientales | es_ES |
dc.contributor.author | Calvo Fernández, Javier | |
dc.contributor.author | Taboada Palomares, Ángela | |
dc.contributor.author | Fichtner, Andreas | |
dc.contributor.author | Härdtle, Werner | |
dc.contributor.author | Calvo Galván, María Leonor | |
dc.contributor.author | Marcos Porras, Elena María | |
dc.contributor.other | Ecologia | es_ES |
dc.date | 2017 | |
dc.date.accessioned | 2018-03-03T11:45:25Z | |
dc.date.available | 2018-03-03T11:45:25Z | |
dc.date.issued | 2017-03-03 | |
dc.identifier.citation | Science of the total environment, 2017, vol. 613-614 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10612/7422 | |
dc.description | P. 149-159 | es_ES |
dc.description.abstract | Ecosystems adapted to low nitrogen (N) conditions such as Calluna-heathlands are especially sensitive to enhanced atmospheric N deposition that affects many aspects of ecosystem functioning like nutrient cycling, soil properties and plant-microbial-enzyme relationships. We investigated the effects of five levels of experimentally- simulated N deposition rates (i.e., N fertilization treatments: 0, 10, 20 and 50 kg N ha− 1 yr− 1 for 3 years, and 56 kg N ha− 1 yr− 1 for 10 years) on: plant, litter, microbial biomass and soil nutrient contents, soil extracellular enzymatic activities, and plant root ericoid mycorrhizal colonization. The study was conducted in marginal montane Calluna-heathlands at different developmental stages resulting from management (young/building-phase and mature-phase). Our findings revealed that many soil properties did not show a statistically significant response to the experimental addition of N, including: total N, organic carbon (C), C:N ratio, extractable N-NO3 −, available phosphorus (P), urease and β-glucosidase enzyme activities, and microbial biomass C and N. Our results also evidenced a considerable positive impact of chronic (10-year) high-N loading on soil extractable N-NH4 +, acid phosphatase enzyme activity, Calluna root mycorrhizal colonization by ericoid fungi, Calluna shoot N and P contents, and litter N content and N:P ratio. The age of heathland vegetation influenced the effects of N addition on ericoid mycorrhizal colonization, resulting in higher colonized roots in young heathlands at the control, low and medium N-input rates; and in mature ones at the high and chronically high N rates. Also, young heathlands exhibited greater soil extractable N-NO3 −, available P, microbial biomass N, Calluna shoot N and P contents, and litter N content, compared to mature ones. Our results highlighted that accounting for the N-input load and duration, as well as the developmental stage of the vegetation, is important for assessing the effects of added N, particularly at the heathlands' southern distribution limit. | es_ES |
dc.language | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.subject | Ecología. Medio ambiente | es_ES |
dc.subject.other | Air pollution | es_ES |
dc.subject.other | Calluna vulgaris heathland | es_ES |
dc.subject.other | Plant-litter-soil nutrient relationship | es_ES |
dc.subject.other | Extracellular enzymatic activity | es_ES |
dc.subject.other | Soil microbial biomass | es_ES |
dc.subject.other | Ericoid mycorrhizal colonization | es_ES |
dc.title | Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.description.peerreviewed | SI | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
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