Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems

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Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems. / Calvo-Fernández, Javier; Taboada, Angela; Fichtner, Andreas et al.
in: The Science of The Total Environment, Jahrgang 613-614, 01.02.2018, S. 149-159.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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Calvo-Fernández J, Taboada A, Fichtner A, Härdtle W, Calvo L, Marcos E. Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems. The Science of The Total Environment. 2018 Feb 1;613-614:149-159. Epub 2017 Sep 11. doi: 10.1016/j.scitotenv.2017.08.307

Bibtex

@article{6c19a8d8839247ee884add8b5a57fd49,
title = "Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems",
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-NO 3 −, 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-NH 4 +, 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-NO 3 −, 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. ",
keywords = "Ecosystems Research, Air pollution, Calluna vulgaris heathland, Plant-litter-soil nutrient relationship, Extracellular enzymatic activity, Soil microbial biomass, Ericoid mycorrhizal colonization, Air Pollution, Calluna vulgaris heathland, Ericoid mycorrhizal colonization, Extracellular enzymatic activity, Plant-litter-soil nutrient relationship, Soil microbial biomass",
author = "Javier Calvo-Fern{\'a}ndez and Angela Taboada and Andreas Fichtner and Werner H{\"a}rdtle and Leonor Calvo and Elena Marcos",
year = "2018",
month = feb,
day = "1",
doi = "10.1016/j.scitotenv.2017.08.307",
language = "English",
volume = "613-614",
pages = "149--159",
journal = "The Science of The Total Environment",
issn = "0048-9697",
publisher = "Elsevier B.V.",

}

RIS

TY - JOUR

T1 - Time- and age-related effects of experimentally simulated nitrogen deposition on the functioning of montane heathland ecosystems

AU - Calvo-Fernández, Javier

AU - Taboada, Angela

AU - Fichtner, Andreas

AU - Härdtle, Werner

AU - Calvo, Leonor

AU - Marcos, Elena

PY - 2018/2/1

Y1 - 2018/2/1

N2 - 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-NO 3 −, 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-NH 4 +, 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-NO 3 −, 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.

AB - 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-NO 3 −, 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-NH 4 +, 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-NO 3 −, 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.

KW - Ecosystems Research

KW - Air pollution

KW - Calluna vulgaris heathland

KW - Plant-litter-soil nutrient relationship

KW - Extracellular enzymatic activity

KW - Soil microbial biomass

KW - Ericoid mycorrhizal colonization

KW - Air Pollution

KW - Calluna vulgaris heathland

KW - Ericoid mycorrhizal colonization

KW - Extracellular enzymatic activity

KW - Plant-litter-soil nutrient relationship

KW - Soil microbial biomass

UR - http://www.scopus.com/inward/record.url?scp=85029086352&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2017.08.307

DO - 10.1016/j.scitotenv.2017.08.307

M3 - Journal articles

C2 - 28910717

VL - 613-614

SP - 149

EP - 159

JO - The Science of The Total Environment

JF - The Science of The Total Environment

SN - 0048-9697

ER -

DOI