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Impacts and indicators of nitrogen deposition in moorlands: Results from a national pollution gradient study

Caporn, Simon J.M. ; Carroll, Jacky A. ; Dise, Nancy B. ; Payne, Richard J.

Ecological indicators, 2014-10, Vol.45, p.227-234 [Periódico revisado por pares]

Amsterdam: Elsevier Ltd

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Título:
Impacts and indicators of nitrogen deposition in moorlands: Results from a national pollution gradient study
Autor: Caporn, Simon J.M. ; Carroll, Jacky A. ; Dise, Nancy B. ; Payne, Richard J.
Assuntos: Ammonium ; Animal and plant ecology ; Animal, plant and microbial ecology ; Applied ecology ; Bioindication ; Biological and medical sciences ; Biomonitoring ; Bryophytes ; Campylopus ; Conservation, protection and management of environment and wildlife ; Correlation ; Deposition ; Ecology ; Ecotoxicology, biological effects of pollution ; Fundamental and applied biological sciences. Psychology ; General aspects ; Heathland ; Hylocomium splendens ; Litter ; Moorland ; Nitrogen deposition ; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking ; Plants (organisms) ; Pleurozium schreberi ; Pollution abatement ; Synecology
É parte de: Ecological indicators, 2014-10, Vol.45, p.227-234
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: •Along a national deposition gradient elevated N deposition is associated with N accumulation in plant tissues and litter.•Nitrogen deposition is associated with characteristic changes in moorland vegetation and reduction in plant species richness.•Litter phenol oxidase activity is generally lower in high N deposition moorlands, with possible consequences for carbon cycling.•Potential bioindication approaches could combine determinations of plant species richness and litter N content. Damage to terrestrial ecosystems from long-term atmospheric nitrogen pollution is a key conservation challenge in many industrialized countries. An important research and management priority is the identification of bioindicators to allow pollution exposure and ecological impacts to be determined at an individual site. We evaluate the impacts of nitrogen (N) deposition and identify methods with bioindication potential across a national-scale pollutant deposition gradient for British heather moorlands. Nitrogen deposition is associated with distinct changes in plant community structure, including reduced bryophyte and vascular plant species richness, and changes in the frequency of many species. Notable results include positive correlation with nitrogen for the invasive bryophyte Campylopus introflexus and negative correlation for the pollution-sensitive Hylocomium splendens and Pleurozium schreberi. Higher nitrogen deposition is associated with increased plant foliar N in a dwarf shrub and a bryophyte, increased extractable litter N, and reduced activity of the enzyme phenol oxidase. Although gradient study results cannot prove causation it is clear that Nitrogen deposition exerts a widespread impact on the ecology and biogeochemistry of heather moorlands. Bioindicators can be used to evaluate exposure and impacts, a promising approach could combine plant species richness and litter nitrogen analyses.
Editor: Amsterdam: Elsevier Ltd
Idioma: Inglês

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Impacts and indicators of nitrogen deposition in moorlands: Results from a national pollution gradient study

Caporn, Simon J.M. ; Carroll, Jacky A. ; Dise, Nancy B. ; Payne, Richard J.

Amsterdam: Elsevier Ltd

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