Search results for: Nancy B. Dise

Items from 1 to 20 out of 28 results

article

Atmospheric nitrogen deposition is related to plant biodiversity loss at multiple spatial scales

Fons Plas, Yann Hautier, Tobias Ceulemans, Didier Alard, more

Global Change Biology > 30 > 8 > n/a - n/a

Due to various human activities, including intensive agriculture, traffic, and the burning of fossil fuels, in many parts of the world, current levels of reactive nitrogen emissions strongly exceed pre‐industrial levels. Previous studies have shown that the atmospheric deposition of these excess nitrogen compounds onto semi‐natural terrestrial environments has negative consequences for plant diversity...

article

Plant community responses to experimental climate manipulation in a Welsh ombrotrophic peatland and their palaeoenvironmental context

Luke O. Andrews, James G. Rowson, Simon J. M. Caporn, Nancy B. Dise, more

Global Change Biology > 28 > 4 > 1596 - 1617

We test whether vegetation community composition from a 10‐year climate manipulation experiment on a Welsh peat bog resembles vegetation communities during periods of climate change inferred from a peat core. Experimentally warmed and combined warmed and droughted treatments drove significant increases in ericaceous shrubs but Sphagnum was unaffected. Similarly, Calluna vulgaris seeds increase during...

article

Long-term nitrogen deposition increases heathland carbon sequestration

Chris D. Field, Chris D. Evans, Nancy B. Dise, Jane R. Hall, more

Science of The Total Environment > 2017 > 592 > C > 426-435

The large increases in reactive nitrogen (N) deposition in developed countries since the Industrial Revolution have had a marked impact on ecosystem functioning, including declining species richness, shifts in species composition, and increased N leaching. A potential mitigation of these harmful effects is the action of N as a fertiliser, which, through increasing primary productivity (and subsequently,...

article

Evidence for differential effects of reduced and oxidised nitrogen deposition on vegetation independent of nitrogen load

Leon J.L. van den Berg, Laurence Jones, Lucy J. Sheppard, Simon M. Smart, more

Environmental Pollution > 2016 > 208 > Part B > 890-897

Nitrogen (N) deposition impacts natural and semi-natural ecosystems globally. The responses of vegetation to N deposition may, however, differ strongly between habitats and may be mediated by the form of N. Although much attention has been focused on the impact of total N deposition, the effects of reduced and oxidised N, independent of the total N deposition, have received less attention. In this...

article

Soil phosphorus constrains biodiversity across European grasslands

Tobias Ceulemans, Carly J. Stevens, Luc Duchateau, Hans Jacquemyn, more

Global Change Biology > 20 > 12 > 3814 - 3822

Nutrient pollution presents a serious threat to biodiversity conservation. In terrestrial ecosystems, the deleterious effects of nitrogen pollution are increasingly understood and several mitigating environmental policies have been developed. Compared to nitrogen, the effects of increased phosphorus have received far less attention, although some studies have indicated that phosphorus pollution may...

article

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

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

Ecological Indicators > 2014 > 45 > Complete > 227-234

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...

article

A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands

Merritt R. Turetsky, Agnieszka Kotowska, Jill Bubier, Nancy B. Dise, more

Global Change Biology > 20 > 7 > 2183 - 2197

Wetlands are the largest natural source of atmospheric methane. Here, we assess controls on methane flux using a database of approximately 19 000 instantaneous measurements from 71 wetland sites located across subtropical, temperate, and northern high latitude regions. Our analyses confirm general controls on wetland methane emissions from soil temperature, water table, and vegetation, but also show...

article

The Role of Nitrogen Deposition in Widespread Plant Community Change Across Semi-natural Habitats

Chris D. Field, Nancy B. Dise, Richard J. Payne, Andrea J. Britton, more

Ecosystems > 2014 > 17 > 5 > 864-877

Experimental studies have shown that deposition of reactive nitrogen is an important driver of plant community change, however, most of these experiments are of short duration with unrealistic treatments, and conducted in regions with elevated ambient deposition. Studies of spatial gradients of pollution can complement experimental data and indicate whether the potential impacts demonstrated by experiments...

article

Heather Moorland Vegetation and Air Pollution: A Comparison and Synthesis of Three National Gradient Studies

Richard J. Payne, Simon J. M. Caporn, Christopher D. Field, Jacky A. Carroll, more

Water, Air, & Soil Pollution > 2014 > 225 > 7 > 1-13

Large-scale spatial gradient studies are increasingly used to understand the impacts of air pollution and devise appropriate conservation and policy responses, but how consistent are the conclusions we draw from these surveys? Here, we address this question by comparing three independent gradient studies from the same habitat, UK heather moorlands. We harmonise and re-analyse vegetation data from...

article

Inferring nitrogen deposition from plant community composition

Richard J. Payne, Simon J.M. Caporn, Carly J. Stevens, Jacky A. Carroll, more

Ecological Indicators > 2013 > 26 > Complete > 1-4

Chronically elevated reactive nitrogen deposition has a severe impact on many ecosystems, and there is widespread interest in the possibility of using plant community composition to estimate the level of nitrogen deposition and consequent impacts. Existing approaches use a variety of simple measures including functional type ratios, Ellenberg numbers, and diversity indices. We propose an alternative...

article

Ammonia exposure promotes algal biomass in an ombrotrophic peatland

Richard J. Payne, Vincent E.J. Jassey, Ian D. Leith, Lucy J. Sheppard, more

Soil Biology and Biochemistry > 2013 > 57 > Complete > 936-938

Nitrogen pollution affects many peatlands with consequences for their biodiversity and ecosystem function. Microorganisms control nutrient cycling and constitute most of the biodiversity of peatlands but their response to nitrogen is poorly characterised and likely to depend on the form of deposition. Using a unique field experiment we show that ammonia exposure at realistic point source levels is...

article

Differential Effects of Oxidised and Reduced Nitrogen on Vegetation and Soil Chemistry of Species-Rich Acidic Grasslands

Edu Dorland, Carly J. Stevens, Cassandre Gaudnik, Emmanuel Corcket, more

Water, Air, & Soil Pollution > 2013 > 224 > 9 > 1-13

Emissions and deposition of ammonia and nitrogen oxides have strongly increased since the 1950s. This has led to significant changes in the nitrogen (N) cycle, vegetation composition and plant diversity in many ecosystems of high conservation value in Europe. As a consequence of different regional pollution levels and of the increased importance of reduced N in the near future, determining the effect...

article

Impacts of atmospheric nitrogen deposition: responses of multiple plant and soil parameters across contrasting ecosystems in long‐term field experiments

Gareth K. Phoenix, Bridget A. Emmett, Andrea J. Britton, Simon J. M. Caporn, more

Global Change Biology > 18 > 4 > 1197 - 1215

Atmospheric nitrogen (N) deposition is a global and increasing threat to biodiversity and ecosystem function. Much of our current understanding of N deposition impacts comes from field manipulation studies, although interpretation may need caution where simulations of N deposition (in terms of dose, application rate and N form) have limited realism. Here, we review responses to simulated N deposition...

article

Special issue on nitrogen deposition, critical loads, and biodiversity

Christine L. Goodale, Nancy B. Dise, Mark A. Sutton

Environmental Pollution > 2011 > 159 > 10 > 2211-2213

article

The impact of nitrogen deposition on acid grasslands in the Atlantic region of Europe

Carly J. Stevens, Cecilia Duprè, Edu Dorland, Cassandre Gaudnik, more

Environmental Pollution > 2011 > 159 > 10 > 2243-2250

A survey of 153 acid grasslands from the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is changing plant species composition and soil and plant-tissue chemistry. Across the deposition gradient (2–44 kg N ha ⁻¹ yr ⁻¹ ) grass richness as a proportion of total species richness increased whereas forb richness decreased. Soil C:N ratio increased, but...

article

Impacts of atmospheric pollution on the plant communities of British acid grasslands

Richard J. Payne, Carly J. Stevens, Nancy B. Dise, David J. Gowing, more

Environmental Pollution > 2011 > 159 > 10 > 2602-2608

Air pollutants are recognised as important agents of ecosystem change but few studies consider the effects of multiple pollutants and their interactions. Here we use ordination, constrained cluster analysis and indicator value analyses to identify potential environmental controls on species composition, ecological groupings and indicator species in a gradient study of UK acid grasslands. The community...

article

Peatlands in a changing world

Nancy B. Dise, Gareth K. Phoenix

New Phytologist > 191 > 2 > 309 - 311

article

Nitrogen deposition threatens species richness of grasslands across Europe

Carly J. Stevens, Cecilia Duprè, Edu Dorland, Cassandre Gaudnik, more

Environmental Pollution > 2010 > 158 > 9 > 2940-2945

Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant species richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha ⁻¹ yr ⁻¹ ) species richness showed a curvilinear response, with greatest reductions in species richness when deposition increased from low levels...

article

Woody stem methane emission in mature wetland alder trees

Vincent Gauci, David J.G. Gowing, Edward R.C. Hornibrook, Joanna M. Davis, more

Atmospheric Environment > 2010 > 44 > 17 > 2157-2160

Methane (CH ₄ ) is an important greenhouse gas that is predominantly emitted to the atmosphere from anoxic wetland ecosystems. Understanding the sources and emissions of CH ₄ is crucially important for climate change predictions; however, there are significant discrepancies between CH ₄ source estimates derived via so-called bottom-up and top-down methods. Here we report CH...

article

Changes in species richness and composition in European acidic grasslands over the past 70 years: the contribution of cumulative atmospheric nitrogen deposition

CECILIA DUPRÈ, CARLY J. STEVENS, TRAUTE RANKE, ALBERT BLEEKER, more

Global Change Biology > 16 > 1 > 344 - 357

Our study investigates the negative impact of nitrogen (N) deposition on species richness in acidic grasslands, based on a temporal comparison of vegetation data spanning a period of almost 70 years. We compiled a large data base of plots assigned to the Violion caninae grassland type, composed of managed, but unfertilized semi‐natural grasslands on nutrient‐poor, acidic soils. In total 1114 plots,...

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INFONA - science communication portal

Search results for: Nancy B. Dise

Atmospheric nitrogen deposition is related to plant biodiversity loss at multiple spatial scales

Plant community responses to experimental climate manipulation in a Welsh ombrotrophic peatland and their palaeoenvironmental context

Long-term nitrogen deposition increases heathland carbon sequestration

Evidence for differential effects of reduced and oxidised nitrogen deposition on vegetation independent of nitrogen load

Soil phosphorus constrains biodiversity across European grasslands

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

A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands

The Role of Nitrogen Deposition in Widespread Plant Community Change Across Semi-natural Habitats

Heather Moorland Vegetation and Air Pollution: A Comparison and Synthesis of Three National Gradient Studies

Inferring nitrogen deposition from plant community composition

Ammonia exposure promotes algal biomass in an ombrotrophic peatland

Differential Effects of Oxidised and Reduced Nitrogen on Vegetation and Soil Chemistry of Species-Rich Acidic Grasslands

Impacts of atmospheric nitrogen deposition: responses of multiple plant and soil parameters across contrasting ecosystems in long‐term field experiments

Special issue on nitrogen deposition, critical loads, and biodiversity

The impact of nitrogen deposition on acid grasslands in the Atlantic region of Europe

Impacts of atmospheric pollution on the plant communities of British acid grasslands

Peatlands in a changing world

Nitrogen deposition threatens species richness of grasslands across Europe

Woody stem methane emission in mature wetland alder trees

Changes in species richness and composition in European acidic grasslands over the past 70 years: the contribution of cumulative atmospheric nitrogen deposition

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