WorldCat Identities

Harmens, Harry

Overview
Works: 17 works in 18 publications in 2 languages and 41 library holdings
Roles: Author, Editor
Classifications: QK753.H4, 588.2
Publication Timeline
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Most widely held works by Harry Harmens
Spatial and temporal trends in heavy metal accumulation in mosses in Europe (1990-2005) by Harry Harmens( Book )

1 edition published in 2008 in English and held by 7 WorldCat member libraries worldwide

Ozone pollution : a hidden threat to food security : report( Book )

1 edition published in 2011 in English and held by 5 WorldCat member libraries worldwide

Air pollution : Deposition to and impacts on vegetation in (South-) East Europe, Caucasus, Central Asia and South East Asia( Book )

2 editions published in 2014 in English and held by 4 WorldCat member libraries worldwide

Country-specific correlations across Europe between modelled atmospheric cadmium and lead deposition and concentrations in mosses( )

1 edition published in 2012 in English and held by 2 WorldCat member libraries worldwide

Previous analyses at the European scale have shown that cadmium and lead concentrations in mosses are primarily determined by the total deposition of these metals. Further analyses in the current study show that Spearman rank correlations between the concentration in mosses and the deposition modelled by the European Monitoring and Evaluation Programme (EMEP) are country and metal-specific. Significant positive correlations were found for about two thirds or more of the participating countries in 1990, 1995, 2000 and 2005 (except for Cd in 1990). Correlations were often not significant and sometimesnegative in countries where mosses were only sampled in a relatively small number of EMEP grids. Correlations frequently improved when only data for EMEP grids with at least three moss sampling sites per grid were included.It was concluded that spatial patterns and temporal trends agree reasonably well between lead and cadmium concentrations in mosses and modelledatmospheric deposition
Mosses as biomonitors of atmospheric heavy metal deposition : statial patterns and temporal trends in Europe( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

Heavy metal and nitrogen concentrations in mosses are declining across Europe whilst some "hotspots" remain in 2010( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

In recent decades, naturally growing mosses have been used successfully as biomonitors of atmospheric deposition of heavy metals and nitrogen. Since 1990, the European moss survey has been repeated at fi ve-yearly intervals. In 2010, the lowest concentrations of metals and nitrogen in mosses were generally found in northern Europe, whereas the highest concentrations were observed in (south-)eastern Europe for metals and the central belt for nitrogen. Averaged across Europe, since 1990, the median concen- tration in mosses has declined the most for lead (77%), followed by vanadium (55%), cadmium (51%), chromium (43%), zinc (34%), nickel (33%), iron (27%), arsenic (21%, since 1995), mercury (14%, since 1995) and copper (11%). Between 2005 and 2010, the decline ranged from 6% for copper to 36% for lead; for nitrogen the decline was 5%. Despite the Europe-wide decline, no changes or increases have been observed between 2005 and 2010 in some (regions of) countries
Heavy metals and nitrogen in mosses : spatial patterns in 2010/2011 and long-term temporal trends in Europe by Harry Harmens( Book )

1 edition published in 2013 in English and held by 2 WorldCat member libraries worldwide

Are cadmium, lead and mercury concentrations in mosses across Europe primarily determined by atmospheric deposition of these metals?( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

This study aimed at investigating correlations between heavy metalModelled heavy metal deposition data and data on the concentration of heavy metals in naturally growing mosses were integrated into a geographic information system and analysed by means of bivariate rank correlation analysis and multivariate decision trees. Modelled deposition data were validated annually with deposition measurements at up to 63 EMEP measurement stations within the European Monitoring and Evaluation Programme (EMEP), and mosses were collectedat up to 7,000 sites at 5-year intervals between 1990 and 2005. concentrations in mosses and modelled deposition values as well as otherResults and discussion site-specific and regional characteristics to determine which factorsModerate to high correlations were found between cadmium and lead concentrations in mosses and modelled atmospheric deposition of these metalsČ Spearman rank correlation coefficients were between 0.62 and 0.67, and 0.67 and 0.73 for cadmium and lead, respectively (p<0.001). Multivariate decision tree analyses showed that cadmium and lead concentrations in mosses were primarily determined by the atmospheric deposition of these metals, followed by emissions of the metals. Low to very low correlations were observed between mercury concentrations in mosses and modelled atmospheric deposition of mercury. According to the multivariate analyses, spatial variations of the mercury concentration in mosses was primarily associated with the sampled mossspecies and not with the modelled deposition, but regional differences in the atmospheric chemistry of mercury and corresponding interactions with the moss may also be involved. primarily affect cadmium, lead and mercury concentrations in mosses. TheConclusions resulting relationships could potentially be used to enhance the spatialAt least for cadmium and lead, concentrations in mosses are a valuable tool in determining and mapping the spatial variation in atmospheric deposition acrossEurope at a high spatial resolution. For mercury, more studies are needed to elucidate interactions of different chemical species with the moss. resolution of heavy metal deposition maps across Europe
Nitrogen concentrations in mosses indicate the spatial distribution of atmospheric nitrogen deposition in Europe( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

N 2005/6, nearly 3000 moss samples from (semi-)natural location across 16 European countries were collected for nitrogen analysis. The lowest total nitrogen concentrations in mosses (<0.8%) were observed in northern Finland and northern UK. The highest concentrations (Ž1.6%) were found in parts of Belgium, France, Germany, Slovakia, Slovenia and Bulgaria. The asymptotic relationship between the nitrogen concentrations in mosses and EMEP modelled nitrogen deposition (averaged per 50 km * 50 km grid) across Europe showed less scatter when there were at least five moss sampling sites per grid. Factors potentially contributing to the scatter are discussed. In Switzerland,a strong (r2 = 0.91) linear relationship was found between the total nitrogen concentration in mosses and measured site-specific bulk nitrogen deposition rates. The total nitrogen concentrations in mosses complement deposition measurements, helping to identify areas in Europe at risk from high nitrogen deposition at a high spatial resolution
First Europe-wide correlation analysis identifying factors best explaining the total nitrogen concentration in mosses( )

1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide

In this study, the indicative value of mosses as biomonitors ofCooperativewereapplied. The Spearman rank correlation analysis showed that the total N concentration in mosses Programme on Effects of Air Pollution on Natural Vegetation and Crops (ICPand modelled N depositions and air concentrations are significantly correlated (0.53 rs 0.68, Vegetation). atmosphericconcentration in mosses on the other hand werep < 0.001). Correlations with other predictors were lower than 0.55. The CART analysis indicated that the investigated forModelled atmospheric N deposition and air concentration datavariation in the total N concentration in mosses was best explained by thevariation in NH4 were calculated using the Unified EMEP thefirst time at a European scale usingt concentrations nitrogen (N) depositionsModel of the European Monitoring and Evaluationin air,followed by NO2 concentrations in air, sampled moss species and total dry N deposition. Programme (EMEP) of the Convention on Long-range andcorrelation analyses. The analyses included data from mosses collected fromTransboundary Air Pollution (CLRTAP). The modelled deposition and concentration data encompass 2781 sites across Europevarious N compounds. In order to assess the correlations between moss tissue total N concentrations and
Metal accumulation in mosses across national boundaries : uncovering and ranking causes of spatial variation( )

1 edition published in 2008 in English and held by 2 WorldCat member libraries worldwide

his study aimed at cross-border mapping metal loads in mosses in eight European countries in 1990, 1995, and 2000 and at investigating confounding factors. Geostatistics was used for mapping, indicating high local variances but clear spatial autocorrelations. Inference statistics identified differences of metal concentrations in mosses on both sides of the national borders. However, geostatistical analyses did not ascertain discontinuities ofmetal concentrations in mosses at national borders due to sample analysis indifferent laboratories applying a range of analytical techniques. Applying Classification and Regression Trees (CART) to the German moss data as an example, the local variation in metal concentrations in mosses were proved to depend mostly on different moss species, potential local emission sources, canopy drip and precipitation
First thorough identification of factors associated with Cd, Hg and Pb concentrations in mosses sampled in the European surveys 1990, 1995, 2000 and 2005( )

1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide

He aim of this study was, for the first time ever, to thoroughly identify the factors influencing Cd, Hg and Pb concentrations in mosses sampled within the framework of the European Heavy Metals in Mosses Surveys 1990-2005. These investigations can be seen as a follow up of a previous study where only the moss data recorded in the survey 2005 was included in the analysis (Schröder et al. 2010). The analyses of this investigation give a complete overview on the statistical association of Cd, Hg and Pb concentrations in mosses and sampling site-specific and regional characteristics, encompassing data from 4661 (1990), 7301 (1995), 6764 (2000) and 5600 (2005) sampling sites across Europe. From the many metals monitored in the European moss surveys, Cd, Hg and Pb were used as examples, since only for these three metals deposition measurements are being recorded in the framework of the European Monitoring and Evaluation Programme (EMEP). As exemplary case studies revealed that otherfactors besides atmospheric deposition of metals influence the element concentrations in mosses, the moss datasets of the above mentioned surveys were analysed by means of bivariate statistics and decision tree analysis in order to identify factors influencing metal bioaccumulation. In the analyses we used the metadata recorded during the sampling as well as additional geodata on, e.g., depositions, emissions and land use. Bivariate Spearman correlation analyses showed the highest correlations between Cd and Pb concentrations in mosses and EMEP modelled total deposition data (0.62ŽrsŽ0.73). For Hg the correlations with all the tested factors were considerably lower (e.g. total deposition r s Ž0.24). Decision tree analyses by means of Classification and Regression Trees (CART) identified thetotal deposition as the statistically most significant factor for the Cd and Pb concentrations in the mosses in all four monitoring campaigns. For Hg, the most significant factor in 1990 as identified by CART was the distance to the nearest Hg source recorded in the European Pollutant Emission Register, in1995 and 2000 it was the analytical method, and in 2005 it was the sampled moss species. The strong correlations between the Cd and Pb concentrations in the mosses and the total deposition can be used to calculate deposition maps with a regression kriging approach on the basis of surface maps on the elementconcentrations in the mosses
Mosses as biomonitors of atmospheric nitrogen deposition - potential application at Natura 2000 sites( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

Metallakkumulation in Moosen : Standörtliche unf regionale rendbedigungen des biominotoring von Luftverunreinigungen( )

1 edition published in 2008 in German and held by 2 WorldCat member libraries worldwide

Relationship between site-specific nitrogen concentrations in mosses and measured wet bulk atmospheric nitrogen deposition across Europe( )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Relationship between site-specific nitrogen concentrations in mosses and bulk atmospheric nitrogen deposition( )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Mosses as biomonitors of atmospheric POPs pollution : a review( Book )

1 edition published in 2011 in English and held by 1 WorldCat member library worldwide

 
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Spatial and temporal trends in heavy metal accumulation in mosses in Europe (1990-2005)
Languages
English (17)

German (1)

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