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- W2328564694 abstract "SHORT COMMUNICATION HYDROCHEMICAL CHARACTERISTICS OF THE OPEN-WATER HABITATS OF SELECTED IRISH PEATLANDS Edel Hannigan and Mary Kelly-Quinn INTRODUCTION Peat is more than 90% water (Shotyk 1988), but the chemical composition of that water can be affected by a number of environmental factors, including geology and hydrology (Shotyk 1988). The vegetation present may also affect how quickly and effectively nutrients are utilised (Shotyk 1988), and seasonal changes may determine the amount of nutrients present for the vegetation to use, particularly in ombrotrophic bogs, which rely solely on rainwater for their supply of nutrients (Proctor 1994; Vitt et al. 1995; Tahvanainen et al. 2003). Many of the studies outside of Ireland have focused on the interaction between the chemical composition of bog water and the vegetation present (Clymo 1964; 1973; Hayward and Clymo 1982; Vitt and Bayley 1984; Vitt and Chee 1990; Tahvanainen 2004). Other studies have investigated a possible link between water chemistry and vegetation along a mineral-rich to mineral-poor gradient (Bendell-Young and Pick 1997; BendellYoung 1999; 2003; Tahvanainen 2004). Numerous studies have examined seasonal variation in water chemistry (Gorham 1956; Clymo 1984; Proctor 1994); however, little has been published in relation to Irish bogs. Much of the work undertaken to describe the water chemistry of Irish bogs has been conducted by Proctor (1992; 2008). This most recent work gave a relatively complete account of the water chemistry of a number of Irish bogs (Proctor 2008). However, that study was based on data collected ten to twenty years ago and there have been no recent updates and little consideration of seasonal effects. The aim of the present study was to provide more recent data and to investigate within and between site differences as well as any seasonal variation in hydrochemistry across a range of peatland sites. Given the importance of peatlands in the carbon cycle (Gorham 1991; Clark et al. 2005) and the serious threat of climate change (Knorr et al. 2005), such updated data provide a baseline against which future changes may be measured. There is growing evidence that changes in temperature and acid deposition may be affecting concentrations of dissolved organic carbon in freshwaters (Evans et al. 2005), and this may have implications for the biological and chemical characteristics of peatland aquatic habitats and the surface waters emerging from them. MATERIAL AND METHODS STUDY AREA Eight sites were chosen from the four Irish peatland types: Atlantic blanket bog, mountain blanket bog, raised bog and fen. The three Atlantic blanket bogs were Owenirragh bog (54816?N, 9837?W), Knockmoyle (54809?N, 9834?W) and Bellacorick (54809?N, 9830?W). All are located in north County Mayo. The two raised bogs were Clara bog in County Offaly (53819?N, 7838?W) and Carrowbehy bog in County Roscommon (53847?N, 8849?W). The mountain blanket bogs included Kippure bog in County Wicklow (53809?N, 6817?W), and Fiddandary (54808?N, 8856?W) in County Mayo. The single fen site was Scragh bog in County Westmeath (53834?N, 7821?W). Three aquatic habitats were included in this study: pools 100m2 , pools 10100m2 and Sphagnum hollows. Where possible three replicates of each habitat were sampled at the various sites where it occurred. However, due to a limited amount of open-water in some sites this was not always possible. Table 1 indicates the habitats present at each study site and the number of replicates of each sampled. SAMPLING METHODS AND ANALYSIS Water was collected from available habitats at all sites in one-litre polypropylene bottles in spring (April/May) and autumn (August/September) 2006, spring 2007 and autumn 2008. Designated bottles were assigned to each site and stored filled Received 19 May 2014. Accepted 29 August 2014. Published 30 September 2014. Edel Hannigan (corresponding author; email: edelhannigan@ hotmail.com) and Mary Kelly-Quinn, Freshwater Biodiversity, Ecology and Fisheries Research Group, School of Biology and Environmental Sciences, Science Centre West, University College Dublin, Belfield, Dublin 4, Ireland. Cite as follows: Hannigan, E. and Kelly-Quinn, M. 2014 Hydrochemical characteristics of the open-water habitats of selected Irish peatlands. Biology and Environment: Proceedings of the Royal Irish Academy 2014. DOI: 10.3318/ BIOE.2014.23 DOI: 10.3318/BIOE.2014..." @default.
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- W2328564694 title "Hydrochemical characteristics of the open-water habitats of selected Irish peatlands" @default.
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