Acidity Fluctuations at a Broadland Site in Norfolk

Gosling, Laura; Baker, Simon

doi:10.2307/2402343

Cited by 27 publications

(9 citation statements)

References 10 publications

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“…Changes in wetland can have large effects on the catchment water quality as wetlands often trap different elements such as sulphate (Devito, 1995;Devito and Hill, 1997), nitrogen, phosphorous (Devito and Dillon, 1993) and methylmercury (Branfireun et al, 1996). Stream acidification caused by episodic SO 2À 4 release from wetlands following droughts has been reported in several studies, (Braekke, 1981;Wieder, 1985;Bayley et al, 1986;Van Dam, 1986), and acidification of water has also been linked to fish mortality (Gosling and Baker, 1980;Holopainen and Oikari, 1992). Studies have also shown that extended dry periods might have important consequences on the release of greenhouse gases (Roulet et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components

Kværner

Kløve

2006

Journal of Hydrology

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Section: Introductionmentioning

confidence: 99%

Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components

Kværner

Kløve

2006

Journal of Hydrology

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“…Brammer & Forsberg, 1984). Similar increases of 7. buthosus after tbe drought of 1976 are reported by Sykora (1979) and Gosling & Baker (1980) in moorland pools and ditches respeetively. Aulio (1987) observed a decrease of this species in a reservoir with decreasing acidity.…”

Section: Biotogy After Droughtmentioning

confidence: 90%

Acidification of three moorland pools in The Netherlands by acid precipitation and extreme drought periods over seven decades

Dam¹

1988

Freshwater Biology

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1. Relations between acidification by atmospheric deposition, water depth and the occurrence of dry summers in this century, as well as their effects on chemistry, macrophytes and diatoms in three moorland pools, are described.2. Direct observations and biological data indicate a decrease of pH by c. 0.5 unit over a period of seven decades in a pool where 20% of the bottom desiccates in extremely dry years, and 2 pH units over the same period in a pool where 70% of the bottom is exposed to the atmosphere in such years.3. Acidification promotes the growth of Juncus bulhosus L., Sphagnum and the acidobiontic diatom Eunotia exigua (Breb.) Rabenh. and suppresses the growth of isoetids (e.g. Lobelia dortmanna L.) and of acidophilous and circumneutral diatoms. Also the acidobiontic Frustidia rhomhoidcs var. saxonica (Rabenh.) Toni and Navicula sublilissima Cleve, characteristic of humic waters, decline by acidification.4. In two pools where more than half of the bottom desiccated in 1976, observed concentrations of sulphate were highest in 1977-78 and decreased later on. Juncus bulbosus had a maximum in 1977-80. Eunolia exigua became the dominant diatom after 1976 and decreased after 1981 in the pool with the shortest residence time (3 years).5. In desiccating pools the long-term decrease of pH is apparently much larger than in softwater lakes in Scandinavia and North America. During the last 50 years, pH dropped rapidly after dry summers, probably due to oxidation of sulphur and nitrogen compounds which were originally derived from the atmosphere, reduced and stored in the sediments. Rapid falls in pH were followed by an increase, presumably due to alkalinity production during sulphate reduction and denitrification. 157

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“…This resulted in fish death and invasions of the filamentous alga Tribonema minus and the macrophyte Juncus bulbosus, while some of the original species declined. After addition of lime a number of plants and animals recolonized the ditches (Gosling and Baker 1980).…”

Section: Fenlandsmentioning

confidence: 99%

Effects of climatic change on chemistry and vegetation of peatlands, with special reference to interaction with atmospheric deposition

Dam¹,

Beltman

1992

Wetlands Ecol Manage

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This paper summarizes expected changes in hydrology, chemistry and biota of Dutch peatlands (bogs, fens and moorland pools) caused by climatic changes resulting from the Greenhouse Effect. Special attention is paid to the interaction with atmospheric acid deposition. In both bogs and moorland pools prolonged drought periods may cause deleterious effects on biota because of the release of atmospherically-derived reduced sulphur compounds. In fenlands negative changes will be caused by eutrophication due to increased supply of allochtonous water. Long-term water and nutrient budgets are needed, along with better predictions of expected climate changes, to develop models of changes in hydrology, chemistry and biota of peatlands.

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Acidity Fluctuations at a Broadland Site in Norfolk

Cited by 27 publications

References 10 publications

Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components

Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components

Acidification of three moorland pools in The Netherlands by acid precipitation and extreme drought periods over seven decades

Effects of climatic change on chemistry and vegetation of peatlands, with special reference to interaction with atmospheric deposition

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