Linked Life Data

11846071

Source:http://linkedlifedata.com/resource/pubmed/id/11846071

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2002-2-15
pubmed:abstractText
Continuous pH, dissolved oxygen and temperature information for three sites on the upper portion of the River Kennet, a tributary of the Thames in southern England is presented. A thermodynamic model is developed which links this information to weekly water quality data allowing the estimation of dissolved carbon dioxide and calcite saturation levels within the river on a continuous basis. The results show a dynamic and variable system along the length of the river. Marked diurnal patterns are observed for pH, dissolved oxygen, dissolved carbon dioxide and calcite saturation and the highest fluctuations occur during the summer months. There is also a marked gradient downstream in average pH (7.5-8.0) and dissolved carbon dioxide (30-10 times atmospheric pressure). Dissolved oxygen levels average approximately 100% saturation across all sites, and the diurnal pattern occurring during the summer months declines downstream. The waters are permanently oversaturated with respect to calcite and the diurnal patterns of change are maximal during the summer months. The results are discussed in relation to: (a) the balance between photosynthesis and respiratory processes; (b) the relative interchanges between the sediment/plant interface with the water column; and (c) the rates of degassing of carbon dioxide and oxygen between the river surface and the atmosphere.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0048-9697
pubmed:author
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
282-283
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
205-31
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Diurnal and longer term patterns in carbon dioxide and calcite saturation for the River Kennet, south-eastern England.
pubmed:affiliation
Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK. c.neal@ceh.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't