2,187 research outputs found
Integrated classification and assessment of lakes in Wales: phase IV. A report to the Countryside Council for Wales: contract no. FC 73-01-71
No full textIntegrated classification and assessment of lakes in Wales: Phase II
No full textThis report presents preliminary data from the second phase of the study on integrated
classification and assessment of lakes in Wales. The classification and assessment project is
described in detail by Allott et al. (1994).
Ten lakes, listed on the following page are in the process of assessment. The report includes
data on water chemistry and physical variables, aquatic macrophyte distribution maps, and
species lists of aquatic macrophytes, epilithlic diatoms, open water zooplankton and littoral
macroinvertebrates. Methodologies follow those given by Allott et al. (1994).
A second report in July 1995 will incorporate further site specific information, including full
site descriptions, sampling site information, and additional chemistry, littoral cladoceran and
surface sediment diatom data. Further development of classification techniques will require
a minimum of thirty lake integrated data sets
Chemical trends at lakes and streams in the UK Acid Waters Monitoring Network, 1988-2000: evidence for recent recovery at a national scale
No full textA detailed trend analysis of 12 years of data (1988-2000) for 22 surface waters in acid-sensitive regions of the United Kingdom, in which individual site data have been combined to identify national-scale trends, has shown strong common patterns of temporal variation. Results suggest a widespread reduction in sulphate concentrations, hydrogen ion and inorganic aluminium species, and increases in acid neutralising capacity. Many chemical changes have not been linear. However, the first five years were characterised by high concentrations of marine ions and relatively stable pollutant sulphate concentrations and the remaining period by lower concentrations of marine ions and declining sulphate. Genuine "recovery", in terms of declining acidity in response to reduced anthropogenic sulphur deposition is only apparent, therefore, for the latter part of the monitoring period. Reductions in calcium concentrations appear to have partially offset the influence of sulphate reductions on acidity, as have increases in organic acidity associated with strong and widespread rising trends in dissolved organic carbon. Fluctuations in a number of climatic factors over the monitoring period have led to significant inter-annual variability in nitrate, which exhibits little long-term trend, marine ions and acidity, emphasising the need for long monitoring periods if underlying trends are to be correctly identified
The United Kingdom Acid Waters Monitoring Network Data Report for 2005-2006 (year 18)
No full textThe UK Acid Waters Monitoring Network (UKAWMN) has been operating continuously
since 1988. During the first ten years biological and chemical data were summarised in
an annual series of printed reports From the year 2000 annual data reports have also
been available from the UKAWMN web page. These are of a similar format to earlier
annual reports but focus on graphical representations of time trends in raw data and
diagnostic statistics (e.g. species richness and diversity indices). Detailed analysis of
data is presented in two interpretative reports, Monteith (2005) and Monteith and Evans
(2000) dealing with 15 and 10 years of accumulated results respectively. Both are also
available on the UKAWMN web page. A full description of sampling methods and
analytical procedures, together with site descriptions, are also presented on the
UKAWMN web page
The United Kingdom Acid Waters Monitoring Network Data Report for 2000-2001 (year 13)
No full textThe UK Acid Waters Monitoring Network (UKAWMN) has been in continuous operation since 1988. For the first ten years biological and chemical data were summarised in an annual series of printed reports and these were followed by a detailed analysis of data in an interpretative report (Monteith and Evans, 2000), which is available on the UKAWMN web page. From this year annual data reports will be solely available from the UKAWMN web page. These will be of a similar format to earlier annual reports but will primarily concentrate on graphical representations of time trends in raw data and diagnostic statistics (e.g. species richness and diversity indices).
A full description of sampling methods and analytical procedures, together with site descriptions, is presented in Patrick et al. (1991)
The United Kingdom Acid Waters Monitoring Network Data Report for 2001-2002 (year 14)
No full textThe UK Acid Waters Monitoring Network (UKAWMN) has been in continuous operation since
1988. For the first ten years biological and chemical data were summarised in an annual series of
printed reports and these were followed by a detailed analysis of data in an interpretative report
(Monteith and Evans, 2000), which is available on the UKAWMN web page. From the year 2000
annual data reports have been available from the UKAWMN web page. These are of a similar
format to earlier annual reports but focus on graphical representations of time trends in raw data
and diagnostic statistics (e.g. species richness and diversity indices). An analytical report,
providing an interpretation of the first 15 years of data will be completed and made available on
the web page toward the end of 2003. A full description of sampling methods and analytical
procedures, together with site descriptions, is presented in Patrick et al. (1991)
The United Kingdom Acid Waters Monitoring Network Data Report for 2003-2004 (year 16)
No full textThe UK Acid Waters Monitoring Network (UKAWMN) has been in continuous operation
since 1988. For the first ten years biological and chemical data were summarised in an
annual series of printed reports and these were followed by a detailed analysis of data in
an interpretative report (Monteith and Evans, 2000), which is available on the UKAWMN
web page. From the year 2000 annual data reports have been available from the
UKAWMN web page. These are of a similar format to earlier annual reports but focus on
graphical representations of time trends in raw data and diagnostic statistics (e.g.
species richness and diversity indices). An analytical report, providing an interpretation of
the first 15 years of data will be completed and made available on the project web page
in the near future. A full description of sampling methods and analytical procedures,
together with site descriptions, is presented in Patrick et al. (1991)
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