Pressure classification methodology?
jon.brodie at jcu.edu.au
Tue Mar 4 18:10:04 EST 2003
sarah hamylton wrote:
> Hello everyone,
> I was wondering if someone could advise me on some work I am doing for my
> dissertation. I am seeking a classification scheme for categorising
> reefs on the basis of the pressure they are under. Thus far, I have only
> been able to find a report that uses distance from the nearest populated
> area- this is included in my data set but doesn't give any indication of
> the type of pressure. I am not really interested in quantifying the
> impact intensity, just classifying reefs based on the presence of each
> pressure. The data set I have is similar to a Reefcheck one- it assesses
> a number of pressures on a semi-quantitative scale- rating presence from
> none to heavy. Im tempted to make up my own classification scheme,
> assigning weights to the different influences and then attempting to
> justify the weightings I have used. Justification would be based on
> impact magnitude in terms of frequency/ damage potential. Maybe also
> incorporating papers written on influences that are known to be
> particularly problematic in the study area. I cant help thinking that
> this will become a little subjective though, I am tempted to weight the
> presence of sewage pollution heavier than tourist diving as the latter
> is present at all my study sites whereas the former only has a presence
> at three out of twenty two study sites. Does anyone know of any set
> methodologies for categorising individual reefs on the basis
> anthropogenic pressures present?
> Any help would be much appreciated.
> Sarah Hamylton.
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Have you seen the Price et al 1998 paper on just such a methodology for
the Red Sea coast of Saudi Arabia - in Environmental Conservation 25(1):
65-76. The Reefs at Risk approach is also worth a look - see Bryant et
al, 1998 'Reefs at Risk' published by WRI, ICLARM WCMC and UNEP.
Principal Research Scientist
Australian Centre for Tropical Freshwater Research
James Cook University
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