workshop on multivariate stat. analysis in ecotoxicology

Chuck Miller rellim at MAILHOST.TCS.TULANE.EDU
Mon Sep 23 17:49:12 EST 1996

Cross posting from bionet.announce.....

Please find attached below finalised details of the forthcoming workshop.
If you require any further information feel free
to contact me directly.


Dr Tim Kedwards
ZENECA Agrochemicals
Ecological Risk Assessment Section
Jealott's Hill Research Station
Bracknell, UK
RG42 6ET

Tel: +44 (0) 1344 414107
Fax: +44 (0) 1344 414124
Email: Tim.T.J.Kedwards at gbjha.zeneca.com
Disclaimer:- 'The opinions expressed herein are my personal opinions
and do not necessarily represent those of my employer'



Saturday, 16 November 1996, 8:30 - 5:30, Washington Hilton and Towers
Presented in conjunction with the SETAC 17th Annual Meeting,
Washington, D.C.


Frameworks for ecological risk assessment often culminate in the evaluation
of effects under simulated or actual
environmental conditions. A fundamental objective of such semi-field and
field studies is to investigate effects at the
community and ecosystem level. To this end, data are collected on a large
number of ecological variables. Study types
include manipulative experiments (artificial streams, mesocosms,
terrestrial field trials), environmental monitoring
(before/after, upstream/downstream), and ecological surveys (plants, bird

Data from these studies are usually evaluated by using univariate
statistics (e.g. analysis of variance,
concentration-response regression). These techniques have limitations
because it is only possible to look at a small number
of variables within the ecosystem at any one time, limiting effects
determination to the population level, whereas the
objective is normally to understand effects at higher levels of organisation.

The advent of greater computing power and recent developments of new
multivariate statistical tools has made available a
variety of techniques (e.g. CANOCO, RIFFLE, PRIMER) with the potential to
overcome some of these previous limitations.
Consequently, there is growing interest among ecotoxicologists in applying
such techniques to field studies in order to be
able to generate true community and ecosystem endpoints. This workshop will
provide an excellent opportunity for interested
individuals to meet and exchange views on these approaches and allow
developers of the statistical approaches to discuss the
development and application of the techniques.

The objective of this workshop is to provide information on and generate
discussion of multivariate statistical techniques
in ecotoxicological field studies, focusing on the application of
techniques for generating community and ecosystem level
statistics, rather than mathematical derivation.

Attendance will be limited to 100 people to maximise information exchange.

Registration is first-come, first served. The registration fee is $225, and
forms can be obtained from the SETAC Office.

Workshop proceedings will be provided to all registrants at no additional
cost, and will be available for purchase by others
after the workshop.

SETAC Office, 1010 North 12th Avenue, Pensacola, Florida 32501
T +1 904-469-1500 F +1 904-469-9778
E setac at setac.org, http://www.setac.org

The format of the workshop has now been finalised. It will be in two
Sessions, the first comprising three presentations
addressing the current situation concerning the analysis of
ecotoxicological field studies. Professor Jim Kennedy, from the
University of North Texas, will be speaking on designed experiments and the
relative strengths and weaknesses of current
analytical procedures. This will followed by a presentation from Dr Mike
Harrass, AMOCO Corporation, outlining monitoring
and survey work in ecotoxicology. The last presentation of the session will
be given by Dr Tony Maciorowski, United States
Environmental Protection Agency, and will provide a regulatory perspective
of ecotoxicological field studies.

The second Session aims to address the multivariate statistical methods
currently used in ecotoxicology. It will also
include a review of new and novel methods currently being used elsewhere
and which may prove beneficial in the
ecotoxicological arena. The first presentation will be given by Tim Sparks
from the Institute of Terrestrial Ecology in the
UK. Tim will review traditional multivariate methods and will give examples
of their uses in ecology and ecotoxicology. The
second presentation will be given by Professor Geoff Matthews (University
of West Washington) addressing, amongst others,
the non-metric clustering program RIFFLE which has successfully been used
in ecotoxicological studies. This will be followed
by a talk by Mr Paul van den Brink (SC-DLO, Netherlands) outlining the
recent application of the CANOCO package to
freshwater field testing. Dr Bob Clarke (Plymouth Marine Laboratory, UK)
will present the application of the PRIMER package
to similar studies. These latter three talks form the centre of current
multivariate statistics expertise in the
ecotoxicology. After a suitable discussion period the final talk will be
presented by Professor Wojtek Krzanoswki
(University of Exeter, UK), who will talk about new and novel methods of
potential value to ecotoxicology but not yet

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