Subject: ECOLOG-L Digest - 28 May 2003 to 29 May 2003 (#2003-138)
There are 7 messages totalling 373 lines in this issue.
Topics of the day:
1. Successional model reviews?
2. ECOLOG--silphid beetle odor
3. Call for Pre-Proposals - American Bird Conservancy Small Grants Fund
4. SUMMARY: PCA and repeated-measures
5. postdoctal position available
6. Post-doc ad
7. Ecology Grad Student Position Available
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Date: Thu, 29 May 2003 05:53:57 -0400
From: =?iso-8859-1?q?Yves=20Claveau?= <yves_claveau@YAHOO.CA>
Subject: Re: Successional model reviews?
Hi Jonathan,
take a look at the paper of Porté (see below). It
may help you (or confuse you even more).
In your choice of model, you must keep in mind that
all models are good in their context. You have first
to define the scale at which you want to work and the
variables that influence successional dynamic. I
personnally work with SORTIE and it does a good work
in ecosystems where light drive forest dynamics. But
since it is a stand model, this is not the right tool
to study the impact of fire on the forest mosaic in
the boreal forest for example.
You also need to consider the ease of calibration
and consider that it might be helpful to modify the
code to adjust equations to your needs. Finally, you
need to evaluate the technical support you can have
from the team that build the model.
I hope this help.
Yves
CITED PAPER
Porté, A. and H.H. Bartelink 2002. Modelling mixed
forest growth: a review of models for forest
management. Ecol. Model. 150:141-188.
=====
Yves Claveau, Ph.D.
GREF interuniversitaire
Université du Québec à Montréal
Case postale 8888, Succursale Centre-Ville
Montréal Québec
H3C 3P8
Tél./Phone: (514) 987-3000 ext. 2357# Téléc./Fax: (514) 987-4647
__________________________________________________________
Lèche-vitrine ou lèche-écran ?
magasinage.yahoo.ca
------------------------------
Date: Thu, 29 May 2003 08:43:30 -0500
From: "Ryan K. Brook" <umbrook1@CC.UMANITOBA.CA>
Subject: Re: ECOLOG--silphid beetle odor
Silphid beetles can secrete a foul smelling, acidic fluid from the anus
that is produced by the rectal gland. Some species can direct this
discharge at potential predators by aiming the abdominal apex. For
further information, check out:
Eisner, T. and Meinwald, J. 1982. Defensive spray mechanism of a
silphid beetle. Psyche 89:357-367.
Ryan.
---------------------------------------------------------------
Ryan K. Brook
Environmental Science Program
University of Manitoba
231 Machray Hall
Winnipeg, Manitoba
Canada
R3T 2N2
cell: (204) 479-9147
res: (204) 638-4183
fax: (204) 275-3147
email: umbrook1@cc.umanitoba.ca
"...too many scientists are turning their backs on this "dirty
business" of natural resource management. Such is the
nation's loss. Yet, it will beincreasingly harder for scientists
to avoid the arena and to hide from the need and demand for applicable
knowledge. This is an exacting, tough, mean,and bruising
game. It is not a past time for wimps." Jack Ward Thomas
---------------------------------------------------------------
Dave Whitacre wrote:
>This weekend I was handling a silphid carrion beetle of the classic, =
>orange and black pattern. It emitted some dark droplets which, to me, =
>smelled much like the odor exuded by a garter snake upon handling. Has =
>anyone else noticed such a similarity in odor? Anyone know what =
>compound(s) create that odor? Thanks!
>
>David Whitacre
>The Peregrine Fund
>5668 West Flying Hawk Lane
>Boise, Idaho 83709
>(208) 362-3716
>
>
>
------------------------------
Date: Thu, 29 May 2003 12:18:58 -0400
From: "George E. Wallace" <gwallace@ABCBIRDS.ORG>
Subject: Call for Pre-Proposals - American Bird Conservancy Small Grants Fun
In 2003, ABC's William Belton Small Grants Fund, in partnership with the
U.S. Fish & Wildlife Service, will provide support for projects to =
conserve
Endangered and Critically Endangered bird species in Latin America and =
the
Caribbean. Conservation projects at sites identified by the Alliance for
Zero Extinction <http://www.zeroextinction.org/> as essential for the
conservation of Endangered and Critically Endangered bird species will =
be
given highest priority for support. Grant requests can include funding
requests for the development and implementation of conservation plans, =
the
development of new protected areas, community development projects to
protect key habitats, and other locally-based efforts to protect the =
sites
identified. Expeditions to search for "Lost Species" will also be
considered. For consideration, please submit letter of inquiry by e-mail =
to
Dr. Robert Chipley rchipley@abcbirds.org prior to 15 July 2003. The =
project
description should include the total cost of the project and the amount
requested from American Bird Conservancy. Work must be carried out by
nationals of Latin American and Caribbean counties. A full proposal will =
be
requested from those groups whose inquiries fit the program's priorities
most closely. Most grants will be for less than $5,000. Final decisions =
will
be made in December 2003. Please go to:
http://www.abcbirds.org/international/small_grants_2003.htm for more
details.
En 2003, el William Belton Small Grants Fund de ABC proporcionar=E1 =
fondos
para financiar proyectos significativos para la conservaci=F3n de las =
aves
amenazadas o en peligro de extinci=F3n en Am=E9rica Latina y el Caribe a =
los
sitios identificados por el "Alliance for Zero Extinction
<http://www.zeroextinction.org/> ". Requerimientos para fondos pueden
incluir fondos asignados para el desarrollo y implementaci=F3n de planes =
de
conservaci=F3n, el desarrollo de =E1reas protegidas nuevas, proyectos =
comunales
para proteger habitates claves, y otros esfuerzos comunales para =
proteger
sitios identificados. Consideramos tambi=E9n proyectos para buscar =
Especies
Perdidas. Estamos trabajando en conjunto con el Servicio de Pesca y Vida
Silvestre de los Estados Unidos (U.S. Fish and Wildlife Service) que
regularmente provee fondos adicionales. Favor de mandarnos por correo
electr=F3nico a Dr. Robert Chipley rchipley@abcbirds.org una carta breve
describiendo su proyecto. La fecha l=EDmite es el 15 de Julio de 2003. =
El
trabajo debe ser llevado a cabo por latinoamericanos o caribe=F1os. La
descripci=F3n del proyecto debe incluir el costo completo del proyecto y =
la
suma que se solicita de American Bird Conservancy. Las sumas donadas en =
a=F1os
recientes fueron usualmente no mas que $5,000. Despu=E9s de haber =
revisado
todas las descripciones sometidas, escogeremos los proyectos para los =
cuales
nos gustar=EDa recibir una propuesta detallada. Decisiones finales se =
har=E1n en
Diciembre de 2003. Para ver mas detalles, por favor visita:
http://www.abcbirds.org/international/small_grants_2003.htm.
George E. Wallace, PhD
Director of International Programs
American Bird Conservancy
P.O. Box 249, 4249 Loudoun Avenue
The Plains, VA 20198 USA
Tel: 540-253-5780
Fax: 540-253-5782
E-mail: <mailto:gwallace@abcbirds.org> gwallace@abcbirds.org
On the Web at <http://www.abcbirds.org> www.abcbirds.org
=20
------------------------------
Date: Thu, 29 May 2003 13:46:11 -0400
From: Christopher Beck <cbeck@BIOLOGY.EMORY.EDU>
Subject: SUMMARY: PCA and repeated-measures
Awhile back I post a question about how to carry out a PCA on a large
number of soil variables we had measured repeatedly in plots. Since
several people expressed interest in the answers to the questions, I
have compiled the responses below. Thanks to everyone who sent me their
suggestions.
1. Several people suggested non-metric multidimensional scaling (nms)
as an alternative to PCA, especially if the data weren't multivariate
normal. Further they suggested that the graphing function in PC-ORD
could be used to track changes within plots over time.
2. Two people suggested using MANOVA with repeated measures.
3. Another suggested time trajectory analyses.
4. One person advocated for the approach of doing a separate PCA for
each sampling date and then using the PCA scores in a repeated-measures
ANOVA. (Note: I tried this, but the factor loadings changed
considerably over time making the factor scores difficult to interpret.)
5. One person suggested doing a PCA for each plot for each sampling
date followed by longitudinal regression.
Diggle PJ, Liang K, Zeger S. Analysis of longitudinal data.
Clarendon Press, Oxford.
Liang K, Zeger SL. 1986. Longitudinal data analysis using
generalized linear models. Biometrika 73: 13-22.
McCulloch CE, Searle SR. 2001. Generalized, linear, and mixed
models. John Wiley & Sons, Inc.
What we ultimately decided to do was to divide our 11 dependent
variables into smaller groups based on ecological principles (e.g.,
micronutrients, limiting macronutrients, non-limiting macronutrients,
physical parameters) and then carry out MANOVAs with repeated measures
on each group of response variables. This way the results of the
analysis could be more easily interpretted. We found that the MANOVA
with repeated measures is easily implemented in SPSS.
--
Dr. Christopher Beck
Department of Biology
Emory University
1510 Clifton Rd.
Atlanta, GA 30322
Email: cbeck@biology.emory.edu
Phone: 404-712-9012
FAX: 404-727-2880
------------------------------
Date: Thu, 29 May 2003 15:07:14 -0400
From: Brian Inouye <binouye@BIO.FSU.EDU>
Subject: postdoctal position available
Postdoctoral position in plant-insect interactions/population dynamics
Postdoctoral position available starting Fall 2003 to develop collaborative
research in plant-insect interactions/population dynamics. This position is
ot
tied to a particular research project, but rather an opportunity to develop
new project capitalizing on your strengths. Both empirical and theoretical
projects would be appropriate. One year of funding is available, and
responsibilities for first year include collaborating on grant proposal to f
nd
continued research after the first year. For empirical work, research on loc
l
natural or agricultural systems preferred. See the following website for mor
information on current work in the lab
(http://bio.fsu.edu/~nunderwood/homepage/). The Ecology and Evolution group
t
FSU is very interactive with a strong tradition in plant-herbivore interacti
ns
and research at the interface of ecology and evolutionary biology. See the
department website for more information on current faculty
(http://www.bio.fsu.edu/ee/index.html). Applications should include a statem
nt
of your research interests, outline of projects you are interested in pursui
g,
CV, and contact information for three references.
To apply or for more information contact Nora Underwood at
nunderwood@bio.fsu.edu or mail to Dr. Nora Underwood, Department of Biologic
l
Sciences, Florida State University, Tallahassee FL 32306-1100, USA.
Florida State University is an Equal Opportunity/Affirmative Action employer
committed to diversity in hiring, and a Public Record Agency.
------------------------------
Date: Thu, 29 May 2003 15:10:40 -0400
From: Brian Inouye <binouye@BIO.FSU.EDU>
Subject: Post-doc ad
Postdoctoral position in host-parasitoid interactions.
Postdoctoral position available starting Fall 2003. The postdoctoral
researcher will be responsible for assisting with experiments on the effects
of
resource heterogeneity on host-parasitoid population dynamics. Candidates wi
l
ideally also develop new collaborative work on aspects of host-parasitoid
interactions. Any level from the individual to community, evolutionary or
ecological, and both empirical or theoretical projects would be appropriate
or
collaborative work. One year of funding is available and further funding is
possible. The Ecology and Evolution group at FSU is very interactive with a
strong tradition of research at the interface of ecology and evolutionary
biology. See the department website for more information
<http://www.bio.fsu.edu/ee/index.html>. Applications should include a
over
letter with a brief statement of your research interests, CV, and contact
information for three references.
To apply or for more information contact Brian Inouye at binouye@bio.fsu.edu
or
mail to Dr. Brian Inouye, Department of Biological Sciences, Florida State
University, Tallahassee FL 32306-1100, USA.
Florida State University is an Equal Opportunity/Affirmative Action employer
committed to diversity in hiring, and a Public Record Agency.
------------------------------
Date: Thu, 29 May 2003 19:21:58 -0400
From: Elise Pendall <pendall@UWYO.EDU>
Subject: Ecology Grad Student Position Available
USDA-Funded Graduate Student Position Available
The Ecosystem Ecology Laboratory of Dr. Elise Pendall and the Plant
Physiological Ecology Laboratory of Dr. Brent E. Ewers at the University of
Wyoming (http://uwyo.edu/botany) are seeking a student interested in
pursuing M.S. or Ph.D. degree in Ecology. The student will be co-advised,
with funding from a USDA-NRI Managed Ecosystems grant to investigate the
impact of fire on water and carbon fluxes from sagebrush steppe in Wyoming.
In addition to being advised by Drs. Pendall and Ewers, the successful
applicant will work closely with a post-doc on the project.
Examples of potential research questions include 1) How do vegetation
dynamics change over a sagebrush steppe burn chronosequence? 2) What are the
mechanisms controlling carbon and water fluxes across a sagebrush steppe
burn chronosequence? 3) What are the interactive effects of global change
and fire management on regional carbon and water fluxes from sagebrush
steppe? The project will use canopy gas exchange chambers, soil respiration,
sap flux, leaf gas exchange and stable isotopes of carbon, oxygen, and
hydrogen to answer these and other potential questions.
The successful applicant is expected to be energetic, highly motivated, and
capable of pursuing innovative research questions and able to work for
extended periods under field conditions with limited supervision. The
position is available immediately and applications will be accepted until a
suitable candidate is found. Initial inquiries can be made to Dr. Ewers
(beewers@uwyo.edu; 307-766-2625) or Dr. Pendall (pendall@uwyo.edu;
307-766-6293). To apply, please submit via email, to both Drs. Pendall and
Ewers, a cover letter detailing relevant background and a statement of
interest, curriculum vitae, and complete contact information (include e-mail
address and telephone number) for three references
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End of ECOLOG-L Digest - 28 May 2003 to 29 May 2003 (#2003-138)
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Thanks to discussion with TVR, I have decided to put a link to back files of the discussion group. This months back files.
The link to complete archives is available elsewhere.
This text was originally an e-mail. It was converted using a program
RUPANTAR- a simple e-mail-to-html converter.
(c)Kolatkar Milind. kmilind@ces.iisc.ernet.in