Subject: ECOLOG-L Digest - 4 Jun 2003 to 5 Jun 2003 (#2003-144)
There are 8 messages totalling 480 lines in this issue.
Topics of the day:
1. Pew Report Finds U.S. Oceans in Crisis
2. Sustainability Indicators Conference in Lithuania
3. What if we had both linear and curvilinear relationships? (2)
4. ULM population modelling program available
5. marking grass shrimp
6. Invitation to ESA workshop - Leveraging the Atmospheric Radiation
Measurement (ARM) Data Archive for Carbon Modelers
7. INTERPRETIVE PROGRAMS SUPERVISOR
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Date: Thu, 5 Jun 2003 09:26:30 -0400
From: Karen Claxon <kclaxon@EARTHLINK.NET>
Subject: Pew Report Finds U.S. Oceans in Crisis
The 144 page report, entitled "America's Living Oceans: Charting a
Course for Sea Change" took three years to develop and was funded by the
Pew Charitable Trusts, a $4 billion foundation created by the children
of the founder of Sun Oil, now known as Sunoco. The commission's 18
bipartisan members were drawn from fields of marine science, commercial
and recreational fishing, private industry, conservation, government and
economics.
http://ens-news.com/ens/jun2003/2003-06-04-10.asp
------------------------------
Date: Thu, 5 Jun 2003 07:33:39 -0700
From: "Prof. Walter Leal Filho" <lealfilho@YAHOO.COM>
Subject: Sustainability Indicators Conference in Lithuania
Dear Colleagues,
The project BEIDS (Baltic Environmental Information
Dissemination System - http://www.beis.de) is
co-organising a specialist event which will look at
sustainability indicators in the Baltic Sea region.
Titled "SIID 2003", the event will be held from 9 to
11 October in the city of Vilnius, Lithuania. It will
provide a forum for the presentation and discussion of
the recent work on theoretical aspects and the
practice of sustainable development implementation.
The aim of the conference is to encourage and
facilitate the interdisciplinary communication amongst
scientists, engineers, economists, sociologists and
professionals working in sustainable development and
related fields. Emphasis will be given to those areas
that will most benefit from the application of
scientific methods for sustainable development,
including sustainability indicators on various levels
as well as intellectual, informational and economic
tools for decisions in the sustainable development
policy.
Further details at: http://www.mii.lt/SIID-2003
=====
Prof Walter Leal Filho, TuTech, Kasernenstr. 12, D-21073 Hamburg, Germany.
__________________________________
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------------------------------
Date: Thu, 5 Jun 2003 06:25:10 -0700
From: "Alexandre F. Souza" <alexfadigas@YAHOO.COM>
Subject: What if we had both linear and curvilinear relationships?
Dear friends,
Suppose we had a dependent variable, say growth, and
a number of independent explanatory variables, like
light and size of nearest neighbour, both log
transformed due to strong deviations from normality.
If these variables were related to growth in a linear
way, it is easy: we perform multiple stepwise linear
regression. But what if one or more of these variables
were related to growth in a curvilinear way, while the
other one, in a linear way?
Multiple regression would not be possible or
desirable. Do someone has any experience with this
kind of problem, in order to give any ideas?
Thank you very much in advancement for any ideas,
Sincerely,
Alexandre
=====
Alexandre F. Souza
Programa de Pѓs-Graduaчуo em Ecologia
Departamento de Botтnica/IB
Universidade Estadual de Campinas
Campinas, SP
Brasil
__________________________________
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Yahoo! Calendar - Free online calendar with sync to Outlook(TM).
http://calendar.yahoo.com
------------------------------
Date: Thu, 5 Jun 2003 09:52:49 -0600
From: David Inouye <inouye@umd.edu>
Subject: ULM population modelling program available
Dear list,
A new version of the ULM population modelling computer program is now
available.
What can be modeled ?
* any species life cycle graph (matrix models) (Caswell 1989, 2001),
* inter- and intra-specific competition, density dependence (non linear
systems),
* environmental stochasticity (Tuljapurkar 1990) (random processes),
* demographic stochasticity (branching processes),
* metapopulations, migrations (coupled systems).
Which results ?
* population trajectories, distributions,
* growth rate, population structure, generation times,
* sensitivities to changes in parameters, fitness landscape,
* probability of extinction, quasi-extinction, extinction times,
* lyapunov exponents, bifurcation diagrams.
The ULM program can be downloaded freely from the website:
www.biologie.ens.fr/ecologie/ecoevolution/legendre/legendre/ulm.html
This recent version is fully compatible with the previous one.
It is more efficient, has some new features, and a convenient
interface. The distribution contains a complete reference manual
together with example model files.
A variation of the ULM program, the ZEN program, allows to study
population dynamics with an evolutionary component in the line of
adaptive dynamics.
ZEN uses an individual-based (in fact "phenotype-based") approach with 3
components:
* Stochastic equations in discrete time describing the dynamics of finite
populations,
* Adaptive traits and their mutations (mutation rates and distributions),
* Ecological interactions between phenotypes.
During the ZEN simulation, mutant phenotypes, created by the triggering of
mutations, interact with resident phenotypes; they persist or go extinct,
possibly leading to evolutionary branching and polymorphism.
The ZEN program can be downloaded freely from the website:
www.biologie.ens.fr/ecologie/ecoevolution/legendre/legendre/zen.html
Stщphane
Legendre
Laboratoire d'Ecologie
Eco-Evolutionary team
Ecole Normale Supщrieure
46 rue d'Ulm
75230 Paris Cedex 05
www.biologie.ens.fr/ecologie/ecoevolution/legendre/index.fr.html
------------------------------
Date: Thu, 5 Jun 2003 11:10:17 -0500
From: Michael W Palmer <carex@OKSTATE.EDU>
Subject: Re: What if we had both linear and curvilinear relationships?
A few comments:
1) it might be worthwhile to log-transform explanatory variables on a priori
or biological grounds, but 'strong deviations from normality' is not a
reason. Linear least squares (LLS) methods only assume that errors in the
dependent variable are normally distributed.
2) stepwise methods are great for some purposes, but are probably among
the most abused methods by ecologists. Stepwise methods should not be an
'easy', first resort, method - unless you are truly interested in
exploratory analysis. If you use stepwise methods, you might as well
forget about trusting p-values.
3) I don't understand why multiple regression is not possible or
desirable, as long as the question involves fitting a dependent variable
to one or more independents.
4) If the curvilinearity is still monotonic (the relationship either goes
up or down but not both) then the best thing to do would probably be to
find a transformation of the explanatory variable that makes the
relationship more or less linear. Depending on the details, this could be
something like x^.5, 1/x, 1/(x+1), etc.
5) if the curvilinearity involves an increasing and a decreasing slope,
then including a polynomial term (i.e. both x and x^2) would allow a
better fit of the data - though of course adding new variables gobble up
precious degrees of freedom.
Michael W. Palmer
Botany Dept. OSU
104 LSE Stillwater OK 74078 USA
405-744-7717 fax:405-744-7074
http://ecology.okstate.edu/
http://www.okstate.edu/artsci/botany/
carex@okstate.edu
"Alexandre F. Souza" <alexfadigas@YAHOO.COM>
Sent by: "Ecological Society of America: grants, jobs, news"
<ECOLOG-L@LISTSERV.UMD.EDU>
06/05/2003 08:25 AM
Please respond to "Alexandre F. Souza"
To: ECOLOG-L@LISTSERV.UMD.EDU
cc: (bcc: Michael W Palmer/bot/cas/Okstate)
Subject: What if we had both linear and curvilinear relations
ips?
Dear friends,
Suppose we had a dependent variable, say growth, and
a number of independent explanatory variables, like
light and size of nearest neighbour, both log
transformed due to strong deviations from normality.
If these variables were related to growth in a linear
way, it is easy: we perform multiple stepwise linear
regression. But what if one or more of these variables
were related to growth in a curvilinear way, while the
other one, in a linear way?
Multiple regression would not be possible or
desirable. Do someone has any experience with this
kind of problem, in order to give any ideas?
Thank you very much in advancement for any ideas,
Sincerely,
Alexandre
=====
Alexandre F. Souza
Programa de Pѓs-Graduaчуo em Ecologia
Departamento de Botтnica/IB
Universidade Estadual de Campinas
Campinas, SP
Brasil
__________________________________
Do you Yahoo!?
Yahoo! Calendar - Free online calendar with sync to Outlook(TM).
http://calendar.yahoo.com
------------------------------
Date: Thu, 5 Jun 2003 10:35:18 -0700
From: Theodore Kennedy <tkennedy@USGS.GOV>
Subject: Re: marking grass shrimp
Here's a reference for marking crayfish that might be useful....basically
you brand them with a soldering iron and the marks are retained, even after
several molts. The paper includes a simple system for marking using dots
on different sections of the carapace that allows one to uniquely mark
1000's of individuals. Definitely do some trial and error first.....if the
soldering iron is left on too long the carapace will crack.
tk
Abrahamsson, S. A. A. 1965. A method of marking crayfish Astacus astacus
Linne in population studies. Oikos 16:228-231.
please note new phone and address
****************************************************************************
Ted Kennedy
Grand Canyon Monitoring & Research Center
USGS
2255 N. Gemini Dr.
Flagstaff, AZ 86001
(928) 556-7322
tkennedy@usgs.gov
|---------+---------------------------->
| | Teresa Manyin |
| | <manyin@CBL.UMCES|
| | .EDU> |
| | Sent by: |
| | "Ecological |
| | Society of |
| | America: grants, |
| | jobs, news" |
| | <ECOLOG-L@LISTSER|
| | V.UMD.EDU> |
| | |
| | |
| | 06/04/2003 07:01 |
| | PM |
| | Please respond to|
| | Teresa Manyin |
| | |
|---------+---------------------------->
>----------------------------------------------------------------------
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|
|
| To: ECOLOG-L@LISTSERV.UMD.EDU
|
| cc:
|
| Subject: marking grass shrimp
|
>----------------------------------------------------------------------
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I am looking for a cheap and easy way to mark/tag grass shrimp
(Palaemonetes pugio), for a period of one or two months in a laboratory
setting. I've seen a mark and recapture study in the literature, but the
authors did not explain how the shrimp were marked. Paint doesn't last
very long, due to frequent molting of the exoskeleton. Does anyone have
any suggestions?
Thanks,
Teresa Manyin
Graduate Student, MEES Program
Chesapeake Biological Laboratory
University of Maryland Center for Environmental Science
------------------------------
Date: Thu, 5 Jun 2003 14:48:52 -0400
From: Yetta Jager <jagerhi@ORNL.GOV>
Subject: Invitation to ESA workshop - Leveraging the Atmospheric Radiation
Measurement (ARM) Data Archive for Carbon Modelers
We would like to make researchers who are interested in terrestrial
biogeochemical and land surface modeling aware of an ARM Carbon Workshop,
which will immediately precede the Joint ESA/ISEM annual meeting in
Savannah, GA. The workshop will be a single afternoon, Sunday, August 3,
2003 12:30 - 4:30 pm, at the Savannah International Trade & Convention
Center. Cost: $12 per person.
Title: Leveraging the Atmospheric Radiation Measurement (ARM) Data Archive
for Carbon Modelers
Description:
The Atmospheric Radiation Measurement (ARM) Program obtains field
measurements to better understand the processes that control solar
radiative transfer in the atmosphere, in clouds, and at the earth's
surface. The ARM Program seeks to increase awareness of this valuable data
source, and facilitate ease of use for the carbon modeling community. The
Program makes many of the measurements needed by carbon modelers to
simulate terrestrial ecosystems. This workshop will enable the participants
to understand the ARM measurements, carbon measurements at the ARM site,
and new special data products designed for carbon research. In addition to
ARM data streams and carbon measurements (C fluxes, concentrations, and
isotopes), statistically summarized meteorology and radiation data products
from 21 sites in the ARM CART have been prepared for use by carbon
modelers. A set of hourly- and daily-aggregated data products (1996 - 2000
at all ARM Southern Great Plains locations) have been designed for use in
carbon simulations. These data sets were quality checked against instrument
limits, and values were imputed to fill any data gaps so that the data sets
are complete for all parameters and all sites. Participants can also
provide feedback on additional measurements or data products that would be
useful for their own carbon research.
For more detailed information about the workshop, see
http://research.esd.ornl.gov/~hnw/ARMCarbonworkshop/
To register for the workshop, fill out the Registration Form and select
workshop WK-9 at:
https://host21.webserver1010.com/esa/savannah/registration_form.html
The deadline for workshop registration is Monday, July 7, 2003.
Principal Organizer:
Raymond A. McCord
Oak Ridge National Laboratory
Environmental Sciences Division
P.O. Box 2008, M.S. 6407
Oak Ridge, TN 37831-6407
865 574-7827 voice
865-574-4665 fax
mccordra@ornl.gov
-
------------------------------------------------------
Yetta Jager
Environmental Sciences Division
Oak Ridge National Laboratory
P.O. Box 2008, MS 6036
Oak Ridge, TN 37831-6036 USA
For packages, please replace "P.O. Box 2008" with "Bethel Valley Road".
OFFICE: 865/574-8143 FAX: 865/576-3989
Work email: jagerhi@ornl.gov Home email: jagerhi@chartertn.net
WEBpage: http://www.esd.ornl.gov/~zij/
------------------------------
Date: Thu, 5 Jun 2003 14:10:52 -0500
From: Patricia Ott <ottp@MDC.STATE.MO.US>
Subject: INTERPRETIVE PROGRAMS SUPERVISOR
INTERPRETIVE PROGRAMS SUPERVISOR
The Missouri Department of Conservation has a position available for an
Interpretive Programs Supervisor at the St. Louis Regional Office in St.
Charles, Missouri.
SALARY RANGE: Annually $32,424 - $57,576
Beginning salary will be $32,424 to $35,784 depending on
qualifications.
DUTIES AND RESPONSIBILITIES: Assists the Conservation Education
Supervisor on a number of administrative duties and in the development
and coordination of interpretive programs and interpretive activities
for Rockwoods Reservation and Busch Conservation Area; assists in
scheduling people and facilities for interpretive programs at Rockwoods
Reservation and the Busch Conservation Area; assists with purchases and
expenditures within budgeted amounts; projects annual needs and
expenditures; proposes budget changes as needed; compiles monthly
reports on interpretive center program statistics; supervises
Naturalists including training and assigning work responsibilities and
projects at Rockwoods Reservation and Busch Conservation Area; evaluates
program presentations; coordinates two volunteer Naturalist programs;
recruits, interviews, selects and trains new volunteers and supervises
volunteer Naturalists; arranges training sessions including scheduling
guest speakers; prepares training manual and updates as necessary;
assists with Department sponsored events such as "Eagle Days", "Maple
Sugaring", "Kids' Fishing Fair" and "Prairie Days" and represents the
Department at local conservation events; answers questions from the
public on matters relating to natural history, Department functions,
wildlife code interpretation or conservation in general; receives and
responds to inquiries in person, as well as by phone and by mail;
patrols trails to interact with visitors, enforces rules and checks for
safety hazards; plans and assists with interpretive exhibits and
bulletin boards; writes for, edits and assists with the production of
monthly newsletter; promotes the Department and conservation through a
variety of media including TV, radio and newspaper interviews; and
performs other duties as required.
QUALIFICATIONS: Graduation from an accredited college or university
with a Bachelor's Degree in Interpretation, Biology, Fisheries, Wildlife
or Forest Management, Outdoor Recreation or closely related area and two
(2) years experience in interpretation, resource management, nature
center work; or an equivalent combination of education and experience.
Supervisory experience is highly desirable.
National Association of Interpretation (NAI) Certification is
desirable.
CLOSING DATE: June 27, 2003
For an application, contact the Missouri Department of Conservation,
Human Resources Division, 2901 West Truman Blvd., Jefferson City,
Missouri 65102 (573/751 4115). Applications also available on Internet
site at www.mdc.state.mo.us/about/jobs/.
Equal Opportunity Employer
------------------------------
End of ECOLOG-L Digest - 4 Jun 2003 to 5 Jun 2003 (#2003-144)
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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