Subject: ECOLOG-L Digest - 29 Jan 2001 to 30 Jan 2001
To: Recipients of ECOLOG-L digests <ECOLOG-L@UMDD.UMD.EDU>
Status: R
There are 17 messages totalling 763 lines in this issue.
Topics of the day:
1. job: limnology lab tech
2. Fire Ecology Field Assistant Opportunity in the Florida Keys
3. graduate student assistantships
4. TenureTrack-Marine Biology
5. Stats question about technician bias (4)
6. FullProfessor-DirectorEnvSci
7. botanical help (2)
8. Ecological Symposium
9. FW: Stats question about technician bias
10. Job Announcement (2)
11. A Summer Program of Independent Research in Ecology for Undergrad uates
12. Cerulean Warbler Study
----------------------------------------------------------------------
Date: Mon, 29 Jan 2001 18:44:45 -0600
From: Amy E Galford <galf0001@TC.UMN.EDU>
Subject: job: limnology lab tech
Please reply to stern007@tc.umn.edu
------------------------------------------------------------------
POSITION ANNOUNCEMENT
BIOLOGICAL LIMNOLOGY TECHNICIAN
UNIVERSITY OF MINNESOTA
LABORATORY OF DR. ROBERT STERNER
Description: I am seeking an individual for a full-time position in my
aquatic ecology laboratory in St. Paul, MN. This is an opportunity to
join an active and well-supported laboratory by contributing to data
collection and data management in the laboratory and in the field.
Qualifications: I am looking for an individual with an undergraduate
degree in limnology or related discipline, and with some experience in the
identification of zooplankton, algae, or both. Ability to work as a team
member is very important. Ability to perform disciplined laboratory
procedures and keep good records is essential. Ability to perform
physically demanding fieldwork occasionally is essential. Some
spreadsheet experience is essential. Some formal training in algal or
invertebrate taxonomy is desired, and continued advanced training will be
encouraged. Knowledge of microbiological clean technique is desired.
Database experience is a plus. Familiarity with good microscope technique
is desired.
Duties of the selected individual will be:
Culture of algae and zooplankton (making of medium, monitoring of
cultures, transfers of zooplankton, operation of microbalance) (30%)
Microscopic enumeration of phytoplankton and zooplankton. (30%)
Perform laboratory growth experiments on algae and zooplankton in
the laboratory (30%)
Field sampling (5%)
Data management (5%)
Availability The position will be filled as soon as possible. Funding is
in place for at least two years.
Salary and Benefits: the salary range for this position (listed in the
Senior Laboratory Technician class) is $10.15 - $15.66 per hour.
Starting salary will be depending on applicants qualifications. Benefits
include retirement, health insurance, and vacation and sick leave. This
position is covered by the Fair Labor Standards Act.
To apply Send a letter of interest, a resume, academic transcripts, and
names of two or three references to:
Dr. Robert W. Sterner
Ecology, Evolution and Behavior
University of Minnesota
100 Ecology; 1987 Upper Buford Circle
St. Paul, MN 55108
For more information Please see my lab's web site at
http://sterner.cbs.umn.edu
The University of Minnesota is an equal opportunity
educator and empoyer.
------------------------------
Date: Tue, 30 Jan 2001 15:04:25 -0000
From: Chris Borg <ckborg@HOTMAIL.COM>
Subject: Fire Ecology Field Assistant Opportunity in the Florida Keys
<html><DIV>
<P><U>PLEASE POST IN YOUR DEPARTMENTS</U></P>
<P>Florida Keys Fire Ecology Field Assistants:</P>
<P>The Lower Florida Keys is a dynamic and diverse ecosystem composed
f coral
reef, mangrove forest, subtropical hardwood hammock, and fire dependent pin
rockland. Pine rockland is a globally endangered subtropical community
harboring many rare and endemic plant and animal species. In 1997 a multiag
ncy
initiative was undertaken to better understand the seasonal role of fire in
this system. Currently we are seeking two field assistants for an eight-mon
h
term (ca. May - December 2001). Housing and a stipend of $250.00 biweekly w
ll
be provided. Successful applicants will be responsible for assisting the
project manager collect and enter data pertaining to the diversity, abundan
e,
biomass, and phenology of herbs and shrubs. Additional responsibilities wil
include monitoring Florida Key Deer herbivory, collecting and maintaining
herbarium specimens, and assisting our prescribed burn crew. Desired
qualifications include demonstrating a strong interest in plant ecology and
taxonomy, high tolerance of hot, hum
id, and sometimes "buggy" conditions, and strong academic credentials. Junio
s
and seniors and recent graduates are encouraged to apply. Send letter of
interest, resume, one letter of recommendation, and contact information for
two
additional references <U>postmarked by</U> <U>March 10<
/U> to:</P>
<P>-Mr. Chris K. Borg; Project Manager; Florida Internatio
al
University / Southeast Environmental Research Center; Lower Keys Fiel
Station; Post Office Box 432032; Big Pine Key, Florida
33043</P></DIV><br clear=all><hr>Get your FREE down
oad of MSN Explorer at <a
href="http://explorer.msn.com">http://explorer.msn.com</a><br>
</p></html>
------------------------------
Date: Tue, 30 Jan 2001 11:45:10 -0600
From: "Matthew J. Parris" <mparris@MEMPHIS.EDU>
Subject: graduate student assistantships
PhD and MS Assistantships
EVOLUTIONARY ECOLOGY OF AMPHIBIANS
Applications are being sought for students interested in pursuing an
academic career in the evolutionary ecology of amphibians in the laboratory
of Matthew Parris in the Department of Biology at the University of Memphis.
Research in my lab focuses on the evolutionary ecology of species
interactions, organismal hybridization, and the impact of diseases on
amphibian population ecology. Please see
www.people.memphis.edu/~biology/parris.html for details.
The Department of Biology offers a strong environment for evolutionary
ecology training. Students will benefit from interactions with other
faculty interested in evolutionary questions: William Gutzke
(herpetological ecological physiology), Jerry Wolff (mammalian population
and behavioral ecology), Michael Ferkin (animal behavior), and Stephan
Schoech (avian behavioral endocrinology).
The University of Memphis is committed to excellence in graduate training.
PhD stipends are $14,500 / 11 months and MS stipends $9,000 / 8 months, with
tuition expenses waived for both. GRE (verbal and quantitative) scores of
1100 for PhD and 1000 for MS, and Advanced Biology Test score in the 50th
percentile (PhD only) are minimum requirements.
Please also see the Department of Biology (www.people.memphis.edu/~biology)
and University of Memphis (www.memphis.edu) web sites for more information.
Matthew J. Parris
Assistant Professor
Department of Biology
University of Memphis
Memphis, TN 38152
phone: (901) 678-4408
fax: (901) 678-4746
email: mparris@memphis.edu
web: www.people.memphis.edu/~biology/parris.html
------------------------------
Date: Tue, 30 Jan 2001 13:04:21 -0500
From: Marguerite Koch <mkoch@FAU.EDU>
Subject: TenureTrack-Marine Biology
TENURE-TRACK ASSOCIATE/ASSISTANT
FACULTY POSITION IN MARINE BIOLOGY
The Department of Biological Sciences at Florida Atlantic University seeks
applicants for a tenure-track Associate or Assistant Professor in Marine
Biology. The specific area of research is open, but priority will be given
to candidates with a background in developmental biology, physiology,
immunology, evolutionary biology, population genetics, or ecology. The
candidate will be expected to incorporate modern research techniques that
could build bridges between the Department's current strengths in ecology,
physiology, animal behavior, and molecular biology, and be able to take
advantage of local coral reef environments. The applicant should expect to
advise graduate students and to support a research program through external
funding. The selection committee will emphasize publications,
post-doctoral training, teaching experience, and the ability to acquire
grant funding. Please submit a curriculum vitae, statement of research and
teaching interests, reprints, and a list of three referees to:
Dr.Marguerite Koch, Search Committee Co-Chair, Department of Biological
Sciences, Florida Atlantic University, 777 Glades Rd, Boca Raton,
FL33431-0991. Application Deadline February 28, 2001.
Florida Atlantic University is an Equal Opportunity/Affirmative Action
Employer.
Marguerite S. Koch-Rose, Ph.D.
Aquatic Plant Ecology Laboratory
Biological Sciences Department
Florida Atlantic University
777 Glades Road
Boca Raton, FL 33431
Phone:(561)297-3325
Fax: (561) 297-2749
<mkoch@fau.edu>
------------------------------
Date: Tue, 30 Jan 2001 11:04:24 -0700
From: "Aaron R. Ellingson" <are@LAMAR.COLOSTATE.EDU>
Subject: Re: Stats question about technician bias
At 02:55 PM 1/29/01 -0500, you wrote:
>Ecologgers,
>Suppose you are conducting a long-term experiment which is long enough t
>require multiple technicians to succeed one another in data collection.
s
>there a way to determine the error introduced by technician bias? If so,
>can long-term data be corrected for this error so that the true treatmen
>effect can be more accurately observed?
>Thanks for any input.
Brandon,
Bias is technically defined as the difference between the the expected
("average") value of an estimator and the "true" value of the parameter
being estimated. Since the "true" value is unknown, objectively estimating
or correcting for bias will not be possible (although that would not stop
most from the SWAG approach).
Forgive me if I assume too much about your project: As a part of a
monitoring program, you are likely estimating abundance in some form
(possibly density). Perhaps you are acutally using an index to abundance
(e.g., raw counts) and thus are concerned that different observers detected
different proportions of the population. This a very real problem that
anyone using indices will run into. Thus, the quantities of interest (that
are way too often ignored) are the detection probabilities. You are
concerned that they differ among observers. One should also question how
they vary by time of day, habitat, weather, etc. There are a number of
ways to estimate detection probability depending on the field methods you
wish to employ. Distance sampling works well for line and point transect
sample. There are also some recently developed double-observer methods.
The catch is, such methods must be incorporated into the design of your
surveys. Post hoc analyses will be SWAG at best.
The lesson here is that long-term data, if collected without sufficient
forethought and sound design, do not provide relevant information. Large
samples or long-term observations, while expensive and difficult to obtain,
do nothing to guarantee the data are valuable.
I don't mean to rant, but this has been (still is) a very hard lesson for
ecologists to learn.
Best of luck,
Aaron Ellingson
------------------------------
Date: Tue, 30 Jan 2001 13:11:11 -0500
From: Marguerite Koch <mkoch@FAU.EDU>
Subject: FullProfessor-DirectorEnvSci
DIRECTOR OF ENVIRONMENTAL SCIENCE PROGRAM
FLORIDA ATLANTIC UNIVERSITY
The position of Director of Environmental Sciences, with appointment as
associate or full professor in the Department of Biological sciences, is
available at Florida Atlantic University. The specific area of expertise
is open, but preference will be given to candidates in ecology,
conservation biology and/or resource management. The candidate should have
an exemplary publication record, evidence of sustained research funding,
and a strong commitment to graduate research and education. Environmental
Sciences degree programs include a B.A. with an Environmental Emphasis, a
Bachelor's degree with an Environmental Certificate, and a graduate program
offering Master of Science tracks in Coastal/Wetland/Marine and Tropical
Terrestrial Ecology. As director, the individual will be expected to
promote the continued development of the intellectual and financial base of
the program. Further detail on the program can be obtained at:
http://www.fau.edu/divdept/science/envsci/environm.htm. The closing date
for applications is February 28, 2001. The position can start as soon as
September 1 2001. Applicants should submit a current curriculum vitae, an
outline of future research interests, and names of three references to: Dr.
Peter Lutz, Environmental Science Search Committee, Department of
Biological Sciences and, 777 Glades Road, P.O. Box 3091, Florida Atlantic
University, Boca Raton, Fl 33431. Florida Atlantic University is an Equal
Opportunity/Access/Affirmative Action Institution.
Marguerite S. Koch-Rose, Ph.D.
Aquatic Plant Ecology Laboratory
Biological Sciences Department
Florida Atlantic University
777 Glades Road
Boca Raton, FL 33431
Phone:(561)297-3325
Fax: (561) 297-2749
<mkoch@fau.edu>
------------------------------
Date: Tue, 30 Jan 2001 13:29:44 -0600
From: "D. Liane Cochran-Stafira" <cochran@SXU.EDU>
Subject: botanical help
Hi all,
Can anyone tell me if Euphorbia milii, commonly known as "crown of thorns
plant" is a C4 plant? My information says most members of the family are,
but I don't know for sure about this one.
Thanks much,
Liane
***************************
Liane Cochran-Stafira, Ph.D.
Department of Biology
Saint Xavier University
3700 West 103rd Street
Chicago, Illinois 60655
phone: 773-298-3514
fax: 773-779-9061
email: cochran@sxu.edu
------------------------------
Date: Tue, 30 Jan 2001 13:23:15 -0600
From: Gage Dayton <gdayton@TAMU.EDU>
Subject: Ecological Symposium
The Second Annual Integration across Ecological Scales Symposium
entitled: "Complexity, Biodiversity, and Ecosystem Function" will be
held at Texas A&M University March 24, 2001. The event will be a
one-day symposium with seminars from distinguished ecologists, Lenore
Fahrig, J.P. Grime, Dan Janzen, Jim Kitchell, Ariel Lugo, Judy Meyer,
Bruce Milne, and Dan Simberloff. The aim of the symposium is to
encourage integration across diverse fields of ecology, and to provide
insight into the complex relationship between biodiversity and ecosystem
function across multiple scales. Admission is free and all are welcome
to attend. If you are interested in attending please visit our web site
(http://wfscnet.tamu.edu/int/integration.htm) and register online.
------------------------------
Date: Tue, 30 Jan 2001 11:29:17 -0800
From: "Eric B. Peterson" <peterson@GOVMAIL.STATE.NV.US>
Subject: Re: Stats question about technician bias
Here is a citation for a study that might be of interest. It looked at
observer bias in large area (0.38 ha) community plots, and its influence on
multivariate results.
McCune, B/ Dey, JP/ Peck, JE/ Cassell, D/ Heiman, K/ Will-Wolf, S/ Neitlich,
PN
1997: Repeatability of community data: species richness versus gradient scor
s
in large-scale lichen studies. - The Bryologist 100(1): 40-46.
"Aaron R. Ellingson" wrote:
> At 02:55 PM 1/29/01 -0500, you wrote:
> >Ecologgers,
> >Suppose you are conducting a long-term experiment which is long eno
gh to
> >require multiple technicians to succeed one another in data collect
on. Is
> >there a way to determine the error introduced by technician bias? I
so,
> >can long-term data be corrected for this error so that the true tre
tment
> >effect can be more accurately observed?
> >Thanks for any input.
>
> Brandon,
>
> Bias is technically defined as the difference between the the expected
> ("average") value of an estimator and the "true" value of the parameter
> being estimated. Since the "true" value is unknown, objectively estima
ing
> or correcting for bias will not be possible (although that would not st
p
> most from the SWAG approach).
>
> Forgive me if I assume too much about your project: As a part of a
> monitoring program, you are likely estimating abundance in some form
> (possibly density). Perhaps you are acutally using an index to abundan
e
> (e.g., raw counts) and thus are concerned that different observers dete
ted
> different proportions of the population. This a very real problem that
> anyone using indices will run into. Thus, the quantities of interest (
hat
> are way too often ignored) are the detection probabilities. You are
> concerned that they differ among observers. One should also question h
w
> they vary by time of day, habitat, weather, etc. There are a number of
> ways to estimate detection probability depending on the field methods y
u
> wish to employ. Distance sampling works well for line and point transe
t
> sample. There are also some recently developed double-observer methods
> The catch is, such methods must be incorporated into the design of your
> surveys. Post hoc analyses will be SWAG at best.
>
> The lesson here is that long-term data, if collected without sufficient
> forethought and sound design, do not provide relevant information. Lar
e
> samples or long-term observations, while expensive and difficult to obt
in,
> do nothing to guarantee the data are valuable.
>
> I don't mean to rant, but this has been (still is) a very hard lesson f
r
> ecologists to learn.
>
> Best of luck,
>
> Aaron Ellingson
--
Eric Peterson
Plant Ecologist
Nevada Natural Heritage Program
1550 E. College Pkwy Suite 145
Carson City, NV 89706-7921
(775) 687-4245
http://www.state.nv.us/nvnhp/
------------------------------
Date: Tue, 30 Jan 2001 12:16:24 -0800
From: Michael Loik <mloik@CATS.UCSC.EDU>
Subject: Re: botanical help
Liane,
I do not know specifically about E. milii, but the Family Euphorbiaceae is
one of the few families (and perhaps the only one) with C3, C4, and CAM
members. I would be cautious about generalizations about photosynthetic
pathways with this Family.
Best regards,
Michael Loik
********************************************
Dr. Michael E. Loik
Department of Environmental Studies
University of California
Santa Cruz, CA 95064
voice 831-459-5785
fax 831 459-4015
www2.ucsc.edu/~mloik
********************************************
------------------------------
Date: Tue, 30 Jan 2001 14:58:54 -0700
From: "Aaron R. Ellingson" <are@LAMAR.COLOSTATE.EDU>
Subject: Re: FW: Stats question about technician bias
In response to several off-list inquiries regarding observer bias in
monitoring:
Good references for line or point transect methods include:
Buckland, ST, DR Anderson, KP Burnham, and JL Laake. 1993. Distance
Sampling, Estimating Abundance of Biological Populations. Chapman Hall,
New York. 446pp.
(revised edition due in 2001)
Nichols, JD et al. 2000. A double-ovserver approach for estimating
detection probabilities and abundance from point counts. The Auk 117:393-40
.
For a good explanation of the problem with inidices see:
Conroy, MJ. 1996. Abuncance indices. In Measuring and Monitoring Biological
Diversity, Standard Methods for Mammals. (DE Wilson et al., eds.)
Smithsonian Institution Press, Washington.
... and SWAG = "Scientific" Wild-A** Guess
Cheers,
aaron
------------------------------
Date: Tue, 30 Jan 2001 11:55:39 -0800
From: jan.cyrus@ORST.EDU
Subject: Job Announcement
Please post: Closing date - April 13, 2001
DEPARTMENT HEAD, Oregon State University: The Department of Fisheries & Wild
ife
encompasses expertise in fisheries science, wildlife science, conservation
biology, and natural resources ecology and management. The Department Head
ill
be appointed to a 12-month, 1.0 FTE position with indefinite tenure at the r
nk
of Professor. Responsibilities include: Provide overall administrative
leadership for a multi-faceted department with programs in undergraduate and
graduate education, basic and applied research, extended education, and
Extension; Engender an atmosphere of academic freedom, independence of thou
ht
and regard for the value of faculty, staff, and students; and demonstrate
scholarship in a field of fisheries science, wildlife science, natural resou
ce
ecology and management, or conservation biology. Applicants are required to
have: a doctorate in fisheries or wildlife science, ecology, conservation
biology, or a related field; experience commensurate with faculty status as
Professor and a proven track record in obtaining grants, research publicatio
,
teaching, and public outreach; a national/international reputation in fisher
es
or wildlife science, conservation biology, or natural resource ecology and
management; evidence of program leadership and administrative ability;
demonstrated commitment to fostering diversity and affirmative action; and,
excellent interpersonal communication skills. It is desirable that applican
s
have: administrative experience in academic institutions; experience in
teaching, innovative learning approaches, and curriculum development; knowle
ge
and experience with Extension programs and commitment to improving public
education on natural resource issues; and proven capabilities in research an
outreach to state and federal agencies. Applications must consist of:
curriculum vita that includes a complete list of scholarly and administrativ
activities; three letters of reference (received by April 13, 2001); a state
ent
of interest indicating how this position relates to your long-term goals and
leadership philosophy and how your experience qualifies you for this positio
.
Please submit applications, nominations, or inquiries to: Dr. Stan Gregory,
Co-chair, Fisheries & Wildlife Search Committee, Department of Fisheries &
Wildlife, 104 Nash Hall, Oregon State University, Corvallis, OR 97331-3803.
Phone: (541)737-1951, FAX: (541)737-3590, E-mail: Stanley.Gregory@orst.edu.
Inquiries (but not applications) also can be submitted to: Dr. Bill Boggess,
Co-chair, Fisheries & Wildlife Search Committee, Department of Agricultural
nd
Resource Economics, Ballard Extension Hall 213, Oregon State University,
Corvallis, OR 97331-3601. Phone: (541)737-1395, FAX: (541)737-1441, E-mail:
Bill.Boggess@orst.edu. Oregon State University is an AA/EO Employer and h
s a
policy of being responsive to the needs of dual-career couples.
------------------------------
Date: Tue, 30 Jan 2001 12:49:00 -0700
From: John Meakin <johnm@BITTERROOTRESTORATION.COM>
Subject: Job Announcement
Job Description
Hydrologist/Hydrogeologist
January, 2001
Bitterroot Restoration, Inc. is seeking applicants for the position of
Hydrologist/ Hydrogeologist. This position will begin about April 1, 2001
and will be based in our Auburn, CA office. The successful applicant will
be responsible for providing consulting services in the field of hydrology,
including bioengineering, hydraulic engineering, stream stabilization,
project construction, water quality, channel assessment and/or sediment
transport analysis. The successful applicant will also be involved in
developing and maintaining new and established client relationships;
generating sales of BRI products and services; preparing bid documents,
writing proposals; marketing BRI's comprehensive ecological restoration
services, and participating in trade shows or conferences.
A Master's degree in hydrology/hydrogeology/fluvial geomorphology is
required. The successful applicant must be licensed (or must be capable of
immediately becoming licensed) as a hydrogeologist with the State of
California.
For a complete job description and application instructions as well as
additional information about Bitterroot Restoration, Inc., please visit our
web site: <www.bitterrootrestoration.com>
------------------------------
Date: Tue, 30 Jan 2001 16:39:40 -0500
From: Heather Dahl <DahlH@ECOSTUDIES.ORG>
Subject: A Summer Program of Independent Research in Ecology for Undergrad u
tes
A Summer Program of Independent Research in Ecology for Undergraduates
at the Institute of Ecosystem Studies, Millbrook, New York
www.ecostudies.org
Experience the entire research process, from problem formulation to =
final
report. Students carry out independent research projects of their own =
design
under the guidance of a mentor scientist.=20
Discover these important aspects of scientific inquiry: =95science is =
a
community activity; =95 there are many ways to address scientific =
problems; =95
all research has a theoretical context; and =95 all research has a =
societal
context. Three programs supplement the research experience during the
summer: (1) a series of workshops on research methods, (2) seminars,
discussions and case studies focusing on the various contexts of =
science,
and (3) a forum on career opportunities in ecology.
The twelve-week program begins May 29 and runs through August 20, 2001. =
Each
student makes an oral presentation at the Undergraduate Research =
Symposium
and submits a final paper for inclusion in an Institute Occasional
Publication.
Projects offered for 2001:=20
=B7 Microbial processes in urban ecosystems. Dr. Peter M.
Groffman.
=B7 White-footed mice, tree seeds, ectoparasites, and community
dynamics in oak forests. Drs. Felicia Keesing and Richard S. Ostfeld.
=B7 Segregation of tree species along soil nutrient gradients.
Dr. Seth Bigelow.
=B7 Spatial analysis of forest edges in Metropolitan Baltimore.
Drs. M.L. Cadenasso and S.T.A. Pickett.
=B7 Effects of air pollutants on the forests of the Catskill
Mountains. Drs. Ross D. Fitzhugh and Gary M. Lovett
=B7 Modeling oak forest ecosystem dynamics. Drs. James H.
McCutchan and Gene E. Likens.
=B7 Effects of forests age on food resources in streams. Dr.
Stuart E.G. Findlay.
=B7 Groundwater ecology. Dr. Stuart E.G. Findlay.
=B7 Ecological functions of Hudson River marshes. Dr. Alan R.
Berkowitz and Ms. Joan Doyle.
=B7 Patch analysis of schoolyard ecosystems and surrounding
neighborhoods. Drs. Brett Goodwin, Eric Schauber, Clive G. Jones and =
Richard
S. Ostfeld.
=95 Isoprene from plants and atmospheric chemistry. Drs. Clive
G. Jones and Manuel T. Lerdau.
=95 Physical and biogeochemical controls over nitrogen oxide gas
emissions from temperate forest soils. Drs. Rodney V. Venterea and =
Peter M.
Groffman.
Stipend:
Undergraduate freshmen, sophomores, juniors or first semester seniors, =
are
eligible to apply. Applicants must be citizens or permanent residents =
of the
U.S. or its possessions. Participants receive a $3000 stipend for the
twelve- week program, and receive housing in an Institute dormitory at =
a
discounted rate of $250 for the summer. Some assistance is available =
for
travel to and from the program.
For more information and to apply (applications must be postmarked by =
15
February 2001):
Look at our website at =20
or contact:
Heather Dahl
Undergraduate Research Program
Institute of Ecosystem Studies=20
P.O. Box R, Millbrook, NY 12545=20
(845) 677-9150 Fax: (845) 677-6455
E-mail:dahlh@ecostudies.org=20
About the Institute of Ecosystem Studies:
The Institute of Ecosystem Studies is a highly interactive,
research-oriented environment with a staff of 100. Students will =
exchange
ideas with each other, staff scientists and educators, and visitors and
speakers working in public policy and academics. The Institute occupies =
the
800 hectare Mary Flagler Cary Arboretum, approximately 117 km north of =
New
York City, in rural Dutchess County, N.Y. The modern laboratory and
greenhouse facilities, library, computers and other resources of the
Institute are available to program participants.
------------------------------
Date: Tue, 30 Jan 2001 20:00:59 EST
From: Aneyww@AOL.COM
Subject: Re: Stats question about technician bias
In a message dated 30-Jan-2001 10:49:24 Pacific Standard Time,
are@LAMAR.COLOSTATE.EDU writes:
<< Since the "true" value is unknown, objectively estimating
or correcting for bias will not be possible (although that would not stop
most from the SWAG approach). >>
Well, so much for the extensive work that has been done on estimating bias
correction factors.
Warren
------------------------------
Date: Tue, 30 Jan 2001 18:17:18 -0700
From: "Aaron R. Ellingson" <are@LAMAR.COLOSTATE.EDU>
Subject: Re: Stats question about technician bias
>Well, so much for the extensive work that has been done on estimating bi
s
>correction factors.
>
>Warren
>
Warren,
Your point is well taken and perhaps I need to clarify. In some sense we
are hindered by not being able to talk about specifics (the original post
did not say much about what the data were). Perhaps this will help.
"Bias-correction" factors are calculated assuming the the "true" model is
known. They are valid and useful (e.g. small-sample size corrections) when
you have faith in the model. However, what model will you use to correct
for observer bias??? I suggest that the "true" model (e.g., of detection
probablitity as a funciton of observer) is unknown and therefore any
correction for observer bias will be a guess. The best(?) option is to try
to find an appropriate model, but this will require more data than simply
the response measured by each observer (e.g., distance sampling or
double-observer methods).
Your comments are welcome.
Respectfully,
aaron
At 08:00 PM 1/30/01 EST, you wrote:
>In a message dated 30-Jan-2001 10:49:24 Pacific Standard Time,
>are@LAMAR.COLOSTATE.EDU writes:
>
><< Since the "true" value is unknown, objectively estimating
> or correcting for bias will not be possible (although that would not st
p
> most from the SWAG approach). >>
>
>Well, so much for the extensive work that has been done on estimating bi
s
>correction factors.
>
>Warren
>
------------------------------
Date: Tue, 30 Jan 2001 23:52:00 -0500
From: Jody Simoes <sim_cnh320@HOTMAIL.COM>
Subject: Cerulean Warbler Study
<html><DIV>
<DIV></DIV>
<P>I'm working for a private Nature Center in SW Michigan which h
s been
collecting baseline data on nesting Cerulean Warblers for many years.
I'm
looking to incorporate my recreational tree climbing skills to collect Ceru
ean
data from a different vantage point!</P>
<P>Looking to collect pertinent breeding biology data for the 2001 sea
on.
In addition to locating as many nests as possible to determine range size,
density, etc, I'm hoping getting aloft will allow me to document;
predation, brood parasitism, nest structure, nest placement/site selection,
microclimate, cover, existence of nonbreeding nests, colonialism?, nes
ing
behavior including responses to predators, brooding rhythm, growth studies
f
nestlings.......</P>
<P>Any other ideas, suggestions, priorities, recommendations for furth
r
reading or contacts would be greatly appreciated!</P>
<P>Thanks in advance,</P>
<P>J. Simoes</P></DIV><br clear=all><hr>Get yo
r FREE download of MSN Explorer
at <a href="http://explorer.msn.com">http://explorer.msn.com</a>
<br></p></html>
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End of ECOLOG-L Digest - 29 Jan 2001 to 30 Jan 2001
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ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
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