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 The Mid-Continent Ecology Division of the National Health and
 Environmental Effects
Research Laboratory of the U.S. Environmental Protection Agency is
recruiting for four post-doctoral positions at our laboratory.  These
are term appointments, full-time, not-to-exceed three years.  Our
laboratory is located in Duluth, Minnesota and has over 90 Federal
scientists including ecologists, toxicologists, biologists, and
chemists focusing on research issues in ecotoxicology and freshwater
ecology that will help reduce the scientific uncertainties in
ecological risk assessments and environmental monitoring.  The
position descriptions for the term appointments are attached below.
Instructions on how to apply for these positions are as follows:

 Please send your curriculum vitae (CV), letter of recommendation from
 your senior research
advisor or other comparable official, a letter indicating your
research interest, and the geographical location(s) that you prefer
to: Ms. Karen Dean, ATTN: Post-doctoral Recruitment, US EPA, NHEERL
(MD-85), RTP, NC 27711.  This information should be received no later
than April 30, 1998.  To obtain specific information on the scientific
research projects proposed for all of the NHEERL post-doctoral
positions, you may access the NHEERL Internet site at:
http://www.epa.gov/nheerl/.

                 NHEERL POST DOCTORAL POSITIONS
                        Ecology Research
                       Position No: MED-1

This position is located in Duluth, MN

Description of Position:

The Mid-Continent Ecology Division (MED) is seeking a post-doctoral
candidate to develop a monitoring strategy for amphibian
metapopulations within a defined region.  Recent advances in the field
of metapopulation analysis suggest that spatial patterns in
metapopulations can be used to infer population dynamics.  This
knowledge will be applied to develop a cost-and time-effective
monitoring strategy for amphibian populations under the Environmental
Monitoring and Assessment Program (EMAP).  The monitoring strategy
should be probability-based, and should rely on knowledge of habitat
requirements of selected amphibian populations, coupled with
GIS-derived indicators of suitable habitat. The monitoring strategy
will be tested regionally within watersheds surrounding the western
arm of Lake Superior, and then potentially nationwide at selected EMAP
index sites. Application of a monitoring scheme across the nationwide
network will be designed to test for trends in amphibian populations
in relatively unimpacted sites, and to examine variation in trends in
relation to UV-B exposure levels which will be measured at these
sites.

The preferred candidate will possess a Ph.D. in ecology or aquatic
biology or a closely related fields and expertise in metapopulation
dynamics.  Additional skills desired include a knowledge of amphibian
ecology, population dynamics, physiology,  life-history traits,
habitat requirements, amphibian sampling techniques, and potential
UV-B effects.  The ability to use geographic information systems (GIS)
to define suitable habitats would be helpful; however, on-site GIS
support will be available.

This is a three-year excepted service appointment with a salary range
of $31,897-$60,135, commensurate with qualifications.  The selected
candidate will be eligible for a full benefits package, including
relocation expenses, health insurance, life insurance, retirement,
vacation and sick leave.

To be considered for this position, please send your curriculum vitae
(CV), letter of recommendation from your senior research advisor or
other comparable official, a letter indicating your research interest,
and the geographical location(s) that you prefer to: Ms. Karen Dean,
ATTN: Post-doc Recruitment, US EPA, NHEERL (MD-85), RTP, NC 27711.
This information should be received no later than April 30, 1998.

              EPA is an Equal Opportunity Employer


                 NHEERL POST DOCTORAL POSITIONS
                        Ecology Research
                      Position No :  MED 2

This position is located in Duluth, MN

Description of Position:

The Mid-Continent Ecology Division (MED) is seeking a post-doctoral
candidate to design and conduct studies to evaluate the effects of
ultraviolet (UV) light on aquatic and terrestrial environments.  These
effects include not only the direct effects of UV exposure, but just
as importantly the interaction of UV light with chemical contaminants
and other environmental stressors.  Assessing the environmental risks
posed by these effects requires a thorough understanding of both the
mechanisms by which these effects are produced, and factors that
affect UV dosimetry (e.g., spatial and temporal variations in UV
intensity and spectral qualities, characteristics and biology of the
system/species under consideration).

The preferred candidate will possess a Ph.D. in toxicology or
photobiology and an in-depth understanding of the environmental
significance of ultraviolet light, techniques to collect and interpret
information on UV exposure, and biological mechanisms by which UV
light interacts with living organisms both directly, and indirectly
through chemical activation/modification pathways.  The ability to
conceptualize critical hypotheses, then test these hypotheses in
laboratory and field experiments is critical.  Incumbent should serve
as topical expert on UV, collaborating with other researchers on a
variety of projects involving UV light.

This is a three-year excepted service appointment with a salary range
of $31,897-$60,135, commensurate with qualifications.  The selected
candidate will be eligible for a full benefits package, including
relocation expenses, health insurance, life insurance, retirement,
vacation and sick leave.

To be considered for this position, please send your curriculum vitae
(CV), letter of recommendation from your senior research advisor or
other comparable official, a letter indicating your research interest,
and the geographical location(s) that you prefer to: Ms. Karen Dean,
ATTN: Post-doc Recruitment, US EPA, NHEERL (MD-85), RTP, NC 27711.

This information should be received no later than April 30, 1998.

              EPA is an Equal Opportunity Employer

                 NHEERL POST DOCTORAL POSITIONS
                        Ecology Research
                       Position No: MED-3

This position is located in Duluth, MN

Description of Position:

The Mid-Continent Ecology Division (MED) is seeking a post-doctoral
candidate in the field of landscape ecology with skills in physical
geography, watershed characterization/classification, watershed
diagnostics (linking aquatic community-based indicators of impairment
with anthropogenic stressors related to land-use activities), and
multivariate analysis.  MED is currently conducting a comparative
watershed project focused on the western arm of Lake Superior to
investigate the simple and interactive effects of hydrogeomorphic
region, inland wetland coverage, and forest fragmentation on instream
hydrology, water quality, and aquatic periphyton, macroinvertebrate,
and fish communities.  This project has been designed to test a
conceptual model of watershed sensitivity/resilience and to serve as a
basis for improved watershed classification in ecological risk
assessments.  MED is also supporting Environmental Monitoring and
Assessment Program (EMAP) research and sampling throughout the
Northern Lakes and Forests (NLF) Ecoregion (which includes the western
arm of Lake Superior) via a Regional EMAP project coordinated by EPA
Region V.  This position would support extrapolation of our conceptual
models of watershed vulnerability and improved watershed
classification techniques to the larger NLF ecoregion.

The preferred candidate will possess a Ph.D. in ecology or aquatic
biology, or a closely related field and be experienced in geographical
information system (GIS) analysis, particularly Arc/Info, and remote
sensing techniques for landscape characterization.

This is a three-year excepted service appointment with a salary range
of $31,897-$60,135, commensurate with qualifications.  The selected
candidate will be eligible for a full benefits package, including
relocation expenses, health insurance, life insurance, retirement,
vacation and sick leave.

To be considered for this position, please send your curriculum vitae
(CV), letter of recommendation from your senior research advisor or
other comparable official, a letter indicating your research interest,
and the geographical location(s) that you prefer to: Ms. Karen Dean,
ATTN: Post-doc Recruitment, US EPA, NHEERL (MD-85), RTP, NC 27711.
This information should be received no later than April 30, 1998.

              EPA is an Equal Opportunity Employer

                 NHEERL POST DOCTORAL POSITIONS
                        Ecology Research
                       Position No: MED-4

This position is located in Duluth, MN

Description of Position:

The Mid-Continent Ecology Division (MED) is seeking a post-doctoral
candidate with expertise in spatially explicit population modelling to
develop models of fish populations applicable to issues surrounding
the combined effects of spatially heterogeneous chemical and
non-chemical stressors.  These models will then be applied to specific
questions, such as effects of localized sediment contamination (i.e.
hot spots) or translocation (e.g. dredging, hydrologic events),
patterns and variability in contaminant body burdens, degradation of
food resources (e.g. benthic invertebrates), and influence of habitat
alteration and fragmentation on mobile fish populations and
communities.  This research will support ongoing efforts in the
assessment and management of contaminated sediments and increase the
understanding of non-chemical effects of human-induced stresses on
natural systems.

The preferred candidate will possess a Ph.D. in ecology aquatic
biology or fisheries biology, or a closely related field.  Relevant
skills and interests include aquatic ecology and toxicology, spatially
explicit population and community modelling, and spatial data
analyses.  Depending on the candidate's interests, involvement in
laboratory or field research related to the modelling efforts is
possible.

This is a three-year excepted service appointment with a salary range
of $31,897-$60,135, commensurate with qualifications.  The selected
candidate will be eligible for a full benefits package, including
relocation expenses, health insurance, life insurance, retirement,
vacation and sick leave.

To be considered for this position, please send your curriculum vitae
(CV), letter of recommendation from your senior research advisor or
other comparable official, a letter indicating your research interest,
and the geographical location(s) that you prefer to: Ms. Karen Dean,
ATTN: Post-doc Recruitment, US EPA, NHEERL (MD-85), RTP, NC 27711.

This information should be received no later than April 30, 1998.

               EPA is an Equal Opportunity Employer