Orlando Sarnelle
NCEAS post-doctoral fellow
May 1996- April 1997
Report date: March 20, 1998

I split my time between NCEAS (50%) and UCSB (Assistant Research Biologist, Marine Science Institute and Department of Ecology, Evolution and Marine Biology) during my 11-month tenure.  While at NCEAS, I was co-organizer of the working group:"Meta-analysis, interaction strength and effect size: application of biological models to the synthesis of experimental data."  As co-organizer, I helped prepare the initial proposal and coordinate three workshops at NCEAS, which took place during July, 1996, January 1997 and May 1997.  At these workshops, meta-analysis in ecology was discussed and often argued over.  The general consensus of the working group was that meta-analysis is a critical synthetic tool for building quantitative generalizations that needs to be specifically tailored when applied to ecological questions.  In addition to discussion of conceptual issues, data was extracted and analyzed and manuscripts were prepared during these workshops.  As a direct result of these workshops, the following set of manuscripts was submitted as a Special Feature to the journal Ecology in the fall of 1997:

Osenberg, C. W., O. Sarnelle, S. D. Cooper and R. D. Holt.  Resolving ecological questions through meta-analysis: goals, metrics and models.

Englund, G., O. Sarnelle, and S. D. Cooper.  Importance of data selection criteria: meta-analyses of stream predation experiments.

Downing, J. A., C. W. Osenberg, and O. Sarnelle.  Meta-analysis of marine nutrient-enrichment experiments: systematic variation in the magnitude of nutrient limitation.

Goldberg, D. E., T. Rajaniemi, J. Gurevitch, and A. Stewart-Oaten.  Matching questions and metrics of interaction strength in community ecology.
Gurevitch, J. and L. V. Hedges.  Statistical issues in conducting ecological meta-analyses.

Hedges, L. V., J. Gurevitch, and P. Curtis.  The meta-analysis of response ratios in experimental ecology.

Petraitis, P., A. E. Dunham, and P. Curtis.  Meta-analysis: non-independence and limits to inference.

I was directly involved in the preparation of four of these manuscripts and helped to edit all of them.

In addition to my role as a member and co-organizer of the Meta-Analysis Working Group, I also analyzed data and prepared manuscripts while at NCEAS that resulted in the following publications and submissions:

Sarnelle, O., S. D. Cooper, S. Wiseman and K. Mavuti.  in press.  Relationships between nutrients and trophic-level biomass in turbid tropical ponds.  Freshwater Biology.

Bradford, D. F., S. D. Cooper, T. M. Jenkins, A. D. Brown, K. Kratz and O. Sarnelle.  in press.  Influences of natural acidity and introduced fishes on amphibian, macroinvertebrate, and zooplankton species assemblages in the Sierra Nevada, California.  Canadian Journal of Fisheries and Aquatic Sciences.

Cooper, S. D., S. Diehl, K. Kratz and O. Sarnelle.  1998.  Implications of scale for patterns and processes in freshwater ecology.  Australian Journal of Ecology 23:27-40.

Osenberg, C. W., O. Sarnelle and S. D. Cooper.  1997.  Effect size in ecological experiments: the application of biological models in meta-analysis.  American Naturalist 150:798-812.

Sarnelle, O.  1997.  Daphnia effects on microzooplankton: comparison of enclosure and whole-lake responses.  Ecology 78:913-928.

Cooper, S. D., L. Barmuta, O. Sarnelle, K. Kratz and S. Diehl.  1997.  Quantifying spatial heterogeneity in streams.  Journal of the North American Benthological Society 16:174-188.

Sarnelle, O.  Zooplankton effects on vertical particulate flux: testable models and experimental results. (submitted to Limnology and Oceanography).

While at NCEAS, I was able to meet and interact with a diverse set of visiting ecologists and resident postdoctoral fellows.  Consequently, my time at NCEAS was an exceptionally rewarding experience which will continue to generate benefits in my future career.  I give the staff at NCEAS high marks for their courtesy, efficiency and friendliness.

Orlando Sarnelle
Assistant Professor
Department of Fisheries and Wildlife
Michigan State University
East Lansing, MI  48824