National Biological Service 



Technical Report Series 



This report is the last item to be published in the National Biological Service's Biological Report series. Future reports 

 of this nature will be published in one of the series listed below. Questions regarding these series should be mailed 

 electronically to pubsjirogram@nbs.gov. 



Biological Science Reports 



ISSN1081-292X 



Papers published in this series record the significant find- 

 ings resulting from USGS/NBS-sponsored and cospon- 

 sored research programs. They may include extensive data 

 or theoretical analyses. These papers are the in-house coun- 

 terpart to peer-reviewed journal articles, but with less strin- 

 gent restrictions on length, tables, or raw data, for example. 

 We encourage authors to publish their findings in the most 

 appropriate journal possible. However, the Biological Sci- 

 ence Reports represent an outlet in which BRD authors 

 may publish papers that are difficult to publish elsewhere 

 due to the formatting and length restrictions of journals. 

 At the same time, papers in this series are held to the same 

 peer-review and high quality standards as their journal 

 counterparts. 



Information and 

 Technology Reports 



ISSN 1081-2911 



These reports are intended for the publication of book- 

 length-monographs; synthesis documents; compilations 

 of conference and workshop papers; important planning 

 and reference materials such as strategic plans, standard 

 operating procedures, protocols, handbooks, and manu- 

 als; and data compilations such as tables and bibliogra- 

 phies. Papers in this series are held to the same peer-review 

 and high quality standards as their journal counterparts. 



Funding for printing this report was provided by the NBS National Wetlands Research Center. Lafayette, LA. 

 Production was also by the NBS National Wetlands Research Center. Lafayette, LA (see inside back cover). 



To purchase this report, contact the National Technical Information Service, 5285 Port Royal Road. Springfield. 

 VA 22161 (call toll free 1-800-553-6847). or the Defense Technical Information Center, 8725 Kingman Rd.. 

 Suite 0944. Fort Belvoir. VA 22060-62 1 8. 



