REU:  Animal Influences on the Aquatic Landscape: Vegetative Patterns, Successional Transitions, and Nutrient Dynamics
{'Code': '08010208', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'DEB', 'LongName': 'Division Of Environmental Biology'}}
{'SignBlockName': 'Richard F. Dame', 'PO_EMAI': None, 'PO_PHON': None}
This proposal addresses the effect of hydrologic                           modifications by beaver on vegetative patterns, successional                    transitions, and the distribution of nutrients on the aquatic                   portion of the boreal forest landscape.  The research is oriented                                                                                               around three related predictions (1) The physical structure of                  the landscape determines pond establishment and location, wetland                                                                                               shape and seasonal dynamics, but biological feedbacks (beaver-                  food, organic matter-redox potential) determine pond abandonment                                                                                                and long-term dynamics of the landscape.  (2) Variability in                    transition probabilities is determined by variations in the                     hydrologic regime and the food supply over different temporal                   scales.  Different lag times in various processes produce                       multisuccessional pathways and multiple equilibria.  (3)                        Resultant nutrient pathways are a response to beaver population                 dynamics, lag-time in the system, topography, and history of the                                                                                                affected areas.  The result is manifested by vegetative                         succession patterns from unique combinations of nutrient                        characteristics, hydrology, and initial vegetation.                                  The hypotheses will be tested by quantifying beaver-                                                                                                       landscape interactions on the 294 km2 Kabetogama Peninsula in                                                                                                   northern Minnesota from aerial photographs taken on 14 dates                                                                                                    from 1927 to 1991 (65 yrs).  Field studies will be conducted of                                                                                                 the food supply, hydrology, redox potential, and nutrient                                                                                                       availability.  Experimental nutrient manipulations of plots will                                                                                                be used to guage plant community response to changing hydrologic                                                                                                conditions.  These results will be coupled with information on                                                                                                  beaver population dynamics to examine landscape patch dynamics                                                                                                  using nested, non-stationary Markovian models.  The results of                                                                                                  this research will have direct ecosystem implications for                                                                                                       understanding the dynamics of spatial and temporal transitions                                                                                                  over various scales, the role of a keystone herbivore in                                                                                                        influencing landscape patch and boundary dynamics,                                                                                                              multisuccessional pathways, landscape nutrient economies, and                                                                                                   lag-time responses within ecosystems.
[{'FirstName': 'John', 'LastName': 'Pastor', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'John Pastor', 'EmailAddress': 'jpastor@d.umn.edu', 'NSF_ID': '000191764', 'StartDate': '03/01/1989', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Carol', 'LastName': 'Johnston', 'PI_MID_INIT': 'A', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Carol A Johnston', 'EmailAddress': 'carol.johnston@sdstate.edu', 'NSF_ID': '000147092', 'StartDate': '03/01/1989', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Robert', 'LastName': 'Naiman', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Robert J Naiman', 'EmailAddress': 'naiman@u.washington.edu', 'NSF_ID': '000439664', 'StartDate': '01/21/1994', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
{'Name': 'University of Washington', 'CityName': 'SEATTLE', 'ZipCode': '981951016', 'PhoneNumber': '2065434043', 'StreetAddress': '4333 BROOKLYN AVE NE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Washington', 'StateCode': 'WA', 'CONGRESSDISTRICT': '07', 'CONGRESS_DISTRICT_ORG': 'WA07', 'ORG_UEI_NUM': 'HD1WMN6945W6', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF WASHINGTON', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
[{'Code': '1128', 'Text': 'Population & Community Ecology'}, {'Code': '9120', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8817665.xml'}