Grantee Research Project Results
Population Biology of the Federally Threatened Floodplain Species, Boltonia Decurrens (Decurrent False Aster): Stage Based Demography and Patterns of Succession in Freshwater, Wetland Habitats
EPA Grant Number: U915781Title: Population Biology of the Federally Threatened Floodplain Species, Boltonia Decurrens (Decurrent False Aster): Stage Based Demography and Patterns of Succession in Freshwater, Wetland Habitats
Investigators: Mettler-Cherry, Paige A.
Institution: Southern Illinois University - Carbondale
EPA Project Officer: Packard, Benjamin H
Project Period: August 1, 2000 through August 1, 2003
Project Amount: $88,469
RFA: STAR Graduate Fellowships (2000) RFA Text | Recipients Lists
Research Category: Fellowship - Ecology , Ecological Indicators/Assessment/Restoration , Academic Fellowships
Objective:
The objectives of this research are to: (1) apply a series of stage-based transition models to Boltonia decurrens (B. decurrens) and use it to quantify the rate of population growth (lambda) and the sensitivity of lambda when specific life stages are affected; and (2) determine patterns of wetland succession at population sites of B. decurrens.
Approach:
To collect data for the stage based transition model, nine plots will be established in four separate treatment areas using plowing frequency (every year, every other year, every third year, and no plowing) to simulate different disturbance regimes. All individuals of B. decurrens will be marked and followed throughout each year of the study. To study wetland succession, three transects, 10 meters in length, will be established at five different populations sites representing the known range of the species. Vegetation located on the transects is identified at anthesis and stem density estimated monthly throughout the growing season. Species richness, evenness, and diversity will be calculated, and ordination will be used to compare sites.
Expected Results:
Determination of wetland succession patterns are vital to the management of B. decurrens, whose populations are extirpated within 3-5 years of establishment when flooding does not occur. By identifying the pivotal point between population growth and decline, management practices can be formulated to begin population regeneration anew.
Supplemental Keywords:
Boltonia decurrens, Illinois River, stage-based demography, transition matrix model, lambda, disturbance, richness, evenness, diversity, ordination, threatened, endangered, population, conservation, succession., RFA, Ecosystem Protection/Environmental Exposure & Risk, Scientific Discipline, Geographic Area, Ecological Indicators, Ecological Risk Assessment, Ecosystem Protection, Ecosystem/Assessment/Indicators, exploratory research environmental biology, Midwest, Ecological Effects - Environmental Exposure & Risk, Ecological Effects - Human Health, Chemical Mixtures - Environmental Exposure & Risk, Ecology and Ecosystems, wetland succession, stage-based demography, Illinois River, endangered species, flood plain species, threatened floodplain species, ecosystem, ordination, wetland habitat, freshwater species, transition matrix model, diversity, population, Boltonia Decurrens (B. decurrens), demographic, conservation, population biologyProgress and Final Reports:
The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.