Edwin "Win" Everham researches how ecosystems respond to disturbance events. These events include natural events like hurricanes, and ones caused by humans such as climate change and the introduction of invasive species. His work focuses on Southwest Florida, but encompasses a broad range of ecosystems.
He is currently exploring patterns of anuran communities through time in Southwest Florida as indicators of environmental change, monitoring interactions of the invasive Burmese python with the native eastern indigo snake, tracking the vectors of change in Lake Trafford following restoration dredging, analyzing the impact of mosquito control on non-target organisms, continuing work on the restoration of submerged aquatic vegetation in the Caloosahatchee River, and tracking long-term growth in multiple forest plots including mangroves in the region toward quantifying carbon dynamics.
Areas of Expertise (11)
Hurricane Impacts on Ecosystems
Impacts of Climate Change
State University of New York College of Environmental Science and Forestry: Ph.D., Environmental and Forest Biology 1996
Michigan Technological University: B.S., Community Ecology
- Association for Tropical Biology
- Ecological Society of America
- Exotic Plant Pest Control Council
- Florida Academy of Sciences
- Florida Association of Environmental Professionals
- International Association for Landscape Ecology
- International Society for Ecological Modeling
- International Society of Tropical Ecology
- Society for Ecological Restoration
- Society for Conservation Biology
Selected Media Appearances (7)
Study says Florida could need $75 billion in seawalls by 2040 because of climate change
Win Everham discusses the economic impact of climate change on cities in Southwest Florida.
Frog calls tell researchers about the health of wetlands
Win Everham discusses the frog-related research (to monitor wetland health) he's been leading for more than 15 years.
FGCU student is studying mangrove forests, our first line of defense against storm surge
Win Everham discusses the mangrove research underway by his graduate student.
Can an entire town run on solar?
PBS News Hour
Win Everham discusses the sustainability issues surrounding the town of Babcock Ranch, Florida.
These trees are being removed for new homes - and it's a good thing
Win Everham shows NBC2 through a melaleuca forest on the university campus.
Our mighty palm trees
Fort Myers Florida Weekly
Win Everham describes his study of sabal palms during Hurricane Charley in 2004.
Preserving our waters
Win Everham appears in a documentary about the history of the Estero Bay Aquatic Reserve.
Selected Event Appearances (6)
Factors affecting the restoration of (Vallisneria americana) in the Caloosahatchee River
Charlotte Harbor Watershed Summit: Showcasing Our Accomplishments. March 28-30, 2017 Punta Gorda, Florida
Content analysis of newspaper coverage of the Florida Panther (Puma concolor coryi) through time
Third Annual Corkscrew Watershed Science Forum. January 27, 2017
Home range size and habitat use by the Eastern Indigo Snake (Drymarchon couperi) in South Florida: C- 44 Reservoir Site, Allapattah Flats, and Babcock Ranch
Third Annual Corkscrew Watershed Science Forum. January 27, 2017 Coral Springs, Florida
Impacts of aeration on deep and shallow wet detention ponds southwest Florida
StormCon: North American Surface Water Quality Conference. August 5, 2008 Orlando, Florida
Impact of wildfire on wetland and upland habitats restored from invasion of Melaleuca quinquenervia
The Annual Conference on Ecosystems Restoration and Creation. Hillsborough Community College. October, 2004 Tampa, Florida
The impact of Hurricane Hugo on the Luquillo Experimental Forest
Association for Tropical Biology Annual Meeting. August, 1992 Honolulu, Hawaii
Research Focus (1)
Everham's research focuses on examining the impacts of disturbance, including exotic invasions and anthropogenic activities, on the structure of ecosystems, measuring and monitoring change in and restoration of these ecosystems. He is interested in the technological interface between simulation modeling and geographical information systems and their applications toward understanding the impact of and recovery from disturbance and land use changes. Most recently his research includes exploring effective communication of environmental issues and solutions to a larger audience.
Selected Research Grants (5)
Picayune Strand Restoration Project (PSRP)
Area Aquatic Fauna Monitoring Services $70,200
2018 Co-PIs: David W. Ceilley and Shawn Clem, in collaboration with Audubon Corkscrew Swamp Sanctuary and Johnson Engineering, Inc.
Measuring the fate and non-target impacts of Dibrom using aerial ultra low volume (ULV) spray technology in mangrove wetlands
Florida Department of Agriculture and Consumer Services (FDACS) $201,070
2013 Co PIs: D.W. Ceilley, T. El-Hefnawy, and Jonathan Hornby.
Lake Trafford: Monitoring and Management Plan
South Florida Water Management District $50,000
2011 Co-PIs Dave Ceilley and Serge Thomas.
Babcock Ranch Community baseline biological assessment: fish, herps, mammals
Kitson and Partners, Inc. $85,625
2008 Co-PI: D.W. Ceilley, P. Allman, B. Jackson, J. Jackson.
Bioavailability and sources of nutrients
City of Sanibel and Lee County Florida $769,083
2008 PI: A.N. Loh, co-PIs: D. Fugate, M. Parsons, D. Ceilley, and E. Milbrandt.
Selected Articles (5)
Kucherenko, A., J. Herman, E. M. Everham III, and H. Urakawa
2018 There is an increasing need for effective biomonitoring tools that quantify patterns of habitat occupancy by reptile species. Environmental DNA (eDNA) has been regarded as an emerging tool to detect specific target species; however, the dynamics of accumulation and degradation of eDNA in terrestrial environments are poorly understood. This study determines the time required for terrestrial snakes to leave enough eDNA behind to become detectable (accumulation time) as well as its persistence (degradation time). By targeting mitochondrial cytochrome oxidase subunit I and 12S rRNA genes of Red Cornsnakes (Pantherophis guttatus) in a controlled laboratory setting, we found that eDNA can be detected 3.5 h after the snakes had contact with soil and for up to 6 d after their removal. Estimated accumulation rate of Pantherophis guttatus eDNA per gram of snake biomass per hour was 12.6 μg. We also evaluated the applicability of eDNA detection under field conditions by targeting the mitochondrial cytochrome b gene of a cryptic invasive species in South Florida, Burmese Pythons (Python bivittatus). Soil samples were derived from two groups of field sites: telemetry-monitored refugia (i.e., radiotelemetry evidence of python presence) and telemetry-absent refugia (i.e., no telemetry evidence, but monitored with a burrow camera at time of sample collection). We were able to detect the presence of python eDNA in 66.7% of the telemetry-monitored sites that fit within our laboratory-defined residence and degradation time window. Additionally, at the telemetry-absent sites, no eDNA from Burmese Pythons was detected and burrow cameras did not detect their presence. We concluded that eDNA technology using soil can be an effective detection tool for terrestrial snakes, particularly when used with other traditional tracking and sampling methods.
Everham III, E.M., D.W. Ceilley, D.A. Croshaw, J. Firth, C.W. Gunnels IV, D.D. Hanson, S. Mariolan, R.J. Spear, B. Thomas, D.E. Van Norman, B.M. Whitmore, and J.R. Cassani
2013 The Southwest Florida Frog Monitoring Network was established in 2000 to collect long-term data on frog communities of the region. Routes of 10-12 stops were monitored monthly during the rainy season (June–September). Data on all frog calls during a three minute period were recorded using a three-level intensity code. We report results from the first ten years of monitoring to examine broad trends in the frog populations of southwest Florida. We explored the abundance of all frog species, as reflected by calling intensity, to elucidate potential factors that may influence long-term changes in frog populations and communities. These factors may include: natural variations of frog populations, disappearing and altered habitats through local and global human actions, landscape context, and the impacts of invasive species. At a regional scale, it appears that most frog species are maintaining natural variations in calling levels among years, suggesting that frogs are responding to annual variation and not regional or global changes. Use of behavioral indicators, such as calling intensity of frogs, may provide understanding of the environmental implications of altered hydroperiods and other landscape perturbations in our watershed and possibly some positive responses to restoration efforts.
Tolley, S.G., M.R. McDonald, E.M. Everham III, and M. Savarese
2002 Interdisciplinary teaching, research experience, and active, collaborative strategies have all been identified as practices highly favorable to the learning process. By using the university campus as the focus for the study of the entire watershed within which it is situated, the Campus Ecosystem Model presents a context for incorporating these pedagogical elements into a useful framework for undergraduate science education.
Turner, M.G., V.H. Dale, and E.M. Everham III
1997 T he importance of natural disturbances in shaping landscapes and influencing ecosystems is now well recognized in ecology (e.g., Pickett and White 1985, Turner 1987, White 1979). Disturbance can be defined generally as any relatively discrete event in time that disrupts ecosystem, community, or population structure and changes resource or substrate availability or the physical environment (White and Pickett 1985). In recent years, ecologists have learned a great deal about the dynamics and effects of relatively small, frequent disturbances.
Everham, E.M., III, and N.V.L. Brokaw
1996 The literature on the effects of catastrophic wind disturbance (windstorms, gales, cyclones, hurricanes, tornadoes) on forest vegetation is reviewed to examine factors controlling the severity of damage and the dynamics of recovery. Wind damage has been quantified in a variety of ways that lead to differing conclusions regarding severity of disturbance. Measuring damage as structural loss (percent stems damaged) and as compositional loss (percent stems dead) is suggested as a standard for quantifying severity. Catastrophic wind produces a range of gaps from the size caused by individual treefalls to much larger areas. The spatial pattern of damage is influenced by both biotic and abiotic factors. Biotic factors that influence severity of damage include stem size, species, stand conditions (canopy structure, density), and the presence of pathogens. Abiotic factors that influence severity of damage include the intensity of the wind, previous disturbance, topography, and soil characteristics. Recovery from catastrophic wind disturbance follows one of four paths: regrowth, recruitment, release, or repression. The path of recovery for a given site is controlled both by the severity of disturbance and by environmental gradients of resources. Recovery is influenced also by frequency of wind disturbance, which varies across geographical regions. To develop robust theories regarding catastrophic wind disturbance, the relative roles of different abiotic and biotic factors in controlling the patterns of severity of damage must be determined. These patterns of severity and environmental gradients must then be tied to long-term dynamics of recovery.