Mary Brown
Science and Products
Treasure Coast and Central Florida Fish Slams- 2019
In March and June 2019, USGS researchers joined partners in Treasure Coast and Central Florida where they sampled freshwater bodies for non-native fishes. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native fishes.
Fish Slam November 2018
In November 2018, USGS researchers joined partners in South Florida where they sampled freshwater bodies for non-native fishes. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native fishes.
Fish Slam - Fall 2016
November 1 - 2, 2016 – Eight teams of fishery biologists from the US Geological Survey (USGS), US Fish and Wildlife Service - Peninsular Florida Fisheries Office and Welaka National Fish Hatchery (USFWS), the National Park Service (NPS), Florida Fish and Wildlife Conservation Commission (FWC), Florida International University (FIU), and Zoo Miami sampled 20 sites for non-native fishes in Palm...
Fish Slam - Spring 2016
May 23, 2016 – Five teams of fishery biologists from the U.S. Geological Survey (USGS), Florida Fish and Wildlife Conservation Commission (FWC), the National Park Service (NPS), Florida Museum of Natural History (FLMNH), University of Florida (UF), and Florida International University (FIU) sampled 12 sites for non-native fishes in Broward and Miami-Dade counties in southeastern Florida.
Species interactions and the effects of climate variability on a wetland amphibian metacommunity
Disentangling the role that multiple interacting factors have on species responses to shifting climate poses a significant challenge. However, our ability to do so is of utmost importance to predict the effects of climate change on species distributions. We examined how populations of three species of wetland-breeding amphibians, which varied in...
Davis, Courtney L.; Miller, David A.W.; Walls, Susan C.; Barichivich, William J.; Riley, Jeffrey W.; Brown, Mary E. Life history plasticity does not confer resilience to environmental change in the mole salamander (Ambystoma talpoideum)
Plasticity in life history strategies can be advantageous for species that occupy spatially or temporally variable environments. We examined how phenotypic plasticity influences responses of the mole salamander, Ambystoma talpoideum, to disturbance events at the St. Marks National Wildlife Refuge (SMNWR), FL, USA from 2009 to 2014. We observed...
Courtney L. Davis; David A.W. Miller; Walls, Susan C.; Barichivich, William J.; Riley, Jeffrey W.; Brown, Mary E. Invasive species: Ocean ecosystem case studies for earth systems and environmental sciences
Marine species are increasingly transferred from areas where they are native to areas where they are not. Some nonnative species become invasive, causing undesirable impacts to environment, economy and/or human health. Nonnative marine species can be introduced through a variety of vectors, including shipping, trade, inland corridors (such as...
Schofield, Pamela J.; Brown, Mary E. Anuran site occupancy and species richness as tools for evaluating restoration of a hydrologically-modified landscape
A fundamental goal of wetland restoration is to reinstate pre-disturbance hydrological conditions to degraded landscapes, facilitating recolonization by native species and the production of resilient, functional ecosystems. To evaluate restoration success, baseline conditions need to be determined and a reference target needs to be established...
Walls, Susan C.; Waddle, J. Hardin; Barichivich, William J.; Bartoszek, Ian A.; Brown, Mary E.; Hefner, J. M.; Schuman, Melinda J. Variation in salinity tolerance among larval anurans: implications for community composition and the spread of an invasive, non-native species
Amphibians in freshwater coastal wetlands periodically experience acute exposure to salinity from hurricane-related overwash events, as well as chronic exposure associated with rising sea levels. In a comparative experimental approach, we examined whether seven species of anuran amphibians vary in their tolerance to changes in salinity. In a...
Brown, Mary E.; Walls, Susan C. Influence of drought on salamander occupancy of isolated wetlands on the southeastern Coastal Plain of the United States
In the southeastern U.S., changes in temperature and precipitation over the last three decades have been the most dramatic in winter and spring seasons. Continuation of these trends could negatively impact pond-breeding amphibians, especially those that rely on winter and spring rains to fill seasonal wetlands, trigger breeding, and ensure...
Walls, Susan C.; Barichivich, William J.; Brown, Mary E.; Scott, David E.; Hossack, Blake R. Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate
The Class Amphibia is one of the most severely impacted taxa in an on-going global biodiversity crisis. Because amphibian reproduction is tightly associated with the presence of water, climatic changes that affect water availability pose a particularly menacing threat to both aquatic and terrestrial-breeding amphibians. We explore the impacts that...
Walls, Susan C.; Barichivich, William J.; Brown, Mary E. Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States
No abstract available.
Schofield, Pamela J.; Brown, Mary E.; Fuller, Pamela L. Application of diagnostic tests for mycoplasmal infections of desert and gopher tortoises with management recommendations
Mycoplasmosis is a transmissible upper respiratory tract disease that has affected plans for management and conservation of wild desert and gopher tortoises in the United States. Although impact of mycoplasmosis on populations of desert and gopher tortoises is unknown, increased prevalence of seropositive animals as well as field observations of...
Brown, D.R.; Schumacher, Isabella M.; Mclaughlin, Grace S.; Wendland, L.D.; Brown, Mary E.; Klein, P.A.; Jacobson, E.R. Mycoplasma agassizii sp., nov., isolated from the upper respiratory tract of the desert tortoise (Gopherus agassizii) and the gopher tortoise (Gopherus polyphemus).
Biochemical, serological and molecular genetic studies were performed on seven mycoplasma isolates that were recovered from the upper respiratory tract of clinically ill desert tortoises. The isolates were serologically related to each other but serologically distinct from previously described species. Unique mycoplasma species-specific 16S rRNA...
Brown, Mary E.; Brown, D.R.; Kelin, P.A.; McLaughlin, G.S.; Schumacher, Isabella M.; Jacobson, E.R.; Adams, H.P.; Tully, J.G.