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Catherine Langtimm, Ph.D. (Former Employee)

Science and Products

Manatee swims in a Florida spring

Population Ecology of Florida Manatees

USGS is working with partners to understand how the federally protected Florida manatee ( Trichechus manatus latirostris) population changes over time and responds to threats.
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center, Wetland and Aquatic Research Center
Population Ecology of Florida Manatees

Population Ecology of Florida Manatees

USGS is working with partners to understand how the federally protected Florida manatee ( Trichechus manatus latirostris) population changes over time and responds to threats.
Learn More
West Indian manatees, Trichechus manatus

Modeling, Estimation, and Adaptive Management of Florida Manatees

The Challenge: Florida manatees are threatened by watercraft-related mortality, the potential loss of warmwater habitat, red tide events, and other anthropogenic factors. The USFWS and the Florida Fish and Wildlife Conservation Commission have regulatory authorities under the Endangered Species Act (ESA), the Marine Mammal Protection Act (MMPA), and state statutes to recover manatees. To support...
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center
Modeling, Estimation, and Adaptive Management of Florida Manatees

Modeling, Estimation, and Adaptive Management of Florida Manatees

The Challenge: Florida manatees are threatened by watercraft-related mortality, the potential loss of warmwater habitat, red tide events, and other anthropogenic factors. The USFWS and the Florida Fish and Wildlife Conservation Commission have regulatory authorities under the Endangered Species Act (ESA), the Marine Mammal Protection Act (MMPA), and state statutes to recover manatees. To support...
Learn More
Filter Total Items: 35

Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures

Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate...
Authors
Michael Osland, Philip Stevens, Margaret Lamont, Richard Brusca, Kristen Hart, Hardin Waddle, Catherine Langtimm, Caroline Williams, Barry Keim, Adam Terando, Eric Reyier, Katie Marshall, Michael E. Loik, Ross Boucek, Amanda Lewis, Jeffrey A. Seminoff
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Repurposing a hindcast simulation of the 1926 Great Miami Hurricane, south Florida Repurposing a hindcast simulation of the 1926 Great Miami Hurricane, south Florida

Hydrodynamic model hindcasts of the surface water and groundwater of the Everglades and the greater Miami, Florida, area were used to simulate hydrology using estimated storm surge height, wind field, and rainfall for the Great Miami Hurricane (GMH), which struck on September 18, 1926. Ranked estimates of losses from hurricanes in inflation-adjusted dollars indicate that the GMH was one...
Authors
M. Dennis Krohn, Eric D. Swain, Catherine A. Langtimm, Jayantha Obeysekera
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Caribbean-Florida Water Science Center (CFWSC)

Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2016 Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2016

Trichechus manatus (West Indian manatee), especially T. m. latirostris, the Florida subspecies, has been the focus of conservation efforts and extensive research since its listing under the Endangered Species Act of 1973. To determine the status of, and severity of threats to, the Florida manatee, a comprehensive revision and update of the manatee Core Biological Model was completed and...
Authors
Michael C. Runge, Carol A. Sanders-Reed, Catherine A. Langtimm, Jeffrey A. Hostetler, Julien Martin, Charles J. Deutsch, Leslie I. Ward-Geiger, Gary L. Mahon
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center, Wetland and Aquatic Research Center

Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris) Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris)

This report provides supporting details and evidence for the rationale, validity and efficacy of a new mark-recapture model, the Barker Robust Design, to estimate regional manatee survival rates used to parameterize several components of the 2012 version of the Manatee Core Biological Model (CBM) and Threats Analysis (TA). The CBM and TA provide scientific analyses on population...
Authors
Catherine A. Langtimm, William L. Kendall, Cathy A. Beck, Howard I. Kochman, Amy L. Teague, Gaia Meigs-Friend, Claudia L. Penaloza
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Evaluation of habitat suitability index models by global sensitivity and uncertainty analyses: a case study for submerged aquatic vegetation Evaluation of habitat suitability index models by global sensitivity and uncertainty analyses: a case study for submerged aquatic vegetation

Habitat suitability index (HSI) models are commonly used to predict habitat quality and species distributions and are used to develop biological surveys, assess reserve and management priorities, and anticipate possible change under different management or climate change scenarios. Important management decisions may be based on model results, often without a clear understanding of the...
Authors
Zuzanna Zajac, Bradley Stith, Andrea C. Bowling, Catherine A. Langtimm, Eric D. Swain
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2012 Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2012

The endangered West Indian manatee (Trichechus manatus), especially the Florida subspecies (T. m. latirostris), has been the focus of conservation efforts and extensive research since its listing under the Endangered Species Act. On the basis of the best information available as of December 2012, the threats facing the Florida manatee were determined to be less severe than previously...
Authors
Michael C. Runge, Catherine A. Langtimm, Julien Martin, Christopher J. Fonnesbeck
By
Ecosystems Mission Area, Eastern Ecological Science Center, Wetland and Aquatic Research Center
Florida Manatees Likely to Persist For At Least 100 Years—US Geological Survey  

Florida Manatees Likely to Persist For At Least 100 Years—US Geological Survey  

Florida’s iconic manatee population is highly likely to endure for the next 100 years, so long as wildlife managers continue to protect the marine...

Read Article
Media Inquiries on USGS Manatee Research

Media Inquiries on USGS Manatee Research

We appreciate your interest in USGS' Sirenia Project. To help inform members of the media and public, we have provided relevant publications, reports...

Read Article

Science and Products

Manatee swims in a Florida spring

Population Ecology of Florida Manatees

USGS is working with partners to understand how the federally protected Florida manatee ( Trichechus manatus latirostris) population changes over time and responds to threats.
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center, Wetland and Aquatic Research Center
Population Ecology of Florida Manatees

Population Ecology of Florida Manatees

USGS is working with partners to understand how the federally protected Florida manatee ( Trichechus manatus latirostris) population changes over time and responds to threats.
Learn More
West Indian manatees, Trichechus manatus

Modeling, Estimation, and Adaptive Management of Florida Manatees

The Challenge: Florida manatees are threatened by watercraft-related mortality, the potential loss of warmwater habitat, red tide events, and other anthropogenic factors. The USFWS and the Florida Fish and Wildlife Conservation Commission have regulatory authorities under the Endangered Species Act (ESA), the Marine Mammal Protection Act (MMPA), and state statutes to recover manatees. To support...
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center
Modeling, Estimation, and Adaptive Management of Florida Manatees

Modeling, Estimation, and Adaptive Management of Florida Manatees

The Challenge: Florida manatees are threatened by watercraft-related mortality, the potential loss of warmwater habitat, red tide events, and other anthropogenic factors. The USFWS and the Florida Fish and Wildlife Conservation Commission have regulatory authorities under the Endangered Species Act (ESA), the Marine Mammal Protection Act (MMPA), and state statutes to recover manatees. To support...
Learn More
Filter Total Items: 35

Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures

Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate...
Authors
Michael Osland, Philip Stevens, Margaret Lamont, Richard Brusca, Kristen Hart, Hardin Waddle, Catherine Langtimm, Caroline Williams, Barry Keim, Adam Terando, Eric Reyier, Katie Marshall, Michael E. Loik, Ross Boucek, Amanda Lewis, Jeffrey A. Seminoff
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Repurposing a hindcast simulation of the 1926 Great Miami Hurricane, south Florida Repurposing a hindcast simulation of the 1926 Great Miami Hurricane, south Florida

Hydrodynamic model hindcasts of the surface water and groundwater of the Everglades and the greater Miami, Florida, area were used to simulate hydrology using estimated storm surge height, wind field, and rainfall for the Great Miami Hurricane (GMH), which struck on September 18, 1926. Ranked estimates of losses from hurricanes in inflation-adjusted dollars indicate that the GMH was one...
Authors
M. Dennis Krohn, Eric D. Swain, Catherine A. Langtimm, Jayantha Obeysekera
By
Ecosystems Mission Area, Wetland and Aquatic Research Center , Caribbean-Florida Water Science Center (CFWSC)

Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2016 Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2016

Trichechus manatus (West Indian manatee), especially T. m. latirostris, the Florida subspecies, has been the focus of conservation efforts and extensive research since its listing under the Endangered Species Act of 1973. To determine the status of, and severity of threats to, the Florida manatee, a comprehensive revision and update of the manatee Core Biological Model was completed and...
Authors
Michael C. Runge, Carol A. Sanders-Reed, Catherine A. Langtimm, Jeffrey A. Hostetler, Julien Martin, Charles J. Deutsch, Leslie I. Ward-Geiger, Gary L. Mahon
By
Ecosystems Mission Area, Species Management Research Program, Eastern Ecological Science Center, Wetland and Aquatic Research Center

Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris) Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris)

This report provides supporting details and evidence for the rationale, validity and efficacy of a new mark-recapture model, the Barker Robust Design, to estimate regional manatee survival rates used to parameterize several components of the 2012 version of the Manatee Core Biological Model (CBM) and Threats Analysis (TA). The CBM and TA provide scientific analyses on population...
Authors
Catherine A. Langtimm, William L. Kendall, Cathy A. Beck, Howard I. Kochman, Amy L. Teague, Gaia Meigs-Friend, Claudia L. Penaloza
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Evaluation of habitat suitability index models by global sensitivity and uncertainty analyses: a case study for submerged aquatic vegetation Evaluation of habitat suitability index models by global sensitivity and uncertainty analyses: a case study for submerged aquatic vegetation

Habitat suitability index (HSI) models are commonly used to predict habitat quality and species distributions and are used to develop biological surveys, assess reserve and management priorities, and anticipate possible change under different management or climate change scenarios. Important management decisions may be based on model results, often without a clear understanding of the...
Authors
Zuzanna Zajac, Bradley Stith, Andrea C. Bowling, Catherine A. Langtimm, Eric D. Swain
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Wetland and Aquatic Research Center

Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2012 Status and threats analysis for the Florida manatee (Trichechus manatus latirostris), 2012

The endangered West Indian manatee (Trichechus manatus), especially the Florida subspecies (T. m. latirostris), has been the focus of conservation efforts and extensive research since its listing under the Endangered Species Act. On the basis of the best information available as of December 2012, the threats facing the Florida manatee were determined to be less severe than previously...
Authors
Michael C. Runge, Catherine A. Langtimm, Julien Martin, Christopher J. Fonnesbeck
By
Ecosystems Mission Area, Eastern Ecological Science Center, Wetland and Aquatic Research Center
Florida Manatees Likely to Persist For At Least 100 Years—US Geological Survey  

Florida Manatees Likely to Persist For At Least 100 Years—US Geological Survey  

Florida’s iconic manatee population is highly likely to endure for the next 100 years, so long as wildlife managers continue to protect the marine...

Read Article
Media Inquiries on USGS Manatee Research

Media Inquiries on USGS Manatee Research

We appreciate your interest in USGS' Sirenia Project. To help inform members of the media and public, we have provided relevant publications, reports...

Read Article
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