University of Florida Department of Geography
The Navi-Gator
January 2020, ISSUE 3 (Download PDF)

Evening of excellence

John & Fawn Dunkle Award for Graduate Student Travel: Ryan Good & Guoqian Yan
David L. Niddrie Excellence Fund: Tierney Shimansky & Shreejana Bhattarai
Little Family Student Fellowship Award: Caroline Parks
Ryan Poehling Award for Top Graduate Student: Michael Dillen (Top Master’s Student) & Cat Lippi (Top PhD Student)

Congratulations to our winners! We loved having you all for a night of celebration, reward and remembrance!

A Survey of Tick-Borne Bacterial Pathogens in Florida
Investigating diseases across mainland Florida!
A team from the University of Florida – including Geography’s Dr. Gregory Glass – has examined the distribution and presence of tick-bourne bacterial pathogens in Florida. Ticks were collected at 41 sites across Florida. DNA was extracted from 1,600 ticks – determining further investigation should be done to identify regional hotspots of tick-borne pathogens. Read more on the Geography website under “Recent Publications.”

Colloquium
12/5 Terry J. Doonan
Conserving Imperiled Mammal Species in Florida Across a Changing Landscape
Dr. Robert McCleery
Dr. Roberta Mendonça De Carvalho
Dr. Robert Walker
Where Are they now?
Our recent grads have found themselves in some interesting places!
Morgan Walker, class of 2019, works with Jason Blackburn as a Master’s research assistant.

GAINESVILLE – In the battle against vector borne disease, mosquito control using insecticides is an essential tool. But what happens when that tool starts to fail, and how do you know it? Insecticides are regularly used by public health agencies to reduce populations of blood-sucking mosquitoes. Effective control programs are important to public health because, in addition to posing a nuisance, mosquitoes can also spread diseases to humans. Insecticide resistance, where mosquitoes adapt to survive exposure to commonly-used chemicals, has become an increasingly pressing issue for many health agencies, undermining mosquito control efforts. New research by the Quantitative Disease Ecology and Conservation (QDEC) Lab Group at the University of Florida, the Center for Research on Health in Latin America (CISeAL) at Pontificia Universidad Católica del Ecuador (PUCE), the Institute for Global Health and Translational Science at SUNY Upstate Medical University, Escuela Superior Politécnica del Litoral (ESPOL), and the Universidad Técnica de Machala is the first attempt to investigate seasonal and geographic variations of mosquito insecticide resistance in southern coastal Ecuador, a region where mosquito control is key to stopping the spread of serious diseases like Zika and dengue fever. The study was funded by the U.S. Centers for Disease Control and Prevention (CDC). The team of researchers used both genetic screening and pesticide assays to evaluate insecticide resistance in mosquitoes collected in urban locations at different seasons. Differences in the resistance status of mosquitoes to the insecticides commonly used by the local health ministry were found both across collection seasons and across the four cities in the study area. Detected resistance to Malathion, deltamethrin, and alpha-cypermethrin was particularly high in the port city of Machala, which has a long history of dengue outbreaks and insecticide use. Information on insecticide resistance status, patterns, and timing will help local public health professionals design sustainable mosquito control programs that will continue to be effective in the fight against disease.

Read Seasonal and geographic variation in insecticide resistance in Aedes aegypti in southern Ecuador, at PLoS Neglected Tropical Diseases.

La Resistencia a los Insecticidas Amenaza el Control de las Enfermedades Transmitidas por Mosquitos en Ecuador

GAINESVILLE – En la batalla contra las enfermedades transmitidas por vectores, el uso de insecticidas para el control de mosquito es una herramienta esencial. Pero ¿qué sucede cuando esa herramienta comienza a fallar y cómo lo sabe? Las agencias de salud pública utilizan regularmente los insecticidas para reducir las poblaciones de mosquitos que chupan la sangre. Los programas de control efectivos son importantes para la salud pública porque, además de ser una molestia, los mosquitos también pueden transmitir enfermedades a los humanos. La resistencia hacia los insecticidas, donde los mosquitos se adaptan para sobrevivir a la exposición a sustancias químicas de uso común, se ha convertido en un problema cada vez más urgente para muchas agencias de salud, desfavoreciendo los esfuerzos de control de mosquitos. Una nueva investigación realizada por el Grupo de Laboratorios de Ecología y Conservación de Enfermedades Cuantitativas (QDEC) en la Universidad de Florida, el Centro de Investigación para la Salud en América Latina (CISeAL) en la Pontificia Universidad Católica del Ecuador (PUCE), el Instituto de Salud Global y la Ciencia Traslacional en la Universidad Médica del Estado de SUNY, la Escuela Superior Politécnica del Litoral (ESPOL), y la Universidad Técnica de Machala es el primer intento en investigar las variaciones estacionales y geográficas sobre resistencia a insecticidas en mosquitos en la costa sur de Ecuador, una región donde el control de mosquitos es clave para detener la propagación de enfermedades graves como el Zika y el Dengue. El estudio fue financiado por los Centros para el Control y la Prevención de Enfermedades (CCPEEU). El equipo de investigación usó tanto análisis genético como los ensayos de pesticidas para evaluar la resistencia a insecticidas en los mosquitos recolectados en áreas urbanas, en diferentes estaciones. Diferencias en el estado de resistencia en mosquitos a los insecticidas comúnmente utilizados por el ministerio de salud local, se encontraron tanto en las diferentes temporadas de recolección, como en las cuatro ciudades dentro del área de estudio. La resistencia detectada al malatión, la deltametrina, y la alfa-cipermetrina fue particularmente alta en la ciudad portuaria de Machala, que tiene una larga historia de brotes de dengue y uso de insecticidas. La información sobre el estado de resistencia hacia insecticidas, los patrones y el tiempo ayudará a los profesionales de la salud pública local a diseñar programas sostenibles de control de mosquitos que continuarán siendo eficaces en la lucha contra la enfermedad.

Lee Seasonal and geographic variation in insecticide resistance in Aedes aegypti in southern Ecuador, en PLoS Neglected Tropical Diseases.

 

Media contact: Mike Ryan Simonovich

Image credit: CDC/ Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame/James Gathany

GAINESVILLE – Blood sucking insects such as the Yellow fever mosquito, Aedes aegypti, are more than just a nuisance in Ecuador, they also spread diseases such as dengue fever, chikungunya and Zika. A warming world means that public health officials must decide where to direct surveillance and mosquito control efforts not only today, but also decades down the road given dramatic shifts in mosquito habitat that will take place thanks to climate change.

Ecuadorian agencies now have a powerful helping hand: a recent paper in PLoS Neglected Tropical Diseases provides detailed maps forecasting where mosquitoes – and diseases – are likely to be in a warmer future.

The new work from the University of Florida’s Quantitative Disease Ecology & Conservation Lab Group (QDEC Lab) and the Emerging Pathogens Institute assesses the current and future geographic distribution of Ae. aegypti throughout Ecuador. The study was led by PhD Candidate Ms. Cat Lippi and is the result of a long-term collaboration with SUNY Upstate Medical University and the Ecuadorian Ministry of Health. Lippi’s committee chair, EPI researcher and QDEC founder Dr. Sadie Ryan, also contributed to the project, as did EPI investigator Dr. Jason Blackburn.

The research team repurposed historic larval mosquito surveillance data collected by the Ministry of Health between 2000 and 2012 in Ecuadorian households to predict where Ae. aegypti may occur in areas that have not yet been surveyed. Aedes aegypti mosquitoes are important because they are a vector for several different mosquito-borne diseases and are able to reproduce in small quantities of standing water, making them common in urban settings. The research team used environmental and climate modeling to analyze how areas currently suitable for the mosquito may shift in the future as a result of climate change.

Maps A and E show mosquito distribution today while maps B-D and F-H show where mosquitoes can be predicted in the future given different climate change scenarios.

“We wanted to show the Ministry of Health in Ecuador where disease-carrying mosquitoes might occur in the future,” Lippi says. By analyzing the environmental and climactic characteristics associated with where mosquitoes occur in Ecuador today, the team extrapolated where mosquitoes may occur in 2050 under a range of climate change scenarios and used the presence of these mosquitoes as a proxy for where disease would occur.

The models show that Ae. aegypti are likely to expand their range into regions of transitional elevation along the Andes mountain range by midcentury. The expanded habitat includes the portion of mountainous area where valley floors give way to a mountain’s lower slopes. The higher reaches of the Andes famed peaks are expected to remain protected pockets that will still be too cool, even with extreme warming, for Ae. aegypti to survive. At the same time, changing climate will reduce the mosquito’s range in the eastern portion of the country’s Amazon.

“When there is a population that has never been exposed to pathogens like dengue or Zika, they don’t have any immunity, and that population will be vastly more susceptible to an acute outbreak,” Lippi says. “There are thousands of Ecuadorians who will be exposed to mosquitoes in the future who have never had to deal with them before.”

The team will share their results with the Ecuadorian Ministry of Health, which will use the data to prepare for the future. Previous work through the team’s collaboration with Ecuador’s Ministry of Health showed that local knowledge and attitudes are significantly associated with the risk of Ae. aegypti mosquitoes in households in Ecuador, although effects on actual dengue fever risk are less clear. Mosquito-borne diseases pose a serious threat to public health throughout Ecuador and Latin America, where dengue alone accounts for an estimated 16 million infections occurring in the Americas each year.

“Our work gives their health department good forewarning of where to focus their preparations to prevent future outbreaks, and this will help them to conserve limited resources,” Lippi says. Preparations may include educational campaigns on using insect repellent, and window and door screens, as well as how to safely store household water in covered containers. The government can also coordinate spraying efforts to reduce mosquito larvae in the environment.

“Of course we expect to see changes in habitat and species’ ranges due to future climate change,” Lippi says. “But what this study addresses is the question of where those changes will occur, and how severe those changes may be, all within the context of disease risk to people.”

Un nuevo estudio de la Universidad de Florida (Estados Unidos) sugiere que los mosquitos que transmiten enfermedades podrían infectar a poblaciones humanas en Los Andes ecuatorianos debido al cambio climático

Comunidades en Latino América tienen el desafío de reducir la exposición a mosquitos que transmiten enfermedades, como el Aedes aegypti. En Ecuador, este mosquito es más que una molestia. El Aedes aegypti trasmite víruses que causan enfermedades de alta consideración para la salud pública incluyendo dengue, chikungunya y Zika. Dónde el Ministerio de Salud Publica (MSP) podría enfocar los esfuerzos de vigilancia y control de estos mosquitos, hoy y en el futuro, tomando en cuenta el cambio climático?

Un nuevo estudio del grupo, Ecología de Enfermedades y Conservación Cuantitativa (QDEC), de la Universidad de Florida, analiza la distribución geográfica del Aedes aegypti a través de todo Ecuador. El proyecto fue dirigido por Cat Lippi, estudiante de PhD de QDEC, y es el resultado de una colaboración a largo plazo con la Universidad del Estado de New York y Universidad Médica de “Upstate” (SUNY UPSTATE) y el MSP del Ecuador. El equipo de investigadores usó datos históricos de vigilancia de mosquitos recolectados por el MSP para predecir lugares donde Aedes aegypti podría estar presente. Áreas que no se ha inspeccionado de una manera activa y áreas donde podría estar presente en el futuro bajo condiciones de cambio climático. Modelos de “nicho ecológico” fueron creados usando información sobre lugares con la presencia actual del moquito y con variables básicos del ambiente. Los modelos fueron desarrollados usando condiciones climatológicas actuales y futuras, hasta el año 2050.

Este estudio muestra que lugares con elevaciones intermedias a lo largo de Los Andes pueden convertirse en zonas mas asequibles para la presencia de Aedes aegypti en el año 2050. Este descubrimiento sugiere que la población que actualmente viven en estas zonas de transición puede correr el riesgo, en el futuro, de ser expuesto a enfermedades transmitidas por mosquitos, como resultado de cambio climático. Los autores reportan que aumentará la población con riesgo de exposición por más de 12,000 personas bajo los escenarios extremos de cambio climático. Al mismo tiempo, los investigadores identificaron áreas que pueden ser menos propicias para los mosquitos, como la cuenca de la Amazonia.

Actualmente, la mayor parte de las personas que viven en Los Andes están protegidos por las enfermedades transmitidos por mosquitos debido a las altas elevaciones, lo que produce un ambiente frio y no apto para los moquitos. En situaciones extremas de cambio climático, los mosquitos pueden invadir nuevas lugares con elevación de 900 metros más alto que los lugares en actuales condiciones climatológicas. “Las personas que vivan en esta zona de expansión de enfermedades pueden ser más susceptibles a futuros brotes de enfermedades debido a varios factores, incluyendo falta de inmunidad debido a exposición previa al patógeno y falta de conocimiento y costumbres asociados con la prevención de mosquitos y costumbres de protección personal, como el uso de repelente,” indica Lippi. Estudios previos en colaboración con el MSP del Ecuador mostraron que el conocimiento y actitudes de las poblaciones locales están asociados con el riesgo de la presencia de Aedes aegypti en hogares en Machala. Se recomienda estudios en estos nuevas áreas de futuro riesgo.

Las enfermedades transmitidas por mosquitos son una amenaza para la salud pública en toda Latinoamérica, donde dengue causa aproximadamente 16 millones de infecciones anualmente. Estudios como éstos enfatizan la importancia de incorporar la ciencia de “Geografía de la salud” dentro de los estándares de la práctica de la educación pública, proveyendo información más precisa a las agencias de salud pública para mejorar el uso de escasos recursos para el de control de estas enfermedades y para desarrollar intervenciones de control vectorial y de educación pública en lugares específicos.

Media contact: Mike Ryan Simonovich

GAINESVILLE, FL – With its turquoise waters and abundant wildlife, Ecuador’s Galapagos Islands have long been a vacation dream of many. Tourist guides highlight playful sea lions and giant tortoises, but they do not talk about the mosquitoes. For the more than 30,000 people who live there, emerging epidemics of mosquito-borne disease such as dengue, Zika, and chikungunya, which causes fever and joint pain, are an ongoing threat.

A new Medical Geography study led by UF medical geographer Dr. Sadie J. Ryan, examined the social ecological factors associated with dengue fever and mosquito presence in the Galapagos Islands. This work by UF Geography’s Quantitative Disease Ecology & Conservation Lab Group, is the first of its kind conducted in the Galapagos, where dengue has been considered a newly emerging disease since cases were first detected in the early 2000’s.

Ryan collaborated with the Biosecurity Agency of the Galapagos and colleagues from the Universidad San Francisco de Quito, the Escuela Superior Politecnica del Litoral, and SUNY Upstate Medical University as well as UF Geography PhD Student Catherine Lippi and Postdoctoral Fellow Dr. Gabriella Hamerlinck. The team conducted household questionnaires and entomological surveys on the two most populated islands — Santa Cruz and San Cristobal. Statistical models were developed to identify the risk factors for the presence of self-reported dengue infection and Aedes aegypti, an invasive mosquito species that transmits dengue and other viral diseases.

Dengue fever is a serious disease throughout Ecuador and Latin America, with an estimated 16 million cases occurring in the Americas annually. Ryan emphasized, “The Galapagos Islands, and other island systems, present a unique challenge for vector control, given the difficulty in surveying and controlling mosquitoes across diverse landscapes separated by the ocean.”

Researchers found that the knowledge and attitudes of study participants were significantly associated with disease risk. They learned that water storage contributes to risk among island residents, but covering those containers reduces it. Because fresh water is scarce, the islands’ inhabitants store water in containers that attract mosquitoes that settle there. The study also found that human movement played an important role in dengue transmission, as people traveling between islands and traveling to the mainland may be exposed to the dengue virus and bring the disease back to their local communities.

“Our findings suggest that public health officials could develop targeted interventions that increase people’s knowledge of dengue transmission while changing their behaviors to prevent exposure to mosquito bites”, says Ryan.

This study has important implications for the formation of new health policies, providing localized information that will help reduce future outbreaks. Senior author, Anna Stewart-Ibarra of Upstate Medical University, says, “We need more research dedicated to understanding the health and well being of tens of thousands of local residents and hundreds of thousands of tourists who visit the Galápagos Islands each year, and how these health outcomes interact with the unique local ecosystems and wildlife populations.”

This is the first study of its kind in the Galapagos, and the first time household level risks of dengue have been rigorously explored off the mainland of Ecuador.

The study was published in the International Journal of Environmental and Public Health in a special issue on mosquito-borne diseases.

 

 

 

 

 

 

 

LIPPI, RYANNonlinear and delayed impacts of climate on dengue risk in Barbados: A modelling study

Rachel Lowe, Antonio Gasparrini, Cédric J. Van Meerbeeck, Catherine A. Lippi, Roché Mahon, Adrian R. Trotman, Leslie Rollock, Avery Q. J. Hinds, Sadie J. Ryan, Anna M. Stewart-Ibarra

Article first published online: 17 JUL 2018 PLOS Medicine

DOI: 10.1371/journal.pmed.1002613

ABSTRACT:

Background
Over the last 5 years (2013–2017), the Caribbean region has faced an unprecedented crisis of co-occurring epidemics of febrile illness due to arboviruses transmitted by the Aedes sp. mosquito (dengue, chikungunya, and Zika). Since 2013, the Caribbean island of Barbados has experienced 3 dengue outbreaks, 1 chikungunya outbreak, and 1 Zika fever outbreak. Prior studies have demonstrated that climate variability influences arbovirus transmission and vector population dynamics in the region, indicating the potential to develop public health interventions using climate information. The aim of this study is to quantify the nonlinear and delayed effects of climate indicators, such as drought and extreme rainfall, on dengue risk in Barbados from 1999 to 2016.

Methods and findings
Distributed lag nonlinear models (DLNMs) coupled with a hierarchal mixed-model framework were used to understand the exposure–lag–response association between dengue relative risk and key climate indicators, including the standardised precipitation index (SPI) and minimum temperature (Tmin). The model parameters were estimated in a Bayesian framework to produce probabilistic predictions of exceeding an island-specific outbreak threshold. The ability of the model to successfully detect outbreaks was assessed and compared to a baseline model, representative of standard dengue surveillance practice. Drought conditions were found to positively influence dengue relative risk at long lead times of up to 5 months, while excess rainfall increased the risk at shorter lead times between 1 and 2 months. The SPI averaged over a 6-month period (SPI-6), designed to monitor drought and extreme rainfall, better explained variations in dengue risk than monthly precipitation data measured in millimetres. Tmin was found to be a better predictor than mean and maximum temperature. Furthermore, including bidimensional exposure–lag–response functions of these indicators—rather than linear effects for individual lags—more appropriately described the climate–disease associations than traditional modelling approaches. In prediction mode, the model was successfully able to distinguish outbreaks from nonoutbreaks for most years, with an overall proportion of correct predictions (hits and correct rejections) of 86% (81%:91%) compared with 64% (58%:71%) for the baseline model. The ability of the model to predict dengue outbreaks in recent years was complicated by the lack of data on the emergence of new arboviruses, including chikungunya and Zika.

Conclusion
We present a modelling approach to infer the risk of dengue outbreaks given the cumulative effect of climate variations in the months leading up to an outbreak. By combining the dengue prediction model with climate indicators, which are routinely monitored and forecasted by the Regional Climate Centre (RCC) at the Caribbean Institute for Meteorology and Hydrology (CIMH), probabilistic dengue outlooks could be included in the Caribbean Health-Climatic Bulletin, issued on a quarterly basis to provide climate-smart decision-making guidance for Caribbean health practitioners. This flexible modelling approach could be extended to model the risk of dengue and other arboviruses in the Caribbean region.

Read the full publication at PLOS Medicine

 

 

 

 

 

Image credit: Ms. Catherine Lippi. This study was conducted with epidemiological data collected in Barbados, an island located in the Caribbean (left). Population in Barbados (middle) and elevation on the island (right) are shown, as well as the location of the two meteorological stations that provided climate data for the study.

GAINESVILLE, FL – Medical Geography researchers from the University of Florida recently participated in a study that successfully predicted dengue fever outbreaks on the Caribbean island of Barbados, using climate data. This paper is part of a special issue of PLOS MEDICINE, focusing on the impacts of climate change on health, and is a result of an unprecedented collaborative project, funded by USAID to address climate driven health impacts in the Caribbean.

The study, led by Dr. Rachel Lowe from the London School of Hygiene and Tropical Medicine, tested whether dengue outbreaks in the Caribbean island of Barbados could be predicted using weather station data for temperature and a precipitation index (Standardized Precipitation Index- SPI) used to monitor drought and extreme rainfall. Using data from June 1999 to May 2016, researchers found that the statistical model was able to successfully predict months with dengue outbreaks versus non-outbreaks in most years.
Dengue fever is spread by Aedes sp. mosquitos and infects over 350 million people each year, resulting in 25,000 deaths globally and costing households, governments, and businesses over $45 million annually. In recent decades, the disease has emerged as a major public health threat, and as many as 2 in 5 people globally are at risk of contracting dengue fever.

UF Medical Geography professor Dr. Sadie Ryan and doctoral student Ms. Catherine Lippi collaborated on models that explored the delayed effect of climate indicators like extreme rainfall and drought on future outbreaks of dengue fever on the Caribbean island.
“This study highlights the importance of keeping long term records of climate and health data so that we can learn about how a changing climate will impact our health and well-being in the future,” said Dr. Ryan.
The model found a sharp increase in disease transmission one to two months after extreme rainfall events, but a surprising result of the model was an increase in infections four to five months after a drought event. Lippi explained “During droughts, people store water in containers near their homes,” she said, “which creates the perfect habitat for Aedes mosquitos.” Senior author, Dr Stewart-Ibarra, from SUNY Upstate Medical University said she and others working on the project had heard from locals that this was a recurring trend but it wasn’t until they studied the data that they found it to be true. “Barbados is a water-scarce country. During periods of drought, people have to store water.”

The findings have been published in a paper titled Nonlinear and delayed impacts of climate on dengue risk in Barbados: A modelling study in PLOS Medicine.

The study was part of a collaboration between UF and the Caribbean Agency for Public Health, the Pan American Health Organization, the Caribbean Institute for Meteorology and Hydrology, as well as investigators from the London School of Hygiene and Tropical Medicine, SUNY Upstate Medical University, and the Escuela Superior Politecnica del Litoral of Ecuador.

The UF Geography Department is sending a large contingent to New Orleans for the 2018 meeting of the American Association of Geographers

Find out where you can see a GeoGator present their research below:

Anthropogenic change to fluvial systems, I
Geomorphology Specialty Group, Paleoenvironmental Change Specialty Group, Water Resources Specialty Group
4/10/2018
8:20 AM
Balcony K, Marriott, 4th Floor
Anthropogenic Disturbances and Sand Bar Size Variations of Coastal Plain Rivers, USA
Joann Mossa

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Geographic research on vector-borne diseases (I)
Health and Medical Geography Specialty Group, Geographic Information Science and Systems Specialty Group, Spatial Analysis and Modeling Specialty Group
4/10/2018
9:00 AM
Lafayette, Marriott, 41st Floor
Using a Network Analysis Framework to Discuss Delivery of Mosquito Abatement Services in Machala, Ecuador
Catherine A Lippi, Liang Mao, Sadie J Ryan

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Anthropogenic change to fluvial systems, II
Geomorphology Specialty Group, Paleoenvironmental Change Specialty Group, Water Resources Specialty Group
4/10/2018
11:20 AM
Room: Balcony K, Marriott, 4th Floor
Riffle-Pool Variability in the Confined Lowermost Mississippi River
Chia-Yu Wu, Joann Mossa

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Applications of Time Series Remote Sensing at the Global to Landscape Scale
4/10/2018
12:40 PM
Grand Chenier, Sheraton, 5th Floor
Examining vegetation changes in Eastern Zambia savanna landscapes from 1984-2016: an integrated approach
Hannah Herrero, Jane Southworth

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Applications of Time Series Remote Sensing at the Global to Landscape Scale
4/10/2018
1:20 PM
Grand Chenier, Sheraton, 5th Floor
Latitudes and land use: global biome shifts in greenness persistence across three decades
Jane Southworth, Sadie J Ryan, Reza Khatami, Peter Waylen, Hannah V Herrero

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Geographic research on vector-borne diseases (III)
Health and Medical Geography Specialty Group, Geographic Information Science and Systems Specialty Group, Spatial Analysis and Modeling Specialty Group
4/10/2018
1:40 PM
Lafayette, Marriott, 41st Floor
The future is uncertain: global shifts in potential distribution and seasonal risk of Aedes-transmitted viruses
Sadie Jane Ryan

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Experiential Learning in Geography Education II
Geography Education Specialty Group
4/10/2018
3:40 PM
Napoleon A1, Sheraton, 3rd Floor
Recruitment and retention in Geosciences through integrated professional and academic experiences
Heidi J. L. Lannon, Corene Matyas

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Geographic research on vector-borne diseases (IV)
Health and Medical Geography Specialty Group, Spatial Analysis and Modeling Specialty Group, Geographic Information Science and Systems Specialty Group
4/10/2018
4:00 PM
Lafayette, Marriott, 41st Floor
Precise space-time interventions on intra-urban dengue outbreaks using large-scale mobile phone tracking data
Liang Mao

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Geographic research on vector-borne diseases (V)
Health and Medical Geography Specialty Group, Geographic Information Science and Systems Specialty Group, Spatial Analysis and Modeling Specialty Group
4/10/2018
5:20 PM
Lafayette, Marriott, 41st Floor
A GIS-based Machine Learning Technique for Predicting Spatial Distribution of Phlebotomus papatasi (Diptera: Psychodidae), the Main Vectors of Zoonotic Cutaneous Leishmaniasis
Abolfazl Mollalo

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Land Change Science
Spatial Analysis and Modeling Specialty Group, Geographic Information Science and Systems Specialty Group, Remote Sensing Specialty Group
4/11/2018
8:20 AM
Maurepas, Sheraton, 3rd Floor
Operational large-area land-cover mapping: Ethiopia case study
Reza Khatami, Jane Southworth, Carly Muir

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Topics in U.S. Regional Geography
Rural Geography Specialty Group
4/11/2018
10:00 AM
Galvez, Marriott, 5th Floor
Changing Economic Geography of Southern New England’s “Tobacco Valley”: Surviving in the 21st Century
Matthew McKay

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High-Level Perspectives: NSF, Geosciences, Big Ideas, and Geography
4/11/2018
11:50 AM – 1:10 PM
Bayside C, Sheraton, 4th Floor
This session will feature comments from William Easterling, who currently serves as the Assistant Director for Geosciences at the National Science Foundation. On assignment from positions as a professor and dean at Pennsylvania State University, Easterling is the first geographer to serve in the second-highest level of officials at NSF. His comments will touch on issues related to NSF that geographers will find of interest, including federal support for basic research; major emphases for NSF, the NSF Big Ideas, and opportunities for geographers in the Directorate for Geosciences. Other geographers currently at NSF will serve as discussants and provide complementary perspectives from their divisions in the Biological Sciences and Social, Behavioral, and Economic Sciences directorates. Overall, this special session is designed to provide attendees with new perspectives regarding trends, opportunities, and issues at NSF.
Michael Binford

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Environmental Geography
4/11/2018
1:40 PM
Balcony N, Marriott, 4th Floor
Morphometric differences between megafans and alluvial fans
M. Anwar Sounny-Slitine

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Spatial Demography
Population Specialty Group
4/11/2018
6:40 PM
Studio 4, Marriott, 2nd Floor
Spatially explicit age segregation index and self-rated health of older adults in U.S. cities
Guangran Deng, Liang Mao

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Hurricanes I: Climatology/meteorology
4/12/2018
9:00 AM
Napoleon D1, Sheraton 3rd Floor
Spatial characteristics of rain fields associated with tropical cyclones landfalling over the western Gulf of Mexico and Caribbean Sea
Yao Zhou, Corene Matyas

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Geographies of health and health care V: Spatial and temporal analysis
Health and Medical Geography Specialty Group
4/12/2018
1:20 PM
Estherwood, Sheraton, 4th Floor
Understanding temporal changes of access to healthcare: an analytic framework for local factor impacts
Jue Yang, Liang Mao

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Regional evolutionary economic geography approaches to destination evolution
Recreation, Tourism, and Sport Specialty Group
4/12/2018
1:20 PM – 3:00 PM
Mid-City, Sheraton, 8th Floor
A Comparative Assessment of Tourism Development of Zambian National Parks to those in the South African Region
Brian Child

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Physical Geography Poster Session II
4/12/2018
1:20 PM – 3:00 PM
Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Accessibility to hurricane shelters for Airbnb users in Miami metropolitan area
Sanghoon Kim

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Development, Geospatial Technologies and Spatial Organization in Africa
Africa Specialty Group
4/12/2018
4:00 PM
Gallier A, Sheraton, 4th Floor
Vegetation Persistence and Change in Ethiopia as a Function of Climate
Carly Muir, Jane Southworth, Reza Khatami

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Preparing Competitive Research Grants in Biogeography
Biogeography Specialty Group, Careers and Professional Development
4/12/2018
5:20 PM – 7:00 PM
Studio 1, Marriott, 2nd Floor
This panel, organized by and for biogeographers but open to all, aims to review and discuss the ins and outs of preparing competitive research grants. Discussion topics will range from where, how, and why to successfully seek external funding for biogeographic research, NSF broader impacts and intellectual merit, lesser-known sources of funding, what to do when the big plans fall through, and much more. The panel features panelists from various career stages and areas of expertise.
Michael Binford

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Geographies of Climate Change Mitigation: Marketization, Financialization, and Decarbonization 1
Economic Geography Specialty Group, Cultural and Political Ecology Specialty Group
4/13/2018
8:40 AM
Grand Ballroom D, Sheraton, 5th Floor
Tropical Africa and the Political Economy of Climate Change Mitigation
Abe Goldman

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Landscape Speciality Group-Student Presentation Competition II
Landscape Specialty Group
4/13/2018
10:40 AM
Estherwood, Sheraton, 4th Floor
A landscape level analysis of urbanization, lake level change and community impacts in Mwanza Gulf, Tanzania
Ryan Good, Jane Southworth

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Wetlands and Meadows: Integrated Research in Geomorphology, Soils, Hydrology, Biogeography and Microclimatology
Biogeography Specialty Group, Climate Specialty Group, Geomorphology Specialty Group
4/13/2018
3:40 PM
Astor Ballroom I, Astor, 2nd Floor
Predicting the Potential Geographic Distributions of Non-Native Fishes in Florida with Climate Change
Joseph A. Andreoli

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Tropical Conservation, Development & Agriculture Short Papers
Cultural and Political Ecology Specialty Group, Geographies of Food and Agriculture Specialty Group, Graduate Student Affinity Group
4/13/2018
5:53 PM
Rampart, Sheraton, 5th Floor
Climate, Food Insecurity and Under-five Stunting in Zambia
Audrey Smith

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Tropical Conservation, Development & Agriculture Short Papers
Cultural and Political Ecology Specialty Group, Geographies of Food and Agriculture Specialty Group, Graduate Student Affinity Group
4/13/2018
5:53 PM
Rampart, Sheraton, 5th Floor
Situational Analysis of Mangalane, Mozambique in the context of a Community Based Natural Resource Management Project
Leandra Merz

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Health (Workforce) Geography
Geographic Information Science and Systems Specialty Group, Spatial Analysis and Modeling Specialty Group, Health and Medical Geography Specialty Group
4/14/2018
8:00 AM
Oak Alley, Sheraton, 4th Floor
Mapping rural–urban disparities in late-stage cancer with space-time rurality index and GWR
Liang Mao, Jue Yang, Guangran Deng

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Analyzing movement data using GIS: Lagrangian and Eulerian perspectives
Geographic Information Science and Systems Specialty Group, Spatial Analysis and Modeling Specialty Group
4/14/2018
4:00 PM – 5:40 PM
Napoleon B2, Sheraton 3rd Floor
Living la Vida T-LoCoH: Site fidelity amongst Florida wild and captive white-tailed deer (Odocoileus virginianus) during the epizootic hemorrhagic disease virus (EHDV) transmission period
Emily Dinh, Jeremy P. Orange, Jason K. Blackburn

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Analyzing space and time in the African environments
4/14/2018
5:20 PM
Grand Ballroom D, Astor, 2nd Floor
Time Series Analysis of Vegetation Change and Changes in Persistence Analyses in Umfolozi-Hluhluwe Park 2001-2016
Meshari Alenezi

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Health and Hazards
Type: Paper
4/13/2018
6:00 PM
Napoleon B2, Sheraton 3rd Floor
Effects of Brucellosis Serological Status on Physiological Conditions and Behavioral Mechanisms of Southwestern Montana Elk
Anni Yang, Jason Blackburn

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Health and Hazards
Type: Paper
4/13/2018
6:40 PM
Napoleon B2, Sheraton 3rd Floor
Inferring processes from dynamic abundance time series
Jason Blackburn

 

Aedes control – image courtesy Mr. Dany Krom

GAINESVILLE, FL – New research co-authored by UF Geography’s Dr. Sadie Ryan and Ms. Cat Lippi sheds light on the climate suitability for Aedes aegypti and Aedes albopictus mosquitos and transmission rates of Zika, chikungunya, and dengue fever.

The study, published in PLOS Neglected Tropical Diseases compares new data driven models of Zika, chikungunya, and dengue fever transmission to real world measurements of human infections caused by bites from Aedes aegypti and Ae. Albopictus mosquitoes. These models confirm that temperature is the single most important factor for predicting the rate and geographic spread of epidemics of these mosquito-borne diseases. Temperature influences transmissibility in many ways – affecting the lifespan of an individual mosquito, and determining biting frequency and the reproductive rate of the virus within the mosquito.

The collaborative research team includes experts in epidemiology, public health, ecology, mathematical modeling, and geography, and was funded by a grant from the National Science Foundation’s Ecology and Evolution of Infectious Disease program (NSF-DEB 1518681).

Phyllodactylus martini. Image courtesy Ms. Cat Lippi.
Phyllodactylus martini. Image courtesy Ms. Cat Lippi.

LIPPI – Disentangling the Influence of Urbanization and Invasion on Endemic Geckos in Tropical Biodiversity Hot Spots: A Case Study of Phyllodactylus martini (Squamata: Phyllodactylidae) along an Urban Gradient in Curaçao

Alex Dornburg, Cat Lippi, Sarah Federman, Jon A. Moore, Dan L. Warren, Teresa L. Iglesias, Matthew C. Brandley, Gregory J. Watkins-Colwell, April D. Lamb and Andrew Jones

Article first published online: OCT 2016 Bulletin of the Peabody Museum of Natural History

DOI: 10.3374/014.057.0209

ABSTRACT:

Predicting the response of endemic species to urbanization has emerged as a fundamental challenge in 21st century conservation biology. The factors that underlie population declines of reptiles are particularly nebulous, as these are often the least understood class of vertebrates in a given community. In this study, we assess correlations between feeding ecology and phenotypic traits of the Lesser Antillean endemic Dutch leaf-toed gecko, Phyllodactylus martini, along an urban gradient in the Caribbean island of Curaçao. There has been a marked decline of this species in developed habitats associated with the invasive tropical house gecko Hemidactylus mabouia. We find a correlation between aspects of locomotor morphology and prey in undeveloped habitats that is absent in developed habitats. Analyses of stomach contents further suggest that Phyllodactylus martini alters primary prey items in developed areas. However, changes in prey promote the overlap in foraging niches between Phyllodactylus martini and Hemidactylus mabouia, suggesting that direct resource competition is contributing to the decline of Phyllodactylus martini. In addition to competitive exclusion, we suggest that the urban extirpation of Phyllodactylus martini could also be attributed to a top-down control on population growth by Hemidactylus mabouia. Colonizations of walls put Phyllodactylus martini in direct contact with Hemidactylus mabouia increasing the chances for predation events, as evidenced by our observation of a predation event on a Phyllodactylus martini juvenile by an adult Hemidactylus mabuoia. In total, our results add to a growing body of literature demonstrating the threat that invasive synanthropic reptiles pose to endemics that might otherwise be able to cope with increased urbanization pressures.

Read the full publication at Bulletin of the Peabody Museum of Natural History

 

lippi

Graduate Representative

clippi@ufl.edu

@AedesLady

http://www.catlippi.com/

Member, Quantitative Disease Ecology & Conservation Lab (QDEC Lab)

State of Origin: Florida

Degree Program: PhD

Entered Program: Fall 2016

Expected Graduation: Spring 2020

Dissertation Topic: Dengue and Zika virus transmission in coastal Ecuador

Areas of interest: Ecology, Epidemiology, Entomology

Adviser: Dr. Sadie Ryan

Educational Background

  • B.S. in Wildlife Ecology and Conservation, University of Florida
  • MFAS in Fisheries and Aquatic Science, University of Florida
  • Graduate Certificate in Applied Biostatistics, University of South Florida