scholarly journals Biogeographical factors determining Triatoma recurva distribution in Chihuahua, México, 2014

Biomédica ◽  
2020 ◽  
Vol 40 (3) ◽  
pp. 516-527
Author(s):  
María Elena Torres ◽  
Hugo Luis Rojas ◽  
Luis Carlos Alatorre ◽  
Luis Carlos Bravo ◽  
Mario Iván Uc ◽  
...  
Keyword(s):  
Social Factors ◽  
Ecological Niche ◽  
Strong Relationship ◽  
Maximum Temperature ◽  
Distribution Area ◽  
Ecological Niche Models ◽  
Temperature And Precipitation ◽  
Bioclimatic Variables ◽  
Biological Development ◽  
Niche Models

Introduction: Triatoma recurva is a Trypanosoma cruzi vector whose distribution and biological development are determined by factors that may influence the transmission of trypanosomiasis to humans.Objective: To identify the potential spatial distribution of Triatoma recurve, as well as social factors determining its presence.Materials and methods: We used the MaxEnt software to construct ecological niche models while bioclimatic variables (WorldClim) were derived from the monthly values of temperature and precipitation to generate biologically significant variables. The resulting cartography was interpreted as suitable areas for T. recurva presence.Results: Our results showed that the precipitation during the driest month (Bio 14), the maximum temperature during the warmest month (Bio 5), and the altitude (Alt) and mean temperature during the driest quarter (Bio 9) determined T. recurva distribution area at a higher percentage evidencing its strong relationship with domestic and surrounding structures.Conclusions. This methodology can be used in other geographical contexts to locate potential sampling sites where these triatomines occur.

scholarly journals Ecological Niche Models of Four Hard Tick Genera (Ixodidae) in Mexico

Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 649 ◽  
Author(s):  
Emilio Clarke-Crespo ◽  
Claudia N. Moreno-Arzate ◽  
Carlos A. López-González
Keyword(s):  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Distribution Patterns ◽  
Hard Tick ◽  
Ecological Niche Models ◽  
Generalist Species ◽  
Public Health Decision ◽  
Vector Borne Diseases ◽  
Temperature And Precipitation ◽  
Niche Models

Ticks are vectors of a large number of pathogens of medical and veterinary importance, and in recent years, they have participated in the rise of multiple infectious outbreaks around the world. Studies have proposed that temperature and precipitation are the main variables that limit the geographical distribution of ticks. The analysis of environmental constraints with ecological niche modeling (ENM) techniques can improve our ability to identify suitable areas for emergence events. Algorithms used in this study showed different distributional patterns for each tick genera; the environmental suitability for Amblyomma includes warm and humid localities below 1000 m above the sea level, while Ixodes is mainly associated with ecosystems with high vegetation cover. Dermacentor and Rhipicephalus genus presented wider distribution patterns; the first includes species that are well adapted to resist desiccation, whereas the latter includes generalist species that are mostly associated with domestic hosts in Mexico. Ecological niche models have proven to be useful in estimating the geographic distribution of many taxa of ticks. Despite our limited knowledge of tick’s diversity, ENM can improve our understanding of the dynamics of vector-borne diseases and can assist public health decision-making processes.

scholarly journals Ecological niche modelling to estimate the distribution of Culicoides, potential vectors of bluetongue virus in Senegal

BMC Ecology ◽  
2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Mamadou Ciss ◽  
Biram Biteye ◽  
Assane Gueye Fall ◽  
Moussa Fall ◽  
Marie Cicille Ba Gahn ◽  
...  
Keyword(s):  
Bluetongue Virus ◽  
Ecological Niche ◽  
Morbidity And Mortality ◽  
Maximum Temperature ◽  
High Morbidity ◽  
Ecological Niche Models ◽  
Niche Modelling ◽  
Boosted Regression Tree ◽  
Bioclimatic Variables ◽  
Suitable Habitats

Abstract Background Vector-borne diseases are among the leading causes of morbidity and mortality in humans and animals. In the Afrotropical region, some are transmitted by Culicoides, such as Akabane, bluetongue, epizootic haemorrhagic fever and African horse sickness viruses. Bluetongue virus infection has an enormous impact on ruminant production, due to its high morbidity and mortality rates. Methods A nationwide Culicoides trapping campaign was organized at the end of the 2012 rainy season in Senegal. A Maximum Entropy approach (MaxEnt), Boosted Regression Tree (BRT) method and Ecological Niche Factor Analysis (ENFA) were used to develop a predictive spatial model for the distribution of Culicoides, using bio-climatic variables, livestock densities and altitude. Results The altitude, maximum temperature of the warmest month, precipitation of the warmest quarter, mean temperature of the wettest quarter, temperature seasonality, precipitation of the wettest quarter and livestock density were among the most important factors to predict suitable habitats of Culicoides. Culicoides occurrences were, in most of the cases, positively correlated to precipitation variables and livestock densities; and negatively correlated to the altitude and temperature indices. The Niayes area and the Groundnut basin were the most suitable habitats predicted. Conclusion We present ecological niche models for different Culicoides species, namely C. imicola, C. oxystoma, C. enderleini and C. miombo, potential vectors of bluetongue virus, on a nationwide scale in Senegal. Through our modelling approach, we were able to determine the effect of bioclimatic variables on Culicoides habitats and were able to generate maps for the occurrence of Culicoides species. This information will be helpful in developing risk maps for disease outbreaks.

The status of the anomalepidid snake Liotyphlops albirostris and the revalidation of three taxa based on morphology and ecological niche models

2021 ◽  
Vol 304 (10) ◽  
pp. 2264-2278
Author(s):  
Camilo A. Linares‐Vargas ◽  
Wilmar Bolívar‐García ◽  
Alexandra Herrera‐Martínez ◽  
Daniel Osorio‐Domínguez ◽  
Oscar E. Ospina ◽  
...  
Keyword(s):  
Ecological Niche ◽  
Ecological Niche Models ◽  
The Status ◽  
Niche Models

Evaluating alternative data sets for ecological niche models of birds in the Andes

Ecography ◽  
2004 ◽  
Vol 27 (3) ◽  
pp. 350-360 ◽  
Author(s):  
Juan L. Parra ◽  
Catherine C. Graham ◽  
Juan F. Freile
Keyword(s):  
Ecological Niche ◽  
Data Sets ◽  
Ecological Niche Models ◽  
The Andes ◽  
Niche Models

scholarly journals Potential geographic distribution of the tiger mosquito Aedes albopictus (Skuse, 1894) (Diptera: Culicidae) in current and future conditions for Colombia

2021 ◽  
Vol 15 (5) ◽  
pp. e0008212
Author(s):  
Emmanuel Echeverry-Cárdenas ◽  
Carolina López-Castañeda ◽  
Juan D. Carvajal-Castro ◽  
Oscar Alexander Aguirre-Obando
Keyword(s):  
At Risk ◽  
Aedes Albopictus ◽  
Geographic Distribution ◽  
Ecological Niche ◽  
Ecological Niche Models ◽  
Niche Modelling ◽  
Continental Extension ◽  
Bioclimatic Variables ◽  
Valle Del Cauca ◽  
Potential Geographic Distribution

In Colombia, little is known on the distribution of the Asian mosquito Aedes albopictus, main vector of dengue, chikungunya, and Zika in Asia and Oceania. Therefore, this work sought to estimate its current and future potential geographic distribution under the Representative Concentration Paths (RCP) 2.6 and 8.5 emission scenarios by 2050 and 2070, using ecological niche models. For this, predictions were made in MaxEnt, employing occurrences of A. albopictus from their native area and South America and bioclimatic variables of these places. We found that, from their invasion of Colombia to the most recent years, A. albopictus is present in 47% of the country, in peri-urban (20%), rural (23%), and urban (57%) areas between 0 and 1800 m, with Antioquia and Valle del Cauca being the departments with most of the records. Our ecological niche modelling for the currently suggests that A. albopictus is distributed in 96% of the Colombian continental surface up to 3000 m (p < 0.001) putting at risk at least 48 million of people that could be infected by the arboviruses that this species transmits. Additionally, by 2050 and 2070, under RCP 2.6 scenario, its distribution could cover to nearly 90% of continental extension up to 3100 m (≈55 million of people at risk), while under RCP 8.5 scenario, it could decrease below 60% of continental extension, but expand upward to 3200 m (< 38 million of people at risk). These results suggest that, currently in Colombia, A. albopictus is found throughout the country and climate change could diminish eventually its area of distribution, but increase its altitudinal range. In Colombia, surveillance and vector control programs must focus their attention on this vector to avoid complications in the national public health setting.

Do Ecological Niche Models Accurately Identify Climatic Determinants of Species Ranges?

2016 ◽  
Vol 187 (4) ◽  
pp. 423-435 ◽  
Author(s):  
Christopher A. Searcy ◽  
H. Bradley Shaffer
Keyword(s):  
Ecological Niche ◽  
Ecological Niche Models ◽  
Species Ranges ◽  
Niche Models
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