scholarly journals Determination of potential glacial refugia and possible migration routes of Campylocentrum (Vandeae, Orchidaceae) species through the Darién Gap

2014 ◽  
Vol 84 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Marta Kolanowska
Keyword(s):  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Glacial Refugia ◽  
Niche Modeling ◽  
Migration Routes ◽  
Potential Habitats ◽  
Floristic Data

The possible glacial refugia of four <em>Campylocentrum</em> species reported from the Darién Gap are estimated based on the ecological niche modeling. The potential migration routes of the studied species are presented. The current ranges of all species designated based on the available floristic data are compared with their potential habitats distribution.

scholarly journals Glacial refugia and migration routes of the Neotropical genus Trizeuxis (Orchidaceae)

2013 ◽  
Vol 82 (3) ◽  
pp. 225-230 ◽  
Author(s):  
Marta Kolanowska
Keyword(s):  
Last Glacial Maximum ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Niche Modeling ◽  
Migration Routes ◽  
Last Glacial ◽  
Fossil Material ◽  
And Migration ◽  
The Last Glacial Maximum ◽  
The Last Glacial

The morphology and anatomy of the monotypic genus <em>Trizeuxis</em> make this taxon almost impossible to recognize in fossil material and hereby difficult object of historical geographic studies. To estimate the distribution of potential refugia during the last glacial maximum and migration routes for <em>Trizeuxis</em> the ecological niche modeling was performed. The potential niche modeling was done using maximum entropy method implemented in Maxent application based on the species presence-only observations. As input data climatic variables and the digital elevation model were used. Two models of suitable glacial habitats distribution were prepared – for the studied species and for its host. The compiled map of the suitable habitats distribution of <em>T. falcata</em> and <em>P. guajava</em> during the last glacial maximum (LGM) indicate two possible refugia for the studied orchid genus. The first one was located in the Madre de Dios region and the other one in the Mosquito Coast. The models suggest the existence of two migration routes of <em>Trizeuxis</em> species. The results indicate that the ecological niche modeling (ENM) is a useful tool for analyzing not only the possible past distribution of the species, but may be also applied to determine the migration routes of the organisms not found in the fossil material.

scholarly journals From the past to the future – glacial refugia, current distribution patterns and future potential range changes of Diodonopsis (Orchidaceae) representatives

Lankesteriana ◽  
2017 ◽  
Vol 17 (2) ◽  
Author(s):  
Marta Kolanowsca ◽  
Max Rykaczewski
Keyword(s):  
Last Glacial Maximum ◽  
Current Distribution ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Distribution Patterns ◽  
Glacial Refugia ◽  
Niche Modeling ◽  
Potential Range ◽  
The Past ◽  
Future Potential

The distribution patterns of Neotropical orchid genus Diodonopsis were analysed and the location of its glacial refugia was reconstructed. The possible changes in the coverage of suitable niches of Diodonopsis representatives were evaluated using three different scenarios. The results of ecological niche modeling indicated that the range of studied taxa is in regression since last glacial maximum. The climatic niches of three Diodonopsis species are well separated.

scholarly journals Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Gabriel Parra-Henao ◽  
Laura C. Suárez-Escudero ◽  
Sebastián González-Caro
Keyword(s):  
Chagas Disease ◽  
Sierra Nevada ◽  
Geographic Distribution ◽  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Climatic Factors ◽  
Niche Modeling ◽  
Triatomine Species ◽  
Local Risk ◽  
And Control

Ecological niche modeling of Triatominae bugs allow us to establish the local risk of transmission of the parasiteTrypanosoma cruzi,which causes Chagas disease.This information could help to guide health authority recommendations on infection monitoring, prevention, and control. In this study, we estimated the geographic distribution of triatomine species in Colombia and identified the relationship between landscape structure and climatic factors influencing their occurrence. A total of 2451 records of 4 triatomine species (Panstrongylus geniculatus,Rhodnius pallescens,R. prolixus, andTriatoma maculata) were analyzed.The variables that provided more information to explain the ecologic niche of these vectors were related to precipitation, altitude, and temperature. We found that the species with the broadest potential geographic distribution wereP. geniculatus,R. pallescens, andR. prolixus. In general, the models predicted the highest occurrence probability of these vectors in the eastern slope of the Eastern Cordillera, the southern region of the Magdalena valley, and the Sierra Nevada of Santa Marta.

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