scholarly journals Climate and Competition Shape Species' Borders: A Study of the Panamint (Crotalus stephensi) and Speckled (Crotalus mitchellii) Rattlesnakes

ISRN Zoology ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
A. Michelle Lawing ◽  
Jesse M. Meik ◽  
P. David Polly
Keyword(s):  
Ecological Niche ◽  
Climatic Factors ◽  
Interspecific Interactions ◽  
Ecological Niche Modelling ◽  
Suitable Habitat ◽  
Niche Modelling ◽  
Closely Related Species ◽  
Crotalus Mitchellii ◽  
Suitable Habitats ◽  
The Last Glacial

We used ecological niche modelling to study the relative roles of climate and interspecific interactions in defining the parapatric contact between closely related species (Crotalus mitchellii and C. stephensi) and to predict refugia during the last glacial maximum. The modelled suitable habitat for C. stephensi correctly predicts the existing parapatric border between it and C. mitchellii, suggesting that C. stephensi's range at the border is limited by climatic factors. In contrast, the suitable habitat for C. mitchellii does not correctly predict the existing parapatric boundary; rather the suitable habitat of this species extends into the range of C. stephensi, suggesting the latter species, not climatic factors, limit the range of C. mitchellii. Modelled refugia of C. stephensi are much smaller than modern suitable habitat and are partially situated at the current parapatric border, whereas the refugia of C. mitchellii are similar to its current suitable habitat, though also shifted to the south. Ecological niche modelling appears to be a useful tool for studying the interplay between climate and competition in determining boundaries between parapatric species. It also appears to be useful for predicting past suitable habitats of species, because predicted refugia are congruent with independent estimates from molecular phylogeography.

scholarly journals Little hope for the polyploid endemic Pyrenean Larkspur (Delphinium montanum): evidences from population genomics and Ecological Niche Modelling

2021 ◽  
Author(s):  
Pascaline Salvado ◽  
Pere Aymerich Boixader ◽  
Josep Parera ◽  
Albert Vila Bonfill ◽  
Maria Martin ◽  
...  
Keyword(s):  
Population Structure ◽  
Ecological Niche ◽  
Population Genomics ◽  
Diploid Species ◽  
Ecological Niche Modelling ◽  
High Mountain ◽  
Suitable Habitat ◽  
Sky Islands ◽  
Niche Modelling ◽  
Ecological Requirements

Species endemic to restricted geographical ranges represent a particular conservation issue, be it for their heritage interest. In a context of global change, this is particularly the case for plants which belong to high-mountain ecosystems and, because of their ecological requirements, are doomed to survive or disappear on their "sky islands". The Pyrenean Larkspur (Delphinium montanum, Ranunculaceae) is endemic to the Eastern part of the Pyrenees (France and Spain). It is now only observable at a dozen of localities and some populations show signs of decline, such as a recurrent lack of flowering. Implementing population genomic approach (e.g. RAD-seq like) is particularly useful to understand genomic patterns of diversity and differentiation in order to provide recommendations in term of conservation. However, it remains challenging for species such as D. montanum that are autotetraploid with a large genome size (1C-value > 10 pg) as most methods currently available were developed for diploid species. A Bayesian framework able to call genotypes with uncertainty allowed us to assess genetic diversity and population structure in this system. Our results show evidence for inbreeding (mean GIS = 0.361) within all the populations and substantial population structure (mean GST = 0.403) at the metapopulation level. In addition to a lack of connectivity between populations, spatial projections of Ecological Niche Modelling analyses under different climatic scenarios predict a dramatic decrease of suitable habitat for D. montanum in the future. Based on these results, we discuss the relevance and feasibility of different conservation measures.

scholarly journals THE DYNAMICS OF HISTORICAL AND RECENT RANGE SHIFTS IN THE RUFFED GROUSE (Bonasa umbellus)

2020 ◽  
Author(s):  
Utku Perktaş
Keyword(s):  
Ecological Niche ◽  
Demographic History ◽  
Ecological Niche Modelling ◽  
Ruffed Grouse ◽  
Bonasa Umbellus ◽  
Effective Population ◽  
Niche Modelling ◽  
Range Dynamics ◽  
The Last Glacial Maximum ◽  
The Last Glacial

ABSTRACTClimate variability is the most important force affecting distributional range dynamics of common and widespread species with important impacts on biogeographic patterns. This study integrates phylogeography with distributional analyses to understand the demographic history and range dynamics of a widespread bird species, the Ruffed Grouse (Bonasa umbellus), under several climate change scenarios. For this, I used an ecological niche modelling approach, together with Bayesian based phylogeographic analysis and landscape genetics, to develop robust inferences regarding this species’ demographic history and range dynamics. The model’s predictions were mostly congruent with the present distribution of the Ruffed Grouse. However, under the Last Glacial Maximum bioclimatic conditions, the model predicted a substantially narrower distribution than the present. The predictions for the Last Glacial Maximum also showed three allopatric refugia in south-eastern and west-coast North America, and a cryptic refugium in Alaska. The prediction for the Last Interglacial showed two separate distributions to the west and east of the Rocky Mountains. In addition, the predictions for 2050 and 2070 indicated that the Ruffed Grouse will most likely show slight range shifts to the north and will become more widely distributed than in the past or present. At present, effective population connectivity throughout North America was weakly positively correlated with Fst values. That is, the species’ distribution range showed a weak isolation-by-resistance pattern. The extended Bayesian Skyline Plot analysis, which provided good resolution of the effective population size changes over the Ruffed Grouse’s history, was mostly congruent with ecological niche modelling predictions for this species. This study offers the first investigation of the late-Quaternary history of the Ruffed Grouse based on ecological niche modelling and Bayesian based demographic analysis. The species’ present genetic structure is significantly affected by past climate changes, particularly during the last 130 kybp. That is, this study offers valuable evidence of the ‘expansion–contraction’ model of North America’s Pleistocene biogeography.

scholarly journals Phylogeography of Arabidopsis halleri (Brassicaceae) in mountain regions of Central Europe inferred from cpDNA variation and ecological niche modelling

2015 ◽  
Author(s):  
Pawel Wasowicz ◽  
Maxime Pauwels ◽  
Andrzej Pasierbinski ◽  
Ewa M Przedpelska-Wasowicz ◽  
Alicja A. Babst-Kostecka ◽  
...  
Keyword(s):  
Central Europe ◽  
Last Glacial Maximum ◽  
Ecological Niche ◽  
Ecological Niche Modelling ◽  
Glacial Maximum ◽  
Phylogeographic Structure ◽  
Niche Modelling ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

The present study aimed to investigate phylogeographical patterns present within A. halleri in Central Europe, to propose hypotheses explaining the emergence of these patterns and to formulate hypotheses on the formation of the present day range of A. halleri in the region. 1281 accessions sampled from 52 populations within the investigated area were used in the study of genetic variation based on chloroplast DNA. Over 500 high quality species occurrence records were used in ecological niche modelling experiments. We evidenced the presence of a clear phylogeographic structure within A. halleri in Central Europe. Our results suggest that the species might have not survived the last glacial maximum in the Carpathians and Sudetes and that its range during the last glacial maximum might have consisted of at least two major parts: (1) a northern refugium consisting of vast refugial areas north and northeast of the Alps and (2) a southern refugium located in the Dinaric Alps and Balkan Mts. We postulate that the Sudetes and Western Carpathians were colonised mainly by plants originating from the northern refugium, whereas populations from the Eastern Carpathians originate from southern refugium. We also discuss our results in relation to the problematic taxonomy of the species.

scholarly journals Phylogeography of Arabidopsis halleri (Brassicaceae) in mountain regions of Central Europe inferred from cpDNA variation and ecological niche modelling

2015 ◽  
Author(s):  
Pawel Wasowicz ◽  
Maxime Pauwels ◽  
Andrzej Pasierbinski ◽  
Ewa M Przedpelska-Wasowicz ◽  
Alicja A. Babst-Kostecka ◽  
...  
Keyword(s):  
Central Europe ◽  
Last Glacial Maximum ◽  
Ecological Niche ◽  
Ecological Niche Modelling ◽  
Glacial Maximum ◽  
Phylogeographic Structure ◽  
Niche Modelling ◽  
Last Glacial ◽  
The Last Glacial Maximum ◽  
The Last Glacial

The present study aimed to investigate phylogeographical patterns present within A. halleri in Central Europe, to propose hypotheses explaining the emergence of these patterns and to formulate hypotheses on the formation of the present day range of A. halleri in the region. 1281 accessions sampled from 52 populations within the investigated area were used in the study of genetic variation based on chloroplast DNA. Over 500 high quality species occurrence records were used in ecological niche modelling experiments. We evidenced the presence of a clear phylogeographic structure within A. halleri in Central Europe. Our results suggest that the species might have not survived the last glacial maximum in the Carpathians and Sudetes and that its range during the last glacial maximum might have consisted of at least two major parts: (1) a northern refugium consisting of vast refugial areas north and northeast of the Alps and (2) a southern refugium located in the Dinaric Alps and Balkan Mts. We postulate that the Sudetes and Western Carpathians were colonised mainly by plants originating from the northern refugium, whereas populations from the Eastern Carpathians originate from southern refugium. We also discuss our results in relation to the problematic taxonomy of the species.

Specification of SOA Components and Web Services to Integrate Ecological Niche Modelling Systems and IABIN-PTN

2009 ◽  
Author(s):  
Renata L Stange ◽  
Fabiana S Santana ◽  
Bruna Buani ◽  
Pedro L. P Correa ◽  
Antonio M Saraiva
Keyword(s):  
Web Services ◽  
Ecological Niche ◽  
Ecological Niche Modelling ◽  
Niche Modelling

scholarly journals Genetic diversity and ecological niche modelling of the restrictedRecordia reitzii(Verbenaceae) from southern Brazilian Atlantic forest

2014 ◽  
Vol 176 (3) ◽  
pp. 332-348 ◽  
Author(s):  
Verônica A. Thode ◽  
Gustavo A. Silva-Arias ◽  
Caroline Turchetto ◽  
Ana Lúcia A. Segatto ◽  
Geraldo Mäder ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Atlantic Forest ◽  
Ecological Niche ◽  
Ecological Niche Modelling ◽  
Brazilian Atlantic Forest ◽  
Niche Modelling
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