scholarly journals Glacial connectivity and current population fragmentation in sky islands explain the contemporary distribution of genomic variation in two narrow‐endemic montane grasshoppers from a biodiversity hotspot

2021 ◽  
Author(s):  
Vanina Tonzo ◽  
Joaquín Ortego
Keyword(s):  
Biodiversity Hotspot ◽  
Genomic Variation ◽  
Sky Islands ◽  
Population Fragmentation ◽  
Narrow Endemic ◽  
Current Population

scholarly journals Glacial connectivity and current population fragmentation in sky-islands explain the contemporary distribution of genomic variation in two narrow-endemic montane grasshoppers from a biodiversity hotspot

2021 ◽  
Author(s):  
Vanina Tonzo ◽  
Joaquín Ortego
Keyword(s):  
Genetic Diversity ◽  
Genetic Drift ◽  
Climate Warming ◽  
Genomic Variation ◽  
Sky Islands ◽  
Environmental Niche ◽  
Population Isolation ◽  
Niche Modelling ◽  
Narrow Endemic ◽  
Analytical Approaches

AbstractAimCold-adapted biotas from mid-latitudes often show small population sizes, harbor low levels of local genetic diversity, and are highly vulnerable to extinction due to ongoing climate warming and the progressive shrink of montane and alpine ecosystems. In this study, we use a suite of analytical approaches to infer the demographic processes that have shaped contemporary patterns of genomic variation in Omocestus bolivari and O. femoralis, two narrow-endemic and red-listed Iberian grasshoppers forming highly fragmented populations in the sky island archipelago of the Baetic System.LocationSoutheastern Iberia.MethodsWe quantified genomic variation in the two focal taxa and coupled ecological niche models and a spatiotemporally explicit simulation approach based on coalescent theory to determine the relative statistical support of a suite of competing demographic scenarios representing contemporary population isolation (i.e., a predominant role of genetic drift) vs. historical connectivity and post-glacial colonization of sky islands (i.e., pulses of gene flow and genetic drift linked to Pleistocene glacial cycles).ResultsInference of spatial patterns of genetic structure, environmental niche modelling, and statistical evaluation of alternative species-specific demographic models within an Approximate Bayesian Computation framework collectively supported genetic admixture during glacial periods and postglacial colonization of sky islands, rather than long-term population isolation, as the scenario best explaining the current distribution of genomic variation in the two focal taxa. Moreover, our analyses revealed that isolation in sky islands have also led to extraordinary genetic fragmentation and contributed to reduce local levels of genetic diversity.Main conclusionsThis study exemplifies the potential of integrating genomic and environmental niche modelling data across biological and spatial replicates to determine whether organisms with similar habitat requirements have experienced concerted/idiosyncratic responses to Quaternary climatic oscillations, which can ultimately help to reach more general conclusions about the vulnerability of mountain biodiversity hotspots to ongoing climate warming.

scholarly journals Conservation Priorities in a Biodiversity Hotspot: Analysis of Narrow Endemic Plant Species in New Caledonia

PLoS ONE ◽  
2013 ◽  
Vol 8 (9) ◽  
pp. e73371 ◽  
Author(s):  
Adrien S. Wulff ◽  
Peter M. Hollingsworth ◽  
Antje Ahrends ◽  
Tanguy Jaffré ◽  
Jean-Marie Veillon ◽  
...  
Keyword(s):  
Plant Species ◽  
New Caledonia ◽  
Biodiversity Hotspot ◽  
Conservation Priorities ◽  
Endemic Plant ◽  
Hotspot Analysis ◽  
Narrow Endemic ◽  
Endemic Plant Species

Diversification in a biodiversity hotspot: genomic variation in the river frog Amietia nutti across the Ethiopian Highlands

2017 ◽  
Vol 122 (4) ◽  
pp. 801-813 ◽  
Author(s):  
Joseph D Manthey ◽  
Jacobo Reyes-Velasco ◽  
Xenia Freilich ◽  
Stéphane Boissinot
Keyword(s):  
Biodiversity Hotspot ◽  
Genomic Variation ◽  
Ethiopian Highlands

Genetic diversity of the great bustard in Iberia and Morocco: risks from current population fragmentation

2008 ◽  
Vol 10 (2) ◽  
pp. 379-390 ◽  
Author(s):  
Juan C. Alonso ◽  
Carlos A. Martín ◽  
Javier A. Alonso ◽  
Carlos Palacín ◽  
Marina Magaña ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Fragmentation ◽  
Great Bustard ◽  
Current Population

scholarly journals Australasian sky islands act as a diversity pump facilitating peripheral speciation and complex reversal from narrow endemic to widespread ecological supertramp

2013 ◽  
Vol 3 (4) ◽  
pp. 1031-1049 ◽  
Author(s):  
Emmanuel F. A. Toussaint ◽  
Katayo Sagata ◽  
Suriani Surbakti ◽  
Lars Hendrich ◽  
Michael Balke
Keyword(s):  
Sky Islands ◽  
Narrow Endemic

Evidence of a predation event on a tagged Mediterranean spearfish (Tetrapturus belone; Pisces, Istiophoridae), inferred from pop-up satellite tagging data

2020 ◽  
Vol 33 ◽  
pp. 23
Author(s):  
Danilo Malara ◽  
Pietro Battaglia ◽  
Pierpaolo Consoli ◽  
Erika Arcadi ◽  
Simonepietro Canese ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Research Group ◽  
Marine Mammals ◽  
Biodiversity Hotspot ◽  
Pelagic Species ◽  
Archival Tag ◽  
Abiotic Parameters ◽  
Predation Event ◽  
Satellite Tagging ◽  
First Time

The Strait of Messina is located at the centre of the Mediterranean Sea and is considered a biodiversity hotspot and an obligatory seasonal passage for different pelagic species such as sharks, marine mammals, and billfishes. For the first time, in the Strait of Messina, our research group tagged a Mediterranean spearfish (Tetrapturus belone) using a pop-up satellite archival tag (PSAT). The observation of abiotic parameters (depth, light, and temperature) recorded by the PSAT confirmed that the tagged specimen was predated after about nine hours. The tag was then regurgitated 14 days after the tag deployment date. The analysis of collected data seems to indicate that the predator may be an ectothermic shark, most likely the bluntnose sixgill shark (Hexanchus griseus).

EVALUATION OF PTYCHOBOTHRIDEAN CESTODES USING RANDOM AMPLIFIED POLYMORPHIC DNA (RAPD) MARKERS FROM FRESH WATER FISHES IN GODAVARI BASIN (M.S.) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
SUNITA BORDE ◽  
ASAWARI FARTADE ◽  
AMOL THOSAR ◽  
RAHUL KHAWAL
Keyword(s):  
Fresh Water ◽  
Rapd Markers ◽  
Random Amplified Polymorphic Dna ◽  
Band Pattern ◽  
Genomic Variation ◽  
Polymorphic Band ◽  
Rapd Profile ◽  
Band Size ◽  
Pcr Product ◽  
The Common

Ptychobothridean genera like Senga and Circumoncobothrium are the common parasites of fresh water fishes. The genotypic study of these parasites was taken by RAPD. The RAPD profile of these two parasites were not similar to each other as depicted by the band pattern in picture. These results suggest the presence of inter-specific polymorphism among cestode parasites of two different genera for RAPD analysis. The present study demonstrated that genetic differentiation of cestode parasites could be accomplished on the basis of genomic variation with polymorphic band pattern using RAPD. All the detected bands (PCR product) were polymorphic and band size ranged from 500-5000 bp in length. The RAPD of profiles using GBO-31, GBO-32, GBO-33, GBO-34, GBO-35 and GBO-36. Primers were able to characterize inter-specific polymorphism among the two genus ( Senga and Circumoncobothrium ). Genetic analysis suggests that Senga and Circumoncobothrium show genetic diversity with respect to RAPD patterns using all the six primers used for the present study. The genetic distance between the analyzed genuses ranged from 0.14 to 0.80. The differentiation of the two parasites on the basis of genetic markers could greatly facilitate study on the biology of these parasites.

Sign in / Sign up

Export Citation Format

Share Document