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

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.

Invasion compounds an ecosystem-wide loss to afforestation in the tropical grasslands of the Shola Sky Islands

2019 ◽  
Vol 230 ◽  
pp. 141-150 ◽  
Author(s):  
M. Arasumani ◽  
Danish Khan ◽  
C.K. Vishnudas ◽  
M. Muthukumar ◽  
Milind Bunyan ◽  
...  
Keyword(s):  
Sky Islands ◽  
Tropical Grasslands

scholarly journals The role of historical factors and natural selection in the evolution of breeding systems of Oxalis alpina in the Sonoran desert ‘Sky Islands’

2010 ◽  
Vol 23 (10) ◽  
pp. 2163-2175 ◽  
Author(s):  
J. PÉREZ-ALQUICIRA ◽  
F. E. MOLINA-FREANER ◽  
D. PIÑERO ◽  
S. G. WELLER ◽  
E. MARTÍNEZ-MEYER ◽  
...  
Keyword(s):  
Natural Selection ◽  
Sonoran Desert ◽  
Breeding Systems ◽  
Sky Islands ◽  
Historical Factors

scholarly journals Biodiversity conservation in the Madrean sky islands: community homogeneity of medium and large mammals in northwestern Mexico

2018 ◽  
Vol 99 (2) ◽  
pp. 465-477 ◽  
Author(s):  
Helí Coronel-Arellano ◽  
Nalleli E Lara-Díaz ◽  
Claudia E Moreno ◽  
Carmina E Gutiérrez-González ◽  
Carlos A López-González
Keyword(s):  
Biodiversity Conservation ◽  
Sky Islands ◽  
Large Mammals ◽  
Northwestern Mexico ◽  
Madrean Sky Islands

Rumohra ponceana (Polypodiales: Dryopteridaceae): a new species from Pampean biogeographic province in Argentina

Phytotaxa ◽  
2021 ◽  
Vol 521 (1) ◽  
pp. 27-38
Author(s):  
MARCELO D. ARANA ◽  
MARÍA LUJÁN LUNA ◽  
PEDRO C. BERRUETA ◽  
MARÍA LUZ MARTINENCO ◽  
GABRIELA E. GIUDICE
Keyword(s):  
New Species ◽  
Glandular Hairs ◽  
Biogeographic Province ◽  
Narrow Endemic ◽  
A New Species

The fern Rumohra ponceana sp. nov., a narrow endemic of the Austral Pampean district, Pampean biogeographic province in Argentina, is described and illustrated. The species inhabits the Tandilia and Ventania Systems, where it grows in sunny rock crevices. The new species differs from the widespread R. adiantiformis (sensu lato) by the reduced size of all parts of the sporophyte and conspicuous capitate glandular hairs at the margins of petiole and rhizome scales. Also, there are significant differences in the architecture of the laminae, the colour and size of the spores and the ornamentation of the perispore, which is folded in R. ponceana and projects in irregular tubercles throughout its surface.

scholarly journals Ancient Geographical Gaps and Paleo-Climate Shape the Phylogeography of an Endemic Bird in the Sky Islands of Southern India

PLoS ONE ◽  
2010 ◽  
Vol 5 (10) ◽  
pp. e13321 ◽  
Author(s):  
V. V. Robin ◽  
Anindya Sinha ◽  
Uma Ramakrishnan
Keyword(s):  
Southern India ◽  
Sky Islands

scholarly journals Sky islands as foci for divergence of fig trees and their pollinators in southwest China

2020 ◽  
Vol 29 (4) ◽  
pp. 762-782 ◽  
Author(s):  
Jun‐Yin Deng ◽  
Rong‐Hua Fu ◽  
Stephen G. Compton ◽  
Mei Liu ◽  
Qin Wang ◽  
...  
Keyword(s):  
Southwest China ◽  
Sky Islands ◽  
Fig Trees
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