scholarly journals Anthropogenic and natural barriers affect genetic connectivity in an Alpine butterfly

2020 ◽  
Vol 30 (1) ◽  
pp. 114-130 ◽  
Author(s):  
Daronja Trense ◽  
Thomas L. Schmidt ◽  
Qiong Yang ◽  
Jessica Chung ◽  
Ary A. Hoffmann ◽  
...  
Keyword(s):  
Genetic Connectivity ◽  
Natural Barriers

Trans-Tasman genetic connectivity in the intertidal air-breathing slug Onchidella nigricans

2016 ◽  
Vol 562 ◽  
pp. 93-100 ◽  
Author(s):  
RA Cumming ◽  
R Nikula ◽  
HG Spencer ◽  
JM Waters
Keyword(s):  
Genetic Connectivity ◽  
Air Breathing

scholarly journals Highly restricted dispersal in habitat-forming seaweed may impede natural recovery of disturbed populations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Florentine Riquet ◽  
Christiane-Arnilda De Kuyper ◽  
Cécile Fauvelot ◽  
Laura Airoldi ◽  
Serge Planes ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Spatial Scales ◽  
Mediterranean Ecosystems ◽  
Dispersal Distance ◽  
Genetic Connectivity ◽  
Restricted Gene Flow ◽  
Isolated Populations ◽  
Natural Recovery ◽  
Limited Dispersal ◽  
Ecological Importance

AbstractCystoseira sensu lato (Class Phaeophyceae, Order Fucales, Family Sargassaceae) forests play a central role in marine Mediterranean ecosystems. Over the last decades, Cystoseira s.l. suffered from a severe loss as a result of multiple anthropogenic stressors. In particular, Gongolaria barbata has faced multiple human-induced threats, and, despite its ecological importance in structuring rocky communities and hosting a large number of species, the natural recovery of G. barbata depleted populations is uncertain. Here, we used nine microsatellite loci specifically developed for G. barbata to assess the genetic diversity of this species and its genetic connectivity among fifteen sites located in the Ionian, the Adriatic and the Black Seas. In line with strong and significant heterozygosity deficiencies across loci, likely explained by Wahlund effect, high genetic structure was observed among the three seas (ENA corrected FST = 0.355, IC = [0.283, 0.440]), with an estimated dispersal distance per generation smaller than 600 m, both in the Adriatic and Black Sea. This strong genetic structure likely results from restricted gene flow driven by geographic distances and limited dispersal abilities, along with genetic drift within isolated populations. The presence of genetically disconnected populations at small spatial scales (< 10 km) has important implications for the identification of relevant conservation and management measures for G. barbata: each population should be considered as separated evolutionary units with dedicated conservation efforts.

Natural Barriers and Internal Sources for the Reproductive Isolation in Sympatric Salmonids from the Lake–River System

2021 ◽  
Author(s):  
G. N. Markevich ◽  
D. V. Zlenko ◽  
F. N. Shkil ◽  
U. K. Schliewen ◽  
L. A. Anisimova ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
River System ◽  
Internal Sources ◽  
Natural Barriers

Multiple invasions of Bemisia argentifolii into Australia and its current genetic connectivity across space

2021 ◽  
Author(s):  
Wanaporn Wongnikong ◽  
James P. Hereward ◽  
Sharon L. van Brunschot ◽  
Gimme H. Walter
Keyword(s):  
Genetic Connectivity ◽  
Bemisia Argentifolii ◽  
Multiple Invasions

This Little Piggy Went to Market: The Xenotransplantation and Xenozoonose Debate

1999 ◽  
Vol 27 (2) ◽  
pp. 137-152 ◽  
Author(s):  
Margaret A. Clark
Keyword(s):  
New Technologies ◽  
Unintended Consequences ◽  
Human Beings ◽  
Policy Issues ◽  
Recent Letter ◽  
Ethical Concerns ◽  
Private Citizens ◽  
Clinical Risks ◽  
Natural Barriers

New technologies are changing our lives radically and quickly. New biotechnologies are moving to commercial uses faster than government regulators or private citizens can monitor. This tension manifests itself in the current debates over xenotransplantation technologies in medicine. The possibility of removing cells, tissues, and organs from animals and transplanting them into human beings is startling and unnerving. Natural immunesystem barriers between species, and even between individuals within a species, are formidable. Typically, transplantation results in violent rejection and death of the grafted organ. But despite the natural barriers to transplantation, xenotransplantation aims specifically to overcome them.In this paper, I will discuss applications of xenograft technology, which raises clinical risks, ethical concerns, and policy issues. I conclude with a set of specific recommendations. As a recent letter to the journal Nature puts it, there is a “split between those who want to get it right, and those who want to get it right now.” No one knows what all the risks, benefits, and unintended consequences of xenotransplantation will be.

Effects of Natural Barriers and Habitat on the Western Spread of Raccoon Rabies in Alabama

2008 ◽  
Vol 72 (8) ◽  
pp. 1725-1735 ◽  
Author(s):  
Wendy M. Arjo ◽  
Christine E. Fisher ◽  
James Armstrong ◽  
Frank Boyd ◽  
Dennis Slate
Keyword(s):  
Natural Barriers

Trees as natural barriers against heavy metal pollution and their role in the protection of cultural heritage

2014 ◽  
Vol 15 (3) ◽  
pp. 227-233 ◽  
Author(s):  
Katarina Kocić ◽  
Tijana Spasić ◽  
Mira Aničić Urošević ◽  
Milica Tomašević
Keyword(s):  
Heavy Metal ◽  
Cultural Heritage ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Natural Barriers ◽  
Protection Of Cultural Heritage

scholarly journals All Populations Matter: Conservation Genomics of Australia’s Iconic Purple Wattle, Acacia purpureopetala

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 139
Author(s):  
Marlien M. van der Merwe ◽  
Jia-Yee S. Yap ◽  
Peter D. Wilson ◽  
Helen T. Murphy ◽  
Andrew Ford
Keyword(s):  
Genetic Diversity ◽  
Allelic Variation ◽  
Germplasm Conservation ◽  
Snp Markers ◽  
Genomic Diversity ◽  
Ex Situ ◽  
Spatial Distance ◽  
Genetic Connectivity ◽  
Conservation Genomics ◽  
Modelling Framework

Maximising genetic diversity in conservation efforts can help to increase the chances of survival of a species amidst the turbulence of the anthropogenic age. Here, we define the distribution and extent of genomic diversity across the range of the iconic but threatened Acacia purpureopetala, a beautiful sprawling shrub with mauve flowers, restricted to a few disjunct populations in far north Queensland, Australia. Seed production is poor and germination sporadic, but the species occurs in abundance at some field sites. While several thousands of SNP markers were recovered, comparable to other Acacia species, very low levels of heterozygosity and allelic variation suggested inbreeding. Limited dispersal most likely contributed towards the high levels of divergence amongst field sites and, using a generalised dissimilarity modelling framework amongst environmental, spatial and floristic data, spatial distance was found to be the strongest factor explaining the current distribution of genetic diversity. We illustrate how population genomic data can be utilised to design a collecting strategy for a germplasm conservation collection that optimises genetic diversity. For this species, inclusion of all field sites will capture maximum genetic diversity for both in situ and ex situ conservation. Assisted cross pollination, within and between field sites and genetically structured groups, is recommended to enhance heterozygosity particularly at the most disjunct sites and further fragmentation should be discouraged to avoid loss of genetic connectivity.

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