Within-river genetic connectivity patterns reflect contrasting geomorphology

2015 ◽  
Vol 42 (12) ◽  
pp. 2452-2460 ◽  
Author(s):  
Jonathan M. Waters ◽  
Dave Craw ◽  
Christopher P. Burridge ◽  
Martyn Kennedy ◽  
Tania M. King ◽  
...  
Keyword(s):  
Genetic Connectivity ◽  
Connectivity Patterns

scholarly journals The role of cryptic dispersal in shaping connectivity patterns of marine populations in a changing world

2017 ◽  
Vol 98 (4) ◽  
pp. 647-655 ◽  
Author(s):  
Andrew A. David ◽  
Benjamin R. Loveday
Keyword(s):  
Marine Species ◽  
Short Review ◽  
Marine Ecology ◽  
Larval Transport ◽  
Genetic Connectivity ◽  
World Population ◽  
Dispersal Patterns ◽  
Connectivity Patterns ◽  
Integrated Methods ◽  
Evolutionary Consequences

Genetic connectivity directly shapes the demographic profile of marine species, and has become one of the most intensely researched areas in marine ecology. More importantly, it has changed the way we design and describe Marine Protected Areas across the world. Population genetics is the preferred tool when measuring connectivity patterns, however, these methods often assume that dispersal patterns are (1) natural and (2) follow traditional metapopulation models. In this short review, we formally introduce the phenomenon of cryptic dispersal, where multiple introductory events can undermine these assumptions, resulting in grossly inaccurate connectivity estimates. We also discuss the evolutionary consequences of cryptic dispersal and advocate for a cross-disciplinary approach that incorporates larval transport models into population genetic studies to provide a level of oceanographic realism that will result in more accurate estimates of dispersal. As globalized trade continues to expand, the rate of anthropogenic movement of marine organisms is also expected to increase and as such, integrated methods will be required to meet the inevitable conservation challenges that will arise from it.

scholarly journals Genetic connectivity of the metapopulation of the coral Pocillopora verrucosa (Scleractinia: Pocilloporidae) in multi-use marine protected areas of the Gulf of California, and management implications

2021 ◽  
Vol 69 (4) ◽  
pp. 1164-1178
Author(s):  
Fernando Aranceta-Garza ◽  
Pedro Cruz-Hernández ◽  
Héctor Reyes-Bonilla ◽  
Eduardo F. Balart
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Gulf Of California ◽  
Dispersal Distance ◽  
Assignment Test ◽  
Genetic Connectivity ◽  
Anthropogenic Factors ◽  
Long Distance ◽  
Connectivity Patterns ◽  
Pocillopora Verrucosa

Introduction: Estimates of contemporary connectivity of the broadcast spawning coral Pocillopora verrucosa between multi-use marine protected areas (MUMPAs) are required to assess MUMPA effectiveness and their ability to enhance resilience against disturbances. Objective: To determine the genetic structure and connectivity patterns between P. verrucosa demes inside the Gulf of California and evaluate the role and effectiveness of established MUMPAS in their protection and resilience. Methods: We assessed P. verrucosa connectivity along its peninsular range (∼350 km), including five locations and three MUMPAs in the Gulf of California using six microsatellite genetic markers. Results: Population structure was significant (FST = 0.108***) when demes included clonal replicates; however, when these clones were removed from the analysis, the sexual individuals comprised a metapopulation panmixia (FST = 0.0007 NS). To further understand connectivity patterns, an assignment test was carried out which identified ten recent between-deme migrants with a mean dispersal distance of 116.6 km (± 80.5 SE). No long-distance dispersal was detected. These results highlight the ecological importance of the Bahía de La Paz region, including Archipiélago de Espíritu Santo MUMPA. This region, located at the center of the species peninsular range, exports larva to downstream sink demes such as the Loreto (northwardly) and Cabo Pulmo (southwardly) MUMPAs. Of importance, inter-MUMPA spacing was larger than the mean larval dispersal by ~56 km, suggesting thar the designation of intermediate ‘no-take’ zones would enhance short-distance connectivity. Conclusion: This study contributes as a baseline for policymakers and authorities to provide robust strategies for coral ecosystem protection and suggest that protection efforts must be increased towards peninsular intermediate reefs to promote metapopulation resilience from natural and anthropogenic factors.

Genetic Connectivity Patterns of CoralsPocillopora damicornisandPorites panamensis(Anthozoa: Scleractinia) Along the West Coast of Mexico

2012 ◽  
Vol 66 (1) ◽  
pp. 43-61 ◽  
Author(s):  
David A. Paz-García ◽  
Héctor E. Chávez-Romo ◽  
Francisco Correa-Sandoval ◽  
Héctor Reyes-Bonilla ◽  
Andrés López-Pérez ◽  
...  
Keyword(s):  
West Coast ◽  
Genetic Connectivity ◽  
The West ◽  
Connectivity Patterns

Understanding the effectiveness of marine protected areas using genetic connectivity patterns and Lagrangian simulations

2013 ◽  
Vol 19 (12) ◽  
pp. 1531-1542 ◽  
Author(s):  
José Martin Pujolar ◽  
Marcello Schiavina ◽  
Antonio Di Franco ◽  
Paco Melià ◽  
Paolo Guidetti ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Genetic Connectivity ◽  
Connectivity Patterns

Genetic connectivity patterns in an endangered species: The dusky grouper (Epinephelus marginatus)

2011 ◽  
Vol 401 (1-2) ◽  
pp. 126-133 ◽  
Author(s):  
Celia Schunter ◽  
Josep Carreras-Carbonell ◽  
Serge Planes ◽  
Enric Sala ◽  
Enric Ballesteros ◽  
...  
Keyword(s):  
Endangered Species ◽  
Genetic Connectivity ◽  
Connectivity Patterns ◽  
Dusky Grouper

scholarly journals Genetic Connectivity of Seamount Populations of Bluenose Warehou (Hyperoglyphe antarctica)

2021 ◽  
Vol 8 ◽  
Author(s):  
Stephanie M. Heyworth ◽  
James B. Bell ◽  
Christopher M. Wade ◽  
Geórgenes Cavalcante ◽  
Nicholas Robinson ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Single Species ◽  
Population Connectivity ◽  
Population Diversity ◽  
Genetic Connectivity ◽  
Effective Management ◽  
Genetic Population ◽  
Connectivity Patterns ◽  
Management Plans ◽  
Population Sustainability

Quantifying the level of population connectivity within and between geographically separated single-species deep-water fisheries stocks will be vital for designing effective management plans to preserve such populations. Despite this, stock structure in many fisheries is still poorly described and, at best, subject to precautionary management. Here we use rapidly evolving mitochondrial genes and microsatellite markers to investigate population connectivity patterns in commercially targeted Hyperoglyphe antarctica populations between four seamounts within the Tristan da Cunha Exclusive Economic Zone (EEZ). We find little evidence of population genetic structure between fished populations, with both mtDNA and microsatellite markers showing that there is low genetic population diversity (reflecting substantial gene flow) across the four seamounts. We also find little genetic differentiation between H. antarctica across the wider Southern Hemisphere. Such results support the role for coordinated management of all four populations across the seamounts, and potentially including stocks associated with Australia and New Zealand, with expansion of the fishery clearly having the potential to substantially impact the source of recruits and therefore wider population sustainability.

scholarly journals Fine-grained habitat-associated genetic connectivity in an admixed population of mussels in the small isolated Kerguelen Islands

2017 ◽  
Author(s):  
Christelle Fraïsse ◽  
Anne Haguenauer ◽  
Karin Gérard ◽  
Alexandra Anh-Thu Weber ◽  
Nicolas Bierne ◽  
...  
Keyword(s):  
Spatial Distance ◽  
Genetic Connectivity ◽  
Sequencing Data ◽  
Kerguelen Islands ◽  
Fine Grained ◽  
Ideal System ◽  
Connectivity Patterns ◽  
Environmental Variations ◽  
Admixed Population ◽  
Northern Species

AbstractReticulated evolution -i.e. secondary introgression / admixture between sister taxa-is increasingly recognized as playing a key role in structuring infra-specific genetic variation and revealing cryptic genetic connectivity patterns. When admixture zones coincide with ecological transitions, the connectivity patterns often follow environmental variations better than distance and introgression clines may easily be confounded with local adaptation signatures. The Kerguelen mussels is an ideal system to investigate the potential role of admixture in enhancing micro-geographic structure, as they inhabit a small isolated island in the Southern Ocean characterized by a highly heterogeneous environment. Furthermore, genomic reticulation between Northern species (M. edulis, M. galloprovincialis and M. trossulus) and Southern species (M. platensis: South America and the Kerguelen Islands; and M. planulatus: Australasia) has been suspected. Here, we extended a previous analysis by using targeted-sequencing data (51,878 SNPs) across the three Northern species and the Kerguelen population. Spatial structure in the Kerguelen was then analyzed with a panel of 33 SNPs, including SNPs that were more differentiated than the genomic average between Northern species (i.e., ancestry-informative SNPs). We first showed that the Kerguelen lineage splitted very shortly after M. edulis and M. galloprovincialis initiated speciation, and it subsequently experienced admixture with the three Northern taxa. We then demonstrated that the Kerguelen mussels were significantly differentiated over small spatial distance, and that this local genetic structure was associated with environmental variations and mostly revealed by ancestry-informative markers. Simulations of admixture in the island highlight that genetic-environment associations can be better explained by introgression clines between heterogeneously differentiated genomes than by adaptation.

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
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