scholarly journals Reef Fish Dispersal in the Hawaiian Archipelago: Comparative Phylogeography of Three Endemic Damselfishes

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Kimberly A. Tenggardjaja ◽  
Brian W. Bowen ◽  
Giacomo Bernardi
Keyword(s):  
Genetic Structure ◽  
Reef Fish ◽  
Hawaiian Islands ◽  
Marine Species ◽  
Oceanic Islands ◽  
Dispersal Ability ◽  
Small Scale ◽  
Hawaiian Archipelago ◽  
Geographic Ranges ◽  
Significant Genetic Structure

Endemic marine species at remote oceanic islands provide opportunities to investigate the proposed correlation between range size and dispersal ability. Because these species have restricted geographic ranges, it is assumed that they have limited dispersal ability, which consequently would be reflected in high population genetic structure. To assess this relationship at a small scale and to determine if it may be related to specific reef fish families, here we employ a phylogeographic survey of three endemic Hawaiian damselfishes:Abudefduf abdominalis,Chromis ovalis, andChromis verater. Data from mitochondrial markers cytochromeband control region revealed low but significant genetic structure in all three species. Combining these results with data from a previous study onDascyllus albisellaandStegastes marginatus, all five endemic damselfish species surveyed to date show evidence of genetic structure, in contrast with other widespread reef fish species that lack structure within the Hawaiian Archipelago. Though individual patterns of connectivity varied, these five species showed a trend of limited connectivity between the atolls and low-lying Northwestern Hawaiian Islands versus the montane Main Hawaiian Islands, indicating that, at least for damselfishes, the protected reefs of the uninhabited northwest will not replenish depleted reefs in the populated Main Hawaiian Islands.

scholarly journals Genetic differentiation between inshore and offshore populations of northern shrimp (Pandalus borealis)

2021 ◽  
Author(s):  
Agneta Hansen ◽  
Jon-Ivar Westgaard ◽  
Guldborg Søvik ◽  
Tanja Hanebrekke ◽  
Einar Magnus Nilssen ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Barents Sea ◽  
General Trend ◽  
The Arctic ◽  
Small Scale ◽  
Pandalus Borealis ◽  
Mixed Heritage ◽  
Northern Shrimp ◽  
Significant Genetic Structure ◽  
Genetic Clusters

Abstract Many marine organisms have a permanent presence both inshore and offshore and spawn in multiple areas, yet their status as separate populations or stocks remain unclear. This is the situation for the northern shrimp (Pandalus borealis) around the Arctic Ocean, which in northern Norway represents an important income for a small-scale coastal fishery and a large-vessel offshore fleet. In Norwegian waters, we uncovered two distinct genetic clusters, viz. a Norwegian coastal and a Barents Sea cluster. Shrimps with a mixed heritage from the Norwegian coastal and the Barents Sea clusters, and genetically different from both, inhabit the fjords at the northernmost coast (Finnmark). Genetic structure between fjords did not display any general trend, and only the Varangerfjord in eastern Finnmark displayed significant genetic structure within the fjord. Shrimps in the Finnmark fjords differed in some degree from shrimps both in the adjacent Barents Sea and along the rest of the coast and should probably be considered a separate management unit.

scholarly journals Widespread Dispersal of the Crown-of-Thorns Sea Star,Acanthaster planci, across the Hawaiian Archipelago and Johnston Atoll

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Molly A. Timmers ◽  
Kimberly R. Andrews ◽  
Chris E. Bird ◽  
Marta J. deMaintenton ◽  
Russell E. Brainard ◽  
...  
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Larval Dispersal ◽  
Hawaiian Islands ◽  
Marine Species ◽  
Sea Star ◽  
Acanthaster Planci ◽  
The West ◽  
Geographic Population ◽  
Hawaiian Archipelago

The population structure of marine species is variable along the Hawaiian Archipelago; thus, it is important to understand dispersal and recruitment patterns for economically and ecologically important taxa to inform Ecosystem-based Management. Connectivity of the coral-eating crown-of-thorns sea star,Acanthaster planci, was examined from Johnston Atoll and 12 locations across the Hawaiian Archipelago. Sequences of mitochondrial DNA from 383 individuals were analyzed to infer patterns of gene flow among the Northwestern Hawaiian Islands (NWHIs), the main Hawaiian Islands, and Johnston Atoll. Population samples were genetically similar across the Hawaiian Archipelago with the exception of the west side of the Big Island of Hawaii, which was significantly differentiated from the majority of Hawaiian samples (pairwise , ). Although differentiated, Hawai`i West shares haplotypes with every other site across the Hawaiian Archipelago. Johnston Atoll was genetically distinct from every location (pairwise , ) except French Frigate Shoals (, ), supporting connectivity between the central NWHIs and Johnston Atoll. Taken together with the lack of geographic population structure and haplotypes shared among all populations, these results indicate widespread larval dispersal with few restrictions to gene flow along the archipelago.

scholarly journals Species Radiations in the Sea: What the Flock?

2020 ◽  
Vol 111 (1) ◽  
pp. 70-83 ◽  
Author(s):  
Brian W Bowen ◽  
Zac H Forsman ◽  
Jonathan L Whitney ◽  
Anuschka Faucci ◽  
Mykle Hoban ◽  
...  
Keyword(s):  
Marine Species ◽  
Oceanic Islands ◽  
Eastern Africa ◽  
Dispersal Ability ◽  
Species Dispersal ◽  
Marine Fauna ◽  
Marine Habitats ◽  
Pelagic Larvae ◽  
Multiple Species ◽  
Species Flocks

Abstract Species flocks are proliferations of closely-related species, usually after colonization of depauperate habitat. These radiations are abundant on oceanic islands and in ancient freshwater lakes, but rare in marine habitats. This contrast is well documented in the Hawaiian Archipelago, where terrestrial examples include the speciose silverswords (sunflower family Asteraceae), Drosophila fruit flies, and honeycreepers (passerine birds), all derived from one or a few ancestral lineages. The marine fauna of Hawaiʻi is also the product of rare colonization events, but these colonizations usually yield only one species. Dispersal ability is key to understanding this evolutionary inequity. While terrestrial fauna rarely colonize between oceanic islands, marine fauna with pelagic larvae can make this leap in every generation. An informative exception is the marine fauna that lack a pelagic larval stage. These low-dispersal species emulate a “terrestrial” mode of reproduction (brooding, viviparity, crawl-away larvae), yielding marine species flocks in scattered locations around the world. Elsewhere, aquatic species flocks are concentrated in specific geographic settings, including the ancient lakes of Baikal (Siberia) and Tanganyika (eastern Africa), and Antarctica. These locations host multiple species flocks across a broad taxonomic spectrum, indicating a unifying evolutionary phenomenon. Hence marine species flocks can be singular cases that arise due to restricted dispersal or other intrinsic features, or they can be geographically clustered, promoted by extrinsic ecological circumstances. Here, we review and contrast intrinsic cases of species flocks in individual taxa, and extrinsic cases of geological/ecological opportunity, to elucidate the processes of species radiations.

Ranking coral ecosystem "health and value" for the islands of the Hawaiian Archipelago

2007 ◽  
Vol 13 (1) ◽  
pp. 60 ◽  
Author(s):  
Paul L. Jokiel ◽  
Ku'ulei S. Rodgers
Keyword(s):  
Reef Fish ◽  
Coral Cover ◽  
Hawaiian Islands ◽  
Chelonia Mydas ◽  
Biological Indicators ◽  
Biological Information ◽  
Data Sets ◽  
Hawaiian Archipelago ◽  
Ranking Scheme ◽  
Diverse Data

An evaluation of the "health" and "value" of the Northwestern Hawaiian Islands (NWHI) in relation to the main eight Hawaiian Islands (MHI) was undertaken as part of the process for evaluating the NWHI for possible designation of this area as a National Marine Sanctuary. Biological information for the NWHI region is very limited due to its extreme Isolation, but sufficient data on five important biological Indicators were developed for both the NWHI and the MHI. These Include: reef fish biomass, reef fish endemics, total living coral cover, population of the endangered Hawaiian Monk Seal Monachus schauinsandi, and the number of female Green Sea Turtles Chelonia mydas nesting annually on each island. These diverse data sets were used in a simple Integrated scoring and ranking scheme for all the islands of the archipelago. The resulting composite scoring is essentially an index of biological integrity. The final result graphically demonstrates the value of the NWHI in a manner easily understood by the public, government decision makers and managers. Further, the contrast of the NWHI to the MHI illustrates the diminished condition of reefs close to human population within the Hawaiian Archipelago. This approach proved to be very useful in the Integration of diverse data sets.

scholarly journals Eddies in the Hawaiian Archipelago Region: Formation, Characterization, and Potential Implications on Larval Retention of Reef Fish

2020 ◽  
Vol 125 (5) ◽  
Author(s):  
David Lindo‐Atichati ◽  
Yanli Jia ◽  
Johanna L. K. Wren ◽  
Andreas Antoniades ◽  
Donald R. Kobayashi
Keyword(s):  
Reef Fish ◽  
Hawaiian Archipelago ◽  
Larval Retention

scholarly journals Impact of cyclones on hard coral and metapopulation structure, connectivity and genetic diversity of coral reef fish

Coral Reefs ◽  
2021 ◽  
Author(s):  
Gabriele Gerlach ◽  
Philipp Kraemer ◽  
Peggy Weist ◽  
Laura Eickelmann ◽  
Michael J. Kingsford
Keyword(s):  
Genetic Diversity ◽  
Coral Reef ◽  
Genetic Structure ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Population Genetic Study ◽  
Hard Coral ◽  
Great Loss ◽  
Metapopulation Structure ◽  
The Impact

AbstractCyclones have one of the greatest effects on the biodiversity of coral reefs and the associated species. But it is unknown how stochastic alterations in habitat structure influence metapopulation structure, connectivity and genetic diversity. From 1993 to 2018, the reefs of the Capricorn Bunker Reef group in the southern part of the Great Barrier Reef were impacted by three tropical cyclones including cyclone Hamish (2009, category 5). This resulted in substantial loss of live habitat-forming coral and coral reef fish communities. Within 6–8 years after cyclones had devastated, live hard corals recovered by 50–60%. We show the relationship between hard coral cover and the abundance of the neon damselfish (Pomacentrus coelestis), the first fish colonizing destroyed reefs. We present the first long-term (2008–2015 years corresponding to 16–24 generations of P. coelestis) population genetic study to understand the impact of cyclones on the meta-population structure, connectivity and genetic diversity of the neon damselfish. After the cyclone, we observed the largest change in the genetic structure at reef populations compared to other years. Simultaneously, allelic richness of genetic microsatellite markers dropped indicating a great loss of genetic diversity, which increased again in subsequent years. Over years, metapopulation dynamics were characterized by high connectivity among fish populations associated with the Capricorn Bunker reefs (2200 km2); however, despite high exchange, genetic patchiness was observed with annual strong genetic divergence between populations among reefs. Some broad similarities in the genetic structure in 2015 could be explained by dispersal from a source reef and the related expansion of local populations. This study has shown that alternating cyclone-driven changes and subsequent recovery phases of coral habitat can greatly influence patterns of reef fish connectivity. The frequency of disturbances determines abundance of fish and genetic diversity within species.

scholarly journals Deep genetic structure at a small spatial scale in the endangered land snail Xerocrassa montserratensis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cristina Català ◽  
Vicenç Bros ◽  
Xavier Castelltort ◽  
Xavier Santos ◽  
Marta Pascual
Keyword(s):  
Genetic Structure ◽  
Land Snail ◽  
Snail Species ◽  
Small Spatial Scale ◽  
Geographic Ranges ◽  
Genetic Groups ◽  
Species Of Conservation Concern ◽  
Conservation Actions ◽  
Conservation Concern ◽  
Single Locality

AbstractSpecies with small geographic ranges do not tend to have a high genetic structure, but some land snail species seem to be an exception. Xerocrassa montserratensis, an endangered land snail endemic to Catalonia (northeastern Iberian Peninsula), is an excellent model to study the processes affecting the phylogeography of specialized species of conservation concern. This species is restricted to xerophilous stony slopes and occurs within a small and fragmented area of ca. 500 km2. We sequenced the COI barcode region of 152 individuals from eight sites covering the entire range of the species. We found four genetic groups mostly coincident with their geographic distribution: a central ancestral group containing shared haplotypes among five localities and three groups restricted to a single locality each. Two of these derived groups were geographically and genetically isolated, while the third and most differentiated group was not geographically isolated. Geomorphologic and paleoclimatic processes during the Pleistocene can explain the divergence found between populations of this low dispersal species with historical fragmentation and secondary contacts. Nonetheless, recent passive large dispersal through streams was also detected in the central group. Overall, our study uncovered four evolutionary units, partially matching morphologically described subspecies, which should be considered in future conservation actions.

Sign in / Sign up

Export Citation Format

Share Document