Phylogeographic structuring of the amphidromous shrimp Atya scabra (Crustacea, Decapoda, Atyidae) unveiled by range-wide mitochondrial DNA sampling

2019 ◽  
Vol 70 (8) ◽  
pp. 1078 ◽  
Author(s):  
Caio M. C. A. Oliveira ◽  
Mariana Terossi ◽  
Fernando L. Mantelatto
Keyword(s):  
Wide Distribution ◽  
Genetic Connectivity ◽  
Biological Traits ◽  
Long Distance ◽  
Western Atlantic ◽  
Lineage Differentiation ◽  
Genetic Groups ◽  
16S Gene ◽  
Haplotype Networks ◽  
Dna Sampling

Species with biological traits favourable to long-distance marine larval dispersal might show a phylogeographic structuring over broad regions, even when they are genetically connected within smaller scales. Here, we evaluated this hypothesis by using the widespread amphidromous shrimp Atya scabra, predicting a genetic discontinuity across biogeographical barriers throughout the Western Gulf of Mexico (WGM), Caribbean Sea (CS), south-western Atlantic (SWA) and eastern Atlantic (EA). Using cytochrome oxidase subunit 1 (COI) and 16S ribosomal unit (16S) gene fragments, we did a phylogeographic assessment and genetic characterisation with Bayesian clustering, AMOVA, haplotype networks and demographic analyses. As predicted, three discrete genetic groups, corresponding to the regions WGM, CS and EA, were uncovered by COI, as well an unpredicted SWA+CS group. The 16S fragment detected a low genetic variation, probably owing to a recent lineage differentiation, which was estimated by the COI molecular clock. We evaluated the role of the biological traits of A. scabra, as well as the consequences of Panama Isthmus closure and Pleistocene glaciation cycles in the lineage isolation of WGM and EA, as well as the genetic connectivity shown within regions and between CS and SWA. Our results highlighted that amphidromous species genetically connected over large scales should be genetically characterised in their wide distribution to provide more comprehensive systematics and to assist decision-making in biological conservation.

scholarly journals “Invasion” in the Russian Arctic: is global Climate Changea real driver? A remarkable case of two nudibranch species

2019 ◽  
Vol 29 (2) ◽  
pp. 103-113
Author(s):  
Irina A. Ekimova ◽  
Tatiana I. Antokhina ◽  
Dimitry М. Schepetov
Keyword(s):  
Barents Sea ◽  
Global Climate ◽  
Morphological Characters ◽  
Wide Distribution ◽  
Russian Arctic ◽  
Western Atlantic ◽  
Remarkable Case ◽  
The North ◽  
Haplotype Networks ◽  
New Findings

In present paper, we report the first findings of two large and conspicuous nudibranch species for Russian waters - Goniodoris nodosa and Flabellina pellucida. Both species show wide distribution in the northeastern Atlantic waters or even in the north-western Atlantic in the case of F. pellucida. The morphology of both species was studied using anatomical dissections and scanning electron microscopy. Molecular diversity was assessed by sequencing of COI marker and reconstruction of haplotype networks. In the Barents Sea, both species show minor genetic differences from their European relatives and similar morphological characters. Putative explanations of new findings for Russian Arctic are discussed.

scholarly journals Assessment of the American Flamingo distribution, trends, and important breeding areas

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244117
Author(s):  
Leopoldo Torres-Cristiani ◽  
Salima Machkour-M’Rabet ◽  
Sophie Calmé ◽  
Holger Weissenberger ◽  
Griselda Escalona-Segura
Keyword(s):  
The United States ◽  
Wide Distribution ◽  
Global Perspective ◽  
Range Extension ◽  
Technological Advancement ◽  
Science Data ◽  
Long Distance ◽  
The 1960S ◽  
American Flamingo ◽  
Phoenicopterus Ruber

The American Flamingo, Phoenicopterus ruber, is a charismatic bird distributed throughout the Caribbean, North and South America. Its wide distribution, the complexity of international monitoring due to its capacity for long-distance flying, and a focus mostly on local populations, make it difficult to understand the dynamics between sites. Here, we took advantage of the citizen eBird science project to present a global perspective on the distribution of the American Flamingo, and identify the potentially most important countries for breeding. We obtained 16,930 records for the Americas from the 1960s until October 2018, of which 9,283 could be used for our objectives. The eBird database indicated a considerable increase in the total number of records over the last decade (2010s), probably reflecting an increase in tourism facilities, research investment, technological advancement, interest in conservation, and the worldwide availability of eBird. We also observed a range extension in the Gulf of Mexico in the United States and a significant recolonization in the Florida Peninsula. The apparent range extension to the South is more likely to be linked to biases in the data; for example, in any given country the number of records might reflect either reporting efforts or actual numbers. eBird data confirmed that six countries host the main breeding colonies (Bahamas, Bonaire, Cuba, Ecuador, Mexico, and Venezuela). We suggest three additional countries as potential breeding areas for the species (Colombia, Curaçao, Turks and Caicos Islands) for which more field observations are necessary to support this possibility. This global appraisal of the distribution of the American Flamingo using citizen science data provides valuable information for national and international management and conservation programs such as the need to verify the species breeding status in areas where it appears to be expanding its distribution.

Molecular divergence between two sympatric species of Dondice (Mollusca: Nudibranchia) with distinct feeding specializations

2013 ◽  
Vol 93 (7) ◽  
pp. 1887-1893 ◽  
Author(s):  
Luis Gonzalez ◽  
Dieta Hanson ◽  
Ángel Valdés
Keyword(s):  
Feeding Habits ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Sympatric Species ◽  
Developmental Differences ◽  
Nominal Species ◽  
Western Atlantic ◽  
16S Gene ◽  
Putative Species ◽  
Gene Data

Analysis of mitochondrial (16S) and nuclear (H3) gene data using phylogenetic and population genetic approaches has revealed some genetic differences between two putative species of western Atlantic Dondice opisthobranchs that feed differentially on hydroids or on up-side-down jellies of the genus Cassiopeia. These results partially support the validity of the species Dondice parguerensis, which was described for the jelly-eating Dondice. However, phylogenetic analyses revealed that the hydroid-feeding species Dondice occidentalis and D. parguerensis are not reciprocally monophyletic and they are identical for the nuclear H3 gene. Although there are morphological and developmental differences between these two nominal species, the molecular data are inconclusive. A possible explanation is that the two putative species are in the process of speciation due to different feeding habits, resulting in the presence of genetic synapomorphies in D. parguerensis, but only in the more variable 16S gene. Because the ranges D. occidentalis and D. parguerensis overlap and there are no obvious barriers to gene flow between the two putative species, this may constitute a possible example of incipient sympatric speciation in benthic marine organisms.

scholarly journals Sporadic Genetic Connectivity among Small Insular Populations of the Rare Geoendemic Plant Caulanthus amplexicaulis var. barbarae (Santa Barbara Jewelflower)

2019 ◽  
Vol 110 (5) ◽  
pp. 587-600
Author(s):  
A Millie Burrell ◽  
Jeffrey H R Goddard ◽  
Paul J Greer ◽  
Ryan J Williams ◽  
Alan E Pepper
Keyword(s):  
Gene Flow ◽  
Genetic Connectivity ◽  
Effective Population ◽  
Evolutionary Potential ◽  
Isolated Populations ◽  
Long Distance ◽  
Population Sizes ◽  
History Of ◽  
Small Set ◽  
Nuclear Microsatellite

Abstract Globally, a small number of plants have adapted to terrestrial outcroppings of serpentine geology, which are characterized by soils with low levels of essential mineral nutrients (N, P, K, Ca, Mo) and toxic levels of heavy metals (Ni, Cr, Co). Paradoxically, many of these plants are restricted to this harsh environment. Caulanthus ampexlicaulis var. barbarae (Brassicaceae) is a rare annual plant that is strictly endemic to a small set of isolated serpentine outcrops in the coastal mountains of central California. The goals of the work presented here were to 1) determine the patterns of genetic connectivity among all known populations of C. ampexlicaulis var. barbarae, and 2) estimate contemporary effective population sizes (Ne), to inform ongoing genomic analyses of the evolutionary history of this taxon, and to provide a foundation upon which to model its future evolutionary potential and long-term viability in a changing environment. Eleven populations of this taxon were sampled, and population-genetic parameters were estimated using 11 nuclear microsatellite markers. Contemporary effective population sizes were estimated using multiple methods and found to be strikingly small (typically Ne < 10). Further, our data showed that a substantial component of genetic connectivity of this taxon is not at equilibrium, and instead showed sporadic gene flow. Several lines of evidence indicate that gene flow between isolated populations is maintained through long-distance seed dispersal (e.g., >1 km), possibly via zoochory.

scholarly journals Population genetic structure of the great star coral, Montastraea cavernosa, across the Cuban archipelago with comparisons between microsatellite and SNP markers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Alexis B. Sturm ◽  
Ryan J. Eckert ◽  
Juliett González Méndez ◽  
Patricia González-Díaz ◽  
Joshua D. Voss
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Snp Markers ◽  
Genetic Connectivity ◽  
Limited Information ◽  
Western Atlantic ◽  
Trade Offs ◽  
Significant Genetic Structure ◽  
Montastraea Cavernosa

Abstract Coral reef habitats surrounding Cuba include relatively healthy, well-developed shallow and mesophotic (30–150 m) scleractinian communities at the cross-currents of the Tropical Western Atlantic (TWA). However, Cuba’s coral communities are not immune to the declines observed throughout the TWA, and there is limited information available regarding genetic connectivity, diversity, and structure among these populations. This represents an immense gap in our understanding of coral ecology and population dynamics at both local and regional scales. To address this gap, we evaluated the population genetic structure of the coral Montastraea cavernosa across eight reef sites surrounding Cuba. Colonies were genotyped using nine microsatellite markers and > 9,000 single nucleotide polymorphism (SNP) markers generated using the 2bRAD approach to assess fine-scale genetic structure across these sites. Both the microsatellite and SNP analyses identified patterns of genetic differentiation among sample populations. While the microsatellite analyses did not identify significant genetic structure across the seven shallow M. cavernosa sampling sites, the SNP analyses revealed significant pairwise population differentiation, suggesting that differentiation is greater between eastern and western sites. This study provides insight into methodological differences between microsatellite and SNP markers including potential trade-offs between marker-specific biases, sample size, sequencing costs, and the ability to resolve subtle patterns of population genetic structure. Furthermore, this study suggests that locations in western Cuba may play important roles in this species’ regional metapopulation dynamics and therefore may merit incorporation into developing international management efforts in addition to the local management the sites receive.

scholarly journals Extensive Genetic Connectivity and Historical Persistence Are Features of Two Widespread Tree Species in the Ancient Pilbara Region of Western Australia

Genes ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 863
Author(s):  
Heidi M. Nistelberger ◽  
Rachel M. Binks ◽  
Stephen van Leeuwen ◽  
David J. Coates ◽  
Shelley L. McArthur ◽  
...  
Keyword(s):  
Western Australia ◽  
Tree Species ◽  
The Body ◽  
Genetic Connectivity ◽  
Strong Wind ◽  
Cyclonic Activity ◽  
Genetic Structuring ◽  
Long Distance ◽  
Topographic Features ◽  
History Of

Phylogeographic studies can be used as a tool to understand the evolutionary history of a landscape, including the major drivers of species distributions and diversity. Extensive research has been conducted on phylogeographic patterns of species found in northern hemisphere landscapes that were affected by glaciations, yet the body of literature for older, unaffected landscapes is still underrepresented. The Pilbara region of north-western Australia is an ancient and vast landscape that is topographically complex, consisting of plateaus, gorges, valleys, and ranges, and experiences extreme meteorological phenomena including seasonal cyclonic activity. These features are expected to influence patterns of genetic structuring throughout the landscape either by promoting or restricting the movement of pollen and seed. Whilst a growing body of literature exists for the fauna endemic to this region, less is known about the forces shaping the evolution of plant taxa. In this study we investigate the phylogeography of two iconic Pilbara tree species, the Hamersley Bloodwood (Corymbia hamersleyana) and Western Gidgee (Acacia pruinocarpa), by assessing patterns of variation and structure in several chloroplast DNA regions and nuclear microsatellite loci developed for each species. Gene flow was found to be extensive in both taxa and there was evidence of long-distance seed dispersal across the region (pollen to seed ratios of 6.67 and 2.96 for C. hamersleyana and A. pruinocarpa, respectively), which may result from flooding and strong wind gusts associated with extreme cyclonic activity. Both species possessed high levels of cpDNA genetic diversity in comparison to those from formerly glaciated landscapes (C. hamersleyana = 14 haplotypes, A. pruinocarpa = 37 haplotypes) and showed evidence of deep lineage diversification occurring from the late Miocene, a time of intensifying aridity in this landscape that appears to be a critical driver of evolution in Pilbara taxa. In contrast to another study, we did not find evidence for topographic features acting as refugia for the widely sampled C. hamersleyana.

scholarly journals Not All Larvae Stay Close to Home: Insights into Marine Population Connectivity with a Focus on the Brown Surgeonfish (Acanthurus nigrofuscus)

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
Jeff A. Eble ◽  
Luiz A. Rocha ◽  
Matthew T. Craig ◽  
Brian W. Bowen
Keyword(s):  
Resource Planning ◽  
Reef Fishes ◽  
Population Connectivity ◽  
Genetic Connectivity ◽  
Dispersal Ability ◽  
Small Range ◽  
Long Distance ◽  
Larval Recruitment ◽  
Marine Population ◽  
Acanthurus Nigrofuscus

Recent reports of localized larval recruitment in predominately small-range fishes are countered by studies that show high genetic connectivity across large oceanic distances. This discrepancy may result from the different timescales over which genetic and demographic processes operate or rather may indicate regular long-distance dispersal in some species. Here, we contribute an analysis of mtDNA cytochromebdiversity in the widely distributed Brown Surgeonfish (Acanthurus nigrofuscus;N=560), which revealed significant genetic structure only at the extremes of the range (ΦCT=0.452;P<.001). Collections from Hawaii to the Eastern Indian Ocean comprise one large, undifferentiated population. This pattern of limited genetic subdivision across reefs of the central Indo-Pacific has been observed in a number of large-range reef fishes. Conversely, small-range fishes are often deeply structured over the same area. These findings demonstrate population connectivity differences among species at biogeographic and evolutionary timescales, which likely translates into differences in dispersal ability at ecological and demographic timescales. While interspecific differences in population connectivity complicate the design of management strategies, the integration of multiscale connectivity patterns into marine resource planning will help ensure long-term ecosystem stability by preserving functionally diverse communities.

scholarly journals Unexpected patterns of genetic connectivity in Lobophyllia corymbosa (Forskål, 1775) around Sulawesi, Indonesia

2019 ◽  
Vol 20 (9) ◽  
Author(s):  
Widyastuti Umar ◽  
ASMI CITRA MALINA A.R. TASSAKKA ◽  
Paul Henry Barber ◽  
Jamaluddin Jompa
Keyword(s):  
Biological Networks ◽  
Wide Distribution ◽  
Coi Gene ◽  
Genetic Connectivity ◽  
Stepping Stones ◽  
Mitochondrial Coi ◽  
Lack Of Information ◽  
Mitochondrial Coi Gene ◽  
Genetic Pattern ◽  
Close Relationship

Abstract. Umar W, Tassakka ACMAR, Barber PH, Jompa J. 2019. Unexpected patterns of genetic connectivity in Lobophyllia corymbosa (Forskål, 1775) around Sulawesi, Indonesia. Biodiversitas 20: 2744-2749. Sulawesi is a strategic area for the biological networks of marine organisms, especially for Scleractinian corals. Sulawesi is located centrally in Indonesia and influenced by Pacific and Indian Ocean currents and shown in unique biodiversity patterns. However, research in this region is very limited. The wide distribution and lack of information on dispersal and connectivity make Lobophyllia corymbosa an exciting candidate in this study for genetic connectivity at the heart of the Indonesian Coral Triangle Area (ICTA), using Mitochondrial DNA (mtDNA) genome. Sampling sites (Palu, Mamuju, Sinjai, and Luwuk Banggai) with different coral fragments were collected from each site, DNA extracted, and mitochondrial COI gene was amplified. The results of the analysis were unexpected, and we hypothesise that the observed pattern was due to the evolution of different lineages within this region. The distance index and genetic diversity showed a close relationship between Mamuju and Luwuk Banggai, while Sinjai and Palu had a different genetic pattern. The global current patterns, complicated geography, and habitat condition could lead to such an outcome. Hard coral larvae arriving in an area might bypass a number of possible "stepping stones", resulting in unique patterns and leading to unexpected genetic connections within and between areas.

Atlantic fishes in the Mediterranean: using biological traits to assess the origin of newcomer fishes

2020 ◽  
Vol 643 ◽  
pp. 133-143
Author(s):  
J Evans ◽  
E Arndt ◽  
PJ Schembri
Keyword(s):  
Fish Species ◽  
Global Environmental Change ◽  
The Body ◽  
Individual Species ◽  
Biological Traits ◽  
Depth Range ◽  
Long Distance ◽  
Biological Trait ◽  
The Mediterranean ◽  
Cryptogenic Species

Two important facets of global environmental change are alteration of climatic regimes and the introduction of alien species. From a biogeographical perspective, these 2 processes lead to very similar results: a change in the distribution of species. Here, we considered Atlantic fish species that are recent newcomers in the Mediterranean Sea, using biological traits to assess their origin. For this purpose, we first re-evaluated all records of Atlantic fish species in the Mediterranean (n = 103) to exclude those not considered recent newcomers (n = 33). Based on faunistic data, we classified the true newcomers into 4 origin categories: alien, vagrant, range-expansion or cryptogenic. Then, we compared biological traits of species we characterised as aliens (n = 7), vagrants (n = 14) or range-expanders (n = 23). Finally, we re-assessed the origin of cryptogenic species (n = 26) using multivariate discriminant analysis, measuring the distance of individual species to the centroids of aliens, vagrants or range-expanders, allowing us to infer their probable ‘mode of origin’. The body size, depth range, temperature range, habitat and ability to undertake long-distance migration were the most important traits that could be related to alien, vagrant or range-expanding fishes. It was possible to assign 10 cryptogenic species a specific origin category with reasonable confidence, while the remaining cryptogenic species combined trait values of different origin categories. These results indicate that biological trait analysis can be coupled with faunistic data to help assess the most likely origin of a newcomer species, thus informing management decisions.

Sign in / Sign up

Export Citation Format

Share Document