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40 results for “coastal evolution”
Data for: Pleistocene coastal evolution of the Makran subduction zone
<p>This dataset contain a set of field pictures made along the coast of the western Makran subduction zone, near the region of Chabahar.<br> A youtube video (diaporama) presents (some of) these figures in their context. <a href="https://www.youtube.com/watch?v=VRxXaCPRoJk&t=1s">https://www.youtube.com/watch?v=VRxXaCPRoJk&t=1s</a></p> <p>The field pictures are a visual support for the publication mentioned in the title.</p> <p>The dataset comes in the form of many field pictures classified in themes, their legends in text files and geolocalisation in a .kmz file.<br> BB and HB are bay beach and headland beach pictures, respectively<br> Pictures of the different marine terraces areas visited are labelled as follow:<br> CH - Chabahar marine terraces<br> GU - Gurdim marine terrace<br> JA - Jask marine terrace<br> KO - Konarak marine terraces<br> LI - Lipar marine terraces<br> PA - Pasabander marine terraces<br> RA - Ramin marine terraces<br> TA - Tang marine terraces</p> <p>M pictures are from tertiary marl bedrock outcrops along the coast</p> <p>Pictures B, C, D, E, F, G, and I are from major normal faults at Chabahar headland. A figure shows their localisation.</p> <p>Finally, many pictures illustrate the different sedimentary sections described and studied in the paper.</p>
Data for: Holocene sedimentary record and coastal evolution in the Makran subduction zone (Iran)
<p>The data comes from the study of Holocene beaches from the Iranian Makran. More exactly, the beaches in Pozm bay, Chabahar bay and the longitudinal beach west of the village of Beris. The data contain field pictures and their legends, results and analytical details of radiocarbon dating, SEM secondary electron images of the analysed shells and the results and analytical details of optically stimulated luminescence dating (OSL).<br> The data is published in support for the paper mentioned in the title.</p> <p>A to D are field pictures and legends of:<br> A - Pozm bay field pictures<br> B - Chabahar bay field pictures<br> C - Beris beach field pictures<br> D - Observed current depositional settings</p> <p>E - Radiocarbon dating results and analytical supplementary information<br> F - Secondary electrons SEM images of the analysed shells</p> <p>G - OSL dating results and analytical supplementary information</p> <p>Radiocarbon analytical details are provided, together with XRD analysis of the Aragonitic shells, SEM secondary electron images of analysed shells and calibration details. Method details are in the paper.</p> <p>OSL results are provided with the analytical details, such as: Environmental dose parameters, OSL raw measurements (out of the machine), OSL Histograms and Dose-Recovery tests. Method details are in the paper.</p>
Figure 9. Dipole eddy evolution from August 7 in Influence of circulation processes on cyanobacteria bloom and phytoplankton succession in the Baltic Sea coastal area
Figure 9. Dipole eddy evolution from August 7 to August 9, 2018 in the suspended matter field from OLCI Sentinel-3A data for August 7 (a) and August 8, 2018 (b) and MSI Sentinel-2B data for August 9, 2008 (c) according Krayushkin et al. (2018).
Fig. 11 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 11. (a) The main axes of Quaternary tectonics in Brazil (gray lines) (according to Saadi, 1993) and areas of coincident distributional rages of several species in both isolated coastal rivers and adjacent drainages. (b) The northeastern margin of Brazil, including the Parnaíba, São Francisco and adjacent coastal rivers (c) The Southern most Brazil, encompassing the Uruguay and surroundings coastal rivers as well as the headwaters of the Paranapanema, Ivaí, Iguacú and Ribeira de Iguape. (d) The area encompassed by the CRSB, in southeastern Brazil, including the coastal rivers and the adjacent upper Tietê and upper Iguaçu.
Fig. 4 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 4. Geographic location of the Brazilian Atlantic continental margin and of the coastal drainages of eastern Brazil (shaded area) and areas showed in figures 6, 7 and 8 (modified from Hearn et al., 2000).
Fig. 9 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 9. Cladograms of taxa and areas showing the sister-group relationships included in Pattern A. a) Catfishes of the family Trichomycteridae. b) Catfishes of the family Doradidae. The degree of inclusiveness of this pattern suggests the most ancient cladogenetic event that is still recognized in respect to the ichthyofauna of the Brazilian coastal rivers.
Fig. 7 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 7. (a) Map of northeastern segment of Southeastern Brazilian coast showing the complex system of Pre-Cambrian and Mesozoic continental rifts controlling drainage and topography. (b) Detail of the straight course of the rio Paraíba do Sul Rift Valley produced from a digital elevation model by radar interferometry (NASA, The Shuttle Radar Topography Mission).
Fig. 3 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 3. Rivers and uplifts of Atlantic South America. A) break-up uplifts (megadomes) and associated principal rifts. Megadomes: Guyana/Guinea (1), NE Brazil/Niger (2), Mantiqueira/Angola (3), Uruguay/SW Africa (4), Somuncurá (5) and Deseado (6). Break-up rifts: Tacutu (I), Foz do Amazonas (II), Reconcavo Tucano-Jatobá (III) and Taubaté (IV). B) detail of the uplift from the Southeastern Brazil (from Cox, 1989 and Potter, 1997).
Fig. 2 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin
Fig. 2. The South American Plate and its major tectono-sedimentary domains (from Milani & Thomaz-Filho, 2000).
An Analysis of the Coastal Evolution of the South Coast of County Wexford and the Impact of Wind
<p>An assessment of coastal change along the south coast of County Wexford in conjunction with the GSI using orthophoto sets from 3 different years spanning between 2014 and 2019 (2014, 2016, and 2019) using the ArcGIS add-in tool DSAS to calculate the changes. The study area was the coastline between Carnsore Point and Hook Head.</p> <p>The key findings of the study were that between 2014 and 2019, just under 59% of the coastline was eroding and the average rate of erosion of these areas was 46 cm per year. </p> <p>Wind speed and direction data for County Wexford provided by the GSI was used to observe the correlation between wind speed, mean height of waves (SWH) and coastal erosion. There was a strong correlation between wind speed and mean wave height in both periods 2014-2016 and 2016-2019. Average wind speed and mean wave height were both lower during 2014-2016 than during 2016-2019. The average rate of erosion between 2016-2019 was higher than during 2014-2016 which points to a connection between wind and coastal erosion as average wind speed and wave height were higher during the 2016-2019 period. Irish wind data available on the Met Éireann (Ireland's National Meteorological Service) website was also used to highlight the stilling phenomenon of wind observable in Ireland during the last century.</p> <p> </p>
Data from: Ancestral area analyses reveal Pleistocene-influenced evolution in a clade of Coastal Plain endemic plants
<p><strong>AIM:</strong> The North American Coastal Plain is currently recognized as a global biodiversity hotspot. However, the mechanisms driving high levels of species richness in a region with relatively low topographic relief and homogeneous climate are unclear. We investigated the evolutionary processes driving ancestral area evolution and diversification in a biodiversity hotspot from both a systematic and biogeographic context using a clade endemic to the hotspot.</p> <p><strong>LOCATION</strong>: North American Coastal Plain</p> <p><strong>TAXON</strong>: The Scrub Mint clade comprises <em>Dicerandra</em>, <em>Conradina</em>, <em>Piloblephis</em>, <em>Stachydeoma</em>, and four species of <em>Clinopodium</em> (Mentheae; Lamiaceae), almost all of which are endemic to the North American Coastal Plain. </p> <p><strong>METHODS</strong>: We generated a dated phylogeny using a target enrichment/capture dataset and then calculated ancestral area using biogeographic models. We uncovered neo- and paleo-endemism hotspots and inferred ancestral potential ranges at each node based on ancestral niche reconstructions and paleoclimatic data to understand the geographic range evolution of subclades. </p> <p><strong>RESULTS</strong>: Ancestral area for the SMC was inferred to be the Florida Panhandle/Apalachicola River basin. A diversification event likely happened around the mid-Pleistocene Transition. Endemism hotspots were recovered in NE Florida, the Atlantic Coastal Ridge, and along the Lake Wales Ridge. Reconstructions of potential ranges support biogeographic findings, with the ancestor of the SMC likely located in the vicinity of the northeastern Gulf Coast during interglacial and glacial periods.</p> <p><strong>MAIN</strong> <strong>CONCLUSIONS</strong>: The timing of diversification events and colonization of new areas by ancestors of the SMC is consistent with the timing of major geological events in the region. The presence of multiple types of endemism highlights the complexity of evolutionary and ecological processes that foster the large number of endemic taxa found in this region. Efforts to identify hotspots in this region will be critical to preserving the remaining pockets of biodiversity threatened by global change.</p>
Population bottleneck associated with but likely preceded the recent evolution of self-fertilization in a coastal dune plant
<p>Evolution of self-fertilization may be initiated by a historical population bottleneck, which should diagnostically reduce lineage-wide genetic variation. However, selfing can also strongly reduce genetic variation after it evolves. Distinguishing process from pattern is less problematic if mating system divergence is recent and geographically simple. Dramatically reduced diversity is associated with the transition from outcrossing to selfing in the Pacific coastal endemic Abronia umbellata that includes large-flowered, self-incompatible populations (var. umbellata) south of San Francisco Bay and small-flowered, autogamous populations (var. breviflora) to the north. Compared to umbellata, synonymous nucleotide diversity across 10 single-copy nuclear genes was reduced by 94% within individual populations and 90% across the whole selfing breviflora lineage, which contained no unique polymorphisms. The geographic pattern of genetic variation is consistent with a single origin of selfing that occurred recently (7–28 kya). These results are best explained by a historical bottleneck, but the two most northerly umbellata populations also contained little variation and clustered with selfing populations, suggesting that substantial diversity loss preceded the origin of selfing. A bottleneck may have set the stage for the eventual evolution of selfing by purging genetic load that prevents the spread of selfing.</p>
Population bottleneck associated with but likely preceded the recent evolution of self-fertilization in a coastal dune plant
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Data from: Ancestral area analyses reveal Pleistocene-influenced evolution in a clade of Coastal Plain endemic plants
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Data from: Phylogeography of the prickly sculpin (Cottus asper) in north-western North America reveals parallel phenotypic evolution across multiple coastal–inland colonizations
Aim: Glacial cycles during the Pleistocene may have frequently contributed to parallel evolution of phenotypes across independently evolving genetic lineages associated with separate glacial refugia. Previous studies based on morphology suggested that the prickly sculpin (Cottus asper) survived the Last Glacial Maximum (LGM) in southern coastal and inland refugia, favouring allopatric divergence between coastal and inland prickling phenotypes, which vary in the degree to which spine-like scales cover the body of the fish. Herein, we aimed to test whether parallel evolution across multiple genetic lineages rather than a single-lineage origin of highly prickled inland sculpins could serve as an explanation for the biogeographical distribution of prickling phenotypes. Location: North-western North America, Southeast Alaska and Canada (British Columbia). Methods: We used data from mitochondrial haplotypes and 19 microsatellite loci to identify distinct genetic lineages as a basis to interpret patterns of phenotypic evolution. Results: The occurrence of multiple mtDNA groups suggests that highly prickled inland phenotypes comprise more than one genetic lineage. Both mtDNA and microsatellite data are consistent with post-glacial dispersal along the coast and repeated coastal to inland colonization events, as opposed to inland dispersal of a single lineage from a southern refugium to northern regions. Main conclusions: Our results suggest that highly prickled inland phenotypes evolved repeatedly following multiple inland colonization events, probably via coastal rivers. The prickly sculpin therefore provides an example of recent (post-glacial) parallel evolution, potentially facilitated by standing genetic variation already present in the ancestral coastal populations.
Supplementary material 4 from: Vanegas-Ríos JA, Serra Alanís WS, Azpelicueta MM, Litz T, Malabarba LR (2024) Population variation of Diapoma pampeana (Characiformes, Characidae, Stevardiinae) from an isolated coastal drainage in Uruguay, with new records: comparing morphological and molecular data. Zoosystematics and Evolution 100(1): 69-85. https://doi.org/10.3897/zse.100.112778
Cluster analysis (Ward's method) of size-corrected morphometric data of analyzed specimens of Diapoma pampeana
Data from: Phylogeography of the prickly sculpin (Cottus asper) in north-western North America reveals parallel phenotypic evolution across multiple coastal–inland colonizations
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Data from: The influence of spatially heterogeneous anthropogenic change on bill size evolution in a coastal songbird
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Data from: Genomic evidence for the parallel evolution of coastal forms in the Senecio lautus complex
Instances of parallel ecotypic divergence where adaptation to similar conditions repeatedly cause similar phenotypic changes in closely related organisms are useful for studying the role of ecological selection in speciation. Here we used a combination of traditional and next generation genotyping techniques to test for the parallel divergence of plants from the Senecio lautus complex, a phenotypically variable groundsel that has adapted to disparate environments in the South Pacific. Phylogenetic analysis of a broad selection of Senecio species showed that members of the S. lautus complex form a distinct lineage that has diversified recently in Australasia. An inspection of thousands of polymorphisms in the genome of 27 natural populations from the S. lautus complex in Australia revealed a signal of strong genetic structure independent of habitat and phenotype. Additionally, genetic differentiation between populations was correlated with the geographical distance separating them, and the genetic diversity of populations strongly depended on geographical location. Importantly, coastal forms appeared in several independent phylogenetic clades, a pattern that is consistent with the parallel evolution of these forms. Analyses of the patterns of genomic differentiation between populations further revealed that adjacent populations displayed greater genomic heterogeneity than allopatric populations and are differentiated according to variation in soil composition. These results are consistent with a process of parallel ecotypic divergence in face of gene flow.
Supplementary material 8 from: Vanegas-Ríos JA, Serra Alanís WS, Azpelicueta MM, Litz T, Malabarba LR (2024) Population variation of Diapoma pampeana (Characiformes, Characidae, Stevardiinae) from an isolated coastal drainage in Uruguay, with new records: comparing morphological and molecular data. Zoosystematics and Evolution 100(1): 69-85. https://doi.org/10.3897/zse.100.112778
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Allen Brain Atlas
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OpenNeuro
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