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192 results for “dispersal distance”
Figure 1 in No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica
Figure 1: Study area and spatial distribution of the stranded and benthic D. antarctica in central Chile. PTOS, Puerto Oscuro; TOT, Totoralillo Sur.
Figure 4 in No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica
Figure 4: Durvillaea antarctica: average (mean±SD) concentration (mg/g wet wt) of pigments in blade samples of different sexual stage and locality, Puerto Oscuro and Totoralillo Sur. Different letters above the columns indicate differences between sexual stages significant at p =0.05. Numbers of stipes from each site and sexual stage are listed at the bottom of each column.
Figure 3 in No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica
Figure 3: Durvillaea antarctica: average (mean±SD) colour values of algal samples of different sexual stages and from two localities, Puerto Oscuro and Totoralillo Sur. Different letters above the columns indicate differences between sexual stages significant at p=0.05. Numbers of stipes from each site and sexual stage are listed at the bottom of each column.
Fig. 3 in Systematics of Cuscuta chinensis species complex (subgenus Grammica, Convolvulaceae): evidence for long-distance dispersal and one new species
Fig. 3 Phylogenetic relationships among species of the Cuscuta chinensis (C. c.) complex obtained from maximum likelihood (ML) analyses of individual trnL-F (a) and ITS (b) as well as combined datasets (c), all under the HKY + G model of DNA evolution. Asterisks indicate nodes that collapsed in a strict consensus of equally
Fig. 1 a–i in Systematics of Cuscuta chinensis species complex (subgenus Grammica, Convolvulaceae): evidence for long-distance dispersal and one new species
Fig. 1 a–i Morphology of dissected calyx in species of Cuscuta chinensis complex. a,d Cuscuta chinensis var. chinensis. b,e C. chinensis var. applanata. c,f C. alata. g C. potosina. h C. azteca. i C. yucatana. Bars 1 mm
Apendices(Effect of Vegetation Structure on Secondary Wind Dispersal Distance of Diaspores)
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Data from: Phylogeography of Bornean land snails suggests long-distance dispersal as a cause of endemism
Aim: Islands are often hotspots of endemism due to their isolation, making colonization a rare event, and hence facilitating allopatric speciation. Dispersal usually occurs between nearby locations according to a stepping-stone model. We aimed to reconstruct colonization and speciation processes in an endemic-rich system of land-based islands that does not seem to follow the obvious stepping-stone model of dispersal. Location: Five land-based habitat archipelagos of limestone outcrops in the floodplain of the Kinabatangan River in Sabah, Malaysian Borneo. Methods: We studied the phylogeography of three species complexes of endemic land snails, using multiple genetic markers. We calculated genetic distances between populations, applied BEAST2 to reconstruct phylogenies for each taxon, and subsequently reconstructed ancestral ranges using 'BIOGEOBEARS'. Results: We found spatial genetic structure among nearby locations to be highly pronounced for each taxon. Genetic correlation was present at small spatial scales only, and disappeared at distances of five kilometres and above. Most archipelagos have been colonized from within the region multiple times over the past three million years, in 78% of cases as a result of long-distance dispersal or dispersal from non-adjacent limestone outcrops. The flow of the main geographical feature within the region, the Kinabatangan River, did not play a role. Main conclusions: Phylogeographic structure in these Bornean land snails has only partly been determined by small-scale dispersal, where it leads to isolation-by-distance, but mostly by long-distance dispersal. Our results demonstrate that island endemic taxa only very locally follow a simple stepping-stone model, whilst dispersal to non-adjacent islands, and especially long-distance dispersal, is most important. This leads to the formation of highly localized, isolated "endemic populations" forming the onset of a complex radiation of endemic species.
Figure 3 in Long distance dispersal and evolution of talitrids (Crustacea: Amphipoda: Talitridae) in the northeast Atlantic islands
Figure 3. Dispersal and evolution in two "Darwinian" islands, A and B. Solid lines represent dispersal in wrack or driftwood; dashed lines indicate dispersal by synanthropic means.
Figure 2 in Long distance dispersal and evolution of talitrids (Crustacea: Amphipoda: Talitridae) in the northeast Atlantic islands
Figure 2. Habitus drawings of male talitrids. (A) Macarorchestia roffensis from Chatham Ness, UK, body length (BL) 5.4 mm; (B) Macarorchestia remyi from Principina a Mare, Italy, BL 11.0 mm; (C) Orchestia gammarellus from Chittick Beach, Canada, BL 15.5 mm.
Figure 1 in Long distance dispersal and evolution of talitrids (Crustacea: Amphipoda: Talitridae) in the northeast Atlantic islands
Figure 1. Map of the northeast Atlantic study area, showing oceanic surface currents. Upper arrows: North Atlantic Drift (part of the Gulf Stream); lower arrows: Canaries Current. Note: Based on World Atlas, 1979.
What drives diversification in a pantropical plant lineage with extraordinary capacity for long-distance dispersal and colonisation?
<p><b>Aim:</b> Colonisation of new areas may entail shifts in diversification rates linked to biogeographic movement (dispersification), which may involve niche evolution if species were not pre-adapted to the new environments. <i>Scleria</i> (Cyperaceae) includes c. 250 species and has a pantropical distribution suggesting an extraordinary capacity for long-distance dispersal and colonisation. We investigate patterns of diversification in <i>Scleria</i>, and whether they are coupled with colonisation events, climate niche shifts or both.</p> <p><b>Location:</b> Tropics and subtropics.</p> <p><b>Taxon:</b> Nutrushes <i>Scleria</i> (Cyperaceae).</p> <p><b>Methods:</b> We used molecular data from three DNA regions sequenced for 278 accessions representing 140 <i>Scleria</i> taxa (53% of species) to develop a chronogram, model ancestral ranges, and measure rates of diversification. Integrating data from 12,978 digitised and georeferenced herbarium records, we investigated niche evolution.</p> <p><b>Results:</b> High dispersal rates in <i>Scleria</i>, a genus with multiple dispersal syndromes, make reconstruction of ancestral areas at deep nodes in the phylogeny highly equivocal. Main dispersal and colonisation events involve movements from South to Central America (c. 19), from Africa to Madagascar (c. 12), from Asia to Oceania (c. 7), from Africa to South America (c. 7) and Central America to South America (c. 6). Two main shifts in diversification rates happened during the warm period of the Miocene.</p> <p><b>Main conclusions:</b> Dispersification from South America to Africa without climate niche shift seems to explain the diversification shift in section <i>Hypoporum</i> implying that species were pre-adapted. Shifts in climate niche evolution predate the second shift in diversification rates suggesting lineages were pre-adapted prior to biogeographic movements. Within subgenus <i>Scleria</i>, colonisations of Asia and Madagascar by sections <i>Elatae</i> and <i>Abortivae</i>, respectively, are coupled with niche shifts suggesting that these colonisations involved climate niche adaptation.</p>
Migration-tracking integrated phylogeography supports long-distance dispersal-driven divergence for a migratory bird species in the Japanese archipelago
<p>Previous phylogeographic studies of migratory bird species have not discriminated long-distance dispersal (LDD) from vicariant speciation in their diversification process. We conducted an integrative phylogeographic approach to test the LDD hypothesis, which predicts that a Japanese migratory bird subspecies diverged from a population in the coastal region of the East China Sea (CRECS) via LDD over the East China Sea (ECS). We used the Brown Shrike as a model species, and we conducted molecular phylogenetics, species distribution models (SDMs) and migration tracking. We assessed whether the LDD hypothesis is applicable to the divergence history of the Japanese subspecies of the Brown Shrike.</p> <p>The datasets include three zipped files, namely DataS1.zip, DataS2.zip, and DataS3.zip. See the READ ME (AOKI_et_al_2021_DATASET_README.txt) for how each of the folder and files contained in them can be used to reproduce our results.</p> <p>DataS1.zip inlcudes an xml file to conduct the BEAST analysis. Molecular data, which include nucleotide sequences obtained for cytochrome b (cytb), cytochrome oxidase c subunit I (COI), myoglobin intron-2 (MB) and transforming growth factor beta 2 intron-5 (TGFb2), have been all reposited to DDBJ international nucleotide sequence database, and accession numbers have been already given to them. Accession numbers are provided in the appendix attached to the main manuscript.</p> <p>DataS2.zip includes several data that are related to produce occurrence data of the Brown Shrike used in the analysis and an R code to reproduce the SDMs. Explanatory climatic variables are all available at WorldClim v.1.4 (Hijmans et al., 2005), which are processed in the R code.</p> <p>DataS3.zip includes migratory route analyses using light-level geolocator data are available as the original light-level data and R codes. Sensitivity analyses were also conducted in these analyses, but their codes and results are seperately provided here.</p>
Modelling long-distance seed dispersal of Spathodea campanulata in the Society Islands
<p>These datasets are related to the paper "Modelling long-distance seed dispersal of the invasive tree <em>Spathodea campanulata</em> in the Society Islands" published in Ecological Applications. We used a 3-D kinematic trajectory model (Computing Atmospheric Trajectory tool (CAT)) initiated from regional wind field data to assess the potential for long-distance seed dispersal (LDD) of a wind-dispersed invasive tree, <em>Spathodea campanulata</em> (African tulip tree) across the Society Islands (French Polynesia, South Pacific Ocean) following its initial planting and spread on the island of Tahiti. The main objective of our study was to determine whether <em>S. campanulata</em> can be expected to spread naturally among islands. Atmospheric dynamics, seed terminal velocity, precipitation, and temperature of air masses were considered to assess the potential for LDD between oceanic islands, with the island of Tahiti serving as the island source for multiple, geographically distant invasions. These datasets contain the number of simulated seed trajectories with Computing Atmospheric Trajectory tool (CAT) in the study area as well as all data corresponding to each figure found in the paper.</p>
Figure 2 in Exploring the potential of brown bear (Ursus arctos arctos) as a long-distance seed disperser: a pilot study in South-Western Europe
Figure 2: Summer (continuous line) and fall (dashed line) average distance covered by Balou (black diamonds) and Sarousse (gray triangles) over an 18 h period. This time covers gut retention time (GRT) according to Elfström et al. (2013). For a berry-based diet, median GRT50% is 5 h 47 min long and for a carcass-based diet, it is 14 h 30 min. Ninety-five percent CI have been deleted for better readability but can be found in Table 5.
Figure 1 in Exploring the potential of brown bear (Ursus arctos arctos) as a long-distance seed disperser: a pilot study in South-Western Europe
Figure 1: Western and central core brown bear subpopulations in the Pyrenees mountains from 2008 to 2012 and locations (full grey circles) of faeces used in our pilot study and collected by the Brown Bear Network.
Data from: Phylogeography of western Mediterranean Cymbalaria (Plantaginaceae) reveals two independent long-distance dispersals and entails new taxonomic circumscriptions
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Dispersal without drivers: Intrinsic and extrinsic variables have no impact on movement distances in a terrestrial amphibian
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Data from: Estimation of bumblebee queen dispersal distances using sibship reconstruction method
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Data from: Genetic evidence for high propagule pressure and long-distance dispersal in monk parakeet (Myiopsitta monachus) invasive populations
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Data from: Calcicolous plants colonize limed mires after long-distance dispersal
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.