Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
2,399
datasets available to search
ShareScore release 0.9.0
Dataset results
2,399 results for “fragmenter”
Data from: Can matrix structure affect animal navigation between fragments? A dispersal experiment using release platforms
<p>The persistence of species in fragmented landscapes relies on landscape connectivity and individuals' ability in dispersing among habitat patches. Accordingly, matrix structure can affect the orientation of dispersing individuals across the landscape. In this study, we measured the impact of matrix structure on the dispersal performance of the white-eared opossum (Didelphis albiventris). We released individuals in three types of matrix: bare field, corn crops and soybean crops, with distances of 30, 50 and 100 m to the nearest habitat patch. To test if the release height would affect the individuals' dispersal performance, we released animals from the ground and from 2 m high platforms. We released and tracked 14 individuals in bare field on the ground; 30 in corn crops, 22 on the ground and 8 on platforms; 17 on soybeans crop, 12 on the ground and 5 on platforms. The type of matrix influenced the perceptual range. Perceptual range was 100 m in bare field, 50 m in cornfield and less than 30 m in soybean field. The platforms only increased the perceptual range of individuals in the cornfield from 50 to 100 m. Visual and olfactory cues would cause this effect. We conclude that matrix structure affects dispersal performance, and that vertical elements of the matrix, such as scattered trees, may increase orientation in crop fields during inter-patch dispersal.</p>
FIGURE 2 in A new naidid oligochaete species (Annelida, Clitellata, Naididae) from Vietnam with asexual reproduction by fragmentation
FIGURE 2. Details of the morphology of Bratislavia gusevi sp. n. A. Entire body of the holotype, dorsolateral view. B. Body surface, dorsal view. C. Coelomocytes (clm) in mid-body region. D. Anterior body part of a complete individual, lateral view. E. Posterior body part of a complete individual, lateral vie; F. Posterior end of an individual devoid of the tail part of the body, lateral view. Roman numerals (here and in the following figure): segment numbers, EN: position of the enlarged needle chaetae.
FIGURE 1 in A new naidid oligochaete species (Annelida, Clitellata, Naididae) from Vietnam with asexual reproduction by fragmentation
FIGURE 1. Study area in Vietnam (asterisk on the map) and photographs of the sampling sites (S1, S2) where Bratislavia gusevi sp. n. was found.
FIGURE 4 in A new naidid oligochaete species (Annelida, Clitellata, Naididae) from Vietnam with asexual reproduction by fragmentation
FIGURE 4. Chaetae types of Bratislavia gusevi sp. n. A. (from left to right): Enlarged simple-pointed, regular simple-pointed, bifid dorsal needle chaetae. B. Enlarged needle chaeta. C. Regular simple-pointed needle chaeta. D. Tip of a bifid needle chaeta. E. Tip of a trifid needle chaeta. F. Ventral chaetae of segment II of an individual with complete head region. G. Ventral chaetae of segment IX of an individual with complete head region. H. Posterior ventral chaetae of segment XXV.
FIGURE 3 in A new naidid oligochaete species (Annelida, Clitellata, Naididae) from Vietnam with asexual reproduction by fragmentation
FIGURE 3. Details of the morphology of Bratislavia gusevi sp. n. A. Front end of an individual devoid of head part, regeneration incipient, dorsolateral view. B. Front end of an individual with partially regenerated head part, lateral view. C. Body constriction in an incomplete individual, lateral view. D. Partially divided body in an incomplete individual, lateral view.
◂Fig. 5 Ramisyllis kingghidorahi n. sp. and host sponge Petrosia sp. A Anterior region in dorsal view, prostomium faces down. B Fragment of one specimen. C-F–f Host sponges in their natural habitat. Scale bars: 2 mm A, B, 1 cm C, D and 5 mm E, F in Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan
◂Fig. 5 Ramisyllis kingghidorahi n. sp. and host sponge Petrosia sp. A Anterior region in dorsal view, prostomium faces down. B Fragment of one specimen. C-F–f Host sponges in their natural habitat. Scale bars: 2 mm A, B, 1 cm C, D and 5 mm E, F
Encyclopedia [IO Islamic 1622] النقایة, fragment of
<ul> <li><strong>Encyclopedia. </strong>النقایة</li> <li><strong>This manuscript is now IO Islamic 1622 </strong><strong>in the India Office collections.</strong></li> <li><strong>[metadata:</strong><a href="https://de.wikipedia.org/wiki/Otto_Loth"> <strong>Otto Loth, </strong></a><strong><em><a href="http://doi.org/10.5281/zenodo.3923636">A Catalogue of the Arabic Manuscripts in the Library of the India Office</a></em>, (volume 1), no. 1029 here with notations and hyperlinks]</strong>.</li> </ul> <p><strong><a href="https://archive.org/details/catalogueofarabi01greauoft/page/284/mode/2up">1029</a></strong>.</p> <p>1622. Size 9 in. by 4<sup>3/4</sup> in.; foll. 50. Eight lines in a page.</p> <p>A fragment of an encyclopedic treatise on the Muḥammadan Sciences, which, from the headings, appears to be <a href="http://worldcat.org/identities/lccn-n80081636/">SUYÛṬÎ</a>’S (d. A.H. 911) النقایة. See regarding this work, Ḥ. Kh. vi. 372; <a href="https://findit.library.yale.edu/catalog/digcoll:2845405">Cat. Mus. Brit</a>. 213 [<strong>ed note</strong>:= CCCCXXXII, p. 213; Add. 7523 Rich]; <a href="http://worldcat.org/identities/lccn-nr88004247/">Flügel</a>, <a href="https://doi.org/10.5281/zenodo.4727583">Hdss. Wien, i</a>. 22.</p> <p>Well written, but damaged and in disorder. Both the beginning and end are wanting. Foll. 1-7 are really the last of this fragment, and fol. 8 begins in what would be the first paragraph of the treatise. The last leaf gives the conclusion of a <em>Persian</em> tract.</p> <p>[<a href="https://doi.org/10.5281/zenodo.4085990">Johnson</a>.]</p> <p> </p>
Impact of landscape fragmentation and climate change on body size variation of bumblebees during the last century
<p>Body size is a key parameter of organism fitness. While the impact of climate change on body size has received increasing attention, the long-term consequences of landscape fragmentation are still poorly known. These two major global threats may potentially induce opposite trends: the decrease of body size in warmer environments (e.g. individuals developing faster) or the selection of larger individuals in fragmented habitats (e.g. large individuals more capable of reaching distant patches). We assessed the relationship between temperature and landscape fragmentation with mean body size during the last century, within four European regions (Austria, Belgium, England and above the Arctic circle in Scandinavia) and among queens of five bumblebee species. At the regional scale, we first analysed the variation over time of body size and the two hypothesised drivers, temperature and landscape fragmentation. Then, at the local landscape scale, we tested whether body size varied according to these drivers irrespective of the region. At the regional level, we observed a statistically clear increase of queen body size corresponding to an increase of landscape fragmentation (i.e. in Belgium and England). There was no increase of size when fragmentation did not increase (i.e. in Austria and above the Arctic Circle). Temperature also increased through time in all regions. At the local landscape scale, we found that all species were impacted by changes in both climate and landscape fragmentation but show different trends. The body size of the two largest species significantly increased at landscape level with higher fragmentation while body size of the two smallest species decreased with higher fragmentation. We highlight that, in a context of global changes, landscape fragmentation can also be a major driver of body size clines. Depending on the dispersal abilities of species, larger species could be positively selected for and overcome landscape fragmentation.</p>
Fig. 2 in Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians
Fig. 2. Distribution of Cordulegaster bidentata in Poland. 1 – known range, 2 – potential range (according to Bernard et al. 2009, Smolis et al. 2012), 3 – disjuntive site in the Wiśnickie Foothills (Kłonowska-Olejnik & Buczyński 2014), 4 – past record of single imago from Kraków (Prüffer 1920), 5 – northern border of the Carpathians, 6 – state border, 7 – main rivers, 8 – study area.
Fig. 3 in Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians
Fig. 3. Map of the study area and discovered sites of Cordulegaster bidentata. 1 – study area, 2 – forests, 3 – cities, 4 – watercourses, 5 – searched stream sections, 6 – localities of C. bidentata larvae.
FIGURE 2. Overview tree for the COI gene fragment. Bayesian inference tree using MrBayes 3.2.7a in The Oracle of Delphi-a molecular phylogenetic approach to Greek Cordulegaster Leach in Brewster, 1815 (Odonata: Anisoptera: Cordulegastridae)
FIGURE 2. Overview tree for the COI gene fragment. Bayesian inference tree using MrBayes 3.2.7a using the best-fit model (GTR+I+G) identified with JModeltest 2.1.10. Bayesian posterior probabilities values are depicted at the nodes. Included are our own sequences (PCR number next to the name) and those retrieved from GenBank (accession numbers next to the name), if specimens identify different taxa in the COI and ITS analysis they are considered hybrids. Haplotype analysis (TCS-network made in PopART 1.7) is shown in Figs. 5 and 6.
FIGURE 3. Overview tree from the ITS gene fragment. Bayesian inference tree using MrBayes 3.2.7a in The Oracle of Delphi-a molecular phylogenetic approach to Greek Cordulegaster Leach in Brewster, 1815 (Odonata: Anisoptera: Cordulegastridae)
FIGURE 3. Overview tree from the ITS gene fragment. Bayesian inference tree using MrBayes 3.2.7a using the best-fit model (HKY+G) identified with JModeltest 2.1.10. Bayesian posterior probabilities values are depicted at the nodes. Included are our isolated sequences (PCR number next to the name) and those retrieved from GenBank (accession numbers next to the name), if specimens identify different taxa in the COI and ITS analysis they are indicated hybrids.
ProtNAff: Protein-bound Nucleic Acid filters and fragment libraries
<p>This dataset contains the library produced by the ProtNAff tool for the paper.</p> <p>The files are in the numpy format matrix.</p> <p>There are files for the reduced and the all atoms fragments.</p>
Contrasting genetic responses to habitat fragmentation for two Lycaenid butterfly species
<p>Biodiversity is currently declining at the global scale. Apart from species declines and lowered abundances, the loss of genetic diversity is equally concerning as it may undermine fitness and the potential to adapt to future environmental change. We compared genetic diversity of historical and recent Alpine populations of two butterfly species, <em>Lycaena helle</em> and <em>L. hippothoe</em>, over a period of about 10 years. Using microsatellite markers, we found no changes over time in <em>L. helle</em>, while genetic diversity decreased, and differentiation increased in <em>L. hippothoe</em>. <em>Lycaena helle</em> inhabits peat bogs and wetland fallows with populations being strongly isolated, while <em>L. hippothoe</em> used to occur in population networks on hay meadows, with the latter being strongly exposed to agricultural intensification. We conclude that currently <em>L. hippothoe</em> populations are strongly declining due to changes in land use, resulting in genetic erosion potentially due to the collapse of population networks.</p>
Dung beetles maintain phylogenetic divergence but functional convergence across a highly fragmented tropical landscape
<p>Understanding how human-modified landscapes affect the phylogenetic composition and assembly mechanisms of biological communities is critical for effectively managing and restoring tropical ecosystems. We evaluated how forest coverage loss, fragmentation, and landscape heterogeneity affect the phylogenetic diversity of dung beetles and their assembly mechanisms in Los Tuxtlas Biosphere Reserve, a protected but highly fragmented tropical landscape. We calculated Faith's phylogenetic diversity, mean pairwise phylogenetic distance, and mean nearest taxon distance for 5,388 individuals in 36 species. The standardised effect sizes of these metrics were estimated to control their correlation with species richness. Phylogenetic diversity was also assessed separately for each dung beetle functional group. Finally, we compared the mean functional and phylogenetic pairwise distance and mean nearest taxon distance and measured the phylogenetic signal among dung beetle functional traits to determine the influence of niche conservatism on the phylogenetic structure of species assemblages. Faith's phylogenetic diversity of dung beetles was positively correlated with forest coverage, while their mean phylogenetic and nearest taxon distance values decreased with increasing landscape fragmentation. Necrophagous beetles and forest specialists responded most negatively to forest coverage loss and fragmentation. Alpha and beta diversity values showed phylogenetic overdispersion but functional convergence and weak phylogenetic signals in their functional traits, suggesting low niche conservatism. Landscapes with moderate forest coverage (≥ 40%) favoured higher phylogenetic beta diversity, whereas phylogenetic and functional beta diversity decreased significantly in landscapes with low forest coverage (< 30%).</p> <p><em>Synthesis and applications:</em> Forest habitats in fragmented landscapes are essential for safeguarding the evolutionary history of dung beetles, reducing biotic homogenisation processes by favouring phylogenetic overdispersion and complementarity between sites. Therefore, to secure the phylogenetic diversity of dung beetles within fragmented tropical reserves, we recommend protecting the existing forests, preventing further fragmentation of continuous forest areas, and increasing matrix quality by implementing biodiversity-friendly production systems. Finally, managers should consider assessing different functional groups in other species, as their response to landscape disturbance may not be phylogenetically similar. The above will allow more effective management practices to protect the species most susceptible to disturbances.</p>
Distribution. Fragmented distribution in the Tibetan Plateau in China (Xinjiang, Xizang & Qinghai); one population drifts from S Xinjiang into NW India (Ladakh) and another from Qinghai to Gansu, China. in Bovidae
Distribution. Fragmented distribution in the Tibetan Plateau in China (Xinjiang, Xizang & Qinghai); one population drifts from S Xinjiang into NW India (Ladakh) and another from Qinghai to Gansu, China.
Scoring of 13 microsatellite loci for Tetrastigma loheri in Cebu (Philippines) based on the fragment length size of their respective alleles
<p>Little is known about the effects of habitat fragmentation on the patterns of genetic diversity and genetic connectivity of species in the remaining tropical forests of Southeast Asia. This is particularly evident in Cebu, a Philippine island that has a long history of deforestation and has lost nearly all of its forest cover. To begin filling this gap, data from 13 microsatellite loci developed for Tetrastigma loheri (Vitaceae), a common vine species in Philippine forests, were used to study patterns of genetic diversity and genetic connectivity for the four largest of the remaining forest areas in Cebu. Evidence of relatively high levels of inbreeding was found in all four areas, despite no evidence of low genetic diversity. The four areas are genetically differentiated, suggesting low genetic connectivity. The presence of inbreeding and low genetic connectivity in a commonly encountered species such as T. loheri in Cebu suggests that the impact of habitat fragmentation is likely greater on rare plant species with more restricted distributions in Cebu. Conservation recommendations for the remaining forest areas in Cebu include the establishment of steppingstone corridors between nearby areas to improve the movement of pollinators and seed dispersers among them.</p>
Distribution. NE Mediterranean region, fragmented distribution in SE Bulgaria and W Turkey (E Thrace and the Aegean coast of W Anatolia); it may occur in NE Greece. in Gliridae
Distribution. NE Mediterranean region, fragmented distribution in SE Bulgaria and W Turkey (E Thrace and the Aegean coast of W Anatolia); it may occur in NE Greece.
Distribution. Restricted to the cooler waters of the N Atlantic Ocean, as far N as the Davis Strait, Jan Mayen, and Spitsbergen, and as far S as NE USA, Azores, and Canary Is; in E Atlantic Ocean, this species appears to be relatively rare S of Bay of Biscay. Although its occurrence seems to be relatively continuous in some parts of its distribution, such as in the E Atlantic Ocean, it appears to be more fragment ed in others, such as in the waters off E Canada. in Ziphiidae
Distribution. Restricted to the cooler waters of the N Atlantic Ocean, as far N as the Davis Strait, Jan Mayen, and Spitsbergen, and as far S as NE USA, Azores, and Canary Is; in E Atlantic Ocean, this species appears to be relatively rare S of Bay of Biscay. Although its occurrence seems to be relatively continuous in some parts of its distribution, such as in the E Atlantic Ocean, it appears to be more fragment ed in others, such as in the waters off E Canada.
Distribution. Endemic to NE South Africa, highly restricted and fragmented distribution documented from six confirmed sites in far N Drakensberg escarpment, Limpopo Province. in Chrysochloridae
Distribution. Endemic to NE South Africa, highly restricted and fragmented distribution documented from six confirmed sites in far N Drakensberg escarpment, Limpopo Province.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.