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.
7,883
datasets available to search
ShareScore release 0.9.0
Dataset results
7,883 results for “Tropic”
FIGURE 19 in Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America
FIGURE 19. Distribution of Cheilolejeunea tonduzana and C. trifaria var. trifaria in the Pacific dominion and the Páramo province.
Legacy effects of canopy gaps on liana abundance 25 years later in a seasonal tropical evergreen forest in northeastern Thailand
<p><span>Liana</span><span>s </span><span>require host trees to reach and stay in the forest canopy, but as seedlings and juveniles, they benefit from canopy gaps created by treefalls</span><span>.</span><span> Here, we evaluated the relative importance of these two aspects, i.e., the availability of potential</span><span> hosts</span><span> vs. the legacy effect of past treefall gaps, on the local abundance of liana stems in a seasonal tropical evergreen forest in the Sakaerat Biosphere Reserve in northeastern Thailand. Within a 2.5-ha plot for forest dynamics monitoring, canopy height was measured in 1993 and 2018 at 5-m intervals to distinguish areas of mature (canopy height </span><span>≥</span><span> 20 m), building (10-20 m), and gap phases (< 10 m). In 2017–2018, we surveyed all liana stems </span><span>≥</span><span> 1 cm in diameter at breast height within 50 subplots (10 m × 10 m each) and recorded their diameter and the diameter of the host tree. Of a total of 445 liana individuals, 242 could be identified at least to the family level, while the others had clear morphological traits of climbing mechanisms. The number of liana stems was higher in areas that had been at the building/gap phase than those at the mature phase in 1993. When this 25-year-old legacy of past gap locations was considered, there was a positive association of local abundance between lianas and trees in areas at the mature phase in 2018. In conclusion, liana abundance reflected a long-term legacy of past treefall gaps more than 25 years earlier in this seasonal evergreen forest.</span></p>
FIGURE 7 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 7. Lacandodrilus paludosus gen. et sp. nov. A. Paratype IEOL 2312. Internal, dorsal view of segments 11–14, showing the ovaria after removal of esophagus. dv= dorsal vessel, ff= female funnel, nc= nerve cord, nep= nephridia, ovr= ovarium, B. Holotype IEOL 3190, right spermathecae, lateral view. amp= ampulla, du= duct, mf= part of male funnel and seminal coagulum. Scale 100 µm.
FIGURE 8 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 8. Geographical location and type of vegetation (patch of palm trees) where Lacandodrilus paludosus gen. et sp. nov. was found.
FIGURE 2 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 2. Lacandodrilus paludosus gen. et sp. nov. A. Holotype IEOL 3190, setae a with a replacement seta from segment 12. B. Paratype IEOL 6567, seta a with a replacement seta from segment 9. Scale 50 µm.
FIGURE 6 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 6. Lacandodrilus paludosus gen. et sp. nov. Internal, dorsal view. A. Paratype IEOL 6565, segments 9–13. B. Holotype IEOL 3190, segments 11–14. dv= dorsal vessel, es= esophagus, ff= female funnel, gg= genital glands, mf= male funnels, ovr= ovarium, sg= septal glands, sv= seminal vesicles. Scale 0.5 mm.
FIGURE 5 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 5. Lacandodrilus paludosus gen. et sp. nov. Internal. A. Holotype IEOL 3190. Dorsal and left side view of segments 9 and 10 (scale 100 µm). B. Paratype IEOL 6568. Dorsal view of segments 15–19 (scale 200 µm). C. Paratype IEOL 6568. Nephiridium in situ of segment 24, right side (scale 100 µm). D. Paratype IEOL 6567. Extracted nephridium of segment 30 (scale 100 µm). dv= dorsal vessel, es= esophagus, gpl= granular peritoneal layer of nephridium, lc= lateral commisures, mf= male funnels, mt= muscular tube of nephridium, nc= nerve cord, nep= nephridia, sc= seminal coagulum, sg= septal glands.
FIGURE 4 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 4. Lacandodrilus paludosus gen. et sp. nov. Internal. Anterior region, dorsal view. Paratype IEOL 6568, segments 4–10. dv= dorsal vessel, es= esophagus, lc= lateral commisures, sg= septal glands. Scale 0.5 mm.
FIGURE 1 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 1. Lacandodrilus paludosus gen. et sp. nov. External. Anterior region. Holotype IEOL 3190 A. Ventral view, segments 1–18. B. Ventral view, segments 11–14. C. Paratype IEOL 6567, ventro-lateral view of segments 10–15. D. Paratype IEOL 6565, lateral view of segments 10–15. Arrows indicate the external band that corresponds to internal male gonoducts. Letters indicate the corresponding ventral (a, b) or lateral (c, d) setae. Scale 0.5 mm.
FIGURE 3 in A new semiaquatic worm (Annelida, Oligochaeta) from southeastern Mexican tropical rain forests
FIGURE 3. Lacandodrilus paludosus gen. et sp. nov. Internal. Anterior region, dorsal view. A. Holotype IEOL 3190, segments 1–24. B. Paratype IEOL 6565, segments 3–16. dv= dorsal vessel, es= esophagus, gg= genital glands, mf= male funnels, np= nephridia, ov= ovisac, sg= septal glands, sp= spermatheca, sv= seminal vesicles. Scale 1 mm.
Tropicalization of temperate reef fish communities facilitated by urchin grazing and diversity of thermal affinities
<p><b>Aim: </b>Global declines in structurally complex habitats are reshaping both land and seascapes in directions that affect biological communities' responses to warming. Here, we test whether widespread loss of kelp habitats through sea urchin overgrazing systematically changes sensitivity of fish communities to warming.</p> <p><b>Location: </b>Global temperate latitudes</p> <p><b>Time period: </b>Modern</p> <p><b>Major taxa studied: </b>Fishes</p> <p><b>Methods: </b>Community thermal affinity shifts related to habitat were assessed by simulating and comparing fish communities from 2,271 surveys across 15 ecoregions.</p> <p><b>Results: </b>We find that fishes in kelp and urchin barrens differ in realized thermal affinities and range sizes, but only in regions where species pools have high variability in species' thermal affinities. Barrens on warm-temperate reefs host relatively more warm-affinity fish species than neighbouring kelp beds, highlighting acceleration of tropicalization processes facilitated by urchin herbivory. By contrast, proportionally more cool-affinity fishes colonize barrens at high temperate latitudes, contributing to community lags with ocean warming in these regions.</p> <p><b>Main conclusions: </b>Our findings implicate urchins as drivers of ecological change, in part by affecting biological resilience to warming.</p>
Effects of plant-available soil silicon on seedling growth and foliar nutrient status across tropical tree species
<p>Plant-available silicon (Si) concentrations vary considerably across tropical soils, yet the ecological importance of that variation remains largely unresolved. Increased Si availability can enhance growth and modulate foliar nutrient status in many crop species suggesting similar effects might occur in natural systems. However, how growth, foliar Si, and macronutrient concentrations, as well as their stoichiometry, respond to plant-available Si and how these responses differ across tropical tree species is unknown.</p> <p>We experimentally exposed seedlings of 12 tropical tree species to a gradient of plant-available Si concentrations, representing 85% of the variation found across Central Panama, and assessed responses in aboveground growth and foliar nutrient status. Furthermore, we assessed whether higher plant-available Si increases P availability.</p> <p>Increasing plant-available Si led to increased foliar Si concentrations (by up to 140%). It also led to higher aboveground growth (by up to 220%), and it affected foliar C and N concentrations, and nutrient stoichiometry across species. However, at the species level, only a small subset of two to four species showed significant growth and foliar nutrient responses. At the soil level, plant-available P remained unchanged along the experimental soil Si gradient.</p> <p>Our results showed that Si can improve growth and/or modulate foliar nutrient status in a number of tropical tree species. Furthermore, species' growth and foliar nutrient concentrations might vary differently across tropical forest sites varying in plant-available Si. Additionally, Si-induced responses in foliar nutrient stoichiometry have the potential to affect herbivory and litter decomposition. Taken together, natural variation in plant-available Si might influence plant performance unequally across tropical tree species, and change trophic interactions, with potential implications for ecosystem processes.</p>
Figs 25-33. Malasudis vernae n in Four new diarthrophallid mites (Acari, Mesostigmata, Diarthrophallidae) from tropical Africa
Figs 25-33. Malasudis vernae n.sp.,?: 25 - idiosoma, dorsal view; 26 —idiosoma, ventral view; 27 - tectum; 28 - leg I, tarsus-femur; 29 - leg II, tarsus-femur; 30 - leg III, tarsus-femur; 31 - chelicerae; 32 - leg IV, genu-femur; 33 - palp, macroseta, dorsal view.
Figs 18-24. Malasudis korae n in Four new diarthrophallid mites (Acari, Mesostigmata, Diarthrophallidae) from tropical Africa
Figs 18-24. Malasudis korae n. sp., $: 18 - idiosoma, dorsal view; 19 - idiosoma and gnathosoma, ventral view; 20 - tectum; 21 - leg I, tarsus-femur; 22 - leg II, femur; 23 - leg IV, tarsus-femur; 24 - malae exteernae and internae.
Figs 10-17. Malasudis arii n in Four new diarthrophallid mites (Acari, Mesostigmata, Diarthrophallidae) from tropical Africa
Figs 10-17. Malasudis arii n. sp.,?: 10 - idiosoma, dorsal view; 11 - idiosoma and gnathosoma, ventral view; 12 - tectum; 13 - leg I, tarsus-femur; 14 - leg II, femur; 15 - leg IV, genu-femur; 15 - leg IV, genu-femur; 16 - palp; 17 - chelicerae.
Figs 1-9. Notoporus amnoni n in Four new diarthrophallid mites (Acari, Mesostigmata, Diarthrophallidae) from tropical Africa
Figs 1-9. Notoporus amnoni n. sp., 2:1 - idiosoma, dorsal view; 2 - idiosoma and gnathosoma, ventral view; 3 - tectum; 4 - leg I, tarsus-femur; 5 - leg II, tibia-femur; 6 - leg IV, tibia-femur; 7 - palp; 8 - fragment of gnathosoma; 9 - chelicerae.
FIG. 4 in Species richness, functional diversity and assemblage structure of insectivorous bats along an elevational gradient in tropical West Africa
FIG. 4. Mean pairwise distances (MPD) of multivariate traits (A and B), forearm length (C and D), greatest skull length (E and F), narrowest breadth of skull (G and H), ear length (I and J) and tail length (K and L) of insectivorous bat assemblages along the Mount Nimba elevational gradient. Observed MPD for each elevation is represented by the blue dots. A blue line of best fit is shown for significant relationships between observed MPD and elevation. The red dots indicate the expected MPD as calculated by 999 randomized community shuffles for figures on the left, and trait shuffles for figures on the right. A red line of best fit is shown for significant relationships between expected MPD and elevation. Instances where observed MPD differs significantly from the expected MPD are indicated by black rings
FIG. 2 in Species richness, functional diversity and assemblage structure of insectivorous bats along an elevational gradient in tropical West Africa
FIG. 2. Quadratic linear regression of species richness of assemblages versus elevation (P = 0.008; species richness = 34.32 - 7.893*elevation + 0.4881*elevation2)
FIG. 3 in Spatial heterogeneity of fruit bats in a primary tropical lowland evergreen rainforest in northeastern Luzon, Philippines
FIG. 3. Capture rates of eight fruit bat species (A–H) within the understory and canopy in a tropical lowland evergreen rainforest in northeastern Luzon, Philippines. Capture rates are expressed as the number of individuals captured per mist-net hour (m2·h). Bars indicate standard errors. Statistics refer to Kruskal-Wallis tests. Note the different y-axis scale for (C) E. robusta
FIG. 5 in Species richness, functional diversity and assemblage structure of insectivorous bats along an elevational gradient in tropical West Africa
FIG. 5. Mean nearest taxon distances (MNTD) of multivariate traits (A and B), forearm length (C and D), greatest skull length (E and F), narrowest breadth of skull (G and H), ear length (I and J) and tail length (K and L) of insectivorous bats along the Mount Nimba elevational gradient. Observed MNTD for each elevation is represented by the green dots. A green line of best fit is shown for significant relationships between observed MNTD and elevation. The red dots indicate the expected MNTD as calculated by 999 randomized community shuffles for figures on the left, and trait shuffles for figures on the right. A red line of best fit is shown for significant relationships between expected MNTD and elevation. Instances where observed MNTD differs significantly from the expected MNTD are indicated by black rings
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.