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”
FIG. 3 in New species of lichen for Colombia tropical dry forest
FIG. 3. — Pyrenula gigaspora Soto-Medina, Aptroot & Lücking, sp. nov.: A, habitus; B, ascospores. Scale bars: A, 10 mm; B, 20 μm.
FIG. 2 in New species of lichen for Colombia tropical dry forest
FIG. 2. — Ocellularia vallensis Soto-Medina & Lücking, sp. nov.: A, habitus; B, C, ascospores. Scale bars: A, 10 mm; B, C, 10 μm.
FIG. 1 in New species of lichen for Colombia tropical dry forest
FIG. 1. — Astrothelium caucavallense Soto-Medina & Aptroot, sp. nov.: A, habitus; B, ascospores. Scale bars: A, 10 mm; B, 10 μm.
Fig. 1 Insect alpha-diversity across tropical forest habitats. a in Mangroves are an overlooked hotspot of insect diversity despite low plant diversity
Fig. 1 Insect alpha-diversity across tropical forest habitats. a Mangroves treated as one habitat; b Comparison of mangrove sites: Pulau Ubin (PU), Sungei Buloh (SB), Pulau Semakau old-growth (SMO), Pulau Semakau new-growth (SMN), other smaller mangrove fragments (see Additional File 1: Table S13); solid lines = rarefaction; dotted = extrapolations. The arrow on the x-axis indicates the point of rarefaction where species richness comparisons were made (see bar charts for absolute numbers with 95% confidence intervals)
Opposing patterns of altitude-driven pollinator turnover in the tropical and temperate Americas
<p><span>Abiotic factors (e.g., temperature, precipitation) vary markedly along elevational gradients and differentially affect major groups of pollinators. Ectothermic bees, for example, are impeded in visiting flowers by cold and rainy conditions common at high elevations, while endothermic hummingbirds may continue foraging under such conditions. Despite the possibly far-reaching effects of the abiotic environment on plant-pollinator interactions, we know little about how these factors play out at broad ecogeographic scales. We address this knowledge gap by investigating how pollination systems vary across elevations in 26 plant clades from the Americas. Specifically, we explore Cruden's 1972 hypothesis that the harsh montane environment drives a turnover from insect to vertebrate pollination at higher elevations. We compared the elevational distribution and bioclimatic attributes for a total of 2232 flowering plants and found that Cruden's hypothesis only holds in the tropics. Above 30° N and below 30°S, plants pollinated by vertebrates (mostly hummingbirds) tend to occur at lower elevations than those pollinated by insects. We posit that this latitudinal transition is due to the distribution of moist, forested habitats favored by vertebrate pollinators, which are common at high elevations in the tropics but not in the temperate Americas.</span></p>
Tropical origin, global diversification and dispersal in the pond damselflies (Coenagrionoidea) revealed by a new molecular phylogeny
<p class="western">The processes responsible for the formation of Earth's most conspicuous diversity pattern, the latitudinal diversity gradient (LDG), remain unexplored for many clades in the Tree of Life. Here, we present a densely-sampled and dated molecular phylogeny for the most speciose clade of damselflies worldwide (Odonata: Coenagrionoidea), and investigate the role of time, macroevolutionary processes and biome-shift dynamics in shaping the LDG in this ancient insect superfamily. We used process-based biogeographic models to jointly infer ancestral ranges and speciation times, and to characterise within-biome dispersal and biome-shift dynamics across the cosmopolitan distribution of Coenagrionoidea. We also investigated temporal and biome-dependent variation in diversification rates. Our results uncover a tropical origin of pond damselflies and featherlegs ~ 105 Ma, while highligthing uncertainty of ancestral ranges within the tropics in deep time. Even though diversification rates have declined since the origin of this clade, global climate change and biome-shifts have slowly increased diversity in warm- and cold-temperate areas, where lineage turnover rates have been relatively higher. This study underscores the importance of biogeographic origin and time to diversify as important drivers of the LDG in pond damselflies and their relatives, while diversification dynamics have instead resulted in the formation of ephemeral species in temperate regions. Biome-shifts, although limited by tropical niche conservatism, have been the main factor reducing the steepness of the LDG in the last 30 Myr. With ongoing climate change and increasing northward range expansions of many damselfly taxa, the LDG may become less pronounced. Our results support recent calls to unify biogeographic and macroevolutionary approaches to increase our understanding of how latitudinal diversity gradients are formed and why they vary across time and among taxa.</p>
Data from: Urbanization alters the spatiotemporal dynamics of plant-pollinator networks in a tropical megacity
<p><span>Urbanization is a major driver of biodiversity change but how it interacts with spatial and temporal gradients to influence the dynamics of plant-pollinator networks is poorly understood, especially in tropical urbanization hotspots. Here, we analyzed the drivers of environmental, spatial, and temporal turnover of plant-pollinator interactions (interaction β-diversity) along an urbanization gradient in Bengaluru, a South Indian megacity. The compositional turnover of plant-pollinator interactions differed more between seasons and with local urbanization intensity than with spatial distance, suggesting that seasonality and environmental filtering were more important than dispersal limitation for explaining plant-pollinator interaction β-diversity. Furthermore, urbanization amplified the seasonal dynamics of plant-pollinator interactions, with stronger temporal turnover in urban compared to rural sites, driven by greater turnover of native non-crop plant species (not managed by people). Our study demonstrates that environmental, spatial, and temporal gradients interact to shape the dynamics of plant-pollinator networks and urbanization can strongly amplify these dynamics. </span></p>
Demography of the understory herb Heliconia acuminata (Heliconiaceae) in an experimentally fragmented tropical landscape
<p>Habitat fragmentation remains a major focus of research by ecologists decades after being put forward as a threat to the integrity of ecosystems. While studies have documented myriad biotic changes in fragmented landscapes, including the local extinction of species from fragments, the demographic mechanisms underlying these extinctions are rarely known. However, many of them – especially in lowland tropical forests – are thought to be driven by one of two mechanisms: (1) reduced recruitment in fragments resulting from changes in the diversity or abundance of pollinators and seed dispersers or (2) increased rates of individual mortality in fragments due to dramatically altered abiotic conditions, especially near fragment edges. Unfortunately, there have been few tests of these potential mechanisms due to the paucity of long-term and comprehensive demographic data collected in both forest fragments and continuous forest sites. Here we report 11 years (1998-2009) of demographic data from populations of the Amazonian understory herb Heliconia acuminata (LC Rich.) found at Brazil's Biological Dynamics of Forest Fragments Project (BDFFP). The resulting data set comprises >66000 plant×year records of 8586 plants, including 3464 seedlings that became established after the initial census. Seven populations were in experimentally isolated fragments (one in each of four 1-ha fragments and one in each of three 10-ha fragments), with the remaining six populations in continuous forest. Each population was in a 50×100m permanent plot, with the distance between plots ranging from 500 m-60 km. The plants in each plot were censused annually, at which time we recorded, identified, marked, and measured new seedlings, identified any previously marked plants that died, and recorded the size of surviving individuals. Each plot was also surveyed 4-5 times during the flowering season to identify reproductive plants and record the number of inflorescences each produced. These data have been used to investigate topics ranging from the way fragmentation-related reductions in germination influence population dynamics to statistical methods for analyzing reproductive rates. This breadth of prior use reflects the value of these data to future researchers. In addition to analyses of plant responses to habitat fragmentation, these data can be used to address fundamental questions in plant demography, the evolutionary ecology of tropical plants, and for developing and testing demographic models and tools. Though we welcome opportunities to collaborate with interested users, there are no restrictions on the use this data set. However, we do request that those using the data for teaching or research inform us of how they are doing so and cite this paper and the data archive when appropriate. Any publication using the data must also include a BDFFP Technical Series Number in the Acknowledgments. Authors can request this series number upon the acceptance of their article by contacting the BDFFP's Scientific Coordinator or E. M. Bruna.</p>
UVA laser scanning labelled las data over tropical moist forest classified as leaf or wood points
<p>UAV Laser Scanning data collected over neotropical forest (Paracou French Guiana). Four flights conducted over one ha plot in 2021 and 2022.</p> <p>Leaf wood labels were transferred from contemporaneous (2021) TLS acquisition, for which segmentation was done using LeWoS and onscreen post correction.</p> <p>Predicted values using SOUL model (see ref below) for a single UAV-LS acquisition are provided as separate file.</p> <p> </p>
Figure 1 A in Cicadas impact bird communication in a noisy tropical rainforest
Figure 1 A comparison of the "soundscape" recorded during two 30 s periods from the same location on 6 July 2012, within secondary wet forest at Las Cruces Biological Station, Costa Rica. (a) A spectrogram from approximately 08:14 AM, before the onset of Zammara cicada choruses and shows 7 unique vocalizations (Arremon aurantiirostris call, Picumnus olivaceus, Arremon torquatus, Catharus aurantiirostris, Arremon aurantiirostris song, Phaeothlypis fulvicauda, Formicarius analis). (b) A spectrogram from approximately 08:50 AM, just after onset of Zammara cicada choruses, which can be seen by the dark, pulsing signal with a base frequency occupying much of the bandwidth between approximately 2.7 and 6.5 kHz. No birds are vocalizing during this period.
Figure 2 in Cicadas impact bird communication in a noisy tropical rainforest
Figure 2 Rate of overlap, excluding "complete" overlap, between bird and cicada signals before versus after the onset of cicada signaling for 7 recording days during June and July 2012 in secondary wet forest at Las Cruces Biological Station, Costa Rica. The "overlap before" bar represents the number of unique bird vocalizations produced prior to the onset of Zammara chorusing, with spectra that overlap to any degree with the normal base frequency range of Zammara signals. The "overlap after" bar represents the number of unique bird vocalizations with spectra that overlapped to any degree with the actual Zammara signals.
DBGIKG_tropical_toydataset
<p>A toy dataset for the Digital Botanical Gardens Initiative Knowledge Graph (DBGI-KG).</p> <p> </p> <p>Change Log</p> <p>-----</p> <p>v0.4 simplified zip archive</p> <p>-----</p> <p>Added uncompressed files in v0.3 to see if it's better handled by GNPS explorer.</p> <p>-----</p> <p>Added .zip archive in v0.2 to see if it's better handled by GNPS explorer.</p>
FIGURE 5 in Timing Is Everything: Acoustic Niche Partitioning in Two Tropical Wet Forest Bird Communities
FIGURE 5 | Comparison of observed and expected number of pairs of species with overlapping vocalization frequencies in each location (significance "**"α = 0.01). The null distributions were generated using 500 randomizations of species distribution across locations (keeping species richness per location unchanged).
FIGURE 4 in Timing Is Everything: Acoustic Niche Partitioning in Two Tropical Wet Forest Bird Communities
FIGURE 4 | Comparison of observed and expected number of heterospecific pairs of vocalizations with overlapping vocalization times and frequencies in each location (significance "***"α = 0.001, "**"α = 0.01). The null distributions were generated using 500 randomizations of the beginning of vocalizations (keeping number, length and spectral characteristics unchanged).
FIGURE 3 in Timing Is Everything: Acoustic Niche Partitioning in Two Tropical Wet Forest Bird Communities
FIGURE 3 | Comparison of species vocalization characteristics (A,B), the number of vocalizations per 5-min record (C), and number of species recorded per location (D) between Costa Rica (CR) and Hawai'i (HI) (P-value indicates the significance of Wilcoxon's rank sum test).
FIGURE 2 in Timing Is Everything: Acoustic Niche Partitioning in Two Tropical Wet Forest Bird Communities
FIGURE 2 | List of detected species with their vocalization ranges (left figures) and their locations of occurrence (right figures) in Costa Rica and Hawai'i. On the left figures, gray background represents potential overlapping in a given frequency, the darker the background, the higher the number of species using this frequency.
FIGURE 1 in Timing Is Everything: Acoustic Niche Partitioning in Two Tropical Wet Forest Bird Communities
FIGURE 1 | Species accumulation curves (mean of 500 iterations) for each of six recording locations in Costa Rica and Hawai'i.
Fig. 6 in Croton maranonensis: a new species of Euphorbiaceae from the tropical inter-Andean dry valleys
Fig. 6. Map showing the location of the known herbarium collections of Croton maranonensis sp. nov. (solid circles). Main cities in the area are indicated by white triangles.
Fig. 5 in Croton maranonensis: a new species of Euphorbiaceae from the tropical inter-Andean dry valleys
Fig. 5. Bayesian phylogram based on ITS sequences of the selected Croton species including C. maranonensis sp. nov. and representatives of sections Julocroton, Lasiogyne, Heptallon, and other sections of Croton. Numbers at nodes indicate Bayesian posterior probability values (PP). Numbers distinguishing accessions of the same species are also indicated in Appendix 2. The country of origin of the sample is indicated only for the samples of the new species..
Variations in the Intensity and Spatial Extent of Tropical Cyclone Precipitation
Open the record for dataset details and reuse information.
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.