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138 results for “Late Holocene”
Modelling the distribution of Amazonian tree species in response to long-term climate change during the mid-late Holocene
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Data from: Mid-Late Holocene coral calcification dynamics: Deciphering climatic and environmental effects
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Late Holocene tundra fires and linkages to climate and vegetation in northern Alaska
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Late Holocene Tree Ring Widths, Hudson Valley: Level 1
Reconstruction of pre-instrumental, late Holocene climate is important for understanding how climate has changed in the past and how climate might change in the future. Statistical prediction of paleoclimate from tree ring widths is challenging because tree ring widths are a one dimensional summary that represents a multi-dimensional set of climate and biotic influences. We develop a Bayesian hierarchical framework using a non-linear, biologically motivated tree ring growth model to jointly reconstruct temperature and precipitation in the Hudson Valley, New York. Using a common growth function to describe the response of a tree to climate, we allow for species-specific parameterizations of the growth response. To enable predictive backcasts, we model the climate variables with a vector auto-regressive process on an annual time scale coupled with a multivariate conditional auto-regressive process that accounts for temporal correlation and cross-correlation between temperature and precipitation within years. Our multi-scale temporal model allows for flexibility in the climate response through time at different temporal scales and predicts reasonable climate scenarios given tree ring width. This material is based upon work supported by the National Science Foundation under Grants #DEB-1241874, 1241868, 1241870, 1241851, 1241891, 1241846, 1241856, 1241930.
Late Holocene Precipitation, Hudson Valley: Level 2
Reconstruction of pre-instrumental, late Holocene climate is important for understanding how climate has changed in the past and how climate might change in the future. Statistical prediction of paleoclimate from tree ring widths is challenging because tree ring widths are a one dimensional summary that represents a multi-dimensional set of climate and biotic influences. We develop a Bayesian hierarchical framework using a non-linear, biologically motivated tree ring growth model to jointly reconstruct temperature and precipitation in the Hudson Valley, New York. Using a common growth function to describe the response of a tree to climate, we allow for species-specific parameterizations of the growth response. To enable predictive backcasts, we model the climate variables with a vector auto-regressive process on an annual time scale coupled with a multivariate conditional auto-regressive process that accounts for temporal correlation and cross-correlation between temperature and precipitation within years. Our multi-scale temporal model allows for flexibility in the climate response through time at different temporal scales and predicts reasonable climate scenarios given tree ring width. This material is based upon work supported by the National Science Foundation under Grants #DEB-1241874, 1241868, 1241870, 1241851, 1241891, 1241846, 1241856, 1241930.
Late Holocene Temperature, Hudson Valley: Level 2
Reconstruction of pre-instrumental, late Holocene climate is important for understanding how climate has changed in the past and how climate might change in the future. Statistical prediction of paleoclimate from tree ring widths is challenging because tree ring widths are a one dimensional summary that represents a multi-dimensional set of climate and biotic influences. We develop a Bayesian hierarchical framework using a non-linear, biologically motivated tree ring growth model to jointly reconstruct temperature and precipitation in the Hudson Valley, New York. Using a common growth function to describe the response of a tree to climate, we allow for species-specific parameterizations of the growth response. To enable predictive backcasts, we model the climate variables with a vector auto-regressive process on an annual time scale coupled with a multivariate conditional auto-regressive process that accounts for temporal correlation and cross-correlation between temperature and precipitation within years. Our multi-scale temporal model allows for flexibility in the climate response through time at different temporal scales and predicts reasonable climate scenarios given tree ring width. This material is based upon work supported by the National Science Foundation under Grants #DEB-1241874, 1241868, 1241870, 1241851, 1241891, 1241846, 1241856, 1241930.
Fig. 4. Bivariate graphs for the Smilodon populator specimen MNHN-P 957. A in An extremely large saber-tooth cat skull from Uruguay (late Pleistocene -early Holocene, Dolores Formation): body size and paleobiological implications
Fig. 4. Bivariate graphs for the Smilodon populator specimen MNHN-P 957. A, PM3 transverse diameter (PM3ML) versus PM3 anteroposterior diameter (PM3AP); B, PM4 transverse diameter (PM4ML) versus PM4 anteroposterior diameter (PM4AP). Data from different sources (see Material and methods).
Figure 3. Bivariate graphs for the Smilodon populator specimen MNHN-P 957. A in An extremely large saber-tooth cat skull from Uruguay (late Pleistocene -early Holocene, Dolores Formation): body size and paleobiological implications
Figure 3. Bivariate graphs for the Smilodon populator specimen MNHN-P 957. A, zygomatic width (ZW) versus condylobasal length (CBL); B, canine transverse diam- eter (CML) versus canine anteroposterior diameter (CAP). Data from different sources (see Material and methods).
Data from: Shifting niches of marine predators due to human exploitation: the diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
Stable isotope ratios of carbon and nitrogen in archaeological and modern bone samples have been used to reconstruct the dietary changes of the South American sea lion Otaria flavescens from the late Holocene to the present in the southwestern Atlantic. We sampled bones from archaeological sites in northern-central and southern Patagonia, Argentina, and bones housed in modern scientific collections. Additionally, we analyzed the stable isotope ratios in ancient and modern shells of intertidal molluscs to explore changes in the isotope baseline and allow comparison between bone samples from different periods after correction for baseline shifts. Results confirmed the trophic plasticity of the South American sea lion, demonstrated the much larger impact of modern exploitation of marine resources as compared with that of hunter-gatherers, and underscored the dissimilarity between the past and modern niches of exploited species. These conclusions are supported by the rather stable diet of South American sea lions during several millennia of aboriginal exploitation, in both northern-central and southern Patagonia, and the dramatic increase in trophic level observed during the twentieth century. The recent increase in trophic level might be related to the smaller population size resulting from modern sealing and the resulting reduced intraspecific competition. These results demonstrate how much can be learned about the ecology of modern species thanks to retrospective studies beyond the current, anthropogenically modified setting where ecosystem structure is totally different from that in the pristine environments where current species evolved.
Dataset for Marine Geology publication "Estimation of turbidite source area in late Pleistocene to Holocene around Kikai Island based on mineral and biogenic calcium carbonate composition"
<p>This dataset is associated with the academic paper published in "Estimation of turbidite source area in late Pleistocene to Holocene around Kikai Island based on mineral and biogenic calcium carbonate composition" For details of the paper, please refer to the link below.<br><a href="https://doi.org/10.1016/j.margeo.2025.107593">https://doi.org/10.1016/j.margeo.2025.107593</a></p> <p> </p>
Table for Paper: Late Pleistocene-Holocene Paleoseismology of Mingle-Damaying Fault and the Indication for the Crustal Shortening Mechanism of East Qilian Shan, Northeast Tibetan Plateau
<p>The material for sampling is charred material and they are analyzed in Beta Analytic Inc., USA and AMS <sup>14</sup>C dating laboratory of Peking University. Both of the laboratories provide conventional age, as well as calibrated age using INTCAL13 (Reimer et al., 2013).</p>
Data for paper: Late Pleistocene-Holocene Paleoseismology of Mingle-Damaying Fault and the Indication for the Crustal Shortening Mechanism of East Qilian Shan, Northeast Tibetan Plateau
<p>All of the data are in format of JPG</p>
Volcanic impacts dominate bidecadal-multidecadal temperature variations during the late Holocene in Northern Fennoscandia
<p>The repository contains one Excel table including two data sets. The first one gives the predictable (smooth) and non-predictable (varying) component of average summer temperatures for years 20-2000 AD. The sum of the components equals the temperature reconstruction of Esper et al. (2012) for Northern Scandinavia. The second set gives the leading years of the first significant deviations (FCD), totally 79 of them.</p>
Datasets associated with: Late Holocene spread of pastoralism coincides with endemic megafaunal extinction on Madagascar
<p><span>Recently expanded estimates for when humans arrived on Madagascar (up to ~10,000 years ago) highlight questions about the causes of the island's relatively late megafaunal extinctions (~2000-500 years ago). Introduced domesticated animals could have contributed to extinctions, but the arrival times and past diets of exotic animals are poorly known. To conduct the first explicit test of the potential for competition between introduced livestock and extinct endemic megafauna in southern and western Madagascar, we generated new radiocarbon and stable carbon and nitrogen isotope data from the bone collagen of introduced ungulates (zebu cattle, ovicaprids, and bushpigs, n=66) and endemic megafauna (pygmy hippopotamuses, giant tortoises, and elephant birds, n=68) and combined these data with existing data from endemic megafauna (n=282, including giant lemurs). Radiocarbon dates confirm that introduced and endemic herbivores briefly overlapped chronologically in this region between 1000 and 800 calibrated years before present (cal BP). Moreover, stable isotope data suggest that goats, tortoises, and hippos had broadly similar diets or exploited similar habitats. These data support the potential for both direct and indirect forms of competition between introduced and endemic herbivores. We argue that competition with introduced herbivores, mediated by opportunistic hunting by humans and exacerbated by environmental change, contributed to the late extinction of endemic megafauna on Madagascar.</span></p>
FIGURE 12 in Preliminary Report on the Late Pleistocene and Holocene Diatoms of Swamp Lake, Yosemite National Park, California, USA
FIGURE 12: Relative abundances of species of Asterionella, Synedra, and Tabellaria in Livingstone core 02–05 with abundances of greater than 1% of the assemblage in at least one sample.
FIGURE 17 in Preliminary Report on the Late Pleistocene and Holocene Diatoms of Swamp Lake, Yosemite National Park, California, USA
FIGURE 17: Relative abundances of species of Eunotia and Frustulia in Livingstone core 02–05 with abundances of greater than 1% of the assemblage in at least one sample.
FIGURE 10 in Preliminary Report on the Late Pleistocene and Holocene Diatoms of Swamp Lake, Yosemite National Park, California, USA
FIGURE 10: Relative abundances of species of Fragilaria and Pseudostaurosira in freeze core FZ02–05 with abundances of greater than 1% of the assemblage in at least one sample. The freeze core record represents the last 1000 years.
Datasets associated with: Late Holocene spread of pastoralism coincides with endemic megafaunal extinction on Madagascar
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Data from: Shifting niches of marine predators due to human exploitation: the diet of the South American sea lion (Otaria flavescens) since the late Holocene as a case study
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Mid to late-Holocene palynomorph, charcoal and sediment data from three middle and high-altitude sediment cores from the Kashmir Valley
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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
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.