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45 results for “mid Holocene”
FIGURE 14 in A vanished ecosystem: Sophora microphylla (Kōwhai) dominated forest recorded in mid-late Holocene rock shelters in Central Otago, New Zealand
FIGURE 14. Muehlenbeckia sp. A. Abaxial surface with stomatal complexes below and peltate trichome with divided base above (LX2891, Shelter-95, scale bar equals 40 μm). B. Three stomatal complexes among fine surface ridging and peltate trichome with divided base at lower left (LX3100, Coprolite-36, scale bar equals 40 μm).
FIGURE 9 in A vanished ecosystem: Sophora microphylla (Kōwhai) dominated forest recorded in mid-late Holocene rock shelters in Central Otago, New Zealand
FIGURE 9. Sophora cuticle morphology (Transmitted light microscopy). A. View of S. microphylla stomatal (abaxial) surface showing deeply stained trichome bases, papillae, and stomatal complexes (LX2799, Shelter-96, scale bar equals 100 μm). B. View of S. microphylla stomatal (abaxial) surface of less-stained specimen, but still showing relatively well-stained trichome bases, papillae, and stomatal complexes (LX2590, Shelter-50, scale bar equals 100 μm). C. Detail to show stomatal complexes, partly obscured by irregular papillae (LX3052, from Coprolite-26, scale bar equals 40 μm). D. View of S. microphylla non-stomatal (adaxial) surface, with deeply staining trichome attachment at right (LX3052, Coprolite-26, scale bar equals 40 μm). E. View of S. microphylla non-stomatal (adaxial) surface, with four deeply staining trichome attachments. Note the characteristic radiating surrounding epidermal cells (LX3006, Shelter-76, scale bar equals 100 μm). F. View of basal portion of S. microphylla leaf mid-rib (abaxial surface), showing dense trichome attachment sites (LX3106, Shelter-39, scale bar equals 100 μm). G. View of another style of S. microphylla cuticle morphology from basal portion of the leaf mid-rib (abaxial surface), showing dense trichome attachment sites, and thinner cuticle on either side (LX3052, Coprolite-26, scale bar equals 100 μm). H. Abaxial cuticle of Sophora prostrata. Note clearly different from S. microphylla in absence of trichome attachment sites, and distinct ring of subsidiary cells around the stoma (OPH5491, scale bar equals 100 μm).
FIGURE 10 in A vanished ecosystem: Sophora microphylla (Kōwhai) dominated forest recorded in mid-late Holocene rock shelters in Central Otago, New Zealand
FIGURE 10. Rubus sp. cuticle morphology (Transmitted light microscopy). A. Abaxial surface, showing a typical massive, flanged and hollow trichome attachment, at left, and more poorly staining cuticle with stomatal complexes in the upper right (LX2775, Coprolite-8, scale bar equals 100 μm). B. A patch of stomatal complexes, showing their typically poorly defined outlines and the sinuous walls of the epidermal and subsidiary cells (LX2818, Shelter-96, scale bar equals 100 μm).
FIGURE 19 in A vanished ecosystem: Sophora microphylla (Kōwhai) dominated forest recorded in mid-late Holocene rock shelters in Central Otago, New Zealand
FIGURE 19. Hebe pimeleoides cuticle morphology (Transmitted light microscopy). A. Abaxial surface showing relatively small papillae and stomatal complexes (LX2468, Shelter-92, scale bar equals 100 μm). B. Abaxial surface showing relatively large papillae and stomatal complexes (LX2960, Shelter-33, scale bar equals 100 μm). C. Abaxial surface detail showing slightly flanged papillae and stomatal complexes (LX2938, Shelter-39, scale bar equals 40 μm). D. Abaxial surface detail showing slightly smoother papillae and stomatal complexes (LX2947, Shelter-33, scale bar equals 40 μm). E. Adaxial surface showing lack of papillae and trichome bases (one is arrowed, LX2959, Shelter-33, scale bar equals 100 μm). F. Abaxial surface detail showing two stomatal complexes (LX2997, Shelter-51, scale bar equals 40 μm).
Too hot for the devil? Did climate change cause the mid-Holocene extinction of the Tasmanian devil (Sarcophilus harrisii) from mainland Australia?
<p>The possible role of climate change in late Quaternary animal extinctions is hotly debated, yet few studies have investigated its direct effects on animal physiology to assess whether past climate changes might have had significant impacts on now-extinct species. Here we test whether climate change could have imposed physiological stress on the Tasmanian devil (Sarcophilus harrisii) during the mid-Holocene, when the species went extinct on mainland Australia. Physiological values for the devil were quantified using mechanistic niche models of energy and water requirements for thermoregulation, and soil-moisture-based indices of plant stress from drought to indirectly represent food and water availability. The spatial pervasiveness, extremity, and frequency of physiological stresses were compared between a period of known climatic and presumed demographic stability (8000-6010 BP) and the extinction period (5000-3010 BP). We found no evidence of widespread negative effects of climate on physiological parameters for the devil on the mainland during its extinction window. This leaves cultural and demographic changes in the human population or competition from the dingo (Canis dingo) as the main contending hypotheses to explain mainland loss of the devil in the mid-Holocene.</p>
Supplementary files for the article "Reconstruction of the surface temperature employing models with different complexity levels: a study for the mid-Holocene."
<p>Dear members of the scientific community,</p> <p>This dataset contains all data and scripts used to prepare the manuscript "Reconstruction of the Surface Temperature Employing Models with Different Complexity Levels: A Study for the Mid-Holocene." </p> <p>Notice that the compressed file contains folders for the mid-Holocene and pre-industrial scenarios and the climatologies of the scenarios' differences. To sum up, we provide each model output adopted in this study and their ensembles: high-complexity models (HCM), Reduced-complexity models (RCM), and All-complexity models (ACM). The statistics and plots can be generated by running the R scripts within the "R_script" folder.</p> <p><br>Best regards,</p> <p>Emerson D. Oliveira</p>
Supplementary Data for: Worldwide consequences of a mid-Holocene cold event in the Nordic Seas
<p>SupplementaryTable1.xlsx lists all the samples used to calculate the regional reservoir correction.</p> <p>SupplementaryTable2.xlsx lists all information on the individual radiocarbon dates of all the cores used in the study: LabID, Depth [cm], 14C age ± error, Calibrated age (95% confidence range and mean), and Dated species. Please note that the age-depth relationships have been modeled using a Bayesian approach so the Calibrated ages might differ from the ages that would be yielded by the calibration of individual radiocarbon ages.</p> <p>SupplementaryTable3.xlsx contains all the data used in the study:</p> <p>OCE2017-GR02:<br>- Depth [cm] <br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Telesiński et al. 2022)<br>- summer sSST 100m [°C] (this study)</p> <p>MSM5-5-723:<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma</em> [%] (Werner et al. 2015)<br>- summer sSST 100m [°C] (this study)<br>- P<sub>B</sub>IP<sub>25</sub> (Werner et al. 2015)<br>- Planktic foraminifera fragmentation [%] (Werner et al. 2003)</p> <p>JM10-330GC:<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Consolaro et al. 2018)<br>- summer sSST 100m [°C] (this study)<br>- Planktic foraminifera [ind./g] (Consolaro et al. 2018)</p> <p>MSM5-5-712:<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Werner et al. 2013)<br>- summer sSST 100m [°C] (this study)<br>- IRD flux [#/cm**2/kyr] (Werner et al. 2013, recalculated to the new age model)<br>- P<sub>B</sub>IP<sub>25 </sub>(Müller et al. 2012)</p> <p>M23258:<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Sarnthein et al. 2003)<br>- summer sSST 100m [°C] (this study)<br>- annual SST [°C] (Martrat et al. 2003)</p> <p>M17730-4<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Telesiński et al. 2015)<br>- summer sSST 100m [°C] (this study)<br>- Planktic foraminifera [ind./g] (Telesiński et al. 2015)</p> <p>MD95-2011<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Risebrobakken et al. 2003)<br>- summer sSST 100m [°C] (this study)<br>- Planktic foraminifera [ind./g] (Risebrobakken et al. 2003)</p> <p>MD99-2284<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- <em>N. pachyderma </em>[%] (Bakke et al. 2009, Eldevik et al. 2014)<br>- summer sSST 100m [°C] (this study)</p> <p>JM09-020<br>- Depth [cm]<br>- Age [ka BP] (this study)<br>- annual SST [°C] (Łącka et al. 2019)</p> <p>SupplementaryFigure1.pdf shows Age-depth relationships of cores used in the study as modeled using a Bayesian approach with the Bacon software (Blaauw and Christen, 2011). Dark shading indicates the more likely ages for a given depth, the grey dashed line indicates the 95% confidence range, and the red dashed line indicates the best-fit (mean) age model.</p> <p>SupplementaryFigure2.pdf shows Sea-ice concentration in (A) 6.83-6.85 ka BP and (B) 7.63-7.65 ka BP in the TraCE-21ka. Subsurface (92 m) temperature in (C) 6.81-6.83 ka BP and (D) 7.63-7.65 ka BP in the TraCE-21ka.</p>
Too hot for the devil? Did climate change cause the mid-Holocene extinction of the Tasmanian devil (Sarcophilus harrisii) from mainland Australia?
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FIGURE 2 in A vanished ecosystem: Sophora microphylla (Kōwhai) dominated forest recorded in mid-late Holocene rock shelters in Central Otago, New Zealand
FIGURE 2. The Kawarau Region, showing shelter locations (red dots) along the Kawarau River.
Mid-Late Holocene coral calcification dynamics: Deciphering climatic and environmental effects
<p><span>Over the past four decades, a marked decrease in coral calcification has occurred across the world's tropical reefs, closely linked to climate change and human-activity impacts. However, how natural and human-induced factors influence coral calcification remains unclear due to limited understanding of the geological past. This study addresses this gap by investigating the calcification parameters of 82 <em>Porites</em> corals from the northern South China Sea, with growth periods covering distinct climatic epochs during the Mid-Late Holocene, including the Holocene Climate Optimum, 4.2 ka BP event, Medieval Climate Anomaly, Little Ice Age, and Current Warm Period. Our findings show a gradual increase in coral skeletal density towards the present, and varied linear extension and calcification rates between warm and cold phases and between pre- and post-industrial periods. This suggests that temperature plays a pivotal role in controlling coral calcification, with contingent influences from volcanic activity and solar radiation. Notably, the linear extension and calcification rates were significantly reduced during the Current Warm Period, suggesting a surpassing impact of contemporary human activities over the natural variability on coral calcification. This raises concerns about the future prospects of coral reefs in the face of ongoing climate change and increasing human-activity impacts.</span></p>
Variability of the East Asian winter monsoon since mid-late Holocene
<p>Wind speed of the East Asian winter monsoon since 4.4 ka was quantitatively reconstructed at a high temporal resolution (~4 years) based on grain size of a core sediment from a well preserved mud patch in the North Yellow Sea.</p>
~550-year climate periodicity in the Yunnan-Guizhou plateau during the late mid-Holocene: Insights and implications
<p>This is the Supporting Information for Li et al. "550-Year Climate Periodicity in the Yunnan-Guizhou Plateau during the late Mid-Holocene: Insights and Implications" published in Geophysical Research Letters. The data comes from a stalagmite in southwestern China (27° 4' N, 105° 5' E). The dataset includes the speleothem 230Th dating data (Table S1 in Supporting Information S1), the speleothem 230Th dating, 13C, lamina thickness, 18O, Sr/Ca and Mg/Ca data (Table S2), the updated 14C database from archaeological sites in southwestern China (Table S3), the calculated minimal occupation events as the unit of analysis by combining more than one 14C date (Table S4) and the summed 14C probability (SCP) records (Table S5). The Supporting Information S1 includes a pdf file (available through Zenodo) provided also contains details on the methods of all the lab work, the results of the trace elements, the demonstration of annual lamina and application of least-squares fit, the practices of calculating summed 14C probability (SCP) distributions in southwestern China and a discussion on how ENSO and local precipitation can influence the proxies. Additionally, there are supporting figures (Figure S1-S8) for the main text in Supporting Information S1. The speleothem 230Th dating, 13C, lamina thickness, 18O, Sr/Ca and Mg/Ca data in this study are also available in the public paleoclimate database of the National Oceanic and Atmospheric Administration (NOAA) (https://www.ncei.noaa.gov/access/paleo-search/study/38059).</p>
~550-year climate periodicity in the Yunnan-Guizhou plateau during the late mid-Holocene: Insights and implications
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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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Data from: Dynamics of marsh-mangrove ecotone since the mid-Holocene: a palynological study of mangrove encroachment and sea level rise in the Shark River Estuary, Florida
Sea level rise and the associated inland shift of the marsh-mangrove ecotone in south Florida have raised many scientific and management concerns in recent years. Holocene paleoecological records can provide an important baseline to shed light on the long-term dynamics of vegetation changes across this ecotone in the past, which is needed to predict the future. In this study, we present palynological, X-ray fluorescence, and loss-on ignition data from four sedimentary cores recovered from a 20-km marine-to-freshwater transect along the Shark River Estuary, southwest Everglades, to document the patterns and processes of coastal vegetation changes in response to sea level rise since the mid-Holocene. Our record indicates that freshwater marsh progressively replaced marl prairies at the Shark River Estuary between 5700 and 4400 cal yr BP. As marine transgression continued, marine influence reached the threshold necessary for mangroves to establish at the current mouth of the Shark River Slough at 3800 cal yr BP. During the next 3000 years, although sea level rise in the Western North Atlantic slowed down to 0.4 mm/yr, a spatial and temporal gradient was evident as the marsh-mangrove ecotone shifted inland by 20 km from 3800 to 800 cal yr BP, accompanied by a gradual landward replacement of freshwater marsh by mangrove forest. If sea level continues to rise at 2.33 mm/yr in the 21st century in south Florida, it is possible that marine influence will reach the threshold for mangroves to establish in the central Everglades, and we could expect a much more aggressive mangrove encroachment toward the northern and interior parts of south Florida in the next few centuries.
The isotopic composition of the French Illimani ice core in the Bolivian Andes supports the east-west South American precipitation dipole from the last deglaciation to the mid-Holocene
<p>Isotopic composition (deuterium and deuterium excess) of the French Illimani ice core drilled in 1999 with a revised dating detailed in the following manuscript:</p> <p>Françoise Vimeux and Amaëlle Landais, 2025. The isotopic composition of the French Illimani ice core in the Bolivian Andes supports the east-west South American precipitation dipole from the last deglaciation to the mid-Holocene. Quaternary Science Reviews 347, https://doi.org/10.1016/j.quascirev.2024.109098.</p>
Data for "Climate outweighs human effects on vegetation properties during the early-to-mid Holocene"
<p>Data for analyses used in the PastHumanImpact project published in a manuscript "Climate outweighs human effects on vegetation properties during the early-to-mid Holocene". <br><br>All R code and workflows to reproduce the data analyses and figures are available at <a href="https://github.com/HOPE-UIB-BIO/PastHumanImpact" target="_blank" rel="noopener">HOPE-UIB-BIO/PastHumanImpact</a>.<br><br><strong>Usage:</strong><br>Each zip file should be extracted and placed into the `Data` folder, following the README file in the mentioned GitHub repo.<br><br>❗The data is under a CC BY-NC-ND licence, which requires approval from data owners before use (read <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode" target="_blank" rel="noopener">here </a>for more details). Specifically, please contact Xianyong Cao (<a href="mailto:xcao@itpcas.ac.cn" target="_blank" rel="noopener">xcao@itpcas.ac.cn</a>) to share the Asian fossil pollen data.❗<br><br><strong>Citation</strong>:<br>If you want to use the data, please cite the mentioned paper "Felde et al. Climate outweighs human effects on vegetation properties during the early-to-mid Holocene". DOI: <a title="Climate outweighs human effects on vegetation properties during the early-to-mid Holocene" href="https://doi.org/10.21203/rs.3.rs-4692574/v1" target="_blank" rel="noopener">10.21203/rs.3.rs-4692574/v1</a></p>
Mid-Holocene ENSO Variability reduced by northern African vegetation changes: a model intercomparison study
<p>This dataset contains model outputs from four climate models: EC-Earth, iCESM, UofT-CCSM4 and GISS. For each model, data is provided for three simulations: pre Industrial (PI), reference mid-Holocene without Green Sahara (MH_PMIP), and mid-Holocene with Green Sahara (MH_GS). For each simulation, data is provided for the variables: surface temperature, precipitation and zonal wind strength.</p>
AWI-CM3 output of mid-Holocene and pre-industrial experiments
<p>This repository contains the AWI-CM3 output of the pre-industrial (PI) and mid-Holocene (MH) experiments.</p> <p>Files description</p> <p>2t=> surface air temperature (2m)<br> a_ice=> sea ice concentration<br> radiation: radiation: components of Arctic surface energy budget</p> <p>PI and MH both contains 5 ensemble runs, which are labeled as 001-005.</p> <p>For more data details, please refer to the self-describing information of NetCDF files.</p>
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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)
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.