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721 results for “ABI”
Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Image of Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Abies fraseri (Pinaceae) - cone - male
Image of Abies fraseri (Pinaceae) - cone - male
Abies fraseri (Pinaceae) - whole tree - general
Image of Abies fraseri (Pinaceae) - whole tree - general
Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Image of Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Image of Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Image of Abies fraseri (Pinaceae) - leaf - showing orientation on twig
Ecoregion and community structure influences on the foliar elemental niche of balsam fir (Abies balsamea (L.) Mill.) and white birch (Betula papyrifera Marshall)
<p><strong><span>Context</span></strong><span>: Changes in foliar elemental niche properties, defined by axes of carbon (C), nitrogen (N), and phosphorus (P) concentrations, reflect how species allocate resources under different environmental conditions. For instance, elemental niches may differ in response to large-scale latitudinal temperature and precipitation regimes that occur between ecoregions and small-scale differences in nutrient dynamics based on species co-occurrences at a community level.</span></p> <p><strong><span>Methods</span></strong><span>: at a species level, we compared foliar elemental niche hypervolumes for balsam fir (<em>Abies balsamea</em> (L.) Mill.) and white birch (<em>Betula papyrifera</em> Marshall) between a northern and southern ecoregion. At a community level, we grouped our focal species using plot data into conspecific (i.e., only one focal species is present) and heterospecific groups (i.e., both focal species are present) and compared their foliar elemental concentrations under these community conditions across, within, and between these ecoregions. Between ecoregions at the species and community level, we expected niche hypervolumes to be different and driven by regional biophysical effects on foliar N and P concentrations. At the community level, we expected niche hypervolume displacement and expansion patterns for fir and birch, respectively – patterns that reflect their resource strategy.</span></p> <p><strong><span>Results</span></strong><span>: at the species level, foliar elemental niche hypervolumes between ecoregions differed significantly for fir (F = 14.591, p-value = 0.001) and birch (F = 75.998, p-value = 0.001) with higher foliar N and P in the northern ecoregion. At the community level, across ecoregions, the foliar elemental niche hypervolume of birch differed significantly between heterospecific and conspecific groups (F = 4.075, p-value = 0.021) but not for fir. However, both species displayed niche expansion patterns, indicated by niche hypervolume increases of 35.49% for fir and 68.92% for birch. Within the northern ecoregion, heterospecific conditions elicited niche expansion responses, indicated by niche hypervolume increases for fir of 29.04% and birch of 66.48%. In the southern ecoregion we observed a contraction response for birch (niche hypervolume decreased by 3.66%), and no changes for fir niche hypervolume. Conspecific niche hypervolume comparisons between ecoregions yielded significant differences for fir and birch (F = 7.581, p-value = 0.005 and F = 8.038, p-value = 0.001) as did heterospecific comparisons (F = 6.943, p-value = 0.004, and F = 68.702, p-value = 0.001, respectively). </span></p> <p><strong><span>Conclusions</span></strong><span>: our results suggest species may exhibit biogeographical specific elemental niches – driven by biophysical differences such as those used to describe ecoregion characteristics. We also demonstrate how a species resource strategy may inform niche shift patterns in response to different community settings. Our study highlights how biogeographical differences may influence foliar elemental traits and how this may link to concepts of ecosystem and landscape functionality.</span></p>
Text-fig. 2. a, b: Pinus aff. peuce cones. a: Oriolo, MSF 643. b: Tebano, MSF 1021. c: Abies aff. alba cone scale, Oriolo MSF 988. d, e: Tsuga chiarugii cones. d: Oriolo MSF 638. e: Oriolo MSF 979. f, h: Bambusa lugdunensis leaves and leafy axis. f: Oriolo MSF 937. h: Oriolo MSF 651. g: Modern leaf of Yushania for comparison (NMNS Cleared Leaf Database specimen U1347). i: Phragmites sp. Oriolo MSF n.n. Scale bars 50 mm (a, b, h, i), 10 mm (c–g). in The Late Early Pleistocene Flora Of Oriolo, Faenza (Italy): Assembly Of The Modern Forest Biome
Text-fig. 2. a, b: Pinus aff. peuce cones. a: Oriolo, MSF 643. b: Tebano, MSF 1021. c: Abies aff. alba cone scale, Oriolo MSF 988. d, e: Tsuga chiarugii cones. d: Oriolo MSF 638. e: Oriolo MSF 979. f, h: Bambusa lugdunensis leaves and leafy axis. f: Oriolo MSF 937. h: Oriolo MSF 651. g: Modern leaf of Yushania for comparison (NMNS Cleared Leaf Database specimen U1347). i: Phragmites sp. Oriolo MSF n.n. Scale bars 50 mm (a, b, h, i), 10 mm (c–g).
Picea abies (L.) H.Karst. (BR0000009355996)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Picea abies (L.) H.Karst. (BR0000011219040)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Abies lasiocarpa (Pinaceae) - bark - of a medium tree or large branch
Image of Abies lasiocarpa (Pinaceae) - bark - of a medium tree or large branch
Abies lasiocarpa (Pinaceae) - leaf - showing orientation on twig
Image of Abies lasiocarpa (Pinaceae) - leaf - showing orientation on twig
Abies lasiocarpa (Pinaceae) - cone - male
Image of Abies lasiocarpa (Pinaceae) - cone - male
Abies lasiocarpa (Pinaceae) - whole tree - general
Image of Abies lasiocarpa (Pinaceae) - whole tree - general
Abies lasiocarpa (Pinaceae) - whole tree - general
Image of Abies lasiocarpa (Pinaceae) - whole tree - general
Abies lasiocarpa (Pinaceae) - twig - showing attachment of needles
Image of Abies lasiocarpa (Pinaceae) - twig - showing attachment of needles
Abies lasiocarpa (Pinaceae) - cone - male
Image of Abies lasiocarpa (Pinaceae) - cone - male
Abies lasiocarpa (Pinaceae) - leaf - entire needle
Image of Abies lasiocarpa (Pinaceae) - leaf - entire needle
Abies lasiocarpa (Pinaceae) - leaf - showing orientation on twig
Image of Abies lasiocarpa (Pinaceae) - leaf - showing orientation on twig
Abies lasiocarpa (Pinaceae) - leaf - entire needle
Image of Abies lasiocarpa (Pinaceae) - leaf - entire needle
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DANDI Archive for NWB datasets
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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.