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650 results for “angiosperm”
Fig. 3 in The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited
Fig. 3. Pollen Tucanopollis sp. from the stamen on Fig. 2C, which is associated with the vegetative parts of angiosperm Pseudoasterophyllites cretaceus O. Feistmantel ex Velenovský, 1887 from the Late Cretaceous of Les Renardières, France, specimens UL REN 002. A. Monosulcate pollen grain in situ showing irregular sulcus area. B. Microechinate, perforate exine sculpturing, detail of pollen exina. C. Monosulcate pollen grain in situ showing sulcus area. D. Pollen grain in situ showing Ubish bodies. Scale bars: A 10 µm, B–D 1 µm.
FIGURE 8 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 8. Paleopalynological assemblage of the Cuayuca Formation Mcy member and CONISS analysis. Sections were organized considering PAE analysis of Figure 7.
FIGURE 7 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 7. PAE anlaysis between studied sections from the Cuayuca Formation Mcy member: second section, Izúcar de Matamoros (IzS); Tzompahuacan (Tzo); Lagunillas de Rayón (LagRay); Lagunillas (Lag); "B" section, Cuayuca (CyB); "F" section, Izúcar de Matamoros (IzF); "H" section, Izúcar de Matamoros (IzH); Principal section (CyPrincipal); "A" section (CyA).
FIGURE 1 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 1. Location of the nine sections studied from the Cuayuca Formation, Puebla, Mexico. 1, Principal, "A" and "B" sections; 2, "F", "H" and second sections; and 3, Lagunillas, Lagunillas de Rayón and Tzompahuacan sections.
FIGURE 10 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 10. Correlations between two outcrops from the Izucar de Matamoros (F and H sections from the El Calvario) with the stratotype sections from the Cuayuca Formation.
FIGURE 5. Angiosperm pollen grains from the Cuayuca Formation. 1 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 5. Angiosperm pollen grains from the Cuayuca Formation. 1, Polyadopollenites sp. 2, Pb–9334(4): EF R37/ 4; 2-3, Polyadopollenites sp. 1, Pb–9340(1): 101.4/12.6; 4, Landolphia pollen type, Pb–9334(1): EF T41/1; 5, Perisyncolporites sp., Pb–9334(4): EF E44/1; 6, 10, Malpighiaceoidites sp., Pb–9334(4): EF H42/2; 7, 11, Mutisiapollis sp., Pb–8872(3): EF P33/4; 8-9, Striatricolporites sp., Pb–9336(1): EF G32/1; 12, Malvacipollis spinulosa, Pb- 9334(4): 94/7; 13, Ranunculacidites cf. communis, Pb–9334(4): EF D34/1/4; 14-15, Brosipollis sp., Pb–9334(4): EF U41/3; 16, Polyadopollenites sp. 1 Pb–9334(4): EF S39/4; 17, Tubulifloridites sp., Pb–9136(1): EF F39/4; 18, Ulmipollenites sp., Pb–9334(4): EF N40/1; 19, Thomsonipollis sabinetownensis, Pb-9334(4): 94.2/7.4; 20, Sabicea pollen type, Pb–9334(4): EF E42/1; 21, Ranunculacidites operculatus, Pb-9334(4): 101.8/7.2; 22 Rhamnaceaepollenites sp., Pb–9334(4): EF T32/2. Scale bar represents 10 µm.
FIGURE 4. Angiosperm pollen grains from the Cuayuca Formation. 1 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 4. Angiosperm pollen grains from the Cuayuca Formation. 1, Corsinipollenites sp. 1, Pb–9334(1): EF G33/ 3; 2, Corsinipollenites sp. 3, Pb–9334(4): EF R36/1; 3, Corsinipollenites sp. 2, Pb–9334(4): EF T35/3; 4-5, Margocolporites sp., Pb–9340(1): EF N35/3; 6, Margocolporites aff. vanwijhei, Pb-9334(1'): EF T39/2; 7, Monocolpopollenites aff. texensis Nichols, Ames and Traverse 1973 Pb–8872(1A): EF W29/1; 8-9 Rhoipites sp., Pb–8890(1):101.9/17.2; 10, Lymingtonia sp., Pb–9334(4): EF S32/4; 11, Momipites tenuipolus Pb-9334(4): 101.6/12.5; 12, Momipites coryloides, Pb-9138'(1): 92.2/2.8; 13, Fabaceae pollen type 3, Pb–9334(4): EF M34/4; 14, Clavainaperturites sp., Pb– 9147(2): EF R34/2; 15, Linum pollen type, Pb–9334 (1'): EF S33/2; 16, Magnaperiporites sp., Pb–9334(4): EF R39/2; 9. Scale bar represnts 10 µm.
FIGURE 2 in Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico
FIGURE 2. Stratigraphic columns with the location of the palynological samples studied from the Cuayuca Formation, Puebla, Mexico.
FIGURE 1 in Fossil calibration of Magnoliidae, an ancient lineage of angiosperms
FIGURE 1. Simplified phylogenetic tree of Magnoliidae, after Massoni et al. (2014). Hydnoraceae (Piperales) are excluded, because the family was not included in original publications positioning the 10 fossils considered here. Colored boxes summarize the positions of fossils reviewed in the present paper. Their specific positions are figured by small branches with the number of the corresponding fossil at the tip. These correspond to the most parsimonious position(s) found for each fossil in previous phylogenetic analyses (see text for details). The minimum ages provided by the fossils are presented at the nodes they calibrate. The dashed branch refers to the phylogenetic uncertainty about relationships among Hernandiaceae, Lauraceae, and Monimiaceae (the position of Fossil 7 is on a branch not represented here, corresponding to a different set of relationships among these three families). Fossils are numbered following their order in the text. Abbreviations: Ma, million anni.
The global distribution and drivers of wood density across angiosperms and gymnosperms and their impact on forest carbon stocks
<p>Abstract:</p> <div>The density of wood is a key indicator of trees’ carbon investment strategies, impacting productivity and carbon storage. Despite its importance, the global variation in wood density and its environmental controls remain poorly understood, preventing accurate predictions of global forest carbon stocks. Here, we analyze information from 1.1 million forest inventory plots alongside wood density data from 10,703 tree species to create a spatially-explicit understanding of the global wood density distribution and its drivers. Our findings reveal a pronounced latitudinal gradient, with wood in tropical forests being up to ~30% denser than that in boreal forests. In both angiosperms and gymnosperms, hydrothermal conditions represented by annual mean temperature and soil moisture emerged as the primary factors influencing the variation in wood density globally. This indicates similar environmental filters and evolutionary adaptations among distinct plant groups, underscoring the essential role of abiotic factors in determining wood density in forest ecosystems. Additionally, our study highlights the prominent role of disturbance, such as human modification and fire risk, in influencing wood density at more local scales. Factoring in the spatial variation of wood density notably changes the estimates of forest carbon stocks, leading to differences of up to 21% within biomes. Therefore, our research contributes to a deeper understanding of terrestrial biomass distribution and how environmental changes and disturbances impact forest ecosystems.</div> <div> </div> <p>This repository only provides the tif data of this paper. All the codes could be accessed from GitHub: https://github.com/LidongMo/GlobalWoodDensityProject</p>
Linked collectors and determiners for: Some Angiosperm Data of the Forest Herbarium Ibadan (FHI) Nigeria.
Natural history specimen data linked to collectors and determiners held within, "Some Angiosperm Data of the Forest Herbarium Ibadan (FHI) Nigeria". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/0e89ef93-34c2-4942-97f6-9d995edb1f8f">https://bionomia.net/dataset/0e89ef93-34c2-4942-97f6-9d995edb1f8f</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/0e89ef93-34c2-4942-97f6-9d995edb1f8f">https://gbif.org/dataset/0e89ef93-34c2-4942-97f6-9d995edb1f8f</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Angiosperm specimens preserved at NHM, TU, Nepal.
Natural history specimen data linked to collectors and determiners held within, "Angiosperm specimens preserved at NHM, TU, Nepal". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/a2b36e77-a641-496b-8844-eb3e225abe0f">https://bionomia.net/dataset/a2b36e77-a641-496b-8844-eb3e225abe0f</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/a2b36e77-a641-496b-8844-eb3e225abe0f">https://gbif.org/dataset/a2b36e77-a641-496b-8844-eb3e225abe0f</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Phylogenomics and the rise of the angiosperms.
Natural history specimen data linked to collectors and determiners held within, "Phylogenomics and the rise of the angiosperms". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/4195e042-b632-47ba-9545-32a5e3033ff7">https://bionomia.net/dataset/4195e042-b632-47ba-9545-32a5e3033ff7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/4195e042-b632-47ba-9545-32a5e3033ff7">https://gbif.org/dataset/4195e042-b632-47ba-9545-32a5e3033ff7</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Diversity and composition of preserved angiosperm specimens at Tanzania Forestry Research Institute (TAFORI) Herbarium.
Natural history specimen data linked to collectors and determiners held within, "Diversity and composition of preserved angiosperm specimens at Tanzania Forestry Research Institute (TAFORI) Herbarium". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/e5dfbff2-8ce1-4393-8c51-cc9c678ec8be">https://bionomia.net/dataset/e5dfbff2-8ce1-4393-8c51-cc9c678ec8be</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e5dfbff2-8ce1-4393-8c51-cc9c678ec8be">https://gbif.org/dataset/e5dfbff2-8ce1-4393-8c51-cc9c678ec8be</a>. Formatted as a Frictionless Data package.
FIG. 7. — Angiosperms type 1 in A new uppermost Albian flora from Teruel province, northeastern Spain
FIG. 7. — Angiosperms type 1 leaf morphology and venation pattern:A, detail of insect feeding holes in the surface of a leaf; B, complete leaf apical fragment showing feeding holes and fungi black marks; C, nearly complete leaf with characteristic spatulate morphology; D, detail of venation pattern in the apical part of an angiosperm type 1; E, detail of venation pattern in the central part of a leaf. Scale bars: 1 cm.
FIG. 5. — A in Silicified angiosperm wood from the Dangu locality (Ypresian of the Gisors region, Eure, France) - final part: the problem of palaeoclimate reconstruction based on fossil wood
FIG. 5. — A, Dichrostachyoxylon cf. zirkelii (SY7), cross-section; B, Anogeissus sp. (W4), cross-section; C, Dichrostachyoxylon cf. zirkelii (SY7), tangential section; D, Anogeissus sp. (W4), tangential section, detail of a septate fibre (septum indicated by the arrow); E, Anogeissus sp. (W4), tangential section, general view. Scale bars: A, B, 500 µm; C, 100 µm; D, 50 µm; E, 200 µm.
FIG. 2. — A-E in Silicified angiosperm wood from the Dangu locality (Ypresian of the Gisors region, Eure, France) - final part: the problem of palaeoclimate reconstruction based on fossil wood
FIG. 2. — A-E, Grangeonixylon danguense (W1, W2); A, cross-section of the stem form (W2); B, cross-section of the root form (W1); C, stem form in tangential view (W2); D, stem form in tangential view, rays detail (W2); E, root form in tangential view (W1); F-H, cf. Liquidambaroxylon sp. (Wtourbe); F, cross-section (same part, vertically reversed, described in detail in Sakala et al. 1999: fig. 2a); G, tangential section; H, tangential section, detail of scalariform pitting. Scale bars: A, B, 500 µm; C, E, G, 200 µm; D, 150 µm; F, 100 µm; H, 50 µm.
FIG. 4 in Silicified angiosperm wood from the Dangu locality (Ypresian of the Gisors region, Eure, France) - final part: the problem of palaeoclimate reconstruction based on fossil wood
FIG. 4. — Anogeissus sp. (W4), cross-section. Abbreviations: F, fibres; PBT, parenchyma in tangential band; PT, terminal parenchyma; R, rays; V, vessels. Scale bar: 200 µm.
FIG. 3 in Silicified angiosperm wood from the Dangu locality (Ypresian of the Gisors region, Eure, France) - final part: the problem of palaeoclimate reconstruction based on fossil wood
FIG. 3. — Dichrostachyoxylon cf. zirkelii (SY7), cross-section. Abbreviations: F, fibres; PCM, circummedullar parenchym; PV, vasicentric parenchyma; R, rays; V, vessels. Scale bar: 200 µm.
FIG. 1 in Silicified angiosperm wood from the Dangu locality (Ypresian of the Gisors region, Eure, France) - final part: the problem of palaeoclimate reconstruction based on fossil wood
FIG. 1. — Location and overview of the Dangu locality; A, gymnosperm and angiosperm wood; B, palm wood; C, silicified peat, after Koeniguer (1981), modified.
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