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4,462 results for “South America”
FIGURE 1. Chusquea yungasensis. A. Culm leaf. B. Central bud and subsidiary branches. C. Branching and foliage leaves. D in Chusquea yungasensis (Bambusoideae, Poaceae): a new species of woody bamboo from South America and the first record of subgenus Rettbergia in Bolivia
FIGURE 1. Chusquea yungasensis. A. Culm leaf. B. Central bud and subsidiary branches. C. Branching and foliage leaves. D. Detail of the foliage leaf sheath, pseudopetiole and abaxial base of the foliage leaf blade. E. Fertile branch. F. Detail of the synflorescence. G. Spikelet. (A, E–G: Jiménez 5848; B–D: Jiménez 5694.) (Illustration by Lucas Marinho)
FIGURE 2. A in Lectotypifications in species of Chusquea (Poaceae, Bambusoideae, Bambuseae) from southern South America
FIGURE 2. A. Lectotype of Chusquea uruguayensis Arechav. (J. Arechavaleta s.n., MVM 5121), photo: Manuel García (MVM). B. Lectotype of Chusquea valdiviensis E. Desv. (C. Gay 292, P 00625444, obtained from http://plants.jstor.org/specimen/p00625444?s=t).
FIGURE 1. A in Lectotypifications in species of Chusquea (Poaceae, Bambusoideae, Bambuseae) from southern South America
FIGURE 1. A. Lectotype of Chusquea phacellophora Pilg. (C. Jürgens 511, US 2874644). B. Lectotype of Chusquea tenella Nees (J. Lhotsky s.n., US 2874662). ©Smithsonian Institution.
FIGURES 12–20 in Planothidium lagerheimii comb. nov. (Bacillariophyta, Achnanthales) a forgotten diatom from South America
FIGURES 12–20. SEM images of Planothidium lagerheimii comb. nov. Fig. 12. External view of rapheless valve. Fig. 13. Internal view of raphe valve. Fig. 14. External view of raphe valve. Fig. 15. Internal view of rapheless valve. Fig. 16. Detail of well-developed helictoglossa. Fig. 17. Detail of rapheless valve showing conspicuous grooves and multiseriate striae. Fig. 18. Internal detail of thick silicified virgae of rapheless valve. Fig. 19. Internal detail of uniseriate striae of raphe valve. Fig. 20. Internal detail of rapheless valve showing a well-developed cavum.
FIGURES 1–11. Planothidium lagerheimii comb. nov. Figs 1–6 in Planothidium lagerheimii comb. nov. (Bacillariophyta, Achnanthales) a forgotten diatom from South America
FIGURES 1–11. Planothidium lagerheimii comb. nov. Figs 1–6: Reproduction of original drawings. Figs 1–2. Cocconeis lagerheimii Cleve (1894b, pl. 3, figs 21–22). Figs 3–4. Cocconeis rudis Frenguelli (1953, pl. 1, figs 11–12). Figs 5–6. Achnanthes salvadoriana Hustedt (1953, fig. 1). Figs 7–11. LM images of Planothidium lagerheimii population from southern Brazil (Rio Grande do Sul, Santa Cruz do Sul, Preto Stream, Rio Pardo hydrographical basin).
FIGURE 3 in Three new species of Ficus (Moraceae) from Central and northern-South America
FIGURE 3. Illustration of F. plectonervata showing intersecondary parallel veins. Based on García et al. 78 (MO), drawn by N. Medina.
FIGURE 5 in Three new species of Ficus (Moraceae) from Central and northern-South America
FIGURE 5. Scanning Electronic Microscopy of Ficus plectonervata (García et al. 78). A. Fig surface (500x). B. Bracts outer surface (1600x). C. Leaf lower surface (2000x). D. Leaf lower surface (1200x). Note the patent hairs on every surface scanned (white arrows).
FIGURE 2 in Three new species of Ficus (Moraceae) from Central and northern-South America
FIGURE 2. Illustration of F. palmarensis showing the unusual position of the gland (arrows) beneath the leaves. Based on Forero et al. 2857 (COL), drawn by N. Medina.
FIGURE 4. A–D F in Three new species of Ficus (Moraceae) from Central and northern-South America
FIGURE 4. A–D F. nebulosilvana fig (Gentry 2575). A. Apical view. B. Basal view. C. Lateral view. D. Longitudinal section. E–H F. palmarensis fig (Forero et al. 2857). E. Apical view F. Basal view. G. Lateral view. H. Longitudinal section. I–L F. plectonervata fig (García et al. 78). I. Apical view. J. Basal view. K. Lateral view. L. Longitudinal section. (o- Ostiole, p- Peduncle, bb- Basal Bracts, ob- Ostiole Bracts, ff- Female Flowers). Note the different lengths of the flower peduncles on the figs sections, only female flowers are observed (Photos Orlando Rivera-Diaz).
Data from: Introduced beaver improve growth of non–native trout in Tierra del Fuego, South America
<p>Species introductions threaten ecosystem function worldwide and interactions among introduced species may amplify their impacts. Effects of multiple invasions are still poorly studied and often the mechanisms underlying potential interactions among invaders are unknown. Despite being a remote and well–conserved area, the southern portion of South America has been greatly impacted by invasions of both the American Beaver (Castor canadensis) and Brown Trout (Salmo trutta fario). Here, we compared growth, condition, diet, and stable isotopes of sulfur δ34S, nitrogen δ15N, and carbon δ13C for stream-living Brown Trout from streams with (n = 6) and without (n = 6) beaver in Tierra del Fuego, Chile. We show that beaver may facilitate the success of trout by positively influencing fish growth. Beaver indirectly provide greater food subsidies (i.e., macroinvertebrate abundances) by modifying the local aquatic environment through active dam and lodge building suggesting a one–way positive interaction. Trout in beaver-influenced streams occupied a slightly higher trophic level with more depleted sulfur and carbon isotopic ratios suggesting that food web pathways rely on secondary production from autochthonous origin. Trout in beaver-influenced streams have a wider dietary breadth with diptera and amphipoda as the prey items providing most of the energy whereas in streams without beaver, trichoptera were the main source of energy for trout. Although these two invaders have never co-occurred naturally, their ecosystem function and the beneficial influences of coexisting life histories reported in their native ranges are similar to our findings from invaded systems.</p>
FIGURE 1. Pourouma bergii. A. Leafy twig with infructescence. B. Leaf, abaxial surface. C in Pourouma bergii (Urticaceae), a new species from South America
FIGURE 1. Pourouma bergii. A. Leafy twig with infructescence. B. Leaf, abaxial surface. C. Indument of the pistillate perianth. D. Staminate inflorescence. E. Staminate flower. A–C from Vásquez et al. 2809 (MO) and D-E from Aulestia et al. 745 (MO). Scale bar: A = 2 cm; B = 1 cm; C = 0.5 mm; D = 1 cm; E = 1mm. Drawn by Klei Sousa.
FIGURE 2. Pourouma bergii. A. Staminate flower. B in Pourouma bergii (Urticaceae), a new species from South America
FIGURE 2. Pourouma bergii. A. Staminate flower. B. Indument sericeous of the staminate perianth. C. Fruiting perianth, fruit and pedicel. D. Indument. sericeous of the fruiting perianth. A–B from Aulestia et al. 745 (MO) and C–D from Vásquez et al. 2809 (MO). Scale bar: A = 1 mm; B = 50 µm, C = 5 mm, D = 100 µm
FIGURE 4 in Stemodia diplohyptoides (Plantaginaceae, Gratiolae): a new diploid species from South America
FIGURE 4. Mitotic chromosomes in species of Stemodia. A. S. diplohyptoides, 2n=2x=22. B. S. hyptoides, 2n=4x=44. Bar= 2 μm. (A, Sosa et al. 123 CTES; B, Sosa 272 CTES).
FIGURE 1. Stemodia diplohyptoides. A. Habit. B. Stem detail. C in Stemodia diplohyptoides (Plantaginaceae, Gratiolae): a new diploid species from South America
FIGURE 1. Stemodia diplohyptoides. A. Habit. B. Stem detail. C Detail of a stem. D. Flower. E. Corolla (inner view). F. Long stamen. G. Short stamen. H. Detail of ovary. I. Node with fruits. J. Fruit. K. Detail of sepal. L. Detail of fruit (A-L: Sosa et al. 123 CTES, illustrated by Mirtha Gómez).
FIGURE 3 in Stemodia diplohyptoides (Plantaginaceae, Gratiolae): a new diploid species from South America
FIGURE 3. Seed morphology observations under SEM of Stemodia. A, B. Seed and detail of ornamentation on the seed surface of S. diplohyptoides. C, D. Seed and detail of ornamentation on the seed surface of S. hyptoides. (A-B: Sosa & Keller 121 CTES; C-D, Sosa 134 CTES).
Figure 11 in Integrative taxonomy of the gymnophthalmid lizard Neusticurus rudis Boulenger, 1900 identifies a new species in the eastern Pantepui region, north-eastern South America
Figure 11. Habitat of Neusticurus arekuna sp. nov. (a) Type locality on the summit of Angasimatepui, Venezuela (looking east, May 2011). (b) Stream on the southern slope of the Serra Pacaraima, Roraima state, Brazil (May 2011). Photos PJRK (a) and SMS (b).
Figure 12 in Integrative taxonomy of the gymnophthalmid lizard Neusticurus rudis Boulenger, 1900 identifies a new species in the eastern Pantepui region, north-eastern South America
Figure 12. Variation in the Neusticurus arekuna clade. (a) Male N. arekuna UCS 1 from Abakapá-tepui, Venezuela (IRSNB18150). (b) Female N. arekuna UCS 3 from Auyán-tepui (IRSNB18455). (c) Male N. arekuna UCS 1 from Chivatón, Venezuela (IRSNB18452). (d) Female N. arekuna UCS 2 from La Escalera, Venezuela (IRSNB18111). Photos PJRK.
Figure 10 in Integrative taxonomy of the gymnophthalmid lizard Neusticurus rudis Boulenger, 1900 identifies a new species in the eastern Pantepui region, north-eastern South America
Figure 10. Variation among paratypes of Neusticurus arekuna sp. nov. (a) Female holotype in life (IRSNB2687). (b) Male paratype from Pacaraima, Brazil, in life (MZUSP106223). (c) Female paratype from Pacaraima, Brazil, in life (MZUSP106224). (d) Female paratype from Pacaraima, Brazil, in life (MZUSP106227). Photos PJRK (a), SMS (b–d).
Figure 9 in Integrative taxonomy of the gymnophthalmid lizard Neusticurus rudis Boulenger, 1900 identifies a new species in the eastern Pantepui region, north-eastern South America
Figure 9. Holotype of Neusticurus arekuna sp. nov. (IRSNB2687) in preservative (a) Ventral view of head. (b) Lateral view of head. (c) Dorsal view of head. (d) Ventral view of body. (e) Dorsal view of body. Photos PJRK.
Figure 8. Neusticurus rudis UCS 2 in Integrative taxonomy of the gymnophthalmid lizard Neusticurus rudis Boulenger, 1900 identifies a new species in the eastern Pantepui region, north-eastern South America
Figure 8. Neusticurus rudis UCS 2 from Iwokrama, Guyana. (a) ventral view of a male immediately after euthanasia (IRSN18440). (b) ventral view of a female immediately after euthanasia (IRSNB18441). Photos PJRK.
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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.