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609 results for “Critically endangered”
Genetic differentiation of a critically endangered population of the limpet Patella candei candei d'Orbigny, 1840, in the Canary Islands
<p>The adoption of measures to protect the viability of threatened populations should be supported by empirical data identifying appropriate conservation units and management strategies. The global population of the majorera limpet, <em>P. candei candei</em> d'Orbigny, 1840, is restricted to the Macaronesian islands in the NE Atlantic, including near-to-extinct and healthy populations in Fuerteventura and Selvagens, respectively. The taxonomic position, genetic diversity and intra- and interspecific relationships of these populations are unclear, which is hindering the implementation of a recovery plan for the overexploited majorera limpet on Fuerteventura. In this study, ddRAD-based genome scanning was used to overcome the limitations of mitochondrial DNA-based analysis. As a result, <em>P. candei candei</em> was genetically differentiated from the closely related <em>P. candei crenata</em> for the first time. Moreover, genetic differentiation was detected between <em>P. candei candei</em> samples from Selvagens and Fuerteventura, indicating that translocations from the healthy Selvagens source population are inadvisable. In conclusion, the majorera limpet requires population-specific management focused on the preservation of exceptional genetic diversity with which to face future environmental challenges.</p>
Threatened and endangered bird species and critical habitats in US cities
<p>Cities have classically been viewed as biologically impoverished, homogenized, and simplified systems that harbor low value for biodiversity. However, recent work has demonstrated that cities are critical ecological systems that provide important services to humanity and biodiversity. Cities can play vital roles in conserving biodiversity as well as habitats, providing system stability, and offering direct opportunities for people to engage with nature. In a rapidly changing world with biodiversity loss at an all-time high, cities have the potential to act as sanctuaries for biodiversity conservation. Here, we propose a "cities as sanctuaries" concept, which demonstrates the importance of cities for ecology and conservation, and provide the groundwork for advancing this novel field of study.</p>
Supplementary material for: UAV-assisted counts of group size facilitate accurate population surveys of the Critically Endangered cao vit gibbon Nomascus nasutus
<p>Supplementary Material for the journal article "UAV-assisted counts of group size facilitate accurate population surveys of the Critically Endangered cao vit gibbon <em>Nomascus nasutus</em>", published in <em>Oryx</em>.</p> <p><strong>Caption: </strong>Video footage of cao vit gibbon <em>Nomascus nasutus</em> family groups taken with an unoccupied aerial vehicle (UAV). The footage from the thermal and RGB cameras on the UAV is shown side-by-side to facilitate comparison between the two sensor types. The video is also available at: www.youtube.com/watch?v=J7VpnvdUT4A.</p>
FIGURE 7 in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 7. Maximum likelihood tree presenting the relationship between Androcalymma, few species of Dicorynia, Dialium, and one representative of other 13 Dialioideae genera. Only clades with 60% or higher bootstrap values (represented above each node) are shown. At the center a short representation of the clade containing Androcalymma, Dicorynia, and Dialium with examples of flowers (left) and a floral diagram (right) of each group. Note the trimerous corolla of Dicorynia, the pentamerous one of Androcalymma and the absence of corolla in most species of Dialium, represented here by an American and an Asian species. Also note two stamens in Dicorynia and most Dialium species and four stamens in Androcalymma. Photos: D. platysepalum: Cerlin Ng; D. guianensis: Herve Galliffet; D. paraensis; A. glabrifolium, D. guianense and the floral diagrams and trees: Marcus Falc"o.
FIGURE 8. Morphological comparisons between Androcalymma and Dicorynia. A in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 8. Morphological comparisons between Androcalymma and Dicorynia. A. Stamen of A. glabrifolium; B. Stamen of D. paraensis. Note the thick filament and the similar basifixed insertion which differs for being apiculate only in Androcalymma; Abaxial face of the leaflet base in C. A. glabrifolium; and in D. D. guianensis; Detail of inflorescence in E. A. glabrifolium; and in F. D. paraensis; Floral buds in G. A. glabrifolium; and in H. D. paraensis. Note the unusual imbrication of sepals; I. Fruits in D. paraensis; J. Detail of the flat and elliptical carpel in A. glabrifolium. Note the reduced style; K. Similar but more elongated carpel in D. paraensis. A: Falcão, M.J 265; B, K: Falcão, M.J. 268; C, E, G, J: Krukoff, B. 9005; D: Billiet, F. 4375; F: Amaral, I.L 618; H: Cid, C.A. 3564; I: Falcão, M.J. 91. Scale bar. A, J: 1 mm; B, K: 5 mm; C–D, G–H: 7 mm; E–F, I: 1cm. Source. A–B, G–K: Marcus Falc"o; C–F: Reflora.
FIGURE 6. Androcalymma glabrifolium. SEM images. A in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 6. Androcalymma glabrifolium. SEM images. A. Flower bud; B–C. Flower in pre-anthesis with the perianth removed. Note the anthers covering the gynoecium but not yet inflexed; D. side view of anther still closed; E. Front and side view of a stamen at anthesis, note the inflexed anthers. F. Detail of anther with the two open pores; G. Detail of the anther still closed. H Filament with anther removed and apiculate apex; I. Detail of anther surface showing uncinate trichomes and stomata; J. Polar and equatorial view of the pollen grains; K. Side view of the carpel; L. side view of a young fruit, note the reduced wing forming at the left; M. Detail of the ovules; N. Detail of carpel surface showing uncinate and straight trichomes; O. Detail of the stigma and short style; P. Detail of the receptacle with petals, stamens and carpel removed. Note the shallow hypanthium. Scale bar. A–B, E, K–L: 500 µm; C, P: 200 µm; D, F–H, M, O: 100 µm; I: 20 µm; J: 2 µm; N: 50 µm. A–P: Falcão, M.J. 265; Photos: M. Falc"o.
FIGURE 5. Androcalymma glabrifolium. A in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 5. Androcalymma glabrifolium. A. Detail of the flower, polar view; B. side view; C. Detail of senescent flowers without petals and stamens showing the heteromorphy of the five sepaled calyx; D. Inflorescence with young fruits; E–F: Immature fruits at different sizes. Scale bar. A–C: 0.5 cm; D: 2 cm; E–F: 1 cm. A–F: Falcão, M.J. 265; Photos: M. Falc"o
FIGURE 2. Androcalymma glabrifolium. A in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 2. Androcalymma glabrifolium. A. Leaf; B. Axillary bud at the base of the leaf; C. Detail of the petiolule and base of the terminal leaflet; D. Inflorescence; E. Immature flower bud; F. Flower bud at pre-anthesis; G. Flower, polar view; H. Flower, side view; I. Abaxial sepal; J–K. The two adaxial sepals; L. One of the two lateral sepals; M. Flower without petals and stamens, polar view; N. Flower in pre-anthesis without sepals and petals, lateral view; O. Stamen, side view; P. Anther with open pores, frontal view; Q. Tip of the apiculate filament without anther; R. Longitudinal cut of the carpel showing three ovules; S. Detail of the stigma; T. Young fruit. A–T: Falcão, M.J. 265; Drawn by M. Falc"o.
FIGURE 4. Androcalymma glabrifolium. A–C in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 4. Androcalymma glabrifolium. A–C. Distichous thyrsoids inflorescences; D. Senescent thyrsoid with flowers presenting only sepals and carpels; E. Subthyrsoid apex with distichous cymose subunits; F–I. Flowers in anthesis, flower buds and senescent flowers containing sepals and carpel, note the inflexed anthers pointing to the gynoecium in I. Scale bar. A–D: 2 cm; E–H: 0.5 cm; I: 0.25 cm. A–I: Falcão, M.J. 265; Photos: M. Falc"o.
FIGURE 3. Androcalymma glabrifolium. A in Unraveling the Enigma of Androcalymma (Fabaceae: Dialioideae): The Rediscovery of a Critically Endangered Legume Genus in the Heart of the Amazon
FIGURE 3. Androcalymma glabrifolium. A. Emergent tree; B. Detail of the base of the trunk; C. Detail of the bark; D. Cut section of the bark; E. Detail of the branch showing the insertion of leaves and small axillary buds; F. Detail of fallen branch with leaves and inflorescences; G. Leaf detail; H. Leaflet detail, adaxial side; I. Leaflets detail, abaxial side. Scale bar. A–B, F: 10 cm; C, G–I: 4 cm; D–E: 1 cm. A–I: Falcão, M.J. 265; Photos: M. Falc"o.
Fig. 6 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 6. Heatmap representing organ specific significantly enriched genes corresponding to (A) Isosteroidal alkaloid biosynthesis, (B) Sucrose and starch metabolism, (C) UGTs and CYPs, (D) aquaporins, (E) ABC transporters, (F) Transcription factor and Transposable elements. The red-blue scale represents positive enrichment (red) and negative enrichment (Blue) of transcripts. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 5 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 5. Significantly enriched transcripts (nodes) in predicted interactome network. (A) Steroidal alkaloid biosynthesis pathways (B) Isopentenyl diphosphate biosynthesis pathway, (C) Sucrose and starch metabolic pathways and (D) Aquaporins. The nodes encircled in red color represents higher enrichment in the bulb while the nodes encircled in grey and blue represents higher enrichment in arial organs (leaf and stem). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 7 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 7. qRT-PCR expression-based validation of RNA-seq data using potential 20 genes involved in isosteroidal alkaloid biosynthetic pathway. (A) Bulb vs. Leaf, (B) Leaf vs. Stem and (C) Bulb vs. Stem.
Fig. 3 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 3. Significant KEGG pathway enrichment analysis in tissues from aerial organs (leaf & Stem) and bulb. The green colour enrichment indicates higher expression in aerial tissue while pink represents higher enrichment in bulb. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 4 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 4. Transcriptional protein-protein interactome (PPIN) prediction in F. roylei along the network statistics. (A) Overall prediction of PPI network based on significantly differential expressed transcripts. Spatial PPI network prediction of significantly enriched transcripts in (B) Bulb, (C) Leaf and (D) Stem.
Fig. 1 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 1. Summary of organ specific spatial transcriptome sequencing in F. roylei. (A): Overall quality filtering of sequenced reads; (B): Tissue specific high quality filtered reads obtained after removing low quality/adaptor contaminated sequences; (C): Assembly statistics details; (D): Venn diagram representing functional annotation with six different public protein databases.
Fig. 8 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 8. Representation of isosteroidal alkaloid biosynthesis pathway in F. roylei and heat map representing expression of genes in Stem, Leaf and Bulb tissue using red-blue scale (red: positive enrichment and Blue: negative enrichment of transcripts). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 2 in Genome-wide transcriptional analysis unveils the molecular basis of organ-specific expression of isosteroidal alkaloids biosynthesis in critically endangered Fritillaria roylei Hook
Fig. 2. Clustering of 2488 significant differentially expressed transcripts in leaf, stem and bulb in F. roylei (A) sub-cluster 1 represent transcripts with significant higher expression in bulb; (B): Sub-cluster 2 in Stem and (C): Sub-cluster 3 in leaf; (D): Pearson's correlation of organ specific significant differentially expressed clustered transcripts in leaf, stem and bulb tissues.
FIGURE 7 in Critical review of "Monograph of Ceratozamia (Zamiaceae, Cycadales): an endangered genus" published in PhytoKeys 208: 1-102 (2022)
FIGURE 7. Holotype of Ceratozamia dominguezii Pérez-Farr. & Gut.Ortega (M.A. Pérez-Farrera 4013 (HEM!)) (photos by Miguel Angel Pérez-Farrera; used with permission).
FIGURE 4 in Critical review of "Monograph of Ceratozamia (Zamiaceae, Cycadales): an endangered genus" published in PhytoKeys 208: 1-102 (2022)
FIGURE 4. Ceratozamia osbornei in cultivation at Fairchild Tropical Botanic Garden in Coral Gables, FL, USA. A. Large, mature female plant. B. Multi-stemmed, arborescent caudex of large, mature female plant being relocated. C. Large receptive ovulate cone.
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Allen Brain Atlas
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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.