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17 results for “Orchid conservation”
Figure 1. A in Habitat description of the rare orchid Didymoplexis verrucosa for more effective conservation
Figure 1. A, Location of the province of KwaZulu-Natal within South Africa; B, northern KwaZulu-Natal showing the very limited extent of remaining forest ecosystems shaded in black with degree grid lines for spatial reference; C, study area shaded in grey south of the coastal town of Mtunzini with quarter degree grid lines for spatial reference.
Datasets for: Climate change and conservation of Caladenia orchids in Western Australia
<p>Occurence data for 26 <em>Caladenia </em>species for the paper: "<strong>Climate change and conservation of Caladenia orchids in Western Australia" </strong></p> <p><strong>Abstract</strong></p> <p>Understanding how species distributions are being shaped by current rises in atmospheric temperature is of immediate conservation importance. Orchids are a globally threatened plant family, with many species having narrow ranges and low abundances that heighten extinction risk due to rising atmospheric temperature. Using 26 rare and common <em>Caladenia </em>orchid species in Western Australia, we first performed a conservation assessment by calculating the proportion of populations that currently occur in conservation areas. We then compared current range extents with past and future climate scenarios. We performed a niche overlap test with a future climate scenario to test how the current population level climatic niche of these species will change. As some of these orchids frequently hybridize, we then quantified how ecogeographical isolation will change under future climates. Only 27% of all <em>Caladenia </em>populations are currently found in protected areas. Most species had reduced range extents in historically warmer climates. However, only three species will experience range extent contractions under future climate scenarios. The current population climatic niche has a 36% overlap with future climates, indicating that current population level conditions may change. Ecogeographical isolation will potentially increase in hybridizing species, thereby acting as a stronger barrier against hybridization. As <em>Caladenia </em>species evolved in seasonally dry conditions, this suggests that there is potential preadaptation to survive under elevated temperatures. Despite their physiological tolerances to elevated temperature, conservation of <em>Caladenia </em>species will depend on the availability of habitat to allow migration within future range limits, and the presence of their key mutualists. </p>
Genetic structure and diversity of the declining orchid Gymnadenia conopsea in Scandinavia: Implications for conservation and management
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Sustainable harvesting and conservation of Laelia furfuracea, a rare epiphytic orchid from Oaxaca, Mexico
Many epiphytic orchids are harvested in Mexico for different purposes. Laelia furfuracea is one of the most intensively traded species. Its inflorescences are used as ornaments during the December festivities. We investigated the effect of severing the flowering pseudobulb. This is the traditional technique frequently used by collectors at the study area. We wished to investigate its effects on the production of new pseudobulbs, as well as on their size and flowering probability. Also, we examined the survival probability and growth of individuals that had fallen on the ground to evaluate their potential as trading resources. Inflorescence collection did not affect the production of new pseudobulbs the following season. However, it affected the size of these pseudobulbs, as well as their flowering probability. Yet, the direction of this effect was not consistent between years. Nearly six percent of all L. furfuracea plants at the study site were found on the ground. Over 80 percent of them survived for at least two years, although most of them showed pseudobulb loss over that period of time. We conclude that harvesting of flowering pseudobulbs may be sustainable in terms of its effects on plant performance, at least in the short term. The active management of plants that have fallen on the ground may reduce the harvesting pressure on natural populations. Harvesting of flowering pseudobulbs may diminish some aspects of plant performance, but its effects need to be evaluated with complete life cycle data and take into account interannual variation in vital rates.
Data from: Conservation genetics of Neotropical pollinators revisited: microsatellite analysis suggests that diploid males are rare in orchid bees
Allozyme analyses have suggested that Neotropical orchid bee (Euglossini) pollinators are vulnerable because of putative high frequencies of diploid males, a result of loss of sex allele diversity in small hymenopteran populations with single locus complementary sex determination. Our analysis of 1010 males from 27 species of euglossine bees sampled across the Neotropics at 2-11 polymorphic microsatellite loci revealed only 5 diploid males at an overall frequency of 0.005 (95% CIs 0.002-0.010); errors through genetic non-detection of diploid males were likely small. In contrast to allozyme-based studies, we detected very weak or insignificant population genetic structure, even for a pair of populations >500 km apart, possibly accounting for low diploid male frequencies. Technical flaws in previous allozyme-based analyses have probably led to considerable overestimation of diploid male production in orchid bees. Other factors may have a more immediate impact on population persistence than the genetic load imposed by diploid males on these important Neotropical pollinators.
FIGURE 5 in Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions
FIGURE 5. (A). Habenaria pterocarpa (B). Ipsea speciosa (C). Liparis elliptica (D). Liparis brachyglottis (E). Podochilus warnagalensis (F). Zeuxine reginasilvae.
FIGURE 4 in Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions
FIGURE 4. (A). Acanthephippium bicolor (B). Aerangis hologlottis (C). Anoectochilus regalis (D). Arundina minor (E). Didymoplexis pallens (F). Habenaria dolichostachya.
Data from: Conservation genetics of Neotropical pollinators revisited: microsatellite analysis suggests that diploid males are rare in orchid bees
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Data from: Matching symbiotic associations of an endangered orchid to habitat to improve conservation outcomes
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Sustainable harvesting and conservation of Laelia furfuracea, a rare epiphytic orchid from Oaxaca, Mexico
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Figure 2 from: Simo-Droissart M, Stévart T, Sonké B, Mayogo S, Kamdem N, Droissart V (2018) New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa. PhytoKeys 98: 85-97. https://doi.org/10.3897/phytokeys.98.23511
Figure 2 Habitat degradation and forest clearance at the type locality of Calyptrochilum aurantiacum (Mungo River Forest Reserve). In less than 10 years, hundreds of hectares of mature lowland rainforest have been converted to cocoa plantations along the Mungo River (pers. comm. by local communities). A Freshly cleared forest where plantain and bananas will be cultivated during two years prior to being replaced by cocoa trees. B A ten-year old cocoa plantation on the banks of the Mungo River; only a few shade trees remain from the original forest. C Plantain and banana bunches that are harvested every day along the Mungo River. Photographs by V. Droissart (June 2017).
Figure 1 from: Simo-Droissart M, Stévart T, Sonké B, Mayogo S, Kamdem N, Droissart V (2018) New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa. PhytoKeys 98: 85-97. https://doi.org/10.3897/phytokeys.98.23511
Figure 1 Current distribution of Calyptrochilum aurantiacum in Central Africa (upper map) and in Cameroon (lower map). WS = Wildlife Sanctuary; FR = Forest Reserve; NP = National Park.
Figure 4 from: Simo-Droissart M, Stévart T, Sonké B, Mayogo S, Kamdem N, Droissart V (2018) New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa. PhytoKeys 98: 85-97. https://doi.org/10.3897/phytokeys.98.23511
Figure 4 Seed banking of Calyptrochilum aurantiacum in Yaoundé (Cameroon). In 2017, an ex situ conservation programme was initiated to support the long term preservation of C. aurantiacum. A Due to the small size of the flowers, manual pollination has been performed under a stereomicroscope. B Fruit development and maturation takes place in a shadehouse established in Yaoundé. C Finally, viable seeds have been harvested and conserved in the freezer (-20°C). Before being preserved at low temperature, seed viability is assessed using the tetrazolium test (red colouration of living embryo). Photographs A and C by V. Droissart, B by Gyslène Kamdem.
Figure 3 from: Simo-Droissart M, Stévart T, Sonké B, Mayogo S, Kamdem N, Droissart V (2018) New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa. PhytoKeys 98: 85-97. https://doi.org/10.3897/phytokeys.98.23511
Figure 3 Ecology and habit of natural populations of Calyptrochilum aurantiacum. A Flowering individual growing on upper branches of a felled kola tree, along with the angraecoid orchid Diaphananthe plehniana and the fern Microgramma owariensis. B Dense population growing on 1 metre long branches of Duguetia staudtii. C Calyptrochilum aurantiacum and Diaphananthe plehniana growing side by side on Salacia sp. (Celastraceae). Photographs by V. Droissart (June 2017).
FIGURE 3 in Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions
FIGURE 3. Categorization of species based on assigned NSCs
FIGURE 2 in Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions
FIGURE 2. Occurrence of orchid species in different sites during the study period.
FIGURE 1 in Evaluating the occurrence and conservation statuses of Sri Lankan Orchids (Orchidaceae): Observations on newly recorded species and undocumented regions
FIGURE 1. The map of Sri Lanka showing the locations of the visited sites during the study period.
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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.