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437 results for “threatened species”
Data from: Can threatened species adapt in restored habitat? No expected evolutionary response in lay date for the New Zealand hihi
Many bird species have been observed shifting their laying date to earlier in the year in response to climate change. However the vast majority of these studies were performed on non-threatened species, less impacted by reduced genetic diversity (which is expected to limit evolutionary response) as a consequence of genetic bottlenecks, drift and population isolation. Here we study the relationship between lay date and fitness, as well as its genetic basis, to understand the evolutionary constraints on phenology faced by threatened species using a recently reintroduced population of the endangered New Zealand passerine, the hihi (Notiomystis cincta). A large discrepancy between the optimal laying date and the mode of laying date creates a strong selection differential of -11.24. The impact of this discrepancy on fitness is principally mediated through survival of offspring from hatchling to fledgling. This discrepancy does not seem to arise from a difference in female quality or a trade-off with lifetime breeding success. We find that start of breeding season depends on female age and average temperature prior to the breeding season. Laying date is not found to be significantly heritable. Overall, our research suggests that this discrepancy is a burden on hihi fitness, which will not be resolved through evolution or phenotypic plasticity. More generally, these results show that threatened species introduced to restored habitats might lack adaptive potential and plasticity to adjust their phenology to their new environment. This constraint is also likely to limit their ability to face future challenges, including climate change.
Figure 4 from: Assis L, von Schimonsky DM, Bichuette ME (2021) The first troglobitic Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the karst area of Serra do Ramalho, Brazil: a threatened species. Subterranean Biology 40: 109-128. https://doi.org/10.3897/subtbiol.40.77451
Figure 4 Pseudochthonius ramalho sp. nov. holotype male, habitus A dorsal view B ventral view.
Figure 8 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 8 - Aedeagus, connective, ventral aspect.
Figure 2 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 2 - Habitus, male, lateral aspect.
Figure 3 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 3 - Habitus, female, dorsal aspect.
Figure 6 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 6 - Subgenital plates, ventral aspect, outlined for clarity.
Figure 4 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 4 - Face, ventral aspect, showing variation in amount of pigmentation.
Figure 7 from: Hicks A (2015) In the shadow of a megalopolis, a new Flexamia from a threatened grass species in the New Jersey Pine Barrens (Hemiptera, Cicadellidae, Deltocephalinae, Paralimnini). ZooKeys 511: 69-79. https://doi.org/10.3897/zookeys.511.9572
Figure 7 - Aedeagus, connective, lateral aspect.
Data from: Can threatened species adapt in restored habitat? No expected evolutionary response in lay date for the New Zealand hihi
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FIGURE 3 in Two new species of the millipede family Trichopolydesmidae from Bahia state northeastern Brazil, including a remarkable threatened troglobiont (Diplopoda, Polydesmida)
FIGURE 3. Outcrops of the Serra do Iuiu karst area (left) and a humid habitat (right) close to the entrance to Lapa do Baixão cave. The type locality of Moojenodesmus schubarti sp. nov., Iuiu municipality, Bahia state, Brazil.
FIGURE 1 in Heteranthera yucatana (Pontederiaceae), a new, threatened species from the Mexican Yucatan Peninsula
FIGURE 1. Distribution of the species of Heteranthera in the Mexican Yucatan peninsula: Heteranthera yucatana (blue squares), H. dubia (green squares), and H. limosa (red squares).
FIGURE 12 in A new species of Ilyobius Enderlein, 1910 (Megaloptera: Sialidae) from a threatened region in the Mantiqueira Mountain range (Brazil)
FIGURE 12. Ilyobius hauseri (Contreras-Ramos, Fiorentin & Urakami, 2005), genitalia of female paratype. (A) lateral; (B) morphological interpretation of genital sclerites in A; (C) ventral; (D) morphological interpretation of genital sclerites in C; (E) ventral, the arrow indicates the gonocoxite 8 underneath S7. Scale bars, A, C = 0.5 mm, E = 0.2 mm.
FIGURE 8 in A new species of Ilyobius Enderlein, 1910 (Megaloptera: Sialidae) from a threatened region in the Mantiqueira Mountain range (Brazil)
FIGURE 8. Ilyobius erebus sp. nov., mature larvae. (A) habitus, dorsal; (B) head, lateral; (C) head, dorsal; (D) head, ventral. Scale bars, A= 2 mm; B = 0.5 mm; C, D = 1 mm.
FIG. 3 in Patch Dynamics Inform Management Decisions in a Threatened Frog Species
FIG. 3. Movements of telemetered juvenile Crawfish Frogs after release near their natal wetland, Nate's Pond (Hillenbrand Fish and Wildlife AreaWest, Greene County, Indiana). Individuals tracked in 2011 (n ¼ 25) are separated into (A) and (B) to reduce confusion from crossing telemetered paths. We released all the juveniles at the same point (the centered yellow circle) and attempted to relocate individuals every morning during the daylight. We released telemetered juveniles in 2015 (n ¼ 12) at artificial burrows created between 5 and 330 meters from the drift fence (C). Each colored circle represents a relocation point for an individual. The largest circle for each colored path indicates the artificial burrow release site for that individual. Large circles without lines show frogs that did not disperse. Black arrows indicate Nate's Pond. Scale bar ¼ 100 m.
FIGURE 2. Manilkara dardanoi. A. Habit. B in Manilkara dardanoi (Sapotaceae): the rediscovery of an endemic and threatened species in northeastern Brazil
FIGURE 2. Manilkara dardanoi. A. Habit. B. Lower surface of leaf indumentum crisp. C. Representative stamens and staminodes. D. Ovary. E. Fruit. F. Seed. (B, D–F from Almeida Jr. & Lima 856, PEUFR; A, C–D from Andrade-Lima 52-980, PEUFR). Illustrator: Regina Carvalho.
FIGURE 5 in Three new species threatened by mining activity in New Caledonia
FIGURE 5. Drawing of Geijera tartarea. A—Fruiting branches; B—Abaxial (left) and adaxial (right) sides of the leaf with detail of oildots; C—Apical buds; D—Flowering twig; E—Flower bud; F—Flower seen in profile; G—Flower seen from the front; H—Adaxial (left) and abaxial (right) sides of a petal; I—Stamen; J—Gynoecium; K—Fruit; L—Seed.
Nature-based climate solutions can safeguard the world's threatened species
<p>This dataset consists of three output raster layers:</p> <ol> <li>Climate change mitigation potential across all areas that qualify for investible nature-based climate solutions (tCO<sub>2</sub>e ha<sup>-1</sup>yr<sup>-1</sup>);</li> <li>Climate change mitigation potential of areas of nature-based climate solutions that could be profitable (tCO<sub>2</sub>e ha<sup>-1</sup>yr<sup>-1</sup>);</li> <li>Net present value estimates of these profitable areas based on the baseline scenario ($ha<sup>-1</sup>yr<sup>-1</sup>).</li> </ol> <p>It also contains two output csv files (biodiversity benefits at country-level and species level), and one R-script that provides an example of our analyses. This dataset is designed to accompany Zeng et al. and the full methodology is described in that publication.</p> <p>Briefly, in this study we modelled the potential financial returns of nature-based climate solutions that focus on avoided habitat loss and restoration of terrestrial forests, grasslands, peatswamp forests and mangrove forests, across the globe. We then determined the potential for financially viable sites to safeguard the distributional ranges of 3,975 species of mammals, amphibians and birds which are currently threatened by range restriction or reduction. Last, we calculated the effect of increasing the price of carbon on the coverage of species ranges. Details of this methods can be in “Dataset overview”.</p> <p>For questions or issues on the spatial data layers, please contact Yiwen Zeng (yz0467@princeton.edu). </p>
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International Brain Laboratory public data
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OpenNeuro
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