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64 results for “extirpation”
Figure 2. A in Spatial and temporal distributions of juvenile horseshoe crabs (Arthropoda: Chelicerata) approaching extirpation along the northwestern shoreline of the New Territories of Hong Kong SAR, China
Figure 2. A pictorial illustration of the sampling strategy adopted for the survey of juvenile horseshoe crabs at the eight stations. Sampling areas are indicated by grey rectangles.
Figure 1 in Spatial and temporal distributions of juvenile horseshoe crabs (Arthropoda: Chelicerata) approaching extirpation along the northwestern shoreline of the New Territories of Hong Kong SAR, China
Figure 1. (A) A map of Hong Kong showing the location of the study site in Deep Bay in the northwestern quadrant of the New Territories of Hong Kong. Also shown is the location of the cross-border bridge connecting Hong Kongat Pak Nai with mainland China at Shekou. (B) A more detailed map of the northwestern quadrant of Hong Kong showing the location of the eight sampling stations (A-H) in Deep Bay. Black areas denote mangrove stands, white ones oyster beds. Dotted lines represent streams in the study area.
Figure 4 in Spatial and temporal distributions of juvenile horseshoe crabs (Arthropoda: Chelicerata) approaching extirpation along the northwestern shoreline of the New Territories of Hong Kong SAR, China
Figure 4. The size frequency distribution, in terms of prosomal width, of juvenile Tachypleus tridentatus individuals obtained from Stations E, F and H, with means and standard deviations.
Figure 3 in Spatial and temporal distributions of juvenile horseshoe crabs (Arthropoda: Chelicerata) approaching extirpation along the northwestern shoreline of the New Territories of Hong Kong SAR, China
Figure 3. The spatial distribution in terms of mean abundance of juvenile Tachypleus tridentatus at Stations E, F and H with mean abundances ± standard deviations at the three stations also shown.
Fig. 2. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Area 5 in Population Trends of the Northeastern Beach Tiger Beetle,Cicindela dorsalis dorsalisSay (Coleoptera: Carabidae: Cicindelinae) in Virginia and Maryland, 1980s Through 2014
Fig. 2. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Area 5 (Calvert County, Maryland), Geographic Recovery Area 6 (Tangier Sound, Maryland), and Geographic Recovery Area 7 (Eastern Shore of Chesapeake Bay, Virginia) as of July 2014.
Fig. 1. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Areas 5–9 in Population Trends of the Northeastern Beach Tiger Beetle,Cicindela dorsalis dorsalisSay (Coleoptera: Carabidae: Cicindelinae) in Virginia and Maryland, 1980s Through 2014
Fig. 1. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Areas 5–9, Maryland and Virginia as of July 2014.
Fig. 3. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Area 8 in Population Trends of the Northeastern Beach Tiger Beetle,Cicindela dorsalis dorsalisSay (Coleoptera: Carabidae: Cicindelinae) in Virginia and Maryland, 1980s Through 2014
Fig. 3. Occupied and extirpated sites for Cicindela dorsalis dorsalis within Geographic Recovery Area 8 (Western Shore of Chesapeake Bay, north of Rappahannock River, Virginia) and Geographic Recovery Area 9 (Western Shore of Chesapeake Bay, south of Rappahannock River) as of July 2014.
Pre-Younger Dryas megafaunal extirpation at Rancho La Brea linked to fire-driven state shift
<p>The cause, or causes, of the Pleistocene megafaunal extinctions have been difficult to establish, in part because poor spatiotemporal resolution in the fossil record prevents alignment of species disappearances with archeological and environmental datasets. We obtained 172 new radiocarbon dates on megafauna from Rancho La Brea, USA, spanning 15.6 to 10 thousand calendar years before present (ka). Seven species of extinct megafauna disappeared by 13 ka, before the onset of the Younger Dryas. Comparison with high-resolution regional datasets reveals these disappearances coincided with an ecological state shift that followed aridification and vegetation changes during the Bølling-Allerød. Time series modeling implicates large-scale fires caused by humans as the primary cause of the extirpations; the catalyst of this state shift appears to have been mounting human impacts in a drying, warming, and increasingly fire-prone ecosystem.</p>
Data from: Human-mediated extirpation of the unique Chatham Islands sea lion and implications for the conservation management of remaining New Zealand sea lion populations
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Data from: Climate interacts with anthropogenic drivers to determine extirpation dynamics
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Data from: Shifting baselines on a tropical forest frontier: extirpations drive declines in local ecological knowledge
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Data from: Fearlessness towards extirpated large carnivores may exacerbate the impacts of naïve mesocarnivores
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Pre-Younger Dryas megafaunal extirpation at Rancho La Brea linked to fire-driven state shift
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Data from: Reintroducing extirpated herbivores could partially reverse the late Quaternary decline of large and grazing species
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Data from: Shrub encroachment is linked to extirpation of an apex predator
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Stepping into the past to conserve the future: archived skin swabs from extant and extirpated populations inform genetic management of an endangered amphibian
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Data from: Origination, extinction, invasion, and extirpation components of the brachiopod latitudinal biodiversity gradient through the Phanerozoic Eon
The geographic distribution of brachiopod genus occurrences over the Phanerozoic shows that secular declines in origination and extinction rates were paralleled by increases in invasion and extirpation rates. Origination and extinction rates declined in two phases, the first from the Cambrian to latest Permian Periods and the second from the latest Permian Period to the present, which were accompanied by concomitant increases in invasion and extirpation rates. In addition to the temporal correlation, an inverse correlation was also weakly evident among time-averaged latitudinal gradients of rates. Compared with faunas at higher latitudes, low-latitude faunas experienced higher origination and extinction rates, and lower invasion and extirpation rates. We suggest that progressive increases in migration ability lowered origination and extinction rates because species that were better equipped to track a preferred habitat, for example, by the ability to disperse larvae over large distances, were less likely to evolve or become extinct in response to local environmental changes. The two phases were separated by the end-Permian mass extinction, which reset to high levels the origination and extinction rates of a taxonomically and ecologically altered global brachiopod fauna. Our data also allow us to quantify the relative contributions of origination, extinction, invasion, and extirpation to regional diversity (quantified as 10° latitudinal zones) more generally. Overall, invasion and extirpation explained slightly more variation in diversity than in situ origination and extinction. The four variables usually occurred in combinations that maintained rather than altered the shape of the latitudinal diversity gradient. For most of the Phanerozoic Eon, the gradient was not the product of continuous renewal, but rather existed as a holdover from a previous interval.
Endoscopic Extirpation of Benign Breast Tumors Using a Lateral Chest Wall Incision
ClinicalTrials.gov study NCT06472700. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Virtual Reality Used During Tooth Extraction and Extirpation Treatment
ClinicalTrials.gov study NCT06315816. IPD Sharing: YES. Countries: 1. Publications: 0.
Mapping of Tumor Stem Cells in the Resection Marigin During Extirpation of Highly Malignant Gliomas Using GlioStem
ClinicalTrials.gov study NCT05556486. IPD Sharing: NO. Countries: 1. Publications: 0.
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