نتایج جستجو برای: clumped
تعداد نتایج: 1053 فیلتر نتایج به سال:
Abstract Carbonate clumped isotope thermometry has been applied to fossil mollusk shells from Tibet reconstruct the paleoclimate and paleoelevation of region. However, inferred climatic conditions this proxy are inconsistent with paleontological evidence. Here, we report new data both modern (5–4 Ma) freshwater results X-ray diffraction (XRD) analyses Himalayan-Tibetan Plateau. Although all ana...
The red list of the International Union for Conservation Nature and Natural Resources (IUCN) reported Castanopsis argentea as an endangered species. Studies about autecology on its natural habitat become important to perform species conservation. This study aimed analyze population structure, distribution pattern, environmental factors that influence presence C. in Telaga Warna Reserve. Data wa...
Turtles are killed on roads, yet there is little evidence of negative road effects their abundances. We hypothesized that this could be due to reduced predation turtle nests laid along roadsides, which compensate for the higher adult mortality populations near roads. To test this, we quantified relative differences in artificial painted (Chrysemys picta) and far from a field experiment controll...
During its late-stage evolution, the European Alpine orogen witnessed a northwest-directed propagation of deformation front along an evaporitic basal décollement into foreland. This resulted in decoupling northern Molasse Basin from basement and formation Jura fold-and-thrust belt. Here, we present first absolute age temperature constraints on this using carbonate U-Pb LA-ICP-MS dating clumped ...
I discuss observational evidence – independent of the direct spectral diagnostics of stellar winds themselves – suggesting that mass-loss rates for O stars need to be revised downward by roughly a factor of three or more, in line with recent observed mass-loss rates for clumped winds. These independent constraints include the large observed mass-loss rates in LBV eruptions, the large masses of ...
In 1999, American lobsters, Homarus americanus, from western Long Island Sound (WLIS) experienced a significant mortality. In 2001 and 2004, the eyes and eyestalks of lobsters from WLIS and central LIS were examined for histopathological changes. Idiopathic lesions were identified in the ommatidia and optic nerve fibers proximal to the ommatidia in 29 (56%) of the lobsters from LIS. Lesions wer...
NGC 1068 is one of the best studied Seyfert II galaxies, for which the blackhole mass has been determined from the Doppler velocities of water maser. We show that the standard α-disk model of NGC 1068 gives disk mass between the radii of 0.65 pc and 1.1 pc (the region from which water maser emission is detected) to be about 7x10 M⊙ (for α = 0.1), more than four times the blackhole mass, and a T...
1. Frequency of singletons - species represented by single individuals - is anomalously high in most large tropical arthropod surveys (average, 32%). 2. We sampled 5965 adult spiders of 352 species (29% singletons) from 1 ha of lowland tropical moist forest in Guyana. 3. Four common hypotheses (small body size, male-biased sex ratio, cryptic habits, clumped distributions) failed to explain sing...
Parasitoid-induced mortality of house fly, Musca domestica L., pupae and parasitoid progeny emergence by four species of pteromalid parasitoids, Muscidifurax raptor Girault & Sanders, M.zaraptor Kogan & Legner, Spalangia cameroni Perkins and S.endius Walker, were determined for a 24 h exposure period using parasitoid: host ratios ranging from 1:2 to 1:50. When the number of parasitoids was held...
In this study, I tested the effect of Syagrus loefgrenii nut number on the removal intensity by rodents across seasons. Also, I assessed both S. loefgrenii fruit production, and dispersion pattern to analyze the relationship between these parameters and nut removal. Trials were performed (autumn, winter, spring, and summer), in which endocarps were placed inside trays (5, 15, and 40 endocarps) ...
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