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    Wyświetlanie 1-3 z 3
    Tytuł:
    Early Miocene evolution of the rodent Megacricetodon in Europe and its palaeobiogeographical implications
    Autorzy:
    Oliver, A.
    Pelaez-Campomanes, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/22836.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Miocene
    evolution
    rodent
    Mammalia
    Rodentia
    Cricetodontidae
    migration
    endemism
    Megacricetodon
    paleobiogeography
    Early Miocene
    Europe
    Opis:
    The Megacricetodon material from Aliveri (Isle of Evia, Greece) was previously assigned to Megacricetodon primitivus, implying palaeobiogeographical relationship between south-eastern and south-western Europe. The material from Aliveri is here assigned to the new species Megacricetodon hellenicus sp. nov. This form has significant morphological differences compared to other Early Miocene species from Europe. This new evolutionary hypothesis of this genus has implications on the Early Miocene paleobiogeography of Europe. This work presents a new interpretation on the earliest European representative of the genus Megacricetodon from Aliveri localities. Analyses of the Megacricetodon material from MN 4 and MN 5 localities enable to propose a new palaeobiogeographical framework in which there are three main migration events of the genus Megacricetodon into Europe, each corresponding to different lineages that evolved independently. The new Greek taxon is considered the first migration wave from Anatolia, representing an endemic lineage different from any other European Megacricetodon.
    Źródło:
    Acta Palaeontologica Polonica; 2016, 61, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Squamous cell carcinoma of the eyelid in a cat
    Rak płaskonabłonkowy powieki u kota
    Autorzy:
    Oliver, J.A.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/9944.pdf
    Data publikacji:
    2013
    Wydawca:
    Okulistyka Weterynaryjna
    Źródło:
    Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii; 2013, 3
    2082-9256
    Pojawia się w:
    Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal variation in species composition, diversity and regeneration status along altitudinal gradient and slope: The case of Chilimo dry Afromontane forest in the Central Highlands of Ethiopia
    Autorzy:
    Tesfaye, Mehari A.
    Gardi, Oliver
    Blaser, Jűrgen
    Powiązania:
    https://bibliotekanauki.pl/articles/1046543.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Abundance
    Ethiopia
    altitude gradient
    native species
    population structure
    saplings
    seedlings and shrubs
    Opis:
    This study is aimed towards investigating the temporal variation in species composition, diversity and regeneration status of Chilimo dry Afromontane forest in the Central Highlands of Ethiopia. A total of 35 permanent sample plots of 20 m × 20 m (400 m2) each were established in the natural forest, laid out on transects of altitudinal gradients, with a distance of 100m between plots. The plots were measured twice in 2012 and 2017. Three subplots, 5m × 5m, and 1 m2 were laid out inside the main plots for sapling, shrub and seedling data collection. Species composition, diversity, important value index (IVI) and regeneration data were analyzed using appropriate formulas. Data analysis was made using R - studio software. A total of 31 trees and shrubs representing 25 families were recorded, 20 (64.52 %) were trees and 11 (35.48 %) were shrubs. Thereof, 28, 23 and 26 species under highest, middle and lowest altitudinal gradient were recorded. The most dominant tree species were: Juniperus procera, Podocarpus falcatus, Olea europea, Scolopia theifolia and Allophyllus abyssinicus. The species composition, diversity, abundance, dominance and important value index significantly varied among species, altitudinal gradient and slope. The diameter distribution was an inverted J - shaped distribution pattern. The highest species richness and diversity index were found under middle altitudinal gradient, while the lowest species richness and diversity index were found under the highest altitudinal gradient. The mean annual volume increment ranged from 4.223 to 0.228 m3 ha-1 yr-1, while the basal area increment varied from 0.85 to 0.020 m2 ha-1 yr-1. Among the sampled species, ten species had fair, 5 poor and 14 species had no regeneration. In conclusion, the Chilimo dry Afromontane forest is suffering from low recruitment and regeneration. Thus, appropriate forest management options should be implemented.
    Źródło:
    World Scientific News; 2019, 138, 2; 192-224
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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