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Wyszukujesz frazę "penguin" wg kryterium: Temat


Tytuł:
Climate change influences on Antarctic bird populations
Autorzy:
Korczak-Abshire, M.
Tematy:
climate change
Antarctic
bird
penguin
Adelie penguin
Pygoscelis adeliae
gentoo penguin
Pygoscelis papua
chinstrap penguin
Pygoscelis antarctica
animal population
sea bird
temperature
wind
precipitation
warming
breeding area
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/12020.pdf  Link otwiera się w nowym oknie
Opis:
Rapid changes in the major environmental variables like: temperature, wind and precipitation have occurred in the Antarctic region during the last 50 years. In this very sensitive region, even small changes can potentially lead to major environmental perturbations. Then the climate change poses a new challenge to the survival of Antarctic wildlife. As important bioindicators of changes in the ecosystem seabirds and their response to the climate perturbations have been recorded. Atmospheric warming and consequent changes in sea ice conditions have been hypothesized to differentially affect predator populations due to different predator life-history strategies and substantially altered krill recruitment dynamics.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutrients and cations content in soil solutions from the present and abandoned penguin rookeries (Antarctica, King George Island)
Nutrients and cations content in soil solutions from penguin rookeries
Autorzy:
Rakusa-Suszczewski, Stanisław
Juchnowicz-Bierbasz, Marek
Współwytwórcy:
Polish Academy of Sciences. Institute of Ecology
Wydawca:
Polish Academy of Sciences. Institute of Ecology. Publishing Office
Powiązania:
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Opis:
Penguin rookeries are one of the main sources of nutrients for the poor ecosystems of Antarctica. At the current penguin rookeries, and in their vicinity, nitrogen rich ornithogenic soils are formed. Relict ornithogenic soils created at the abandoned rookeries hundreds or even thousands years ago are rich in phosphates. In the region of maritime Antarctica, water plays an important role in distribution and redistribution of nutrients (surface flows and percolation). Soil decomposition processes result in cations and nutrient release. In nutrients originating from relict ornithogenic soils of the Antarctic tundra, phosphates are the dominating elements; while in nutrients originating from contemporary ornithogenic soils nitrogen (mainly ammonia) is the main ingredient. Mineral soils free of penguin influence contain minute amounts of nutrients. Low pH of soil solutions (<4) causes increase of dissolving of phosphate complexes. Near penguin rookery, pH was lowest (2.73-3.33) and intermediate (2.92-3.77) in relict soils. The values of pH were the highest in soil solutions from mineral soil (5.43-7.33). High concentration of cations (mainly K) in soil solutions from the ornithogenic soils and relict ornithogenic soils, suggest their organic (animal) origin.
Bibliographical references (pages 89-91)
Pages 79-91 : illustrations ; 27 cm
Strony 79-91 : ilustracje ; 27 cm
Bibliografia na stronach 89-91
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka

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