999 resultados para JD
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von Scholem Alechem. Aus dem Jüd. bearb. von Samuel Meisels
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von Jizchok Leib Perez. Aus dem Jüd. v. Siegried Schmitz
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me- ... Yehudah Aryeh mi-Modena ...
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aus d. Jüd.-Dt. übers., mit Erl. versehen u. hrsg. von Alfred Feilchenfeld
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aus d. Jüd.-Dt. übers., mit Erl. versehen u. hrsg. von Alfred Feilchenfeld
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von Moritz Bileski
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Mathias Acher
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von B. Lewin
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von Richard Lichtheim
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von Felix Kanter
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ausgew. u. in jüd.-dt. Reime gebracht von Moses Wallich aus Worms. Mit e. Vorw. von Aron Freimann
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[B. Jacobsohn]
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To determine the role lemmings play in structuring plant communities and their contribution to the 'greening of the Arctic', we measured plant cover and biomass in 50 + year old lemming exclosures and control plots in the coastal tundra near Barrow, Alaska. The response of plant functional types to herbivore exclusion varied among land cover types. In general, the abundance of lichens and bryophytes increased with the exclusion of lemmings, whereas graminoids decreased, although the magnitude of these responses varied among land cover types. These results suggest that sustained lemming activity promotes a higher biomass of vascular plant functional types than would be expected without their presence and highlights the importance of considering herbivory when interpreting patterns of greening in the Arctic. In light of the rapid environmental change ongoing in the Arctic and the potential regional to global implications of this change, further exploration regarding the long-term influence of arvicoline rodents on ecosystem function (e.g. carbon and energy balance) should be considered a research priority.