Religiöse Scheidewände : ein Wink in d. Judenbewegung

von Leo Rauchmann [d.i. Jakob Stern]

Vergütung der Kriegsschäden und die Juden

von Jakob Aschkenasy

Factors controlling decomposition rates of fine root litter in temperate forests and grasslands

Background and aims Fine root decomposition contributes significantly to element cycling in terrestrial ecosystems. However, studies on root decomposition rates and on the factors that potentially influence them are fewer than those on leaf litter decomposition. To study the effects of region and land use intensity on fine root decomposition, we established a large scale study in three German regions with different climate regimes and soil properties. Methods In 150 forest and 150 grassland sites we deployed litterbags (100 μm mesh size) with standardized litter consisting of fine roots from European beech in forests and from a lowland mesophilous hay meadow in grasslands. In the central study region, we compared decomposition rates of this standardized litter with root litter collected on-site to separate the effect of litter quality from environmental factors. Results Standardized herbaceous roots in grassland soils decomposed on average significantly faster (24 ± 6 % mass loss after 12 months, mean ± SD) than beech roots in forest soils (12 ± 4 %; p < 0.001). Fine root decomposition varied among the three study regions. Land use intensity, in particular N addition, decreased fine root decomposition in grasslands. The initial lignin:N ratio explained 15 % of the variance in grasslands and 11 % in forests. Soil moisture, soil temperature, and C:N ratios of soils together explained 34 % of the variance of the fine root mass loss in grasslands, and 24 % in forests. Conclusions Grasslands, which have higher fine root biomass and root turnover compared to forests, also have higher rates of root decomposition. Our results further show that at the regional scale fine root decomposition is influenced by environmental variables such as soil moisture, soil temperature and soil nutrient content. Additional variation is explained by root litter quality.

Das deutsche Judentum und seine jüdischen Gegner

von Jakob Marx

Erzählungen der Heiligen Schrift für Israeliten : zum Schul- und Privatgebrauch

bearb. von Abrah. Jakob Cohn u. Abraham Dinkelspiel

Plan der höheren Bürgerschule für israelitische Knaben

von B. Placzek

Pädagogisch-psychologische Grundfragen zur Methodik des jüdischen Religionsunterrichts

Stoll, Jakob

Briefe eines Neulings an den Verfasser der politischen Gespräche aus dem Reiche der Todten : nebst beigedr. 3 Aufsätzen aus d. Gesprächen im Reiche d. Todten, wodurch diese Briefe veranlaßt sind

[Jakob Stern]

Das Wesen des Judentums

von J. Fromer (Elias Jakob)

Israel's National-Charakter in seiner Licht- und Schattenseite betrachtet : eine Homilie, vorgetr. am Sabbat Woero 5622 im Jan. 1861

von Jakob Grünwald

Krisis und Entscheidung im Judentum : der Probleme des modernen Judentums

von Jakob Klatzkin