1000 resultados para winter congregations


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Mode of access: Internet.

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"A Christmas and New Year's present."

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Mode of access: Internet.

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A detailed ecological, micro-structural and skeletal Sr/Ca study of a 3.42 m thick Goniopora reef profile from an emerged Holocene reef terrace at the northern South China Sea reveals at least nine abrupt massive Goniopora stress and mortality events occurred in winter during the 7.0-7.5 thousand calendar years before present (cal. ka BP) (within the Holocene climatic optimum). Whilst calculated Sr/Ca-SST (sea surface temperature) maxima during this period are comparable to those in the 1990s, Sr/Ca-SST minima are significantly lower, probably due to stronger winter monsoons. Such generally cooler winters, superimposed by further exceptional winter cooling on inter-annual to decadal scales, may have caused stress and mortality of the corals about every 50 years. Sea level rose by similar to 3.42 m during this period, with present sea-level reached at similar to 7.3 ka BP and a sea-level highstand of at least similar to 1.8 m occurred at similar to 7.0 ka. The results show that it took about 20-25 years for a killed Goniopora coral reef to recover. (C) 2004 Elsevier B.V. All rights reserved.

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This article focuses on the involvement and management of spontaneous volunteers (SVs). It develops a new theory—which we call the “involvement/exclusion” paradox—about a situation which is frequently manifested when SVs converge in times of disaster. After reviewing research and policy guidance relating to spontaneous volunteering, we present findings from a study of responses to winter flood episodes in England. Taking together the empirical findings and the literature, the article analyzes elements inherent in the involvement/exclusion paradox and develops a conceptual model to illustrate and explain the paradox. Implications for managers and future research are discussed.

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In our study the application of mint species (spearmint, peppermint ‘Mitcham’ and peppermint ‘Mexian’) and cinnamon was investigated against Fusarium head blight of winter wheat in vitro and in vivo. The effect of crude drugs and the aqueous extract of mint, and the effect of essential oils of mint and cinnamon on mycelial growth were evaluated in lab. On artificial media the crude drug showed higher inhibition than aqueous plant extracts. Cinnamon and spearmint oils e.ectively inhibited mycelia growth. In field trial artificially inoculated winter wheat was treated with the in vitro effective oils under small-plot conditions. The disease incidence was most inhibited by cinnamon oil, applied curative. According to our results the essential oil of cinnamon can be an appropriate candidate for the research of alternative disease control.