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首页> 外文期刊>Oceanologia >Deposition of large organic particles (macrodetritus) in a sandy beach system (Puck Bay, Baltic Sea)
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Deposition of large organic particles (macrodetritus) in a sandy beach system (Puck Bay, Baltic Sea)

机译：在沙滩系统（波克湾，波罗的海）中沉积的大型有机颗粒（大微生物）

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The aim of this study was to evaluate the amount of organic macrodetritus deposited on the sandy shores of the southern Baltic, and to determine the type of washout material and their chemical composition (carbon and nitrogen). Over 900 samples of macrodetritus (particles retained on a 0.5 mm sieve) were collected from seven sampling locations along a 120 km stretch of coastline in Poland at monthly intervals in 2002. Analysis of the C and N content of several categories of detritus supplied information about seasonal changes in and the ageing of algal debris, and indicated that the amount of carrion is constant; the latter is apparently always metabolised very rapidly. The annual deposition of macroalgal detritus on this coast was estimated at 15 000 tonnes fresh weight, that is around 75% of the primary production of filamentous macroalgae in Puck Bay. In comparison with the amounts of kelp deposited on sandy beaches in South Africa (Griffiths & Stenton-Dozey 1981), the massive seaweed washouts on Mediterranean beaches (Morand & Briand 1996), or the deposition of algal mats in the northern Baltic (Norkko & Bonsdorff 1996a), the quantities of macrodetritus on the shore in the study area are average, even allowing for the fact that the Baltic Sea is highly eutrophic (HELCOM 2005).
机译：这项研究的目的是评估沉积在波罗的海南部沙质海岸上的有机碎屑的数量，并确定冲刷物质的类型及其化学成分（碳和氮）。 2002年，每月间隔从波兰120公里海岸线上七个采样点采集900多个大碎屑样本（颗粒保留在0.5毫米筛网上）。对几种碎屑的C和N含量进行的分析提供了有关以下方面的信息：藻屑的季节性变化和衰老，表明腐肉的数量是恒定的;后者显然总是很快被代谢。据估计，该海岸每年的大型藻碎屑沉积量为15,000吨鲜重，约为帕克湾丝状大型藻类初级生产量的75％。与沉积在南非沙滩上的海带数量相比（Griffiths和Stenton-Dozey 1981），在地中海海滩上大量的海藻冲刷物（Morand＆Briand 1996）或在波罗的海北部的藻类沉积物（Norkko和Bonsdorff 1996a），研究区域内海岸的大型碎屑数量是平均的，甚至考虑到波罗的海是富营养化的事实（HELCOM 2005）。

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