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首页> 外文期刊>Limnology >Vertical distributions of stable isotopic compositions and bacteriochlorophyll homologues in suspended particulate matter in saline meromictic Lake Abashiri
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Vertical distributions of stable isotopic compositions and bacteriochlorophyll homologues in suspended particulate matter in saline meromictic Lake Abashiri

机译：盐溶的淡水湖网走湖悬浮颗粒物中稳定同位素组成和细菌叶绿素同系物的垂直分布

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摘要

We determined chloropigment composition as well as stable carbon and nitrogen isotopic compositions of dissolved and particulate species in saline meromictic Lake Abashiri. We observed a sharp peak of bacteriochlorophyll e in a narrow redox boundary zone and the upper monimolimnion, indicating a dense population of brown-colored strains of green sulfur bacteria around the chemocline. Nitrogen isotopic records of particulate nitrogen and dissolved ammonium suggested that the green sulfur bacteria in the redox boundary zone assimilated either ammonium or dinitrogen through the nitrogen fixation pathway. In the anoxic monimolimnion, several lines of evidence suggest that a major portion of particulate organic matter originated from the overlying mixolimnion and redox boundary zone.
机译：我们确定了盐溶的淡色湖泊网走湖中的氯色素组成以及溶解和颗粒状物种的稳定碳和氮同位素组成。我们在狭窄的氧化还原边界区和上部莫利莫林观察到了细菌叶绿素e的尖峰，表明在趋化环周围有密集的棕色绿硫细菌菌株。颗粒物氮和溶解态铵的氮同位素记录表明，氧化还原边界区中的绿色硫细菌通过固氮途径吸收了铵或二氮。在缺氧的单imolimnion中，有几条证据表明大部分的颗粒有机物都来自上覆的混合低聚物和氧化还原边界带。

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