Mercury concentrations in northern pike ( Esox lucius) from boreal lakes with logged, burned, or undisturbed catchments
Mercury concentrations in northern pike ( Esox lucius) from boreal lakes with logged, burned, or undisturbed catchments
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来自流域被砍伐、烧毁或未受干扰的北方湖泊的白斑狗鱼 (Esox lucius) 中的汞浓度
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
R. Carignan
中科院分区：
文献类型：
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作者：
Edenise Garcia;R. Carignan
我们测量了19个北方盾牌湖泊的总汞和稳定同位素(δ13C和δ15N)，这些湖泊来自北方19个未受干扰、伐木或烧毁的流域。在干重基础上，标准560毫米北部干重湖泊的平均汞含量(3.4微克·克-1)显著高于参照湖(1.9微克·克-1)。火烧湖的平均汞浓度(3.0µg·g-1)与测井湖和参照湖的汞浓度没有显著差异。根据同位素组成确定的归一化到营养位置的汞浓度也产生了类似的结果。在所有被记录的湖泊中，汞水平都高于世卫组织的安全消费限额。北部梭鱼汞与浮游动物甲基汞(+)、总氮(+)、pH(-)、碱度(-)、硫酸盐(+)、溶解有机碳负荷量(+)、湖水光衰减(+)相关。逐步多元回归解释了鱼类汞的79%的变异性，并包括浮游动物中的甲基汞、pH和硫酸盐作为独立变量。实验..。
We measured total Hg and stable isotopes (δ13C and δ15N) in northern pike (Esox lucius) from 19 Boreal Shield lakes with undisturbed, logged, or burned watersheds. Average Hg level in standard 560-mm northern pike, on a dry weight basis, was significantly higher in logged lakes (3.4 µg·g-1) than in reference lakes (1.9 µg·g-1). Average Hg concentrations in burned lakes (3.0 µg·g -1) did not differ significantly from those in logged and references lakes. Concentrations of Hg normalized to trophic position determined from isotopic composition yielded similar results. Mercury levels were above the WHO safe consumption limit in all logged lakes. Mercury in northern pike was correlated with methyl mercury in zooplankton (+), total N (+), pH (-), alkalinity (-), sulfate (+), dissolved organic C loading (+), and light attenuation in lake water (+). Stepwise multiple regressions explained 79% of the variability in Hg in fish and included methyl mercury in zooplankton, pH, and sulfate as independent variables. Exp...