Fe and Mn in Antarctic bivales: Indicators of change in near-shore biogeochemistry?

我们测试的假设，微量元素（铁，锰）在南极软壳蛤Laternula椭圆形的组织和壳基质中的浓度反映了融水驱动的环境中的微量元素负荷。组织应该反映了急性浓度，而外壳档案的冰川发展和融化的空间和时间的信号。双壳贝类对微量元素的吸收、掺入和释放。椭圆形的将在实验中进行研究，通过暴露双壳类的微粒和溶解的铁（Fe）。铁吸收到不同的组织和纳入壳的途径进行了分析。此外，将从乔治王岛冰川融化速度快和慢的地点收集动物，并将铁和锰纳入LA-ICP-MS测量的年度生长带。

We test the hypothesis that trace element (Fe, Mn) concentrations in both tissues and shell matrix of the Antarctic soft shell clam Laternula elliptica reflect melt water driven trace element load in the environment. The tissue should reflect the acute concentrations, whereas the shell archives signals of glacial development and melt-ing in space and over time. Trace element uptake, incorporation and release by the bivalve L. elliptica will be investigated in experiments, by exposing bivalves to par-ticulate and dissolved iron (Fe). Fe uptake into different tissues and the pathways of incorporation into shell will be analyzed. Further, animals will be collected from sites with fast and slow glacier melt rates at King-George Island and incorporation of Fe and Mn into yearly growth bands measured with LA-ICP-MS.