Departamento de Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de Santiago de Compostela, Galicia, Spain.
Departamento de Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de Santiago de Compostela, Galicia, Spain.
Mar Pollut Bull. 2018 Aug;133:144-149. doi: 10.1016/j.marpolbul.2018.05.027. Epub 2018 May 19.
Seabird colonies drastically transform the sites that they inhabit. Although the influence of seabirds on nutrient cycling has been investigated in numerous studies, the effects on trace elements has scarcely been considered. In this study, we determined the total contents of 9 trace elements in biomaterials (excrement, pellets, feathers and eggs) and soils in relation to the presence the Yellow-legged gull Larus michahellis. The concentrations of Zn, Cu and As were particularly high in the pellets and excrement. The total contents of the trace elements were significantly higher in the soils in the sub-colonies in which Yellow-legged gulls predominate than in soil from the control zone (with no gulls). The difference was even higher for the most reactive geochemical fractions. We observed that the oxidizable fraction was the most relevant fraction for almost all trace elements, indicating the importance of organic matter in trace element retention in sandy soils.
海鸟群体会极大地改变它们栖息的地点。虽然已经有许多研究调查了海鸟对营养循环的影响，但对微量元素的影响几乎没有被考虑到。在这项研究中，我们确定了生物材料（粪便、丸粒、羽毛和蛋）和土壤中 9 种微量元素的总含量，以及黄腿海鸥（Larus michahellis）的存在情况。丸粒和粪便中的锌、铜和砷浓度特别高。在以黄腿海鸥为主的亚群中的土壤中，微量元素的总含量明显高于没有海鸥的对照区（控制区）的土壤。最活跃的地球化学分数的差异甚至更高。我们观察到，可氧化分数是几乎所有微量元素中最相关的分数，这表明在沙质土壤中，有机质对微量元素的保持很重要。
