Department of Molecular Pathobiology, New York University College of Dentistry, 345 East 24th Street, New York, NY 10010, USA.
Environmental Genomics Lab, Biology Program, Division of Science and Mathematics, New York University Abu Dhabi, Saadiyat Island, PO Box 129188, Abu Dhabi 51133, UAE.
Molecules. 2020 Oct 22;25(21):4871. doi: 10.3390/molecules25214871.
The elemental composition of freshwater and saltwater samples around the South Pacific island of Upolu, Samoa has been investigated together with other indicators of water quality. Up to 69 elements from Li (3) to U (92) are measured in each sample, analyzed by Mattauch-Herzog-inductively coupled plasma-mass spectrometry (MH-ICP-MS). One hundred and seventy-six samples were collected from surface freshwater sources (24 rivers, two volcanic lakes, one dam) and from seawater sources from the surface to 30 m depth (45 inner reef, reef, and outer reef locations) around Upolu Island, including river mouths and estuaries. Principal component and hierarchical clustering correlation analyses were performed on quantile normalized log transformed elemental composition data to identify groups of samples with similar characteristics and to improve the visualization of the full spectrum of elements. Human activities, such as the use of herbicides and pesticides, may relate to observed elevated concentrations of some elements contained in chemicals known to have deleterious obesogenic effects on humans that may also cause coral reef decline. Furthermore, the salinity of some saltwater samples tested were very high, possibly due to climate variability, which may additionally harm the health and biodiversity of coral reefs.
对南太平洋乌波卢岛（Upolu）周围的淡水和海水样本的元素组成以及其他水质指标进行了研究。每个样本都通过马塔丘-赫佐格电感耦合等离子体质谱法（Mattauch-Herzog-inductively coupled plasma-mass spectrometry，MH-ICP-MS）测量了从 Li（3）到 U（92）的 69 种元素。从乌波卢岛周围的地表水来源（24 条河流、两个火山湖、一个大坝）和从表面到 30 米深度的海水来源（45 个内礁、礁和外礁位置）采集了 176 个样本，包括河口和港湾。对定标标准化对数变换元素组成数据进行主成分和层次聚类相关分析，以识别具有相似特征的样本组，并改善对全元素谱的可视化。人类活动，如除草剂和杀虫剂的使用，可能与一些化学物质中所含的某些元素的浓度升高有关，这些化学物质已知对人体具有有害的肥胖作用，也可能导致珊瑚礁退化。此外，一些测试盐水样本的盐度非常高，可能是由于气候变化，这可能进一步损害珊瑚礁的健康和生物多样性。
