Baseline metal concentrations in marine algae from São Miguel (Azores) under different ecological conditions - Urban proximity and shallow water hydrothermal activity
a Heriot-Watt University, School of Life Sciences, Riccarton, Edinburgh EH14 4AS, UK b CIRN and Departamento de Biologia, Universidade dos Açores, Rua da Mãe de Deus, Apartado 1422, 9501-801 Ponta Delgada, São Miguel - Açores, Portugal