Spatial and interspecific differences of trace element concentrations in the feathers of pelagic and coastal seabirds from the Northeast Atlantic Ocean and the Western Mediterranean Sea

Maria I. Laranjeiro; Joan Navarro; Albert Bertolero; Lara R. Cerveira; Eduarda Pereira; Ivo dos Santos; Jaime A. Ramos; João P. Coelho; Jorge M. Pereira; José Seco; Marco F.L. Lemos; Tomas Montalvo; Vítor H. Paiva; Sara C. Novais; Filipe R. Ceia