Texture and composition of the Rosa Marina beach sands (Adriatic coast, southern Italy): a sedimentological/ecological approach

Beach sands from the Rosa Marina locality (Adriatic coast, southern Italy) were analysed mainly microscopically in order to trace the source areas of their lithoclastic and bioclastic components. The main cropping out sedimentary units were also studied with the objective to identify the potential source areas of lithoclasts. This allowed to establish how the various rock units contribute to the formation of beach sands. The analysis of the bioclastic components allows to estimate the actual role of organisms regarding the supply of this material to the beach. Identification of taxa that are present in the beach sands as shell fragments or other remains was carried out at the genus or family level. Ecologi- cal investigation of the same beach and the recognition of sub-environments (mainly distinguished on the basis of the nature of the substrate and of the water depth) was the key topic that allowed to establish the actual source areas of bioclasts in the Rosa Marina beach sands. The sedimentological analysis (including a physical study of the beach and the calculation of some statistical parameters concerning the grain-size curves) shows that the Rosa Marina beach is nowadays subject to erosion.

El límite sur de distribución de Zostera marina L. y Phyllospadix torreyi Watson para el noroeste mexicano

Se analiza el límite sur de distribución de dos angiospermas marinas en México.

Macroalgas epífitas de Zostera marina L. en Bahía Concepción, B.C.S., México

Macroalgas epífitas de Zostera marina L. en Bahía Concepción, B. C. S. México.

Marina Castro, Dioselina Orozco, Alicia Reyes, Virgelina Alvarez, Nery López, Josefina Restrepo y Eli de Vargas, en una congregación popular en la Plaza Principal

Marina Castro, Dioselina Orozco, Alicia Reyes, Virgelina Alvarez, Nery López, Josefina Restrepo y Eli de Vargas, en una congregación popular en la Plaza Principal. Versalles, 1950.

Lecture by Marina Abramovic, given at Florida International University, March 30, 2007

Marina Abramovic she discusses what it means to be a performance artist drawing from stories from her life, including stories from her childhood. Introduction by Dahlia Morgan.

White-faced storm-petrels Pelagodroma marina predated by gulls as biological monitors of plastic pollution in the pelagic subtropical northeast atlantic

Marine plastic pollution is rapidly growing and is a source of major concern. Seabirds often ingest plastic debris and are increasingly used as biological monitors of plastic pollution. However, virtually no studies have assessed plastics in seabirds in the deep subtropical North Atlantic. We investigated whether remains of white-faced storm-petrels (WFSP) present in gull pellets could be used for biomonitoring. We analysed 263 pellets and 79.0% of these contained plastic debris originating in the digestive tract of WFSP. Pellets with no bird prey did not contain plastics. Most debris were fragments (83.6%) with fewer plastic pellets (8.2%). Light-coloured plastics predominated (71.0%) and the most frequent polymer was HDPE (73.0%). Stable isotopes in toe-nails of WFSP containing many versus no plastics did not differ, indicating no individual specialisation leading to differential plastic ingestion. We suggest WFSP in pellets are highly suitable to monitor the little known pelagic subtropical Northeast Atlantic.

Inicios de la Marina Mercante de Chile: 1800-1870

Introducción El tema que he escogido para mi disertación en este Simposio sobre “Historia Marítima del Pacífico”, al que hemos sido convocados por el Centro de Investigaciones Historicas de America Central de la Universidad de Costa Rica y que se realiza el San José entre los días 13 y 15 de febrero del año 2001, tiene relación con algunas figuras de empresarios chilenos que constituyen en autenticos precursores de la actividad naviera privada y del comercion chileno de ultramar, como son los señores Jose Francisco de Urrutia Mendiburu y su sueño frustrado de abrir ruta del intercambio mercantil con las islas filipinas en el siglo XVII; Manuel Maria de Undurraga y Yavar, precursor de la idea de establecer una zona marítima costera de explotación exclusiva para Chile; Nicolas de la Curz y Bahamonde, exitoso comerciante chileno establecido en Cadis, caballero ilustrado y primer Conde de Maule…