Reflexiones desde la eco-antropología sobre el terroir

El Terroir constituye en la actualidad un concepto clave en el pensamiento sobre la producción de alimentos y de bebidas de calidad. En este texto, consideramos esta noción con un punto de vista eco-antropológico apoyándonos sobre ejemplos sacados principalmente de la historia y de la actualidad de ciertos vinos. Estudiamos sucesivamente su construcción, sus usos (en particular en el marco de los procesos de denominación de origen) y sus representaciones.

Intraspecific facilitation by allelochemical mediated grazing protection within a toxigenic dinoflagellate population, link to supplementary material

Dinoflagellates are a major cause of harmful algal blooms, with consequences for coastal marine ecosystem functioning and services. Alexandrium tamarense is one of the most abundant and widespread toxigenic species in the temperate northern and southern hemisphere, and produces paralytic shellfish poisoning toxins as well as lytic allelochemical substances. These bioactive compounds may support the success of A. tamarense and its ability to form blooms. Here we investigate the impact of grazing on monoclonal and mixed set-ups of highly (Alex2) and moderately (Alex4) allelochemically active A. tamarense strains and on a non-allelochemically active conspecific (Alex5) by the heterotrophic dinoflagellate Polykrikos kofoidii. While Alex4 and particularly Alex5 were strongly grazed by P. kofoidii when offered alone, both strains grew well in the mixed assemblages (Alex4+Alex5 and Alex2+Alex5). Hence, the allelochemical active strains facilitated growth of the non-active strain by protecting the population as a whole against grazing. Based on our results, we argue that facilitation among clonal lineages within a species may partly explain the high genotypic and phenotypic diversity of Alexandrium populations. Populations of Alexandrium may comprise multiple cooperative traits that act in concert with intraspecific facilitation, and hence promote the success of this notorious harmful algal bloom species.

Abundance, biomass, production, grazing, and biometric measurements of prokaryotes, nanoflagellates, ciliates, and dinoflagellates in three areas close to the Antarctic Peninsula in spring and summer 1995/96

Two cruises were carried out during the Austral spring-summer (November 1995 - January 1996: FRUELA 95, and January - February 1996: FRUELA 96), sampling in Bellingshausen Sea, western Bransfield Strait and Gerlache Strait. We investigated whether there were any spatial (among locations) or temporal (between cruises) differences in abundance and biomass of microbial heterotrophic and autotrophic assemblages. Changes in the concentration of chlorophyll a, prokaryotes, heterotrophic and phototrophic nanoflagellates abundance and biomass were followed in the above mentioned locations close to the Antarctic Peninsula. Parallel to these measurements we selected seven stations to determine grazing rates on prokaryotes by protists at a depth coincident with the depth of maximum chlorophyll a concentration. Measuring the disappearance of fluorescent minicells over 48 h assessed grazing by the protist community. From prokaryotes grazing rates, we estimated how much prokaryotic carbon was channeled to higher trophic levels (protists), and whether this prokaryotic carbon could maintain protists biomass and growth rates. In general higher values were reported for Gerlache Strait than for the other two areas. Differences between cruises were more evident for the oligotrophic areas in Bellingshausen Sea and Bransfield Strait than in Gerlache Strait (eutrophic area). Higher values for phototrophic (at least for chlorophyll a concentration) and abundance of all heterotrophic microbial populations were recorded in Bellingshausen Sea and Bransfield Strait during late spring - early summer (FRUELA 95) than in mid-summer (FRUELA 96). However, similar results for these variables were observed in Gerlache Strait as in spring-early summer as well as in mid-summer. Also, we found differences in grazing rates on prokaryotes among stations located in the three areas and between cruises. Thus, during late spring-early summer (FRUELA 95), the prokaryotic biomass consumed from the standing stock was higher in Bellingshausen Sea (26%/day) and Gerlache Strait (18-26%/day) than in Bransfield Strait (0.68-14%/day). During mid-summer (FRUELA 96) a different pattern was observed. The station located in Bellingshausen Sea showed higher values of prokaryotic biomass consumed (11%/day) than the one located in Gerlache Strait (2.3%/day). Assuming HNF as the main prokaryotic consumers, we estimated that the prokaryotic carbon consumed by heterotrophic nanoflagellates (HNF) barely covers their carbon requirements for growth. These results suggest that in Antarctic waters, HNF should feed in other carbon sources than prokaryotes.

El asedio : Eco del mundo novelesco de Arturo Pérez Reverte

El asedio (2010), de Arturo Pérez Reverte, ofrece una multiplicidad de entradas posibles, ya que se trata de una voluminosa novela coral, que concentra la experiencia de su autor. Proponemos, para este encuentro, un enfoque centrado en analizar los universos de los personajes y su trabazón caleidoscópica. Pérez Reverte utiliza siempre una tercera persona que se cuela en las zonas oscuras y recónditas de tipos humanos inmersos en una ciudad y un tiempo hostiles: Cádiz en 1811. Despliega las condiciones de asedio militar a ese territorio, que se replican de variados modos en individuos asediados por sus propios conflictos. La naturalidad con la que los personajes se encuentran en puntos de unión y de fuga conforma una telaraña, cuyos hilos representan la trabazón de esta novela de novelas

El asedio : Eco del mundo novelesco de Arturo Pérez Reverte

El asedio (2010), de Arturo Pérez Reverte, ofrece una multiplicidad de entradas posibles, ya que se trata de una voluminosa novela coral, que concentra la experiencia de su autor. Proponemos, para este encuentro, un enfoque centrado en analizar los universos de los personajes y su trabazón caleidoscópica. Pérez Reverte utiliza siempre una tercera persona que se cuela en las zonas oscuras y recónditas de tipos humanos inmersos en una ciudad y un tiempo hostiles: Cádiz en 1811. Despliega las condiciones de asedio militar a ese territorio, que se replican de variados modos en individuos asediados por sus propios conflictos. La naturalidad con la que los personajes se encuentran en puntos de unión y de fuga conforma una telaraña, cuyos hilos representan la trabazón de esta novela de novelas