EULA

... CAROLINA MOYA 1,* , CLAUDIO VALDOVINOS 1, 2 , ANDRÉS MORAGA 1 , FRANCISCO ROMERO 3 , PATRICK ... en este tipo de ríos (Díaz-Villanueva & Modenutti 2004, Díaz-Villanueva & ... eg sedimentación y erosión) está controlada primero, por grandes lagos de origen ...

... Alejandra Oyanedel, Claudio Valdovinos, Natalia Sandoval, Carolina Moya, Gloria Kiessling, Jacqueline Salvo, and Viviana Olmos. ... between the watersheds of the rivers Cochamó (41°29′S, 72°15′W) and Madre de Dios (50°00′S, 75°18′W). Morrone and Lopretto (1994 ...

... Alejandra Oyanedel 1 , Claudio Valdovinos 1,2 , Mary sol Azocar 1 , Carolina Moya, Gabriela Mancilla 1 , Pablo Pedreros 1 & Ricardo Figueroa 1. ... Castella, E., H. Adalsteinsson, J. Brittain, G. Gislason, A. Lehmann, V. Lencioni, B. Lods-Crozet, B. Maiolini, A. Milner, J. Olafsson, S ...

... 3 , CAROLINA MOYA 1 , ALEJANDRA OYANEDEL 1 , JACQUELINE SALVO 1 , VIVIANA OLMOS 1 ... En términos faunísticos, Jerez (2000) y Pizarro-Araya & Jerez (2004) delimitan áreas de ... Miserendino 2006), c) estudios sobre la dieta de diferentes especies (Díaz-Villanueva & ...

The Chilean Patagonia includes one of the most complex hydrological systems of South America and one of the least modified systems of the world. These systems were intensely modified by the glacial activity of the Quaternary. The objectives of this study were to ...

Abstract The subduction earthquake Mw = 8.8 on February 27th, 2010 which affected Chile's south-central coast (37°S) produced a co-seismic uplift of ~1.4 m in coastal Tubul-Raqui wetland area, with abrupt morphological changes. In order to determine the magnitude of the changes, in this area of high conservation value, salt marsh morphological features were identified and quantified by mapping the changing extent of the coverage of morphological features before (2009) and after (2011–2012) the tectonic disturbance. Rectified satellite images of seven study sites were created for the three years using Google Earth images and processed in ArcGIS. The results indicate a total decline of 31.7% in the area of the morphological features and the emergence of 1.25 km2 of dried area; salt pans and tidal creeks were severely affected, with more than 90% loss. In contrast, there was a slight recovery of the Tubul and Raqui main river channel (12%) and the tidal channels (8.5%) between 2011 and 2012, mainly in the area near the river mouth. The salt marsh (cover by Spartina densiflora) showed slight variation after the co-seismic uplift (14.6%), demonstrating high tolerance in the face of high-impact natural disturbances. The changes and later evolution may be explained mostly by the action of the seismic cycle in subduction zones. Continuing to monitor state of the recovery of the salt marsh and other similar environments may help to understand the true role that the seismic cycle plays in the dynamics of coastal ecosystems, as well as its incidence in the recovery process.

Abstract Coseismic uplift, as caused by high-magnitude earthquakes, can modify shoreline morphologies and the functioning of coastal wetlands. This phenomenon occurred with the 8.8-Richter scale earthquake that affected central-south Chile in 2010. The recorded coseismic uplift was 1.6 m.a.s.l. significantly changed the Tubul-Raqui Saltmarsh. The most important impact of this event was decreased marine intrusion, which, in turn, led to desiccation within the saltmarsh and, consequently, the death of aquatic organisms. This study recorded the effects that physical/chemical changes in water quality and the sedimentary environment had on the macrobenthic community (>500 μm) 2, 6, and 10 months after the uplift event, with data compared against historical records. Non-metric multidimensional scaling evaluated changes in the biological community, while principal components analysis was used to assess environmental changes. Both matrices were adjusted through correlation. Significant pre-versus post-earthquake modifications were found at sites closest to the estuary inlet. The most significantly affected macroinvertebrate was Paracorophium hartmannorum. The most tolerant taxa to environmental perturbations (i.e., Diptera, Annelid, and Polychaeta) surpassed pre-earthquake abundance records after just ten months, whereas the most sensitive taxa were not found after the earthquake. Most (81.8%) variables of water quality (i.e., total suspended/inorganic/organic solids and chlorophyll-a), as well as the sedimentary environment (i.e., sediment redox potential, fine fraction, and area of emerged bed), were significantly correlated with the macrobenthic community. The results of this study show the resilience capacity of important components of a saltmarsh after a major natural disturbance.

Given the great extent of the Tubul-Raqui marshland, in addition to its high biodiversity and biological productivity, combined with a low degree of human disturbance, this wetland corresponds to one of the most important ones in Chile. This chapter describes its main features and effects caused by the February 2010 earthquake. The wetland continues to provide nesting and shelter sites for numerous resident and migratory bird species, many of which have conservation problems. The major anthropogenic threats to the conservation of the wetland and its different habitats have historically been bird hunting and deforestation of river shores that affect the sedimentation of the rivers that feed it. As for the structure of the physical habitat, water quality and aquatic biota of the wetland, since the earthquake of 2010 a series of relevant environmental changes have occurred. Some of them were expressed immediately during the earthquake, while others still continue to manifest themselves...

ABSTRACT Reproductive and population-level responses are ecologically relevant diagnostic tools for revealing the cost of long-term tolerance to contaminants. Spatial density distribution, seasonal density, biomass, size frequency histograms and oocytes stages in Perinereis gualpensis (Polychaeta: Nereididae) from a highly anthropogenically impacted estuary (Lenga, south-central Chile) were compared with low-polluted estuaries (Tubul and Raqui). Spatial distribution showed that the highest P. gualpensis abundances occur in the central (middle) estuarine area, establishing them as suitable zones for comparisons of estuaries. Middle areas also showed differences among estuaries in terms of population and reproductive responses. Mature stage oocytes and juvenile recruitment limited to certain seasons and low adult survival led to significant low densities and biomasses in Lenga individuals (p < .05). Conversely, high densities and biomass, continuous recruitment and mature oocyte occurrence were observed in Tubul–Raqui estuaries. These results reflected population and reproductive differences among high- and low-polluted estuaries, suggesting that chronic pollution status in Lenga estuary is a factor to be considered when evaluating these responses.