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Registros recuperados: 7
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Changes of sub-fossil chironomid assemblages associated with volcanic sediment deposition in an Andean lake (38°S), Chile RChHN
ARANEDA,ALBERTO; CRUCES,FABIOLA; TORRES,LAURA; BERTRAND,SEBASTIEN; FAGEL,NATHALIE; TREUTLER,HANS C; CHIRINOS,LUIS; BARRA,RICARDO; URRUTIA,ROBERTO.
Chironomid assemblages and sedimentological parameters (grain size, organic content, mineralogy) of a short sediment core from Lake Galletué (38°41' S, 71°17' W) were analysed. The sedimentary record includes one volcanic ash (tephra) layer, which has a completely different composition than the host sediment in terms of organic content, grain size, and mineralogy. According to the geochronology (210Pb and 137Cs), this ash layer corresponds to the eruption of Llaima Volcano in 1956-1957. The tephra deposition had an impact on chironomid assemblages producing, among other changes, an increase in Parakiefferiella and a decrease in Ablabesmyia, although no noticeable change was detected in the diversity index. When compared with other studies, our results also...
Tipo: Journal article Palavras-chave: Chironomids; Lake sediments; Tephra layer; Southern Chile.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200002
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Community structure of the intertidal meiofauna along a gradient of morphodynamic sandy beach types in southern Chile RChHN
RODRÍGUEZ,J. GERMÁN; LÓPEZ,JESÚS; JARAMILLO,EDUARDO.
Three sandy beaches located in southern Chile (Gaviotas, Guabún and Mar Brava; ca. 42º S) were studied during the summer of 2000 to analyse the patterns in abundance and biomass of the meiofauna along a gradient of morphodynamic beach types. Sediment samples were collected with metallic cylinders (23 cm² cross sectional area, 120 cm long) at ten equally spaced tidal levels along six transects separated between 5 and 10 m and extending from above the drift line down to the low tide level. Porosity, shear strength, water content, penetrability and grain size of the substrate were measured in each sampling level. The meiofauna was primarily represented by Nematoda and Copepoda Harpacticoidea. The highest average density and biomass per unit of area were found...
Tipo: Journal article Palavras-chave: Sandy beach meiofauna; Southern Chile.
Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000400015
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Community structure of the macroinfauna in the sediments below an intertidal mussel bed (Mytilus chilensis (Hupe)) of southern Chile RChHN
DUARTE,CRISTIAN; JARAMILLO,EDUARDO; CONTRERAS,HERALDO; FIGUEROA,LUIS.
The mytilid mussel Mytilus chilensis (Hupe) can form dense beds in sedimentary areas of the inland coast of the Nord-Patagonic archipelagos of the Chilean coast (ca. 40-43° S). During the autumn of 2002, we collected replicated samples at five intertidal stations in Panitao (Golfo de Reloncaví) ordered along a transect parallel to the low tide level and extended from the center of the bank (stations one and two with 100 and ca. 25 % of mussel cover, respectively) to the bare sediments of the intertidal (stations 3, 4 and 5, without mussels). The macroinfauna was numerically dominated by Polychaeta, Oligochaeta and Crustacea Peracarida. The total number of species collected was 14, being the most abundant the polychaete Perinereis vallata, oligochaetes from...
Tipo: Journal article Palavras-chave: Mussel beds; Mytilus chilensis; Macroinfauna; Southern Chile.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000300007
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Mapping social values of ecosystem services: What is behind the map? Ecology and Society
Rojas, Fernanda; Instituto de Ciencias de la Tierra, Universidad Austral de Chile; Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile; fernanda.rojas@uach.cl; Carmona, Alejandra; Centro de Ciencia del Clima y la Resiliencia (CR2); acarmonas@gmail.com.
A growing interest in mapping the social value of ecosystem services (ES) is not yet methodologically aligned with what is actually being mapped. We critically examine aspects of the social value mapping process that might influence map outcomes and limit their practical use in decision making. We rely on an empirical case of participatory mapping, for a single ES (recreation opportunities), which involves diverse stakeholders such as planners, researchers, and community representatives. Value elicitation relied on an individual open-ended interview and a mapping exercise. Interpretation of the narratives and GIS calculations of proximity, centrality, and dispersion helped in exploring the factors driving participants’ answers. Narratives reveal...
Tipo: Peer-Reviewed Insight Palavras-chave: Cultural ecosystem services; Recreation opportunities; Social value mapping; Southern Chile.
Ano: 2016
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Nudibranchia from the remote southern Chilean Guamblin and Ipún islands (Chonos Archipelago, 44-45° S), with re-description of Rostanga pulchra MacFarland, 1905 RChHN
SCHRÖDL,MICHAEL; GRAU,JOSÉ H.
The southern Chilean archipelago and fjordland (41-52° S) thus far is very poorly investigated also with regard to its nudibranch fauna. This study presents the first records of nudibranchs from remote islands of the Chonos archipelago exposed to the open Pacific. Collecting data and some biological observations are given for the doridoidean Archidoris fontaini, Diaulula punctuolata and Rostanga pulchra. Taxonomically relevant external and radular characters of R. pulchra are redescribed and compared with literature data on conspecifics from Argentina and California. The bipolar, cold-water adapted R. pulchra is critically compared with the western Atlantic, warm-water adapted R. byga. New distributional data indicates that the Chiloé Island area (41-43°...
Tipo: Journal article Palavras-chave: Nudibranchia; Southern Chile; Zoogeography; Taxonomy; Rostanga pulchra.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000100001
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QUANTITATIVE KARYOTYPE OF DIPLODON CHILENSIS (GRAY 1828) (BIVALVIA:HYRIIDAE) Gayana
Jara-Seguel,Pedro; Peredo,Santiago; Palma-Rojas,Claudio; Parada,Esperanza; Lara,Gladys.
The karyotype of a freshwater population of Diplodon chilensis located in La Poza area of the Villarrica Lake (39º18'S; 72º05'W), Southern Chile, was studied. The chromosomes were obtained by squash of cleaving embryos, previously treated with colchicine and fixed in ethanol-acetic acid 3:1 at 4ºC and stained using the Feulgen reaction. Diplodon chilensis showed a diploid karyotype of 2n = 34, with metacentric and submetacentric chromosomes. This work is the first approach to cytogenetic characterization of Chilean populations of this species.
Tipo: Journal article Palavras-chave: Hyriidae; Diplodon chilensis; Karyotype; Freshwater; Bivalves; Southern Chile; Hyriidae; Diplodon chilensis; Cariotipo; Bivalvos dulceacuícolas; Sur de Chile.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382000000200008
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Summer diet comparison between the American Kestrel (Falco sparverius) and Aplomado Falcon (Falco femoralis) in an agricultural area of Araucanía, southern Chile Hornero
Figueroa Rojas,Ricardo A.; Corales Stappung,E. Soraya.
The diet of the American Kestrel (Falco sparverius) and Aplomado Falcon (Falco femoralis) was quantified by analysis of their pellets during the summer 1997-1998 in an agricultural area of Araucanía, southern Chile. By number, the most important prey of the American Kestrel were insects (61% of all individual prey) followed by birds (23%), rodents (13.7%) and reptiles (2.6%). Avian prey accounted for the highest biomass contribution (79.6%), followed by rodents (18%). Biomass contribution of insects and reptiles was negligible. Birds were the staple prey of the Aplomado Falcon both by number (89%) and biomass (99%). Number and biomass contribution of rodent and insect prey was minute. Diet of both raptor species did not broadly overlap. Both the American...
Tipo: Info:eu-repo/semantics/article Palavras-chave: American Kestrel; Aplomado Falcon; Diet overlap; Falco sparverius; Falco femoralis; Prey size; Sicalis luteola; Southern Chile.
Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072004000200002
Registros recuperados: 7
Primeira ... 1 ... Última
 

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