Studies on crustacean communities in Chilean wetlands are scarce. The aim of this study was to characterize the crustacean community in forested wetlands from southern Chile and to establish their relation with the variations in the hydrological regime. In total, 540 samples were taken using three complementary sampling techniques in five wetlands during 2011 and 2012. The results show a total of four species of crustaceans, of which the amphipod Hyalella patagonica (Cunningham, 1871) (Hyalellidae) was dominant in ephemeral wetlands and the isopod Heterias exul (Mueller, 1892) (Janiridae) in permanent wetlands. The other species (the decapods Parastacus pugnax (Poeppig, 1835) (Parastacidae) and Aegla araucaniensis (Jara, 1980) (Aeglidae)) showed abundances below 6% in all wetlands. The identified crustaceans presented marked variations, both at a temporal scale and between wetlands with different hydrological regimes, both at the species level and at the crustacean community level. These patterns were mainly explained by changes registered in the annual hydroperiod and our results conform to the existing information that would indicate the importance of the inclusion of hydrological patterns in descriptions of freshwater communities.
Inland water crustaceans in Chile are characterized by their low species number and marked endemism; this is due to the marked oligotrophy of water bodies and the geographical properties of Chilean territory, which consists of mountains and glaciers. The aim of the present study is to typify the inland water crustaceans in the northern Aysen region (44-46°S), which is branded by the presence of mountains, ice fields and inland seas, with different kinds of water bodies such as large lakes, permanent and ephemeral pools, rivers and streams. The results revealed low species numbers, but the species associations are random, because in many sites the same species frequently reoccur. Nevertheless, there are marked differences in species associations. The present results tend to agree with similar results for the Magallanes region in southern Patagonia and Argentinean Patagonia.
Los ensambles zooplanctónicos en los ecosistemas acuáticos chilenos se caracterizan por presentar un bajo número de especies y un alto predominio de copépodos. El objetivo de este trabajo es presentar la diversidad y distribución de crustáceos zooplanctónicos de los órdenes Calanoida y Cyclopoida en la región de la Araucanía, Chile. Se registraron un total de 8 especies siendo mayor la diversidad de copépodos ciclopoideos, sin embargo los calanoideos fueron más dominantes. De los crustáceos, el orden Cyclopoida es el menos estudiado, existiendo errores en su nomenclatura. Palabras claves: Copepodos, Calanoidea, Cyclopoidea, diversidad. Introducción Los crustáceos de la subclase Copepoda, se encuentran presentes en la mayoría de los hábitat: en ambientes marinos (Kiorboe 1997), asociados a plantas y animales, y en aguas continentales desde aguas superficiales hasta zonas subterráneas (Huys y Boxshall 1991;
La región de la Araucanía (38-39° S) se caracteriza por la presencia de humedales a lo largo de su territorio, los cuales son ecosistemas de gran importancia y con poco conocimiento respecto a su estructura y funcionamiento y sobre la fauna asociada a estos ambientes. El presente trabajo describe la fauna de crustáceos presentes en un humedal costero de la región. Los antecedentes nos señalan una baja riqueza de especies, lo cual puede estar asociado a la depredación generada por especies introducidas y a la alteración del hábitat, el cual deja en manifiesto la falta de estudios que nos pueda permitir un mayor conocimiento de especies asociadas a este tipo de ecosistema. Palabras clave: Crustáceos, Gambusia affinis, Humedal Boscoso, Mahuidanche.
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