A new species of Rhytidognathus (Carabidae, Migadopini) from Argentina

The Migadopini are a small tribe of Carabidae with 47 species that occur in South America, Australia, and New Zealand, in the sub-Antarctic areas. In South America, most of the genera inhabit areas related to sub-Antartic Nothofagus forest except two monogeneric genera, the Ecuadorian genus Aquilex Moret and the Pampean genus Rhytidognathus Chaudoir. These two genera are geographically isolated from the remaining five South American genera. New material of Rhytidognathus from the northeast of Buenos Aires province and from Entre Ríos province permits establishing that the previous records of Rhytidognathus ovalis (Dejean) for Argentina were erroneous and that it belongs to a new species. Based on external morphological characters and from male and female genitalia we describe Rhytidognathus platensis as a new species. In this contribution we provide illustrations, keys, habitat characteristics and some biogeographic considerations on the distribution of Rhytidognathus.Facultad de Ciencias Naturales y Muse

Catalog of the type material in the Herpetology Collection of the Instituto de Biologia Animal (Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo)

The Herpetology Collection of the Instituto de Biología Animal of Mendoza (IBA-FCA UNCuyo) is one of the most important of Argentina, for the type material deposited there and because includes a large number of specimens from central-western Argentina and Patagonia. The collection is in a process of ordering for it to the scientific community to access the material with ease. This arrangement allows recognizing the deposited type material, most of it corresponding to Argentina's species described by J. M. Cei, who conducted his investigations at this institute between 1955 and 1980. Also developed research in the Institute R. Donoso-Barros, J. A. Scolaro, F. Videla, L. P. Castro, G. Macola and V. Roig, among others. The type material comprises a total of 295 specimens, belonging to 38 species, 32 of them being holotypes and 263 paratypes. The materials designated as Neotypes of Liolaemus anomalus Koslowsky, 1896 and Liolaemus melanops Burmeister, 1868 do not constitute type material since the original types were found. Fourteen types that should have been deposited in the collection were not found, including the holotype of Homonota andicola Cei, 1978.The Herpetology Collection of the Instituto de Biología Animal of Mendoza (IBA-FCA UNCuyo) is one of the most important of Argentina, for the type material deposited there and because includes a large number of specimens from central-western Argentina and Patagonia. The collection is in a process of ordering for it to the scientific community to access the material with ease. This arrangement allows recognizing the deposited type material, most of it corresponding to Argentina's species described by J. M. Cei, who conducted his investigations at this institute between 1955 and 1980. Also developed research in the Institute R. Donoso-Barros, J. A. Scolaro, F. Videla, L. P. Castro, G. Macola and V. Roig, among others. The type material comprises a total of 295 specimens, belonging to 38 species, 32 of them being holotypes and 263 paratypes. The materials designated as Neotypes of Liolaemus anomalus Koslowsky, 1896 and Liolaemus melanops Burmeister, 1868 do not constitute type material since the original types were found. Fourteen types that should have been deposited in the collection were not found, including the holotype of Homonota andicola Cei, 1978

Catálogo del material tipo de la Colección Herpetológica del Instituto de Biología Animal (Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo)

The Herpetology Collection of the Instituto de Biología Animal of Mendoza (IBA-FCA UNCuyo) is one of the most important of Argentina, for the type material deposited there and because includes a large number of specimens from central-western Argentina and Patagonia. The collection is in a process of ordering for it to the scientific community to access the material with ease. This arrangement allows recognizing the deposited type material, most of it corresponding to Argentina´s species described by J. M. Cei, who conducted his investigations at this institute between 1955 and 1980. Also developed research in the Institute R. Donoso-Barros, J. A. Scolaro, F. Videla, L. P. Castro, G. Macola and V. Roig, among others. The type material comprises a total of 295 specimens, belonging to 38 species, 32 of them being holotypes and 263 paratypes. The materials designated as Neotypes of Liolaemus anomalus Koslowsky, 1896 and Liolaemus melanops Burmeister, 1868 do not constitute type material since the original types were found. Fourteen types that should have been deposited in the collection were not found, including the holotype of Homonota andicola Cei, 1978.La Colección Herpetológica del Instituto de Biología Animal de Mendoza (IBA-FCA, UNCuyo) es una de las más importantes de la Argentina, por el material tipo en ella depositado, y por la gran cantidad de ejemplares del centro-oeste argentino y de la Patagonia. La colección está en un proceso de ordenamiento lo que permitirá que la comunidad científica pueda acceder al material con facilidad. Este ordenamiento ha permitido reconocer los ejemplares tipos en ella depositados, que en su mayor parte corresponde a especies de la Argentina descriptas por J. M. Cei. Este investigador desarrolló sus investigaciones en el instituto entre 1955 y 1980. También desarrollaron investigaciones en el Instituto R. Donoso-Barros, J. A. Scolaro, F. Videla, L. P. Castro, G. Macola y V. Roig entre otros. En total hay 295 ejemplares tipo pertenecientes a 38 especies, 32 de ellos holotipos y 263 paratipos. Los materiales designados como neotipos de Liolaemus anomalus Koslowsky, 1896 y Liolaemus melanops Burmeister, 1868 no se consideran tipos ya que los ejemplares tipos originales fueron localizados posteriormente. Catorce tipos que deberían estar depositados en la colección no fueron encontrados, entre ellos el holotipo el Homonota andicola Cei, 1978.Fil: Literas, Sofía. Universidad Nacional de Cuyo. Facultad de Ciencias AgrariasFil: Rodríguez, Matías. Universidad Nacional de Cuyo. Facultad de Ciencias AgrariasFil: Pereyra, Enrique. Universidad Nacional de Cuyo. Facultad de Ciencias AgrariasFil: Roig-Juñent, Sergio. Universidad Nacional de Cuyo. Facultad de Ciencias Agraria

A new species of Rhytidognathus (Carabidae, Migadopini) from Argentina

The Migadopini are a small tribe of Carabidae with 47 species that occur in South America, Australia, and New Zealand, in the sub-Antarctic areas. In South America, most of the genera inhabit areas related to sub-Antartic Nothofagus forest except two monogeneric genera, the Ecuadorian genus Aquilex Moret and the Pampean genus Rhytidognathus Chaudoir. These two genera are geographically isolated from the remaining five South American genera. New material of Rhytidognathus from the northeast of Buenos Aires province and from Entre Ríos province permits establishing that the previous records of Rhytidognathus ovalis (Dejean) for Argentina were erroneous and that it belongs to a new species. Based on external morphological characters and from male and female genitalia we describe Rhytidognathus platensis as a new species. In this contribution we provide illustrations, keys, habitat characteristics and some biogeographic considerations on the distribution of Rhytidognathus.Facultad de Ciencias Naturales y Muse

Temporal and altitudinal variations in benthic macroinvertebrate assemblagesin an Andean river basin of Argentina

Fil: Scheibler, Erica Elizabeth. Instituto Argentino de Investigaciones de Zonas Aridas. Laboratorio de Entomología; ArgentinaFil: Claps, María Cristina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología Dr. Raúl A. Ringuelet; ArgentinaFil: Roig-Juñent, Sergio Alberto. IADIZA. CCT. Mendoza; Argentin

Response to water deficit on tree growth from urban forestry of Mendoza city : comparative analysis in sapling trees

El objetivo del trabajo fue evaluar la respuesta de plantas jóvenes de cuatro especies forestales urbanas a diferentes niveles de déficit hídrico. El ensayo se realizó en vivero, durante tres ciclos vegetativos, con plantas de Platanus x hispanica cv. acerifolia (plátano), Morus alba (morera), Fraxinus americana (fresno americano) y Acacia visco (visco). Los tratamientos de riego fueron: control (reposición del 100% transpirado); riego deficitario moderado (reposición del 66% transpirado) y riego deficitario severo (reposición del 33% transpirado). Las variables de respuesta evaluadas fueron altura, diámetro de tallos, área foliar y ancho de anillos de crecimiento. Las plantas bajo riego deficitario severo presentaron disminuciones en todos los parámetros de crecimiento considerados. Acacia visco resultó con crecimientos comparables al control, bajo riego deficitario equivalente al 66% del agua transpirada, con lo cual puede ser considerada especie de interés para forestaciones en condiciones de estrés hídrico moderado.The objective was to evaluate the young plants response of four urban forest species at different levels of water deficit. The manipulative experiment was conducted in nursery for three growing seasons, with saplings of Platanus x hispanica cv. acerifolia (London plane), Morus alba (mulberry), Fraxinus americana (American ash) and Acacia visco (visco). The catering treatments were: control (replacement of 100% water transpired), moderate deficit watering (replacement of 66% water transpired) and severe deficit watering (replacement of 33% water transpired). Response variables measured were height, stem diameter, leaf area and annual tree-rings width. Plants under severe deficit watering showed decreases in all growth parameters considered. Acacia visco under moderate deficit watering equivalent to 66% of transpired water had a growth comparable to control. Therefore, this specie could be considered relevant to new forestations in moderate water stress conditions.Fil: Martínez, Claudia. CONICET. CRICYT. INCIHUSA (Instituto de Ciencias Sociales, Humanas y Ambientales)Fil: Cavagnaro, Juan Bruno. Universidad Nacional de Cuyo. Facultad de Ciencias AgrariasFil: Roig Juñent, Fidel A.. Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA).Fil: Cantón, María Alicia. CONICET. CRICYT. INCIHUSA (Instituto de Ciencias Sociales, Humanas y Ambientales

Impacto de la condición de aridez en el desarrollo ambientalmente sustentable de ciudades oasis : El caso del arbolado urbano en el Área Metropolitana de Mendoza

El modelo de desarrollo urbano del Área Metropolitana de Mendoza se sustenta ambientalmente en una importante estructura verde. Dada la condición árida del emplazamiento y con el objeto de postular estrategias que garanticen su permanencia en el medio urbano, el trabajo cuantifica el grado de tolerancia a la sequía que alcanzan las especies que conforman el arbolado en la ciudad. Se presenta la metodología de análisis y los resultados de la evaluación del impacto del déficit hídrico en el crecimiento de ejemplares jóvenes de “morera” (Morus alba L.), especie cuya representatividad alcanza el 38,27%. Los resultados muestran que las variables de crecimiento -altura y área foliar- están directamente relacionadas a la disponibilidad del recurso hídrico, mientras que el diámetro de tallos crece en mayor medida (10,45%) cuando se aplica un tratamiento de riego que implica un déficit hídrico moderado.The urban development model of Mendoza’s Metropolitan Area is based on an important environmental green structure. Given the arid condition of the site is necessary to quantify the degree of drought tolerance that reaches the species making up the trees in the city. This study seeks to apply strategies to optimize their management and culture so as to ensure their growth in urban areas. The paper presents the analysis methodology and results of the evaluation of the impact of water deficit on growth of young trees of "mulberry” (Morus alba), whose representation reaches 38.27%. The results show that the growth variables -height and leaf area- are directly related to the availability of water resources; while the stem grows in diameter greater extent (10.45%) when applied irrigation treatment that involves a moderate water deficit.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Fire history in the <i>Araucaria araucana</i> forests of Argentina: human and climate influences

Little is known about drivers and trends of historic fire regimes in the Araucaria araucana forests of south-western Argentina. Fire history in these forests was reconstructed by the analysis of 246 fire-scarred partial cross-sections from this fire-resistant tree collected at 10 sites in Neuquén, northern Patagonia. Fire chronologies showed an increase in fire occurrence during the nineteenth century and a sharp decrease since the early twentieth century. The creation of Lanín National Park in 1937, the change in human activities, and the active suppression of wildfires led to a significant increase in mean fire intervals since 1930. In addition to these multidecadal to centennial scale drives of fire frequency, interannual variability in wildfire activity was associated with El Niño-Southern Oscillation. Years of widespread fire are related to negative departures of both Niño 3.4 and Pacific Decadal Oscillation indexes (i.e. La Niña conditions), as well as coincident phases of positive Southern Annular Mode and La Niña events. Temporal variations in the Araucaria fire history in Argentina clearly show the combined effect of human and climate influences on fire regimes. A comparison with previous fire history studies in the Araucaria forests of Chile reveals substantial differences related to differences in human activities on both sides of the Andes and the earlier implementation of protected areas in Argentina.Facultad de Ciencias Agrarias y ForestalesLaboratorio de Investigación de Sistemas Ecológicos y Ambientale

Impacto de la condición de aridez en el desarrollo ambientalmente sustentable de ciudades oasis : El caso del arbolado urbano en el Área Metropolitana de Mendoza

El modelo de desarrollo urbano del Área Metropolitana de Mendoza se sustenta ambientalmente en una importante estructura verde. Dada la condición árida del emplazamiento y con el objeto de postular estrategias que garanticen su permanencia en el medio urbano, el trabajo cuantifica el grado de tolerancia a la sequía que alcanzan las especies que conforman el arbolado en la ciudad. Se presenta la metodología de análisis y los resultados de la evaluación del impacto del déficit hídrico en el crecimiento de ejemplares jóvenes de “morera” (Morus alba L.), especie cuya representatividad alcanza el 38,27%. Los resultados muestran que las variables de crecimiento -altura y área foliar- están directamente relacionadas a la disponibilidad del recurso hídrico, mientras que el diámetro de tallos crece en mayor medida (10,45%) cuando se aplica un tratamiento de riego que implica un déficit hídrico moderado.The urban development model of Mendoza’s Metropolitan Area is based on an important environmental green structure. Given the arid condition of the site is necessary to quantify the degree of drought tolerance that reaches the species making up the trees in the city. This study seeks to apply strategies to optimize their management and culture so as to ensure their growth in urban areas. The paper presents the analysis methodology and results of the evaluation of the impact of water deficit on growth of young trees of "mulberry” (Morus alba), whose representation reaches 38.27%. The results show that the growth variables -height and leaf area- are directly related to the availability of water resources; while the stem grows in diameter greater extent (10.45%) when applied irrigation treatment that involves a moderate water deficit.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Análisis de escala de la riqueza de carábidos (Coleoptera: Carabidae) en América del Sur austral

The southern South America presents a complex history of geomorphological and climatic events, which have modulated and fragmented the southwestern part of the Andes mostly. Given the complexity of the southern landscape, the analysis of the hierarchical components alpha-?, beta-? and gamma-? on carabid diversity allows exploring the responses of species to spatial changes patterns according to the scales of the landscape. In order to understand how spatial scales influence the carabid diversity in southern South America, we used an approach at multiple spatial scales of multiplicative diversity partitioning. We included four spatial scales in our analysis: among 0.25° quadrats, 0.5° quadrats, provinces and biogeographic sub-regions. The results showed that the pattern of carabid distribution is not random, and varies according to the spatial scale. At larger scales ?-diversities are observed to be higher than expected, but lower than expected at smaller scales. This suggests that carabid ensembles are more homogenous than expected, particularly at the scale of 0.5° quadrats. As explanatory factors, glacial/post-glacial events and historical processes may have had an impact on the present species patterns. Furthermore, due to the importance of beta-? diversity on local and regional scales, a promising approach for future studies is to investigate which biogeographic mechanisms seem to determine the species distribution in different provinces.La compleja historia geomorfológica y climática de Sudamérica austral ha modulado y fragmentado particularmente el sector sur de los Andes. Dada la complejidad del paisaje austral, un análisis de los componentes de diversidad alfa-?, beta-? and gamma-? de carábidos, permite explorar los cambios de los patrones espaciales considerando las escalas de paisaje. Para analizar el efecto de la escala espacial sobre la diversidad de carábidos en Sudamérica austral, realizamos un particionamiento multiplicativo de diversidad. Para nuestro análisis incluimos cuatro escalas espaciales, cuadrículas de 0,25°, cuadrículas 0,5°, provincias biogeográficas y sub-regiones biogeográficas. Nuestros resultados muestran que el patrón de distribución de carábidos no es aleatorio. A gran escala se observa que las diversidades beta son mayores a lo esperado, mientras a baja escala son menores a lo esperado. Lo anterior sugiere que los ensambles de carábidos son más homogéneos, principalmente entre cuadrículas de 0,5°. Discutimos el efecto de procesos históricos en el patrón actual de especies. Debido a la importancia de la diversidad beta-? a escala local y regional, es que se da pie a una interesante línea de investigación para entender que mecanismos biogeográficos parecen determinar la distribución de especies en diferentes provincias