Restauración de Astragalus trifoliatus (Fabaceae)

En esta contribución se intenta clarificar el nombre actual de una especie de Astragalus de Chile, inicialmente descripta como A. trifoliatus por Philippi y luego considerada por Spegazzini bajo A. valparidisiensis. Se concluye que el último nombre es superfluo, por lo que el nombre actual para esta especie endémica, y de distribución restringida, debe ser A. trifoliatus.This contribution intends to clarify the current name of a species of Astragalus from Chile, originally described as A. trifoliatus by Philippi and later considered by Spegazzini as A. valparadisiensis. We concluded that the latter name is a superfluous one, and that the current name of this endemic and restricted species should be A. trifoliatus.Fil: Teillier, S.. Universidad de Chile; ChileFil: Zuloaga, Fernando Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentin

FLORA DEL MONUMENTO NATURAL EL MORADO: ADDENDA ET CORRIGENDA

Este artículo tiene como objetivo mejorar el conocimiento de la flora vascular del Monumento Natural El Morado, ubicado cerca de Santiago en Chile central. El total de especies reportadas se aumenta de 280 a 300, de las cuales 263 son nativas y 37 exóticasThis paper is intended to enhance knowledge of the vascular flora of Monumento Natural El Morado, located near Santiago in central Chile. The total of 280 species reported previously is now increased to 300, of which 263 are native and 37 alie

THE FLORA OF SAN FELIX ISLANDS DESVENTURADAS ARCHIPELAGO CHILE

Volume: 48Start Page: 89End Page: 9

Assessing Habitat Quality When Forest Attributes Have Opposing Effects on Abundance and Detectability: a Case Study on Darwin’s Frogs

Forest management can be used to increase the local abundance of species of conservation concern. To achieve this goal, managers must be sure that the relationships between the targeted forest attributes and the focal species abundance are based on robust data and inference. This is a critical issue as the same forest attributes could have opposing effects on species abundance and the detectability of individuals, impairing our ability to detect useful habitat quality surrogates and to provide correct forest management recommendations. Using spatially stratified capture-recapture models (a.k.a. multinomial N-mixture models), we evaluated the effects of stand-level forest attributes on detection probability and local abundance for the endangered Southern Darwin’s frog (Rhinoderma darwinii), a forest-specialist and fully terrestrial amphibian endemic to the South American temperate forest. Our results show that an increase of stand basal area and a decrease of daily microclimatic fluctuation (i.e. an increase in structural complexity) were positively associated with the local abundance of R. darwinii. These stand-level forest attributes also explained the among-population variation in detection probability, although the relationships were opposite to those for abundance. Consequently, an analysis of raw frog counts (i.e. not adjusted for imperfect detection) did not reveal all the factors associated with local abundance. Our results provide further support to previous claims that raw counts of individuals should not be used, generally, as a proxy of abundance in species inhabiting forest ecosystems and elsewhere. More importantly, the opposite effect of forest attributes on abundance and detectability observed in our study highlights the need to use methods that quantify species-habitat relationships in a robust way and which take habitat-specific imperfect detection into account