Buscar
Mostrando ítems 1-10 de 627
Variations in UV radiation in Chile
(1995)
The first observation of UV global radiation in Chile with a portable multichannel radiometer are reported. Four UV wavelengths are included: 305, 320, 340 and 380 nm. Observation latitudes spanning from 18° to 53 °S allow ...
Altitudinal variation in morphological traits of Pinus patula populations from Oaxaca state, Mexico, and its use in the zoningVariación altitudinal en caracteres morfológicos de Pinus patula en el estado de Oaxaca (México) y su uso en la zonificación
(Universidad Austral de Chile, Facultad de Ciencias Forestales y Recursos Naturales., 2017)
Temporal and altitudinal variations in benthic macroinvertebrate assemblages in an Andean river basin of Argentina
(Istituto per lo studio degli Ecosistemi, 2014-02)
Environmental variables and benthic macroinvertebrate assemblages were spatially and seasonally examined over two consecutive years (2000-2002) along a glacier and snowmelt river in the central-west of Argentina where lies ...
Seed germination response to cold stratification period and thermal regime in Phacelia secunda (Hydrophyllaceae): Altitudinal variation in the mediterranean Andes of central Chile
(2000)
The ability to germinate under a variety of environmental conditions is essential for plant species inhabiting a wide range of altitudes and latitudes. Phacelia secunda J. F. Gmel. (Hydrophyllaceae) is a perennial herb ...
Composición y distribución de hepáticas (Marchantiophyta) en un intervalo altitudinal en la Cordillera Oriental de Colombia
(Universidad de Costa Rica, 2018)
Changes in structure and composition of evergreen forests on an altitudinal gradient in the Venezuelan Guayana Shield
(Universidad de Costa Rica, 2012)
Relación clima-crecimiento radial de Polylepis australis en un gradiente altitudinal en las Sierras Grandes de Córdoba, ArgentinaClimate-radial growth relationship of polylepis australis along an altitudinal gradient in the Sierras Grandes de Córdoba, Argentina
(Asociación Argentina de Ecología, 2018-06)
Altitudinal gradients represent strategic sites for studying the relationships between climate and growth in woody species. Polylepis australis Bitt. is an endemic tree of Central and Northwest Argentina mountains, growing ...