Results 11 to 20 of about 90,106 (261)

Climate variability of the tropical Andes since the late Pleistocene [PDF]

open access: yesAdvances in Geosciences, 2009
Available proxy records witnessing palaeoclimate of the tropical Andes are comparably scarce. Major implications of palaeoclimate development in the humid and arid parts of the Andes are briefly summarized.
A. Bräuning
doaj   +1 more source

Four new species of Stenocercus Duméril & Bibron, 1837 (Squamata, Iguania) from the Department of Amazonas in northeastern Peru [PDF]

open access: yesEvolutionary Systematics, 2020
The tropical Andes are known to be the richest and most diverse place on earth. This mountainous region covers almost one third of the Peruvian territory, and its herpetofauna remains poorly known.
Pablo J. Venegas   +5 more
doaj   +3 more sources

In Vitro Seed Germination and Seedling Development of Dracula felix (Luer) Luer—An Orchid Native to Ecuador

open access: yesDiversity, 2023
Effects of daily temperature fluctuations that mimic on-site environmental conditions were tested on seed germination and development in Dracula felix, a native epiphytic orchid from the neotropics.
Paulina H. Quijia-Lamiña   +3 more
doaj   +1 more source

Is rich and rare the common share? Describing biodiversity patterns to inform conservation practices for South American anurans. [PDF]

open access: yesPLoS ONE, 2013
Species richness and range size are key features of biogeographic and macroecological analyses, which can yield a first assessment tool to define conservation priorities. Here we combined both features in a simultaneous analysis, based on range-diversity
Fabricio Villalobos   +3 more
doaj   +1 more source

Large and medium-sized mammals of Buenaventura Reserve, southwestern Ecuador [PDF]

open access: yesCheck List, 2017
Mammals are the third most threatened group of vertebrates and tropical ones are the most endangered according to recent studies. The Buenaventura Reserve protects 20 km2 of Montane Tropical forest in the southwestern part of the Ecuadorian Andes.
Jeronimo Torres-Porras   +3 more
doaj   +3 more sources

Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

open access: yesCuadernos de Investigación Geográfica, 2017
This article presents an overview of glaciation studies in the northern tropical Andes (Venezuela, Colombia and Ecuador) mostly based on glacial geochronological data.
I. Angel, O. Guzman, J. Carcaillet
doaj   +1 more source

Silicate rock weathering and atmospheric/soil CO2 uptake in the Amazon basin estimated from river water geochemistry: seasonal and spatial variations [PDF]

open access: yes, 2003
Using the data of the CAMREX project (1982–1984) on the water geochemistry of the Amazon river and its main tributaries, it was possible to assess the silicate rock weathering processes and the associated consumption of atmospheric/soil CO2, taking into
Mortatti, Jefferson, Probst, Jean-Luc
core   +2 more sources

Environmental degradation risk by water erosion in a water producer Colombian Andes basin

open access: yesCiência e Agrotecnologia, 2021
Globally, soil degradation by water erosion has become one of the major environmental problems in tropical regions, especially under the severe environmental conditions of the Andes. This study aims to detail the soil risk to degradation by water erosion
Daniel Enrique Guauque Mellado   +2 more
doaj   +1 more source

Andean Land Use And Biodiversity: Humanized Landscapes In A Time Of Change [PDF]

open access: yes, 2009
Some landscapes Cannot be understood without reference., to the kinds. degrees, kinds, degrees, and history of human-caused modifications to the Earth's surface.
Brumfield R. T.   +14 more
core   +1 more source

A review of the previously monotypic tribe Dibolostethini (Chelodesmidae: Chelodesminae) with description of two new species and a summary of the Chelodesmidae of the Tropical Andes Biodiversity Hotspot

open access: yesEuropean Journal of Taxonomy, 2023
The chelodesmid genus Dibolostethus Hoffman, 2009, the sole member of the tribe Dibolostethini, is reviewed. The genus contains the type species D.
Jackson C. Means   +6 more
doaj   +1 more source

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