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Mostrando ítems 1522-1541 de 3122
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House Wrens Troglodytes aedon reduce repertoire size and change song element frequencies in response to anthropogenic noise
(2020-06-09)Anthropogenic noise (≤ 3 kHz) can affect key features of birds’ acoustic communication via two different processes: (1) song-learning, because songbirds need to hear themselves and other birds to crystallize their song, ... -
How many species of Pleurothallidinae are there?
(2019)Subtribe Pleurothallidinae is possibly the most species-rich of all orchid groups. Nevertheless, they are a young group of plants in terms of scientific learning. The last three decades have been the most active with respect ... -
Hub thread removal behaviour in the orb weaver Leucauge mariana (Araneae: Tetragnathidae)
(2020-11-05)Many orb-weaving spiders break the central lines of the hub at the end of web construction. Nevertheless, very little is known of how spiders break these lines and whether this behaviour differs among taxa. Here, we describe ... -
Human Influences On Eastern Tropical Pacific Coral Communities and Coral Reefs
(2016)Coral reefs world-wide have been impacted by direct and indirect human activity and natural disturbances. This has led to the degradation and disappearance of many reef structures. On a basin-wide scale, the natural impact ... -
Human waste used as nesting material affects nest cooling in the clay-colored thrush
(2021-09-01)The internal temperature of nests largely depends on the materials used in their construction because the characteristics of each material affect the isolation of nest walls. In urban environments, the availability of natural ... -
Human-Induced Changes in the Hydrology of the Western United States
(2008-02-22)Observations have shown that the hydrological cycle of the western United States changed significantly over the last half of the 20th century. We present a regional, multivariable climate change detection and attribution ... -
Humedales del Parque Nacional Chirripó, Costa Rica: características, relaciones geomorfológicas y escenarios de cambio climático
(2018-12)The geomorphological, climatological and hydrological characteristics of the high Andean wetlands of the Chirripó National Park (PNCh) are analyzed. The PNCh is located in south-central Costa Rica, Central America. This ... -
Hundreds of nuclear and plastid loci yield novel insights into orchid relationships
(2021)PREMISE: The inference of evolutionary relationships in the species- rich family Orchidaceae has hitherto relied heavily on plastid DNA sequences and limited taxon sampling. Previous studies have provided a robust plastid ... -
(Hydro)climatological studies of climate change and variability in Central America
(2018-06-26)This is the presentation of Hugo Hidalgo at the CORDEX Central America and South America Training Workshop on Downscaling Techniques, in La Paz, Bolivia, June 25 to 27, 2018. -
Hydro-Climatic Variability and Change in Central America. Supporting Risk Reduction Through Improved Analyses and Data
(2017)Floods and droughts are frequent in Central America and cause large social, economic and environmental impacts. A crucial step in disaster risk reduction is to have a good understanding of the causing mechanisms of extreme ... -
Hydrogen production by immobilized Synechocystis sp. PCC 6803
(2016)The ability of the immobilized Synechocystis sp. PCC 6803 cells to produce hydrogen via an indirect light driven process was investigated. Cells were successfully immobilized in a calcium alginate gel matrix. Beads were ... -
Hydrological climate change projections for Central America
(Journal of Hydrology 495: 94–112, 2013-05-04)Runoff climate change projections for the 21st century were calculated from a suite of 30 General Circulation Model (GCM) simulations for the A1B emission scenario in a 0.5 0.5 grid over Central America. The GCM data ... -
Hyperspectral reflectance measurements from UAS under intermittent clouds: Correcting irradiance measurements for sensor tilt
(2021)One great advantage of optical hyperspectral remote sensing from unmanned aerial systems (UAS) compared to satellite missions is the possibility to fly and collect data below clouds. The most typical scenario is flying ... -
I Simposio sobre Cambio Climático y Biodiversidad: Hacia el fortalecimiento de la resiliencia y acciones requeridas ante el Cambio Climático en Latinoamérica
(2019)El cambio climático es una variación significativa y permanente de los patrones globales del clima, sus consecuencias son irreversibles si no se toman las acciones pertinentes. En Latinoamérica, el cambio climático no ... -
ICSEM10 Slideshow
(2020-03-03)This is a slideshow produced for the 10th International Congress on the Systematics and Ecology of Myxomycetes, held in the city of Turrialba (UCR, Sede del Atlántico) in February 2020. -
Identificación de genes y proteínas relacionados con la producción de nanopartículas de selenio en Pseudomonas putida KT2440
(2019)Existen múltiples bacterias que pueden metabolizar selenito a selenio, no obstante, en muchos casos no se conocen bien los mecanismos mediante los cuales estos microorganismos llevan a cabo este proceso, siendo Pseudomonas ... -
Identificación de variantes raras de número de copias en una familia con alta prevalencia de psicosis
(2023)Los trastornos psiquiátricos son enfermedades que afectan los procesos afectivos y cognitivos de las personas y que están presentes en todas las poblaciones humanas. Son padecimientos complejos para los cuales se han ...