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Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region
(AGU Publications, 2016-05-23)
Stable isotope variations and groundwater recharge mechanisms remain poorly understood across the tropics, particularly in Central America. Here stable isotopes (δ18O and δ2H) in groundwater, surface water, and rainfall ...
Tracer-aided modelling reveals quick runo generation and groundwater losses producing young stream ow ages in a tropical rainforest catchment
(2021-05-29)
There is still limited understanding of how waters mix, where waters come from and for how long they reside in tropical catchments. In this study, we used a tracer-aided model (TAM) and a gamma convolution integral model ...
Stable isotopic characterizacion of nitrate wet deposition in the tropical urban atmosphere of Costa Rica
(Springer, 2021-07-13)
Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where ...
Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica
(Research Square, 2021)
Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where ...
Tracing water sources and fluxes in a dynamic tropical environment from observations to modeling
(Frontiers in Earth Science, 2020-11-06)
Tropical regions cover approximately 36% of the Earth’s landmass. These regions are home to 40% of the world’s population, which is projected to increase to over 50% by 2030 under a remarkable climate variability scenario ...
Hydrogeochemical baseline in a human altered landscape of the Central Pacific coast of Costa Rica
(Springer Nature, 2020)
Abstract Groundwater pollution in tropical and human-altered coastal landscapes is receiving novel
attention due to decreasing in annual recharge as a consequence of recurrent droughts and overexploitation, whereby saline ...
Variación mensual de la condición, composición bioquímica (proximal) y ciclo reproductivo del mejillón Mytella guyanensis (Bivalvia Mutilidae)
(Universidad Nacional (Costa Rica), 1989)
Se estudió una población de M. guyanensis en Colorado de Abangares, Guanacaste, Costa Rica. En forma mensual se calcularon tres índices de condición, el porcentaje de carne, el ciclo gametogénico y la composición proximal ...
Anotaciones sobre la historia natural de Euphalerus championi laing (homoptera psyllidae) en Alajuela, Costa Rica
(Universidad Nacional (Costa Rica), 1992)
La súper familia Psylloidea la conforma un grupo de pequeños homópteros del suborden Sternorrhyncha, que miden de uno a ocho milímetros de longitud. Son chupadores de savia floema que se caracterizan por las patas citado ...
Caracterización de la vegetación silvestre circundante y asociada al cultivo del melón (Cucumis melo L) e identificación de especies hospederas de los principales virus que lo afectan y sus vectores
(Universidad Nacional (Costa Rica), 1993)
El presente estudio, se identificaron las hospedadoras naturales de PRSV, WMV-2, CMV y ZYMV por ELISA; y de su principal agente vector phis gossypii Glover, en comunidades vegetales previamente seleccionadas de dos fincas ...
Biología de las especies de phassus y Aeputus (Lepidoptera Hepialidae) en localidades de elevación media en Costa Rica
(Universidad Nacional (Costa Rica), 1989)
La familia Hepialidae, en los pisos premontano y montano bajo de Costa Rica tiene como representantes los géneros Aepytus y Phassus, los cuales presentan diferenciación morfológica entre sí en cuanto a la venación alar y ...