Now showing items 1-10 of 650
Guía de los áfidos alados de Costa Rica
A guide to the winged aphids of Costa Rica
This guide is a compilation of limited morphological and biological information on the winged morphs of 60 species of aphids that have been collected in Costa Rica. It should not be viewed as a definitive taxnomic treatise ...
Aphididae (Hemiptera: Sternorrhyncha) from Costa Rica, with new records for Central America
Sixty-four aphid species (Hemiptera, Sternorrhyncha: Aphididae) were caught by the authors in Costa Rica during 2008. The Costa Rican aphid catalogue is presented from our data and the records in the literature; it consists ...
The influence of temperature and pH on bacterial community composition of microbial mats in hot springs from Costa Rica
We used the 16S rRNA gene pyrosequencing approach to investigate the microbial diversity and community composition in several Costa Rican hot springs alongside the latitudinal axis of the country, with a range of temperatures ...
Un método de transformación genética de maíz para conferirle resistencia ulterior a enfermedades virales
A method for genetic transformation of maize for resistance to viral diseases
A method for genetic transformation of maize for resistance to viral diseases. A system for the genetic transformation of maize was developed for two Costa Rican varieties: CR-7 and Diamantes 8843, that can allow the ...
Reposo y germinación de semillas de Enterolobium cyclocarpum (Fabaceae): resultados de un estudio inédito y un experimento fallido
Seed dormancy and germination of Enterolobium cyclocarpum (Fabaceae): Results of an unpublished work and an unsuccessful experiment
En Costa Rica, se determinó que para reproducir la especie arbórea Enterolobium cyclocarpum (Fabaceae), las semillas seleccionadas deben tener una masa de 0,7 a 1,0 g. En general, mayor masa del fruto implica mayor masa ...
Trichopilia x ramonensis (Orchidaceae), un híbrido natural de Costa Rica
Se describe e ilustra el híbrido natural Trichopilia x ramonensis (T. marginata x T. suavis) de la región de San Ramón, Costa Rica. El nombre de este híbrido se usó por primera vez en 1992; sin embargo, hasta ahora no ...
Myxomycete ecology in urban areas: rapid assessment from two cities
Urban ecology has been an understudied topic in myxomycete research. For that reason, the present investigation aimed to generate data related to myxomycetes in urban areas of the Neotropical region. With an approach of ...
Physarella oblonga-centered bioassays for testing the biological activity of myxomycetes
To study the trypanocidal, antibacterial, antifungal activity and cytotoxicity of myxomycetes, a rapid assessment focused on the species Physarella oblonga was carried out. Optimum conditions for culturing were utilized ...
A biogeographical evaluation of high-elevation myxomycete assemblages in the northern Neotropics
This study represented an effort to apply some of the relatively well-known biogeographical and macroecological models to the observed structure of myxomycete assemblages, with emphasis on the northern Neotropical region. ...
Plants and butterflies of a small urban preserve in the Central Valley of Costa Rica
Costa Rica’s most populated area, the Central Valley, has lost much of its natural habitat, and the little that remains has been altered to varying degrees. Yet few studies have been conducted to assess the need for ...