Now showing items 8071-8080 of 8244
Addressing the Problem of Harmful Algal Blooms in Latin America and the Caribbean- A Regional Network for Early Warning and Response
Harmful algal blooms (HABs) constitute a worldwide problem, affecting aquatic ecosystems, public health and local economies. Supported by the International Atomic Energy Agency since 2009, Latin America and the Caribbean ...
Registro de géneros de ácaros en reinitas (Parulidae) de Costa Rica
Las aves son hospederas de una gran diversidad de ácaros, pueden vivir en la superficie de las plumas, en las patas (Latta 2003) la piel, los nostrilos y las vías respiratorias (Proctor 2003). Los ácaros plumícolas son ...
Phylogenetic systematics of subtribe Spiranthinae (Orchidaceae: Orchidoideae: Cranichideae) based on nuclear and plastid DNA sequences of a nearly complete generic sample
Subtribe Spiranthinae is the most species-rich lineage of terrestrial Neotropical orchids, encompassing > 500 species and 40 genera. We conducted maximum parsimony and maximum likelihood phylogenetic analyses of DNA sequence ...
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. ...
Assemblages of corticolous myxomycetes associated with species of Pinus (Pinaceae) in four different regions of the world
Corticolous myxomycetes associated with four species of pine in different regions of the world were investigated. Samples of bark collected from 20 trees in each region were used to prepare 240 moist chamber cultures, ...
Orchidaceae tonduzianae: Typification of Costa Rican Orchidaceae Described from Collections of Adolphe Tonduz
The Swiss botanist Adolphe Tonduz worked in Costa Rica from 1889 to 1920. For 20 years he carried out important activities as a plant collector and the curator of the largest Costa Rican herbarium beginning at the Instituto ...
Distribution and diversity of begomoviruses in tomato and sweet pepper plants in Costa Rica
Begomoviruses (genus Begomovirus, family Geminiviridae) have emerged as important plant pathogens in tropical and subtropical regions worldwide. Although these viruses were reported during the 1970s in Costa Rica, they are ...
Expanding the application scope of on-farm biopurification systems: Effect and removal of oxytetracycline in a biomixture
Antibiotic-containing wastewaters produced in agricultural activities may depress the pesticidedegrading capacity of biomixtures contained in biopurification systems. This work aimed to assay the effect of oxytetracycline ...
La iridiscencia en plantas es un fenómeno óptico producido por la interacción entre la luz y la estructura de las células, lo que origina un color estructural (no intervienen pigmentos). La luz que incide en las hojas puede ...
Pollinaria: up close and personal
Pollinaria are complex structure, in many cases composed of different elements that originate from different parts of the reproductive organs of the plant.