Zaidett Barrientos- PhD
- Research Director at Distance State University
Zaidett Barrientos
- PhD
- Research Director at Distance State University
About
54
Publications
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Introduction
Current institution
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January 2006 - present
Publications
Publications (54)
The Rock pigeon (Columba livia) is a common species in urban parks of the Greater Metropolitan Area of Costa Rica, where control campaigns have failed and little is known about the bird’s populations. Our goals were to compare population size in 2020 with our own estimates from 2014, and to evaluate several hypotheses about possible effects of infr...
Introduction:
The feeding habitats of land snails are essential for their survival. Some are little known, for example the upper surface of leaves, habitat of tropical arboreal and shrub snails.
Objective:
To analyze the feeding behavior and preferences in the feeding habitat of the tropical snail Tikoconus costarricanus.
Methods:
In a humid mont...
The functions of secreted animal mucuses are remarkably diverse, and include lubricants, wet adhesives, protective barriers, and mineralizing agents. Although present in all animals, many open questions related to the hierarchical architectures, material properties, and genetics of mucus remain. Here we summarize what is known about secreted mucus...
Introducción: El integumento de los moluscos terrestres es susceptible a desecación, por eso la selección de microhábitats, la estacionalidad y el comportamiento a lo largo del día son cruciales para su sobrevivencia. No obstante, es poco lo que se ha investigado al respecto, en especial para moluscos tropicales de arbustos del sotobosque en bosque...
Introduction: Many land molluscs survival strategies are still poorly understood or have not been even reported, especially in the Neotropics. Methods: I collected 25 adult Tikoconus (Tikoconus) costarricanus from Reserva Forestal Río Macho, Costa Rica. I kept the specimens for 8 days in terrariums to film their behavior. Objective: To analyse the...
Introduction:
Ecology and natural history of neotropical land snails is almost unknown.
Objetive:
In this paper, I analyse the population dynamics of Tikoconus (Tikoconus) costaricanus Barrientos, an understory endemic euconulid.
Methods:
I compared T. costaricanus’ demography patterns in tropical montane forests in central Costa Rica in three ha...
Un género nuevo de semibabosas (Stylommatophora: Euconulidae) de Costa Rica y revisión del género Velifera (Stylommatophora: Euconulidae). La familia Econulidae tiene distribución circumglobal, pero solo la subfamilia Euconulinae está presente en el continente americano. En Costa Rica hay reportadas 14 especies nativas de euconúlidos. En este traba...
Introducción: La Paloma de Castilla, Columba livia, es considerada una plaga en muchas ciudades del mundo. En las ciudades las personas las alimentan y las medidas de control han fallado, sin embargo, ellas también dan entretenimiento e ingresos económicos a las personas. Objetivo: Identificar las razones porque las personas alimentan a las aves, e...
We describe a new helicoidean semi-slug based on morphological and molecular evidence. The new species belongs to the genus Bunnya and is described from a small agricultural area in Zinacantepec, San Juan de las Huertas, México. The genus Bunnya is externally similar to Xanthonyx, another Helicoidea genus; both genera have similar shell and body fo...
We describe a new helicoidean semi-slug based on morphological and molecular evidence. The new species belongs to the genus Bunnya and is described from a small agricultural area in Zinacantepec, San Juan de las Huertas, México. The genus Bunnya is externally similar to Xanthonyx, another Helicoidea genus; both genera have similar shell and body fo...
We describe a new helicoidean semi-slug based on morphological and molecular evidence. The new species belongs to the genus Bunnya and is described from a small agricultural area in Zinacantepec, San Juan de las Huertas, México. The genus Bunnya is externally similar to Xanthonyx, another Helicoidea genus; both genera have similar shell and body fo...
Stablished in 1971, Poás Volcano was the first Costa Rica National Park. Rich in biodiversity and landscapes due to the physiognomic characteristics and its outstanding attraction it has as an active volcano, Poás is the main protected area of the country and the Central American region in terms of touristic visitation. As protected area it is also...
The Rock Pigeon, Columba livia, is rare in natural environments but extremely successful in urban areas all over the world. Management programs are important because it is considered a pest in many cities. Nevertheless, no appropriate evaluation of methods to estimate urban pigeon populations is available in the literature. We compared three method...
Many methods to prevent bird deaths at windows are ineffective, and some useful methods are expensive or displeasing. Here we offer, for free download, an image that ended bird accidents on large windows near a tropical cloud forest area, and propose hypotheses for its experimental evaluation
Little Red Riding Hood is a widely known classic story and its text has been abundantly analyzed, but no detailed statistical stud- ies have been published about how it has been illustrated. We analyzed 554 images from the public artists’ site DeviantArt (January, 2015); clas- si ed them according to how the wolf, Little Red, and the environment we...
Urban green areas are important to keep balance in the cities, but few studies consider people`s perception of these areas. We evaluated and compared the environmental perception of two urban communities in San José, Costa Rica. The analyzed communities are separated by the Ocloro River; one has a low socioeconomic status and the other a mediumhigh...
Las áreas verdes urbanas son de gran importancia para mantener el equilibrio en las ciudades, sin embargo, hay pocos estudios que analicen la percepción social sobre estas áreas. Realizamos una evaluación comparativa de la percepción ambiental que existe en dos comunidades urbanas de San José, Costa Rica. Las comunidades evaluadas se encuentran sep...
Environmental Education is an important approach for achieving sustainable development. Its main purpose is to improve individuals’ values because they are precursors of actions that favor the environment. Our objective was to determine the impact of an Environmental Education Workshop on the declared attitudes and on the environmental behavior amo...
Currently, two main environmental perceptions are recognized: anthropocentrism and ecocentrism. An ecocentric view is associated with childhood, gender and adolescence; nevertheless, there are not studies regarding the effect of school green areas and budget on environmental perception. We analyze the influence of those elements on the environmenta...
Very little is known about the ecology and biology of Drymaeus tripictus, an extremely rare and endemic land snail species from Costa Rican highlands. I studied the ecology and reproductive biology of D. tripictus from April 2009 through June 2010 in an old forest, a young forest and a Cupressus lusitanica plantation in central Costa Rica. Every th...
The environmental education workshop as a teaching
strategy for sustainability of natural resources in rural Costa Rican
elementary schools. Environmental Education is an important approach
for achieving sustainable development. Its main purpose is to
improve individuals’ values because they are precursors of actions that
favor the environment. Our...
Urban vegetation can have beneficial effects on biodiversity and human health and has been widely studied in
temperate cities. The situation, however, is different in the tropics: there is a knowledge gap describing the
influence of the growth and expansion of tropical cities on vegetation within the cities. There is also a scarcity
of work discuss...
La deserción estudiantil es un problema que los programas de educación superior deben atender con prioridad, dado que provocan inconvenientes a la hora de la acreditación universitaria, son fuente de frustración para los estudiantes y constituyen una pérdida de recursos económicos. El objetivo de este estudio fue determinar si el uso de tecnologías...
Little is known about how restoration strategies affect aspects like leaf litter's quantity, depth and humidity. I analyzed leaf litter's quantity, depth and humidity yearly patterns in a primary tropical lower montane wet forest and two restored areas: a 15 year old secondary forest (unassisted restoration) and a 40 year old Cupressus lusitanica p...
Es común la falsa creencia de que las ciudades son sitios ajenos a la naturaleza. Igualmente es incorrecta la idea de que las ciudades son intrínsecamente malas y carentes de biodiversidad. En realidad, las ciudades son ecosistemas con componentes abióticos como la lluvia y el sol y componentes bióticos que incluyen organismos de los cinco reinos b...
Todas las especies de primates tenemos genéticamente definidos dos extremos de comportamiento. Uno, dirigido hacia quienes comparten sus genes, conduce al bien. El otro, centrado en la obtención de recursos para garantizar el apareamiento y la posterior supervivencia de las crías, permite los actos de maldad. La bioética es una rama de la filosofía...
Recibido 12-IV-2010 Corregido 22-V-2010 Aceptado 24-V-2010 ABSTRACT Urban solid waste generation and management at the National University, Costa Rica: quantitative and sociological patterns. The National University (Costa Rica) established an environmental management program that includes a waste management project. This article evaluates the perf...
Terrestrial mollusks (Mollusca: Gastropoda) of Costa Rica: classification, distribution and conservation. Terrestrial mollusks are poorly known worldwide. The country has 183 reported species, 30% endemic and 7% are probably extinct. About 400 species are expected to inhabit the country. Biology, ecology, distribution, genetics and other areas of r...
Terrestrial mollusks are poorly known worldwide. The country has 183 reported species, 30% endemic and 7% are probably extinct. About 400 species are expected to inhabit the country. Biology, ecology, distribution, genetics and other areas of research are unknown for more than 95% of the species. The most diverse families are Spiraxidae, Orthalicid...
Debido al impacto negativo del ser humano sobre los hábitats terrestres y acuáticos, actualmente es necesaria la restau-ración ecológica de hábitats degradados. Suele confundírsele con la reforestación y la sucesión natural. La restauración ecológica es una actividad tecnológica que recupera en un ecosistema dañado el suelo, el agua, el aire y las...
Normalmente las especies biológicas amplían su dis-tribución hasta donde lo permiten otros organismos y el medio físico-químico. Como el mundo cambia constantemente, siempre se están abriendo nue-vos espacios y cerrándose otros para cada especie. Cuando las especies llegan a espacios nuevos, puede calificárseles de varias formas, por ejemplo como i...
La Meseta Central de Costa Rica representa menos del 4% del territorio del país, pero alberga el 85% de la industria, el 60% de la población, el 70% de la flota vehicular y los tres acuíferos de mayor importancia. El mayor cambio de uso del suelo se ha dado en los últimos 100 años, y actualmente se pueden reconocer tres zonas básicas: la urbana ent...
Student attrition in posgraduate blended programs at the Universidad Estatal a Distancia (UNED), Costa Rica: Desertion or delay? Postgraduate student attrition in blended (traditional and distance) education programs has been little studied. Several theoretical categories have been developed to justify attrition: psychological, academic, sociologic...
Las instituciones de educación superior son las forjadoras del futuro de las naciones, por eso deberían ser las primeras en establecer sistemas de gestión ambiental que permitan a sus estudiantes aprender con el ejemplo. Basado en iniciativas de la comunidad universitaria que empezaron en 1994, la Universidad Nacional (UNA), Costa Rica, inauguró en...
This is the first comprehensive land molluscs check list for Costa Rica, a previously poorly studied tropical country. It is based on a review of the literature from 1862 through 2001, excluding species not specifically reported for Costa Rica (e.g. those ambiguously reported for "Central America"). There are a total of 183 species and subspecies r...
The high biodiversity level in Costa Rica reflects a complex topography as well as species input from South and North America, including the Caribbean. However, terrestrial malacofauna is not very diverse when compared with other groups such as insects. A possible cause is the scarcity of soil rich in calcium carbonate. Endemism is 31% in terrestri...
CLAVE PARA LAS CLASES DE MOLUSCOS Los moluscos se dividen en 7 u 8 clases y aunque son bastante distintas entre si, algunas especies o grupos de especies podrían con-fundir a los principiantes en el estudio de es-te filo. A continuación encontrará una clave sencilla que le puede ayudar a ubicar en clases a los moluscos. Recomiendo utilizar las ilus...
The introduced snail Ovachlamys fulgens (Stylommatophora: Helicarionidae) occurs on cultivated land habitats in Costa Rica, where its macrodistribution seems to be limited by annual mean temperature (20 -27.6°C) and annual precipitation (1 530 - 3 034 and 3 420 - 8 000 mm, with no more than six dry months). This species can be found in litter and o...
The neotropical terrestrial snail Succinea costaricana has become a quarantenary pest in ornamental plants (Dracaena marginata, Dracaenaceae). Specimens were collected in Guápiles. Limón, Costa Rica, where they reached a density of 282 900 individuals/ha. In the field, reproduction is continuous (as is rainfall) and eggs, young and copulating pairs...
Aspects of the biology of Ovachlamys fulgens (Gude 1900) were studied under laboratory conditions in Costa Rica for 16 months. The lifespan of this snail in captivity was about nine months (N= 22) and it could lay viable eggs without mating (N= 40). Oviposition began 42 days after eclosion, when shell diameter averaged 5.12 mm (N= 24). Clutches had...
Resumen BARRIENTOS, Z. & J. MONGE-NAJERA: Geographic homogenity among insect communities in neotropical paramos: a hypothesis test. – Caldasia l8(86): 49-56, 1995.-ISSN 0366-5232. Se comparó las comunidades de insectos de varios páramos neotropicales con base en la literatura y en un muestreo hecho en el Cerro Chirripó, Costa Rica (9° 30'N; 83 30'W...
The behavior of Epiperipatus biolleyi Bouvier was studied in the laboratory. In choice tests, bryophyte vegetation and its associated soil were preferred to grass and its soil. In 87 hr the animals changed artificial burrows 2.89 times. They enter burrows mostly by walking forward and show a tendency to rest facing the entrance. No agressive compet...
Universidad que se dedica sólo a transmitir conocimientos defrauda al pueblo que la sostiene. Ese pueblo vive en un mundo natural, muchas veces desconocido, y, por tanto, carece de idea de los recursos que lo componen... La investigación científica no es un lujo ni es una locura de genios sin norte, ni un pasatiempo de especialistas. Antes bien, es...
A study was undertaken of the 1 529 articles appearing in the journal Turrialba, published over the last forty years by the lnter-American lnstitute for Cooperation on Agriculture. The most frequently recurring themes are plant physiology and pathology, soils and agronomic practices. The number of articles on these themes has increased over recent...
The high biodiversity level in Costa Rica reflects a complex topography as well as species input from South and North America, including the Caribbean. However, terrestrial malacofauna is not very diverse when compared with other groups such as insects. A possible cause is the scarcity of soil rich in calcium carbonate. Endemism is 31% in terrestri...
This is the first comprehensive land molluscs check list for Costa Rica, a previously poorly studied tropical country. It is based on a review of the literature from 1862 through 2001, excluding species not specif- ically reported for Costa Rica (e.g. those ambiguously reported for " Central America"). There are a total of 183 species and subspecie...
Thesis (M.S.)--Universidad de Costa Rica, 1996. Photocopy.
