Papers by Adriana Rico Cernohorska
Ecología en Bolivia, Apr 1, 2020
Studies on the distribution of species and community structure are essential to understand the ef... more Studies on the distribution of species and community structure are essential to understand the effects that environmental change may have on them, regardless of whether it was climatic or human-induced. These studies are particularly important in the case of rodent communities, as they are highly diverse and can often serve as biodiversity indicators. The study area, Union Ipiri (La Paz, Bolivia) is a representative of several communities at the front end of human disturbance. The objective of the study was to determine the composition and diversity of rodent communities in two types of habitats, native forest and agroforestry crop, the latter as an anthropogenic disturbed habitat, during the dry season of 2014. We collected 256 individuals, belonging to 10 species of rodents and three species of marsupials. The most abundant species were Oligoryzomys microtis chaparensis, Oligoryzomys sp., Euryoryzomys nitidus and Akodon dayi. Both the richness and diversity showed no significant differences between the two habitats, while the abundance of rodents was higher in the agroforestry crops. Oligoryzomys sp. was the species with the highest proportion of males. And all the above-mentioned four species showed more adults individuals, as expected for the sampled season.
Ecología en Bolivia, Apr 1, 2020
Studies on the distribution of species and community structure are essential to understand the ef... more Studies on the distribution of species and community structure are essential to understand the effects that environmental change may have on them, regardless of whether it was climatic or human-induced. These studies are particularly important in the case of rodent communities, as they are highly diverse and can often serve as biodiversity indicators. The study area, Union Ipiri (La Paz, Bolivia) is a representative of several communities at the front end of human disturbance. The objective of the study was to determine the composition and diversity of rodent communities in two types of habitats, native forest and agroforestry crop, the latter as an anthropogenic disturbed habitat, during the dry season of 2014. We collected 256 individuals, belonging to 10 species of rodents and three species of marsupials. The most abundant species were Oligoryzomys microtis chaparensis, Oligoryzomys sp., Euryoryzomys nitidus and Akodon dayi. Both the richness and diversity showed no significant differences between the two habitats, while the abundance of rodents was higher in the agroforestry crops. Oligoryzomys sp. was the species with the highest proportion of males. And all the above-mentioned four species showed more adults individuals, as expected for the sampled season.
The American Naturalist, Jan 18, 2024
MMWR supplements, Apr 28, 2023
Adolescence is a critical phase of development and is frequently a period of initiating and engag... more Adolescence is a critical phase of development and is frequently a period of initiating and engaging in risky behaviors, including alcohol and other substance use. The COVID-19 pandemic and associated stressors might have affected adolescent involvement in these behaviors. To examine substance use patterns and understand how substance use among high school students changed before and during the COVID-19 pandemic, CDC analyzed data from the nationally representative Youth Risk Behavior Survey. This report presents estimated prevalences among high school students of current (i.e., previous 30 days) alcohol use, marijuana use, binge drinking, and prescription opioid misuse and lifetime alcohol, marijuana, synthetic marijuana, inhalants, ecstasy, cocaine, methamphetamine, heroin, and injection drug use and prescription opioid misuse. Trends during 2009-2021 were assessed using logistic regression and joinpoint regression analyses. Changes in substance use from 2019 to 2021 were assessed using prevalence differences and prevalence ratios, stratified by demographic characteristics. Prevalence of substance use measures by sexual identity and current co-occurring substance use were estimated using 2021 data. Substance use prevalence declined during 2009-2021. From 2019 to 2021, the prevalence of current alcohol use, marijuana use, and binge drinking and lifetime use of alcohol, marijuana, and cocaine and prescription opioid misuse decreased; lifetime inhalant use increased. In 2021, substance use varied by sex, race and ethnicity, and sexual identity. Approximately one third of students (29%) reported current use of alcohol or marijuana or prescription opioid misuse; among those reporting current substance use, approximately 34% used two or more substances. Widespread implementation of tailored evidence-based policies, programs, and practices likely to reduce risk factors for adolescent substance use and promote protective factors might further decrease substance use among U.S. high school students and is urgently needed in the context of the changing marketplaces for alcohol beverage products and other drugs (e.g., release of high-alcohol beverage products and increased availability of counterfeit pills containing fentanyl).
Invasive Alien Species, 2021
Public recognition of problems related to biological invasions has grown exponentially worldwide ... more Public recognition of problems related to biological invasions has grown exponentially worldwide in the last two decades, as the number of species that have moved outside their natural range has grown in quantity and the rate of spread has increased. The huge number of alien species spread worldwide underlines the importance of ecological research for Invasive Alien Species (IAS) and associated evaluation studies. As the list IAS grows, so does their varied negative effects, including direct effects on biodiversity and ecosystems, but also economic impacts from damage, as well as the counter investments made in control and reversal programs. In many countries, studies on the negative effects of IAS have been carried out, as well as measures to control and mitigate the damage caused. The IUCN Global Invasive Species Programme (GISPS) presents data of the 100 worst invasive species around the world (McNeely et al. 2001), many of which are plants. Of the four aquatic plants listed, only Eichhornia crassipes occurs in Bolivia, and of the 32 terrestrial species, 16 are known in Bolivia. Species such as Arundo donax, Mikania micrantha, Sphagneticola trilobata, and Ulex europaeus are locally present, and sometimes abundant like Leucaena leucocephala in some deforested areas in the Andean foothills, where it was introduced as a forage plant (Lowe et al. 2004). Most of the species from temperate areas, such as Heracleum mantegazzianum and Tamarix ramosissima, are still unknown and not registered in the catalog of the vascular plants of Bolivia (Jørgensen
Ecología en Bolivia, Sep 1, 2021
En los últimos años la actividad ganadera en el municipio de Ixiamas al norte de La Paz, Bolivia,... more En los últimos años la actividad ganadera en el municipio de Ixiamas al norte de La Paz, Bolivia, se ha incrementado exponencialmente, lo que ha generado una mayor sobreposición de espacios de uso entre actividades humanas y presencia de animales silvestres. Entre los principales conflictos que se generan en la zona están aquellos que resultan del ataque de jaguares (Panthera onca) al ganado vacuno. En este sentido, conocer la sobreposición entre los espacios utilizados por el jaguar y la actividad ganadera tiene implicancia directa para generar acciones de mitigación de conflictos entre jaguares y ganaderos. Para esto, evaluamos el uso del espacio potencial por el jaguar en zonas ganaderas, mediante la estimación de la probabilidad de ocupación (V) y la probabilidad de detección (p). Se evaluaron dos transectos de 600m en cada unidad de muestreo, cuadrículas de 1x1km?. Se establecieron un total de 74 cuadrículas, de las cuales en 33 se detectaron la presencia del jaguar. Construimos modelos de ocupación utilizando el programa PRESENCE 12.7, empleando un análisis de una especie-una estación con probabilidad de autocorrelación espacial. Estimamos la probabilidad uso de espacio basado en una matriz de presencia/ausencia de rastros indirectos de jaguar (ej. huellas, heces) respecto a ocho covariables de sitio (cantidad de bosque, riqueza de especies presa, distancia a caminos principales/secundarios, centros poblados, capital municipal, ríos y predios) y tres covariables de muestreo (#personas que realizaron el muestreo, tiempo desde la última lluvia y tipo de sustrato) estimadas para cada cuadricula. Los resultados sugieren un W=0.71+0.10 y p=0.61+0.2. Siendo el mejor modelo para la estimación del espacio de uso potencial (Cobertura de Bosque), Al#personas que realizaron el muestreo y tiempo desde la última lluvia) con un AIC=313.59. Con este modelo explicativo, estimamos el uso de espacio potencial del jaguar en toda la región ganadera, obteniendo un mapa con cinco niveles de espacios de uso potencial. Luego, a este se sobrepuso un mapa con la representación del espacio geográfico de estancias ganaderas en el área de estudio. Nuestros resultados sugieren que al menos el 50% de estancias ganaderas presentes en la zona (n=62) se encuentran en lugares de mayor uso potencial por el jaguar. Es así que, nuestros resultados nos permitieron identificar las áreas con mayor probabilidad de conflicto con jaguar, con lo cual es posible generar recomendaciones de mitigación del conflicto a las diferentes estancias presentes en la zona.
1 Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota,... more 1 Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota,10077. La Paz, Bolivia. Email: [email protected] (WC-M) 2 Colección Boliviana de Fauna Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, 10077. La Paz, Bolivia. Email: [email protected]; [email protected] (AR-C) 3 Herbario Nacional de Bolivia, Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, 10077. La Paz, Bolivia. Email: [email protected] (EG-E), [email protected] (EV-C) * Corresponding author
Public recognition of problems related to biological invasions has grown exponentially worldwide ... more Public recognition of problems related to biological invasions has grown exponentially worldwide in the last two decades, as the number of species that have moved outside their natural range has grown in quantity and the rate of spread has increased. The huge number of alien species spread worldwide underlines the importance of ecological research for Invasive Alien Species (IAS) and associated evaluation studies. As the list IAS grows, so does their varied negative effects, including direct effects on biodiversity and ecosystems, but also economic impacts from damage, as well as the counter investments made in control and reversal programs. In many countries, studies on the negative effects of IAS have been carried out, as well as measures to control and mitigate the damage caused. The IUCN Global Invasive Species Programme (GISPS) presents data of the 100 worst invasive species around the world (McNeely et al. 2001), many of which are plants. Of the four aquatic plants listed, only Eichhornia crassipes occurs in Bolivia, and of the 32 terrestrial species, 16 are known in Bolivia. Species such as Arundo donax, Mikania micrantha, Sphagneticola trilobata, and Ulex europaeus are locally present, and sometimes abundant like Leucaena leucocephala in some deforested areas in the Andean foothills, where it was introduced as a forage plant (Lowe et al. 2004). Most of the species from temperate areas, such as Heracleum mantegazzianum and Tamarix ramosissima, are still unknown and not registered in the catalog of the vascular plants of Bolivia (Jørgensen
Acta Theriologica, 2007
Roads and highways represent one of the most important anthropogenic impacts on natural areas and... more Roads and highways represent one of the most important anthropogenic impacts on natural areas and contribute to habitat fragmentation, because they are linear features that can inhibit animal movement, thereby causing barrier effects subdividing the populations adjacent to the roads. The paper examines to what extent a narrow (2-lane) and a wide (4-lane) highways represent barriers for two small mammal species: bank volesClethrionomys glareolus Schreber, 1780 and yellow-necked miceApodemus flavicollis Melchior, 1834, and whether displaced rodents are able to return across roads of different widths. The study was performed at four sites in the Czech Republic. The capture-mark-recapture method was used to determine crossing rates. At two sites, the animals captured close to the road were transferred to the other side and released, to compare return movements across the roads with the movements made by the non-transferred animals. We found that the narrow highway did not prevent movement of neither of the species, although voles crossed only after they had been transferred. Wide highways, on the other hand, completely prevened crossing of both species. While the narrow highways acted at individuals level, the wide highways affected the population subvision.
![Research paper thumbnail of Ocorrência de ectoparasitas no roedor Oligoryzomys microtis em regiões ao norte do Departamento de La Paz, Bolívia
[Occurrence of ectoparasites in rodents of the species Oligoryzomys microtis in northern La Paz Department, Bolivia]](https://attachments.academia-assets.com/81905878/thumbnails/1.jpg)
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2020
The objective of this work was to map and describe the occurrence of rodents and their ectoparasi... more The objective of this work was to map and describe the occurrence of rodents and their ectoparasites in regions to the North of the department of La Paz in Bolivia. From April to May and July to August 2017, 80 Oligoryzomys microtis rodents were captured and 36 random samples of their ectoparasites were analyzed, totaling 458 ectoparasites. Rodents were captured in two types of environments: secondary forest and crops areas, being the second one with greater amount of capture of rodents. Among the ectoparasites, Laelaps sp was the genus with the highest abundance and Mysolaelaps sp with the highest prevalence; the genus Polygenis sp is apparently described for the first time in the Amazon rainforest, requiring more studies to better understand the pathogens transmitted in the parasitism of this flea in rodents due to their importance in the ecosystem and public health.
1 Colección Boliviana de Fauna, Instituto de Ecología, Carrera de Biología, Universidad Mayor de ... more 1 Colección Boliviana de Fauna, Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, 10077. La Paz, Bolivia. Email: [email protected]; [email protected] (ARC), [email protected] (JSB), [email protected] (SRC) 2 Global Change Research Institute Bĕlidla 986/4a 603 00. Brno, Czech Republic. Email: [email protected]; [email protected] (ARC), [email protected] (PK) 3 Texas Tech University, Department of Biological Sciences, Lubbock, TX 79409-3131, USA. Email: [email protected] (JSB) 4 Instituto Nacional de Biodiversidad, (INABIO), Calle Rumipamba 341 y Av. de los Shyris, PB 17-07-8976, Quito, Ecuador,. 5 Institute for Environmental Studies, Faculty of Science, Charles University, Prague 2, Czech Republic. Email: pavel.kindlmann@ centrum.cz (PK) *Corresponding author
Ecología Austral, 2021
Tropical forests conversion to agriculture has increased in recent years, though often followed b... more Tropical forests conversion to agriculture has increased in recent years, though often followed by land abandonment and subsequent conversion to secondary forest. In this study, we evaluated the effect of disturbance on Nymphalid butterfly assemblages in an area of mountain foothill forests in Bolivia by comparing the butterfly diversity and species composition among primary forests, secondary forests and cacao crops. Data were obtained in two seasons, dry and dry-to-wet transition, using two sampling methods (bait traps and hand net). Species richness and butterfly abundance were higher in the understory of primary forests than in crops during the transition season. The sampling method can influence the detection of community variation: with traps, we only detected seasonal variation, while we registered higher abundance in both types of forests than crops with manual sampling, with higher heterogeneity in the understory of primary forests than in crops. There was also a difference...
Mastozoología Neotropical, 2021
Reproductive abnormalities in wild female sigmodontine rodents from northern La Paz, Bolivia. Rep... more Reproductive abnormalities in wild female sigmodontine rodents from northern La Paz, Bolivia. Reproductive abnormalities in wild organisms are rarely reported. In this note we describe the presence of abdominal pregnancies, supernumerary uterine horn, and lithopedions in three common species of sigmodontine rodents of the Northern La Paz Department (Bolivia): Akodon dayi, Euryoryzomys nitidus and Oligoryzomys microtis. These may be due to a weakening in the walls of the uterine horns. It is noteworthy that four of the ve cases found come from agricultural areas, which could suggest a causal link with agrochemicals.
Invasive Alien Species, 2021
We report the first known specimen of the cricetid genus Punomys for Bolivia based on an adult fe... more We report the first known specimen of the cricetid genus Punomys for Bolivia based on an adult female captured in 1987. The specific affinities of this individual are currently unknown as it shares qualitative and quantitative characters with Punomys kofordi and P. lemminus, but also differs substantially from both species; we submit that new specimens are required to arrive to a definitive conclusion as to what species this specimen represents. RESUMEN: Primer registro de Punomys (Rodentia: Sigmodontinae) en Bolivia. En este artículo presentamos el primer registro para Bolivia del roedor cricétido Punomys, basándonos en un espécimen atrapado en 1987 en las afueras de la ciudad de La Paz. Debido a que nuestro espécimen comparte caracteres métricos y cualitativos con las dos especies conocidas del género (Punomys kofordi y P. lemminus) pero al mismo tiempo presenta rasgos únicos, es imposible, en este momento, dilucidar a qué especie pertenece. Sólo se podrá avanzar una hipótesis más definitiva con una muestra un poco más grande.
1 Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota,... more 1 Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota,10077. La Paz, Bolivia. Email: [email protected] (WC-M) 2 Colección Boliviana de Fauna Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, 10077. La Paz, Bolivia. Email: [email protected]; [email protected] (AR-C) 3 Herbario Nacional de Bolivia, Instituto de Ecología, Carrera de Biología, Universidad Mayor de San Andrés, Campus Universitario, Calle 27 Cota Cota, 10077. La Paz, Bolivia. Email: [email protected] (EG-E), [email protected] (EV-C) * Corresponding author
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Papers by Adriana Rico Cernohorska