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Introduction
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September 2009 - January 2012
March 2018 - October 2022
Publications
Publications (32)
![Figura 2. a) Dendrocygna autumnalis, encanecimiento [enc], b)...](profile/Hector-Cadena/publication/389166289/figure/fig2/AS:11431281310960081@1740057167187/Figura-2-a-Dendrocygna-autumnalis-encanecimiento-enc-b-Sarkidiornis-sylvicola-enc_Q320.jpg)
Registros de plumajes atípicos en aves silvestres son cada vez más comunes, y compilar estos registros da luces de las causas o señala las especies más vulnerables. Entre los años 2015 y2024 compilamos registros de plumajes atípicos en especies deaves silvestres ecuatorianas mediante observaciones de campo,búsquedas bibliográficas, en plataformas d...
Describimos el primer registro del Caracara Bayo Milvago chimachima en la provincia de Zamora Chinchipe, sureste de Ecuador. Este registro extiende en 100 km hacia el sur su área de distribución conocida en Ecuador, e incrementa el límite de elevación hasta los 800 m s.n.m. Además, mejora nuestro conocimiento acerca de la distribución de las aves e...
The literature on mixed-species flocks references a wide variety of bird associations. These studies, however, have used an array of unstructured characteristics to describe flocks, ranging from the temporal occurrence of flocking to the identity and behavioural features of constituent members, with little consensus on which key traits define and c...
Species interactions can propagate disturbances across space via direct and indirect effects, potentially connecting species at a global scale. However, ecological and biogeographic boundaries may mitigate this spread by demarcating the limits of ecological networks. We tested whether large-scale ecological boundaries (ecoregions and biomes) and hu...
El interés por estudiar la biodiversidad de las áreas hotspots en el mundo ha ido creciendo en los últimos años, una de estas líneas abarca la búsqueda de microorganismos fotosintéticos productores de metabolitos con aplicaciones biotecnológicas a nivel industrial. Este estudio busca poner las bases de una bioprospección de algas y cianobacterias d...
Species interactions can propagate disturbances across space, though ecological and biogeographic boundaries may limit this spread. We tested whether large-scale ecological boundaries (ecoregions and biomes) and human disturbance gradients increase dissimilarity among ecological networks, while accounting for background spatial and elevational effe...
El Águila Tirana (Spizaetus tyrannus) es una rapaz de amplia distribución en Centro y Suramérica. En Venezuela, esta rapaz se encuen-tra en los bosques húmedos lluviosos del este y sur del Orinoco, así como en los bosques nublados de los Andes y la Cordillera de la Costa hasta los 180 m.s.n.m. (Hilty 2003). El Águila Tirana es rela-tivamente común...
Presentamos nuevos registros documentados de la Cotarita de Ocelos Micropygia schomburgkii en Altos de Pipe, cordillera de la Costa y revisamos la información sobre su distribución en Venezuela. Los nuevos registros incrementan 300 m el límite altitudinal de la especie en el país y sugieren que el área de distribución es más extensa de lo conocido...
Durante los años 2001-2011 en el Parque Nacional Yasuní, en la Amazonía Ecuatoriana, varios investigadores observaron las bandadas mixtas de aves del sotobosque y dosel en una parcela total de 100 ha dividida en cuadrantes de 100m x 100 m, lo que permitió localizar y establecer la posición de cada bandada. Cada investigador tuvo un ‘plot’ de 25 ha...
Information on the diet of some species of tropical parrots is still scarce. We present data on the feeding ecology of the red-eared parakeet Pyrrhura hoematotis, an endemic and poorly known species of Venezuelan montane forests. Additionally, we describe other observations on the diet of the Venezuelan parakeet Pyrrhura emma, scarlet-fronted parak...
Este artículo analiza 61 casos de aberraciones cromáticas del plumaje (ausencia total o parcial de pigmentos en algunas o en todas las plumas) en 43 especies de aves silvestres ecuatorianas, agrupadas en 21 familias, incluyendo 51 nuevos registros y siendo este el primer reporte de aberraciones en Ecuador para 14 familias. Esta compilación incluye...
Este artículo analiza 61 casos de aberraciones cromáticas del plumaje (ausencia total o parcial de pigmentos en algunas o en todas las plumas) en 43 especies de aves silvestres ecuatorianas, agrupadas en 21 familias, incluyendo 51 nuevos registros y siendo este el primer reporte de aberraciones en Ecuador para 14 familias. Esta compilación incluye...
Presentamos nueve registros reproductivos de especies de aves amazónicas realizados en el área
del río Villano, provincia de Pastaza, Ecuador. Detallamos medidas de los huevos de tres especies
y de nidos de dos especies. Además, describimos dos comportamientos de los adultos de Tinamú
Chico Crypturellus soui y Chotacabras Negruzco Nyctipolus nigres...
We describe a predation event on the snake Mastigodryas boddaerty (Colubridae) by the Whistling Heron Syrigma sibilatrix (Ardeidae) in the Venezuelan llanos. The Whistling Heron seems to include snakes occasionally in its diet as indicated by our observation, which also provide the second species of snake recorded in the diet of this heron. © 2015,...
The dispersal syndrome hypothesis states that plant diaspores show morphological features that are the results of adaptation for dispersal by a particular vector. This can enable to identify the relative importance of dispersal agents within plant communities. Nevertheless, there is still little information about seed dispersal spectra and diaspore...
I report an aberrant record of Hoatzin Opisthocomus hoazin in the Andes of Lara, Venezuela. During field work in July 2011 in the Yacambú National Park, in an area of premontane cloud forest, I observed and photographed an individual of O. hoazin in El Blanquito reservoir. This is the first record of the species in Lara State, and apparently the hi...
The remote Nangaritza Valley of southeast Ecuador has high bird diversity, combining Amazonian birds with
species typical of eastern Andean slopes and foothills, a small number of taxa endemic to the Cordillera del Cóndor region
of southern Ecuador and northern Peru, as well as a few forms from the dry Marañón valley region. Here, we update and
rev...
Reportamos nuevos datos que extienden significativamente el rango altitudinal y de distribución del Guácharo Steatornis caripensis en Ecuador. Presentamos información sobre cuatro colonias reproductivas recientemente descubiertas, dos en la vertiente occidental de los Andes (prov. Pichincha y Azuay) y dos en la vertiente oriental (prov. Napo y Zamo...
Records of 28 species that extend our knowledge of their status and distribution in the eastern lowlands of Ecuador are presented, among them the fourth record of Pale-eyed Blackbird Agelastkus xanthophthalmus in the country, only the ninth Ecuadorian locality for Grey-bellied Hawk Accipiter poliogaster, and the first record for prov. Pastaza of Lo...
We present the results of nine ornithological expeditions aimed at
documenting bird diversity in areas of Ecuador that remain relatively under-
explored. The majority of new records were made along the western Andes,
either in the central or the southern extensions of the outer slope, suggesting that
several species may have more continuous dist...
The Royal Sunangel (Heliangelus regalis) is endemic to sandstone ridges in southeast Ecuador and northeast Peru. This hummingbird is currently considered endangered, although little has been published on its natural history, distribution, and conservation. We found H. regalis in three habitat types, but abundance was higher in stunted shrubland, at...
We describe the nest and eggs of the Chestnut-headed Crake (Anurolimnas castaneiceps) based on observations of two nests found in the border of the Lliquino River, Pastaza Province, Ecuador. Nests were found in June and December with birds incubating eggs. Both nests were on fallen logs covered by vines and epiphytes in natural small gaps. They wer...
New occurrence sites for two neartic/neotropical migrants and altitudinal extensions for five
resident species in the Ecuadorian eastern Andean foothills are reported, based on our field
observations along an altitudinal range from 600 to 1600 m elevation within three localities
along the Ecuador-Perú East Andes Endemic Bird Area (EBA). Gathering s...
I studied the membership and foraging behavior of Blue-crowned (Lepidothrix coronata) and White-crowned (Dixipbia pipra) manakins while accompanying mixed-species flocks in Yasuní National Park, Ecuadorian Amazonia. Observations were conducted during 2003-2004 in a 50-ha plot of evergreen tropical rainforest located in the south bank of the Tiputin...
Se describe la posible asociación entre la ardilla Microsciurus flaviventer y bandadas de especies mixtas en la Amazonia ecuatoriana. Estas asociaciones fueron notadas principalmente en la mañana entre las 7:00-8:00 hs. Las ardillas siguieron ocasionalmente a las bandadas (19 participaciones en n = 220 observaciones) y permanecieron con éstas duran...
We present records of seven species of tropical and subtropical distribution found in Quito and
adjacent areas, between 1974 and 2006.We include migrants as well as non-migrant species whose
presence in Quito is notable. Such unusual records might be related to high levels of deforestation
within their natural ranges, incidental migratory routes, o...
Se registra un mirlo común imitando las vocalizaciones del gorrión andino.
Questions
Questions (2)
Nowadays, there are many studies focused in the phylogenetic structure of ecological communities. Most of these studies try to understand what are the causes of phylogenetic clustering or overdispersion, but can someone provide me with a case study of applications of these types of studies in plant or animal conservation? References are appreciated, thanks.
I am trying to assess the phylogenetic diversity of several tropical communities including distinct lineages, and I would be grateful for any references.
