Introduction: The effects of seasonal upwelling on the conditions of the water column and mesozooplankton communities are poorly understood in the coastal zones of the Eastern Tropical Pacific (ETP), despite the important role of upwelling events in the modulation of productivity in these zones. Objective: To evaluate the influence of seasonal upwelling over the Panama Bight on the structure of the water column and mesozooplankton communities in a tropical cove of the ETP. Methods: Hydrographic data and mesozooplankton samples were collected during four field campaigns in Ensenada de Utría (December 2011, February 2012, October 2013, and February 2013), an estuary located in the Northern Pacific coast of Colombia. Non-parametric and multivariate analyses were used to evaluate seasonal differences in the environmental and biotic variables. Results: Surface waters were warm (> 25 °C) and presented low salinities (< 30) throughout the study period. In contrast, subsurface waters were colder (< 20 °C), saltier (> 33), and presented low dissolved oxygen concentrations (< 2.0 ml l-1) during the dry season (January - March), whereas the water column was homogeneous during the rainy season (April - December). Despite the seasonal changes in the environmental conditions, the expected enhancement in the productivity of the system during the dry season (i.e., higher biomass and abundance of the mesozooplankton) only occurred in February 2012. Contrary to expectations, ichthyoplankton abundance was higher during the rainy season, when the assemblage was dominated by the larvae of anchovy (Cetengraulis mysticetus) and an unidentified Gobiidae. Conclusions: The entrance of upwelled waters into Ensenada de Utría is an important factor modulating the seasonal changes observed in the water column. However, there is high interannual variability in the response of mesozooplankton communities to the upwelling events. Because upwelled waters are oxygen-depleted and more acidic, the entrance of upwelled waters into Ensenada de Utría could be causing physiological stress to the benthic and pelagic organisms inhabiting the deepest zones of the cove. This condition may worsen in the future given the predicted increase of deoxygenation and ocean acidification due to climate change.

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Hifomicetos ingoldianos del río Frío (Floridablanca), Santander, Colombia Miconia curvitheca (Melastomataceae), una nueva especie nativa de los bosque altoandinos y subparamos de los Andes centrales, Colombia -Estudios morfológico y taxonómicos en Digitaria Haller (Poaceae: Panicoideae: Paniceae): inventario primer registro de Digitaria velutina (Forssk.) P. Beauv. para Sudamérica -Nuevo registros de Heteroptera (Hemiptera) acuáticos y semiacuáticos de Colombia Comunidades de insectos acuáticos de los tres flancos de la Sierra Nevada de Sant Marta, Colombia -Ecorregiones dulceacuícolas de Colombia: una propuesta par la planificación territorial de la región trasandina y parte de las cuencas del Orinoc y Amazonas -Análisis de producción gonadal del pez Grundulus quitoensis Román Valencia, Ruiz-C. y Barriga, 2005 (Characiformes: Characidae) en la lagun altoandina "El Voladero" provincia El Carchi, Ecuador -Nuevos registros d Heteroptera (Hemiptera) acuáticos y semiacuáticos de Colombia -Ranas del géner Pipa (Anura: Pipidae) de la Orinoquia colombiana: nuevos registros y comentario sobre su taxonomía, distribución e historia natural -Diversidad y recambio d especies de anfibios y reptiles entre coberturas vegetales en una localidad del val del Magdalena medio, departamento de Antioquia, Colombia -La avifauna actu del lago de Tota, Boyacá (Colombia): área importante para la conservación de la aves -Registro de la tortuga caná (Dermochelys coriacea) en el Parque Nacion Natural Gorgona, Pacífico colombiano -Insectos dulceacuícolas depositados en Colección Limnológica de la Universidad de Antioquia, CLUA-035 -Hifomiceto ingoldianos del río Frío (Floridablanca), Santander, Colombia -Miconia curvithec Biota Colombiana ISSN 0124-5376 DOI 10.21068/c001 Volumen 17 Número 2 Julio -diciembre de 2016Biota Colombiana es una revista científica, periódica-semestral, que publica artículos originales y ensayos sobre la biodiversidad de la región neotropical, con énfasis en Colombia y países vecinos, arbitrados mínimo por dos evaluadores externos y uno interno. Incluye temas relativos a botánica, zoología, ecología, biología, limnología, pesquerías, conservación, manejo de recursos y uso de la biodiversidad. El envío de un manuscrito implica la declaración explícita por parte del (los) autor (es) de que este no ha sido previamente publicado, ni aceptado para su publicación en otra revista u otro órgano de difusión científica. El proceso de arbitraje tiene una duración mínima de tres a cuatro meses a partir de la recepción del artículo por parte de Biota Colombiana. Todas las contribuciones son de la entera responsabilidad de sus autores y no del Instituto AbstractMiconia curvitheca (Melastomataceae) is described and the name is validated. This species is restricted to high Andean forests and subparamos and is distributed in the southern and central part of the Central Colombian Cordillera of the Andes between 2900 and 3700 m elevation, from the department of Cauca to the limits of the departments of Quindío, Tolima and Valle del...

Euphausiids migrate vertically in the water column as part of their diel cycle. These migrations make them a key element in the biological pump of the pelagic environment. We took stratified zooplankton samples (0-50, 50-100, and 100-150 m) during the Pacífico-ERFEN campaign in September 2012 to evaluate the vertical distribution of euphausiids around Malpelo Island (3.8 - 4.2 N, 81.4 - 81.8 W). A total of 10 species belonging to four genera were identified. Euphausia diomedeae was the most abundant species in the 0-50 and 100-150 m layers, whereas E. distinguenda was the most abundant species in the 50-100 m layer. Based on quasi-Poisson generalized linear distribution models we found that abundance in the 50-100 m layer was significantly higher than in the 100-150 m layer (t = 3.05, p < 0.05). There were no significant differences associated with sampling hour (diurnal/nocturnal) (t = 0.07, p = 0.94). We calculated a vertical distribution index (VDI) based on abundance, which showed that euphausiid species were concentrated in the 50-100 m layer during day and night. Calyptopis larvae dominated in abundance at all depth layers, followed by furcilia larvae, juveniles and adults. The abundance of the latter increased gradually from the most superficial layer to the deepest layer, whereas juveniles showed the opposite pattern. This is the first study to describe the taxonomic composition, and vertical and spatial distribution of euphausiids associated with Malpelo Island, Colombian Pacific.

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