Jose V. Montoya

Jose V. Montoya
Universidad de Las Américas | UDLA · Grupo BIOMAS

PhD Wildlife & Fisheries Sciences

About

25
Publications
16,054
Reads
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446
Citations
Introduction
Ecology of benthos, especially meiofauna and microphytobenthos. Research on amphidromous species along the fresh water-estuarine-marine continuum. Limnology of large tropical floodplain rivers and coastal streams. Water analyses, water quality and habitat assessments, experimental design of field manipulative experiments, measurements of GPP, NEP, R on unconsolidated substrates, field studies and sampling of benthos.
Additional affiliations
September 2018 - present
Universidad de Las Américas
Position
  • Docente Investigador
January 2013 - September 2018
Venezuelan Institute for Scientific Research
Position
  • Research Associate
January 2009 - December 2012
Venezuelan Institute for Scientific Research
Position
  • PostDoc Position
Education
September 2001 - July 2008
Texas A&M University
Field of study
  • Wildlife and Fisheries Sciences, Ecology and Evolutionary Biology
September 1994 - December 1999
Simon Bolívar University
Field of study
  • Biology
March 1990 - July 1993
IUTEMAR, Fundación La Salle de Ciencias Naturales, Margarita
Field of study
  • Oceanography & Aquaculture

Publications

Publications (25)
Article
Full-text available
Global change drivers including eutrophication, hydrological disturbance, climate change, chemical pollution, overexploitation, invasive species, and land-use change are affecting the function and structure of freshwater ecosystems. South American freshwater ecosystems are especially threatened by the combination of rising human pressures on natura...
Article
Biological and ecological aspects of organisms are important to understand the role of species in aquatic ecosystems. Measuring growth rate is useful to analyse these aspects through the estimation of instar and biomass in aquatic insects like shredder trichopterans. We aimed to produce allometric relationships based on larval body parts and case d...
Book
Full-text available
Los estresores ambientales tienen efectos medibles en el ecosistema fluvial y sus organismos, por lo que estos últimos son de interés para estimar la integridad o el estado ecológico de los ríos. En Suramérica los métodos para la evaluación de los ríos varían entre países, con lo cual es necesario conocer cuáles receptores biológicos y ambientales...
Chapter
Full-text available
La red hidrográfica de los llanos de Apure está dominada por sistemas de grandes ríos con extensas planicies inundables, sobre un territorio de relieve plano, en donde los cursos de agua drenan con sentido oeste-este hasta desembocar en el río Orinoco. Los principales ríos de la región son el Apure, Meta, Arauca, Capanaparo y Cinaruco. El objetivo...
Article
Full-text available
Phylloicus is the most species-rich genus of the Neotropical Calamoceratidae. In Venezuela, twelve species are known from the adult stage and, from those, only one has its larval and pupal stages described. Here, we describe and illustrate the larva, pupa, and case of Phylloicus cressae, from a first order stream of the heavily disturbed Tuy River...
Article
Full-text available
Aquatic macroinvertebrates and organic matter (OM) are transported downstream with the current, in a process that is modulated by different mechanisms in the ecosystem. Macroinvertebrate drift and OM transport are processes involving interactions between organisms and the environment at multiple spatial and temporal scales. The objective of this st...
Article
Fire is considered a major threat to forest conservation in the Neotropics. Palaeoecological studies are critical for understanding the long-term interactions of climate, fire, and human activities in the savanna–forest dynamic. Here, new data from palynological analyses conducted in sedimentary records from the northern edge of the Amazon Basin, t...
Poster
Full-text available
The genera Armases Abele, 1992 and Sesarma Say, 1817 comprise a rather large group of small sesarmid crabs, distributed throughout most tropical and subtropical regions. These species have invaded a wide variety of environments such as, intertidal, terrestrial and freshwater habitats. From both sides of American continent more than 30 valid species...
Article
Variable hydrology of rivers strongly affects biophysical factors that influence primary production and population densities, thereby affecting the relative influence of bottom-up and top-down processes in trophic networks. Many tropical floodplain rivers have sustained seasonal flood pulses driven by precipitation patterns of the Intertropical Con...
Article
Full-text available
We studied seasonal and diel changes of shrimp abundance in sandbanks of the Cinaruco River, a tropical floodplain tributary of the Orinoco River. Paired diurnal and nocturnal samples were collected from seven river-channel sandbanks during different periods of an annual hydrological cycle. We collected 3730 shrimp representing two families: Serges...
Article
Full-text available
Asthenopus angelae is reported for the first time from Venezuela, extending its distribution to the Orinoco River basin. Habitat type and limnological characteristics of the sampling locality (Laguna Larga, Cinaruco river, Apure state) are described. The morphology of the nymphs and a male subimago are illustrated.
Conference Paper
Full-text available
It is generally assumed that leaf litter with varying chemical composition may show different rates of mass loss, dissolved organic carbon (DOC) release, and DOC biodegradability. Leaf litter is composed of different organic compounds, which may differ in their release rates. Some authors consider leaf litter chemical quality (carbon to nitrogen ra...
Conference Paper
Full-text available
Leaching is defined as the abiotic process by which soluble compounds of the litter are released into the water. Most studies dealing with leaf litter breakdown and leaching kinetics apply the single exponential decay model since it corresponds well with the understanding of the biology of decomposition. However, during leaching important mass loss...
Article
Full-text available
Hydrological seasonality is a strong force driving the changes in ecological patterns and processes occurring in large tropical floodplain rivers. The natural flow regime regulates ecosystem functioning in many ways, including geomorphological modeling of fluvial landscapes and serving as environmental signals that rule life histories of organisms....
Conference Paper
Background/Question/Methods Morichal in the Orinoco basin are one of the most carbon-accumulating ecosystems. These groundwater dependent ecosystems are markedly affected by human water extraction from the phreatic level. The water drawdown probably decreases the capability of Morichal to accumulate carbon. Soil aggregate is a known path of stabi...
Article
1. Through analyses of a 34-year record of phytoplankton, zooplankton and physicochemical parameters from Lake Kinneret, Israel, we show that distinct and persistent phytoplankton assemblage states occurred from winter to summer. 2. The most obvious characteristic of these states was the presence or absence of a spring bloom of the dinoflagellate,...
Article
Full-text available
We examined primary production, respiration, and nutrient dynamics in littoral areas of the mainstem and lagoons of the Cinaruco, a nutrient-poor river in the Venezuelan llanos. Gross primary productivity (GPP) was relatively high, given the poor nutrient conditions in this river. Seasonal variability in net ecosystem production (NEP) was also high...
Article
Full-text available
The Cinaruco River, a lowland floodplain river in the Venezuelan llanos, has a strongly seasonal hydrology, low nutrient concentrations, and high fish diversity and abundance. Fish exclosure/enclosure experiments were conducted in the littoral zone of the river channel and connected lagoons to examine seasonal variation in the magnitude of fish eff...
Article
Full-text available
Our study evaluated spatiotemporal variation of physicochemical parameters and benthic and sestonic algal biomass in littoral areas of the main channel and floodplain lakes of the Cinaruco River, a lowland tributary of the Orinoco River in Venezuela. The Cinaruco is characterized by a highly predictable annual flood pulse, high transparency, and ex...
Article
Full-text available
The Cinaruco River, an oligotrophic ecosystem in the Venezuelan llanos (savanna), has strong seasonal hydrology and supports large populations of ecologically diverse fishes. The relative contributions of autochthonous and allochthonous production sources that support high stocks of secondary consumers are undetermined in this river. We used excita...

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Projects

Projects (4)
Project
En este estudio se propuso como objetivo conocer si para estas especies existían diferencias o no en sus periodos y aspectos reproductivos. Se realizaron muestreos mensuales durante un ciclo anual (2012-2013) evaluándose las características de la estructura poblacional con base en los patrones de abundancia, proporción de sexos y distribución del tamaño. También se comparó entre especies y épocas del año (lluvia y sequía) sus periodos y aspectos reproductivos (rendimiento, fecundidad y madurez sexual). Adicionalmente se describió el desarrollo embrionario para ambas espescies. Trabajamos en publicación.
Archived project
Estudiar la influencia del C orgánico biodegradable liberado durante la descomposición anaeróbica de la hojarasca constituida por una especie (monoespecífica) o por más de una especie (mezcla de hojarasca) sobre las relaciones Fe-P en el suelo de un bosque asociado a una planicie de inundación.
Project
The objective of this project is to study the population ecology of crabs and shrimp freshwater species and advance preliminary culture studies. It is intended to meet in the first phase of the natural conditions of the habitats where they live and develop, study the life history of the various species, diet studies in natural conditions and reproductive aspects.