Jose Rincon

Jose Rincon
University of Zulia · Department of Biology

PhD in Sciences, Ecology

About

53
Publications
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591
Citations

Publications

Publications (53)
Article
Full-text available
Microbes play a critical role in plant litter decomposition and influence the fate of carbon in rivers and riparian zones. When decomposing low‐nutrient plant litter, microbes acquire nitrogen (N) and phosphorus (P) from the environment (i.e., nutrient immobilization), and this process is potentially sensitive to nutrient loading and changing clima...
Article
Full-text available
Se describe una nueva especie de escarabajo acuático, Phanocerus guaquira, el cual pertenece a la familia Elmidae y cuya característica diagnostica es la forma de su pronoto, con surcos y depresiones que le separan del resto de las especies descritas. Los ejemplares fueron colectados en parches de hojarasca en la quebrada Herrera II, estado Yaracuy...
Article
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The relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies and microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using stand...
Article
Full-text available
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low a...
Article
Full-text available
Running waters contribute substantially to global carbon fluxes through decomposition of terrestrial plant litter by aquatic microorganisms and detritivores. Diversity of this litter may influence instream decomposition globally in ways that are not yet understood. We investigated latitudinal differences in decomposition of litter mixtures of low a...
Article
Full-text available
El Camarón Tigre, Penaeus monodon (Decapoda: Penaeidae), es una especie asiática considerada como exótica en aguas del Océano Atlántico. En este trabajo se confirma la presencia de P. monodon a lo largo de las costas del Sistema del Lago de Maracaibo. Fueron evaluados los puertos pesqueros artesanales de las localidades de Castilletes, Porshoure, K...
Article
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In America, the genus Atopophlebia (Flowers, 1980) has been recorded in Argentina, Bolivia, Colombia, Costa Rica, Ecuador, Bolivia, Panamá and Perú. This mayfly is here reported for the first time in Venezuela. The nymphs were collected in two streams in the Capaz River Basin in the Venezuelan Andes. An updated description of this genus is also pro...
Article
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River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Book
Full-text available
El Parque Nacional Cajas (PNC) constituye un área protegida del sur ecuatoriano, con una importante diversidad de paisajes andinos (páramos, bosques montanos, bosques de Polylepis, entre otros) y de recursos hídricos, faunísticos y florísticos. En particular, los distintos cuerpos de agua presentes (lagunas, quebradas, riachuelos, etc.) en esta ext...
Article
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Leaf-litter breakdown as a tool to assess the functional integrity of high Andean streams of Southern Ecuador. The ecological condition of tropical Andean rivers are threatened by many human activities including changes in land use and cover in watersheds. Current protocols diagnose the structural condition of streams but not their function. In thi...
Article
Full-text available
The ecological condition of tropical Andean rivers are threatened by many human activities including changes in land use and cover in watersheds. Current protocols diagnose the structural condition of streams but not their function. In this study we proposed an assessment tool using the leaf-litter breakdown as a measure of the functional condition...
Article
Plant litter breakdown is a key ecological process in terrestrial and freshwater ecosystems. Streams and rivers, in particular, contribute substantially to global carbon fluxes. However, there is little information available on the relative roles of different drivers of plant litter breakdown in fresh waters, particularly at large scales. We presen...
Article
Many forested headwater streams are heterotrophic ecosystems in which allochthonous inputs of plant litter are a major source of energy. Leaves of riparian vegetation entering the stream are broken down by a combination of biotic and abiotic processes and, in most temperate and boreal streams, provide food and habitat for dense populations of detri...
Article
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The purpose of this research was to determine the toxicity and bioaccumulation of chromium (Cr+6) in the clam Polymesoda solida (Phillippi 1846) from natural populations in the estuarine system of Lake Maracaibo, Venezuela. Acute semi-static bioassays were conducted, with replacement every 48 hours and a period of prior acclimatization 7 to 28 days...
Article
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High species richness of tropical riparian trees influences the diversity of organic detritus entering streams, creating temporal variability in litter quantity and quality. We examined the influence of species of riparian plants and macroinvertebrate exclusion on leaf-litter breakdown in a headwater stream in the Luquillo Mountains of Puerto Rico....
Article
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RESUMEN. Para aproximarse al rol que tiene el cangrejo de río Bottiella niceforei en el procesamiento de materia orgánica, en una corriente intermitente al noroeste de Venezuela, se estudió su dieta natural, mediante el análisis del contenido del tracto digestivo entre junio 2009 y febrero 2010. Se determinó la abundancia de los cangrejos sobre la...
Article
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The aim of this study was to evaluate the glycogen content and determine the tissue condition index (TCI) in samples of the estuarine clam Polymesoda solida collected from different areas in the Lake Maracaibo estuarine system, as an indicator of optimum habitat quality for establishing natural clam banks. Glycogen content was determined using the...
Article
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Aquatic fungi are important decomposers of plant litter in temperate streams. However, these microorganisms have been poorly studied in tropical streams. We assessed the dynamics of aquatic hyphomycetes during the decomposition of Ficus sp. (Moraceae) leaves in an intermittent lowland stream of northwestern Venezuela. Our goals were to: 1) determin...
Article
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The aim of our study was to determine experimentally the influence of the chemical composition of native leaf species on feeding preferences and growth of the tropical shredder Phylloicus sp. We tested whether Phylloicus was able to discriminate among leaf species, and whether leaf species affected its growth rate. The native leaf species selected...
Article
We studied bacterial and fungal colonization during decomposition of leaf litter differing in chemical composition in a small intermittent stream of northwestern Venezuela. Litter bags containing leaves of Tabebuia roseae, Ficus sp, Hura crepitans and Anacardium excelsum were incubated during 42 days in the stream. Six bags were retrieved after 2,...
Article
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Some factors influencing leaf litter breakdown of Anacardium excelsum were examined in two habitats, a pool and a riffle, of Carichuano Creek, a second order intermittent stream of Northwestern Venezuela. Litter bags were incubated in a riffle and a pool section in the stream, and mass loss was determined after 3, 6, 13 and 20 days. The processing...
Article
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Changes in macroinvertebrate assemblages were identified among different flow phases during the dry and rainy seasons in a neotropical intermittent stream in Northwestern Venezuela. Invertebrates and physicochemical parameters were sampled during 9 months to assess temporal changes in biotic and abiotic variables. Macroinvertebrate densities decrea...
Article
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Predictive equations were calculated to estimate dry weight from standard length and cephalic length or width for Chaoborus sp. (Diptera) and Corydalus spp. (Megaloptera), two groups of predatory aquatic insects from River Guasare-Limón Basin, western Venezuela. Regression analysis indicated that relationship between biomass and biometric parameter...
Article
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Algunos factores que influyen sobre el procesamiento de la hojarasca de Anacardium excelsum fueron examinados en un pozo y un rápido en el caño Carichuano, una corriente intermitente de segundo orden ubicada al noroeste de Venezuela. Se incubaron bolsas de hojarasca en dos secciones (pozo y rápido) y la pérdida de peso fue determinada después de 3,...

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