María Fernanda Alvarez

María Fernanda Alvarez
Instituto de Limnología "Dr. Raúl A. Ringuelet" | ILPLA · Cuenca del Salado

PhD in Biology

About

52
Publications
5,084
Reads
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267
Citations
Citations since 2016
26 Research Items
203 Citations
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201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Additional affiliations
April 2013 - present
Instituto de Limnología "Dr. Raúl A. Ringuelet"
Position
  • PhD Student
April 2007 - April 2013
Universidad Nacional de Mar del Plata
Position
  • PhD Student

Publications

Publications (52)
Article
Zooplankton play a key role in aquatic ecosystems constituting an essential intermediate component in aquatic food webs. Cladocerans in particular are widely studied as model of generalist filter feeders. At the regional level, the cladoceran Daphnia spinulata is found in numerous habitats with wide conductivity range (160 μS cm−1 to 14.000 μS cm−1...
Presentation
Full-text available
Operación Karumbé surge a partir de una necesidad, un ansiado reencuentro, un abrazo contenido por largos meses de pandemia que se materializa en voces, relatos e historias de vida de dos poblaciones que co-habitan el territorio conocido como la “Islita”: tortugas y personas. Exploracuátic@s es un proyecto de educación ambiental a través del juego...
Article
Riparian areas of riverine plains develop extensive floodable areas named riverine wetlands, which are essential to the water cycle balance and ecosystem dynamics. In this study, we contrasted the hydrological and physicochemical variables of riverine wetlands of both peri-urban areas impacted by intensive farming and those of rural areas with the...
Article
Macroalgae in Mar Chiquita coastal lagoon (37 • 40 ′ S, 57 • 23 ′ W, Argentina) settle on small-hard substrates on sediments and complex reef-like structures with tubes and crevices of the invader polychaete Ficopomatus enig-maticus (Fauvel, 1923) acting as ecosystem engineers with multiple community structuring effects. In this study, we compared...
Article
Full-text available
Los bañados de desborde fluvial (BDF) desempeñan un papel integral en la ecología de las cuencas fluviales y en su capacidad de autodepuración. La demanda antrópica de espacio y agua pone en riesgo su biota y los beneficios ecosistémicos que brindan. Los objetivos del trabajo fueron analizar los ensambles de microorganismos que habitan en BDF, rela...
Article
Shallow lakes are complex environments that play an important role in ecology. Their relationships with the surrounding areas make these lentic water bodies susceptible to alterations in response to human activity. For example, the input of polyphenols could be critical in altering species interactions. The shallow lakes located in the pampean plai...
Article
Studies on bidirectional benefactor−beneficiary interactions between organisms have generally neglected the importance of this feedback in trophic levels other than plants. The burrowing crab Neohelice granulata aids the development of larvae of the stem-boring moth Haimbachia sp. nov. within the stems of Spartina alterniflora. In our research, we...
Article
Using C and N isotopic signatures of food web components, we evaluated the land-marine coupling through nutrient flows and the likely changes in the food web structure in tidal channels with contrasting anthropogenic nutrient inputs at a semi desert-macrotidal coastal system (northern Argentine Patagonia). The results showed an increase in the δ13C...
Article
Polychaetes and burrowing crabs are widely distributed in intertidal soft bottom environments, playing an important role in structuring infaunal assemblages through trophic and non-trophic interactions such as bioturbation. In southwestern Atlantic (SWA; 37°40′S, 57°23′W) intertidal mudflats, the polychaetes Laeonereis acuta and Neanthes succinea c...
Conference Paper
Full-text available
Exploracuátic@s es un proyecto de extensión que nació en el año 2015 y que se ha instalado como un espacio educativo y recreativo donde niños y adolescentes de El Retiro y Ringuelet (La Plata) interactúan con un paisaje tan cotidiano para ellos como lo es el arroyo “El Gato”. Desde un enfoque interactivo y lúdico los integrantes del proyecto buscan...
Article
Full-text available
Altered nutrient cycles and consumer populations are among the top anthropogenic influences on ecosystems. However, studies on the simultaneous impacts of human-driven environmental alterations on ecosystem functions, and the overall change in system multifunctionality are scarce. We used estuarine tidal flats to study the effects of changes in her...
Conference Paper
Full-text available
os ambientes someros dulceacuícolas son sistemas con un importante papel ecológico. Al estar vinculados con sus cuencas experimentan cambios como respuesta a las actividades antrópicas que allí se realizan, y esto repercute en sus características. Los polifenoles son producto de la degradación de la materia orgánica e ingresan mayoritariamente en f...
Article
Polyphenols – products of organic-matter decomposition entering water bodies from autochthonous and especially allochthonous sources – affect primary producers, bacterioplankton, and zooplankton to consequently modify food webs. Cladocerans are widely used in research experiments because they constitute the most frequent prey of high-trophic-level...
Article
The magnitude of the outcome of ecosystem engineering is context-dependent, as environmental stress increases, habitat amelioration by ecosystem engineers becomes more relevant. Moreover, individual- and population-level traits of ecosystem engineers seem to affect their ability to reduce environmental stress. In Argentinean Patagonian shores (SW A...
Article
In soft sediments, ecosystem engineers (EEs) may play key roles in modifying habi- tats and therefore affecting bottom-assemblage species. In the southwestern Atlantic mud flats, 2 EEs coexist: the stout razor clam Tagelus plebeius and the burrowing crab Neohelice (Chas - magnathus) granulata. Clams create small depressions (i.e. millimeters), whil...
Poster
Full-text available
La salinidad es un factor clave afectando las características de historia de vida de los bivalvos. La mayoría de ellos responden rápidamente a los cambios de salinidad cerrándose y aislándose del medio, pero aún así se sabe que esta variable tiene diferentes efectos sobre las características fisiológicas y morfológicas. Estos efectos quedan registr...
Conference Paper
Full-text available
A great effort has been made to identify factors that regulate community structure and their consequences on ecosystem functions. Nutrients and herbivores are now well known drivers of plant species abundances and assemblages, and their effects on ecosystem functions through changes in biodiversity have been recently explored mostly on artificial p...
Presentation
Full-text available
La Extensión Universitaria como dispositivo de formación en la cooperación y el compromiso. Durante la trágica inundación del 2 de abril de 2013 en la ciudad de La Plata, los jóvenes dieron cátedra de solidaridad y compromiso, convocándose espontáneamente desde sus grupos de pertenencia: amigos del barrio, compañeros de escuela, grupos parroquiales...
Poster
Full-text available
Las marismas son hábitats importantes en la integridad de los paisajes costeros, actuando como sitios de conexión entre los ecosistemas terrestres y acuáticos. Desde la desembocadura del Río de La Plata (35° 13' S) y hasta el norte de la Patagonia Argentina (40° 50' S), encontramos algunas de las marismas de Spartina spp. más extensas de la costa d...
Conference Paper
Full-text available
Durante la inundación ocurrida el 2 de abril de 2013 en la ciudad de La Plata, los jóvenes, nos dieron cátedra de solidaridad y compromiso, demostrando que constituyen una fuerza increíble que surge y que no se puede parar. Ante esta situación surgió la idea de trabajar con ellos, encauzando sus energías, sus ganas y sus ideas en un proyecto comuni...
Conference Paper
Full-text available
Los lagos someros son ambientes complejos cuyas condiciones ambientales y bióticas pueden experimentar variaciones en cortos períodos de tiempo. La íntima relación que estos ambientes tienen con sus cuencas y con las áreas circundantes los hace susceptibles a cambios como respuesta a actividades antrópicas. En este contexto los polifenoles resulta...
Poster
Full-text available
Los polifenoles son productos refractarios de la descomposición de la materia orgánica e ingresan en los cuerpos de agua por aportes autóctonos y alóctonos (Gross, 1999; Wetzel, 2001); éstos últimos son cuantitativamente los más importantes y dependen en gran parte de los usos de la tierra (ej. Gabellone et al., 2005). Su acción inhibitoria afecta...
Article
Full-text available
Species interactions could mediate species invasive processes. In Mar Chiquita coastal lagoon (37° 40’S, 57° 23°W, Argentine), the invasive reef building polychaete Ficopomatus enigmaticus (Fauvel 1923) enhances the biomass of the red alga Polysiphonia subtilissima Montagne 1840 on reef surfaces, and excludes green macroalgae (mainly Cladophora sp....
Poster
Full-text available
Los efectos de las invasiones biológicas pueden estar mediados por las interacciones entre las especies de la comunidad invadida. En la laguna costera Mar Chiquita (37° 40’S, 57° 23°O), el poliqueto invasor formador de arrecifes Ficopomatus enigmaticus aumenta la biomasa del alga Polysiphonia subtilissima Montagne 1840 sobre la superficie arrecifal...
Article
Full-text available
In the Mar Chiquita coastal lagoon (37° 40′S, 57° 23°W, Argentina), the invasive reef building polychaete Ficopomatus enigmaticus, change the composition and abundance of macroalgae by providing habitat to some species and by excluding others. The magnitude of these effects may be regulated by consumers and nutrients availability. Here we evaluate...
Article
Interactions between organisms are important determinants of species distributions and abundances. Due to the high complexity of interactions between species in natural systems, the outcome of a given interaction can affect others, finally modifying community composition. In South-Western Atlantic intertidal mudflats, the zonation of the burrowing...
Poster
Full-text available
Interactions between organisms are important determinants of species distribution and abundance. Due to the high complexity of interactions between species in natural systems, the outcome of a given interaction can affect others, finally modifying community composition. For example, competition is frequently asymmetric and often the superior compet...
Poster
Full-text available
Biological invasions are a primary research topic because its impact on the status and conservation of natural ecosystems worldwide, with large impact on coastal ecosystems, including estuaries and coastal lagoons. In the SW Atlantic Mar Chiquita coastal lagoon (37° 40'S, 57° 23°W, Argentina) the invasive reef building polychaete Ficopomatus enigma...
Poster
Full-text available
Ecosystem engineers (E.E.) tend to be most dominant in stressful environments. In saltmarshes, the cordgrass Spartina spp. are considered E.E. that attenuate waves, currents and light. However, most of the studies on Spartina as E.E. come from lower latitudes, where plants are generally taller and denser. Moreover, Patagonian coasts are exposed to...
Article
Two cordgrass species of the genus Spartina cohabit in SW Atlantic (southern Brazil 31º48′ S to Argentinean Patagonia, 43º20′ S) salt marshes. Some salt marshes are dominated by the dense-flowered cordgrass Spartina densiflora (which inhabits the upper intertidal level) and others by the smooth cordgrass Spartina alterniflora (which inhabits the lo...
Conference Paper
Full-text available
Biological invasions can modify species distribution of native communities and also their ecological role. Knowing how these changes happen contributes to expanding theoretical and evaluating tools for biological invasions management. We investigated the effects of the reef forming polychaete Ficopomatus enigmaticus invasion on the biomass, distrib...
Conference Paper
Full-text available
En las planicies de marea del Atlántico Sudoccidental la producción secundaria está sustentada en parte por el microfitobentos y la macrofauna está dominada por el poliqueto Laeonereis acuta; en menor abundancia se encuentra Neanthes succinea, un poliqueto cuyo modo trófico podría variar según el contexto ambiental. En estos ambientes la bioturbaci...
Article
The molluscan content from three “marine terraces” (TM) preserved along 250 km of the Santa Cruz province provided 49 molluscan taxa (33 Gastropoda and 16 Bivalvia) and the first Quaternary records for Ataxocerithium pullum, Crepidula protea, C. aculeata, Adelomelon ferrusacii, Brachidontes rodriguezi, Aequipecten tehuelchus, Ostrea tehuelcha, and...
Article
Climatic fluctuations usually change the intensity of existing interactions. Thus, in the context of the global climate change, it is important to consider new potential interactions or changes that may appear. Heavy rainy periods (one of the consequences of global climate change in eastern-central Argentina) can promote flooding in some estuaries...

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Projects

Projects (2)
Project
-Evaluate the effects of changes in land uses in basin on zooplankton assemblages -Evaluate effects on primary producers (phytoplankton) and bacterial loop -Evaluate changes in food webs by polyphenols