Results 11 to 20 of about 29,197 (180)

Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity. [PDF]

J Fish Biol, 2021
ABSTRACT Freshwater fish communities in Ecuador exhibit some of the highest levels of diversity and endemism in the Neotropics. Unfortunately, aquatic ecosystems in the country are under serious threat and conditions are deteriorating. In 2018–19, the government of Ecuador sponsored a series of workshops to examine the conservation status of Ecuador's ...
Aguirre WE, Alvarez-Mieles G, Anaguano-Yancha F, Burgos Morán R, Cucalón RV, Escobar-Camacho D, Jácome-Negrete I, Jiménez Prado P, Laaz E, Miranda-Troya K, Navarrete-Amaya R, Nugra Salazar F, Revelo W, Rivadeneira JF, Valdiviezo Rivera J, Zárate Hugo E.   +15 more
europepmc   +2 more sources

Modeling nature-based restoration potential across aquatic-terrestrial boundaries. [PDF]

Conserv Biol
Abstract Today, few watersheds remain untouched by global change processes arising from climate warming, impoundments, channelization, water extraction, pollution, and urbanization. The need for restoration has resulted in a myriad of interventions, generally performed at small scales, which have limited measurable impact in restoring biodiversity and
Wegscheider B, Rideout NK, Monk WA, Gray MA, Steeves R, Baird DJ.   +5 more
europepmc   +2 more sources

Gestión óptima de embalses en avenidas incorporando al concepto de incertidumbre : aplicación a embalses con central hidroeléctrica

, 2022
Esta tesis realiza una contribución metodológica al problema de la gestión óptima de embalses hidroeléctricos durante eventos de avenidas, considerando un enfoque estocástico y multiobjetivo. Para ello se propone una metodología de evaluación de estrategias de laminación en un contexto probabilístico y multiobjetivo.
Bianucci, Sandra Paola
openaire   +4 more sources

El seguimiento de los embalses en la demarcación hidrográfica del Ebro. El estado de los embalses aragoneses. [PDF]

, 2014
De los 30 embalses aragoneses, en 2013 se han muestreado, 22. En la tabla 7 se recogen los resultados obtenidos en dichos embalses, ordenados por masa de agua. La representación gráfica de la tabla 7 se puede observar en la figura 6. Del análisis de los datos se aprecia, referente al estado trófico, que de los 22 embalses muestreados la mayor parte son
Rodríguez Pérez, María José, Soria García, Juan Miguel, Durán Lalaguna, Concha.   +2 more
openaire   +2 more sources

Effects of spatial distance and woody plant cover on beta diversity point to dispersal limitation as a driver of community assembly during postfire succession in a Mediterranean shrubland

Ecology and Evolution, Volume 12, Issue 7, July 2022., 2022
In this work we analyze how beta diversity, and its components of turnover and nestedness, change in a herbaceous plant community during the first years following fire, and how they relate to spatial distance and the effect of woody plant cover. We found that dispersal limitation, indicated by an increase in similarity with spatial distance, is the ...
Iván Torres, Antonio Parra, José M. Moreno   +2 more
wiley   +1 more source

What feeds on Quercus ilex L.? A biogeographical approach to studying trophic interactions in a Mediterranean keystone species

Diversity and Distributions, Volume 28, Issue 1, Page 4-24, January 2022., 2022
Abstract Aim Holm oak (Quercus ilex L.) is regarded as a keystone plant species. Trophic interactions may affect the distribution and abundance of phytophagous species, but the number of arthropod species that use holm oak as a food resource and their levels of host specificity are not yet known.
Juan Antonio Hernández‐Agüero, Ildefonso Ruiz‐Tapiador, Luis Cayuela, Francesco Maria Sabatini   +3 more
wiley   +1 more source

Different Couplings Between Precipitation and Deformation at the Same Site: A Case Study at Central Pyrenees (Spain)

Water Resources Research, Volume 57, Issue 11, November 2021., 2021
Abstract Impact of hydrology‐associated deformation spans from the study of the rock hydrological properties and aquifer dynamics to the identification of geological disaster precursors. We analyze a comprehensive set of hydrology‐associated deformation signals, recorded by two underground 70 m long strainmeters (GAL16 and LAB780) operating under the ...
Antonella Amoruso, Luca Crescentini, Riccardo Costa   +2 more
wiley   +1 more source

Patterns of protist distribution and diversification in alpine lakes across Europe

MicrobiologyOpen, Volume 10, Issue 4, August 2021., 2021
Deviations of high‐mountain protist communities from lowland communities are well known but the underlying diversification processes are hardly understood. Here, we studied protist communities in several European high‐mountain ranges and analyzed commonalities and deviations between these sites.
Janina C. Vogt, Jana L. Olefeld, Christina Bock, Jens Boenigk, Dirk C. Albach   +4 more
wiley   +1 more source

Tracing species replacement in Iberian marbled newts

Ecology and Evolution, Volume 11, Issue 1, Page 402-414, January 2021., 2021
Hybrid zone movement has been suggested in the marbled newts, supported by the discovery of a Triturus marmoratus enclave. Here, we tested for a genomic footprint of species replacement of the receding T. marmoratus by the advancing T. pygmaeus, employing 54 newly developed nuclear SNPs and one mitochondrial DNA marker. In the absence of genetic traces
Julia López‐Delgado, Isolde van Riemsdijk, Jan W. Arntzen   +2 more
wiley   +1 more source

Colonization of a Neotropical Reservoir (Córdoba, Argentina) by Ceratium hirundinella (O. F. Müller) Bergh [PDF]

, 2005
Blooms of Ceratium hirundinella (O. F. Müller) Bergh. have been detected in different water bodies in the Neotropical Region since 1990. The colonization began in southern lakes, and during the last decade the dinoflagellate arrived and bloomed in ...
Casco, Maria Adela, Claps, Maria Cristina, Mac Donagh, María Elicia   +2 more
core   +2 more sources