Results 11 to 20 of about 28,900 (165)

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

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

Modelo para el control de inundaciones utilizando dos embalses en paralelo

Revista UIS Ingenierías, 2018
Este artículo presenta un modelo matemático que permite simular el comportamiento de embalses en paralelo, como infraestructura primaria para el control de inundaciones, utilizando el concepto de embalse multipropósito.
Rafael Fragozo, Víctor Bedoya, Jesús María López-Lezama   +2 more
doaj   +1 more source

Estimación de pérdidas de agua por evaporación en embalses del Pirineo

Cuadernos de Investigación Geográfica, 2013
En este trabajo se han calculado las tasas de evaporación para láminas de agua en siete estaciones meteorológicas muy próximas a embalses pirenaicos. Los embalses analizados poseen características muy contrastadas en cuanto a su localización, régimen de ...
J. I. López Moreno
doaj   +1 more source

Influence of initial reservoir level on the allocation of seasonal maximum conservation levels

Ingeniería del Agua, 2018
This study proposes a stochastic methodology for the allocation of seasonal dam maximum conservation levels optimizing regular operation and hydrological dam safety.
Ivan Gabriel-Martin, Alvaro Sordo-Ward, Luis Garrote   +2 more
doaj   +1 more source