TY - JOUR A1 - Bernardez, Patricia A1 - Prego, Ricardo A1 - Virginia Filgueiras, Ana A1 - Ospina-Alvarez, Natalia A1 - Santos-Echeandia, Juan A1 - Angel Alvarez-Vazquez, Miguel A1 - Caetano, Miguel T1 - Lithogenic sources, composition and intra-annual variability of suspended particulate matter supplied from rivers to the Northern Galician Rias (Bay of Biscay) JF - Journal of sea research N2 - Scarce research about small European rivers from non-human impacted areas to determine their natural background state has been undertaken. During the annual hydrological cycle of 2008-9 the patterns of particulate supply (SPM, POC, PON, Al, Cd, Co, Cr, Cu, Fe, Ni, Pb, V, Zn) from the rivers Sor, Mera Landro, Lourido and Landoi to the Northern Galician Rias (SW Bay of Biscay) were tackled. No differences in the composition of the SPM were detected for the studied rivers regarding Al, Fe and POC but the relative percentage of particulate trace elements (PTE) discriminate the rivers. So, Cr, Co and Ni in the Lourido, and Landoi rivers, and Cu in the Mera River, are controlled by watershed minerals of Ortegal Geological Complex while for the rest rivers PTE are by granitic and Ollo de Sapo bedrock watershed. Therefore, the imprint of PTE in the parental rocks of the river basins is reflected on the coastal sediments of the Rias. The main process controlling the dynamics and variations of chemical elements in the particulate form is the river discharge. This fact exemplifies that these rivers presents a natural behavior not being highly influenced by anthropogenic activities. KW - SPM KW - Trace metals KW - Organic matter KW - River KW - W Cantabrian coast Y1 - 2017 U6 - https://doi.org/10.1016/j.seares.2017.05.006 SN - 1385-1101 SN - 1873-1414 VL - 130 SP - 73 EP - 84 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Florian, Norbert A1 - Lopez-Luque, Raquel A1 - Ospina-Alvarez, Natalia A1 - Hufnagel, Levente A1 - Green, Andy J. T1 - Influence of a carp invasion on the zooplankton community in Laguna Medina, a Mediterranean shallow lake JF - Limnetica N2 - The common carp (Cyprinus carpio) is a highly invasive species and an ecological engineer. It has been repeatedly shown to increase nutrient concentrations and phytoplankton biomass while destroying submerged macrophytes, although there are few studies from the Mediterranean region. We studied its impact on the zooplankton community in Laguna de Medina lake, a shallow lake in Jerez de la Frontera, south-west Spain. Carp were removed with rotenone in 2007 but returned in 2010-2011. We compared zooplankton sampled monthly from 8 points from May to December in 2008 (without carp) and 2012 (with carp). Extensive macrophyte beds present in 2008 were absent in 2012. As expected, chlorophyll-a concentrations, turbidity, total suspended solids and total phosphorus were much higher in 2012. Zooplankton richness decreased from 21 taxa in 2008 to 8 taxa in 2012, accompanied by a decrease in Shannon-Wiener diversity, an increase in Evenness and a change in size distribution with loss of larger taxa. In 2008, the crustaceans were dominated by the macrocladocerans Daphnia magna and Moina brachiata and the large calanoid copepod Arctodiaptomus salinus. In 2012, these three taxa were completely absent and the zooplankton was dominated by the alien cyclopoid Acanthocyclops americanus and the rotifers Brachionus plicatilis and Keratella quadrata. Our results confirm the disappearance of macrocladocera reported by others in mesocosm experiments with carp, and suggest that alien carp facilitate the spread of the alien copepod A. americanus. KW - Acanthocyclops KW - biomanipulation KW - Cladocera KW - invasive species KW - Mediterranean shallow lake Y1 - 2016 SN - 0213-8409 SN - 1989-1806 VL - 35 SP - 397 EP - 411 PB - Asociación Espanõla de Limnología CY - Mislata (Valencia) ER -