Listar Grupo de Investigación en Cambio Ambiental (GRICA) por data de publicación
Mostrando ítems 1-20 de 49
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Lake-level and salinity reconstruction from diatom analyses in Quillagua formation (late Neogene, Central Andean forearc, northern Chile)
(Elsevier, 1999)A sedimentary and micropaleontological study of the Quillagua Formation provides a detailed paleohydrological reconstruction of the lacustrine system which occupied the present-day hyperarid Quillagua–Llamara fore-arc Basin ... -
Identification of the main driving mechanisms in the evolution of a small coastal wetland (Traba, Galicia, NW Spain) since its origin 5700 cal yr BP
(Elsevier, 2007)This paper examines the interdependence among the different forcing factors in the evolution of the Traba coastal wetland (Galicia, NW Spain) based on lithofacies and diatom analyses of three cores reaching the basement. ... -
ENSO and Solar Activity Signals From Oxygen Isotopes in Diatom Silica During Late Glacial-Holocene Transition in Central Andes (18°S)
(Springer, 2010-02)[Abstract] The late glacial-Holocene transition from the Lago Chungará sedimentary record in northern Chilean Altiplano (18°S) is made up of laminated sediments composed of light-white and dark-green pluriannual couplets ... -
Biogeochemical Processes Controlling Oxygen and Carbon Isotopes of Diatom Silica in Late Glacial to Holocene Lacustrine Rhythmites
(Elsevier, 2010-05-19)[Abstract] Biogeochemical cycles and sedimentary records in lakes are related to climate controls on hydrology and catchment processes. Changes in the isotopic composition of the diatom frustules (δ18Odiatom and δ13Cdiatom) ... -
Carbonate and Organic Matter Sedimentation and Isotopic Signatures in Lake Chungará, Chilean Altiplano, During the Last 12.3 kyr
(Elsevier, 2011-05-22)[Abstract] Sediments in lakes in the Andean volcanic setting are often made up of diatomaceous ooze together with volcaniclastics and small amounts of carbonates. Despite their scarcity, carbonates along with organic matter ... -
Climate, catchment runoff and limnological drivers of carbon and oxygen isotope composition of diatom frustules from the central Andean Altiplano during the Lateglacial and Early Holocene
(Elsevier, 2013)Diatom-based carbon and oxygen isotope analyses (δ13Cdiatom and δ18Odiatom) were performed on diatom-rich laminated sediments of Lake Chungará (Andean Altiplano, northern Chile) deposited during the Lateglacial and Early ... -
Challenging Easter Island’s Collapse: The Need for Interdisciplinary Synergies
(Frontiers, 2013-12-17)[Abstract] The reigning paradigm holds that Easter Island suffered a socio-ecological collapse (ecocidal or not) sometime in the last millennium, prior to European contact (AD 1720). We discuss some novel paleoecological ... -
Biogeography and lake morphometry drive diatom and chironomid assemblages’ composition in lacustrine surface sediments of oceanic islands
(Springer, 2014)[Abstract] Subfossil biotic assemblages in lakes’ surface sediments have been used to infer ecological conditions across environmental gradients. Local variables are usually the major drivers of assemblage composition, but ... -
Water Resources Response to Changes in Temperature, Rainfall and CO2 Concentration: A First Approach in NW Spain
(Multidisciplinary Digital Publishing Institute, 2014)[Abstract] Assessment of the diverse responses of water resources to climate change and high concentrations of CO2 is crucial for the appropriate management of natural ecosystems. Despite numerous studies on the impact of ... -
Climatic and lacustrine morphometric controls of diatom paleoproductivity in a tropical Andean lake
(Elsevier, 2015-12)The coupling of lake dynamics with catchment biogeochemistry is considered the key element controlling primary production in mountain lakes at time scales of a few decades to millennia, yet little is known on the impacts ... -
Potential Impact of Climate Change on Suspended Sediment Yield in NW Spain: A Case Study on the Corbeira Catchment
(Multidisciplinary Digital Publishing Institute, 2016)[Abstract] Soil losses and the subsequent sediment delivery constitute significant environmental threats. Climate change is likely to have an impact on the availability of water and therefore on sediment yield in catchments. ... -
Impact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands)
(Elsevier, 2017)Little is known about the effect of top predator introduction in historically fishless communities, especially on remote islands. This issue is important because it might strongly affect climate reconstructions derived from ... -
Holocene Sea Level and Climate Interactions on Wet Dune Slack Evolution in SW Portugal: A Model for Future Scenarios?
(Sage, 2018)[Abstract] We examine the Holocene environmental changes in a wet dune slack of the Portuguese coast, Poço do Barbarroxa de Baixo. Lithology, organic matter, biological proxies and high-resolution chronology provide ... -
Temperature effects explain continental scale distribution of cyanobacterial toxins
(MDPI, 2018-04-13)[Abstract] Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). ... -
Formation and Evolution of Back-Barrier Perched Lakes in Rocky Coasts: An Example of a Holocene System in North-West Spain
(Wiley, 2018-09-22)[Abstract] Coastal back-barrier perched lakes are freshwater bodies that are elevated over sea-level and are not directly subjected to the inflow of seawater. This study provides a detailed reconstruction of the Doniños ... -
The Role of Climate, Marine Influence and Sedimentation Rates in Late-Holocene Estuarine Evolution (SW Portugal)
(Sage, 2019)[Abstract] Estuaries are sensitive to changes in global to regional sea level, to climate-driven variation in rainfall and to fluvial discharge. In this study, we use source and environmentally sensitive proxies together ... -
Evaluation of Cu and Zn Content in Soils and their Interaction with Some Physicochemical Soil Properties
(IOP Publishing, 2019-03-04)[Abstract] The content of metals in soils depends on the combined effect of several factors, which include the properties of the metals themselves and their concentrations in the soil, environmental conditions and soil ... -
Climatic Fluctuations in the Hyperarid Core of the Atacama Desert During the Past 215 ka
(Springer Nature, 2019-03-27)[Abstract] Paleoclimate records from the Atacama Desert are rare and mostly discontinuous, mainly recording runoff from the Precordillera to the east, rather than local precipitation. Until now, paleoclimate records have ... -
Diatom-inferred ecological responses of an oceanic lake system to volcanism and anthropogenic perturbations since 1290 CE
(Elsevier, 2019-07-29)[Abstract] The impacts of natural- and human-induced processes on lake ecosystems in remote oceanic islands remain to be fully elucidated. These lakes are excellent candidates to analyze the importance of anthropogenic ...