Changes in diatom assemblages in an Andean lake in response to a recent volcanic event

Cruces, Fabiola; Urrutia, Roberto; Parra, Óscar; Araneda, Alberto; Treutler, H.; Bertrand, Sébastien; Fagel, Nathalie; Torres, Laura; Barra, Ricardo; Chirinos, Luis

doi:10.1127/0003-9136/2006/0165-0023

Cited by 29 publications

(28 citation statements)

References 19 publications

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“…The increasing abundance of A. granulata thereafter, suggests relatively high trophic status was maintained until 33.0 cal ka BP. Similar shifts in the structure and productivity of the diatom assemblages caused by volcanic disturbance were also noted in other parts of the world, for example Lake Galletué in the Chilean Andes (Cruces et al 2006). The subsequent return to dominance of small Fragilariaceae and benthic taxa indicates renewed aridification and/or cooling, supporting palynological inferences that define the end of MIS 3 at 29.0 cal ka BP.…”

Section: Diatom Responsesupporting

confidence: 54%

Quaternary climate change and Heinrich events in the southern Balkans: Lake Prespa diatom palaeolimnology from the last interglacial to present

et al. 2014

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Lake Prespa, in the Balkans, contains an important palaeo-archive in a key location for understanding Quaternary climate variability in the transition between Mediterranean and central European climate zones. Previous palaeoenvironmental research on sediment cores indicates that the lake is highly sensitive to climate change and that diatoms are likely to be strong palaeohydrological proxies. Here, we present new results from diatom analysis of a ca. 91 ka sequence, core Co1215, which spans the time from the end of the last interglacial to the present. Fluctuations in the diatom data were driven primarily by changes in lake level, as a function of shifts in moisture availability. Warmer interglacial (MIS 5, MIS 1) and interstadial (MIS 3) phases exhibit higher lake levels in spite of enhanced evaporative concentration, underlining the importance of changes in precipitation regimes over time. Low lake levels during glacial phases indicate extreme aridity, common to all Mediterranean lakes. Evidence for fluctuations in trophic status is linked, in part, to lake-level change, but also reflects nutrient enrichment from catchment processes. MIS 5a is characterized by the highest lake productivity in the sequence, but low lake levels, which are ascribed primarily to very low precipitation. On a suborbital timescale, the diatoms provide evidence for correlation to the millennial-scale variability recorded in the Greenland oxygen isotope records and clearly reflect the impact of the Heinrich H6, H5 and H3-1 ice-rafting events, suggesting the dominant influence of North Atlantic forcing in this region. Although the highestamplitude shift in the diatom assemblages occurs

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Section: Diatom Responsesupporting

confidence: 54%

Quaternary climate change and Heinrich events in the southern Balkans: Lake Prespa diatom palaeolimnology from the last interglacial to present

et al. 2014

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“…flamingos) (Vargas et al 2004, Márquez-García et al 2009). Diatom studies conducted in Andean bodies of water in Chile are scarce (Mühlhauser et al 1995, Cruces et al 2006, Rivera & Cruces 2008), due to the difficulty of sampling, the variety of morphological and hydrological characteristics, complexity of the geological patterns of their water bodies, and the wide range of chemical and biological features for these environments. The diatom taxa investigated in these studies are generally epipelics, but some are really planktonic and periphytic.…”

Section: Discussionmentioning

confidence: 99%

Culture and growth of two benthic diatoms species isolated from the Salar del Huasco (North of Chile, 20° S) at different conditions of temperature, light and nutrient

Ramírez¹,

González²,

Cifuentes³

et al. 2015

Gayana Bot.

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Benthic diatoms are cultured usually under laboratory conditions to be used as a food source for other organisms, of aquaculture interest or for biotechnological applications. Laboratory experiments demonstrate the incidence of the physical and chemical variables on abundance and growth rates of diatoms. While macronutrients are usually selected and dosed into common culture mediums to meet the general requirements of a wide range of diatoms, the availability and optimization of micronutrients are more susceptible to each organism's particular physiological conditions. The aim of this study was to characterize the growth of two species of benthic diatoms isolated from the Salar de Huasco in batch cultures at different conditions of temperature (10, 15 and 20 °C), light intensity (40, 80 and 120 μmol m -2 s -1

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“…3). However, the tephra recorded in Lake Galletué is very coarse, with particles as large as 1 cm in diameter; thus, the high porosity could have allowed the percolation of fine sediments (S. Bertrand, unpublished data, 2004) and also the input of chironomids and diatoms (Cruces et al 2006) towards the tephra layer.…”

Section: Chironomidsmentioning

confidence: 99%

Changes of sub-fossil chironomid assemblages associated with volcanic sediment deposition in an Andean lake (38°S), Chile

Araneda¹,

Cruces²,

Torres³

et al. 2007

Rev. chil. hist. nat.

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Changes in diatom assemblages in an Andean lake in response to a recent volcanic event

Cited by 29 publications

References 19 publications

Quaternary climate change and Heinrich events in the southern Balkans: Lake Prespa diatom palaeolimnology from the last interglacial to present

Quaternary climate change and Heinrich events in the southern Balkans: Lake Prespa diatom palaeolimnology from the last interglacial to present

Culture and growth of two benthic diatoms species isolated from the Salar del Huasco (North of Chile, 20° S) at different conditions of temperature, light and nutrient

Changes of sub-fossil chironomid assemblages associated with volcanic sediment deposition in an Andean lake (38°S), Chile

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