Results 41 to 50 of about 569,797 (126)
Cyanobacterial calcification in modern microbialites at the submicrometer scale [PDF]
Biogeosciences, 2013 The search for microfossils in the geological record has been a long-term challenge. Part of the problem comes from the difficulty of identifying such microfossils unambiguously, since they can be morphologically confused with abiotic biomorphs.
E. Couradeau +6 more
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Journal of Limnology, 2012 Bacterial size and morphology are controlled by several factors including predation, viral lysis, UV radiation, and inorganic nutrients. We observed that bacterial biovolume from the hypolimnion of two oligotrophic lakes is larger than that of bacteria ...
Roberto Bertoni +3 more
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BIO Web of Conferences, 2014 Microbialites are sedimentary formations that are found throughout the geological record and are usually considered as one of the oldest traces of life on Earth.
Benzerara K. +6 more
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Long term picoplankton dynamics in a warm-monomictic, tropical high altitude lake
Journal of Limnology, 2009 Long term analyses of the microbial loop, centred on the picoplankton dynamics, were carried out over a five-year (1998 to 2002) period in Lake Alchichica (Puebla, Mexico), a high altitude tropical athalassohaline lake.
Alfonso LUGO VÁZQUEZ +5 more
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Acta Protozoologica, 2020 The pelagic / anoxic hypolimnion population of Spirostomum teres was investigated as a part of the long-term ciliates’ monitoring (2003–2016) in an oligo- to mesotrophic monomictic hyposaline crater ...
Miroslav Macek +8 more
doaj +1 more source
Sedimentology, Volume 72, Issue 5, Page 1518-1547, August 2025.ABSTRACT Recent interest in Mg‐rich silicate formation stems from its role as a valuable palaeoclimatic indicator in fluvio‐lacustrine environments and its insights into metal geochemical cycling. Traditionally, Mg‐silicate genesis in lacustrine contexts is linked to alkaline or saline conditions in closed, evaporitic basins.
Ramon Mercedes‐Martín +8 more
wiley +1 more source
Late Pleistocene–Holocene environmental fluctuations of southern Chihuahua Desert, Mexico
Journal of Quaternary Science, Volume 40, Issue 4, Page 634-644, May 2025.ABSTRACT Paleoenvironmental reconstructions from the Mexican Chihuahua Desert based on biological proxies are scarce, creating a gap in our understanding of the ecological responses to climate change in this water‐scarce region. Here, we present a paleoenvironmental reconstruction based on geochemical data and biological proxies such as ostracods and ...
C. M. Chávez‐Lara +4 more
wiley +1 more source
Calcium carbonate and phosphorus interactions in inland waters
Limnology and Oceanography Letters, Volume 10, Issue 2, Page 158-178, April 2025.Abstract Phosphorus, an element essential to all life, is impacted by calcium carbonate (CaCO3) co‐precipitation and dissolution dynamics across aquatic ecosystems. Changes to climate, hydrology, and eutrophication, coupled with differences in terminology related to naming CaCO3‐producing ecosystems (i.e., chalk, carbonate, karst, travertine), point to
Jessica R. Corman
wiley +1 more source
Journal of Geophysical Research: Biogeosciences, Volume 129, Issue 12, December 2024.Abstract Isotope hydrological studies to understand groundwater‐surface water interactions in tropical, high‐elevation catchments are limited. These interactions are important in controlling lake water residence time, aqueous biogeochemistry, and water availability for downstream communities and ecosystems. To better comprehend the complexity of spatio‐
Germain Esquivel‐Hernández +8 more
wiley +1 more source
Journal of Limnology, 2013 In the course of a routine water-quality survey in meso-oligotrophic lake Geneva (Switzerland), suspended matter was collected by filtration on 0.2 μm membranes in July and August 2012 at the depth of maximal chlorophyll a (Chl a) concentration (2 mg m–3)
Jean-Michel Jaquet +2 more
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