Buscar
Mostrando ítems 31-40 de 238
Phytoplankton and Epipelon Responses to Clear and Turbid Phases in a Seepage Lake (Buenos Aires, Argentina)
(Wiley VCH Verlag, 2009-12)
Annual changes in the algal density and concentrations of chlorophyll a, total phosphorus, and organic matter were analyzed in water and sediments at four sites characterized by the presence or absence of submerged and ...
Natural levels of hydrogen peroxide (H2O2) in deep clear South temperate lakes: Field and laboratory evidence of photo- and biotic production
(Elsevier, 2020-07)
Hydrogen peroxide (H2O2) is a ubiquitous reactive oxygen species (ROS) in aquatic systems and is produced mainly in surface water by the interaction of ultraviolet radiation (UVR) and natural dissolved organic carbon (DOC). ...
Diagnóstico das condições ambientais segundo os parâmetros do IQA em um corpo hídrico lêntico - Lago Igapó I
(Universidade Tecnológica Federal do ParanáLondrinaBrasilEngenharia AmbientalUTFPR, 2019-11-26)
In order to control the quality of urban, periodic monitoring should be carried out regarding the parameters physical, chemical and biological parameters should be done, this being possible through analysis of the Water ...
Nutrient, chlorophyll and zooplankton seasonal variations on the southern coast of a subtropical saline lake (Mar Chiquita, Córdoba, Argentina)
(EDP Sciences, 2016-05)
Mar Chiquita is the largest salt lake in South America. Because of its rich and diverse biodiversity, it has been designated a world site of the Ramsar Convention on Wetlands. Despite its importance, its limnological ...
Mid-Late Holocene Climate and Trophic States in a Shallow Lake from the Southern Pampa Plain, Argentina
(PAGEPress, 2014-06)
Changes in trophic status of the shallow Lake La Brava (southeastern Pampa plain of Argentina) are evaluated based on geochemical, biological and sedimentological data. Based on a conceptual framework, we propose that the ...
Basic limnology of fifty-one lakes in Costa RicaBasic limnology of fifty-one lakes in Costa Rica
(Universidad de Costa Rica, 2003)
Limnology and trophic status of glacial lakes in the tropical Andes (Cajas National Park, Ecuador)
(2017)
The tropical Andes has a high density of glacial lakes that are situated in the high-altitude páramo (3500–4500 m). Ecological information about such lakes is scant despite the fact that these lakes are an important source ...
Microbial abundance patterns along a transparency gradient suggest a weak coupling between heterotrophic bacteria and flagellates in eutrophic shallow Pampean lakes
(Springer, 2014-08)
The aim of this work was to study the components of the microbial food web and the degree of coupling between heterotrophic bacteria (HB) and heterotrophic flagellates (HF) in different shallow lakes of the Pampa Plain ...
Vertical distribution of epiphyton biomass and diversity in a shallow lake during contrasting ecosystem regimes
(Elsevier Science, 2013-10)
We investigated seasonal and depth variations in biomass and composition of bulrush-associated epiphyton in a shallow seepage lake in Argentina and examined whether differences existed in the vertical profiles between ...