Results 21 to 30 of about 23,206 (256)

Diurnal sampling reveals significant variation in CO2 emission from a tropical productive lake

Brazilian Journal of Biology
It is well accepted in the literature that lakes are generally net heterotrophic and supersaturated with CO2 because they receive allochthonous carbon inputs. However, autotrophy and CO2undersaturation may happen for at least part of the time, especially
PCJ Reis, FAR Barbosa
doaj   +1 more source

Zooplankton as an Indicator: A Dramatic Shift in Its Composition Following a Sudden Temporal Brownification of a Tropical Oligotrophic Lake in Southern Mexico

Diversity
Lake Bacalar, a fragile oligotrophic ecosystem located in the southeast of Yucatan Peninsula, Mexico, suffered from a sudden brownification after the tropical storm Cristobal in June 2020 in the Gulf of Mexico.
Manuel Elías-Gutiérrez, Martha Valdez-Moreno, Lucia Montes-Ortiz, Alma E. García-Morales   +3 more
doaj   +1 more source

Thermal structure of the Poraquê lake, Central Amazonian, Brazil - doi: 10.4025/actascibiolsci.v33i2.5150

Acta Scientiarum: Biological Sciences, 2011
Thermal gradient of a Central Amazonian lake was studied to establish a link between seasonal variations in the water level, temperature, suspended particulate matter (SPM) and thermal stratification.
Fabio Marques Aprile
doaj   +1 more source

Water mite predation on zooplankton of a tropical lake [PDF]

Brazilian Journal of Biology, 2002
Water mite (Krendowskia sp.) predation on zooplanktonic species from Lake Monte Alegre (São Paulo State, Brazil) was tested in laboratory experiments. One cladoceran, Daphnia gessneri, two copepods, Tropocyclops prasinus and Thermocyclops decipiens, and Chaoborus larvae III and IV were supplied as prey to adult mites.
CASSANO, C. R., CASTILHO-NOLL, M. S. M, ARCIFA, M. S.   +2 more
openaire   +5 more sources

The Dynamic of Phytoplankton Community Structure in Face of Warming Climate in A Tropical Man-Made Lake

Biosaintifika: Journal of Biology & Biology Education, 2017
In freshwater ecosystems, water temperature plays as an environmental factor that regulates its structure and function. A research on the impacts of changes in temperature to the dynamics of the Phytoplankton community structure has been done.
Sunardi Sunardi, Rina Febriani, Budi Irawan, Mutia Septi Saputri   +3 more
doaj   +1 more source

Limnological changes in Dom Helvécio Lake (South-East Brazil): natural and anthropogenic causes

Brazilian Journal of Biology
In order to verify changes in physical, chemical and biological features of Dom Helvécio Lake (South-East Brazil), this study compares previous and recent data obtained from limnological investigations over three decades. Plankton species composition and
PM. Maia-Barbosa, LG. Barbosa, SL. Brito, F. Garcia, CFA Barros, MBG Souza, N. Mello, AS. Guimarães, FAR Barbosa   +8 more
doaj   +1 more source

Spatial and temporal variation of Peridinium umbonatum F. Stein, 1883 (Dinophyceae) and its relationship with total phytoplankton of a shallow, oligotrophic lake in central Brazil (Lagoon Bonita, Distrito Federal) Variação especial e temporal de Peridinium umbonatum F. Stein, 1883 (Dinophyceae) e sua relação com o fitoplâncton total de uma lagoa rasa e oligotrófica no Brasil Central (Lagoa Bonita, Distrito Federal)

Acta Limnologica Brasiliensia, 2010
AIM: The main goal of this study was to investigate the temporal and spatial distribution of Peridinium umbonatum and its relationship with the physical and chemical water variables of the pelagic and littoral zones of Lagoon Bonita, located in Brasília,
Patrícia Pereira Gomes, Maria do Socorro Rodrigues Ibañez, June Springer de Freitas   +2 more
doaj   +1 more source

Seasonal Variation in Water Quality and Plankton Communities in a Eutrophic Tropical Lake (Central, India)

International Journal of Bio-Resource and Stress Management
The study was conducted during the year 2024 at Koteshwar Lake, Ramtek, Maharashtra, India to evaluate seasonal variations in water quality and plankton community structure and to determine the trophic status of the lake in relation to monsoon-driven ...
Aasidhara Darvekar, Sachin Belsare, Swapnil S. Ghatge, Vijay Raut, Shital Patil   +4 more
doaj   +1 more source

Profundal benthic invertebrates in an oligotrophic tropical lake: different strategies for coping with anoxia

Journal of Limnology, 2014
The deep benthic communities of tropical lakes are poorly understood with respect to their composition, abundance, biomass and regulatory factors. Whereas the hypolimnia of temperate oligotrophic lakes remain oxygenated, the higher temperatures in ...
María del Carmen Hernández, Javier Alcocer, Luis A. Oseguera, Elva Escobar   +3 more
doaj   +1 more source

The Lake Petén Itzá Scientifi c Drilling Project [PDF]

Scientific Drilling, 2006
Polar ice cores provide us with high-resolution records of past climate change at high latitudes on both glacial-to-interglacial and millennial timescales.
Daniel Ariztegui, Mark Brenner, Flavio S. Anselmetti, David A. Hodell   +3 more
doaj   +1 more source