Results 51 to 60 of about 1,324,789 (341)

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

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

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

Stable Isotopes Approach to Infer the Feeding Habit and Trophic Position of Freshwater Fishes in Tropical Lakes [PDF]

Iranica Journal of Energy and Environment, 2016
A study was conducted on the stable isotope variation of muscle tissues from selected freshwater fish species from Temenggor Lake and Chenderoh Lake, Perak, Malaysia from December 2014 to March 2015. The objective is to assess the stable isotopes of δ13C
S. K. Yap, I. Muneera, M. I. Syakir, H. H. Zarul, F. Widad   +4 more
doaj   +1 more source

ICDP workshop on the Lake Tanganyika Scientific Drilling Project: a late Miocene–present record of climate, rifting, and ecosystem evolution from the world's oldest tropical lake [PDF]

Scientific Drilling, 2020
The Neogene and Quaternary are characterized by enormous changes in global climate and environments, including global cooling and the establishment of northern high-latitude glaciers.
J. M. Russell, P. Barker, A. Cohen, S. Ivory, I. Kimirei, C. Lane, M. Leng, N. Maganza, M. McGlue, E. Msaky, A. Noren, L. Park Boush, W. Salzburger, C. Scholz, R. Tiedemann, S. Nuru, S. Nuru   +16 more
doaj   +1 more source

Water Quality Characteristics of a Water Hyacinth Infested Tropical Highland Lake: Lake Tana, Ethiopia

Frontiers in Water, 2022
Nutrient enrichment from increased anthropogenic activities causes algal blooms and the proliferation of water hyacinth and other aquatic weeds. It is a recent phenomenon in developing nations where the link between water quality and water hyacinth ...
Minychl G. Dersseh, T. Steenhuis, Aron A. Kibret, Bantesew M. Eneyew, Mebrahtom G. Kebedew, F. Zimale, A. Worqlul, M. Moges, W. Abebe, D. A. Mhiret, A. Melesse, S. Tilahun   +11 more
semanticscholar   +1 more source

Tropical Lakes May Emit More Methane

Eos, 2021
Fresh waters are one of the primary sources of natural methane emissions, but methane dynamics in tropical lakes are not as well understood as those in more temperate regions.
openaire   +1 more source

Rainfall variations in central Indo-Pacific over the past 2,700 y [PDF]

, 2019
Tropical rainfall variability is closely linked to meridional shifts of the Intertropical Convergence Zone (ITCZ) and zonal movements of the Walker circulation.
Breitenbach, Sebastian, Cai, Wenju, Cai, Yanjun, Chabangborn, Akkaneewut, Chawchai, Sakonvan, Cheng, Hai, Chou, Yu-Chen, Duerrast, Helmut, Edwards, R. Lawrence, Gao, Yongli, Hsu, Huang-Hsiung, Kwiecien, Ola, Löwemark, Ludvig, Partin, Judson W., Shen, Chuan-Chou, Shi, Zhengguo, Tan, Liangcheng, Wohlfarth, Barbara, Wu, Chung-Che   +18 more
core   +1 more source

Distinctive effects of allochthonous and autochthonous organic matter on CDOM spectra in a tropical lake

, 2018
. Despite the increasing understanding about differences in carbon cycling between temperate and tropical freshwater systems, our knowledge on the importance of organic matter (OM) pools on light absorption properties in tropical lakes is very scarce. We
L. P. Brandão, L. S. Brighenti, P. Staehr, E. Asmala, P. Massicotte, D. Tonetta, F. Barbosa, D. Pujoni, J. F. Bezerra-Neto   +8 more
semanticscholar   +1 more source