Results 41 to 50 of about 42,726 (282)

Evaluation of fisheries management strategies using a biotic integrity index in floodplain lakes in the lower Solimões River, Amazonas, Brazil

Acta Amazonica, 2022
Fisheries is an important activity in the Amazon basin and potentially has a high impact on ichthyofauna. With the aim of achieving sustainability in fisheries of target species, protected areas were established within a fisheries management framework ...
Bruna de Souza ANDRADE, Carlos Edwar de Carvalho FREITAS, Maria Letizia PETESSE, Flávia Kelly SIQUEIRA-SOUZA   +3 more
doaj   +1 more source

Summer CO2 evasion from streams and rivers in the Kolyma River basin, north-east Siberia [PDF]

, 2013
Inland water systems are generally supersaturated in carbon dioxide (CO2) and are increasingly recognized as playing an important role in the global carbon cycle.
Alin S.R, Aufdenkampe A.K, Battin T.J, Battin T.J, Benstead J.P, Bishop K, Blaize A. Denfeld, Butman D, Cole J.J, Cole J.J, Davidson E.A, Frey K.E, Frey K.E, Holmes R.M, Holmes R.M, Hope D, Hope D, Humborg C, Jones J.B, Karen E. Frey, Kelly C.A, Kling G.W, Koprivnjak J-F, Laudon H, Mann P.J, Melack J, Millero F.J, Millero F.J, Paul J. Mann, Rasera M.F.F.L, Raymond P.A, Richey J.E, Robert M. Holmes, Semiletov I.P, Smith L.C, Stumm W, Tank S.E, Teodoru C.R, Thurman E.M, Vachon D, Vannote R.L, Vonk J.E, Wallin M, Wallin M, Weiss R.F, Welp L.R, Wickland K.P, William V. Sobczak, Zhang T, Zimov S.A, Öquist M   +50 more
core   +2 more sources

Resilient Flow Regimes in the Rio Grande—Río Bravo Basin

River Research and Applications, EarlyView.
ABSTRACT Water is essential for human development and is an indispensable resource for economic activity and a country's growth. However, current water practices, along with increasing land‐use change, climate change, and agricultural practices, have significantly altered the hydrological cycle and water availability.
Ramon Saiz‐Rodriguez, Samuel Sandoval‐Solis, Laura Garza‐Diaz, Brian D. Richter, Enrique Prunes   +4 more
wiley   +1 more source

Periphytic algal community in lentic environments of the Upper Paraná River floodplain: seasonal and spatial variation

Acta Limnologica Brasiliensia, 2018
Aim: This study aimed to evaluate the influence of seasonal variation in the hydrological regime and of limnological variables on species richness of periphytic algae in lakes of the Upper Paraná River floodplain.
Kisay Lorena Adame, Barbara Dunck, Liliana Rodrigues   +2 more
doaj   +1 more source

Review of river fisheries valuation in West and Central Africa [PDF]

, 2008
This paper provides a review of the valuation of river fisheries in West and Central Africa. It is the general perception that, compared to the biological and ecological aspects of river fisheries, this particular subject area has received relatively ...
Béné, C., Neiland, A.
core  

Collections of Hibernating Ground Beetles (Coleoptera: Carabidae) [PDF]

, 2017
(excerpt) The mild, snowless winter weather of late December 1982 and early January 1983 made it easy to obtain litter and soil samples for extraction of overwintering ground beetles.
Dunn, Gary A
core   +3 more sources

A Tool for Prioritizing Gravel Augmentation Reaches for Sediment Starved Rivers

River Research and Applications, EarlyView.
ABSTRACT Gravel augmentation is a widely used restoration technique used to improve habitat below dams, including salmonids spawning habitat. However, gravel augmentation can be cost‐prohibitive, and it is often unclear which stream segments have the highest potential to benefit spawning salmonids.
Patricia J. Wohner, Peter A. Samarin, James T. Peterson   +2 more
wiley   +1 more source

Carbon accumulation in Amazonian floodplain lakes: A significant component of Amazon budgets?

Limnology and Oceanography Letters, 2017
The Amazon floodplains cover approximately 10% of the Amazon Basin and are composed of predominantly anoxic sediments that may store large amounts of carbon. Our study combines 210Pb derived sedimentation rates from four recently analyzed sediment cores (
Luciana M. Sanders, Kathryn H. Taffs, Debra J. Stokes, Christian J. Sanders, Joseph M. Smoak, Alex Enrich‐Prast, Paul A. Macklin, Isaac R. Santos, Humberto Marotta   +8 more
doaj   +1 more source

Effect of local and regional factors on the structure of the fish communities associated with aquatic macrophyte stands in oxbow lakes on the Amazon floodplain [PDF]

Anais da Academia Brasileira de Ciências
The Amazon floodplain is home to an extremely high diversity of fish, with lakes playing an important role in the establishment of this biological richness.
RONALDO S. DA SILVA, JEAN CARLO G. ORTEGA, TIAGO RICARDO F. JACÓ, GUILHERME S. CABRAL, FABIANO CORRÊA, LUCENA R. VIRGILIO, LUCIANO F.A. MONTAG   +6 more
doaj   +1 more source

Perception of Amazonian fishers regarding environmental changes as causes of drastic events of fish mortality

Brazilian Journal of Biology, 2022
Events of catastrophic fish mortality in the lakes of the Amazonian floodplains are not uncommon. They are generally associated with thermal inversion of the water column, which is provoked by cold air masses that originate from the south of the ...
J. A. C. Pinheiro, V. V. C. Gonçalves, H. S. Pereira, T. J. P. Fraxe, J. M. Oka, F. Siqueira-Souza, C. E. C. Freitas   +6 more
doaj   +1 more source