Results 171 to 180 of about 5,931 (210)

Central amazonia and its fishes

Comparative Biochemistry and Physiology Part A: Physiology, 1979
Abstract 1. The Amazon river system is characterized by its great size (it drains an area of about 6.5 million km 2 ), its great depth (to 90 m or more in some places), the flat topography of its drainage basin, the annual cycles of high and low water periods, and the geological structure of the drainage area. 2. The central Amazonian ecosystem
William L. Fink, Sara V. Fink
openaire   +1 more source

Tropical Peat Accumulation in Central Amazonia

Wetlands, 2013
Amazonia has been recently included in discussions on the role of tropical peatlands in the global carbon cycle owing to extensive peatlands up to 7.5 m thick, reported from Western Amazonia (Peru). The aim of this study was to explore peat accumulation in Central Amazonia (Brazil).
Lähteenoja, Outi, Flores, Bernardo Monteiro, Nelson, Bruce Walker   +2 more
openaire   +2 more sources

Caiman hunting in Central Amazonia, Brazil

The Journal of Wildlife Management, 2016
ABSTRACTHunting caimans (Caiman spp.) with baited hooks in the Brazilian Amazon represents one of the largest illegal wildlife industries in the world. Our objective was to evaluate the effects of water level, distance from settlements, and hunting effort on caiman meat production.
Mendonça, Washington Carlos da Silva, Marioni, Boris, Thorbjarnarson, John B., Magnusson, William Ernest, Silveira, Ronis da   +4 more
openaire   +2 more sources

Some littoral anomopods (Crustacea) from Central Amazonia

Hydrobiologia, 1995
Samples collected in Central Amazonia contained 16 species of Chydoridae, 4 species of Macrothricidae and 1 species of Ilyocryptidae. A new chydorid,Celsinotum laticaudatum sp. nov. is described, clearly differing from Australian species of this genus. Variation ofAlona dentifera (Sars, 1901) is commented upon, as well as a peculiar specimen ofAlona.
Smirnov, Nikolai N., Santos-Silva, Edinaldo Nelson   +1 more
openaire   +2 more sources

Forest regeneration on abandoned clearances in central Amazonia

International Journal of Remote Sensing, 2002
A time-series of Landsat and SPOT sensor data was used to approximate the age of tropical forests regenerating on abandoned agricultural land north of Manaus, Brazil, and to estimate the period of active land use prior to abandonment. Based on field data, two distinct regeneration pathways, dominated by the pioneer genera Cecropia and Vismia ...
Lucas, Richard, Honzák, Miroslav, Amaral, Iêda Leão do, Curran, Paul J., Foody, Giles M.   +4 more
openaire   +2 more sources

Forest Fragmentation and Biodiversity in Central Amazonia

2003
Around the world, growing human populations and economic pressures are leading to widespread conversion of tropical rainforests into a mosaic of human-altered habitats and isolated remnants. The Amazon rainforest is the largest tract of undisturbed tropical forest in the world, comprising more than 30 % of the world’s rainforest area.
C. Gascon, W. F. Laurance, T. E. Lovejoy
openaire   +1 more source

Germination in four low-várzea tree species of Central Amazonia

Aquatic Botany, 2007
Trees of Central Amazonian white-water (varzea) forests are highly adapted to the annual inundations, which can last up to 7 months every year. Many trees synchronize fruit production to the period of highest water levels of the rivers, and hydrochory is especially common in species that colonize the low-lying flood-levels flooded for longer periods ...
Wittmann, Astrid Oliveira de, Piedade, Maria Teresa Fernandez, Parolin, Pia, Wittmann, Florian Karl   +3 more
openaire   +3 more sources

A growth model for secondary forest in Central Amazonia

Forest Ecology and Management, 2005
Abstract A comprehensive stand level growth model for secondary forest in the Central Amazon is presented. The model has been established for a study site in the Tapajos region for secondary forest of an age up to ca. 35 years. The Bertalanffy–Chapman–Richards equation is applied in a state space approach: a set of differential equations is fitted by
Neeff, Till, Santos, João Roberto dos
openaire   +2 more sources

Evapotranspiration of deforested areas in central and southwestern Amazonia

Theoretical and Applied Climatology, 2011
Considering the high rates of evapotranspiration of Amazonian forests, understanding the impacts of deforestation on water loss rates is important for assessing those impacts on a regional and global scale. This paper quantifies evapotranspiration rates in two different pasture sites in Amazonia and evaluates the differences between the sites.
von Randow, R.C.S., Randow, C., Hutjes, R.W.A., Tomasella, J., Kruijt, B.   +4 more
openaire   +2 more sources

Wood density in dense forest in central Amazonia, Brazil

Forest Ecology and Management, 2005
Measurements of wood density of trees in Amazonian forests are necessary to reduce uncertainties in estimates of carbon stocks and of greenhouse-gas emissions from deforestation. Based on samples from 310 trees in 186 species or morpho-species collected near Manaus, Brazil, the present study finds that commonly used wood density estimates found in ...
Nogueira, Euler Melo, Nelson, Bruce Walker, Fearnside, Philip Martin   +2 more
openaire   +2 more sources