Results 31 to 40 of about 7,812 (175)

LA GRAN CUENCA DEL ORINOCO [PDF]

open access: yes, 1998
¿Qué es la Orinoquia? El concepto básico para identificar la región de la Orinoquia es el de cuenca hidrográfica, aguas que confluyen eh el río Orinoco.
Domínguez, Camilo
core  

High levels of Mercury and Lead detected by hair analysis in two Venezuelan environments Altos níveis de Mercúrio e Chumbo detectados pela análise de cabelo em dois ambientes venezuelanos

open access: yesActa Amazonica, 2009
Mercury and Lead concentrations obtained by ICP-OAS analysis of human hair from riverside communities along the Orinoco river in the Amazon state (Venezuela) were compared with those from Caracas, Venezuela.
Eunice Marcano   +4 more
doaj   +1 more source

Tidal River Flood Risk Highest During Intermediate Rather Than Peak River Discharge

open access: yesAGU Advances, Volume 7, Issue 3, June 2026.
Abstract Tidal rivers are defined as the tide‐influenced, salinity‐free inland reaches of estuaries. Understanding the occurrence of peak water levels (PWLs) is critical for flood risk management, yet the timing and magnitude of PWLs in tidal rivers have been little studied. We address this gap by investigating PWLs during two catastrophic floods (1954
Leicheng Guo   +12 more
wiley   +1 more source

ORINOCO CROCODILE CROCODYLUS INTERMEDIUS [PDF]

open access: yes, 1992
The Orinoco crocodile is a large, relatively long-nosed crocodile restricted to the middle and lower reaches of the Orinoco River and its tributaries in Venezuela and Colombia Although this crocodile was found in a wide variety of habitats, including ...
Ardila Robayo, María Cristina   +3 more
core  

Functional divergence drives the prevalence of low‐abundance species in bat assemblages

open access: yesFunctional Ecology, Volume 40, Issue 6, Page 1587-1602, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are structured by a few common species, while most occur at low abundance. Understanding the drivers of this widespread pattern raises fundamental questions about community assembly rules and is important for applied ecology for identifying ...
Andrés F. Ramírez‐Mejía   +3 more
wiley   +1 more source

Geographic Range and Body Size Influence Abundance Patterns in Reef Fishes

open access: yesJournal of Biogeography, Volume 53, Issue 6, June 2026.
ABSTRACT Aim Understanding how body size and geographic range size influence species abundance is central to macroecology. Here, we characterized these relationships for reef fishes, the world's most diverse vertebrate group, across global and regional scales. Location Global tropical and subtropical reefs. Time Period Current.
M. F. Maxwell   +8 more
wiley   +1 more source

Patterns of Style, Diversity, and Similarity in Middle Orinoco Rock Art Assemblages

open access: yesArts, 2019
The area encompassed by the Orinoco river basin is home to some of the largest and most diverse rock art sites in lowland South America. In this paper, we aim to formally describe the spatial distribution and stylistic attributes of rock engravings and ...
Philip Riris, José Oliver
doaj   +1 more source

Exiled From Their Own Lands: Indigenist Policies, Oil, and Colonial Plunder in 20th Century Venezuela

open access: yesThe Journal of Latin American and Caribbean Anthropology, Volume 31, Issue 2, June 2026.
ABSTRACT This article examines the historical displacement of Indigenous peoples in Venezuela, focusing on the links between indigenist policies and the exploitation of natural resources, particularly oil, throughout the 20th century. Using a combined historical and ethnographic approach, it demonstrates how the formation of the Venezuelan nation‐state
Gabriel Tardelli
wiley   +1 more source

Dispersal Across Headwaters Determines Fish Population Structure Between Interdigitating River Systems in the Guiana Shield Highlands

open access: yesEcology and Evolution, Volume 16, Issue 5, May 2026.
The genetic population structure of riverine fishes is strongly shaped by the architecture of dendritic river networks, which can shift over both contemporary and geological timescales. Such river rearrangements are rarely incorporated into models of riverscape genetics, but they can have a profound effect on fish populations, especially when formerly ...
Thomas D. Morgan   +8 more
wiley   +1 more source

Orinoco River Basin Report Card 2016

open access: yes, 2016
This report card provides a transparent, timely, and geographically detailed assessment of the Orinoco River Basin. In 2016, the report card includes eleven indicators in the categories of Biodiversity, Management & Governance, Ecosystems & ...
Fries, Alexandra   +2 more
core   +1 more source

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