Results 71 to 80 of about 41,039 (215)

Comparative analysis of ephemeral river ecosystem services in agricultural and natural landscapes in mediterranean environments. A practical approach to Caia River (Portugal) [PDF]

, 2019
Mediterranean landscapes present a large amount of biodiversity and ecosystems leading to their unique identity. In fact, it is increasingly acknowledged that these ecosystems provide a large range of benefits, not only for the area where they are ...
Cabezas, José, Castanho, Rui, Escorcío, Patricia, Fernández Pozo, Luis, Kaletová, Tatiana, Loures, Luís, Lousada, Sergio, Martín Gallardo, José, Naranjo Gómez, José, Pinto-Gomes, Carlos   +9 more
core  

Phylogenetic relationships of South American Alligatorids and the Caiman of Madeira River

Journal of Experimental Zoology Part A: Ecological Genetics and Physiology, 2007
AbstractWe analyzed DNA sequences of the mitochondrial cytochrome b gene (cyt b), the nuclear Recombination Activating Gene 1 (RAG1) and the myelocytomatosis oncogene (MYC) to infer the phylogenetic relationship of Caiman crocodilus and Caiman yacare, and other South American alligatorid crocodilian species.
Hrbek, Tomas, Rangel, Vasconcelos, William, Rebêlo, George Henrique, Farias, Izeni Pires   +3 more
openaire   +3 more sources

Seasonal Dynamics of Riverine Inputs in Guadeloupe (French West Indies): Insights From More Than 12 Years of Monitoring

Hydrological Processes, Volume 40, Issue 3, March 2026.
Riverine solute fluxes peak during the wet season, emphasising the role of tropical rainfall in driving nutrient delivery to the ocean. Seasonal peaks in nutrient fluxes highlight the need for longer‐term monitoring to detect potential interannual trends.
Emma Moreau, Marie Boye, Céline Dessert
wiley   +1 more source

Morphologische Entwicklung des Ucayali in Peru ohne menschliche Einflüsse [PDF]

, 2013
The Ucayali River originates in the high Andean Mountains near the city of Cusco in Peru. After about 1,600 km, it joins with the Marañón River. Both the Ucayali River and the Marañón River are sources of the Amazon.
Alvarado-Ancieta, Cesar Adolfo, Ettmer, Bernd   +1 more
core  

Characteristics of heavy metals and their evaluation in suspended sediments from Piracicaba river basin (São Paulo, Brazil) [PDF]

, 2010
Fluxes of the particulate heavy metals like chromium (Cr), copper (Cu), cobalt (Co), nickel (Ni), zinc (Zn) and lead (Pb) were determined along the Piracicaba River basin.
Mortatti, Jefferson, Probst, Jean-Luc
core   +3 more sources

Degradation and Restoration of Anthrosols in the Amazonia Under Contrasting Agricultural Practices: Evidence From the Assessment of Soil Physical Quality and Carbon and Nitrogen Stocks

Journal of Sustainable Agriculture and Environment, Volume 5, Issue 1, March 2026.
ABSTRACT This study was conducted to assess the impact of different agricultural practices on the physical quality and the carbon and nitrogen stocks of anthropogenic soils used by smallholder farmers in Central Amazonia, Brazil. Undisturbed and disturbed soil samples were collected at three depths (0–0.10 m, 0.10–0.20 m, and 0.20–0.30 m), with five ...
Heitor Marcel da Silva Ribeiro, Reginaldo Barboza da Silva, Francisca Alcivania de Melo Silva, Newton Paulo de Souza Falcão, Zigomar Menezes de Souza, Guilherme Souza Florencio, Rodrigo Batista Pinto, Rafael Duarte L'Abbate, Tiago Osório Ferreira, Diogenes L. Antille   +9 more
wiley   +1 more source

Critical Slowing Down Reveals Hydrologic Resilience Loss Across Amazon Sub‐Basins

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract The Amazon's hydroclimate exhibits basin‐scale early‐warning signals of critical slowing down (CSD), a statistical signature of declining resilience as systems approach critical transitions. We apply a multi‐metric framework to precipitation, evapotranspiration, Soil moisture (SM), and extreme streamflows, tracking rolling variance, lag‐1 ...
Germán Poveda
wiley   +1 more source

Major Reservoir Regulation Reshapes the Composition and Fate of Particulate Organic Carbon in the Yellow River

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Reservoir regulation significantly alters the export and flux of terrestrial particulate organic carbon (POC), while also modifying its composition and fate within fluvial systems. However, the effects of different regulatory regimes on riverine POC persistence and transformation remains uncertain.
Jingbo Chen, Ming Liu, Xiaolin Ren, Xinying Che, Xueshi Sun, Dejiang Fan   +5 more
wiley   +1 more source

FISHING PRODUCTION OF Pinirampus pirinampu AND Brachyplatystoma platynemum CATFISH HAS BEEN AFFECTED BY LARGE DAMS OF THE MADEIRA RIVER (BRAZILIAN AMAZON)

Boletim do Instituto de Pesca, 2020
The present work analyzed landing events of commercial fishing boats carrying two species of large catfish in 11 fishing landing sites along the Madeira River, temporally and spatially characterizing the exploitation of these species before and after ...
Igor Rechetnicow Alves SANT'ANNA, Carlos Edwar de Carvalho FREITAS, Raniere Garcez Costa SOUSA, Hélio Daniel BELTRÃO dos Anjos, Carolina Rodrigues da Costa DORIA   +4 more
doaj  

An Improved molecular tool for distinguishing monoecious and dioedious Hydrilla [PDF]

, 2004
Two biotypes of hydrilla [Hydrilla verticillata(L.f.) Royle] occur in the United States, a dioecious type centered in the southeast and a monoecious type in the central Atlantic and northeastern states.
Center, Ted D., Madeira, Paul T., Van, Thai K.   +2 more
core