Results 51 to 60 of about 209,429 (338)

Ecologia da peste bubônica [PDF]

open access: yesRevista da Sociedade Brasileira de Medicina Tropical, 1976
INTRODUCAOEste trabalho destina-se a permitir uma reavaliacao da metodologia da pesquisa sobre peste bubonica, do ponto de vista de sua ecologia.Poucas doencas infecciosas ou parasitarias receberam tanta atencao quanto a peste. Encon­tram-se referencias a ela no folclore primitivo, nas crencas e nas supersticoes da antiguidade pre-classica.
openaire   +6 more sources

AVALIAÇÃO DOS PROGRAMAS DE PÓS-GRADUAÇÃO NA ÁREA DA ECOLOGIA [PDF]

open access: yes, 2013
Os programas de Pós-Graduação da Área da Ecologia e Meio Ambiente começaram a ser implantados na década de setenta, com o objetivo de formar mestres e doutores capazes de tomar posições de liderança no ensino e pesquisa em Ecologia.
Borges, Daniele Simões   +3 more
core  

Female Starlings With Experimentally Impaired Pre‐Laying Condition Produce Smaller But Vitamin A Richer Eggs

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
We experimentally impaired the pre‐laying condition of female starlings by clipping two flight feathers per wing at the beginning of the breeding season, before egg laying. Impaired females laid the same number of eggs as control females, but smaller, and with higher levels of yolk vitamin A.
S. Casquero   +5 more
wiley   +1 more source

Aquaculture in tropical Mexican lakes and dams: achievements and perspectives [PDF]

open access: yes, 2000
Mexico, with highly diverse physiography, geology, soils and climate, is a country with a broad mosaic of aquatic ecosystems within 320 watersheds.
Carranza, Jorge, Lopez, Martin
core  

Mixing regimes in tropical high‐mountain Andean lakes

open access: yesLimnology and Oceanography, EarlyView.
Abstract Lowland tropical lakes deeper than 15 m are typically warm monomictic, but whether the regime may switch to polymixis at high elevations remains uncertain. Using a year‐long high‐frequency dataset from thermistor chains from 10 deep lakes and occasional temperature profiles from 202 lakes in Ecuador's Cajas Massif, this study examines the ...
Pablo V. Mosquera   +4 more
wiley   +1 more source

The influence of hydrological seasonality and land use and cover on the relationship between dissolved organic carbon and carbon dioxide along a karst‐draining large tropical river

open access: yesLimnology and Oceanography, EarlyView.
Abstract The partial pressure of carbon dioxide (pCO2) in rivers is influenced by carbonate weathering, soil CO2, photosynthesis, and the mineralization of dissolved organic carbon (DOC). In tropical regions, elevated temperatures intensify these processes. However, their seasonal dynamics remain poorly understood in large karst‐draining rivers.
Daniel Cuevas‐Lara   +5 more
wiley   +1 more source

Trabajo Ecologia Politica

open access: yes, 2023
1er Parcial Ecologia Politca
Tascon Claudia Marcela, Acosta Jaime
openaire   +2 more sources

Rarity of monodominance in hyperdiverse Amazonian forests. [PDF]

open access: yes, 2019
Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such "monodominant" forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence
Alonso, Alfonso   +99 more
core  

Changes in land cover drove the recent range expansion of a tropical farmland bird

open access: yesOikos, EarlyView.
Several bird species associated with agricultural landscapes in the Palearctic and in the Nearctic (i.e. farmland birds) have been experiencing severe population declines since the 1970s, mainly due to habitat loss driven by agricultural intensification.
Luana Jéssica Ferreira   +4 more
wiley   +1 more source

Ecologia Política

open access: yesEthnoscientia - Brazilian Journal of Ethnobiology and Ethnoecology, 2018
A ideia de ecologia está relacionada a um conjunto de referências sobre um determinado lugar. Ecologia, para quem vive em uma floresta, é floresta viva a respirar e a inspirar: a vida da floresta é o suporte para a materialidade e a espiritualidade da existência, da cultura e da produção/reprodução da subsistência.
openaire   +2 more sources

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