Results 61 to 70 of about 238,237 (159)

Contributo para o estudo da fauna e flora da Ilha Graciosa [PDF]

open access: yes, 2005
XI Expedição Científica do Departamento de Biologia - Graciosa 2004.Como princípios da participação nesta expedição foi considerado que: Actualmente, a informação é um elemento essencial na comunicação e tomada de decisões na área da conservação da ...
Medeiros, Carlos
core  

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

open access: yesPopulation Ecology, Volume 68, Issue 1, January 2026.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva   +6 more
wiley   +1 more source

Avaliação do risco de extinção do gato-do-mato Leopardus geoffroyi (d'Orbigny & Gervais, 1844) no Brasil

open access: yesBiodiversidade Brasileira, 2013
No Brasil, Leopardus geoffroyi tem ocorrência restrita à região de influência dos Pampas no Rio Grande do Sul. A estimativa do tamanho populacional efetivo no país é de cerca de 4.000 indivíduos.
Lílian Bonjorne de Almeida   +3 more
doaj   +3 more sources

Monitorização óptica da evolução de deformações em edifícios históricos [PDF]

open access: yes, 2008
As estruturas de património arquitectónico apresentam, pela sua natureza e história, um elevado desafio no campo da conservação. Para vencer esse desafio é indispensável combinar o conhecimento e experiência científico e cultural para o estudo ...
André, P.   +5 more
core  

Habitat Structure Shapes Mollusc Assemblages in an Urban Semiarid River: Implications for Conservation and Public Health

open access: yesAquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 1, January 2026.
ABSTRACT Fine‐scale environmental drivers shape freshwater mollusc assemblages in urban semiarid rivers. We examined how substrate composition and water chemistry influence mollusc richness and abundance along a polluted stretch of a river in the Brazilian semiarid region. Surveys at five sites recorded 2479 individuals.
Lucas Ariel Sousa Aguiar   +4 more
wiley   +1 more source

Geoconservation in Portugal : an introduction [PDF]

open access: yes, 2010
A geoconservação, correspondendo a uma nova área de especialidade das Geociências, compreende os aspectos teóricos e aplicados relacionados com a identificação, avaliação, conservação e gestão de elementos da geodiversidade de excepcional valor.
Brilha, J. B.   +1 more
core  

Demographic Parameters of Iberian Killer Whales Between 2011 and 2023

open access: yesMarine Mammal Science, Volume 42, Issue 1, January 2026.
ABSTRACT The Iberian killer whale subpopulation was assessed as critically endangered (CR) by the IUCN red list of threatened species based on the available information until 2011 on its low abundance, high newborn mortality, and dependency on the endangered Atlantic bluefin tuna.
Ruth Esteban   +32 more
wiley   +1 more source

Caracterização do perfil da participação nas actividades dos desportos de natureza em Portugal [PDF]

open access: yes, 2015
Suplemento: I International Congress of Physical ActivityOs Desportos de Natureza são um conjunto de actividades desenvolvidas em contacto directo com a Natureza (Bessy & Mouton, 2004), que inclui actividades aéreas (parapente, asa delta, etc ...
Gomes, Rui, Melo, Ricardo
core   +4 more sources

Do culturable seed endophyte communities differ between native and invasive Fabaceae sharing the same habitat?

open access: yesPlant Biology, Volume 28, Issue 1, Page 249-260, January 2026.
Invasive Acacia seeds harbour richer and more functionally diverse endophyte communities than co‐occurring native Fabaceae, which could enhance establishment and invasion success of Acacia. Abstract Invasive plant species threaten ecosystems by decreasing biodiversity and altering their functioning.
J. G. Jesus   +3 more
wiley   +1 more source

Microclimate refugia shape microclimatic niches and predict individual variability in post‐breeding migration in a partially migratory species

open access: yesJournal of Animal Ecology, Volume 94, Issue 12, Page 2527-2541, December 2025.
The niche is characterized along a gradient of temperature and microclimate refugia. Individuals in breeding areas with low microclimate refugia availability are more likely to cover larger distances to post‐breeding areas, increasing exposure to risks.
Rita F. Ramos   +4 more
wiley   +1 more source

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