Encontrados 21 documentos, a visualizar página 1 de 3
Workshop Horticultura no contexto urbano
Shahidian, Shakib; Sousa, Adélia; Ilhéu, Maria; Perdigão, JoanaA importância do crescente fenómeno de Hortas em contexto urbano e seu enquadramento social e ambiental.
Effects of land use intensification on fish assemblages in Mediterranean climat...
Matono, Paula; Sousa, Dárcio; Ilheu, MariaSouthern Portugal is experiencing a rapid change in land use due to the spread of intensive farming systems, namely olive production systems, which can cause strong negative environmental impacts and affect the ecological integrity of aquatic ecosystems. This study aimed to identify the main environmental disturbances related with olive grove intensification on Mediterranean climate streams in southern Portugal...
Efeitos do uso do solo na ecohidrologia de bacias hidrográficas
Ilhéu, Maria; Batista, Teresa; Matono, Paula; Corte-Real, João; Sampaio, ElsaA ocupação e uso do solo, desempenham um importante papel nos fenómenos das mudanças globais constituindo um importante fator que afeta a integridade dos ecossistemas terrestres e aquáticos. Muitas bacias hidrográficas de regiões Mediterrânicas e semi-áridas, caracterizadas durante séculos por sistemas de produção agrícola em extensivo de sequeiro, nas últimas décadas sofreram uma mudança bastante acelerada nos...
Fish-based groups for ecological assessment in rivers: the importance of enviro...
Matono, Paula; Bernardo, João Manuel; Ferreira, Maria Teresa; Formigo, Nuno; Raposo Almeida, Pedro; Ilhéu, MariaThe use of river-types is of practical value, serving as groups for which assessment procedures can be developed and applied. An abiotic typology was set by the Portuguese Water Agency, mainly based on 6 major morphoclimatic regions. However, to be biologically meaningful, this typology should fit the distribution patterns of the biological quality elements communities proposed in Water Framework Directive unde...
Effects of hydrological variability on fish assemblages in small Mediterranean ...
Matono, Paula; Bernardo, João Manuel; Oberdorff, Tierry; Ilhéu, MariaSmall Mediterranean streams are shaped by predictable seasonal events of flooding and drying over an annual cycle, and present a strong inter and intra-annual variation in flow regime. Native fish assemblages in these streams are adapted to this natural evironmental variability. The distinction of human-induced disturbances from the natural ones is thus a crucial step before assessing the ecological status of t...
Effects of hydrological variability on fish assemblages in small Mediterranean ...
Matono, Paula; Bernardo, João Manuel; Oberdorff, Thierry; Ilhéu, MariaSmall Mediterranean streams are shaped by predictable seasonal events of flooding and drying over an annual cycle, and present a strong inter and intra-annual variation in flow regime. Native fish assemblages in these streams are adapted to this natural environmental variability. The distinction of human-induced disturbances from the natural ones is thus a crucial step before assessing the ecological status of ...
Biotic and abiotic interactions in temporary summer pools of southern Portugal
Rosado, Joana; Morais, Manuela; Guilherme, Pedro; Ilheu, MariaIn the south of Portugal, the summer season is characterized by reduced precipitation and high air temperatures, which causes the disruption of surface flow and subsequent formation of disconnect pools that may dry out entirely. During this dry period, there is a natural decrease of water quality standards due to the lack of water, leaving temporary rivers very vulnerable. Nevertheless, the remaining pools and ...
Tipologia fluvial para Portugal Continental com base no elemento peixes.
Ilhéu, Maria; Matono, Paula; Formigo, Nuno; Ferreira, Maria Teresa; Almeida, Pedro Raposo; Cortes, Rui; Bernardo, JoãoA definição de tipos de massas de água é uma etapa fundamental do processo de avaliação ecológica preconizado pela Directiva-Quadro da Água (DQA). Só assim é viável definir situações de referência e, comparativamente, classificar o estado ecológico de cada tipo de rio. A necessidade de produzir e aplicar índices piscícolas no âmbito da implementação da DQA justificou a definição de tipos de rios com base no ele...
Desenvolvimento de um índice piscícola para os rios de Portugal Continental.
Matono, Paula; Ilhéu, Maria; Formigo, Nuno; Ferreira, Maria Teresa; Almeida, Pedro Raposo; Cortes, Rui; Bernardo, JoãoThe Water Framework Directive advocates an assessment of ecological quality of rivers based on hydromorphology and biological elements, including fish fauna. This topic has been poorly developed in Portugal, and the existing approaches are mainly based on expert knowledge and not on sensitivity analysis. This work presents the biological metrics responsive to different types of anthropogenic pressures and the b...
Microhabitat use by the white-clawed crayfish in a Tuscan stream.
Ilhéu, Maria; Benvenuto, C.; Gherardi, F.Habitat modification, pollution, overfishing, poaching, competition from nonindigenous species, and diseases have led to the extinction in Europe of many populations of indigenous crayfish. Under the rationale that any programme of reintroduction should be preceded by a thorough understanding of habitat requirements of the species of concern, we studied the microhabitat use of an Austropotamobius pallipes popul...
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