9 documents found, page 1 of 1
Challenges for sustainable monitoring and evaluation of the EU Marine Strategy ...
Campuzano, F.; García, M.; Dabrowski, T.; Groom, S.; Ruiz-Villarreal, M.; Brotas, V.; Kaufmann, M.; Hartman, S.; Oliveira, P.; Martins, A.; Juliano, M.The European Atlantic Area in situ characterization/monitoring is challenging due to the high costs involved (24% of total EU waters for 12% of total population). The implementation of the EU Marine Strategy Framework Directive (MSFD) is complex if the objective is to extend periodic monitoring programs to offshore waters. Remote sensing and modelling have been recognised by the Copernicus Marine Service as sui...
Validation of standard and alternative satellite ocean-color chlorophyll produc...
Sá, Carolina; D'Alimonte, Davide; Brito, A.; Kajiyama, T.; Mendes, C. R.; Vitorino, J.; Oliveira, P. B.; da Silva, J. C. B.; Brotas, V.Chlorophyll a concentration (Chl) product validation off theWestern Iberian coast is here undertaken by directly comparing remote sensing data with in situ surface reference values. Both standard and recently developed alternative algorithms are considered for match-up data analysis. The investigated standard products are those produced by the MERIS (algal 1 and algal 2) and MODIS (OC3M) algorithms. The alterna...
Effects of ultraviolet radiation and CO2 increase on winter phytoplankton assem...
Domingues, Rita B.; Guerra, Cátia C.; Barbosa, Ana B.; Brotas, V.; Galvão, Helena M.Increases in ultraviolet radiation (UVR) and CO2 affect phytoplankton growth and mortality in a variety of different ways. However, in situ responses of natural phytoplankton communities to climate change, as well as its effects on phytoplankton annual cycles, are still largely unknown. Although temperature and UVR have been increasing in temperate latitudes during winter, this season is still particularly negl...
Variation of phytoplankton assemblages along the Mozambique coast as revealed b...
Sá, C.; Leal, M. C.; Silva, A.; Nordez, S.; André, E.; Paula, J.; Brotas, V.This study is an integrated overview of pigment and microscopic analysis of phytoplankton communities throughout the Mozambican coast. Collected samples revealed notable patterns of phytoplankton occurrence and distribution, with community structure changing between regions and sample depth. Pigment data showed Delagoa Bight, Sofala Bank and Angoche as the most productive regions throughout the sampled area. In...
OCPortugal consortium: activities and challenges
Brito, Ana; Brotas, V.; Cristina, Sónia; D'Alimonte, D.; Goela, Priscila; Icely, John; Kajiyama, T.; Moore, Gerald; Newton, Alice; Sá, C.The newly-constituted Ocean Colour Portugal consortium (OCPortugal) aims at promoting the use of remote sensing (RS) products in the Atlantic off Portugal. In close collaboration with the European Space Agency (ESA), OCPortugal currently links the following institutions: Centre of Oceanography (IO), Faculty of Sciences of the University of Lisbon; CENTRIA and CITI from Faculty of Science and Technology , New Un...
Criação e implementação de um sistema de monitorização no Litoral abrangido pel...
Andrade, C.; Antunes, C.; Branquinho, C.; Marques, F.; Cabral, H; Silva, J.; Freitas, M. C.; Correia, O.; Redweik, P.; Taborda, R.; Rosa, T.; Brotas, V.O presente relatório de progresso descreve o trabalho desenvolvido pelas equipas da Fundação da Faculdade de Ciências da Universidade de Lisboa (FFCUL) e do Laboratório Nacional de Engenharia Civil (LNEC) durante o quinto semestre do projecto “Consultoria para a Criação e Implementação de um Sistema de Monitorização do Litoral Abrangido pela Área de Jurisdição da ARH do Tejo”. São descritas as acções levadas a ...
Pheophorbide a in Hydrobia ulvae faecal pellets as a measure of microphytobenth...
Coelho, H.; Cartaxana, P.; Brotas, V.; Queiroga, Henrique; Serôdio, J.The microphytobenthos (MPB) – Hydrobia ulvae trophic interaction is one of the main channels of material transfer to higher trophic levels in intertidal mudflats. A new non-invasive approach to evaluate the grazing activity of H. ulvae on microphytobenthos is proposed. The effects of season and period (combination of tide and day/night) on ingestion rates of H. ulvae (using 14Clabeled MPB) and egested pheopigme...
Modelação Ecológica do Ecossistema Planctónico da Ria de Aveiro
Rodrigues, M.; Oliveira, A.; Queiroga, H.; Brotas, V.; Fortunato, A. B.; Zhang, Y.Os modelos numéricos, devidamente validados com dados, constituem uma ferramenta atractiva para o apoio à gestão da qualidade da água e do bom estado ecológico em estuários e zonas costeiras. Com este propósito desenvolveu-se um modelo acoplado hidrodinâmicoecológico tridimensional (ECO-SELFE), o qual foi aplicado e validado na Ria de Aveiro para diferentes escalas espácio-temporais. Este modelo permite simular...
Non-photochemical quenching of chlorophyll fluorescence and operation of the xa...
Serôdio, J.; Cruz, S.; Vieira, S.; Brotas, V.The induction of non-photochemical quenching of chlorophyll fluorescence (NPQ) and its relationship with the operation of the xanthophyll cycle were studied in estuarine microphytobenthos assemblages. NPQ and xanthophyll cycle operation were characterised by quantifying the induction kinetics and light-response curves of NPQ formation and of the production of xanthophyll cyle pigments diadinoxanthin (DD) and di...