Encontrados 5 documentos, a visualizar página 1 de 1
Selective feeding behaviour of key free-living protists: avenues for continued ...
Montagnes, David J. S.; Barbosa, Ana B.; Boenigk, Jens; Davidson, Keith; Jurgens, Klaus; Macek, Miroslav; Parry, Jacqueline D.; Roberts, Emily C.Phagotrophic protists are diverse and abundant in aquatic and terrestrial environments, making them fundamental to the transfer of matter/energy within their respective food webs. Recognising their grazing impact is essential to evaluate the role of protists in ecosystems, and this includes appreciating prey selectivity. Efforts have been made by groups and individuals to understand selective grazing behaviour ...
Cyanobacteria blooms in natural waters in Southern Portugal: a water management...
Galvão, Helena M.; Reis, Margarida P.; Valério, Elisabete; Domingues, Rita B.; Costa, Cristina; Lourenço, Dulce; Condinho, S.; Miguel, RuteThis synthesis of 3 studies from 2 regions of southern Portugal (Alentejo and Algarve) was part of a workshop focusing on cyanobacteria held at the SAME 10. The first study monitored impacts of the large Alqueva dam on the Guadiana estuary since 1996, revealing changes in sediment load, nutrient regime and phytoplankton succession. Prior to dam construction, dense cyanobacterial blooms occurred in the upper est...
Estrutura e dinâmica da teia alimentar microbiana na Ria Formosa
Barbosa, Ana B.Tese dout., Ciências do Mar, Universidade do Algarve, 2006
Phytoplankton dynamics in a coastal saline lake (SE-Portugal)
Morais, P.; Chícharo, Alexandra; Barbosa, Ana B.The aim of this study was to characterise phytoplankton dynamics in a coastal saline lake, pinpointing putative biotic and abiotic regulatory variables of its succession and productivity. Between February and September 1998, samples for the analysis of physical, chemical and biological variables were taken fortnightly (except in February and April). The phytoplankton community showed three distinct periods of e...
Role of transient silicon limitation in the development of cyanobacteria blooms...
Rocha, Carlos; Galvão, Helena M.; Barbosa, Ana B.The Guadiana estuary, located between Portugal and Spain, has the fourth largest drainage basin of Iberian river systems. Up to 75% of the catchment area has been regulated by dams since the early 1970s. During the 1980s and 1990s, an increasing occurrence of summer cyanobacteria blooms dominated by the potentially toxic Microcystis spp. was reported. In an effort to understand the causes of recurrent noxious b...
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