Ballast water transport of alien phytoplankton species to the brazilian amazon coast.

The aim of this study was to investigate the presence of alien phytoplankton species transported through ballast water of ships that docked on the Amazon coast. Phytoplankton samples were collected from 25 ships between 2012 and 2014, revealing 215 identified species, mostly comprising oceanic planktonic marine species. However, several coastal and freshwater species not yet documented on the Maranhão coast were also observed.

Understanding allochthonous marine litter in a Protected Area in the Amazon Coast.

Studies on international waste on the Amazon coast are lacking, leaving a substantial knowledge gap concerning the socioeconomic, cultural, and environmental repercussion of this issue. In this context, the objective of this study is to comprehensively characterize and trace the origins of allochthonous litter discovered on a beach situated within a Protected Area. Given this, the hypothesis of this study is that the international litters comes from vessels operating in the region.

Secondary production of Acartia tonsa Dana, 1849 and A. lilljeborgii Giesbrecht, 1889 in an Amazonian estuary (Brazil).

The dynamics of the copepods A. tonsa and A. lilljeborgii were described for the first time in the Taperaçu Estuary.

Beachgoer perceptions on health regulations of COVID-19 in two popular beaches on the Brazilian Amazon.

The sandy beaches of the Brazilian Amazon coast have enormous touristic potential and attract thousands of visitors each year, principally in July, at the beginning of the summer vacation period. In 2020, beach going was affected worldwide by the Covid-19 pandemic, but how did the pandemic affect recreational beach use on the Amazon coast in the Brazilian state of Pará? Given this, the objective of this work is to identify public perception in compliance with health safety established by authorities due to COVID-19 pandemic in two popular beaches on the Brazilian Amazon. Recreational patterns on the beaches of this region were analyzed from the user's perspective in July, through semi-structured interviews and direct observations.

Structure and temporal variation of the phytoplankton of a macrotidal beach from the Amazon coastal zone.

The present study aimed to analyze the structure and the temporal variation of the phytoplankton of Ajuruteua beach (Bragança, Pará) and to investigate the influence of environmental variables on the dynamics of this community to provide a basis about the trophic state of this environment. Biological, hydrological and hydrodynamic samplings were performed during a nyctemeral cycle in the months of November/08, March/09, June/09 and September/09. We identified 110 taxa, which were distributed among the diatoms (87.

Occurrence of Cymbasoma longispinosum Bourne, 1890 in the Curuçá River estuary.

The present work was carried out to verify the occurrence and distribution of Cymbasoma longispinosum Bourne, 1890 in a tropical Amazon estuary from North Brazil. Samplings were performed bimonthly from July/2003 to July/2004 at two different transects (Muriá and Curuçá rivers) situated along the Curuçá estuary (Pará, North Brazil). Samples were collected during neap tides via gentle (1 to 1.

Seasonal effects of wastewater to the water quality of the Caeté river estuary, Brazilian Amazon.

Bragança's socioeconomic situation is highly dependent on estuarine and marine biological resources that are influenced by tidal cycles and climatology. Field measurements (hydrological, hydrodynamic and microbiological variables) were taken in the most urbanized zone from Caeté estuary to characterise the quality of the local environment. During the dry period, the estuary was more eutrophic and presented the highest temperature (30.

Seasonal variation in the copepod community structure from a tropical Amazon estuary, Northern Brazil.

The main purpose of this study was to investigate the seasonal variation of copepod community structure during the months of July, September and November 2003 (dry season) and January, March and May 2004 (rainy season) in the Curuçá estuary, northern Brazil. Samples were collected during neap tides via gentle 200microm mesh net tows from a small powerboat. Measurements of surface water conductivity were accomplished in situ using an electronic conductivimeter and salinity was later obtained through the transformation of the conductivity values.

Use and occupation of Olinda littoral (NE, Brazil): guidelines for an integrated coastal management.

Located on the northeast Brazilian coast, Olinda is one of UNESCO's World Heritage Sites, which is economically dependent on tourism, commerce, industry, and the informal economy. Despite its environmental and socioeconomic importance, the city of Olinda (understanding the coast as part of it) has suffered several environmental and human disturbances over the last decades. This work describes the environmental and social status of Olinda's beaches and makes recommendations concerning the development of an Integrated Coastal Management Plan for this coastal zone of the Brazilian littoral.