The tides and tidal circulation of Todos os Santos Bay, Northeast Brazil: a general characterization

Lessa, Guilherme C.; Domínguez, José Maria Landim; Bittencourt, Achiléa Candida Lisboa; Brichta, Arno

doi:10.1590/s0001-37652001000200009

Cited by 70 publications

(53 citation statements)

References 12 publications

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“…The lowest temperatures (23.6 o C) are usually recorded in July, while the highest temperatures come in March (26.7 o C) (Macedo et al 2001). Water circulation within TSB bay is chiefly driven by tides, which are semi-diurnal with a maximum range of 2.7m (Lessa et al 2001). In its main part, salinity in the bay ranges 33.0-36.7ppm, and the temperature of the water varies 24 -…”

Section: Study Areamentioning

confidence: 99%

Subtidal benthic marine algae of the Todos os Santos Bay, Bahia State, Brazil

et al. 2008

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The Todos os Santos bay is a Brazilian coastal marine area that was appointed as top priority for biological conservation. However, there are still too few studies about the local composition of marine communities. The aim of the present investigation was to survey the diversity of marine algae in the sub-tidal zone around the reefs of the Todos os Santos bay. Samples from seven different sites in the bay were obtained by scuba diving through qualitative and quantitative methods, being the collections repeated in rainy and dry seasons. One-hundred and forty-two taxa were found: 31 Chorophyta, 27 Ochrophyta, 83 Rhodophyta, and one Macrophyte. Higher diversity and evenness indices were found during the dry season. Sargassum spp., Dictyopteris delicatula, and Halimeda opuntia were the most abundant macroalgae in the bay. Greatest number of species and most abundant samples were obtained in the oceanic region of the bay, while fewer species and less abundant samples were obtained in areas that are more exposed to the effects of human disturbance. The composition of the flora and abundance of macroalgae in each area of Todos os Santos bay seem to be determined by the quality of local seawater (i.e. degree of eutrophication). Keywords: Macroalgae, tropical bay, reef formation, eutrophication. RESUMO ALGAS MARINHAS BENTÔNICAS DO INFRALITORAL DA BAÍA DE TODOS OS SANTOS (BAHIA, BRASIL). Apesar da Baía de Todos os Santos (BTS) ser considerada uma área de extrema importânciabiológica para a conservação da zona costeira brasileira, poucos estudos sobre as comunidades marinhas de seus ecossistemas foram realizados até o momento. Neste sentido, o objetivo deste trabalho é o de caracterizar a diversidade de algas marinhas do sub-litoral das formações recifais da BTS. Dois tipos de amostragem foram realizados: uma qualitativa e outra quali-quantitativa em sete locais de coleta. Foram identificados 142 táxons, sendo 31 Chlorophyta, 27 Ochrophyta e 83 Rhodophyta, e uma fanerógama marinha. Foi observada uma tendência a maiores valores de diversidade e equitabilidade na época seca. Sargassum spp., Dictyopteris delicatula e Halimeda opuntia foram os táxons que mais contribuíram para a abundância de macroalgas na BTS. O maior número de táxons e os maiores valores de biomassa foram encontrados em local voltado para o mar aberto, enquanto que, os menores valores foram encontrados em locais com algum tipo de distúrbio antrópico. A distribuição da flora e da abundância de macroalgas da BTS é determinada pela condição de eutrofização de cada um dos locais estudados. Palavras-chave: Macroalga, baía tropical, formação recifal, eutroficação. 5.indd 2293/11/2008 15:36:18

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Section: Study Areamentioning

confidence: 99%

Subtidal benthic marine algae of the Todos os Santos Bay, Bahia State, Brazil

et al. 2008

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“…Water circulation within Todos os Santos Bay is mostly due to tidal action. The average velocity of the tidal currents in the bay is low (less than 20 cm/s), reaching a maximum of 80 cm/s during intertidal periods (Lessa et al 2001). The salinity of the surface water varies from 28 to 37 practical salinity units (PSU) in the channel between Itaparica/Salvador, and from 35 to 36.2 PSU in the central parts of the bay and Itaparica Channel (Lessa et al 2001;Celino & Queiroz 2006).…”

Section: Study Areamentioning

confidence: 99%

Polyphysaceae (Dasycladales, Chlorophyta) in Todos os Santos Bay, Bahia, Brazil

et al. 2014

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In this paper, we summarize the diversity of Polyphysaceae species in Todos os Santos Bay, in the state of Bahia, Brazil. The last has a distribution extending to the southern Atlantic Ocean. Acetabularia myriospora was transferred to Parvocaulis (as P. myriosporus) on the basis of its short corrugated peduncles and lack of a lower corona in the gametangial ray discs, which are diagnostic characters of this genus. In Todos os Santos Bay, Acetabularia species are more widely distributed than are Parvocaulis species, which are currently restricted to Itaparica Island. The most common taxa were A. caliculus and A. schenckii, which were collected from the majority of the study sites. This paper provides detailed descriptions of the morphology, reproductive aspects and geographic distributions of the algae, as well as discussing the taxa studied.

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“…1), an estuarine system with an area of ap- proximately 1100 km 2 (Lessa et al 2001). The estuarine system is ebb-dominated, as indicated by the 4 km long ebb-tidal delta, and subdivided into two distinct segments: the Itaparica Channel, and the Jaguaripe River.…”

Section: Introductionmentioning

confidence: 99%

“…The local ocean tidal range is 1.9 m during average spring conditions (Lessa et al 2001). Inside Itaparica Channel a ''tidal divide'' (meeting point for the two tidal waves approaching from the northern and southern extremes of the channel) situated about 10 km upstream from the estuary mouth ( Fig.…”

Section: Introductionmentioning

confidence: 99%

High and low frequency erosive and constructive cycles in estuarine beaches: an example from Garcez Point, Bahia/Brazil

Bittencourt

Lessa

Domínguez

et al. 2001

An. Acad. Bras. Ciênc.

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Monitoring of the morphodynamic variations of the beaches associated with an estuary contiguous with Garcez Point, Bahia, Brazil, and the superposition of aerial photographs from the region, show the presence of distinctive erosive and constructive cycles of low and high frequencies. Between 1959 and 1989, one event of shoreline erosion and progradation was recognized on the oceanic beaches just outside the estuary. Inside the estuary, an erosion phase at the southern margin coincides with a constructive phase at the other side, and vice-versa. On the southern estuarine beach, low-frequency cycles of erosion and progradation are also perceived, but with the inverse trend when compared to the contiguous oceanic beach. During the beach monitoring period (February/1991 to July/1992), the oceanic beach showed retreat rates varying from 23.7 m/year, at the channel entrance, to 1.0 m/year, three kilometers away from it. During the same period, the estuarine beach advanced at a rate of 60.3 m/year. The long-term dynamics of the shoreline position in both sides of the estuarine entrance appears to be related to the position of the channel in the ebb-tidal delta.

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The tides and tidal circulation of Todos os Santos Bay, Northeast Brazil: a general characterization

Cited by 70 publications

References 12 publications

Subtidal benthic marine algae of the Todos os Santos Bay, Bahia State, Brazil

Subtidal benthic marine algae of the Todos os Santos Bay, Bahia State, Brazil

Polyphysaceae (Dasycladales, Chlorophyta) in Todos os Santos Bay, Bahia, Brazil

High and low frequency erosive and constructive cycles in estuarine beaches: an example from Garcez Point, Bahia/Brazil

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