Spatial distribution of the macrozoobenthos in the Solís Grande Stream estuary (Canelones-Maldonado, Uruguay)

Muñiz, Pablo; Venturini, Natalia

doi:10.1590/s1519-69842001000300010

Cited by 33 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Species richness at intertidal stations 1 and 10 was higher than that found in other studies of Brazilian tropical estuarine systems (Corbisier, 1991), including that of the sandy-beach intertidal areas Reis et al, 2000;Denadai et al, 2001). Outer stations, both intertidally and subtidally, had a higher richness than other subtropical Brazilian soft-bottom communities (Borzone & Souza, 1997) and much higher than those of subtropical Atlantic estuaries Capitoli et al, 1978;Ieno & Bastida, 1998;Muniz & Venturini, 2001).…”

Section: Discussionmentioning

confidence: 52%

Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

et al. 2005

View full text Add to dashboard Cite

The present work describes and analyses the structure of the macrobenthic epi- and infaunal assemblage of the estuarine system of Vitória Bay, South-eastern Brazil, from January 1998 to June 1999. Replicated sampling at intertidal and subtidal levels was conducted quarterly at ten stations. Intertidal and subtidal sediment composition was characterised. Water physico-chemical parameters were measured in situ. A total of 10,695 individuals, belonging to 144 taxa, were collected. Molluscs, crustaceans and polychaetes were the most abundant groups. The bivalves Anomalocardia brasiliana, Mytella guyanensis and M. falcata were the most abundant species. Locally, significant discharges of residential and industrial wastewater resulted in high organic content in the sediment (up to 30%) and low dissolved oxygen concentration in the water (< 1mg.l-1). Near the two entrances of the bay, high hydrodynamic activity and coarse sand reduced the detrimental effects of raw and treated sewage inputs. Species richness (S), diversity (H') and total abundance (A) decreased from outer-bay stations (22 < S < 72; 1.99 < H' < 2.85; 320 < A < 1737) towards inner-bay stations (2 < S < 45; 0.59 < H' < 2.67; 2 < A < 1317), where salinity and dissolved oxygen were lowest and organic matter content highest.
O presente trabalho analisa e descreve a estrutura das associações faunísticas macrobênticas (epifauna e infauna) do sistema estuarino da Baía de Vitória, sudeste do Brasil, de Janeiro de 1998 a Junho de 1999. Amostras replicadas em níveis de entre-marés e sublitoral foram coletadas em intervalos de três meses em dez estações. Foram caracterizadas as composições dos sedimentos de entre-marés e sublitoral. Os parâmetros físico-químicos da água foram medidos in situ. Foram coletados 10.695 indivíduos, compreendendo a 144 taxa. Os grupos mais abundantes foram moluscos, crustáceos e poliquetos. As espécies mais abundantes foram os bivalves Anomalocardia brasiliana, Mytella guyanensis e M. falcata. Localmente, descargas significativas de esgoto doméstico causaram um aumento da quantidade de matéria orgânica no sedimento (até 30%) e baixa concentração de oxigênio dissolvido na água (< 1mg.l-1). Próximo às duas entradas da baía, o alto hidrodinamismo e a presença de areia grossa reduziram os efeitos deletérios dos aportes de esgotos. A riqueza (S), a diversidade (H') de espécies e a abundância total (A), decresceram das estações externas do estuário (22 < S < 72; 1.99 < H' < 2.85; 320 < A < 1737) em direção às estações internas (2 < S < 45; 0.59 < H' < 2.67; 2 < A < 1317), onde a salinidade e oxigênio dissolvido foram menores e as quantidades de matéria orgânica maiores

show abstract

Section: Discussionmentioning

confidence: 52%

Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The collection site is located in sandy/muddy riverbank with the presence of the smooth cordgrass Spartina alterniflora LOISEL (Poaceae), the spiny rush Juncus acutus LINNAEUS (Juncaceae) and the crab Neohelice granulata (DANA, 1851). The organic matter content in the sediments is high, in comparison with other studies for estuarine systems of similar latitudes (SEYS et al, 1994;IENO;BASTIDA, 1998;MUNIZ;VENTURINI, 2001). …”

Section: Description Of the Study Areascontrasting

confidence: 46%

Morphological variability in populations of the fiddler crab Leptuca uruguayensis (Nobili, 1901) (Crustacea, Decapoda, Ocypodidae) from South America

et al. 2017

View full text Add to dashboard Cite

A comparative study on size and shape of Leptuca uruguayensis was carried out between populations from Garças River, Brazil (BP), and Solís Grande River, Uruguay (UP). The size of the onset of sexual maturity was also estimated for UP. A total of 36 crabs BP and 387 crabs UP were analyzed. In the relative growth analysis, carapace width (CW) for both sexes, major cheliped length (LMC) for males and abdomen width (AW) for females were measured. The centroid size of carapace (1.40±0.19 cm BP and 1.88±0.30 cm UP) and cheliped (1.16±0.22 cm BP and 1.58±0.45 cm UP) differed significantly (p<0.001). The shape also differed significantly (p<0.001), having UP wider carapace than BP, rostrum projected forward and posterior margin positioned more anteriorly; the cheliped of UP was also wider than BP. In UP, males' CW ranged 4.28-19.5 mm and females' 2.53-16.3 mm CW; males' LMC ranged 1.79-31.60 mm and females' AW, 0.80-8.53 mm. The onset of sexual maturity of UP was estimated in 12.20 mm CW for males and 7.81 mm for females. These differences are likely related to abiotic variables acting distinctly in the two localities.

show abstract

“…The benthic community at the mouth of Pando Stream was characterized by a low species richness and by high abundance of polychaetes (mainly Heteromastus similis), which is characteristic of the estuarine areas of the South Atlantic region Capitoli et al, 1978;Ieno and Bastida, 1998;Muniz and Venturini, 2001;Danulat et al, 2002).…”

Section: Macroinfaunamentioning

confidence: 99%

Composition and intra-annual variation of the macroinfauna in the estuarine zone of the Pando Stream (Uruguay)

Passadore¹,

Giménez²,

Acuña³

2007

Braz. J. Biol.

View full text Add to dashboard Cite

We studied the temporal patterns of macroinfaunal distribution in the estuarine portion of Pando Stream, Uruguay. We found a very low number of species and a high dominance of the polychaete Heteromastus similis. There were clear seasonal patterns in abundance with almost all species peaking in autumn, coinciding with the periods of higher salinity. Minimal values were found in winter and spring when salinity was at a minimum. We suggest that the seasonal pattern is a consequence of the combined effects of recruitment, and of high osmotic stress and disturbance during the periods of freshwater discharge that are common in winter and spring.Keywords: estuarine benthos, seasonal patterns, Uruguay. Composição e variação intra-anual da macroinfauna da área estuarina do Arroio Pando (Uruguai) ResumoEstudamos os padrões temporais da distribuição da macroinfauna da área estuarina do Arroio Pando, Uruguai. Foi encontrado um baixo número de espécies e uma grande dominância do poliqueto Heteromastus similis. Houve claros padrões sazonais na abundância, com uma maior presença das espécies no outono, período este coincidente com valores de maior salinidade. Os valores mínimos foram encontrados no inverno e na primavera, quando a salinidade era mínima. Sugerimos que o padrão sazonal é conseqüência dos efeitos misturados do recrutamento, do elevado stress osmótico e dos distúrbios durante os períodos da descarga da água doce, semelhantes no inverno e na primavera.Palavras-chave: bentos estuarino, padrões sazonais, Uruguai.

show abstract

Spatial distribution of the macrozoobenthos in the Solís Grande Stream estuary (Canelones-Maldonado, Uruguay)

Cited by 33 publications

References 20 publications

Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

Morphological variability in populations of the fiddler crab Leptuca uruguayensis (Nobili, 1901) (Crustacea, Decapoda, Ocypodidae) from South America

Composition and intra-annual variation of the macroinfauna in the estuarine zone of the Pando Stream (Uruguay)

Contact Info

Product

Resources

About