Bivalve mollusk assemblages on São Paulo's northern continental shelf, southeast Brazil

Soares-Gomes, Abı́lio; Pires-Vanin, Ana Maria Setúbal

doi:10.1590/s1519-69842005000400019

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…With regard the Deep Zone, with the constant input of SACW nutrients, temporal stability is greater and the species present high density and biomass. The same result has been obtained for mollusks PIRES-VANIN, 2005) and for polychaetes (PAIVA, 1993) in northern areas of the southwestern Atlantic shelf. The higher biomass of amphipods found in the Deep Zone may be due to the temperature-dependent life histories of the species, because their growth and molting rates appear to be decoupled, resulting in small adults at warm temperatures (e.g.…”

Section: Discussionsupporting

confidence: 78%

“…There have been reports of the ecological influence of water mass dynamics on the benthic fauna of the southeastern Brazilian shelf (PIRES-VANIN, 1992;PIRES-VANIN, 2004;PIRES-VANIN, 2005), but the available data do not take the role of the estuarine system on the shelf into consideration. The main objective of the present study was, therefore, to examine the changes in diversity, density and life style of the amphipod community of the shelf adjacent to Santos Bay in the attempt to understand the environmental gradient addressed by the coastward SACW intrusion combined with the influence of the oceanward estuarine waters on superficial sediment communities.…”

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal and functional structure of the amphipod communities off Santos, Southwestern Atlantic

Rodrigues

Pires-Vanin

2012

Braz. j. oceanogr.

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A B S T R A C TThe amphipod fauna was employed to investigate a bottom environmental gradient in the continental shelf adjacent to Santos Bay. The constant flow of less saline water from the estuarine complex of the Santos and São Vicente rivers besides the seasonal intrusion of the cold saline South Atlantic Central Water (SACW) bring a highly dynamic water regime to the area. Density, distribution, diversity and functional structure of the communities were studied on a depth gradient from 10 to 100 m on two cruises in contrasting seasons, winter 2005 and summer 2006. Twenty-one sediment samples were taken with a 0.09m 2 box corer. Temperature and salinity were measured at each station and an additional surface sediment sample was obtained with the box corer for granulometric and chemical analyses. Sixty species were collected on each survey and higher density values were found in summer. A priori one-way Analysis of Similarities (ANOSIM) indicated the existence of three different groups of amphipods related to the depth gradient: the Coastal group, the Mixed Zone group and the Deep Zone group. The Coastal Zone in both cruises was inhabited by a community presenting low diversity and density, besides high dominance of the infaunal tube-dweller Ampelisca paria; the area around 30 m presented the highest values of all the ecological indicators and the species showed several life styles; the outer area, situated between 50 and 100 m depth in the SACW domain, presented a community characterized by lower diversity and high biomass and density values. A season-depth ANOSIM showed the influence of depth and season for the Coastal and Mixed Zone groups whereas no seasonal difference was obtained for the Deep Zone group. The synergistic effect of the SACW and depth in the first place, followed by physical changes in substrate, seem to be the main factors controlling the fauna's distribution. In addition, the estuarine waters from Santos Bay apparently had no effect on the establishment of the environmental gradient observed on the adjacent shelf. Diversity, distribution, functional groups and trophic conditions of superficial sediments are discussed in the light of the main oceanographic processes present on the southern Brazilian shelf. R E S U M OA fauna de anfípodes foi empregada para investigar o gradiente ambiental na plataforma continental adjacente a Baía de Santos. A entrada constante de uma água menos salina proveniente do complexo estuarino de Santos e São Vicente e a intrusão sazonal da água fria e salina da Água Central do Atlântico Sul (ACAS) faz com que a área seja um ambiente hidrodinamicamente instável. Densidade, distribuição, diversidade e estrutura funcional das comunidades de anfípodes foram estudadas em um gradiente de profundidade entre 10 e 100 m, em dois cruzeiros realizados em épocas contrastantes, inverno (2005) e verão (2006). Vinte e uma amostras de sedimento foram coletadas com um box corer de 0,09 m 2 . Temperatura e salinidade foram coletadas em cada estação com CTD e uma amostra adicional...

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Spatio-temporal and functional structure of the amphipod communities off Santos, Southwestern Atlantic

Rodrigues

Pires-Vanin

2012

Braz. j. oceanogr.

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“…was common in the sand zone and dominant in the transition zone [41,42]. Several bivalve species were present in the transition zone; the most important were semelids and Nucula semiornata, a typical deposit-feeder from shallow waters, found in a wide range of granulometric gradients [43,44]. The mud zone was characterized by the presence of ophiuroids and the tube-dwelling tanaid Monokalliapaseudes schubarti, a species that is associated with fine and organic-enriched sediments in the region [45,46].…”

Section: Discussionmentioning

confidence: 99%

Distribution and Sediment Selection by the Mud Shrimp Upogebia noronhensis (Crustacea: Thalassinidea) and the Potential Effects on the Associated Macroinfaunal Community

Sumida

Güth

Quintana

et al. 2020

JMSE

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Burrowers such as thalassinideans remobilize sediment in benthic ecosystems, altering granulometry, enhancing organic matter cycling and oxygenation. We characterized the distribution of the mud shrimp Upogebia noronhensis and the associated macroinfauna along a depth and granulometric gradient in a shallow subtidal area in the southern Brazilian coast. Mud shrimp densities were estimated by burrow opening count using 0.25 m2 quadrats in three sediment zones: sand, sand-mud transition and mud. Macroinfaunal community descriptors and sediment granulometric characteristics were assessed. U. noronhensis average density varied from 0.6 to 145 individuals m−2 and was highest in the transition zone and lowest in the sand zone. Macrofauna in the sand zone was at least three times more abundant and 1.2 times richer, averaging 436.3 organisms and 39 species, while the transition and mud zones were more even in species distribution (species evenness > 0.7). The shrimp presence seems to be linked to a coarse sand content <80% and clay and silt <40% in the sediment, a compromise between gallery construction ability and filter-feeding suitability. High densities and aggregated distribution of mud shrimp, combined with alteration of sediment grain composition and organic matter, are likely to affect macroinfaunal abundance nearby the burrows.

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“…Bivalvia juga memainkan peranan penting lainnya dalam ekosistem laut, yaitu mengontrol aliran material dan energi (Dame, 1996. Gosling, 2003 in Soares-Gomes and Pires-Vanin, 2005).…”

Section: Pendahuluanunclassified

LINK OF Pharella acutidens ABUNDANCE AND MANGROVE HABITAT IN CEMPI BAY, DOMPU REGENCY, WEST NUSA TENGGAR

Dermawan¹,

Setyobudiandi²,

Krisanti³

2017

J. Ilmu dan Teknologi Kelautan Tropis

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ABSTRAKKerang P. acutidens merupakan salah satu bivalvia yang habitatnya berada pada substrat ekosistem mangrove, yang merupakan salah satu sumber protein bagi masyarakat Kabupaten Dompu. Keberadaan sumberdaya kerang P. acutidens pada Teluk Cempi, Kabupaten Dompu mulai susah didapatkan karena luas lahan mangrove yang merupakan habitat bagi kerang tersebut sedikit demi sedikit berkurang akibat dari perubahan lahan menjadi kawasan tambak dan adanya aktivitas pemanfaatan kayu bakau oleh masyarakat sekitar serta pemanfaatan kerang P. acutidens yang rutin dilakukan. Variasi habitat dari kerapatan vegetasi 1.333 pohon/ha sampai 3.300 pohon/ha, luas total penutupan atau basal area dan berbagai macam spesies mangrove membuat penelitian ini menarik. Tulisan ini merupakan sebagian hasil penelitian yang menjelaskan bahwa ada pengaruh yang positif antara habitat yaitu ekosistem mangrove dan kelimpahan kerang P. acutidens, dengan melakukan analisa regresi linear sederhana. Aspek dari habitat yang diambil sebagai variabel independen adalah total penutupan jenis mangrove (∑Ci) atau basal area dan kelimpahan kerang P. acutidens sebagai variabel dependen. Hasil analisis menunjukkan bahwa terdapat hubungan positif antara total penutupan jenis mangrove dan kelimpahan kerang P. acutidens dengan persamaan y= 0,3038x + 3,8877 dan R 2 = 0,9579.

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Bivalve mollusk assemblages on São Paulo's northern continental shelf, southeast Brazil

Cited by 12 publications

References 14 publications

Spatio-temporal and functional structure of the amphipod communities off Santos, Southwestern Atlantic

Spatio-temporal and functional structure of the amphipod communities off Santos, Southwestern Atlantic

Distribution and Sediment Selection by the Mud Shrimp Upogebia noronhensis (Crustacea: Thalassinidea) and the Potential Effects on the Associated Macroinfaunal Community

LINK OF Pharella acutidens ABUNDANCE AND MANGROVE HABITAT IN CEMPI BAY, DOMPU REGENCY, WEST NUSA TENGGAR

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