Densidade e distribuição espacial do caranguejo Ocypode quadrata (Fabricius, 1787) (Crustacea, Ocypodidae) em três praias arenosas do Espírito Santo, Brasil

Araujo, Ciro Colodetti Vilar de; Rosa, Daniel de Melo; Musiello-Fernandes, Joelson

doi:10.5007/2175-7925.2008v21n4p73

Cited by 15 publications

(15 citation statements)

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“…Changes in the morphological development of talitrid amphipods (T. saltator) have been associated with human impacts. On the coast of Spain, Barca-Bravo et al (2008) observed deformities in the bilateral symmetry of amphipods that inhabited beaches affected by greater tourist pressure. Human trampling and heavy tourist use are considered the main factors responsible for the direct or indirect mortality of T. saltator, considering that these activities can alter the degree of compacting of sediments and thus interfere with the movement of the organisms and consequently with their ability to escape (UGOLINI et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

et al. 2012

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A B S T R A C TPollution, exploitation of resources, erosion and recreational activities produce the most common impacts that somehow alter the natural balance of beach ecosystems. The aim of this study was to compare the richness and abundance of the benthic macrofauna of two sectors, one non-urbanized and the other urbanized, on each of two morphodynamically different beaches. Sectors of each beach were analyzed taking into account morphodynamic, anthropogenic (recreational activities) and ecological aspects. Morphodynamically, one of the beaches presented sediment formed of fine sand with a gentle slope and morphodynamism with dissipative characteristics. The other was of sediment formed of medium sand with a steep profile and of intermediate to reflective morphodynamic characteristics. On both beaches during the summer, the urbanized sector was frequented by a greater number of users than the non-urbanized sector. On the beach with dissipative morphodynamism, negative relationships were observed between user abundance and the species Bledius bonariensis, Donax hanleyanus, Thoracophelia furcifera, Excirolana armata, Phoxocephalopsis sp. and Tholozodium rhombofrontalis. On the beach with intermediate to reflective morphodynamics, low abundances of Atlantorchestoidea brasiliensis and Excirolana braziliensis were recorded in the urbanized sector. Thus the results of this study suggest the use of certain species as indicators of human impacts on beach ecosystems. R E S U M OPoluição, exploração de recursos, erosão e atividades recreativas são os impactos mais comuns que de alguma forma alteram o equilíbrio natural do ecossistema praial. O objetivo deste trabalho foi comparar a riqueza e a abundância da macrofauna bentônica entre um setor não urbanizado e outro urbanizado de duas praias morfodinamicamente distintas. Os setores de cada praia foram analisados levando em consideração aspectos morfodinâmicos, antrópicos (atividades recreativas) e ecológicos. Morfodinamicamente, uma das praias apresentou sedimentos formados por areia fina, suave inclinação e morfodinamismo com características dissipativas. A outra praia apresentou sedimentos formados por areia média, perfil íngreme e características morfodinâmicas entre intermediárias a refletivas. Em ambas as praias, durante o verão, o setor urbanizado apresentou maior abundância de usuários do que o setor não urbanizado. Na praia com morfodinamismo dissipativo, relações negativas foram observadas entre a abundância de usuários e a dos organismos Bledius bonariensis, Donax hanleyanus, Thoracophelia furcifera, Excirolana armata, Phoxocephalopsis sp. e Tholozodium rhombofrontalis. Já na praia com morfodinamismo intermediário a refletivo, foram registradas baixas abundâncias de Atlantorchestoidea brasiliensis e Excirolana braziliensis no setor urbanizado. Assim, os resultados do presente estudo sugerem a utilização de algumas espécies como indicadores de impactos antrópicos nos ecossistemas praiais.

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Section: Discussionmentioning

confidence: 99%

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

et al. 2012

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“…La densidad de galerías de O. quadrata en las playas de la costa norte oriental fue, de forma general, menor que la encontrada por Turra et al (Araujo et al 2008), valores similares a los obtenidos en el presente estudio. En las costas de Estados Unidos se encontraron valores de densidad entre 0.005-0.014galerías/m 2 (Wolcott & Wolcott 1984), mientras Hobbs et al (2008) encontraron valores entre 0.02-0.13galerías/m 2 .…”

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“…En playas de Brasil se han documentado aspectos relacionados con la distribución espacial de O. quadrata (Turra et al 2005, Neves & Bemvenuti 2006, Rosa & Borzone 2008, Araujo et al 2008) y con la variación espacio-temporal de su abundancia, así como la influencia de los depredadores sobre la estructura poblacional de la especie (Branco et al 2010). En México, se han realizado estudios sobre su abundancia y los patrones diarios de actividad (Valero-Pacheco et al 2007).…”

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“…quadrata, al igual que otras especies de su género, se ha usado como un indicador de los disturbios ocasionados por los humanos en las playas. Las menores densidades del cangrejo fantasma se han observado en zonas afectadas por el paso constante de las personas (Blankensteyn 2006, Neves & Bemvenuti 2006, Araujo et al 2008, el tráfico de vehí-culos motorizados (Moss & McPhee 2006, Schlacher et al 2007b, la construcción de obras civiles (Barros 2001), así como el relleno artificial de playas (Peterson et al 2000).…”

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“…La mayoría de los estudios sobre la ecología de O. quadrata se han llevado a cabo en los extremos de su ámbito de distribución a excepción de los trabajos realizados por Araujo et al (2008) y por Valero-Pacheco et al (2007) en playas tropicales. A pesar que en Cuba se reconoce a O. quadrata como un organismo común en las playas (Martínez-Iglesias 2007), aún no se ha realizado ningún estudio sobre la abundancia y distribución de esta especie.…”

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Distribución espacial de Ocypode quadrata (Decapoda: Ocypodidae) en ocho playas de la zona norte oriental de Cuba

Ocaña

Vega

Córdova

2012

RBT

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Spatial distribution of Ocypode quadrata (Decapoda: Ocypodidae) in eight beaches of NorthEastern Cuba. Studies on the ecology of Ocypode quadrata have been mostly carried out in the Northern and Southern part of its distribution range. In despite that this species is common in Cuban beaches, there are no quantitative studies regarding its abundance and spatial distribution. The aim of this study was to report some aspects about the spatial variation of O. quadrata density in sandy beaches, with different levels of human influence, in the North coast of Eastern Cuba. For this, on May 2010, eight beaches with different levels of human influence were surveyed. On each beach, the number of crabs burrows were counted in 45 quadrats of 4m 2 located in three different strata (P1, P2 and P3). According to burrow opening diameter, crabs were separated into young and adults forms. To determine the existence of statistical differences in the density of crab burrows among beaches and strata, a two-way ANOVA was developed with a Scheffé-procedure post hoc test. A total of 355 burrows were counted in 360 sample units. The composition by size classes was 237 burrows for young and 118 for adults. From the total of burrows, 74% were located in P1, 20% in P2 and 6% in P3. The higher concentration of burrows was found at Jiguaní beach (0.52±0.08 burrows/m 2 ) while the lesser concentration was found at Estero Ciego beach (0.06±0.01 burrows/m 2 ). Most of the beaches did not present significant differences in the burrows density (Scheffé, p>0.05), according to ANOVA results, in despite their different human influence level. Density of individuals was significantly higher in the upper intertidal (P1) areas (Scheffé, p<0.05) with predominance of young crabs. Total density diminished in P2 and P3 strata where a predominance of adult individuals was observed. The interaction term of beach and strata evidenced that the pattern of variation among strata was not the same for all beaches. The general pattern of adults and young specimen spatial distribution in the beaches was very similar to those reported in the literature. In the present study, the first conducted in Cuban beaches, we did not find evidence of direct relationship between the level of human impact and the density of ghost crab burrows. Rev. Biol. Trop. 60 (3): 1177-1186. Epub 2012 September 01.

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Population Biology

Petracco,

Corte,

Aviz

et al. 2023

Brazilian Marine Biodiversity

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Densidade e distribuição espacial do caranguejo Ocypode quadrata (Fabricius, 1787) (Crustacea, Ocypodidae) em três praias arenosas do Espírito Santo, Brasil

Cited by 15 publications

References 10 publications

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

Distribución espacial de Ocypode quadrata (Decapoda: Ocypodidae) en ocho playas de la zona norte oriental de Cuba

Population Biology

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