Differences in Behavioural Strategies between Two Sympatric Talitrids (Amphipoda) Inhabiting an Exposed Sandy Beach of the French Atlantic Coast

Fallaci, M.; Aloia, A.; Audoglio, M.; Colombini, I.; Scapini, Felicita; Chelazzi, L.

doi:10.1006/ecss.1998.0437

Cited by 71 publications

(43 citation statements)

References 19 publications

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“…to its diet. Our results emphasize therefore the intertidal affinity and limited foraging habitat of this amphipod species, which was also recognised by Fallaci et al (1999).…”

Section: Discussionsupporting

confidence: 79%

Niche segregation amongst sympatric species at exposed sandy shores with contrasting wrack availabilities illustrated by stable isotopic analysis

Bessa

Baeta

Marques

2014

Ecological Indicators

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a b s t r a c tWrack supplies (macroalgae, seagrasses and carrion) are a common feature of sandy beaches worldwide. These allochthonous inputs are a potential high-quality food subsidy for beach fauna, but little is known about the feeding ecology and niche segregation strategies of these species in beaches with limited wrack availabilities. We used stable isotopic ratios of nitrogen and carbon to examine the diets and niche segregation among three sympatric crustaceans, the amphipods Talitrus saltator and Talorchestia brito, and the isopod Tylos europaeus, in two temperate beaches, Cabedelo and Quiaios, on the Portuguese Atlantic coast, with contrasting wrack availabilities, over winter and summer. In the beach with limited wrack (Quiaios), consumers showed significantly different interspecific and temporal isotopic signatures, suggesting a distinct foraging habitat and niche differentiation. Mixing models outputs (SIAR) revealed in this case a seasonal shift in the diet of consumers from terrestrial sources in winter towards marinebased sources (phytoplankton) in the summer. In contrast, at Cabedelo, consumers showed clear overlap in isotopic signatures, with similar contributions of the available wrack to their diets. As a whole, an opportunistic and generalist feeding behaviour was described for these species, namely for T. saltator. Isotopic profiles support the occurrence of spatial overlap during summer but different foraging strategies of the three species in these beaches during winter. Our results show that on temperate beaches with ephemeral wrack supplies, consumers might need to adopt different foraging strategies and niche segregation for their subsistence, and additionally illustrate the viability of using stable isotopes to capture subtle changes in trophic niches.

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“…to its diet. Our results emphasize therefore the intertidal affinity and limited foraging habitat of this amphipod species, which was also recognised by Fallaci et al (1999).…”

Section: Discussionsupporting

confidence: 79%

Niche segregation amongst sympatric species at exposed sandy shores with contrasting wrack availabilities illustrated by stable isotopic analysis

Bessa

Baeta

Marques

2014

Ecological Indicators

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“…Algumas características biológicas, como baixa tolerância a imersão, sensibilidade a dessecação e às atividades de recreação, turismo e urbanização da orla, tornam os talitrídeos interessantes para o monitoramento de mudanças ambientais, tanto de origem humana quanto natural (Moore & Francis, 1985; caPítulo 18 Foto: Ricardo S. Cardoso Fallaci, et al, 1999). Assim, esses anfípodas têm sido apontados como bons indicadores de impactos, chegando inclusive a desaparecer de áreas impactadas (Weslawski et al, 2000;Nardi et al, 2003;Ugolini et al, 2004;Fanini et al, 2005;Veloso et al, 2008;.…”

Section: Introductionunclassified

“…Geralmente, as espécies associadas ao detrito vegetal estão localizadas na região superior do entremarés e no supralitoral, formando densas agregações embaixo das manchas de algas. Contudo, a maioria das espécies migra verticalmente ao longo da praia à procura de alimento (Fallaci et al, 1999, Dugan et al, 2003 e, dependendo das condições climáticas, podem se deslocar para a região de dunas.…”

Section: Introductionunclassified

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos

Turra¹,

Denadai²

2015

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“…Dentre os organismos que ocupam a região superior da praia, os crustáceos talitrídeos são os mais estudados (Fallaci et al, 1999;Cardoso, 2002;Rosa, et al, 2007). Esta região é caracterizada por permanecer seca a maior parte do tempo e, apresentar uma faixa de detritos composta por matéria orgânica de origem terrestre ou marinha, depositados pela ação de ondas e marés, conhecida como "linha de deriva" ou "linha de detrito".…”

Section: Introductionunclassified

Ocorrência de três espécies do gênero Bledius Leach, 1819 (Coleoptera, Staphylinidae, Oxytelinae) nas praias arenosas expostas do Paraná, Brasil.

Martins¹,

Borzone²,

Rosa³

et al. 2010

Braz. J. Aquat. Sci. Technol.

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The upper portions of sandy beaches usually have a strip of debris deposited by the action of waves and tides known as "drift line" or "stranded wrack". This deposit is inhabited by amphipods Talitridae and insects, particularly beetles of the family Staphylinidae. For their sensitive to environmental variations, these beetles can be considered important bio-indicators of sandy beach ecosystem health. In the southern coast of Brazil three species of the genus Bledius Leach, 1819 were reported: Bledius bonariensis, B. fernandezi and B. hermani. The present work analyses the relationship between sandy beach sedimentological and morphodynamic characteristics and the occurrence pattern of Bledius species from data obtained on a preliminary survey on 12 sandy beaches of Paraná state. B. hermani was the most abundant and frequent species, present in ten of the 12 beaches studied. B. fernandezi showed a positive correlation with morphodynamics and sedimentological characteristics. Furthermore, B. hermani was dominant on beaches with coarse sand and more reflective to intermediate morphodynamic. B. bonariensis showed higher densities at beaches with dissipative characteristics near the mouth of Paranaguá Bay. The highest densities of Bledius were recorded on inhabited Superagüi beaches, located in a national park. This suggests that the group could be affected by human interference, particularly urbanization.

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Differences in Behavioural Strategies between Two Sympatric Talitrids (Amphipoda) Inhabiting an Exposed Sandy Beach of the French Atlantic Coast

Cited by 71 publications

References 19 publications

Niche segregation amongst sympatric species at exposed sandy shores with contrasting wrack availabilities illustrated by stable isotopic analysis

Niche segregation amongst sympatric species at exposed sandy shores with contrasting wrack availabilities illustrated by stable isotopic analysis

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos

Ocorrência de três espécies do gênero Bledius Leach, 1819 (Coleoptera, Staphylinidae, Oxytelinae) nas praias arenosas expostas do Paraná, Brasil.

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