Surface activity, zonation and migrations of Talitrus saltator on a Mediterranean beach

Scapini, Felicita; Chelazzi, L.; Colombini, I.; Fallaci, M.

doi:10.1007/bf00346175

Cited by 119 publications

(78 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3 and 4, Table 6), which interacted with the other variables. This result was expected on this beach that had a well-developed dune system and is in agreement with previous findings on Mediterranean coasts (Borgioli et al, 1999b;Scapini, 2006) and on the same Leirosa beach (Bessa et al, 2013b), confirming that populations from beaches with a prominent dune rely mainly on landscape visual cues, in contrast to populations from flat beaches, which use preferentially the sun compass (Hartwick, 1976;Scapini et al, 1992). Other highly significant factors on orientation were those involved in the use of the sun compass (sun azimuth, solar time, sky cloudiness) that played its role mainly when the landscape was not visible, and the time (month) of the experiments.…”

Section: Discussionsupporting

confidence: 92%

Macrofaunal community abundance and diversity and talitrid orientation as potential indicators of ecological long-term effects of a sand-dune recovery intervention

Nourisson

Bessa

Scapini

et al. 2014

Ecological Indicators

View full text Add to dashboard Cite

a b s t r a c tIn the last decades the increasing urban development on coastal areas have produced extensive modifications on shores all over the world, making critical the active management of pressures on sandy beaches. The use of engineering solutions to counteract beach erosion has been significantly increasing; the ecological indicators used to monitor these interventions generally focus on short-and medium-term effects, while little is known on their effectiveness on long-term temporal scales. The following ecological indicators have been tested in the present study: (a) macrofaunal community abundance and diversity and (b) orientation behaviour of Talitrus saltator, a talitrid amphipod widespread on Mediterranean and European Atlantic sandy beaches. Two sites were considered on a sandy beach of the Portuguese Atlantic coast, one located in front of a natural dune and the other at about 500 m of distance, where the dune had been rebuilt between 2000 and 2008 using geotextile tubes. In 2011 and 2012, macrofauna sampling and orientation experiments on T. saltator were performed at both sites in spring and autumn; contemporaneously the main environmental variables were registered. Macrofaunal data were analysed through multivariate statistical tests, and for the orientation distributions the circular statistics were calculated and multivariate analyses for angular data were performed. Geotextiles appeared to be successful in stabilising the recovered dunes; accordingly, the diversity of the macrofaunal communities and the orientation performances of T. saltator showed no differences between the altered and control sites. Significant reductions were nevertheless observed in the artificial-dune site regarding the abundance of T. saltator and, to a lesser extent, macrofaunal densities, likely ascribable to the presence of geotextiles instead of a vegetated natural dune, preventing invertebrates to burrow into the sand. These results, complementing a more comprehensive study on these two sites, indicate the abundance of T. saltator as the best indicator to follow long-term effects of this kind of soft-engineering intervention. The use of this bioindicator may be recommended for the late phases of monitoring procedures in dune-recovery processes.

show abstract

Section: Discussionsupporting

confidence: 92%

Macrofaunal community abundance and diversity and talitrid orientation as potential indicators of ecological long-term effects of a sand-dune recovery intervention

Nourisson

Bessa

Scapini

et al. 2014

Ecological Indicators

View full text Add to dashboard Cite

show abstract

“…In fact, differences in space and time partitioning of locomotor activities over the beach surface have been reported for several species of these brooding crustaceans (e.g. Jaramillo et al, 2003;Lastra et al, 2010;Scapini et al, 1992). Understanding foraging strategies of consumers inhabiting the same system is essential to understand their trophic relationships and ecological roles.…”

Section: Introductionmentioning

confidence: 99%

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

Bessa

Baeta

Marques

2014

Ecological Indicators

View full text Add to dashboard Cite

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.

show abstract

“…Sin embargo, algunos estudios sugieren que también pueden ocurrir diferencias en los patrones de alimentación a nivel intraespecífico. Por ejemplo, Scapini et al (1992) mencionan que los requerimientos energéticos de los juveniles del anfípodo Talitrus saltator son mayores que los de sus adultos conespecíficos, lo que explicaría el mayor tiempo ocupado por los primeros en las actividades de forrajeo sobre la superficie de la playa. Similarmente, Muir (1977) registró en una playa de la costa de Sudáfrica, que la tasa de consumo de los juveniles de Talorchestia capensis (Dana) fue más del doble que la de los adultos.…”

unclassified

Macroalgas varadas sobre la superficie de una playa arenosa del sur de Chile: preferencias alimentarias y de habitat de juveniles y adultos de Orchestoidea tuberculata (Nicolet), (Amphipoda, Talitridae)

Duarte

Jaramillo

Contreras

2008

Rev. chil. hist. nat.

View full text Add to dashboard Cite

Surface activity, zonation and migrations of Talitrus saltator on a Mediterranean beach

Cited by 119 publications

References 11 publications

Macrofaunal community abundance and diversity and talitrid orientation as potential indicators of ecological long-term effects of a sand-dune recovery intervention

Macrofaunal community abundance and diversity and talitrid orientation as potential indicators of ecological long-term effects of a sand-dune recovery intervention

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

Macroalgas varadas sobre la superficie de una playa arenosa del sur de Chile: preferencias alimentarias y de habitat de juveniles y adultos de Orchestoidea tuberculata (Nicolet), (Amphipoda, Talitridae)

Contact Info

Product

Resources

About