Burrow-Zone Distribution of the Supralittoral Amphipod Talitrus saltator on Derbyhaven Beach, Isle of Man: A Possible Mechanism for Regulating Desiccation Stress?

Williams, John A.

doi:10.2307/1548768

Cited by 53 publications

(33 citation statements)

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“…Jensen's Inequality Theory states that high thermal fluctuation will induce lower thermal sensitivity and behavioural thermoregulation (Ruel and Ayres 1999;Fischer and Karl 2010). In nature, sandhoppers burrow into the top 10 cm of sand to avoid heat and desiccation during the day, burrowing deeper in summer than in winter (Tsubokura et al 1997), and emerge to migrate across the shore during the night (Williams 1995;Morritt 1998). Such behavioural thermoregulation was not possible in our experiments, and we recognise that this potentially represents a limitation to our interpretation of natural responses.…”

Section: Discussionmentioning

confidence: 83%

Contrasting environments shape thermal physiology across the spatial range of the sandhopper Talorchestia capensis

et al. 2015

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Integrating thermal physiology and species range extent can contribute to a better understanding of the likely effects of climate change on natural populations. Generally, broadly distributed species show variation in thermal physiology between populations. Within their distributional ranges, populations at the edges are assumed to experience more challenging environments than central populations (fundamental niche breadth hypothesis). We have investigated differences in thermal tolerance and thermal sensitivity under increasing/decreasing temperatures among geographically separated populations of the sandhopper Talorchestia capensis along the South African coasts. We tested whether the thermal tolerance and thermal sensitivity of T. capensis differ between central and marginal populations using a non-parametric constraint space analysis. We linked thermal sensitivity to environmental history by using historical climatic data to evaluate whether individual responses to temperature could be related to natural long-term fluctuations in air temperatures. Our results demonstrate that there were significant differences in the thermal response of T. capensis populations to both increasing/decreasing temperatures. Thermal sensitivity (for increasing temperatures only) was negatively related to temperature variability and positively related to temperature predictability. Two different models fitted the geographical distribution of thermal sensitivity and thermal tolerance. Our results confirm that widespread species show differences in physiology among populations by providing evidence of contrasting thermal responses in individuals subject to different environmental conditions at the limits of the species' spatial range. When considering the complex interactions between individual physiology and species ranges, it is not sufficient to consider mean environmental temperatures, or even temperature variability; the predictability of that variability may be critical.

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Section: Discussionmentioning

confidence: 83%

Contrasting environments shape thermal physiology across the spatial range of the sandhopper Talorchestia capensis

et al. 2015

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“…The correlation between juveniles and sediment moisture was not surprising, since smaller individuals generally lost water more rapidly than larger ones. Williams (1995), Tsubokura et al (1997) and Fallaci et al (2003) reported that juveniles occurred lower down on the shore, compared to the adults during the entire year and also in closer association with fresh wrack deposits. The reduction in the population density, during winter months was probably a response to the environmental constraints that might determine their migration and the displacement from the burrow zone into deeper layers where they found stable conditions.…”

Section: Discussionmentioning

confidence: 95%

“…Several explanations were proposed about the zonation patterns of different amphipods: age of animals, climatic conditions, sex of the individuals (Fallaci et al, 2003). Seasonal variations in zonation pattern across the beach have been described in a number of talitrids such as Talorchestia quoyana (Marsden, 1991) T. capensis (van Senus and Mc Lachlan, 1986), T. brito (Gonçalves et al, 2003), Talitrus saltator (Williams 1995) Trinorchestia trinitatis (Tsubokura et al, 1997). These indicated that the talitrids tended to reduce the influence of unsuitable conditions, such as extreme temperature and desiccation by changing their horizontal distribution patterns.…”

Section: Discussionmentioning

confidence: 99%

Life history of Talorchestia deshayesii (Amphipoda, Talitridae) in the Ionian sandy beach (southern Italy)

Prato¹,

Trono²,

Biandolino³

2009

Braz. arch. biol. technol.

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“…On the Isle of Man, densities of T. saltator were estimated at 80 to 400 ind. m −2 (Williams, 1995). Marsden (1991) and Cardoso and Veloso (1996) showed that fluctuations in population density were frequent in talitrids and indicated periods of intense reproduction.…”

Section: )mentioning

confidence: 98%

Biodiversity of Talitridae family (Crustacea, Amphipoda) in some Tunisian coastal lagoons

et al. 2015

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Background: Although wetlands were remarkable habitats with their fauna and flora diversity, few studies have been devoted to the study of amphipod distribution in this type of environment. To study both qualitatively and quantitatively amphipod community, surveys were conducted during the spring season in ten coastal lagoons ranging from subhumid to arid bioclimatic stage. At each station, eight quadrats of 50 × 50 cm were randomly placed. Amphipods were preserved in alcohol 70°C. In the laboratory, the specimens collected were identified and counted. Meanwhile, analyses of organic matter, particle size, and heavy metals from the soil taken from each station were made. Results: A total of 1,340 specimens of amphipods were collected, and eight species belonging to Talitridae family were identified. Species richness ranges from one species collected in the supralittoral zone of El Bcherliya (Ghar El Melh lagoon) and eight species in the supralittoral zone of Bizerte lagoon. In this last station, the relative abundance of amphipods was significantly higher (36.04%, N = 483). In addition, the diversity indices of Simpson, Shannon-Weaver, and equitability shows that the highest species diversity characterizes this same station while the community was more balanced in opposite El Boughaz (Ghar El Melh lagoon) (J″ = 0.996). Conclusions: The spatial distribution of different amphipod species depends on edaphic (heavy metals, granulometry, organic matter) and climatic (temperature, humidity) factors.

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Burrow-Zone Distribution of the Supralittoral Amphipod Talitrus saltator on Derbyhaven Beach, Isle of Man: A Possible Mechanism for Regulating Desiccation Stress?

Cited by 53 publications

References 0 publications

Contrasting environments shape thermal physiology across the spatial range of the sandhopper Talorchestia capensis

Contrasting environments shape thermal physiology across the spatial range of the sandhopper Talorchestia capensis

Life history of Talorchestia deshayesii (Amphipoda, Talitridae) in the Ionian sandy beach (southern Italy)

Biodiversity of Talitridae family (Crustacea, Amphipoda) in some Tunisian coastal lagoons

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