16 documents found, page 1 of 2
Microplastic leachates inhibit small-scale self-organization in mussel beds
Zardi, Gerardo I; Nicastro, Katy R; Truong, Stéphanie Lau; Decorse, Philippe; Nozak, Sophie; Chevillot-Biraud, Alexandre; Froneman, Pierre WilliamSelf-organized spatial patterns are increasingly recognized for their contribution to ecosystem functioning. They can improve the ecosystem's ability to respond to perturbation and thus increase its resilience to environmental stress. Plastic pollution has now emerged as major threat to aquatic and terrestrial biota. Under laboratory conditions, we tested whether plastic leachates from pellets collected in the ...
Intraspecific genetic lineages of a marine mussel show behavioural divergence w...
Cozzolino, Lorenzo; Nicastro, Katy R; Hubbard, Peter; Seuront, Laurent; McQuaid, Christopher D.; Zardi, Gerardo IWorldwide, microplastic pollution has numerous negative implications for marine biota, exacerbating the effects of other forms of global anthropogenic disturbance. Mounting evidence shows that microplastics (MPs) not only cause physical damage through their ingestion, but also act as vectors for hazardous compounds by leaching absorbed and adsorbed chemicals. Research on the effects of plastic pollution has, ho...
Enemies with benefits: parasitic endoliths protect mussels against heat stress
Zardi, Gerardo I.; Nicastro, Katy R; McQuaid, C. D.; Ng, T. P. T.; Lathlean, J.; Seuront, L.Positive and negative aspects of species interactions can be context dependant and strongly affected by environmental conditions. We tested the hypothesis that, during periods of intense heat stress, parasitic phototrophic endoliths that fatally degrade mollusc shells can benefit their mussel hosts. Endolithic infestation significantly reduced body temperatures of sun-exposed mussels and, during unusually extre...
Long-term, high frequency in situ measurements of intertidal mussel bed tempera...
Helmuth, Brian; Choi, Francis; Matzelle, Allison; Torossian, Jessica L.; Morello, Scott L.; Mislan, K. A. S.; Yamane, Lauren; Strickland, DeniseAt a proximal level, the physiological impacts of global climate change on ectothermic organisms are manifest as changes in body temperatures. Especially for plants and animals exposed to direct solar radiation, body temperatures can be substantially different from air temperatures. We deployed biomimetic sensors that approximate the thermal characteristics of intertidal mussels at 71 sites worldwide, from 1998...
Cheating the locals: invasive mussels steal and benefit from the cooling effect...
Lathlean, Justin A.; Seuront, Laurent; McQuaid, Christopher D.; Ng, Terence P. T.; Zardi, Gerardo I.; Nicastro, Katy RThe indigenous South African mussel Perna perna gapes during periods of aerial exposure to maintain aerobic respiration. This behaviour has no effect on the body temperatures of isolated individuals, but when surrounded by conspecifics, beneficial cooling effects of gaping emerge. It is uncertain, however, whether the presence of the invasive mussel Mytilus galloprovincialis limits the ability of P. perna for c...
Upwelling areas as climate change refugia for the distribution and genetic dive...
Lourenço, Carla R.; Zardi, Gerardo I.; McQuaid, Christopher D.; Serrão, Ester; Pearson, Gareth; Jacinto, Rita; Nicastro, Katy RAimGlobal climate change has profound and diverse effects on biological diversity. Identifying present-day climate refugia is an increasingly recognized strategy for the management of biodiversity loss. Such refugia are potential safe havens that enhance environmental diversity by buffering the effects of large scale change, facilitating species persistence at regional scales and conserving unique genetic diver...
Taking the heat: distinct vulnerability to thermal stress of central and threat...
Saada, Gabriel; Nicastro, Katy R; Jacinto, Rita; McQuaid, Christopher D.; Serrão, Ester; Pearson, G. A.; Zardi, Gerardo I.Aim Although many studies have reported the effects of climate change on species' distributions, most of them consider each species as a physiologically homogenous unit. However, different lineages or populations inhabiting distinct bioregions within a species' distributional range can retain unique genetic diversity that could result in distinct adaptive capacities. A recent, large, climate-correlated distribu...
Size and position (sometimes) matter: small-scale patterns of heat stress assoc...
Lathlean, Justin A.; Seuront, Laurent; McQuaid, Christopher D.; Ng, Terence P. T.; Zardi, Gerardo I.; Nicastro, Katy RHeat-related mass mortalities and local extinctions are expected to rise as the frequency, duration, and intensity of extreme heat events increase due to climate change, particularly in the case of sessile or sedentary species that cannot relocate. Little is known, however, of how biotic factors, such as the size and non-motile behaviour of individuals, contribute to small-scale variation in susceptibility to h...
Intraspecific genetic lineages of a marine mussel show behavioural divergence a...
Zardi, Gerardo I.; Nicastro, Katy R; McQuaid, C. D.; Castilho, Rita; Costa, Joana; Serrão, Ester; Pearson, G. A.Background: Intraspecific variability is seen as a central component of biodiversity. We investigated genetic differentiation, contemporary patterns of demographic connectivity and intraspecific variation of adaptive behavioural traits in two lineages of an intertidal mussel (Perna perna) across a tropical/subtropical biogeographic transition. Results: Microsatellite analyses revealed clear genetic differentiat...
Broad scale agreement between intertidal habitats and adaptive traits on a basi...
I Zardi, Gerardo; Nicastro, Katy R; Ferreira Costa, J.; Serrão, Ester; Pearson, G. A.Understanding the extent to which neutral processes and adaptive divergence shape the spatial structure of natural populations is a major goal in evolutionary biology and is especially important for the identification of significant levels of biodiversity. Our results identified replicated habitat-specific (adaptive) phenotypic divergence in the brown macroalga Fucus vesiculosus that is independent of populatio...