Seasonal heterogeneity of ocean warming: a mortality sink for ectotherm colonizers

Maffucci, Fulvio; Corrado, Raffaele; Palatella, Luigi; Borra, Marco; Marullo, Salvatore; Hochscheid, Sandra; Lacorata, Guglielmo; Iudicone, Daniele

doi:10.1038/srep23983

Cited by 44 publications

(55 citation statements)

References 43 publications

(49 reference statements)

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“…Moreover, the south Tyrrhenian triangle is a passageway not only into the Tyrrhenian Sea itself but also between the Western and the Eastern Mediterranean, connecting the 2 basins through the Strait of Sicily. Several satellite tracking studies have documented this (Bentivegna 2002, Eckert et al 2008, Luschi et al 2013, as have numerical simulations of particle distribution that highlight exchange of turtles drifting passively between the 2 basins (Casale & Mariani 2014, Maffucci et al 2016.…”

Section: Sea Turtle Distributionmentioning

confidence: 92%

Turtles on the trash track: loggerhead turtles exposed to floating plastic in the Mediterranean Sea

Arcangeli¹,

Maffucci²,

Atzori³

et al. 2019

Endang. Species. Res.

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Loggerhead turtles Caretta caretta spend most of their life in large marine areas occupying a variety of habitats where they are exposed to different types of threats. Among these, marine litter poses a risk of entanglement or ingestion. Areas of risk exposure can be identified where the species overlap with litter accumulations, but gathering data on this highly mobile species and marine litter, especially in high sea areas, is challenging. Here we analysed 5 years of sea turtle and marine litter data collected by a network of research bodies along fixed trans-border transects in the Mediterranean Sea. Ferries were used as observation platforms to gather systematic data on a seasonal basis using standard protocols. Loggerhead turtle sightings over time and space were compared in terms of sightings per unit effort, and risk-exposure areas were assessed based on seasonal overlap of species hot spots and high-density plastic areas revealed by kernel analysis. In almost 180 000 km surveyed, 1258 sea turtles were recorded, concentrated mostly in the central Adriatic Sea and Sardinia-Sicilian channels during all seasons, and in the central Tyrrhenian Sea during spring. Plastic comprised the highest fraction of litter items detected. Several areas of higher risk exposure, both permanent and seasonal, were identified, mainly in the Adriatic Sea and during the spring−summer seasons. Records of both species and floating litter were highly variable, underlying the need for continuous long-term monitoring to develop sound conservation and management measures, especially in the identified areas of risk exposure.

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Section: Sea Turtle Distributionmentioning

confidence: 92%

Turtles on the trash track: loggerhead turtles exposed to floating plastic in the Mediterranean Sea

Arcangeli¹,

Maffucci²,

Atzori³

et al. 2019

Endang. Species. Res.

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“…Limited exchange between the 2 basins has been estimated for hatchlings and post-hatchlings originating in the western Mediterranean. These are mostly retained in the South Tyrrhenian Sea, with dispersion to the north-western part (Maffucci et al 2016). Notably, it appears that the western Mediterranean is unsuitable as a nursery area under current climatic conditions, as post-hatchlings are unlikely to survive the colder winter temperatures in this basin (Maffucci et al 2016).…”

Section: Nursery Areasmentioning

confidence: 98%

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Casale¹,

Broderick²,

Camiñas³

et al. 2018

Endang. Species. Res.

179

227

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The available information regarding the 2 sea turtle species breeding in the Mediterranean (loggerhead turtle Caretta caretta and green turtle Chelonia mydas) is reviewed, including biometrics and morphology, identification of breeding and foraging areas, ecology and behaviour, abundance and trends, population structure and dynamics, anthropogenic threats and conservation measures. Although a large body of knowledge has been generated, research efforts have been inconsistently allocated across geographic areas, species and topics. Significant gaps still exist, ranging from the most fundamental aspects, such as the distribution of major nesting sites and the total number of clutches laid annually in the region, to more specific topics like age at maturity, survival rates and behavioural ecology, especially for certain areas (e.g. southeastern Mediterranean). These gaps are particularly marked for the green turtle. The recent positive trends of nest counts at some nesting sites may be the result of the cessation of past exploitation and decades of conservation measures on land, both in the form of national regulations and of continued active protection of clutches. Therefore, the current status should be considered as dependent on such ongoing conservation efforts. Mitigation of incidental catch in fisheries, the main anthropogenic threat at sea, is still in its infancy. From the analysis of the present status a comprehensive list of re search and conservation priorities is proposed.

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“…In recent decades, however, substantial range expansions have become increasingly frequent as a result of anthropogenic changes to the climate and landscape (Prugh et al 2009;Chen et al 2011). For example, barred owls (Livezey 2009), northern flying squirrels (Garroway et al 2011), as well as several species of sea turtle (Pike 2013;Maffucci et al 2016), have all undergone contemporary range expansions that are at least partially attributed to climate warming or additional human mediated environmental factors. However, despite the ubiquity of range expansions across taxa, empirical studies of the genetic consequences of recent expansions remain relativity rare.…”

Section: Introductionmentioning

confidence: 99%

Demographic history influences spatial patterns of genetic diversityin recently expanded coyote (Canis latrans) populations

et al. 2017

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Human-mediated range expansions have increased in recent decades and represent unique opportunities to evaluate genetic outcomes of establishing peripheral populations across broad expansion fronts. Over the past century, coyotes (Canis latrans) have undergone a pervasive range expansion and now inhabit every state in the continental United States. Coyote expansion into eastern North America was facilitated by anthropogenic landscape changes and followed two broad expansion fronts. The northern expansion extended through the Great Lakes region and southern Canada, where hybridization with remnant wolf populations was common. The southern and more recent expansion front occurred approximately 40 years later and across territory where gray wolves have been historically absent and remnant red wolves were extirpated in the 1970s. We conducted a genetic survey at 10 microsatellite loci of 482 coyotes originating from 11 eastern U.S. states to address how divergent demographic histories influence geographic patterns of genetic diversity. We found that population structure corresponded to a north-south divide, which is consistent with the two known expansion routes. Additionally, we observed extremely high genetic diversity, which is atypical of recently expanded populations and is likely the result of multiple complex demographic processes, in addition to hybridization with other Canis species. Finally, we considered the transition of allele frequencies across geographic space and suggest the mid-Atlantic states of North Carolina and Virginia as an emerging contact zone between these two distinct coyote expansion fronts.

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Seasonal heterogeneity of ocean warming: a mortality sink for ectotherm colonizers

Cited by 44 publications

References 43 publications

Turtles on the trash track: loggerhead turtles exposed to floating plastic in the Mediterranean Sea

Turtles on the trash track: loggerhead turtles exposed to floating plastic in the Mediterranean Sea

Mediterranean sea turtles: current knowledge and priorities for conservation and research

Demographic history influences spatial patterns of genetic diversityin recently expanded coyote (Canis latrans) populations

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