7 Works

Data from: Spatial dynamics and mixing of bluefin tuna in the Atlantic Ocean and Mediterranean Sea revealed using next generation sequencing

Gregory Neils Puncher, Alessia Cariani, Gregory E. Maes, Jeroen Van Houdt, Koen Herten, Rita Cannas, Naiara Rodriguez-Ezpeleta, Aitor Albaina, M. Andone Estonba, Molly Lutcavage, Alex Hanke, Jay Rooker, James S. Franks, Joseph M. Quattro, Gualtiero Basilone, Igaratza Fraile, Urtzi Laconcha, Nicolas Goñi, Ai Kimoto, A. David Macías, Francisco Alemany, Simeon Deguara, Salem W. Zgozi, Fulvio Garibaldi, Isik K. Oray … & Fausto Tinti
The Atlantic bluefin tuna is a highly migratory species emblematic of the challenges associated with shared fisheries management. In an effort to resolve the species’ stock dynamics, a genome-wide search for spatially informative single nucleotide polymorphisms (SNPs) was undertaken, by way of sequencing reduced representation libraries. An allele frequency approach to SNP discovery was used, combining the data of 555 larvae and young-of-the-year (LYOY) into pools representing major geographical areas and mapping against a newly...

Data from: The curious case of Hermodice carunculata (Annelida: Amphinomidae): evidence for genetic homogeneity throughout the Atlantic Ocean and adjacent basins

Joseph B. Ahrens, Elizabeth Borda, Rômulo Barroso, Paulo C. Paiva, Alexandra M. Campbell, Alexander Wolf, Maggy M. Nugues, Greg W. Rouse & Anja Schulze
Over the last few decades, advances in molecular techniques have led to the detection of strong geographic population structure and cryptic speciation in many benthic marine taxa, even those with long-lived pelagic larval stages. Polychaete annelids, in particular, generally show a high degree of population divergence, especially in mitochondrial genes. Rarely have molecular studies confirmed the presence of ‘cosmopolitan’ species. The amphinomid polychaete Hermodice carunculata was long considered the sole species within its genus, with...

Natal origin of Pacific bluefin tuna from the California current large marine ecosystem

R.J. David Wells, John Mohan, Heidi Dewar, Jay Rooker, Yosuke Tanaka, Owyn Snodgrass, Suzanne Kohin, Nathan Miller & Seiji Ohshimo
Natal origin of subadult (age-1) Pacific bluefin tuna (PBT, Thunnus orientalis) from the California Current Large Marine Ecosystem (CCLME) was determined using natural tracers in ear stones (otoliths). Age-0 PBT collected from the two known spawning areas in the western Pacific Ocean (East China Sea, Sea of Japan) were used to establish baseline signatures from otolith cores over four years (2014-2017) based on a suite of trace elements (Li, Mg, Mn, Sr, Zn, and Ba)....

Data from: Everything is not everywhere: marine compartments shape phytoplankton assemblages

Sofie Spatharis, Vasiliki Lamprinou, Alexandra Meziti, Konstantinos Kormas, Daniel Danielidis, Evangelia Smeti, Daniel Roelke, Rebecca Mancy & George Tsirtsis
The idea that “everything is everywhere, but the environment selects” has been seminal in microbial biogeography, and marine phytoplankton is one of the prototypical groups used to illustrate this. The typical argument has been that phytoplankton is ubiquitous, but that distinct assemblages form under environmental selection. It is well established that phytoplankton assemblages vary considerably between coastal ecosystems. However, the relative roles of compartmentalisation of regional seas and site-specific environmental conditions in shaping assemblage structures,...

Reevaluating claims of ecological speciation in Halichoeres bivittatus

Dan Warren, Ron Eytan, Alex Dornburg, Teresa Iglesias, Matt Brandley, Peter Wainwright, Dan L. Warren, Ron I. Eytan, Teresa L. Iglesias, Matthew C. Brandley & Peter C. Wainwright
Allopatry has traditionally been viewed as the primary driver of speciation in marine taxa, but the geography of the marine environment and the larval dispersal capabilities of many marine organisms render this view somewhat questionable. In marine fishes, one of the earliest and most highly cited empirical examples of ecological speciation with gene flow is the slippery dick wrasse, Halichoeres bivittatus. Evidence for this cryptic or incipient speciation event was primarily in the form of...

Data from: Description of a soft-bodied invertebrate with microcomputed tomography and revision of the genus Chtonobdella (Hirudinea: Haemadipsidae)

Michael Tessler, Amalie Barrio, Elizabeth Borda, Rebecca Rood-Goldman, Morgan Hill & Mark E. Siddall
Two-jawed (duognathous) terrestrial leeches in the Haemadipsidae are major pests across their wide geographic range, represented by numerous endemic species in Australia and across many islands in the Indian and Pacific Oceans. However, haemadipsid taxonomy, based largely on externally visible characters, remains in conflict with phylogenetic relationships. We capitalize on the power of microcomputed tomography (μCT), allowing for the first description of an extant soft-bodied species – Chtonobdella tanae sp. n. – using this technology....

Desiccation amelioration and climate risk on rocky shores

Laura Jurgens
A large fraction of global biodiversity resides within biogenic habitats that ameliorate physical stresses. In most cases, details of how physical conditions within facilitative habitats respond to external climate forcing remain unknown, hampering climate change predictions for many of the world’s species. Using intertidal mussel beds as a model system, we characterize relationships among external climate conditions and within-microhabitat heat and desiccation conditions. We use these data, along with physiological tolerances of two common inhabitant...

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