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| Featherstone, Amy M.; Butler, Paul G.; Peharda, Melita; Chauvaud, Laurent; Thebault, Julien. |
| A crossdated, replicated, chronology of 114 years (1901-2014) was developed from internal growth increments in the shells of Glycymeris glycymeris samples collected monthly from the Bay of Brest, France. Bivalve sampling was undertaken between 2014 and 2015 using a dredge. In total 401 live specimens and 243 articulated paired valves from dead specimens were collected, of which 38 individuals were used to build the chronology. Chronology strength, assessed as the Expressed Population Signal, was above 0.7 throughout, falling below the generally accepted threshold of 0.85 before 1975 because of reduced sample depth. Significant positive correlations were identified between the shell growth and the annual averages of rainfall (1975-2008; r = 0.34) and inflow... |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00420/53103/61588.pdf |
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| Ojaveer, Henn; Galil, Bella S.; Carlton, James T.; Alleway, Heidi; Goulletquer, Philippe; Lehtiniemi, Maiju; Marchini, Agnese; Miller, Whitman; Occhipinti-ambrogi, Anna; Peharda, Melita; Ruiz, Gregory M.; Williams, Susan L.; Zaiko, Anastasija. |
| The human-mediated introduction of marine non-indigenous species is a centuries- if not millennia-old phenomenon, but was only recently acknowledged as a potent driver of change in the sea. We provide a synopsis of key historical milestones for marine bioinvasions, including timelines of (a) discovery and understanding of the invasion process, focusing on transfer mechanisms and outcomes, (b) methodologies used for detection and monitoring, (c) approaches to ecological impacts research, and (d) management and policy responses. Early (until the mid-1900s) marine bioinvasions were given little attention, and in a number of cases actively and routinely facilitated. Beginning in the second half of the 20th century, several conspicuous non-indigenous species... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56544/58253.pdf |
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| Trofimova, Tamara; Alexandroff, Stella J.; Mette, Madelyn; Tray, Elizabeth; Butler, Paul G.; Campana, Steven; Harper, Elizabeth; Johnson, Andrew L.a.; Morrongiello, John R.; Peharda, Melita; Schöne, Bernd R.; Andersson, Carin; Andrus, C. Fred T.; Black, Bryan A.; Burchell, Meghan; Carroll, Michael L.; Delong, Kristine L.; Gillanders, Bronwyn M.; Grønkjær, Peter; Killam, Daniel; Prendergast, Amy L.; Reynolds, David J.; Scourse, James D.; Shirai, Kotaro; Thébault, Julien; Trueman, Clive; De Winter, Niels. |
| Horizon scanning is an increasingly common strategy to identify key research needs and frame future agendas in science. Here, we present the results of the first such exercise for the field of sclerochronology, thereby providing an overview of persistent and emergent research questions that should be addressed by future studies. Through online correspondence following the 5th International Sclerochronology Conference in 2019, participants submitted and rated questions that addressed either knowledge gaps or promising applications of sclerochronology. An initial list of 130 questions was compiled based on contributions of conference attendees and reviewed by expert panels formed during the conference. Herein, we present and discuss the 50 questions rated to... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00648/76030/76938.pdf |
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| Peharda, Melita; Thebault, Julien; Markulin, Kresimir; Schone, Bernd R.; Janekovic, Ivica; Chauvaud, Laurent. |
| High-resolution stable-isotope ratio data (delta O-18, delta O-18) were used to study growth strategies of two bivalve species, Pecten jacobaeus (calcitic shell) and Glycymeris pilosa (aragonitic shell) from the North Adriatic Sea. The principal objectives of this study were to identify the period of the year when the growth line is formed in the shell of two target species, to identify the main growing season of these two species, to identify the environmental drivers of shell growth, and to evaluate the potential applicability of delta O-18 and delta O-18 values for the reconstruction of environmental variability. Samples were collected from the North Adriatic Sea by commercial bean trawl (P. jacobaeus, December 2013 and January 2014, N = 4) and SCUBA... |
| Tipo: Text |
Palavras-chave: Sclerochronology; Mediterranean; Adriatic; Stable-isotope ratio geochemistry; Bivalve shells. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00615/72753/74907.pdf |
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| Purroy, Ariadna; Najdek, Mirjana; Isla, Enrique; Zupan, Ivan; Thebault, Julien; Peharda, Melita. |
| The trophic ecology of two bivalves, the clam Callista chione and the cockle Glycymeris bimaculata was studied using environmental and biochemical variables of the suspended particulate matter and the sediment. Samples were collected from two shallow sites, Pag and Cetina, in the coastal oligotrophic Mediterranean Sea, during a 17 month period. The temporal variation of the particulate matter reflected a mixture between marine and terrestrial sources throughout the year, with a clear marine influence during summer and fall, and predominance of terrestrial inputs during spring and winter. The digestive gland was a useful rapid turnover tissue, where the carbon isotope signal was species-specific and the nitrogen isotope one was site-specific. FA markers in... |
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Palavras-chave: Feeding ecology; Bivalves; Suspension feeder; Biochemical variables; Stable isotopes; Fatty acids; Adriatic sea; Niche partitioning; Coastal ecosystems. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00463/57478/59596.pdf |
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| Purroy, Ariadna; Segvic-bubic, Tanja; Holmes, Anna; Buselic, Ivana; Thebault, Julien; Featherstone, Amy; Peharda, Melita. |
| Morphological and molecular tools were combined to resolve the misidentification between Glycymeris glycymeris and Glycymeris pilosa from Atlantic and Mediterranean populations. The ambiguous literature on the taxonomic status of these species requires this confirmation as a baseline to studies on their ecology and sclerochronology. We used classical and landmark-based morphometric approaches and performed bivariate and multivariate analyses to test for shell character interactions at the individual and population level. Both approaches generated complementary information. The former showed the shell width to length ratio and the valve asymmetry to be the main discriminant characters between Atlantic and Mediterranean populations. Additionally, the... |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00354/46566/72953.pdf |
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