Oceanographic control on shell growth of Arctica islandica (Bivalvia) in surface waters of Northeast Iceland — Implications for paleoclimate reconstructions

2015 ◽  
Vol 420 ◽  
pp. 138-149 ◽  
Author(s):  
Soraya Marali ◽  
Bernd R. Schöne
Keyword(s):  
Surface Waters ◽  
Shell Growth ◽  
Arctica Islandica ◽  
Paleoclimate Reconstructions

Precise Temporal Correlation of Holocene Mollusk Shells Using Sclerochronology

2000 ◽  
Vol 53 (2) ◽  
pp. 236-246 ◽  
Author(s):  
Thomas M. Marchitto ◽  
Glenn A. Jones ◽  
Glenn A. Goodfriend ◽  
Christopher R. Weidman
Keyword(s):  
Shell Growth ◽  
Morphological Characteristics ◽  
Temporal Correlation ◽  
Band Width ◽  
Georges Bank ◽  
Arctica Islandica ◽  
Mollusk Shells ◽  
Aspartic Acid Racemization ◽  
Geochemical Proxies ◽  
Growth Bands

AbstractAnnual growth bands of mollusk shells record several types of paleoenvironmental information, including geochemical proxies for water properties and morphological characteristics of growth and mortality. Sclerochronology, the marine counterpart of dendrochronology, offers a way to link individual shells together to form long continuous records of such parameters. It also allows for precise dating of recent shells and identification of contemporaneous fossil individuals. The longevity of the ocean quahog Arctica islandica (commonly >100 yr) makes this species well suited for sclerochronology. Band width records of contemporaneous A. islandica specimens from the same region exhibit high correlations (ρ = 0.60–0.80 for spans of ≥30 bands), indicating some common environmental influences on shell growth. By adopting several strict criteria, fossil (dead-collected) shells can be linked into composite sclerochronologies. A seven-shell 154-yr chronology was constructed for Georges Bank using three live-collected and four dead-collected shells. Band width matching indicates that the dead-collected individuals died in A.D. 1950, 1971, 1978, and 1989. Sclerochronological age assignments were verified using aspartic acid racemization dating. Construction of a 1000-yr sclerochronology is judged to be feasible using the described methods.

scholarly journals Impact of ocean acidification and elevated temperatures on early juveniles of the polar shelled pteropod <i>Limacina helicina</i>: mortality, shell degradation, and shell growth

2010 ◽  
Vol 7 (6) ◽  
pp. 8177-8214 ◽  
Author(s):  
S. Lischka ◽  
J. Büdenbender ◽  
T. Boxhammer ◽  
U. Riebesell
Keyword(s):  
Ocean Acidification ◽  
Surface Waters ◽  
Elevated Temperatures ◽  
Shell Growth ◽  
Shell Diameter ◽  
Partial Pressures ◽  
Limacina Helicina ◽  
Different Temperatures ◽  
Arctic Surface

Abstract. Due to their aragonitic shell thecosome pteropods may be particularly vulnerable to ocean acidification driven by anthropogenic CO2 emissions. This applies specifically to species inhabiting Arctic surface waters that are projected to become locally undersaturated with respect to aragonite as early as 2016. This study investigated the effects of rising pCO2 partial pressures and elevated temperature on pre-winter juveniles of the polar pteropod Limacina helicina. After a 29 days experiment in September/October 2009 at three different temperatures and under pCO2 scenarios projected for this century, mortality, shell degradation, shell diameter and shell increment were investigated. Temperature and pCO2 had a significant effect on mortality, but temperature was the overriding factor. Shell diameter, shell increment and shell degradation were significantly impacted by pCO2 but not by temperature. Mortality was 46% higher at 8 °C compared to 3 °C (in situ), and 14% higher at 1100 μatm CO2 as compared to 230 μatm CO2. Shell diameter and increment were reduced by 10% and 12% at 1100 μatm CO2 as compared to 230 μatm CO2, respectively, and shell degradation was 41% higher at elevated compared to ambient pCO2 partial pressures. We conclude that pre-winter juveniles will be negatively affected by both rising temperature and pCO2 which may result in a possible abundance decline of the overwintering population, the basis for next year's reproduction.

Links between phytoplankton dynamics and shell growth of Arctica islandica on the Faroe Shelf

2018 ◽  
Vol 179 ◽  
pp. 72-87 ◽  
Author(s):  
Fabian Georg Wulf Bonitz ◽  
Carin Andersson ◽  
Tamara Trofimova ◽  
Hjálmar Hátún
Keyword(s):  
Shell Growth ◽  
Phytoplankton Dynamics ◽  
Arctica Islandica

Annual cycle of shell growth increment formation in two continental shelf bivalves and its paleoecologic significance

Paleobiology ◽  
1980 ◽  
Vol 6 (3) ◽  
pp. 331-340 ◽  
Author(s):  
Douglas S. Jones
Keyword(s):  
Growth Rate ◽  
Continental Shelf ◽  
Annual Cycle ◽  
Shell Growth ◽  
Growth Increment ◽  
Age And Growth ◽  
Growth Line ◽  
Arctica Islandica ◽  
Growth Increments ◽  
Increment Formation

The bivalvesSpisula solidissima, the Atlantic surf clam, andArctica islandica, the ocean quahog, from the continental shelf off New Jersey, contain repeating structures in their shells. By analyzing the growing shell margins in living specimens at bi-weekly (or sometimes monthly) intervals throughout two consecutive years, it was possible to define an annual cycle of shell growth increment formation in both species. The shell increments in each species are microstructurally distinct units that form over a period of several months at select seasons of the year. Each species has two alternating shell growth increments, GI I and GI II. GI I (the annual growth line of previous studies) is formed annually in the late summer-fall inS. solidissimaand in the fall-early winter inA. islandica.These periods correspond to the spawning phase of the reproductive cycle in both species. No winter rings were found. The annual increments were used to determine age and growth rate in both Recent and Pleistocene specimens. They may also be useful in determining season of death. Because shell growth increments are formed in synchrony among living populations in these species, mass mortalities may be distinguished in the fossil record. Accurate age and growth rate determinations in fossils are important in many paleobiologic contexts, such as deciding between increased longevity or growth rate in cases of phyletic size increase.

scholarly journals Validated age, growth, and mortality estimates of the ocean quahog (Arctica islandica) in the western Atlantic

2006 ◽  
Vol 64 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Raouf W. Kilada ◽  
Steven E. Campana ◽  
Dale Roddick
Keyword(s):  
Atomic Bomb ◽  
Growth Parameters ◽  
Shell Growth ◽  
Arctica Islandica ◽  
Western Atlantic ◽  
Instantaneous Rate ◽  
Growth Increments ◽  
Age Frequency Distribution ◽  
Mortality Estimates ◽  
Age Estimates

Abstract Kilada, R. W., Campana S. E., and Roddick, D. 2007. Validated age, growth, and mortality estimates of the ocean quahog (Arctica islandica) in the western Atlantic. ICES Journal of Marine Science, 64: 31–38. The age structure of offshore (Sable Bank) and inshore (St Mary's Bay) populations of eastern Canadian ocean quahogs (Arctica islandica), and of a northwestern Iceland population, is investigated. Age estimates for eastern Canadian ocean quahogs were validated through analysis of bomb-produced 14C in quahog shell growth increments deposited before, during, and after the atmospheric atomic bomb testing periods of the 1950s and 1960s. Delta 14C from shells with presumed birthdates between the late 1950s and 1970s clearly reflects the sharp increase in oceanic radiocarbon attributable to nuclear testing. The results validate our age interpretations of Sable Bank quahogs to an age of 45 y, and support longevity estimates of more than 200 y for the same population. Longevity calculations for the other populations exceeded 60 y. Von Bertalanffy growth parameters were estimated for the three populations; the growth rate of all three was relatively rapid for the first 20–30 y of life, but thereafter was very slow. The instantaneous rate of natural mortality (M), calculated using the age–frequency distribution of the unexploited populations, was estimated to be 0.03 and 0.10 for the Sable Bank and St Mary's Bay populations, respectively.

A Long-Term Growth Record Derived from Arctica Islandica (Mollusca, Bivalvia) from the Fladen Ground (Northern North Sea)

1997 ◽  
Vol 77 (3) ◽  
pp. 801-816 ◽  
Author(s):  
R. Witbaard ◽  
G.C.A. Duineveld ◽  
P.A.W.J. De Wilde
Keyword(s):  
Time Series ◽  
North Sea ◽  
Shell Growth ◽  
Growth Patterns ◽  
Arctica Islandica ◽  
Long Cycle ◽  
Northern North Sea ◽  
The 1960S ◽  
Long Term Variations

Long-term variations in shell growth of the mollusc Arctica islandica (Mollusca, Bivalvia) from the northern North Sea have been assessed retrospectively using the annually deposited internal growth lines. Relatively young specimens yielded a detailed year-to-year chronology while the growth record of specimens older than 30 y yielded a time series with a length exceeding 100 years. The long-term growth trends demonstrated a marked alternating sequence of periods in which growth was below and above expectation. A 33-y long cycle could be discerned. Since the 1960s the growth patterns in Arctica from two nearby locations were opposite, while they resembled each other in the period before 1960.

Sign in / Sign up

Export Citation Format

Share Document