Stable isotopes prove shell growth bands in the Antarctic bivalve Laternula elliptica to be formed annually
نویسندگان
چکیده
منابع مشابه
Iceberg Scour and Shell Damage in the Antarctic Bivalve Laternula elliptica
We document differences in shell damage and shell thickness in a bivalve mollusc (Laternula elliptica) from seven sites around Antarctica with differing exposures to ice movement. These range from 60% of the sea bed impacted by ice per year (Hangar Cove, Antarctic Peninsula) to those protected by virtually permanent sea ice cover (McMurdo Sound). Patterns of shell damage consistent with blunt f...
متن کاملMetabolic demand, oxygen supply, and critical temperatures in the Antarctic bivalve Laternula elliptica.
Oxygen consumption (Mo(2)), heartbeat rate and form, and circulating hemolymph oxygen content were measured in relation to temperature in the large Antarctic infaunal bivalve Laternula elliptica. After elevations in temperature from 0 degrees to 3 degrees, 6 degrees, and then 9 degrees C, Mo(2) and heartbeat rate rose to new levels, whereas maximum circulating hemolymph oxygen content fell. At ...
متن کاملMitochondrial function and critical temperature in the Antarctic bivalve, Laternula elliptica
Thermal sensitivities of maximum respiration and proton leakage were compared in gill mitochondria of the Antarctic bivalve Laternula elliptica for an assessment of the contribution of mitochondrial mechanisms to limiting temperature tolerance. Proton leakage was measured as the oxygen consumption rate during blockage of oxidative phosphorylation (state IV respiration+ oligomycin). The maximum ...
متن کاملOcean Acidification at High Latitudes: Potential Effects on Functioning of the Antarctic Bivalve Laternula elliptica
Ocean acidification is a well recognised threat to marine ecosystems. High latitude regions are predicted to be particularly affected due to cold waters and naturally low carbonate saturation levels. This is of concern for organisms utilising calcium carbonate (CaCO(3)) to generate shells or skeletons. Studies of potential effects of future levels of pCO(2) on high latitude calcifiers are at pr...
متن کاملProduction of reactive oxygen species by isolated mitochondria of the Antarctic bivalve Laternula elliptica (King and Broderip) under heat stress.
Formation of reactive oxygen species (ROS) in mitochondrial isolates from gill tissues of the Antarctic polar bivalve Laternula elliptica was measured fluorimetrically under in vitro conditions. When compared to the rates measured at habitat temperature (1 degrees C), significantly elevated ROS formation was found under temperature stress of 7 degrees C and higher. ROS formation correlated sign...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polar Biology
سال: 1997
ISSN: 0722-4060,1432-2056
DOI: 10.1007/s003000050143