Influence of glacial runoff on baseline metal accumulation in the Antarctic limpet Nacella concinna from King George Island.
نویسندگان
چکیده
منابع مشابه
Differences in the physiological response of inter- and subtidal Antarctic limpets Nacella concinna to aerial exposure
Antarctic intertidal zones are extremely harsh environments, and the Antarctic limpet Nacella concinna is one of the most conspicuous components of the macrofauna, colonizing such areas at King George Island, South Shetlands. The limpet subpopulation encompasses an intertidal and a subtidal ecomorph; these differ with respect to shell height and inner volume. We studied morphological, behaviour...
متن کاملExtinction and recolonization of maritime Antarctica in the limpet Nacella concinna (Strebel, 1908) during the last glacial cycle: toward a model of Quaternary biogeography in shallow Antarctic invertebrates.
Quaternary glaciations in Antarctica drastically modified geographical ranges and population sizes of marine benthic invertebrates and thus affected the amount and distribution of intraspecific genetic variation. Here, we present new genetic information in the Antarctic limpet Nacella concinna, a dominant Antarctic benthic species along shallow ice-free rocky ecosystems. We examined the pattern...
متن کاملStrong population genetic structure in a broadcast-spawning Antarctic marine invertebrate.
Although studies of population genetic structure are commonplace, a strong bias exists toward species from low latitudes and with relatively poor dispersal capabilities. Consequently, we used 280 amplified fragment length polymorphism bands to explore patterns of genetic differentiation among 8 populations of a high latitude broadcast-spawning marine mollusc, the Antarctic limpet Nacella concin...
متن کاملDifferences in heavy metal concentrations and in the response of the antioxidant system to hypoxia and air exposure in the Antarctic limpet Nacella concinna.
During the austral spring and summer months, the Antarctic limpet Nacella concinna colonizes intertidal environments in the Western Antarctica Peninsula region. The species is divided into a permanently sub-littoral and a seasonally intertidal, migratory subpopulation. We investigate the physiological differentiation between the two limpet groups to identify cellular and molecular changes that ...
متن کاملEffect of sperm concentration and sperm ageing on fertilisation success in the Antarctic soft-shelled clam Laternula elliptica and the Antarctic limpet Nacella concinna
Sperm concentration and sperm ageing effects on fertilisation success were evaluated in the laboratory in the free-spawning Antarctic soft-shelled clam Laternula elliptica and Antarctic limpet Nacella concinna. Fertilisation success was highly dependent on sperm concentration. Highest levels of fertilisation success were consistently replicated at ~107 sperm ml–1 for L. elliptica, and ~106 to 1...
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عنوان ژورنال:
- Marine pollution bulletin
دوره 49 1-2 شماره
صفحات -
تاریخ انتشار 2004