Heavy metals in zooplankton and decapod crustaceans from the Barents Sea

Abstract

Trace metals (Cd, Cu, Pb and Zn) were analysed in zooplankton samples and decapod crustaceans collected on cruises of "RV Walther Herwig III" to the Barents Sea (Summer 1991(Summer , 1994(Summer and 2000. We found a substantial spatial heterogeneity in the decapod crustacean Pandalus borealis, with increasing Cd concentrations from the south (North Cape Bank; 0.7 mg kg -1 DW) to the north (north of Svalbard; 4.7 mg kg -1 ), supporting the hypothesis that the frequently reported Cd-anomaly in polar crustaceans might be extended to the Barents Sea. Regarding various crustaceans and zooplankton collectives (2000) a distinct interspecific heterogeneity of metals was obvious, with lowest Cd concentrations in euphausiids and chaetognaths and highest ones in decapods and hyperiid amphipods; lowest Cu concentrations in chaetognaths and copepods and highest ones in euphausiids and decapods; and lowest Zn concentrations in euphausiids and decapods and highest ones in some copepods. For Pb many values were below or close to the limit of detection, suggesting that Pb concentrations about 0.4 mg kg -1 might serve as a regional background value. Results for Cd, Cu and Zn in copepods of this study are largely within the reported range, but high Cd concentrations in copepods from summer in contrast to reported lower ones during winter/spring may be related either to changing accumulation strategies of the copepod species involved or to seasonally changing Cd absorption in copepods from food.keywords: biomonitoring; trace metals; zooplankton; Cd-anomaly; spatial, intra-and interspecific heterogeneity

Significance and Interspecific Variability of Accumulated Trace Metal Concentrations in Antarctic Benthic Crustaceans

“…Information from the literature on this issue is contradictory and inconsistent. For Pandalus borealis from the Barents Sea a size-dependent increase of Cd and Cu was reported from smaller to larger specimens (ZAUKE and SCHMALENBACH, 2006), in good agreement with the hypothesis discussed above. Pronounced intraspecific heterogeneities were also reported for some Antarctic crustaceans such as the isopod Ceratoserolis trilobitoides, the decapod Notocrangon antarcticus and the amphipod Eusirus propeperdentatus , showing an increase of whole-body Cu concentrations with increasing body length for the decapod and the amphipod.…”

Microcrustaceans escape behavior as an early bioindicator of copper, chromium and endosulfan toxicity

“…Zooplankton microcrustaceans are one of the most sensitive groups to these stressors, and during the last decades, intense efforts have been directed towards assessing the impact of heavy metals (Koivisto and Ketola 1995;Zauke and Schmalenbach 2006;Bossuyt and Janssen 2005) and pesticides (Barry and Logan 1998;DeLorenzo et al 2002) on these key groups of organisms. In general, different laboratory standard toxicity tests have been employed as well as field methods.…”

Source/process apportionment of major and trace elements in sinking particles in the Sargasso sea

“…Price and Morel, 1990; Morse and Bender, 1990), bioaccumulation (e.g. Fowler and Knauer, 1986;Reinfelder and Fisher, 1991;Carvalho et al, 1999;Zauke and Schmalenbach, 2005), chemical scavenging (e.g. Clegg and Sarmiento, 1989), authigenic mineral precipitation in particle interstices (e.g.…”