Human impacts in Antarctica: trace-element geochemistry of freshwater lakes in the Larsemann Hills, East Antarctica

Tracking human footprints in Antarctica through passive sampling of polycyclic aromatic hydrocarbons in inland lakes

“…1). Snowmelt and rain from strong easterly katabatic winds converge into the seven inland lakes with water depths of 2e5 m. The salinity was below 1‰, the average pH value was 7 ± 1 and water temperature was 0e6 C (Gasparon and Burgess, 2000;Gasparon et al, 2002). The surroundings of the lakes appeared similar, i.e., large numbers of rocks, soil and snow were around the lakes.…”

“…In the Larsemann Hills, most lakes are filled by snow melt and the lake surface was only thawed for up to two months in summer (December to March) (Council of Managers of National Antarctic Programs, 2014; Gasparon and Burgess, 2000); thereby snowmelt embracing spilled fuel may have been an important process contributing to the loadings of PAHs in inland lakes. In 2003, Goldsworthy et al (2003) reported that most of the concentrations of 2-MNap in soils collected from fuel farms, workshops, incinerator and abandoned fuel drums around four scientific stations in the Larsemann Hills exceeded 0.2 mg kg…”

A preliminary record of the historical seabird population in the Larsemann Hills, East Antarctica, from geochemical analyses of Mochou Lake sediments

“…The 87 Sr/ 86 Sr ratios were normalized to an 86 Sr/ 88 Sr ratio of 0.1194. Reproducibility of the The data listed in the table are from the work of Li et al (1997), Liang et al (1999), Gasparon & Burgess (1999) and Gasparon et al (2002). Sur.…”

“…1), orientated north Ásouth and extending from beneath the Antarctic ice cap towards the ocean. The basement geology mainly comprises a composite maficÁfelsic orthogneiss (Gasparon & Burgess 1999;Gasparon et al 2002). It has a continental Antarctic climate, colder and drier than maritime Antarctica.…”

Planktonic microbial assemblages and the potential effects of metazooplankton predation on the food web of lakes from the maritime Antarctica and sub-Antarctic islands

“…Pizarro et al 2004), with those lakes located close to the sea, although being commonly freshwater lakes (Hansson and Hå kansson 1992), presenting higher salt contents than those located further away. Direct flooding by sea intrusion or sublacustrine penetration of sea water can cause salinization of coastal lakes, but sea spray brought by the strong Antarctic winds can also transport salts to inland lakes in zones close to the coast (Gasparon and Burgess 2000), thus influencing their salt content otherwise just depending on the geology of the catchments. When salt accumulation in deep lake waters results in higher water density a crenogenic meromixis would originate, otherwise the lakes would follow an stratification pattern depending on their morphometric features and determined by climatic conditions (Wetzel 2001).…”