Fishes were collected from residential canal estates leading directly off natural estuaries and artificial lakes with control tidal exchange in south-east Queensland, Australia, to test the model that the difference in artificial waterway design affects fish assemblages. A total of 17 779 fish representing 52 species was caught, including 23 species of economic importance (45% of the catch). To...

Warming air temperatures in the Arctic are modifying the rates of thermokarst processes along Alaska’s Arctic Coastal Plain. The Arctic Coastal Plain is dominated by thaw lakes. These kilometer-scale lakes are the most visible surface features in the region, and they provide important habitats for migratory birds. The lakes are formed by thermokarst processes, and are therefore susceptible to c...

Adjacent food webs may be linked by cross-boundary subsidies: more-productive donor systems can subsidize consumers in less-productive neighboring recipient systems. Introduced species are known to have direct effects on organisms within invaded communities. However, few studies have addressed the indirect effects of nonnative species in donor systems on organisms in recipient systems. We studi...

The Great Lakes Water Quality Agreement commits the United States and Canada to restore and protect the chemical integrity of the Great Lakes basin. In particular, the Agreement commits to “virtually eliminate” selected persistent toxic substances. While progress has been made reducing these substances in the Great Lakes basin, other chemicals are emerging as potential pollutants in the basin. ...

Qualitative and quantitative phytoplankton compositions of 10 Montenegrin lakes were investigated in the summer of 2007. The obtained results were compared with a previous study-period that was undertaken two decades ago. In the first period, diatoms numerically dominated the phytoplankton community in all studied lakes, while in the second period, the same was observed only in three of the ten...

Since the 1980s, Swedish lakes have in general become less acidified. Assessment of biological recovery is, however, hampered by poor pre-acidification data, confounding effects of climate change, and few lakes with annual sampling of fish and other organisms. Only three critically acidified, but non-limed, lakes had two decades of fish monitoring. The lakes had not yet recovered to pre-industr...

The unique mosaic of ecosystems of the Danube Delta Biosphere Reserve, comprising an extensive network of channels, shallow pools and hundreds of lakes, combined with marshes, reed-beds, lagoons, islands and floodplains, form a valuable natural area, sheltering a high biodiversity. One of the main drivers of the functionality of these ecosystems is the climate change, affecting especially the s...

Liming has been used extensively in Scandinavia and elsewhere since the 1970s to counteract the negative effects of acidification. Communities in limed lakes usually return to acidified conditions once liming is discontinued, suggesting that liming is unlikely to shift acidified lakes to a state equivalent to pre-acidification conditions that requires no further management intervention. While t...

Supraglacial lakes are an important component of the Greenland Ice Sheet’s mass balance and hydrology, with their drainage affecting ice dynamics. This study uses imagery from the recently launched Sentinel-1A Synthetic Aperture Radar (SAR) satellite to investigate supraglacial lakes in West Greenland. A semi-automated algorithm is developed to detect surface lakes from Sentinel-1 images during...

Mantle helium and other volatiles may be released to volcanic crater lakes. This paper presents the observation of H and mantle helium in the crater Lakes Nemrut (Turkey), Laacher (Germany) and Pavin (France). The presence of excess H in the lakes can be explained as material released from mantle sources because of the correlation of excess H with mantle He and He. The helium concentration was ...