Emigration and mortality of black-necked swans (Cygnus melancoryphus) and disappearance of the Macrophyte Egeria densa in a Ramsar Wetland site of Southern Chile

Article Abstract:

A study of severe biotic changes occurring in the Ramsar wetland site of Rio Cruces, the main reproductive site of the charismatic and vulnerable Black-necked swans is presented. A high emigration rate and mortality of the swans and reduction of Egeria densa was the result of water quality changes induced by the discharges of waste water of the pulp mill into the river upstream.

Chile, Physiological aspects, Birds, Bird migration, Habitat partitioning (Biology), Habitat partitioning (Ecology), Water quality, Trumpeter swan, Trumpeter swans

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Polonium, uranium and plutonium in the Southern Baltic Sea

Article Abstract:

Concentrations of polonium, uranium, plutonium were tested in both seawater and phytoplankton samples from the Baltic Sea. Some species carried high levels of these radioactive materials. The effect on human populations was discussed.

Europe, except European Union, Europe, Measurement, Testing, Pollution, Metals, Metals (Materials), Uranium, Plutonium, Phytoplankton, Sea-water, Seawater, Baltic Sea

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Decadal-scale trends across several marine trophic levels in the southern Benguela upwelling system off South Africa

Article Abstract:

The significant increase in zooplankton in the southern Benguela area is studied. Various aspects of the plankton increase, including the possible effect on the pelagic fish population, are discussed.

South Africa, Zooplankton, Fishes

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