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Topic: trophic levels

PCB pollution threatens to wipe out killer whales

More than forty years after the first initiatives were taken to ban the use of PCBs, the chemical pollutants remain a deadly threat to...

NASA satellites assist states in estimating abundance of key wildlife species

Climate and land-use change are shrinking natural wildlife habitats around the world. Yet despite their importance to rural economies and natural ecosystems, remarkably little...

Animals and fungi enhance the performance of forests

A new study shows that, in addition to the diversity of tree species, the variety of animal and fungus species also has a decisive...