海角大神

A new report released Thursday describes the success tales of some 18 mammal and 19 bird species that have made comebacks in Europe.

The paper, a collaborative project from the, ,聽and the , provides a comprehensive overview of the status of selected European species that have resurged across the continent since about 1960. The goal, the scientists say, is to identify which conservationist strategies have worked, and why.

鈥淲ildlife will fairly quickly 鈥� this report shows that,鈥� writes Frans Schepers, managing director of Rewilding Europe, in the paper. Rewilding Europe, a Dutch conservationist group, commissioned the report in 2011.

The authors of the report caution that, on the whole,聽we are still living in an age of extinctions. Europe鈥檚 biodiversity is decreasing. But the authors say that highlighting conservationism鈥檚 success, and assessing just how and why certain efforts worked, is a productive step in future conservation efforts. Doing so, they say, supplies possible templates for what might herald eventual good news, too, for Europe鈥檚 still-threatened animals.

The beaver is Europe鈥檚 greatest success tale, at least by number. The buck-toothed rodent has rebounded from just 1,200 individuals as of about 1900 鈥� most of the animals had been turned into pelts and caps 鈥� to about 337,500 individuals this year, according to the report. The Eurasian beaver, the second largest rodent in the world (after the capybara), builds the all-important natural dams that keep the Continent鈥檚 water ecosystems in good health, as well as furnishes a small but lucrative swath of the European tourism sector.

But a close runner-up to the beaver is聽the bison. Europe鈥檚 largest herbivore has increased in number almost 3,000 percent since 1960, after it was hunted almost to extinction about 100 years earlier. The researchers attributed the bounce-back to captive breeding programs, beginning in 1952, that later turned into vast relocation efforts.

Other mammal success stories include the gray seal, the Pyrenean ibex, and the brown bear. Europe鈥檚 resurgent bird groups include the pink-footed goose, the white-headed duck, and the Spanish imperial eagle.

Translocations and reintroductions 鈥� or, moving species to zones identified as conducive to the animal鈥檚 success 鈥� were the most successful conservation strategies, the researchers reported.

Of the species studied, just one is still declining in number: the Iberian lynx. The wild cat is the world鈥檚 most endangered feline species, numbering just about 200, even though about $118 million in funding has been marshaled toward its protection since 1994.

This summer, a team of researchers reported that current conservation efforts targeting the lynx would buy the predator just 50 years more time on this planet. That鈥檚 because climate change is predicted to outpace efforts to relocate the cat to areas where its food source, the hare, is expected to be more populous, a point emphasizing that future relocation efforts must take into account climate shifts.

The new paper comes just a day before the Intergovernmental Panel on Climate Change is expected to release its highly anticipated report on climate change.