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← Once-Rare Butterfly Species Now Thrives, Thanks to Climate Change

Once-Rare Butterfly Species Now Thrives, Thanks to Climate Change - Comments

Neodarwinian's Avatar Comment 1 by Neodarwinian

Explain this deniers!

Each species has it's season on the earth, but I do not think humans have the right to " adjust " this natural evolutionary process. Right, or not it is happening and where is the explanation for this from thouse that say, " no warming for the last fifteen years. "

Sat, 26 May 2012 22:42:23 UTC | #943716

Zeuglodon's Avatar Comment 2 by Zeuglodon

The problem with this is that it's like blaming any one hurricane on global warming. In a complex system with many factors, you can't point at any one factor and at any one event and definitively say they're causally linked. We can only say that hurricanes and species expansions, in a general statistical sense, would be effected by climate change. Hurricanes, for instance, would become more powerful and species expansions would tend to accord with biome shifts.

Thus far, the world’s climate has warmed roughly 0.8 degree Celsius over the course of the last century or so, thanks to a rise in greenhouse gas concentrations now approaching 400 parts-per-million. With that amount of warming, biologists expect some species ranges to expand and others to contract but, thus far, many wily animals and plants have been confounding scientists’ expectations. In some cases, species that favor a warmer climate have actually retreated (think: lizards or amphibians). Or others have expanded even faster than the climate has warmed (think: tree species moving up a mountain slope).

Obviously climate change isn’t the only factor in play. Habitat loss and disease seem to be dooming many varieties of amphibian while plants may be benefiting from human help (carried along on our own fossil fueled travels by car or plane).

I find myself very intrigued to know what the actual distributions of multiple species looks like relative to their habitats. A lot of the change would occur in aquatic and marine environments where most of the carbon and heat has a greater effect on, for example, coral and free-swimming plankton.

Sat, 26 May 2012 23:48:17 UTC | #943729

Rafa-ga's Avatar Comment 3 by Rafa-ga

At my parent's house, a couple of swallows made their nest about 15 years ago. They used to migrate every winter, but not anymore. My mom told me that this past winter was the second consecutive they have not migrated.

Sun, 27 May 2012 00:01:57 UTC | #943731

GPWC's Avatar Comment 4 by GPWC

What's with the title of this piece?

"Once-Rare Butterfly Species Now Thrives, Thanks to Climate Change"

I rather think the title should have been taken from the later part of the article where the bigger picture is summed up as follows:

"Of course, this expansion in the north is counterbalanced by a loss of habitat further south, where conditions are rapidly becoming too hot for the butterfly. “The picture across its whole distributional range in Europe looks somewhat different,” notes ecologist Oliver Schweiger of the Heimholtz Centre for Environmental Research in Halle, Germany, who was not involved in the research. His modeling work suggests that, even assuming the butterfly can fly past any natural features that might otherwise restrict range expansion, “large range retractions in the South cannot be counterbalanced by the expansions in the North.” And even flying animals, like butterflies and birds, can’t seem to keep pace with the poleward march of temperature bands, according to Schweiger’s work".

So perhaps the headline should have been:

"Rare butterfly expands northward but loses even more ground in the South, Thanks to climate change."

Mon, 28 May 2012 07:34:07 UTC | #943916