are some examples in animal behaviors to adapt to climate change? Example 1: Example 2: Example 3: THE EXAMPLES ARE RIGHT IN THE TEXT NOT FROM GOOGLE Transcribed Image Text:

are some examples in animal behaviors to adapt to climate change?
Example 1:
Example 2:
Example 3:
THE EXAMPLES ARE RIGHT IN THE TEXT NOT FROM GOOGLE Transcribed Image Text: How Animals Fight Global Warming
Inving to Adapt
Several years have passed since studies conclusively demonstrated that global warming is changing where and when many animals feed and reproduce. In 2003, two important
reports showed that more than 100 species have shifted their habitat ranges toward the poles at an average of 4 miles a decade and that thousands of others were emerging,
migrating or breeding days to weeks earlier than they did a century ago.
The Dangers of Change
Animal species differ in the way they adapt to climate change. As a result, range shifts by animal populations can create problems for animals that remain in their historical
ranges. Similarly, changes in seasonal timing can take animals out of sync with the seasonal appearance of the plants and prey they need to survive.
Desperate Adaptations
Now a scattering of reports from around the world suggest these mismatches may be producing a new level of behavioral changes. “The first kinds of behavioral changes were
changes in range and timing,” says Camille Parmesan, a biologist at the University of Texas, Austin. “Now we’re seeing changes in diets and other behaviors that show some
animals are trying to adapt to their new circumstances. Unfortunately, may instances are more an act of desperation than a true adaptation.”
Bears on Thin Ice
Arctic ice cap melting, which has been increasing for years, spells big trouble for polar bears, because their main prey, ringed seals give birth on the ice in April and May,
providing the bears with most of the food they need to survive the lean summer ahead. “With the ice breakup advancing three weeks over the last 30 years, that means a lot of
thin and hungry bears coming onto land each spring,” says lan Stirling, a veteran polar bear biologist with the Canadian Wildlife Service.
The Changing Polar Bear Diet
Already, increasing numbers of polar bears are coming into towns and hunting camps in search of food. At the same time, the first bears to come off the ice each spring are
beginning to overlap with the nesting season of Arctic geese and ducks. Some experts believe this may be turning an occasional deviation-a polar bear snacking on
eggs-into a regular habit. “We’re definitely seeing an increase in the last five to six years,” says snow goose expert Robert Rockwell of the American Museum of Natural
Polar Bears. Snow Geese and Global Warming
An increase in egg-gobbling polar bears is affecting the colonies of snow geese at northern Manitoba’s La Perouse Bay. But this change might turn out to be a good thing, notes
Rockwell. “In 1969, this goose colony had around 2,500 nesting pairs,” he explains. “Now it’s over 50,000.” This population explosion may stem from the increased availability of
corn and rice in the goose’s wintering grounds across the northern plains. “Lots of people think it’s cool to see these beautiful funnel clouds of snow geese,” Rockwell says.
“Problem is, the Arctic environment is very fragile, and these guys have beaten it to death.”
Eggs Aren’t Enough for Bears
In any event, veteran polar bear biologists such as Stirling don’t think goose eggs will save hungry bears. “An adult polar bear needs to eat around 43 ringed seals or the
equivalent to make it through a year,” Stirling points out. “That’s a huge amount of biomass that makes the seasonal intake of goose eggs by a few polar bears look trivial.”
Changes in Chromosomes
Many survival instincts are hardwired into an animal’s genes. Changes in day length, for example, trigger migration, mating or hibernation in many species. Many insects and
other invertebrates also are programmed to respond to set images of what to eat or where to lay eggs. “A change in these responses requires wholesale changes in genetic
makeup,” Parmesan, a wildlife biologist explains. For example, Parmesan discovered in the 1990s that a West Coast butterfly called Edith’s checkerspot had shifted its range
north, one of the first examples of a clear relationship between behavior and global warming.
Which Species Are Most Likely to Survive Global Warming?
In general, insects and other animals with short life cycles and large broods stand the best chance of making the rapid genetic adaptations that global warming demands.
Unfortunately, most species, especially larger mammals, have slow reproductive cycles. Many wildlife biologists believe that the climate change we’re seeing is far faster than
most organisms’ ability to evolve. As a result, their survival will require people to change in two significant ways. We need to both reduce our carbon footprint to slow global
warming, and we need to strengthen environmental protection in a way that makes habitats more resilient in the face of climate change.

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