Bad news again for the Monarch butterfly: Drought conditions and
historic wildfires the past few years continue to decrease their numbers
as they wing across Texas this spring. Worse news: milkweed plants --
the only kind they need to survive -- are also not in plentiful supply,
says a Texas A&M University Monarch watcher.
Craig Wilson, a senior research associate in the Center for
Mathematics and Science Education and a longtime butterfly enthusiast,
says reports coming from Mexico where the Monarchs have their breeding
grounds show their numbers are significantly down, a disturbing trend
during much of the past decade.
"The severe drought in Texas and much of the Southwest continues to wreak havoc with the number of Monarchs," Wilson explains.
"The conditions have been dry both here and in Mexico in recent
years. It takes four generations of the insects to make it all of the
way up to Canada, and because of lack of milkweed along the way, a lot
of them just don't make it."
The dry conditions and changing farming practices are hampering the
growth of milkweed, the only type of plant the Monarch will digest as it
makes its trip north. Texas has had dozens of wildfires in the past few
years that have hampered milkweed growth, and even though there are
more than 30 types of milkweed (Asclepiadaceae) in the state, the
numbers are not there to sustain the Monarchs as they start their
2,000-mile migration trip to Canada. Increased use of pesticides is also
adversely affecting milkweed production, he notes.
"But if people want to help, they can pick up some milkweed plants
right now at local farmer's cooperative stores," he says, "and this
would no doubt be a big boost to help in their migration journey."
The Monarch reserves are in the Mexican state of Michoacan. It's an
area where tens of millions of Monarchs spend the winter and mate before
heading north, Wilson points out.
"On a recent visit to the Monarch overwintering sites in Michoacan,
former President Jimmy Carter said: 'The Monarch butterfly unites the
three countries of North America in peace.
It is an ambassador of peace which requires protected areas and
ecosystems that are preserved through sustainable agricultural and
forestry practices. We need to work together to maintain a healthy and
balanced ecosystem for all North America," Wilson adds.
"It is important to have a national priority of planting milkweed to
assure there will be Monarchs in the future," Wilson believes. "If we
could get several states to collaborate, we might be able to provide a
'feeding' corridor right up to Canada for the Monarchs."
Wilson is currently adding a variety of milkweed plants to the
existing Cynthia Woods Mitchell Garden on the Texas A&M campus. He
recommends the following sites for Monarch followers: Journey North,
Texas Monarch Watch and Monarch Watch.
Source of Article: http://www.sciencedaily.com/
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