VOA标准英语2009年-Organizations Join Forces to Protect Tiny(在线收听) |
By Zulima Palacio Craig Patterson, with the Maryland Department of Natural Resources, uses a piece of equipment (resembling a hand-held remote control and antenna) to find a tiny bog turtle, underground. "The transmitter that is on the turtle emits a signal," Patterson explains, "I can hear that signal with the headphones and as we get closer it gets louder and louder. And once we get near the turtle, we can point this at the ground, sweep and we usually know exactly where the turtle is." Somewhere in these few hectares of protected land, some 35 turtles are living under the mud. The bog turtle is one of the smallest in North America and is listed as an endangered species. Only several thousand survive. They live in small pockets of wetland like this one, in a few states on the east coast of the United States. For the last 17 years, Scott Smith has been working with the turtles. Holding a turtle he says, "This one has had a chronic problem with an ear infection." The male turtle was first found 12 years ago. Experts guess he is 40 years old and could live another 20. He weighs about 130 grams, and the transmitter on its back is 7 grams. The antenna helps scientist check regularly on his health, as well as on behaviors and places where he hibernates. But being cute didn't help them. Julie Slacum from the United States Fish and Wildlife Service explains. "Part of the issue is loss of the habitat," she says, "but part of the issue was people going into the wetlands, taking the turtles and selling them illegally." A slow reproduction process, predators and animals such as raccoons that eat turtle eggs also threaten their survival. "Females have to be about 10-years-old when they first reproduce. They only reproduce once a year and they only lay 2 to 5 eggs," Smith said. Development and changes in the waterways have dramatically altered the turtle's habitat. Now, as the bog turtle faces extinction, local governments and environmental organizations have joined forces to protect it. Years ago this area was scheduled to be paved for a highway. The highway, away from the turtles' protected area, is almost finished. There are also efforts to restore the turtles' habitat. Goats and sheep are now clearing invasive vegetation from the area, avoiding chemicals or machines that could threaten the turtles. |
原文地址:http://www.tingroom.com/voastandard/2009/9/82906.html |