Study: Lizard Changed Genetically to Survive in the City
2023-01-17
LRC
TXT
大字
小字
滚动
全页
1A new study has found that a lizard that once lived in forests has gone through genetic changes to survive in city environments.
2Researchers studied a lizard called the crested anole.
3The lizard's official name is Anolis cristatellus.
4It is commonly found in the American territory of Puerto Rico.
5The team said it discovered the lizard had grown special scales that helped it climb more easily on smooth surfaces like walls and windows.
6It also grew longer legs in order to run faster across open areas.
7Kristin Winchell is a biology professor at New York University and the main writer of the study.
8She told The Associated Press, "We are watching evolution as it's unfolding."
9Research results were recently published in Proceedings of the National Academy of Sciences.
10Winchell said as city development spreads out around the world, it is important to understand how organisms adapt to new environments.
11That way, she added, humans can design cities in ways that can support all kinds of animals.
12The study examined 96 Anolis cristatellus lizards.
13Researchers compared the genetic makeup of lizards in forests to those living in Puerto Rico's capital, San Juan, as well as two other cities.
14Scientists found that 33 genes were repeatedly linked to city spread.
15Wouter Halfwerk is an evolutionary ecologist and professor at Vrije University Amsterdam.
16He was not involved in the study.
17He told the AP, "You can hardly get closer to a smoking gun," meaning evidence or proof of something.
18Halfwerk said he was excited that the researchers were able to identify such rich evidence that the lizards had changed genetically to adapt to a different environment.
19Winchell said the research demonstrated that scientists might be able to predict how populations will react to city environments just by looking at genetic signs.
20The study found that larger legs permitted the lizards to run more quickly across open city areas.
21And the special scales they developed permit them to hold onto surfaces that are much smoother than trees.
22The scientists followed many lizards for the study, using their hands or fishing poles to catch them.
23"It takes some practice," Winchell said.
24Among Winchell's favorite findings was a rare albino lizard.
25She also found a nearly 20-centimeter-long one, a rather large individual for that species of lizard.
26She decided to call that one "Godzilla."
27The study centered on adult male lizards, so it is unclear if females are changing in the same way or at the same rate as males.
28The researchers said it is also not clear at which point in a lizard's life the changes happen.
29Halfwerk's own research showed how one frog species changed its reproducing call in city areas.
30He said scientists should look next for possible limitations on evolutionary changes and how genetic adaptations relate to reproductive behavior.
31Halfwerk added that for the adaptive changes to be lasting, "they need to lead to higher reproduction."
32I'm Bryan Lynn.
1A new study has found that a lizard that once lived in forests has gone through genetic changes to survive in city environments. 2Researchers studied a lizard called the crested anole. The lizard's official name is Anolis cristatellus. It is commonly found in the American territory of Puerto Rico. 3The team said it discovered the lizard had grown special scales that helped it climb more easily on smooth surfaces like walls and windows. It also grew longer legs in order to run faster across open areas. 4Kristin Winchell is a biology professor at New York University and the main writer of the study. She told The Associated Press, "We are watching evolution as it's unfolding." 5Research results were recently published in Proceedings of the National Academy of Sciences. 6Winchell said as city development spreads out around the world, it is important to understand how organisms adapt to new environments. That way, she added, humans can design cities in ways that can support all kinds of animals. 7The study examined 96 Anolis cristatellus lizards. Researchers compared the genetic makeup of lizards in forests to those living in Puerto Rico's capital, San Juan, as well as two other cities. Scientists found that 33 genes were repeatedly linked to city spread. 8Wouter Halfwerk is an evolutionary ecologist and professor at Vrije University Amsterdam. He was not involved in the study. He told the AP, "You can hardly get closer to a smoking gun," meaning evidence or proof of something. 9Halfwerk said he was excited that the researchers were able to identify such rich evidence that the lizards had changed genetically to adapt to a different environment. 10Winchell said the research demonstrated that scientists might be able to predict how populations will react to city environments just by looking at genetic signs. 11The study found that larger legs permitted the lizards to run more quickly across open city areas. And the special scales they developed permit them to hold onto surfaces that are much smoother than trees. 12The scientists followed many lizards for the study, using their hands or fishing poles to catch them. "It takes some practice," Winchell said. 13Among Winchell's favorite findings was a rare albino lizard. She also found a nearly 20-centimeter-long one, a rather large individual for that species of lizard. She decided to call that one "Godzilla." 14The study centered on adult male lizards, so it is unclear if females are changing in the same way or at the same rate as males. The researchers said it is also not clear at which point in a lizard's life the changes happen. 15Halfwerk's own research showed how one frog species changed its reproducing call in city areas. He said scientists should look next for possible limitations on evolutionary changes and how genetic adaptations relate to reproductive behavior. 16Halfwerk added that for the adaptive changes to be lasting, "they need to lead to higher reproduction." 17I'm Bryan Lynn. 18The Associated Press reported this story. Bryan Lynn adapted the report for VOA Learning English. 19___________________________________________________________________ 20Words in This Story 21scale - n. a flat piece of hard material that covers the skin of some animals 22evolution - n. the way in which living things change and develop over millions of years 23adapt - v. to change something so that it is suitable for a different use or situation 24smoking gun - n. information that proves something is true 25practice - n. the act of doing something regularly in order to improve one's skills 26species - n. a group of animals or plants that are similar and can produce young animals or plants 27___________________________________________________________________ 28What do you think of this story? We want to hear from you. We have a new comment system. Here is how it works: 29Each time you return to comment on the Learning English site, you can use your account and see your comments and replies to them. Our comment policy is here.