“我们发现,温度差异是决定平原斑马条纹的一个重要因素,”这项研究报告的主要作者,美国加州大学洛杉矶分校助理研究员布伦达·拉尔松博士在写给《赫芬顿邮报》的一封电子邮件中说,“季节性低温地区的斑马,条纹比气候持续温暖地区的斑马要少。”
For the study, the researchers analyzed variations in the stripes seen in plains zebras at 16 sites in Africa. The researchers then examined the relationship between the stripe patterns and 29 environmental variables, including climate to predation to biting flies.
关于这项研究,研究人员对非洲16个地区的平原斑马条纹变化进行了分析。他们然后还研究了这些条纹图案与29种环境变量之间的关系,包括气候、捕食和苍蝇叮咬等。
What did the analysis show? The extent of striping was correlated more closely with hot weather than with other environmental variables. In other words, the hotter their habitat the more stripes zebras tended to have.
分析说明了什么?相比其它环境变量而言,条纹的覆盖程度与热气候关系更紧密。换句话说,栖息地越热,斑马条纹就越多。
One hypothesis for the correlation is that bold black and white stripes cool zebras by creating convection currents in the air around the animals' bodies. That is, air moves faster over sunlight-absorbing black stripes and slower over white stripes to create cooling airflow, National Geographic reported.
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