[全文听写]：
Hints：
Dutch
DNA
the journal Molecular Ecology
To monitor the biodiversity of a freshwater habitat, you could camp out by the water and count the rare wildlife. Or you could just scoop up a cup of water. A new Dutch study has found that the DNA traces in a small sample of a body of water can reveal the species that live in it. The work is in the journal Molecular Ecology. As animals swim through a lake, they leave behind traces of DNA. The more individuals of a particular species, the more DNA of that species will be shed. And be available to be measured. The researchers tested about 100 European lakes and streams, comparing the DNA evidence to traditional fauna observations. And the small-sample technique enabled them to correctly identify the species and the sizes of their populations. Measuring biodiversity is an important part of protecting endangered species. This quick and easy method of snagging a water sample, which can be tested at a lab miles away from the site, could refresh the process of species monitoring.
为了监测一个淡水区的生物多样性，你可以借助那里的水以获取该水域存在何种生物并记录稀有野生生物的数量。或许你只需要一杯那里的水，一切尽在掌握~~荷兰的一项新研究发现水体样本中的DNA痕迹可以反映生存在该水域中的物种信息。这项研究结果已发表在《分子生态学》杂志上。 动物游过一个湖，它们同时也留下了其DNA痕迹。某个特别的物种的个体越多，就会留下越多该物种DNA痕迹。 研究人员们检测了约100个欧洲的湖泊河流，将其所含DNA痕迹与传统物种保存库中的数据进行比对。这种微样本检测技术使他们对该地区物种的种类确认以及其种群数量规模等信息记录得以校正。 记录生物多样性对保护濒危物种工作来说是很重要的一部分内容。这种根据一杯水样本即可进行的快速简便的检测技术，使科学家们即使在远离检测点的实验室中也能继续对该地区物种的检测工作了。 —Sophie Bushwick ------------------------------------------by hyjtb