" Daphnia 's high gene number is largely because its genes are multiplying , by creating copies at a higher rate than other species , " said colbourne , genomics director at the center for genomics and bioinformatics .
What 's more , the hybrids remained the dominant daphnia species decades after pollution control measures brought nutrient levels back to normal .
此外,这些杂交品种在污染控制手段使营养水平回复到正常的数十年间依旧保持着优势水蚤品种的地位。
Using samples from two european lakes , swiss researchers studied a century 's worth of eggs buried deep in the sediment by two species of daphnia , a tiny crustacean .
瑞士的研究者从两条欧洲的河流中抽取样本,研究由两种水蚤(一种微小的甲壳类生物)掩埋于沉淀深处的卵。
Often studied by scientists who want to learn about the effects of pollution and environmental changes on water creatures , the almost-microscopic freshwater daphnia is the first crustacean to have its genome sequenced .
Daphnia has a large number of never-before seen genes , as well as a big chunk of the same genes found in humans , the most of any insects or crustacean so far known to scientists .