Karol Kenneth G, Sleith Robin S
Lewis B. and Dorothy Cullman Program for Molecular Systematics, The New York Botanical Garden, Bronx, New York, 10458, USA.
J Phycol. 2017 Oct;53(5):1106-1108. doi: 10.1111/jpy.12557. Epub 2017 Jul 18.
Studies of the colonization and spread of invasive species improves our understanding of key concepts in population biology as well as informs control and prevention efforts. The characean green alga Nitellopsis obtusa (starry stonewort) is rare in its native Eurasian range but listed by the United States Geological Survey (USGS) as an aggressive invasive in North America. First documented in North America in 1978 from New York, United States, it has since been reported from numerous inland lakes from Minnesota to Vermont, and from Lake Ontario and inland lakes in southern Ontario, Canada. While the ecological impacts of N. obtusa are not clearly understood in its invasive range, initial results show negative environmental effects. We have discovered a liquid-preserved herbarium specimen that predates the 1978 records by at least 4 years, and is the first confirmed record of N. obtusa in Québec.
对入侵物种的定殖和扩散进行研究，有助于我们更好地理解种群生物学中的关键概念，并为控制和预防工作提供信息。轮藻属的钝节拟丽藻（星状轮藻）在其原生的欧亚分布范围内较为罕见，但被美国地质调查局（USGS）列为北美洲的一种具有侵略性的入侵物种。1978年首次在美国纽约被记录于北美洲，此后在从明尼苏达州到佛蒙特州的众多内陆湖泊，以及加拿大安大略湖和安大略省南部的内陆湖泊中均有报道。虽然钝节拟丽藻在其入侵范围内的生态影响尚不清楚，但初步结果显示出负面的环境影响。我们发现了一份保存在液体中的植物标本，其年代比1978年的记录至少早4年，这是钝节拟丽藻在魁北克的首个经确认的记录。
