Abstract：
Invasive species are the second main cause of biodiversity loss because of their exceptional ability to supplant native species by creating major upheavals in ecosystems. Inexpensive and prevalent time-lapse photography provides an exciting opportunity to better understand the aggressive behavior of invasive species including how they invade and conquer new territory. One of the most pervasive invasive species in the Eastern United States is Japanese stiltgrass, Microstegium vimineum (Trin.) A. Campus, which originated from Southeast Asia. Previous research has examined the conditions that enable Japanese stiltgrass to become invasive, but nothing is known regarding root and shoot behavior. Here time-lapse was used to examine Japanese stiltgrass seedlings, early in their development, as a first step to observe its behavior. Our results demonstrate that Japanese stiltgrass shoots appear to drop or collapse and then resurrect back to an upright stature - sometimes the same plant exhibits this behavior multiple times. We have shown, in addition, that emergent stilt root growth rate increases with increased root length. This and similar kinds of analyses may provide insight into how Japanese stiltgrass thrives aggressively in a non-native environment with the goal of developing better methods of controlling this noxious weed.
摘要：
入侵物种是生物多样性丧失的第二个主要原因，因为它们具有通过在生态系统中造成重大动荡来取代本地物种的特殊能力。廉价和普遍的延时摄影提供了一个令人兴奋的机会，以更好地了解入侵物种的攻击行为，包括他们如何入侵和征服新的领土。在美国东部最普遍的入侵物种之一是日本树干草，微病毒（Trin。)A.校园，起源于东南亚。先前的研究已经检查了使日本树干变得侵入性的条件，但是关于根和芽的行为一无所知。在这里，延时被用来检查日本干草苗，在他们发展的早期，作为观察其行为的第一步。我们的研究结果表明，日本的stiltgrass芽似乎下降或崩溃，然后复活回到直立的身材-有时同一植物多次表现出这种行为。我们已经证明,此外,苗头根的生长速率随着根长的增加而增加。这种分析和类似的分析可以深入了解日本干草草如何在非本地环境中蓬勃发展，目的是开发更好的控制这种有害杂草的方法。
