Department of Functional Biology, University of Oviedo, C/ Julian Claveria s/n, 33006 Oviedo, Spain.
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, AWI, Department of Coastal Ecology, Germany.
Mar Pollut Bull. 2021 Feb;163:111935. doi: 10.1016/j.marpolbul.2020.111935. Epub 2020 Dec 24.
In marine settings, anthropogenic disturbances and climate change increase the rate of biological invasions. Predicting still undescribed invasive alien species (IAS) is needed for preparing timely management responses. We tested a strategy for discovering new potential IAS using DNA in a trans-equatorial expedition onboard RV Polarstern. During one-month travel, species inside ballast water experienced oxygen depletion, warming, darkness and ammonium stress. Many organisms died but several phytoplankton and zooplankton survivors resisted and were detected through a robust combination of individual sampling, DNA barcoding and metabarcoding, new in ballast water studies. Ammonium was identified as an important influential factor to explain diversity changes in phytoplankton and zooplankton. Some species reproduced until the end of the travel. These species tolerant to travel stress could be targeted as potential IAS and prioritized for designing control measures. Introducing resistance to travel stress in biosecurity risk analysis would be recommended.
在海洋环境中，人为干扰和气候变化增加了生物入侵的速度。为了及时采取管理措施，有必要预测尚未描述的外来入侵物种（IAS）。我们在 RV Polarstern 号上进行了一项跨赤道考察，利用 DNA 测试了一种发现新潜在 IAS 的策略。在为期一个月的旅行中，压载水中的物种经历了缺氧、升温、黑暗和铵胁迫。许多生物死亡，但一些浮游植物和浮游动物幸存者抵抗了下来，并通过个体采样、DNA 条形码和代谢组学的强大组合被检测到，这在压载水研究中是新的。铵被确定为解释浮游植物和浮游动物多样性变化的重要影响因素。一些物种繁殖到旅行结束。这些对旅行压力有耐受性的物种可能被视为潜在的 IAS，并优先考虑设计控制措施。建议在生物安全风险分析中引入对旅行压力的抗性。
