The invasive kelp Undaria pinnatifida: a prominent Asian food source spreading in European waters

入侵性海带裙带菜（Undaria pinnatifida）：在欧洲水域传播的重要亚洲食物来源

• 批准号: 269232491
• 负责人: Professor Dr. Kai Bischof
• 金额: --
• 依托单位: Key Laboratory of Experimental Marine Biology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/269232491?language=en
• 关键词: invasive; kelp; Undaria; pinnatifida; prominent

The Asian kelp Undaria pinnatifida represents a seaweed species, which is extensively cultivated as food source in Chinese coastal waters and plays an important role in human nutrition in China and Japan ("wakame" in Japan, "qundaicai" in Chinese). Undaria is usually raised in mariculture facilities, where environmental perturbation and potentially overstocking might reduce the annual yield. At the same time, outside its native distributional range U. pinnatifida represents a rapidly spreading invasive species, with the potential to outcompete the respective native marine flora. It´s northern distributional limit in European waters is currently at the Dutch coastline and a further spread into the German Bight is to be expected soon. By the cooperation of a Chinese and German research team, which are both renowned in the field of seaweed biology, new insights will be gained on this species of global significance: We will experimentally explore Undaria´s responses to changing environmental parameters (temperature, radiation and nutrients) and use this information to predict its capacity for future bioinvasion in European waters. In parallel this information will be implemented to improve aquaculture techniques in its native range. We will conduct coordinated experiments in the laboratories in Qingdao and Bremen studying housekeeping ecophysiological processes like photosynthesis, growth, reproduction on specimens from the Qingdao and the northernmost European population of Undaria. We will study the effect of environmental changes on important physiological/biochemical parameters like pigment and fatty acid composition, antioxidative potential, phlorotannin synthesis. In this study we will include all different life-history stages of Undaria. We will furthermore compare the genetic identity of the respective population at both sites applying state-of-the-art techniques in population genetics. Conclusively we will gain new insights into the mechanisms of range expansion, which at the same time will allow for better protection measures against the invader in European waters and potentially improve yield and allow for a more sustainable cultivation (i.e. by less fertilizer release) along the coast of China.

亚洲海带裙带菜（Undaria pinnatifida）是一种海藻物种，在中国沿海水域广泛栽培作为食物来源，在中国和日本的人类营养中发挥着重要作用（日本为“裙带菜”，中文为“群带菜”）。裙带菜通常在海水养殖设施中饲养，环境扰动和潜在的过度放养可能会降低年产量。与此同时，在其原生分布范围之外，U. pinnatifida 代表了一种快速传播的入侵物种，有可能超越各自的原生海洋植物群。它在欧洲水域的北部分布范围目前位于荷兰海岸线，预计很快会进一步扩散到德国湾。通过在海藻生物学领域享有盛誉的中国和德国研究团队的合作，将对这一具有全球意义的物种获得新的见解：我们将通过实验探索裙带菜对不断变化的环境参数（温度、辐射和营养物质）的反应，并利用这些信息来预测其未来对欧洲水域的生物入侵能力。与此同时，这些信息将用于改进其本土范围内的水产养殖技术。我们将在青岛和不莱梅的实验室进行协调实验，研究来自青岛和最北欧裙带菜种群的光合作用、生长、繁殖等管家生态生理过程。我们将研究环境变化对重要生理/生化参数的影响，如色素和脂肪酸组成、抗氧化潜力、叶皮单宁合成。在这项研究中，我们将包括裙带菜所有不同的生活史阶段。我们还将应用最先进的群体遗传学技术进一步比较两个地点各自群体的遗传特性。最终，我们将对范围扩大的机制获得新的见解，同时将有助于在欧洲水域采取更好的保护措施，抵御入侵者，并有可能提高产量，并允许在中国沿海进行更可持续的耕作（即通过减少化肥释放）。

项目成果

Genetic analysis of a recently established Undaria pinnatifida (Laminariales: Alariaceae) population in the northern Wadden Sea reveals close proximity between drifting thalli and the attached population

对瓦登海北部最近建立的裙带菜（海带目：Alariaceae）群体进行的遗传分析表明，漂流菌体与附着群体之间非常接近

• DOI: 10.1080/09670262.2018.1532116
• 发表时间: 2019-03
• 期刊: European Journal of Phycology
• 影响因子: 2.4
• 作者: Tifeng Shan;Shaojun Pang;Xuemei Wang;Jing Li;Li Su;Jessica Schiller;Dagmar Lackschewitz;Jason M. Hall Spencer;Kai Bischof
• 通讯作者: Kai Bischof