Since its introduction from North America in the 1970s, the American razor clam Ensis leei (M. Huber, 2015) has successfully spread throughout North Sea coasts from Spain to Norway and the United Kingdom to the western Baltic. We investigated the distribution and abundance of this non-indigenous bivalve species as a potential novel food resource for common scoter Melanitta nigra (Linnaeus, 1758) along the eastern German North Sea coast. Highest densities of flightless moulting and wintering common scoters coincided with areas of high E. leei abundance. Other European studies showed common scoters extensively feed on E. leei. Even with these findings, it remains difficult to demonstrate convincingly that E. leei constitutes a major food source for common scoter in the German North Sea during their non-breeding season. However, our study suggests that E. leei has become an important prey item for internationally important concentrations of common scoters at large spatial scales.

中文翻译：

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入侵的双壳类动物显然为海底牡蛎蜕皮和越冬提供了新的食物来源

自从1970年代从北美引进以来，美国剃刀c恩西斯雷伊（M. Huber，2015）已​​成功地从西班牙到挪威，英国和波罗的海西部遍及北海沿岸。我们调查了这种非本土的双壳类动物的分布和丰富度，将其作为德国北海东部沿海常见的黑点Melanitta nigra（Linnaeus，1758）的潜在新食物资源。不能飞行的蜕皮和越冬的普通苏格兰羊的最高密度与大肠埃希菌丰富的地区相吻合。欧洲的其他研究表明，普通苏格兰人广泛食用雷氏大肠杆菌。即使有了这些发现，仍然很难令人信服地证明大肠埃希氏菌是德国北海非繁殖季节普通的主要食物来源。然而，