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首页> 外文期刊>Marine ecology >The influence of hypo-osmotic stress on the regenerative capacity of the invasive polychaete Marenzelleria viridis from its native range
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The influence of hypo-osmotic stress on the regenerative capacity of the invasive polychaete Marenzelleria viridis from its native range

机译：低渗透胁迫对原生境下入侵多毛Marenzelleria viridis再生能力的影响

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摘要

The euryhaline polychaete Marenzelleria viridis is a notorious invader of the Baltic region and while many studies have focused on the effects of osmotic stress on larval development of the species, few have assessed its effect on adult specimens. This study investigated the effects of low salinity on the physiology of M.viridis by using its regenerative capacity as a proxy for physiologic performance. Specimens were collected in spring 2015 on sandy flats in Hempstead Bay (Long Island, New York), a site that falls within its native range. Worms were ablated between the 14th and 20th chaetigers and cultured at five different salinity treatments (24psu, 15psu, 10psu, 5psu and 0psu) that reflected the broad salinity regimes of its distributional range. Data for anterior regeneration were analysed and presented. Morphogenesis during anterior regeneration was characterized by the formation of a blastema from which the major anatomic structures emerged. All specimens cultured at 5–24psu successfully completed regeneration whereas 75% of specimens cultured at 0psu died and the survivors were unable to proceed beyond the blastema stage. Salinity did not have an effect on regeneration time (14.5–15.1days) but did have an effect on the percentage of chaetigers regenerated (lowest – 77% at 5psu, highest – 97.5% at 15‰). The post-regeneration phase was characterized by variability in pigmentation patterns in the regenerated anterior structures, which appear to be independent of salinity treatments. In conclusion, adult M.viridis appears to exhibit high tolerance to low salinity environments, which may have been inherited from its larval stages. In addition, the different pigmentation patterns observed in regenerated structures may allude to the variability of this feature in spionids.
机译：euryhaline polychaete marenzelleria viridis是波罗的海地区一个臭名昭著的入侵者，尽管许多研究集中于渗透胁迫对该物种幼体发育的影响，但很少有人评估其对成年标本的影响。这项研究通过利用其再生能力作为生理表现的代名词，研究了低盐度对维尔纽斯生理的影响。标本于2015年春季在汉普斯特德湾（纽约州长岛）的一个沙质平地上采集，该地点位于其本国范围内。在第14和第20牧羊人之间消灭了蠕虫，并在五种不同的盐度处理下进行了培养（24psu，15psu，10psu，5psu和0psu），这反映了其分布范围内的广泛盐度制度。分析并显示了前路再生的数据。前部再生过程中的形态发生特征是胚泡的形成，主要的解剖结构从胚泡中出现。所有在5psu至24psu培养的标本均成功完成了再生，而在0psu培养的标本中有75％死亡，幸存者无法继续进入胚泡阶段。盐度对再生时间（14.5-15.1天）没有影响，但对再生的象豹的百分比有影响（最低– 5psu时为77％，最高– 15‰时为97.5％）。再生后阶段的特征是再生的前部结构中色素沉着模式的变化，这似乎与盐度处理无关。总之，成年M.viridis似乎表现出对低盐度环境的高度耐受性，这可能是从其幼体阶段遗传而来的。另外，在再生结构中观察到的不同的色素沉着模式可能暗示了该特征在变异体中的可变性。

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