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首页> 外文期刊>Polar biology >A new species of the cheilostome bryozoan Chiastosella in the Southern Ocean, past and present
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A new species of the cheilostome bryozoan Chiastosella in the Southern Ocean, past and present

机译：过去和现在的一种新物种，位于南大洋的螯龙虾属苔藓Chiastosella

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Understanding whether marine calcifying organisms may acclimatise to climate change is important with regard to their survival over the coming century. Due to cold waters having a naturally higher CO_2 uptake, the Southern Ocean provides an especially good opportunity to study the potential impact of climate change. In 2011, a new cheilostome bryozoan species-Chiastosella ettorina sp. nov.-was dredged from Burdwood Bank, Southern Ocean, at 324-219-m depth during the Nathaniel B Palmer Cruise. This species had previously been collected in 1902 from the same area at 100-m depth, but was incorrectly identified as Chiastosella watersi, an encrusting species from New Zealand. The availability of samples of the same species, from the same general location, but collected 109 years apart allowed us to investigate morphological modifications potentially arising from environmental changes. We found a significant difference in zooid size, with the oldest and shallowest specimens having smaller zooids than the recently collected deeper specimens. This difference in zooid size appears to be unrelated to known sources of environmental variation such as temperature and salinity, and it could represent the extremes of the zooid size range of C. ettorina. An alternative explanation is that acidifying waters may have caused zooids to grow more slowly, resulting in a final larger size.
机译：了解海洋钙化生物是否可以适应气候变化对于其在下一世纪的生存至关重要。由于冷水自然具有较高的CO_2吸收量，因此南大洋为研究气候变化的潜在影响提供了一个特别好的机会。在2011年，一个新的螯龙科苔藓动物种-Chiastosella ettorina sp.。在Nathaniel B Palmer巡游期间，Nov。从南洋Burdwood Bank挖出了324-219米的深度。该物种以前是在1902年从同一区域以100米深的地方收集的，但被错误地鉴定为水生Chiastosella watersi，这是一种来自新西兰的结壳物种。可从相同的大致地点获得相同物种的样本，但相距109年，因此我们可以研究可能因环境变化而引起的形态学变化。我们发现动物区系的大小存在显着差异，最古老和最浅的标本具有比最近收集的更深的标本更小的动物区系。动物区系大小的这种差异似乎与环境变化的已知来源（例如温度和盐度）无关，并且它可能代表埃克托纳梭菌的动物区系大小范围的极端值。另一种解释是，酸化水可能会使动物类动物生长得更慢，最终导致更大的尺寸。

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