Ilyanassa obsoleta 对水温的不同存活率以及与非本地红藻 Gracilaria vermiculophylla 的联系

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Timothy S. Lee, Amy E. Fowler, Jessica R. Largen, Jonathan P. Russo, Zackary J. Schlegel, Dawson K. Wright, April M. H. Blakeslee
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引用次数: 0

摘要

在美国东海岸,广泛分布的非本地红藻蛭石藻(Gracilaria vermiculophylla)为一系列大型无脊椎动物提供了栖息地,其中包括东部泥螺(Ilyanassa obsoleta)。虽然 I. obsoleta 的耐温范围很广,但夏季水温升高可能会增加其死亡率;此外,海水温度升高时出现的非本地藻类可能会加剧有害情况。我们测试了 G. vermiculophylla 的存在与否如何在 3 周的夏季温度范围内影响蜗牛的死亡率。我们发现,I. obsoleta在最低温度(27 °C)下存活时间最长,其次是中等温度(32 °C),最后是最高温度(36 °C),所有蜗牛都在两天内死亡。有 G. vermiculophylla 存在和没有 G. vermiculophylla 存在时,蜗牛的死亡率也更高更快。我们怀疑蛭藻在较高温度下溶解氧会变得很低;因此我们在实验室进行了溶解氧实验。我们发现,在最高温度处理下,蛭藻降解和氧气减少的速度更快,从而造成缺氧条件。总之,我们的研究结果表明,蛭藻在夏季高温条件下会加剧缺氧状况,从而可能导致动物死亡率上升。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Differential survival of Ilyanassa obsoleta to water temperature and association with the non-native red alga Gracilaria vermiculophylla

Differential survival of Ilyanassa obsoleta to water temperature and association with the non-native red alga Gracilaria vermiculophylla

Along the U.S. east coast, the widespread non-native red alga Gracilaria vermiculophylla provides habitat for an array of macroinvertebrates, including the eastern mudsnail Ilyanassa obsoleta. Though I. obsoleta tolerates a wide temperature range, increases in summer water temperatures may enhance mortality; furthermore, the presence of non-native algae in rising seawater temperatures could exacerbate harmful conditions. We tested how the presence or absence of G. vermiculophylla influenced snail mortality across a range of summer temperatures over a 3-week period. We found that I. obsoleta survived the longest in the lowest temperature (27 °C), followed by the medium (32 °C), and lastly the highest (36 °C) where all snails died within 2 days. Mortality was also higher and faster for snails in the presence versus absence of G. vermiculophylla. We suspected dissolved oxygen became very low at the higher temperatures with G. vermiculophylla; thus we conducted a laboratory-based dissolved oxygen experiment. We found that G. vermiculophylla degraded and oxygen declined faster at the highest temperature treatment, thereby creating anoxic conditions. Altogether, our results demonstrate that G. vermiculophylla could enhance anoxic conditions at high summer temperatures, potentially leading to enhanced faunal mortality.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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