Reef habitats structure symbiotic microalgal assemblages in corals and contribute to differential heat stress responses

Reef habitats structure symbiotic microalgal assemblages in corals and contribute to differential heat stress responses
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珊瑚礁栖息地在珊瑚中构建共生微藻群落,并导致不同的热应激反应

DOI:
10.1007/s00338-022-02316-w
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发表时间:
2023
期刊:
影响因子:
3.5
通讯作者:
Strader, Marie E.
Strader, Marie E.
中科院分区:
生物学2区
文献类型:
--
作者:
Leinbach, Sarah E.;Speare, Kelly E.;Strader, Marie E.

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与珊瑚相关的微生物共生体,特别是来自共生体科的鞭毛藻,在珊瑚从海洋热浪和大规模白化事件中生存和恢复的能力中起着重要作用。然而,关于微藻内共生群落在长时间热胁迫期间和之后在小空间尺度上的原位转移程度的数据仍然有限,这可能限制了共生群落作为恢复工具的改变。2019年,法属波利尼西亚的莫奥利亚岛经历了大规模的热异常,伴随着广泛的珊瑚白化和死亡。利用ITS2扩增子测序,我们评估了微藻组合解释风信子acropora hyacinthus在珊瑚礁生境之间的热耐受性和恢复动态变化的可能性。我们的数据显示了灵活性。风信子共生体的关联,但表明这些关联与热应激反应和殖民地居住的珊瑚礁栖息地密切相关,表明当地环境在塑造好客的共生体群落中起着突出作用,因此,全息生物的耐热性。值得注意的是,在白化事件期间和之后,抗白化菌落总是由共生菌主导。虽然我们没有检测到共生群落在从热胁迫中恢复期间的时间变化,但这一新的观察结果表明。风信子素与共生菌的关联表明,热应激可能促进了这种转变。此外,我们确定共生体类型概况,是潜在的诊断漂白敏感性。我们的发现阐明了这个物种和位置的共生灵活性的程度,对快速变化的海洋中珊瑚礁的恢复和管理具有重要意义。
Coral-associated microbial symbionts, particularly dinoflagellates from the family Symbiodiniaceae, play a significant role in corals’ ability to survive and recover from marine heatwaves and mass bleaching events. Yet, there remain limited data on the extent to which microalgal endosymbiont associations shift in situ during and after prolonged heat stress and over small spatial scales, potentially limiting the alteration of symbiont communities as a restoration tool. In 2019, Mo’orea, French Polynesia experienced a massive thermal anomaly accompanied by widespread coral bleaching and mortality. Using ITS2 amplicon sequencing, we assessed the possibility of microalgal assemblages explaining the observed variability inAcropora hyacinthusthermal tolerance and recovery dynamics between reef habitats. Our data reveal flexibility inA. hyacinthussymbiont associations, but show that these associations were strongly linked to both heat stress response and the reef habitat in which the colony resided, indicating a prominent role of local environments in shaping in hospite symbiont communities and, consequently, holobiont thermal tolerance. Notably, bleaching resistant colonies were invariably dominated bySymbiodiniumduring and after the bleaching event.Although we did not detect temporal changes in symbiont communities during recovery from thermal stress, this novel observation ofA. hyacinthusin association withSymbiodiniumsuggests that heat stress may have facilitated a shift. Further, we identify symbiont type profiles that are potentially diagnostic of bleaching susceptibility. Our findings illuminate the extent of symbiont flexibility for this species and location, with important implications for coral reef recovery and management in a rapidly changing ocean.
DOI: 10.2307/1543084
发表时间: 2001-02-01
影响因子: 1.6
作者:
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发表时间: 2018-12-03
期刊: PEERJ
影响因子: 2.7
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大堡礁南部热应激事件期间和之后珊瑚-内共生体关联的稳定性
DOI: 10.1007/s00338-009-0509-5
发表时间: 2009
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影响因子: 3.5
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