Local Adaptation Signatures in Thermal Performance of the Temperate Coral Astrangia poculata
Local Adaptation Signatures in Thermal Performance of the Temperate Coral Astrangia poculata
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温带珊瑚 Astrangia poculata 热性能的局部适应特征
DOI：
10.25777/shdq-af84
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发表时间：
2018
影响因子：
8.7
通讯作者：
Hannah E. Aichelman
中科院分区：
文献类型：
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作者：
Hannah E. Aichelman
在热性能的膨胀适应性签名的珊瑚Astrangia POCULATA汉娜Elise Aichelman老自治领大学，2018年主任：博士丹尼尔J. Barshis的北方星星珊瑚（Astrangia poculata）是一种未充分研究的温带石珊瑚，提供了独特的机会，了解表型可塑性和局部适应性在珊瑚生理耐受极限的作用。Astrangia poculata栖息在从大西洋西北部到墨西哥湾的硬底生态系统中，并能承受高达20°C的年温度范围。此外，还发现了A. poculata是兼性共生的，并且在共生（“棕色”）和非共生（“白色”）状态下共同出现。在这里，棕色和白色A。poculata从美国弗吉尼亚州（VA）和罗得岛（RI）收集，并暴露于热（18-32 ℃）和冷（18-6 ℃）温度测定，在此期间测量光合作用（P）、呼吸作用（R）和共生体光化学效率（Fv/Fm）。热性能曲线（TPC）的呼吸显示的差异与当地的适应RI和VA人口纳塔尔的热环境。RI珊瑚总体上表现出更高的呼吸速率，并且在6、15、18、22和26°C下表现出更高的呼吸速率。此外，热最适（Topt）分析显示，VA种群的Topt分别高出3.76°C（棕色）和6.88°C（白色），这与VA的原位热环境较暖相对应。与呼吸作用相反，在光合速率或Fv/Fm中没有检测到起源效应，这表明可能仅宿主的局部适应特征。本研究是首次考虑A. poculata的反应，热和冷应力共生国家和地理，并提供了深入了解未来气候变化的影响，宝贵的硬底社区沿着美国东海岸。
LOCAL ADAPTATION SIGNATURES IN THERMAL PERFORMANCE OF THE TEMPERATE CORAL ASTRANGIA POCULATA Hannah Elise Aichelman Old Dominion University, 2018 Director: Dr. Daniel J. Barshis The Northern Star Coral (Astrangia poculata) is an understudied temperate scleractinian coral that provides unique opportunities to understand the roles of phenotypic plasticity and local adaptation in coral physiological tolerance limits. Astrangia poculata inhabits hard bottom ecosystems from the northwestern Atlantic to the Gulf of Mexico and withstands an annual temperature range up to 20°C. Additionally, A. poculata is facultatively symbiotic and co-occurs in both symbiotic (“brown”) and aposymbiotic (“white”) states. Here, brown and white A. poculata were collected from Virginia (VA) and Rhode Island (RI), USA and exposed to heat (18-32°C) and cold (18-6°C) temperature assays during which photosynthesis (P), respiration (R), and symbiont photochemical efficiency (Fv/Fm) were measured. Thermal performance curves (TPCs) of respiration revealed differences consistent with local adaptation of the RI and VA populations to their natal thermal environments. RI corals exhibited higher respiration rates overall, and higher respiration at 6, 15, 18, 22, and 26°C. Additionally, thermal optimum (Topt) analyses show a 3.76°C (brown) and 6.88°C (white) greater Topt in the VA population, corresponding to the warmer in situ thermal environment in VA. In contrast to respiration, no origin effect was detected in photosynthesis rates or Fv/Fm, suggesting a possible host-only signature of local adaptation. This study is the first to consider A. poculata’s response to both heat and cold stress across symbiotic states and geography and provides insight into the effects of future climate change on valuable hard bottom communities along the East Coast of the US.
影响因子：
30.7
作者：
Torda, Gergely;Donelson, Jennifer M.;Munday, Philip L.
通讯作者：
Munday, Philip L.
影响因子：
4.1
作者：
Putnam HM;Davidson JM;Gates RD
通讯作者：
Gates RD