Physiological and biogeochemical traits of bleaching and recovery in the mounding species of coral Porites lobata: implications for resilience in mounding corals.
Physiological and biogeochemical traits of bleaching and recovery in the mounding species of coral Porites lobata: implications for resilience in mounding corals.
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DOI：
10.1371/journal.pone.0063267
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Matsui Y
中科院分区：
文献类型：
--
作者：
Levas SJ;Grottoli AG;Hughes A;Osburn CL;Matsui Y
堆积珊瑚比分支珊瑚在漂白事件中存活的数量更多。然而，迄今为止，还没有研究确定了潜在的生理和生物地球化学特征，负责堆积珊瑚holobiont恢复漂白。此外，溶解有机碳（DOC）作为漂白珊瑚固定碳来源的潜力从未被确定。在这里，Porites lobata珊瑚被实验性地漂白了23天，然后允许恢复0，1，5和11个月。在每个恢复间隔，进行一系列分析以评估其恢复（光合作用、呼吸作用、叶绿素a、能量储备、组织生物量、钙化、骨骼的δ 13 C、动物宿主和内共生体组分的δ 13 C和δ 15 N）。此外，在0个月的恢复，光合作用获得和动物饲养获得的碳同化到动物宿主，内共生体，骨架，珊瑚介导的DOC通过13 C-脉冲追踪标记测量。在恢复的第一个月，能量储备和漂白珊瑚的组织生物量保持尽管减少叶绿素a，光合作用，光合固定碳的同化。与此同时，裂叶珊瑚分解代谢从浮游动物获得的碳，并似乎采取DOC作为固定碳的来源。所有受漂白负面影响的变量在5至11个月内恢复。因此，在土堆珊瑚P. lobata漂白弹性驱动的能力，积极分解动物浮游生物获得的碳，似乎利用DOC作为一个重要的固定碳源，促进能源储备和组织生物量的维护。随着漂白事件的频率和强度预计将在下一个世纪增加，未来珊瑚礁上的珊瑚多样性可能不仅有利于隆起的形态，而且有利于像P. lobata这样的物种，它们有能力利用固定碳的异养来源，最大限度地减少漂白的影响，促进快速恢复。
Mounding corals survive bleaching events in greater numbers than branching corals. However, no study to date has determined the underlying physiological and biogeochemical trait(s) that are responsible for mounding coral holobiont resilience to bleaching. Furthermore, the potential of dissolved organic carbon (DOC) as a source of fixed carbon to bleached corals has never been determined. Here, Porites lobata corals were experimentally bleached for 23 days and then allowed to recover for 0, 1, 5, and 11 months. At each recovery interval a suite of analyses were performed to assess their recovery (photosynthesis, respiration, chlorophyll a, energy reserves, tissue biomass, calcification, δ13C of the skeletal, δ13C, and δ15N of the animal host and endosymbiont fractions). Furthermore, at 0 months of recovery, the assimilation of photosynthetically acquired and zooplankton-feeding acquired carbon into the animal host, endosymbiont, skeleton, and coral-mediated DOC were measured via 13C-pulse-chase labeling. During the first month of recovery, energy reserves and tissue biomass in bleached corals were maintained despite reductions in chlorophyll a, photosynthesis, and the assimilation of photosynthetically fixed carbon. At the same time, P. lobata corals catabolized carbon acquired from zooplankton and seemed to take up DOC as a source of fixed carbon. All variables that were negatively affected by bleaching recovered within 5 to 11 months. Thus, bleaching resilience in the mounding coral P. lobata is driven by its ability to actively catabolize zooplankton-acquired carbon and seemingly utilize DOC as a significant fixed carbon source, facilitating the maintenance of energy reserves and tissue biomass. With the frequency and intensity of bleaching events expected to increase over the next century, coral diversity on future reefs may favor not only mounding morphologies but species like P. lobata, which have the ability to utilize heterotrophic sources of fixed carbon that minimize the impact of bleaching and promote fast recovery.
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影响因子：
4.5
作者：
Fitt, WK;McFarland, FK;Chilcoat, GC
通讯作者：
Chilcoat, GC
影响因子：
2.4
作者：
COLES, SL;JOKIEL, PL
通讯作者：
JOKIEL, PL
影响因子：
2.5
作者：
Ferrier-Pages, C;Gattuso, JP;Allemand, D
通讯作者：
Allemand, D
共生珊瑚的种群控制
影响因子：
10.1
作者：
FALKOWSKI, PG;DUBINSKY, Z;MCCLOSKEY, L
通讯作者：
MCCLOSKEY, L
影响因子：
5
作者：
Grottoli, AG
通讯作者：
Grottoli, AG