Experimental assessment of organic carbon fluxes in the scleractinian coral Stylophora pistillata during a thermal and photo stress event
Experimental assessment of organic carbon fluxes in the scleractinian coral Stylophora pistillata during a thermal and photo stress event
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热和光应激事件期间石珊瑚 Stylophora pistillata 有机碳通量的实验评估
DOI：
10.3354/meps09640
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发表时间：
2012
影响因子：
2.5
通讯作者：
C. Ferrier‐Pagès
中科院分区：
文献类型：
--
作者：
P. Tremblay;M. Naumann;S. Sikorski;R. Grover;C. Ferrier‐Pagès
我们评估微微和nanoplankton放牧率以及溶解的游离氨基酸（DFAA）的吸收率的共生珊瑚Stylophora pistillata暴露于热和光应力伴随漂白。目的是确定这些类型的食物来源是否可以维持这种珊瑚物种的日常能量需求。此外，总有机碳（TOC）通量进行了测量，以量化体碳损失或增益。在控制条件下（27°C和200 μmol光子m−2 s−1），自养C的获取覆盖了非漂白珊瑚90%以上的呼吸需求。另外10.6%的呼吸需求由微微型和微型浮游生物的摄食来满足。总有机碳净通量率为负值，表明珊瑚大量吸收总有机碳。在压力（31°C和300 μmol光子m−2 s−1）之后，自养C对漂白珊瑚呼吸需求的贡献下降到64%。微微和纳米浮游生物放牧仅占2%和7%的呼吸需求期间和之后的压力，分别。这些研究结果表明，在这个物种的能源收购的自养和异养能力的重大压力引起的影响。虽然没有发生显着的变化，在DFAA的吸收速率，TOC通量方向的显着变化，观察到，这导致TOC净释放。因此，自养和异养在维持漂白和漂白S的呼吸需要方面效率较低。pistillata，这表明这种珊瑚物种，可能还有其他相关物种，可能会受到反复发生和广泛的漂白事件的严重威胁。
We assessed picoand nanoplankton grazing rates as well as dissolved free amino acid (DFAA) uptake rates by the symbiotic coral Stylophora pistillata exposed to thermal and photo stress with concomitant bleaching. The aim was to determine whether these types of food sources could maintain the daily energetic requirements of this coral species. Moreover, the total organic carbon (TOC) flux was measured to quantify bulk C loss or gain. Under control conditions (27°C and 200 μmol photons m−2 s−1), autotrophic C acquisition covered more than 90% of the respiratory needs of non-bleached corals. Another 10.6% of the respiratory needs were covered by picoand nanoplankton grazing. Net TOC flux rates were negative, indicating substantial TOC uptake by the corals. After the stress (31°C and 300 μmol photons m−2 s−1), the contribution of autotrophic C to the respiratory demand decreased to 64% in bleached corals. Picoand nano plankton grazing covered only 2 and 7% of the respiratory needs during and after the stress, respectively. These findings demonstrate a substantial stress-induced impact on autoand heterotrophic capacities for energy acquisition in this species. Although no significant change occurred in the DFAA uptake rates, a significant change in the TOC flux direction was observed, which resulted in TOC net release. Consequently, autotrophy and heterotrophy were less efficient in sustaining the respiratory needs of bleaching and bleached S. pistillata, suggesting that this coral species, and possibly other related species, can be severely endangered by reoccurring and widespread bleaching events.
影响因子：
4.5
作者：
L. Rodrigues;A. Grottoli
通讯作者：
L. Rodrigues;A. Grottoli
影响因子：
5.2
作者：
Anthony, Kenneth R. N.;Hoogenboom, Mia O.;Middlebrook, Rachael
通讯作者：
Middlebrook, Rachael
影响因子：
64.8
作者：
Grottoli, AG;Rodrigues, LJ;Palardy, JE
通讯作者：
Palardy, JE