Food supply and seawater pCO2 impact calcification and internal shell dissolution in the blue mussel Mytilus edulis.
Food supply and seawater pCO2 impact calcification and internal shell dissolution in the blue mussel Mytilus edulis.
复制标题
食物供应和海水PCO2冲击钙化和内壳的内部壳溶解。
DOI：
10.1371/journal.pone.0024223
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Gutowska MA
中科院分区：
文献类型：
--
作者：
Melzner F;Stange P;Trübenbach K;Thomsen J;Casties I;Panknin U;Gorb SN;Gutowska MA
人为二氧化碳排放导致的海洋逐渐酸化将改变海洋生态系统过程。钙化生物可能特别容易受到海洋碳酸盐系统形态变化的影响。虽然以前的研究工作主要集中在碳酸钙饱和的海水中贝壳的外部溶解，但内部贝壳界面可能更容易受到酸化的影响。就蓝贻贝而言，高体液 pCO2 会导致与内壳表面直接接触的外液中 pH 值较低和碳酸盐浓度较低。为了测试海水 pCO2 升高是否会影响钙化和内壳表面完整性，我们在冬季 (5°C) 将波罗的海食用藻暴露于四种不同的海水 pCO2（39、142、240、405 Pa）和两种食用藻类（310–350 细胞 mL−1 与 1600–2000 细胞 mL−1）浓度下七周。我们发现，低食用藻类浓度和高 pCO2 值均显着降低了壳长度的生长。在高食物组的两个最高 pCO2 处理中，通过立体显微镜和 SEM 记录了珠光（ = 文石）层的内壳表面腐蚀，而在低食物组的所有处理中都发现了这种情况。食物和 pCO2 这两个因素都显着影响内壳表面溶解的程度。我们的研究结果首次表明，在二氧化碳胁迫条件下，内壳表面的完整性与动物的能量预算紧密相关。在食物有限的条件下，能量很可能被分配到更重要的过程（例如体细胞的维持），而不是外壳保护。从我们的结果可以明显看出，贻贝对其内壳表面的结构完整性发挥着重要的生物控制作用。
Progressive ocean acidification due to anthropogenic CO2 emissions will alter marine ecosytem processes. Calcifying organisms might be particularly vulnerable to these alterations in the speciation of the marine carbonate system. While previous research efforts have mainly focused on external dissolution of shells in seawater under saturated with respect to calcium carbonate, the internal shell interface might be more vulnerable to acidification. In the case of the blue mussel Mytilus edulis, high body fluid pCO2 causes low pH and low carbonate concentrations in the extrapallial fluid, which is in direct contact with the inner shell surface. In order to test whether elevated seawater pCO2 impacts calcification and inner shell surface integrity we exposed Baltic M. edulis to four different seawater pCO2 (39, 142, 240, 405 Pa) and two food algae (310–350 cells mL−1 vs. 1600–2000 cells mL−1) concentrations for a period of seven weeks during winter (5°C). We found that low food algae concentrations and high pCO2 values each significantly decreased shell length growth. Internal shell surface corrosion of nacreous ( = aragonite) layers was documented via stereomicroscopy and SEM at the two highest pCO2 treatments in the high food group, while it was found in all treatments in the low food group. Both factors, food and pCO2, significantly influenced the magnitude of inner shell surface dissolution. Our findings illustrate for the first time that integrity of inner shell surfaces is tightly coupled to the animals' energy budget under conditions of CO2 stress. It is likely that under food limited conditions, energy is allocated to more vital processes (e.g. somatic mass maintenance) instead of shell conservation. It is evident from our results that mussels exert significant biological control over the structural integrity of their inner shell surfaces.
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影响因子：
2.5
作者：
Beniash, Elia;Ivanina, Anna;Sokolova, Inna M.
通讯作者：
Sokolova, Inna M.
影响因子：
2.8
作者：
Doney, Scott C.;Balch, William M.;Feely, Richard A.
通讯作者：
Feely, Richard A.
影响因子：
2.4
作者：
Kadar, Eniko;Lobo-da-Cunha, Alexandre;Azevedo, Carlos
通讯作者：
Azevedo, Carlos
影响因子：
56.9
作者：
Checkley, David M., Jr.;Dickson, Andrew G.;Asch, Rebecca
通讯作者：
Asch, Rebecca
DOI：
10.1016/0022-0981(82)90008-9
发表时间：
1982-01-01
影响因子：
2
作者：
JOKUMSEN, A;FYHN, HJ
通讯作者：
FYHN, HJ