Nutrient status of Otsuchi Bay (northeastern Japan) following the 2011 off the Pacific coast of Tohoku Earthquake.
Nutrient status of Otsuchi Bay (northeastern Japan) following the 2011 off the Pacific coast of Tohoku Earthquake.
复制标题
2011 年东北地震太平洋沿岸后大槌湾（日本东北部）的营养状况。
DOI：
10.1007/s10872-015-0296-2
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发表时间：
2016
影响因子：
2.3
通讯作者：
Toshi Nagata
中科院分区：
文献类型：
--
作者：
Hideki Fukuda;Ryosuke Katayama;Yanhui Yang;Hiroyuki Takasu;Yuichiro Nishibe;Atsushi Tsuda;Toshi Nagata
2011年3月11日，日本三陆海岸遭受了与2011年太平洋沿岸东北地震有关的大规模海啸袭击。海啸对底部沉积物造成了巨大的扰动，并严重破坏了人造结构、自然景观和污水处理系统和水产养殖设施等基础设施。一个严重和持续的关切是受影响区域营养状况的根本改变，这可能对生态系统恢复和渔业重建进程产生深远影响。我们调查了大槌湾水柱的营养状况，这是一个被海啸严重破坏的小海湾。我们在2011年5月至2014年7月期间收集的数据揭示了营养参数中的一些突出特征，这些特征可能与海啸的影响有关。这些特征包括：(1)2011年9月前高浊度、高浓度亚硝酸盐和硅酸；(2)2011年11月至2012年1月混合期海水扩散特征为高磷酸盐浓度、低总无机氮（铵态氮+硝酸盐+亚硝酸盐）与磷酸盐（TIN/P）比；(3)随后年份混合期TIN/P比增加，高于地震前。这些数据不仅为地震后大池湾营养物状况的变化和随后的恢复提供了证据，而且还表明海啸可能导致营养物化学计量的变化，这种变化似乎至少持续到2014年初。
On 11 March 2011, the Sanriku coast of Japan was struck by a massive tsunami associated with the 2011 off the Pacific coast of Tohoku Earthquake. The tsunami caused large disturbances in bottom sediments and severe destruction of human-made structures, natural landscapes and infrastructures such as sewage treatment systems and aquaculture facilities. A serious and continuing concern is a fundamental alteration of the nutrient regime in the impacted regions, which may exert a profound influence on the processes of ecosystem recovery and fishery reconstruction. We investigated the nutrient status of the water column of Otsuchi Bay, a small embayment that was heavily damaged by the tsunami. Our data collected between May 2011 and July 2014 revealed some prominent features in nutrient parameters that were potentially linked to effects of the tsunami. These features include (1) high turbidity and high concentrations of nitrite and silicic acid until September 2011, (2) the spread of seawater characterized by high phosphate concentration and low total inorganic nitrogen (ammonium + nitrate + nitrite) to phosphate (TIN/P) ratio during the mixing period between November 2011 and January 2012, and (3) an increase in the TIN/P ratio during the mixing period of subsequent years to become higher than it was before the earthquake. These data not only provide evidence of the alteration and subsequent recovery of the nutrient status of Otsuchi Bay after the earthquake but also suggest a possible tsunami-induced alteration in nutrient stoichiometry which appeared to last until at least the beginning of 2014.