Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan
Improvement in recruitment of Japanese sardine with delays of the spring phytoplankton bloom in the Sea of Japan
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DOI：
10.1111/fog.12252
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发表时间：
2018-07
影响因子：
2.6
通讯作者：
T. Kodama;T. Wagawa;S. Ohshimo;H. Morimoto;N. Iguchi;K. Fukudome;T. Goto;Motomitsu Takahashi;T. Yasuda
中科院分区：
文献类型：
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作者：
T. Kodama;T. Wagawa;S. Ohshimo;H. Morimoto;N. Iguchi;K. Fukudome;T. Goto;Motomitsu Takahashi;T. Yasuda
为了评估初级生产力的时间变化对日本海沙丁鱼（Sardinops melanostictus）补充的影响，从1998年1月至2015年12月的8天多卫星（SeaWiFS，MODIS‐Aqua，MERIS和VIIRS）得出的海面叶绿素（SSCh l）浓度估计了海面浮游植物丰度的物候。由于SSChla和原位叶绿素浓度之间的关系在基于所使用的卫星组合的时期之间存在显著差异，1年的最大和最小SSChla浓度分别相对化为1和0。利用经验正交函数分析确定了相对化SSChlacconcentrations的时空变化。第一模态的数值反映了日本海SST浓度的流域尺度变化，2月下旬至5月下旬的主峰显示了春季水华。沙丁鱼的招聘每产卵（LNRPS）的对数是积极的影响春季浮游植物水华的开始和结束日期的延迟。最低海面温度日期的延迟导致1998-2015年期间春季水华结束的延迟，并在1982-2015年期间提高了LNRPS。沙丁鱼产卵在南部的日本海从4月至5月，因此，春季开花的延迟延长其重叠与沙丁鱼幼虫期，从而提高了日本沙丁鱼在日本海的招聘。
To evaluate the impact of temporal variation of primary productivity on the recruitment of Japanese sardine (Sardinops melanostictus) in the Sea of Japan, the phenology of sea surface phytoplankton abundance was estimated from 8 day multiple satellite (SeaWiFS, MODIS‐Aqua, MERIS, and VIIRS) derived sea surface chlorophyll (SSChl)aconcentrations from January 1998 to December 2015. Because relationships between SSChlaand in situ chlorophyllaconcentrations were significantly different among periods based on the satellite combinations used, maximum and minimum SSChlaconcentrations of 1 year were relativized as 1 and 0, respectively. Spatio‐temporal variation of relativized SSChlaconcentrations was determined by using empirical orthogonal function (EOF) analysis. Scores in the first EOF mode denoted the basin‐scale variations of SSChlaconcentrations in the Sea of Japan, and the major peak from the end of February to the end of May displayed the spring bloom. The logarithm of recruitment per spawner (LNRPS) for sardine was positively affected by delays in the start and end dates of the spring phytoplankton bloom. The delay of the date of the lowest sea surface temperature contributed to the delay of the end of the spring bloom during the period 1998–2015 and elevated the LNRPS during the period 1982–2015. Sardine spawns in the southern Sea of Japan from April to May, hence, delays of the spring bloom prolonged its overlap with sardine larval periods, and thus improved the recruitment of Japanese sardine in the Sea of Japan.