沿海地区出现的“赤潮”从种群数量变动角度看是属于（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29863' and id < 2422510 and id<>'2422510' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29863' and id > 2422510 and id<>'2422510' order by id asc limit 5