The species richness and cell abundance of Chaetoceros were characterized by a typical seasonal pattern.
角毛藻的种类丰富度和细胞丰度具有典型的季节性特征。
Analysts said the drop reflected a seasonal pattern, not a general trend.
分析人士认为,这种下降反应了季节特征,并非总的趋势。
The spider community also showed a strong seasonal pattern that was affected by flooding and insecticide sprays.
蜘蛛的群落具有很强的季节性,受洪水以及杀虫剂的影响。
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