28174
The total nuclear abnormalities - as recorded in Fallacia pygmaea and N . novaesiberica - were significantly higher in the treatment microcosms ; whereas in N . palea , the dominant species in treatment microcosms , neither nuclear alterations nor abnormal frustules were observed .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None