As shown in Figure 3 , the species obtained demonstrated an increasing trend followed by a declining trend as tree age grew, which showed the highest number in the young stand group (Y2) and the lowest in the mature stand group (M1).
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Tree age affects carbon sequestration potential via altering soil bacterial community composition and function.
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The sentences
The abundance of abfA and manA genes related to hemicellulose degradation showed a trend that increased with forest age, peaked in near-mature forest, and then declined in the mature forest stage.