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为准确全面地了解黑麂（Muntiacus crinifrons）在九龙山国家级自然保护区的日活动节律和某些栖息地生态因子选择的季节性规律，于2017年10月—2021年2月，在九龙山国家级自然保护区采用红外相机法对黑麂日活动节律和垂直迁移的季节变化进行研究。研究期间，共拍摄到352张黑麂照片，提取到243次有效探测。结果显示：黑麂是晨昏双峰型的昼行性动物。通过四季对比发现，黑麂夏季的活动强度比春季、秋季和冬季高，而各季节间的日活动高峰期时间段和数量存在差异。黑麂 偏好栖息于坡度为20°~40°的栖息地，海拔选择和坡位选择存在季节性垂直迁移现象。

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选取浙江省低海拔地区的16个次生林样地并调查其中胸径(DBH)≥1 cm的木本植物.通过观察群落外貌，结合数量分类方法(TWINSPAN)和排序方法(DCA)，将这些样地划分为4种演替阶段的森林类型（马尾松林，马尾松针阔叶混交林，演替早期常绿阔叶林，演替中期常绿阔叶林）.分析了不同演替阶段的次生林群落物种多样性和植物功能群结构组成变化.结果显示：(1)适度择伐进入采伐期的马尾松可加速整个群落向常绿阔叶林演替；(2)随着演替的进行，物种丰富度、Shannon-Wiener指数、Simpson指数和Pielou均匀度指数均呈现增加趋势；(3)按生活型、生长型、叶的生活期和对光的耐受性这4种功能群划分，所有样地分别以小高位芽植物和中高位芽植物、乔木和灌木或小乔木、常绿植物和耐阴植物占优；(4)随着演替的进行，功能群结构比例呈现先降后升再降的是矮高位芽植物，先降后升的为小高位芽植物，呈现先升后降的为大高位芽植物、灌木、乔木、小乔木、常绿植物、阴性植物呈现上升趋势，落叶植物和阳性植物呈现下降趋势，而中高位芽植物、灌木或小乔木、耐阴植物则维持相对恒定的比例.

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Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guihaia is the property of Guihaia Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)