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首页> 外文期刊>The Journal of the Torrey Botanical Society >Observations of extended lag phase of nonnative invasive Frangula alnus (Rhamnaceae) may be spatial-scale dependent
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Observations of extended lag phase of nonnative invasive Frangula alnus (Rhamnaceae) may be spatial-scale dependent

机译：对非侵袭性毛茸茸的延长滞后阶段的观察可能是空间级的依赖性

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摘要

Analysis of herbaria records allows for an examination of patterns of spatial spread of nonnative plants in novel ranges, aiding in understanding the processes that govern nonnative species invasions. I used herbaria records to investigate the rate of spread and pattern of establishment for the invasive plant Frangula alnus (Rhamnaceae) in northeastern and central North America. I collected records spanning a temporal range from ca. 1880 to the present and a spatial range covering the entire invaded area in northeast North America. To address unequal sampling effort in specimen collection, I compared temporal and spatial patterns of F. alnus accessions with patterns in a group of ecologically similar native species. Frangula alnus likely had multiple initial introductions into North America that were geographically separated, ranging from southern Ontario to the coastal Mid-Atlantic region. Trends in record collection in time and space show that the rate of spread of F alnus was initially slow, then increased rapidly during the early 20th century, and reached a relatively constant rate of spread in the later 20th century. Examining the spread of this species at the continental scale, it appears to have experienced an extended lag phase early in its invasion history, but has steadily increased in area of occupancy since ca. 1920. This counters previous reports suggesting a lag lasting to ca. 1970. These results raise the question of whether extended lag phases may be a spatial-scale-specific pattern. The analytical methods presented here provide one way to investigate this question further.
机译：豆根草皇族记录分析允许考察新型范围中非植物的空间传播模式，同意了解控制非愤怒物种侵犯的过程。我使用豆根植物记录来调查东北部和中部南美洲侵袭性植物毛茸茸狂野桤木（Rhamnaceae）的蔓延和模式。我收集了跨越CA的时间范围的记录。 1880年至今和覆盖着东北美国整个入侵地区的空间范围。为了解决标本收集中不等的抽样努力，我比较了在一组生态上类似的天然物种中的图案的F. Alnus Resights的时间和空间模式。 Frangula Alnus可能对北美有多次初步介绍，在地理上分开，从安大略省南部到沿海大西洋地区。时间和空间中记录收集的趋势表明，F桤木的扩散率最初是缓慢的，然后在20世纪初期迅速增加，并在20世纪后达到了相对较不变的传播速度。在大陆规模中审查该物种的传播，它似乎在其入侵历史上初期经历了延长的滞后阶段，但自加利福尼亚州以来的占用面积稳步增加。 1920年。这个柜台以前的报道表明延迟了加利福尼亚州。这些结果提出了延长滞后阶段是否可以是特定空间规模的模式的问题。这里提出的分析方法提供了一种进一步调查这个问题的一种方法。

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