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首页> 外文期刊>Biological Conservation >Effects of harvester behavior on population growth rate affects sustainability of ginseng trade.
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Effects of harvester behavior on population growth rate affects sustainability of ginseng trade.

机译：收割机行为对人口增长率的影响会影响人参贸易的可持续性。

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摘要

When long-term, intense levels of harvest nearly extirpated Chinese ginseng (Panax ginseng C. Meyer) in the early 18th century, commercial harvest of American ginseng (P. quinquefolius L.) began and large quantities of the roots were exported to East Asia. Annual export figures have fallen over the past 200 years, but demand for wild American ginseng has not abated. Persistent harvest of long-lived, slow-maturing species can have negative impacts on population growth rates, yet those closest to wild resources are often in a position to be the best stewards of that resource. This study explored the consequences of different harvester behaviors on the population dynamics of American ginseng. Drawing on known behaviors, we developed three harvester 'types' and ran demographic simulations on wild ginseng populations, partitioning the sources of differences in population growth rates using a life table response experiment (LTRE). The simulations showed that ignoring size class limits and harvest season onset dates dramatically affected population growth rates. Existing laws in many states are not adequate to protect wild ginseng populations. A stewardship-oriented harvester, who delays harvest onset by two weeks, self-limits harvest intensity and plants ginseng seeds at the time of harvest can reverse declining population growth rates..
机译：在18世纪初期，长期的密集采伐几乎使中国人参（Panax ginseng C. Meyer）灭绝时，西洋参（P. quinquefolius L.）开始商业化收获，并且大量的根被出口到东亚。 。在过去的200年中，年度出口数据有所下降，但对野生西洋参的需求并未减少。长期采收长寿，缓慢成熟的物种可能会对人口增长率产生负面影响，但最接近野生资源的物种通常可以成为该资源的最佳管理者。本研究探讨了不同收割机行为对西洋参种群动态的影响。利用已知的行为，我们开发了三种“收割机”类型并对野生人参种群进行了人口统计模拟，使用生命表响应实验（LTRE）划分了种群增长率差异的来源。模拟表明，忽略大小等级限制和收获季节开始日期会极大地影响人口增长率。许多州的现行法律不足以保护野山人参种群。以管理为导向的收割机可以将收割开始时间推迟两周，可以自我限制收割强度，在收割时种植人参种子可以逆转人口增长率下降的趋势。

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