...
首页> 外文期刊>Ecology letters >Forest species diversity reduces disease risk in a generalist plant pathogen invasion
【24h】

Forest species diversity reduces disease risk in a generalist plant pathogen invasion

机译:森林物种的多样性降低了植物病原体入侵中的疾病风险

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Empirical evidence suggests that biodiversity loss can increase disease transmission, yet our understanding of the 'diversity-disease hypothesis' for generalist pathogens in natural ecosystems is limited. We used a landscape epidemiological approach to examine two scenarios regarding diversity effects on the emerging plant pathogen Phytophthora ramorum across a broad, heterogeneous ecoregion: (1) an amplification effect exists where disease risk is greater in areas with higher plant diversity due to the pathogen's wide host range, or (2) a dilution effect where risk is reduced with increasing diversity due to lower competency of alternative hosts. We found evidence for pathogen dilution, whereby disease risk was lower in sites with higher species diversity, after accounting for potentially confounding effects of host density and landscape heterogeneity. Our results suggest that although nearly all plants in the ecosystem are hosts, alternative hosts may dilute disease transmission by competent hosts, thereby buffering forest health from infectious disease.
机译:经验证据表明,生物多样性的丧失可以增加疾病的传播,但是我们对自然生态系统中的多病原体的“多样性-疾病假说”的理解是有限的。我们使用景观流行病学方法研究了两个场景,这些场景涉及在广泛的异质生态区域中对新兴植物病原菌疫霉的多样性影响:(1)由于病原体的范围广,在植物多样性较高的地区,疾病风险更大的地方存在放大效应寄主范围,或(2)稀释效应,由于替代寄主的能力降低,风险随着多样性的增加而降低。我们发现了病原体稀释的证据,从而在考虑了宿主密度和景观异质性的潜在混杂影响之后,在具有较高物种多样性的地区,疾病风险较低。我们的结果表明,尽管生态系统中几乎所有植物都是寄主,但替代寄主可能会稀释主管寄主的疾病传播,从而使森林健康免受传染病的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号