Can gypsy moth stand the heat? A reciprocal transplant experiment with an invasive forest pest across its southern range margin
Can gypsy moth stand the heat? A reciprocal transplant experiment with an invasive forest pest across its southern range margin
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DOI：
10.1007/s10530-018-1907-9
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发表时间：
2019-04-01
影响因子：
2.9
通讯作者：
Grayson, Kristine L.
中科院分区：
文献类型：
--
作者：
Faske, Trevor M.;Thompson, Lily M.;Grayson, Kristine L.
温度提供了重要的生理限制，可以影响入侵物种的分布。舞毒蛾是一个多面手落叶在北美和超最适温度（以上的最佳发育率）已牵连在范围内动态在南部入侵前在西弗吉尼亚州和弗吉尼亚州。我们来源卵块阿巴拉契亚山脉（AM），其中舞毒蛾的范围正在扩大，从沿海平原（CP），范围收缩发生，并从一个长期建立的人口在纽约（NY）和进行了相互移植实验，比较这些人口之间的发展和健身组件在两个网站沿着南部入侵前线。我们发现的证据表明，亚致死效应饲养在CP，蛹质量下降，鸡蛋较少相比，个人饲养在AM，但源种群之间的发育性状差异不大。AM和纽约人口经历了减少在CP网站的南部冬季的鸡蛋活力相比，控制越冬条件下，而CP卵块有相当的生存。这项研究提供了经验支持的负健身的超最佳温度在南部范围边缘的后果，与该地区的范围收缩和蔓延的模式相一致，以及建议通过改变鸡蛋生存的潜力，当地的适应。我们的工作表明，高温的亚致死效应可能是决定入侵物种在当前和未来气候下分布的重要因素。
Temperature provides important physiological constraints that can influence the distribution of an invasive species. Gypsy moth (Lymantria disparL.) is a generalist defoliator in North America and supraoptimal temperatures (above the optimal for developmental rate) have been implicated in range dynamics at the southern invasion front in West Virginia and Virginia. We sourced egg masses from the Appalachian Mountains (AM), where the gypsy moth range is expanding, from the Coastal Plain (CP), where range retraction is occurring, and from a long-established population in New York (NY) and conducted a reciprocal transplant experiment to compare development and fitness components among these populations at two sites along the southern invasion front. We found evidence of sublethal effects from rearing in the CP, with decreased pupal mass and fewer eggs compared to individuals reared in the AM, but little difference between source populations in developmental traits. The AM and NY populations did experience reductions in egg viability under a southern winter at the CP site compared to control wintering conditions, while the CP egg masses had equivalent survival. This study provides empirical support for negative fitness consequences of supraoptimal temperatures at the southern range edge, consistent with patterns of range retraction and spread in the region, as well as suggesting the potential for local adaptation through variation in egg survival. Our work illustrates that sublethal effects from high temperature can be an important factor determining the distribution of invasive species under current and future climates.