当前位置：
X-MOL 学术
›
Ecol. Entomol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Probing the role of propagule pressure, stochasticity, and Allee effects on invasion success using experimental introductions of a biological control agent
Ecological Entomology ( IF 2.0 ) Pub Date : 2020-11-23 , DOI: 10.1111/een.12979 Hester E. Williams 1 , Eckehard G. Brockerhoff 2, 3 , Andrew M. Liebhold 4, 5 , Darren F. Ward 1, 6
中文翻译：
使用生物防治剂的实验性介绍来探究繁殖压力，随机性和Allee效应对入侵成功的作用
更新日期：2020-11-23
Ecological Entomology ( IF 2.0 ) Pub Date : 2020-11-23 , DOI: 10.1111/een.12979 Hester E. Williams 1 , Eckehard G. Brockerhoff 2, 3 , Andrew M. Liebhold 4, 5 , Darren F. Ward 1, 6
Affiliation
|
- Although most populations of non‐native species arriving in new environments fail to establish, mechanisms behind failed biological invasions are still poorly understood.
- Propagule pressure has been found to be a dominant driver of establishment success, underpinned by processes such as stochasticity and Allee effects. While studies have revealed the presence of a component Allee effect in field populations, empirical support for demographic Allee effects has been limited.
- We used the leaf‐feeding beetle Neolema ogloblini, a biological control agent against the plant Tradescantiafluminensis, as a proxy invasive species to experimentally study the process of establishment. We investigated how the initial size of the population released affects the probability of establishment and population growth in the first season after introduction at isolated sites in New Zealand.
- The probability of establishment was found to increase with numbers of individuals released. A significant quadratic relationship was found between population size released and per capita population growth rate; that is per capita population growth rate initially increased as population size released increased but decreased at higher population levels.
- These results support the presence of a demographic Allee effect. However, as the influence of stochasticity (environmental and demographic) could not be completely separated from that of a demographic Allee effect, we conclude that extinction probability in the experimental populations of N. ogloblini was influenced by both a demographic Allee effect and stochasticity.
- Our study demonstrates and supports the concept that experimental biocontrol agent releases can be used for testing hypotheses regarding invasion biology.
中文翻译：
使用生物防治剂的实验性介绍来探究繁殖压力，随机性和Allee效应对入侵成功的作用
- 尽管进入新环境的大多数非本地物种种群无法建立，但对生物入侵失败的机制仍知之甚少。
- 已经发现，在诸如随机性和Allee效应等过程的支持下，传播压力是企业成功的主要驱动力。尽管研究表明野外种群中存在成分Allee效应，但对人口统计Allee效应的经验支持有限。
- 我们使用叶食甲虫Neolema ogloblini（一种针对植物Tradescantiafluminensis的生物防治剂）作为代理入侵物种，通过实验研究了建立过程。我们调查了在新西兰偏远地区引入后的第一个季节中释放的初始种群数量如何影响定居和种群增长的可能性。
- 发现建立的可能性随着释放的个人数量的增加而增加。发现释放的人口规模与人均人口增长率之间存在显着的二次关系。即人均人口增长率最初随着释放的人口规模的增加而增加，但随着人口数量的增加而降低。
- 这些结果支持了人口统计学Allee效应的存在。但是，由于随机性（环境和人口统计学）的影响无法与人口Allee效应完全分开，因此我们得出结论，球形夜蛾实验种群的灭绝概率受人口Allee效应和随机性的影响。
- 我们的研究证明并支持实验性生物控制剂释放可用于测试有关入侵生物学的假设的概念。
京公网安备 11010802027423号