Preszler Ralph W, Boecklen William J
Department of Biology, New Mexico State, University, Box 30001/Department 3AF, 88003-0001, Las Cruces, NM, USA.
Oecologia. 1994 Nov;100(1-2):66-73. doi: 10.1007/BF00317131.
We investigated relationships between host plant hybridization in the Quercus grisea x Q. gambelii species complex and the distribution and performance of a leaf-mining moth in the genus Phyllonorycter. In 2 years at two sites Phyllonorycter densities were lowest on Q. grisea and increased through the categories of hybrid host plants to Q. gambelii. Direct host plant effects on Phyllonorycter performance were consistent with Phyllonorycter distribution; unexplained mortality of larvae in the mines, which is often associated with direct plant effects, decreased from Q. grisea through the hybrids to Q. gambelii. Plant hybridization influenced parasitism of Phyllonorycter. Parasitism was density dependent, and across all densities was higher on Q. grisea and Q. gambelii than on hybrid host plants.
我们研究了灰栎（Quercus grisea）×甘贝尔栎（Q. gambelii）物种复合体中的宿主植物杂交与潜叶蛾属（Phyllonorycter）一种潜叶蛾的分布及表现之间的关系。在两年时间里，于两个地点开展研究，结果显示，Phyllonorycter在灰栎上的密度最低，并且随着杂交宿主植物类别增加至甘贝尔栎，其密度也随之上升。宿主植物对Phyllonorycter表现的直接影响与Phyllonorycter的分布一致；矿道内幼虫无法解释的死亡率通常与植物的直接影响有关，从灰栎到杂交种再到甘贝尔栎，这一死亡率逐渐降低。植物杂交影响了Phyllonorycter的寄生情况。寄生具有密度依赖性，在所有密度条件下，灰栎和甘贝尔栎上的寄生率高于杂交宿主植物。
