Positive interactions between leafrollers and other arthropods enhance biodiversity on hybrid cottonwoods
Positive interactions between leafrollers and other arthropods enhance biodiversity on hybrid cottonwoods
复制标题
卷叶蛾和其他节肢动物之间的积极相互作用增强了杂交杨树的生物多样性
DOI：
10.1007/s004420050992
复制
发表时间：
2000
期刊：
影响因子：
2.7
通讯作者：
T. Whitham
中科院分区：
文献类型：
--
作者：
G. Martinsen;K. Floate;Amy E. M. Waltz;G. Wimp;T. Whitham
摘要：我们研究了一种普通食草动物通过提供栖息地间接影响其他不同群落成员的潜力。卷叶虫的幼虫通常以卷绕白杨的叶子来构筑庇护所。这些叶卷后来被其他节肢动物殖民。我们首先记录了有卷叶的棉杨新枝的物种丰富度是没有卷叶的棉杨新枝的4倍，丰富度是没有卷叶的棉杨新枝的7倍。其次，通过去除和添加实验，我们发现叶卷对节肢动物组合的这些差异负有责任。叶卷去除导致丰富度下降5倍，丰度下降7倍；添加叶卷可使丰富度增加2.5倍，丰度增加6倍。第三，为了确定卷叶是为了食物还是为了庇护而被殖民，我们比较了天然卷叶和人工卷叶的殖民。人工叶卷的丰富度和丰度都比人工叶卷高约2倍，表明叶卷主要是为了庇护而殖民的。在自然杂交区，回交杂交的卷叶虫密度是F1杂交的2倍。这些差异可能与叶片形态和/或叶片化学的遗传差异有关。最终，植物基因型影响有可能影响群落结构的积极的间接相互作用。这项研究和其他研究表明，庇护建造者（即卷叶虫和结瘿虫）提高了生物多样性，而散食性动物更有可能对生物多样性产生负面影响。
Abstract We examined the potential of a common herbivore to indirectly influence other diverse community members by providing habitat. Larvae of the leafroller Anacampsis niveopulvella commonly construct shelters by rolling leaves of cottonwood trees. These leaf rolls are later colonized by other arthropods. We first documented 4 times greater species richness and 7 times greater abundance on cottonwood shoots that contained a rolled leaf compared to adjacent shoots without leaf rolls. Second, with both removal and addition experiments, we showed that leaf rolls are responsible for these differences in arthropod assemblages. Leaf roll removal caused a 5-fold decline in richness and a 7-fold decline in abundance; leaf roll addition resulted in a 2.5-fold increase in richness and a 6-fold increase in abundance. Third, to determine whether rolled leaves are colonized for food or for shelter, we compared colonization of natural and artificial leaf rolls. Both richness and abundance were approximately 2-fold greater in artificial leaf rolls, indicating that leaf rolls are colonized primarily for shelter. Fourth, in a natural hybrid zone we found that leafroller densities were 2-fold greater on backcross hybrids than on F1 hybrids. These differences are likely associated with genetically-based differences in leaf morphology and/or leaf chemistry. Ultimately, plant genotype affects positive indirect interactions that have the potential to affect community structure. This study and others demonstrate that shelter builders (i.e., leafrollers and gall formers) enhance biodiversity, while free-feeders are more likely to negatively affect biodiversity.
影响因子：
1.3
作者：
Balla, Krisztina;Rakszegi, Mariann;Veisz, Otto
通讯作者：
Veisz, Otto