Ecological factors associated with pre-dispersal predation of fig seeds and wasps by fig-specialist lepidopteran larvae

Date
2018-03-22
Authors
Piatscheck, Finn
Van Goor, Justin
Nason, John
Houston, Derek
Nason, John
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Nason, John
Person
Research Projects
Organizational Units
Journal Issue
Series
Abstract

In brood pollination mutualisms, predation of developing fruit can have large negative repercussions for both plant and pollinator population dynamics. The Sonoran Desert rock fig Ficus petiolaris and its highly-coevolved wasp pollinator are subject to frequent attack by lepidopteran larvae that consume fig fruit and the developing seeds and larval pollinators they contain. We used generalized linear mixed models to investigate how the phenology, quantity, and spatial distribution of fig fruits is associated with variation in lepidopteran damage intensity on individual trees at nine geographic locations spanning a 741 km latitudinal transect along Mexico’s Baja California Peninsula. We found lepidopteran damage to be strongly positively associated with more synchronous fig crops and larger trees, and only weakly associated with local host tree density. These results imply that fruit production that is asynchronous within trees and spread out over time, as observed in several fig species, benefits female and male components of fitness (pollen disperser and seed production, respectively) by reducing pre-dispersal predation by frugivores.

Description
<p>This is a manuscript of an article published as Piatscheck, Finn, Justin Van Goor, Derek D. Houston, and John D. Nason. "Ecological factors associated with pre-dispersal predation of fig seeds and wasps by fig-specialist lepidopteran larvae." <em>Acta Oecologica</em> (2018). doi: <a href="https://doi.org/10.1016/j.actao.2018.03.001" target="_blank" title="Persistent link using digital object identifier">10.1016/j.actao.2018.03.001</a>. Posted with permission.</p>
Keywords
flowering phenology, density effects, Ficus, Lepidoptera, seed predation, symbiosis
Citation
Collections