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Artículo

Ecological role of a flower-dwelling predator in a tri-trophic interaction in northwestern Patagonia

Gavini, SabrinaIcon ; Quintero, CarolinaIcon ; Tadey, MarianaIcon
Fecha de publicación: 01/2019
Editorial: Elsevier Masson
Revista: Acta Oecologica
ISSN: 1146-609X
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ecología

Resumen

Flower-dwelling predators may play several ecological roles depending on their effects on the reproductive success of the plants that they use to forage. However, tri-trophic interactions often are context-dependent highlighting the importance of assessing both the overall top-down effect on plant fitness and predator behavioral and physiological attributes that shape that outcome. We studied the effect of the flower-dwelling crab spider Misumenops pallidus on the perennial herb Anemone multifida in a low-thicket in Northwestern Patagonia. We measured pollinator visitation frequency, florivory rate, plant fitness, spider abundance, and spider´s physiological (e.g. camouflage) and behavioral attributes (e.g. host selection, fidelity) that aid to define its possible ecological role. Misumenops pallidus showed a generalist diet (mostly pollinators), camouflage strategies, and intraspecific selection for plants bearing higher number and longer trichomes. Additionally, it displayed host-fidelity with long periods of permanence in the selected host plant, occupying ~25% of plant population. However, the presence of these spiders did not affect pollinator visitation rate, florivory or plant fitness, indicating a commensalism role. Our findings suggested that the asymmetric benefit in this plant-spider association may be attributed to a combination of factors. In particular, the low-to-moderate spider abundance, generalist diet and cryptic camouflage; all of which weaken their top-down effects on pollinators and plant fitness, especially whenever ecological redundant pollinators are present. However, temporal and/or spatial variation on spider population might enhance this asymmetric benefit for the spider, potentially changing its role from commensalism to antagonism.
Palabras clave: ANEMONE MULTIFIDA , CRAB SPIDERS , HOST SELECTION , PLANT FITNESS , SPIDER PLANT ASSOCIATION
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/110801
DOI: https://doi.org/10.1016/j.actao.2018.12.001
URL: https://www.sciencedirect.com/science/article/abs/pii/S1146609X18302479
Colecciones
Articulos(INIBIOMA)
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Citación
Gavini, Sabrina; Quintero, Carolina; Tadey, Mariana; Ecological role of a flower-dwelling predator in a tri-trophic interaction in northwestern Patagonia; Elsevier Masson; Acta Oecologica; 95; 1-2019; 100-107
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