Fruiting phenology as a “triggering attribute” of invasion process: Do invasive species take advantage of seed dispersal service provided by native birds?

Vergara-Tabares, David L.; Badini, Julieta; Peluc, Susana Inés

doi:10.1007/s10530-015-1039-4

Cited by 32 publications

(21 citation statements)

References 46 publications

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“…) and Celtis ehrenbergiana (Vergara‐Tabares et al . ). Moreover, a species of the same genus, Turdus merula , was observed eating fruits of C. franchetii in New Zealand (Williams & Karl ) and of other Cotoneaster species in their native ranges (Crofts & Jefferson ; Belkouche & Doumandji ).…”

Section: Discussionmentioning

confidence: 97%

“…It is important to notice that this species is also the main fruit consumer of the invasive aliens Pyracantha angustifolia and P. coccinea (Vergara‐Tabares et al . ) at lower elevations of the mountains of central Argentina, where it also eats fruits of the native shrubs Condalia montana (Ponce et al . ) and Celtis ehrenbergiana (Vergara‐Tabares et al .…”

Section: Discussionmentioning

confidence: 99%

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The role of frugivorous birds in fruit removal and seed germination of the invasive alien Cotoneaster franchetii in central Argentina

et al. 2018

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Many invasive plant species have fleshy fruits that are eaten by native frugivorous birds which disperse their seeds and may facilitate their germination, playing an important role in plant invasion success. The fleshy-fruited shrub Cotoneaster franchetii (Rosaceae) is an important invasive alien in the mountainous regions of central Argentina. To determine the role of avian frugivorous in fruit removal of this species, we conducted a frugivore exclusion experiment including bagged and unbagged branches in 75 plants of C. franchetii. At the end of the dispersal period, we compared the percentage of missing fruits (removed by birds + naturally dropped) in unbagged branches with the percentage of naturally dropped fruits in bagged branches. To assess whether any mechanism acting on seeds during their passage through bird guts (de-inhibition by pulp removal and/or seed scarification) affects seed germination of this species, we compared percentage and speed of germination among seeds obtained from faeces of the native frugivorous Turdus chiguanco, from manually de-pulped fruits, and from intact fruits. The percentage of missing fruits per shrub in unbagged branches was significantly higher than the percentage of naturally dropped fruits in bagged branches, suggesting that frugivorous birds play an important role in fruit removal of C. franchetii in the study area. Seeds from bird faeces and from manually de-pulped fruits germinated in higher percentage and faster than seeds from intact fruits. Germination percentage and speed of seeds from manually de-pulped fruits were significantly higher than those of gut-passed seeds. These results indicate that T. chiguanco increases and accelerates seed germination of C. franchetii through pulp removal, but not through seed scarification. Overall, our findings indicate that native frugivorous birds facilitate the dispersal and germination success of C. franchetii, likely playing an important role in its invasion throughout the mountainous region of central Argentina.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

The role of frugivorous birds in fruit removal and seed germination of the invasive alien Cotoneaster franchetii in central Argentina

et al. 2018

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“…En China forma matorrales en laderas de montañas (Cuizhi & Spongberg, 2003). En Argentina, fue citada para la provincia de Córdoba (Delucchi, 1991;Giorgis & Tecco, 2014;Vergara Tabares et al, 2016) y Salta (Novara, 2012). Además, según registros de herbario, se encuentra naturalizada en las provincias de Buenos Aires, Catamarca, La Pampa, San Luis y Tucumán.…”

Section: Resultsunclassified

Sinopsis de las especies de Pyracantha (Rosaceae, Maloideae) naturalizadas en Argentina

Jocou

Gandullo

2019

Bol. Soc. Argent. Bot.

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Introducción y objetivos: El género Pyracantha posee alrededor de diez especies, difundidas como ornamentales, naturalizadas y consideradas invasoras en diferentes partes del mundo. Históricamente, la identificación de los taxones ha sido dificultosa. Tres especies fueron reportadas como naturalizadas en la Argentina, sin embargo, no se ha efectuado una revisión del género en el país hasta el momento. Con el fin de realizar nuevos aportes a la Flora Argentina, dadas la complejidad del género y la falta de un trabajo integral al respecto, el objetivo de esta contribución es presentar una sinopsis de las especies de Pyracantha naturalizadas en la Argentina. M&M: Se estudiaron ejemplares de cada especie de diversos herbarios nacionales e internacionales, y se contrastaron con los ejemplares tipo. Se revisaron las descripciones originales y bibliografía específica de cada taxón. Resultados: Se presenta un resumen de las cinco especies naturalizadas. Se proveen mapas de distribución en la Argentina, además de descripciones, una clave, esquemas de los principales caracteres morfológicos foliares y una serie de imágenes que permiten la identificación de las especies. Se designan lectotipos para cuatro nombres. Conclusiones: Cinco especies se encuentran naturalizadas en la Argentina. P. fortuneana y P.koidzumii constituyen nuevos registros para la flora del país. Hasta el momento, P. fortuneana representa la especie con distribución más austral y, junto a P. angustifolia, son las especies más distribuidas en la Argentina. P. koidzumii se encuentra restringida principalmente al centro-este del país. P. atalantioides y P. coccinea son las especies menos representadas.

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“…(iv) Firethorn ( Pyracantha angustifolia ) is an evergreen and thorny shrub from China whose fleshy fruits are dispersed by birds (Vergara‐Tabares et al . , ). (v) Chinaberry ( Melia azedarach ) is a deciduous tree from Southeast Asia probably dispersed by birds and bats (Mabberley ; Voigt et al .…”

Section: Methodsmentioning

confidence: 99%

Post‐burning germination responses of woody invaders in a fire‐prone ecosystem

et al. 2019

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It has been frequently recognised that there is a positive feedback between plant invasion and fire underlying invasion success in fire-prone ecosystems. Accordingly, the response of woody alien species germination to fire may have direct implications on their invasiveness in those ecosystems, particularly when fruit ripening occurs in the fire season. Here, we experimentally evaluated the germination response of some of the main woody invaders of the Chaco Serrano dry woodlands (Gleditsia triacanthos, Cotoneaster glaucophyllus, Ligustrum lucidum, Pyracantha angustifolia and Melia azedarach), which fruit in the seasons of highest fire frequency. Seeds were subjected to heat-shock treatments that simulated a range of heat intensities, and the species were classified according to their germination response as heat sensitive, tolerant or stimulated. Since Gleditsia triacanthos has indehiscent fruits that fall from the plant and might be exposed to flames, its germination response was also assessed of seeds exposed to fruit burning. Germination responses to heat varied among the invasive species. G. triacanthos seeds experienced increased germination under very low and low heat indexes; it was therefore classified as heat stimulated. The other four species showed no change in germination under very low heat indexes and were therefore considered heat tolerant. However, all species were sensitive to high heat as indicated by their significant decline in germination. G. triacanthos would have limited capacity to recruit from seeds following flaming combustion of its fruits. The prevalence of heat-tolerant rather than heat-stimulated germination responses suggests that the occurrence of frequent and seasonal fires in this subtropical savanna system might delay rather than boost the expansion of these invasive species in the system. Yet, the presence of heat-stimulated germination in one of the studied species warns against generalisation, even within the same ecosystem, and further supports the idiosyncratic nature of invasion success.Abstract in Spanish is available with online material.

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Fruiting phenology as a “triggering attribute” of invasion process: Do invasive species take advantage of seed dispersal service provided by native birds?

Cited by 32 publications

References 46 publications

The role of frugivorous birds in fruit removal and seed germination of the invasive alien Cotoneaster franchetii in central Argentina

The role of frugivorous birds in fruit removal and seed germination of the invasive alien Cotoneaster franchetii in central Argentina

Sinopsis de las especies de Pyracantha (Rosaceae, Maloideae) naturalizadas en Argentina

Post‐burning germination responses of woody invaders in a fire‐prone ecosystem

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