Indirect interactions between invasive and native plants via pollinators

Kaiser‐Bunbury, Christopher N.; Müller, Christine

doi:10.1007/s00114-008-0481-x

Cited by 20 publications

(13 citation statements)

References 50 publications

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“…of an invasion has received considerably less attention (Richardson et al, 2000;Rudgers et al, 2005;Milton et al, 2007), especially when it concerns a partnership between alien species and native ones (Kaiser-Bunbury & Müller, 2009). This lack of attention in the literature is intriguing because mutualistic services need to be received, such as pollination and seed dispersal by animals, in order for the alien plants to complete their life cycles or to become successful invaders (Richardson et al, 2000).…”

mentioning

confidence: 99%

Fruit quantity of invasive shrubs predicts the abundance of common native avian frugivores in central Pennsylvania

Gleditsch¹,

Carlo

2010

Diversity and Distributions

113

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Aim Biological invasions pose one of the most severe threats to global biodiversity. Still, invasions can create positive ecological relationships and services, which can sometimes result in challenges for conservation efforts. A case in point is the invasion of alien plants that form mutualisms with native frugivorous birds. Here, we examined the correlation between honeysuckles (Lonicera spp.) and the bird communities in a landscape of central Pennsylvania during the fall months. Location State College area in central Pennsylvania, USA. Methods We conducted point counts to quantify the abundance of birds and fleshy‐fruited plant species within a 187.5 km2 landscape that included forested, urban and agricultural lands. We also compared fruit‐removal rates for a native fruiting plant under low and high Lonicera densities. Results The abundance of birds showed a strong positive association with Lonicera fruits, with the abundance of Turdus migratorius and Dumetella carolinensis showing the strongest correlations. We also found that fruit‐removal rates were 30% larger for a native plant species in areas of high Lonicera density compared to a site with low density of Lonicera. Main conclusions Our results suggest that Lonicera may currently serve as a main axis for the organization of bird communities and the networks of frugivore–plant interactions in central Pennsylvania. Since populations of key bird frugivores may be currently depending on Lonicera resources, we argue that control measures should account for the negative effects that the loss of this fruit resource could have on populations of native consumers in highly invaded regions.

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confidence: 99%

Fruit quantity of invasive shrubs predicts the abundance of common native avian frugivores in central Pennsylvania

Gleditsch¹,

Carlo

2010

Diversity and Distributions

113

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“…The visitors were captured for further identification when needed. The visitor frequency was recorded as the number of individuals visiting a plot per h. The inflorescence‐visiting rate was recorded as the number of inflorescences that a visitor interacted with in a single plot per h. The flower‐visiting rate was recorded as the number of flowers that a visitor interacted with in a single plot per h (Kaiser‐Bunbury & Müller ).…”

Section: Methodsmentioning

confidence: 99%

“…They use biotic relations to begin their invasion (Mack et al . ), interacting with native plant species, for example, through shared pollinators (Kaiser‐Bunbury & Müller ).…”

mentioning

confidence: 99%

Fruit set and the diurnal pollinators of the invasive Lantana camara and the endemic Lantana peduncularis in the Galapagos Islands

Carrión-Tacuri

Berjano²,

Guerrero

et al. 2014

Weed Biology and Management

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Fruit set is highly relevant to a plant's reproductive success. Fruit set can vary due to predation on flowers, pollinator services and/or resource availability. Reproductive success, measured as the fruit set of the invasive Lantana camara and the endemic Lantana peduncularis in the cool-dry season and the warm-wet season of the Galapagos Islands, was studied. Also, autonomous self-pollination ability and seed viability were probed for both species. Furthermore, flower visitors and their activity were registered for both species during the warm-wet season. Lantana peduncularis produced fewer flowers per inflorescence, but had a higher fruit set in the cool-dry season, compared to the warm-wet season. In contrast, the fruit set in L. camara did not change seasonally. The fruit set in L. camara was higher than in L. peduncularis in the warm-wet season. Moreover, ∼18% of the bagged flowers of the invasive Lantana produced fruits by autonomous self-pollination, while for the endemic Lantana, the rate of autonomous self-pollination was very low. More than 80% of the fruits for both species had at least one viable seed per fruit. The number of pollinators and their frequency, inflorescence-and flower-visiting rates and the duration of the visit per flower were higher in the invasive Lantana than in the endemic one. The endemic Lepidoptera Urbanus galapagensis (the main pollinator of both Lantana species) and the introduced Hymenia perspectalis were observed pollinating both Lantana species. These results indicate that the alien L. camara is more attractive to pollinators and it has reproductive advantages regarding fruit set in comparison with L. peduncularis, factors that contribute to the colonization pattern of this invasive species.

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“…Many are major pest species, especially when acting as vectors for plant viruses, causing critical damage to agricultural crops (Dedryver, Le Ralec, & Fabre, 2010). Their population and community dynamics have been studied extensively, including in the context of indirect species interactions (Hassell, 2000;Kaiser-Bunbury & Müller, 2009;Müller & Godfray, 1999;Sanders, Sutter, & Veen, 2013;Sanders, Kehoe, & van Veen, 2015;Snyder & Ives, 2001) as well as climate change (Forrest, 2016).…”

Section: Introductionmentioning

confidence: 99%

Shifting daylength regimes associated with range shifts alter aphid‐parasitoid community dynamics

Kehoe

Cruse

Sanders

et al. 2018

Ecology and Evolution

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With climate change leading to poleward range expansion of species, populations are exposed to new daylength regimes along latitudinal gradients. Daylength is a major factor affecting insect life cycles and activity patterns, so a range shift leading to new daylength regimes is likely to affect population dynamics and species interactions; however, the impact of daylength in isolation on ecological communities has not been studied so far. Here, we tested for the direct and indirect effects of two different daylengths on the dynamics of experimental multitrophic insect communities. We compared the community dynamics under “southern” summer conditions of 14.5‐hr daylight to “northern” summer conditions of 22‐hr daylight. We show that food web dynamics indeed respond to daylength with one aphid species (Acyrthosiphon pisum) reaching much lower population sizes at the northern daylength regime compared to under southern conditions. In contrast, in the same communities, another aphid species (Megoura viciae) reached higher population densities under northern conditions. This effect at the aphid level was driven by an indirect effect of daylength causing a change in competitive interaction strengths, with the different aphid species being more competitive at different daylength regimes. Additionally, increasing daylength also increased growth rates in M. viciae making it more competitive under summer long days. As such, the shift in daylength affected aphid population sizes by both direct and indirect effects, propagating through species interactions. However, contrary to expectations, parasitoids were not affected by daylength. Our results demonstrate that range expansion of whole communities due to climate change can indeed change interaction strengths between species within ecological communities with consequences for community dynamics. This study provides the first evidence of daylength affecting community dynamics, which could not be predicted from studying single species separately.

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Indirect interactions between invasive and native plants via pollinators

Cited by 20 publications

References 50 publications

Fruit quantity of invasive shrubs predicts the abundance of common native avian frugivores in central Pennsylvania

Fruit quantity of invasive shrubs predicts the abundance of common native avian frugivores in central Pennsylvania

Fruit set and the diurnal pollinators of the invasive Lantana camara and the endemic Lantana peduncularis in the Galapagos Islands

Shifting daylength regimes associated with range shifts alter aphid‐parasitoid community dynamics

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