Raising a racket: invasive species compete acoustically with native treefrogs

Tennessen, Jennifer B.; Parks, Susan E.; Tennessen, Travis P.; Langkilde, Tracy

doi:10.1016/j.anbehav.2016.01.021

Cited by 29 publications

(21 citation statements)

References 46 publications

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“…The Cuban treefrog is native to several Caribbean island groups and was first reported in Florida in 1931 and in our study region (Hillsborough County) in 1996 (Barbour, 1931; Meshaka Jr., 1996). Cuban treefrogs negatively impact native amphibians in Florida through competition and predation (Glorioso, Waddle, Crockett, Rice, & Percival, 2010; Knight, Parris, & Gutzke, 2009; Meshaka Jr., 2001; Rice et al., 2011; Smith, 2005; Tennessen, Parks, Tennessen, & Langkilde, 2016; Wyatt & Forys, 2004). Cuban treefrogs have a lower helminth species richness in Florida than in their native range, which is consistent with the ERH (Ortega et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

Elucidating mechanisms of invasion success: Effects of parasite removal on growth and survival rates of invasive and native frogs

Roznik

Surbaugh

Cano

et al. 2020

Journal of Applied Ecology

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Identifying the mechanisms underlying biological invasions can inform the management of invasive species. The enemy release hypothesis (ERH) suggests that invasive species have a competitive advantage in their introduced range because they leave behind many of their predators and parasites from their native range, allowing them to shift resources from defences to growth, reproduction and dispersal. Many studies have demonstrated that invasive species have fewer parasites than their native counterparts, but few studies have tested whether the loss of these natural enemies appears to be a primary driver of the invasion process. To test the ERH, we conducted a mark–recapture study in which we used an anthelmintic drug to successfully reduce parasitic worms in invasive Cuban treefrogs Osteopilus septentrionalis and native treefrogs (Hyla spp.) at half of 12 wetlands, marking nearly 4,200 frogs. If the ERH is supported, we would expect that treating for parasitic worms would have a greater benefit to native than invasive hosts. Growth and survival rates of invasive and native treefrogs responded similarly to the anthelmintic treatment, suggesting that the Cuban treefrog's release from parasitic worms does not appear to significantly contribute to its invasiveness in established areas. Instead, it appears that the overall faster rates of growth and maturation, higher survival rates and larger body sizes of Cuban treefrogs that we observed may contribute to their expansion and proliferation. Synthesis and applications. Although Cuban treefrogs have a lower diversity of parasitic worms in their invasive than native range, this does not appear to significantly contribute to their invasion success in areas where they have been established for more than 20 years. This suggests that any manipulation of parasites in invasive or native hosts would not be an effective method of controlling Cuban treefrogs or reducing their impacts. Further research into other hypotheses is needed to explain the Cuban treefrog's success and help guide management actions to reduce their spread and negative impacts. Our study demonstrates that enemy release may not be a primary driver of invasiveness, highlighting the need for more experimental tests of the enemy release hypothesis to examine its generality.

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Section: Introductionmentioning

confidence: 99%

Elucidating mechanisms of invasion success: Effects of parasite removal on growth and survival rates of invasive and native frogs

Roznik

Surbaugh

Cano

et al. 2020

Journal of Applied Ecology

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“…The mechanisms by which invasive species impact native species include direct competition (e.g. [ 1 , 2 ]), herbivory, predation, and indirect effects such as alteration of ecosystem disturbance regimes or resource availability [ 3 ]. While habitat fragmentation and invasive species both have received extensive individual attention (e.g.…”

Section: Introductionmentioning

confidence: 99%

Vertical foraging shifts in Hawaiian forest birds in response to invasive rat removal

et al. 2018

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Worldwide, native species increasingly contend with the interacting stressors of habitat fragmentation and invasive species, yet their combined effects have rarely been examined. Direct negative effects of invasive omnivores are well documented, but the indirect effects of resource competition or those caused by predator avoidance are unknown. Here we isolated and examined the independent and interactive effects of invasive omnivorous Black rats (Rattus rattus) and forest fragment size on the interactions between avian predators and their arthropod prey. Our study examines whether invasive omnivores and ecosystem fragment size impact: 1) the vertical distribution of arthropod species composition and abundance, and 2) the vertical profile of foraging behaviors of five native and two non-native bird species found in our study system. We predicted that the reduced edge effects and greater structural complexity and canopy height of larger fragments would limit the total and proportional habitat space frequented by rats and thus limit their impact on both arthropod biomass and birds’ foraging behavior. We experimentally removed invasive omnivorous Black rats across a 100-fold (0.1 to 12 ha) size gradient of forest fragments on Hawai‘i Island, and paired foraging observations of forest passerines with arthropod sampling in the 16 rat-removed and 18 control fragments. Rat removal was associated with shifts in the vertical distribution of arthropod biomass, irrespective of fragment size. Bird foraging behavior mirrored this shift, and the impact of rat removal was greater for birds that primarily eat fruit and insects compared with those that consume nectar. Evidence from this model study system indicates that invasive rats indirectly alter the feeding behavior of native birds, and consequently impact multiple trophic levels. This study suggests that native species can modify their foraging behavior in response to invasive species removal and presumably arrival through behavioral plasticity.

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“…To date, few studies have examined the vocal responses of native species to the calls of invasive species, and these have been undertaken exclusively in anurans. These studies found that some species use vocal plasticity to try mitigate the effects of masking (Both and Grant 2012, Bleach et al 2015, Tennessen et al 2016, Medeiros et al 2017). In our study, black‐throated finches produced fewer calls when exposed to noises that completely overlapped the frequency range of their call.…”

Section: Discussionmentioning

confidence: 99%

“…Anurans may change dominant frequency, amplitude, call duration or call rate in response to the calls of invasive species. These adjustments may improve signal transmission or conserve energy amidst the calls of invasive species, indicating that invasive species' calls may mask unmodified native anuran calls (Both and Grant 2012, Bleach et al 2015, Tennessen et al 2016, Medeiros et al 2017). Masking prevents individuals from receiving, processing and acting on acoustic signals (Klump 1996).…”

Section: Introductionmentioning

confidence: 99%

An endangered bird calls less when invasive birds are calling

Hopkins

Edwards

Laguna

et al. 2021

Journal of Avian Biology

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Novel noises can affect various animal behaviours, and changes to vocal behaviour are some of the most documented. The calls of invasive species are an important source of novel noise, yet their effects on native species are poorly understood. We examined the effects of invasive bird calls on the vocal activity of an endangered Australian finch to investigate whether: 1) native finch calling behaviour was affected by novel invasive bird calls, and 2) the calls of the finches overlapped in frequency with those of invasive birds. We exposed a wild population of black‐throated finch southern subspecies Poephila cincta cincta to the vocalisations of two invasive birds, nutmeg mannikins Lonchura punctulata and common mynas Acridotheres tristis, a synthetic ‘pink' noise, and a silent control. To determine whether the amount of black‐throated finch calling differed in response to treatments, we recorded and quantified black‐throated finch vocalisations, and assessed the amount of calling using a generalised linear mixed model followed by pairwise comparisons. We also measured, for both black‐throated finches and the stimulus noises: dominant, minimum and maximum frequency, and assessed the degree of frequency overlap between black‐throated finch calls and stimulus noises. Compared to silent controls, black‐throated finches called less when exposed to common myna calls and pink noise, but not to nutmeg mannikin calls. We also found that pink noise overlapped most in frequency with black‐throated finch calls. Common myna calls also somewhat overlapped the frequency range of black‐throated finch calls, whereas nutmeg mannikin calls overlapped the least. It is possible that masking interference is the mechanism behind the reduction in calling in response to common myna calls and pink noise, but more work is needed to resolve this. Regardless, these results indicate that the calls of invasive species can affect the behaviour of native species, and future research should aim to understand the scope and severity of this issue.

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Raising a racket: invasive species compete acoustically with native treefrogs

Cited by 29 publications

References 46 publications

Elucidating mechanisms of invasion success: Effects of parasite removal on growth and survival rates of invasive and native frogs

Elucidating mechanisms of invasion success: Effects of parasite removal on growth and survival rates of invasive and native frogs

Vertical foraging shifts in Hawaiian forest birds in response to invasive rat removal

An endangered bird calls less when invasive birds are calling

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