Long-distance dispersal in amphibians

Fonte, Luís Fernando Marin da; Mayer, Michael S.; Lötters, Stefan

doi:10.21425/f5fbg44577

Cited by 33 publications

(23 citation statements)

References 48 publications

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“…Due to their risk of desiccation, open areas are often considered difficult for surface activity in these salamanders; however, studies of their migration in deforested areas as compared to their forested counterparts demonstrated no such limitation (Marsh et al., 2004). Additionally, studies exploring both past and contemporary patterns in range expansion suggest salamanders can disperse very long distances, though it varies among individuals and species (Fonte et al., 2019; Lowe, 2010; Pelletier & Carstens, 2016). We suspect that dispersal might be a strong predictor in how these species respond to climate change and that dispersal is not necessarily tied to habitat suitability because landscape features in relation to the resistance of gene flow have been found to vary across geographic areas within a single species of an eastern Plethodon salamander (Burgess & Garrick, 2020).…”

Section: Discussionmentioning

confidence: 99%

The impact of climate change on westernPlethodonsalamanders’ distribution

Nottingham

Pelletier

2021

Ecology and Evolution

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Aim: Given that salamanders have experienced large shifts in their distributions over time, we determined how each species of Plethodon in the Pacific Northwest would respond to climate change. We incorporated several greenhouse scenarios both on a species-by-species basis, and also using phylogenetic groups, with the aim to determine the best course of action in managing land area to conserve diversity in this group.

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Section: Discussionmentioning

confidence: 99%

The impact of climate change on westernPlethodonsalamanders’ distribution

Nottingham

Pelletier

2021

Ecology and Evolution

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“…The large number of transatlantic dispersals discussed in the preceding paragraphs, including the case of Streblopus, are vivid examples of these new discoveries, and many further cases of dispersals across other oceans have been proposed (to mention just a few: Carranza et al 2000;Briggs 2003;Yoder & Nowak 2006;Kodandaramaiah & Wahlberg 2007;Miraldo et al 2011;Gillespie et al 2012;de Queiroz 2014;Mitchell et al 2014;Yonezawa et al 2017;Kodandaramaiah et al 2018;da Fonte et al 2019; and the literature cited therein). Contrary to the allegations of many vicariance biogeographers that allude to dispersal events is a leap of faith and therefore "unscientific", Gillespie et al (2012) have elegantly demonstrated how a sound knowledge of the physical and biological factors influencing the pace and direction of dispersal routes can help us to predict distributional patterns and understand why some groups have been able to colonize some lands whereas others have not.…”

Section: Discussionmentioning

confidence: 96%

Systematics of the enigmatic South American Streblopus Van Lansberge, 1874 dung beetles and their transatlantic origin: a case study on the role of dispersal events in the biogeographical history of the Scarabaeinae (Coleoptera: Scarabaeidae)

Cupello¹,

Ribeiro-Costa²,

Vaz‐de‐Mello³

2020

EJT

1,430

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Streblopus Van Lansberge, 1874 has been one of the most mysterious dung beetle groups of the Neotropical fauna, having a rather peculiar morphology, very few known specimens in collections and a difficult placement among the scarabaeine lineages. In this work, based on the examination of a recently collected series of specimens and a synthesis of some scattered, but deeply valuable, information available in the literature, we readdress many of the questions posed by past authors. It is shown that Streblopus is a relict genus composed of two currently living species of widely disjunct distribution, namely S. opatroides Van Lansberge, 1874, from patches of Atlantic Forest in the Brazilian states of Bahia and Espírito Santo, and S. punctatus (Balthasar, 1938), known from a few localities across Sub-Andean humid forests in the Peruvian and Ecuadorian Amazon Forest. We redescribe both and present in detail the evidence pointing to their validity as two independent species; a discussion of their remarkable sexual dimorphism is also given. The biogeography of Streblopus in South America is addressed, and we conclude that the present disjunct distribution of the genus is a consequence of the retreat of the tropical forest corridors that once connected the Atlantic Forest to the Amazon Basin through the South American Dry Diagonal during several periods of the Neogene, particularly until the Middle Miocene. Finally, we propose an African origin for the genus based on its close phylogenetic relationship with a group of Old World taxa ‒ particularly Circellium Latreille, 1825 and Scarabaeini. Having diverged from those groups in the late Upper Cretaceous, we argue that the ancestor of Streblopus arrived in South America crossing the Atlantic Ocean by rafting. We present a synthesis of data from a wide variety of biological groups to support our ideas and contend that long-distance dispersal hypotheses should be taken more seriously by scarab beetle specialists.

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“…Yet, most conjectures concerning the riverine barrier effect upon amphibians are based on their presumed weak ability to actively move across riverbanks, and little attention has been given to their potential ability to passively move across and along rivers. Since macrophyte rafts do represent an important medium of passive long‐distance dispersal for amphibians (Schiesari et al 2003, Fonte et al 2019), in some cases rivers can in fact facilitate dispersal instead of hampering it. If this is true, this effect should be stronger for typical floating meadows species and, as a consequence, they can be expected to have large geographic ranges across Amazonia.…”

Section: Discussionmentioning

confidence: 99%

Amphibian diversity in the Amazonian floating meadows: a Hanski core‐satellite species system

et al. 2021

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The Amazon catchment is the largest river basin on earth, and up to 30% of its waters flow across floodplains. In its open waters, floating plants known as floating meadows abound. They can act as vectors of dispersal for their associated fauna and, therefore, can be important for the spatial structure of communities. Here, we focus on amphibian diversity in the Amazonian floating meadows over large spatial scales. We recorded 50 amphibian species over 57 sites, covering around 7000 km along river courses. Using multi‐site generalised dissimilarity modelling of zeta diversity, we tested Hanski's core‐satellite hypothesis and identified the existence of two functional groups of species operating under different ecological processes in the floating meadows. ‘Core' species are associated with floating meadows, while ‘satellite' species are associated with adjacent environments, being only occasional or accidental occupants of the floating vegetation. At large scales, amphibian diversity in floating meadows is mostly determined by stochastic (i.e. random/neutral) processes, whereas at regional scales, climate and deterministic (i.e. niche‐based) processes are central drivers. Compared with the turnover of ‘core' species, the turnover of ‘satellite' species increases much faster with distances and is also controlled by a wider range of climatic features. Distance is not a limiting factor for ‘core' species, suggesting that they have a stronger dispersal ability even over large distances. This is probably related to the existence of passive long‐distance dispersal of individuals along rivers via vegetation rafts. In this sense, Amazonian rivers can facilitate dispersal, and this effect should be stronger for species associated with riverine habitats such as floating meadows.

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Long-distance dispersal in amphibians

Cited by 33 publications

References 48 publications

The impact of climate change on westernPlethodonsalamanders’ distribution

The impact of climate change on westernPlethodonsalamanders’ distribution

Systematics of the enigmatic South American Streblopus Van Lansberge, 1874 dung beetles and their transatlantic origin: a case study on the role of dispersal events in the biogeographical history of the Scarabaeinae (Coleoptera: Scarabaeidae)

Amphibian diversity in the Amazonian floating meadows: a Hanski core‐satellite species system

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