Phylogeographic structure of Canthon cyanellus (Coleoptera: Scarabaeidae), a Neotropical dung beetle in the Mexican Transition Zone: Insights on its origin and the impacts of Pleistocene climatic fluctuations on population dynamics

AbstractPopulation persistence is strongly determined by climatic variability. Changes in the patterns of climatic events linked to global warming may alter population dynamics, but their effects may be strongly modulated by biotic interactions. Plant populations interact with each other in such a way that responses to climate of a single population may impact the dynamics of the whole community. In this study, we assess how climate variability affects persistence and coexistence of two dominant plant species in a semiarid shrub community on gypsum soils. We use 9 years of demographic data to parameterize demographic models and to simulate population dynamics under different climatic and ecological scenarios. We observe that populations of both coexisting species may respond to common climatic fluctuations both similarly and in idiosyncratic ways, depending on the yearly combination of climatic factors. Biotic interactions (both within and among species) modulate some of their vital rates, but their effects on population dynamics highly depend on climatic fluctuations. Our results indicate that increased levels of climatic variability may alter interspecific relationships. These alterations might potentially affect species coexistence, disrupting competitive hierarchies and ultimately leading to abrupt changes in community composition.

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A Historical Perspective of the Mexican Transition Zone

The Mexican Transition Zone ◽

10.1007/978-3-030-47917-6_3 ◽

2020 ◽

pp. 69-101

Author(s):

Juan J. Morrone

Keyword(s):

Transition Zone ◽

Historical Perspective ◽

Mexican Transition Zone

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The Mexican Transition Zone

Neotropical Biogeography ◽

10.1201/b21824-4 ◽

2017 ◽

pp. 49-80

Keyword(s):

Transition Zone ◽

Mexican Transition Zone

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Peer Review #1 of "Molecular clocks, biogeography and species diversity in Herichthys with evaluation of the role of Punta del Morro as a vicariant brake along the Mexican Transition Zone in the context of local and global time frame of cichlid diversification (v0.1)"

10.7287/peerj.8818v0.1/reviews/1 ◽

2020 ◽

Author(s):

P Ornelas

Keyword(s):

Species Diversity ◽

Peer Review ◽

Transition Zone ◽

Time Frame ◽

Molecular Clocks ◽

Global Time ◽

Mexican Transition Zone

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New genus of Muscidae: Coenosiinae (Diptera) from the Mexican Transition Zone and its phylogenetic position based on morphological evidence

Insect Systematics & Evolution ◽

10.1163/1876312x-bja10003 ◽

2020 ◽

pp. 1-15

Author(s):

Lucas Roberto Pereira Gomes ◽

João Manuel Fogaça ◽

Claudio José Barros de Carvalho

Keyword(s):

Transition Zone ◽

New Genus ◽

Hind Tibia ◽

Phylogenetic Position ◽

Morphological Evidence ◽

Posterior Surface ◽

Male And Female ◽

Apical Half ◽

Mexican Transition Zone ◽

A New Species

A new monotypic genus, Aztecamyia gen. nov., is proposed for a new species of muscid fly, Aztecamyia tlaloc sp. nov., found in highland localities from the Mexican Transition Zone (Mexico, Michoacan, Morelos and Puebla). Additionally, a morphology-based phylogenetic analysis of Coenosiini is presented. The new genus has some unique characters, such as katepisternal setae 0+1+1 in males, while females are the typically Coenosiini 1+1+1; the mid and hind tibia have many long and fine setae on the apical half, from the anterior to posterior surface; and the preapical setae on all femora are absent on all surfaces. The morphology of the male and female terminalia is a typical Coenosiini shape.

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