Reptiles

Giraudo, Alejandro R.; Arzamendia, Vanesa; López, Soledad Mochales

doi:10.1007/978-3-540-70624-3_14

Cited by 8 publications

(35 citation statements)

References 28 publications

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“…, 2000). This distribution pattern has been mentioned for several aquatic and terrestrial organisms (Bonetto, 1961; Bonetto & Drago, 1968; Rabinovich & Rapoport, 1975; Morrone & Lopretto, 1994; Giraudo & Arzamendia, 2004; Giraudo et al. , 2007; Arzamendia & Giraudo, 2009).…”

Section: Discussionsupporting

confidence: 63%

“…The Paraguay River contributes less water flow, more sediment and more biotic elements to the Middle Paraná River, while the Upper Paraná River Basin provides more water flow, though with less sediment (Paoli et al. , 2000; Giraudo et al. , 2007).…”

Section: Resultsmentioning

confidence: 99%

“…, 2007; Arzamendia & Giraudo, 2009). Several tropical species have the southernmost limit of their geographical distribution in this node (Giraudo et al. , 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, the biota of these rivers has tropical elements that contrast with those of the xerophilous forests and temperate steppes through which the rivers run (Nores et al. , 2005; Giraudo et al. , 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The effects of human activities on snakes are poorly known (Dodd, 1993; Reed & Shine, 2002), but generally the snakes are systematically persecuted and killed by the man, despite being important animals in ecosystems for their role as predators (Akani et al. , 2003; Giraudo et al. , 2007; López & Giraudo, 2008).…”

Section: Introductionmentioning

confidence: 99%

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A panbiogeographical model to prioritize areas for conservation along large rivers

Arzamendia

Giraudo

2011

Diversity and Distributions

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Aim The large rivers of the Neotropics are considered areas of high diversity and endemism, which play an important role in the distribution patterns and evolution of Neotropical biota. Several methods have been proposed for prioritizing terrestrial conservation areas, but there has been little effort to develop models for river systems. We propose a panbiogeographical approach to identify priority areas for conservation along rivers. Location The Plata Basin rivers. Methods We compared the individual tracks (IT) of 96 snake taxa and identified the species associated with rivers using the concept of preferential direction of distribution. For each taxon, we measured the angular deviations between the line of its IT and the course of the rivers on a 100 × 100 km scaled grid. Average angular values < 45° indicated a positive association with rivers. We detected 35 taxa associated with rivers, and their IT were used to determine the generalized tracks (GT) and nodes. We applied a complementarity algorithm to identify the minimum set of nodes required to represent all species. Results Six nodes were found. The region where the High and Upper Paraná Rivers converge (Node 1) is of first priority, with 60 of 96 species. The second priority is the Lower Paraguay River and northern section of Middle Paraná River (Node 2). The third is the High Paraná, which together with Nodes 1 and 2, comprises 94% of the total species. The fourth and fifth are the High and Middle Uruguay, and the western section of the Upper Paraná and Iberá Marsh system, respectively. These five nodes include all species. Main conclusions Our results highlight the areas of particular interest for the conservation of rivers and provide a biogeographical algorithm for detecting priority conservation areas. The nodes are a biogeographical approach that allows evolutionary and ecological traits to be included in conservation assessment.

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Section: Discussionsupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

“…, 2007; Arzamendia & Giraudo, 2009). Several tropical species have the southernmost limit of their geographical distribution in this node (Giraudo et al. , 2007).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A panbiogeographical model to prioritize areas for conservation along large rivers

Arzamendia

Giraudo

2011

Diversity and Distributions

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Is xenodontine snake reproduction shaped by ancestry, more than by ecology?

Bellini

Arzamendia

Giraudo

2016

Ecology and Evolution

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One of the current challenges of evolutionary ecology is to understand the effects of phylogenetic history (PH) and/or ecological factors (EF) on the life‐history traits of the species. Here, the effects of environment and phylogeny are tested for the first time on the reproductive biology of South American xenodontine snakes. We studied 60% of the tribes of this endemic and most representative clade in a temperate region of South America. A comparative method (canonical phylogenetic ordination—CPO) was used to find the relative contributions of EF and PH upon life‐history aspects of snakes, comparing the reproductive mode, mean fecundity, reproductive potential, and frequency of nearly 1,000 specimens. CPO analysis showed that PH or ancestry explained most of the variation in reproduction, whereas EF explained little of this variation. The reproductive traits under study are suggested to have a strong phylogenetic signal in this clade, the ancestry playing a big role in reproduction. The EF also influenced the reproduction of South American xenodontines, although to a lesser extent. Our finding provides new evidence of how the evolutionary history is embodied in the traits of living species.

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