An Optimality Criterion to Determine Areas of Endemism

Szumik, Claudia; Cuezzo, Fabiana; Goloboff, Pablo A.; Chalup, Adriana Elizabeth

doi:10.1080/10635150290102483

Cited by 200 publications

(351 citation statements)

References 16 publications

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“…El área de distribución de un taxón está determinada por factores históricos y actuales, por lo tanto, la respuesta simultánea y paralela de los taxones a esos factores debería reflejar concordancia en sus áreas de distribución indicando "áreas de endemismo" (Rosen, 1988;Morrone, 1994;Espinosa et al, 2001;Szumik et al, 2002). Un área de endemismo se define por la congruencia de las áreas de distribución de dos o más especies (Platnick, 1991;Espinosa et al, 2001).…”

Section: Introductionunclassified

Áreas De Endemismo De Los Mamíferos (Mammalia) Neotropicales

Noguera‐Urbano¹,

Escalante

2015

Acta Biol. Colomb.

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RESUMENLa identificación de las áreas de endemismo es un paso fundamental en los análisis de biogeografía evolutiva. Las áreas de endemismo han sido definidas por la congruencia de dos o más áreas de distribución, en donde se asume de manera general que los taxones endémicos tienen una respuesta geográfica similar a factores históricos y ambientales. Los mamíferos tienen alta diversidad en el Neotrópico y muchos de ellos han evolucionado en conjunto con esta región biogeográfica. Sin embargo, hay pocas hipótesis de áreas de endemismo que puedan ser relacionadas con la evolución de los mamíferos en el Neotrópico. En este estudio se identificaron las áreas de endemismo de los mamíferos neotropicales a partir del análisis de una matriz de 2052 taxones (familias, géneros y especies). Para ello se aplicó una búsqueda de áreas de endemismo con el método de Análisis de Endemicidad a una cuadrícula de 2° latitud-longitud. Se identificaron 101 áreas de endemismo y 498 taxones endémicos, las áreas coincidieron parcialmente con 65 patrones biogeográficos identificados por otros autores. La región Neotropical está compuesta por nueve áreas de endemismo y mostró múltiples límites, que sugieren un patrón dinámico. Se identificaron dos áreas complejas de intercambio biótico que coincidieron con las zonas de transición Mexicana y Sudamericana. La congruencia de las áreas de endemismo de mamíferos con otros esquemas biogeográficos sugiere que estas áreas han sido formadas tanto por factores históricos como ecológicos. Por otra parte, las incongruencias de las áreas de endemismo soportan un sistema biogeográfico no jerarquizado.Palabras clave: biogeografía, distribución, diversidad, endemismo, evolución, Neotrópico. ABSTRACTThe identification of areas of endemism is an essential step in analyses of evolutionary biogeography. Areas of endemism have been defined by the congruency of two or more distributional areas, where there is a general assumption that the endemic taxa have a similar geographic response to historical and environmental factors. Mammals are highly diverse in the Neotropics, and most of them have evolved together with that biogeographical region. However, there are few hypotheses of areas of endemism that may be related with the evolution of the mammals in the Neotropics. We analyzed a matrix of 2052 taxa (families, genera and species) to identify the areas of endemism of the Neotropical mammals. The search of areas of endemism was performed using the Analysis of Endemicity method in a grid of 2° latitude -longitude. The analysis resulted in 101 areas and 498 endemic taxa, the areas partially matched with 65 biogeographical patterns previously identified by other authors. The Neotropical region is composed of nine areas of endemism and showed multiples boundaries, these characteristics suggest a dynamic pattern. Two complex areas of biotic interchange corresponded with the Mexican and Southamerican transitional zones. On one side, the congruence of areas of endemism of mammals with other biogeographical patterns s...

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Section: Introductionunclassified

Áreas De Endemismo De Los Mamíferos (Mammalia) Neotropicales

Noguera‐Urbano¹,

Escalante

2015

Acta Biol. Colomb.

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“…The method used to identify the regional patterns of distributional congruence, determined by the distribution of bats in northern Argentina, Bolivia and Paraguay, is that proposed by Szumik et al (2002) and Szumik & Goloboff (2004). This method implements an optimality criterion that explicitly considers the spatial position of the species in the study region.…”

Section: Distributional Analysismentioning

confidence: 99%

“…Several methods have been proposed over the last years to identify AEs (Morrone 1994, Linder 2001, Szumik et al 2002, Szumik & Goloboff 2004, Deo & DeSalle 2006, Giokas & Sfenthourakis 2007, Dos Santos et al 2008. The development of such formalized methods allow biogeographers, not only to evaluate if the traditionally proposed phyto and zoogeographical regions represent coherent units in terms of spatial overlap, but also to discover previously unrecognized regions.…”

Section: Introduction P R O T E C T E D a R E A S S Y S T E M S S H Omentioning

confidence: 99%

“…The development of such formalized methods allow biogeographers, not only to evaluate if the traditionally proposed phyto and zoogeographical regions represent coherent units in terms of spatial overlap, but also to discover previously unrecognized regions. Purposely, Szumik et al (2002) and Szumik & Golobof f (2004) formalized a method that explicitly evaluates the superposition between species geographic ranges by applying an optimality criterion (Szumik & Roig-Juñent 2005).…”

Section: Introduction P R O T E C T E D a R E A S S Y S T E M S S H Omentioning

confidence: 99%

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The Chacoan bat fauna identity: Patterns of distributional congruence and conservation implications

Sandoval

Bárquez

2013

Rev. chil. hist. nat.

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The aim of this paper is to characterize the Chaco thorn-scrub savanna as a unit, biologically defi ned by means of its identifi cation as a regional pattern of distributional congruence, through the evaluation of the utility of bat assemblages as biogeographical indicators of the Chaco at regional scale, and to then evaluate this characterization in terms of the conservation value of this habitat. We have considered the whole territory of Paraguay and Bolivia, and the northern of Argentina; that is the entire Chaco biogeographical province, and part of the surrounding biogeographical provinces. We conducted an exhaustive search and constructed a database consisting in 9509 geo-referenced records showing that the bat fauna of the Chaco is richer than previously reported. We used an optimality criterion to identify patterns of distributional congruence determined by the distribution of bats. We recovered several areas that correspond with the Chaco. The areas that are coincident with the Chaco were supported by eight species: Eptesicus brasiliensis, E. diminutus, Eumops dabbenei, Histiotus velatus, Promops centralis, P. nasutus, Pygoderma bilabiatum, and Tonatia bidens.These results show that bat assemblages are useful as characterizing of regional patterns of distributional congruence. These patterns provide fi rst-step testable hypotheses of areas of endemism for future analyses of neighboring regions or analyses at more inclusive scales. Bat assemblages may be used to characterize the Chaco despite the fact that it was thought this habitat lacked an identity in relation to its bat fauna. The Chacoan nature as a biologically distinctive natural unit is clear now also in terms of regional patterns of distributional congruence of bat species, which provides further evidence for intensifying efforts to protect this endangered habitat.Key words: Chaco, Chiroptera, optimality criterion, patterns of distributional congruence, South America. RESUMENEl objetivo de este trabajo es caracterizar a la provincia biogeográfi ca Chaqueña como una unidad, defi nida biológicamente por medio de su identifi cación como un patrón regional de congruencia distribucional, mediante la evaluación de la utilidad de los ensambles de murciélagos como indicadores biogeográfi cos del Chaco a escala regional, y luego evaluar esta caracterización en términos del valor de conservación de este hábitat. Se consideró el área completa de Paraguay y Bolivia y el norte de Argentina; es decir, toda la provincia biogeográfi ca del Chaco, y parte de las provincias biogeográfi cas que la rodean. Se realizó una búsqueda exhaustiva y se construyó una base de datos consistente en 9509 registros geo-referenciados mostrando que la fauna de murciélagos del Chaco es más rica de lo que se había reportado previamente. Se utilizó un criterio de optimalidad para identifi car los patrones de congruencia distribucional determinados por la distribución de los murciélagos. Se recuperaron varias áreas que se corresponden con el Chaco. Las áreas que son coincide...

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“…Harold & Mooi, 1994;Morrone, 1994;Szumik et al, 2002) are complicated in marine biogeography. The tridimensional nature of the marine realm, the dynamics of currents and oceanic fronts, the difficulties to establish thresholds in ecophysiological continuums and the amazingly diverse strategies of dispersal, all make for a unique definition of areas, or "volumes," of endemism (see Miranda & Marques, 2011).…”

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confidence: 99%

Southern Ocean areas of endemism: a reanalysis using benthic hydroids (Cnidaria, Hydrozoa)

Miranda

Cantero²,

Marques³

2013

lajar

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ABSTRACT. The biogeographic history of the Southern Ocean (SO) fauna is complex and poorly studied, especially the areas of endemism. We reanalyzed the data of Marques & Peña Cantero (2010), along with other geographical records of endemic benthic hydroids below 45ºS. A Parsimony Analysis of Endemicity (PAE) based on 5º latitude by 5º longitude matrix with 61 species resulted in eight areas of endemism. We discuss these results in the context of different hypotheses of the evolution of the SO fauna and previously proposed biogeography patterns.

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An Optimality Criterion to Determine Areas of Endemism

Cited by 200 publications

References 16 publications

Áreas De Endemismo De Los Mamíferos (Mammalia) Neotropicales

Áreas De Endemismo De Los Mamíferos (Mammalia) Neotropicales

The Chacoan bat fauna identity: Patterns of distributional congruence and conservation implications

Southern Ocean areas of endemism: a reanalysis using benthic hydroids (Cnidaria, Hydrozoa)

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