Delimitation of Biogeographical Areas in the Iberian Peninsula on the Basis of Helicoidea Species (Pulmonata: Stylommatophora)

Puente, A. I.; Altonaga, Kepa; Prieto, Carlos E.; Rallo, Ana

doi:10.2307/2997813

Cited by 16 publications

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“…In studies of geographical pattern of species richness, a commonly used approach has been to map species counts in grid cells, and then to use numerical methods such as clustering algorithms to classify grid cells, or to detect centres or hotspots of species richness (Hnatiuk & Pedley, 1985; Hnatiuk & Maslin, 1988; Lawton et al ., 1994; Cope & Simon, 1995; Lamont & Connell, 1996; Puente et al ., 1998; Saiz et al ., 1998). This approach has seldom been used with measures of endemism.…”

Section: Introductionmentioning

confidence: 99%

Endemism in the Australian flora

Crisp

Laffan

Linder

et al. 2001

Journal of Biogeography

659

739

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Aim To detect centres of vascular plant endemism at a continental scale by analysis of specimen‐based distributional data and to relate any pattern to environmental factors and history. Location Australia. Methods Presence of 8468 seed plant species‐level taxa throughout continental Australia and Tasmania was mapped on a 1° grid to visualize the pattern of species richness. This sample comprises half the known flora. Three indices of endemism were calculated but we preferred one that is unrelated to species richness, so that these two concepts could be distinguished in practice. Centres of endemism were detected by simple mapping and by spatial autocorrelation analysis (SAC). Linear regression was used to examine the relationship of the patterns of species richness and endemism to latitude, topography and climate. Results Both species richness and endemism vary greatly across the continent but in most cases the same centres were high in both richness and endemism. Twelve distinct centres were identified. The major centres of both diversity and endemism are south‐west western Australia, the Border Ranges between New South Wales and Queensland, the Wet Tropics near Cairns, Tasmania and the Iron‐McIlwraith Range of eastern Cape York Peninsula. The last centre appears to be more significant than recognized by past authors. Whether this is a true Australian centre of endemism, or is largely an outlier of the flora of Papua New Guinea, is explored. Another centre, in the Adelaide–Kangaroo Island region, has been overlooked altogether by previous authors. Regression analysis did not find a simple climatic explanation of the observed patterns. There was a suggestion that topographic variation within the 1° cells may be positively correlated with endemism, which is consistent with mountainous regions functioning as refugia. One clear result is that all the major centres of endemism are near‐coastal. A likely explanation is that Pleistocene expansions of the central desert have been a powerful limitation on the viability of refugia for narrowly endemic species. All the centres of endemism lie outside the estimated limits of the expanded arid zone at the last glacial maximum (18,000 yr BP). In particular, the ‘Central Australian Mountain Ranges centre of plant diversity and endemism’ of Boden & Given (1995) is detected as a strong centre of species richness, but not at all as a centre of endemism. This is despite good sampling of this region. Main conclusions Endemism can be distinguished from species richness by using an appropriate index and mapping of such indices can detect centres of endemism. This study demonstrates the value of specimen based distributional data, such as is held in state herbaria and museums.

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Section: Introductionmentioning

confidence: 99%

Endemism in the Australian flora

Crisp

Laffan

Linder

et al. 2001

Journal of Biogeography

659

739

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“…There have been considerable advances in the understanding of this diversity in recent years, both in documenting biogeographical patterns (e.g. Doadrio, 1988;Dennis et al, 1998;Puente et al, 1998;Vargas et al, 1998;Ribera, 2000;García-Barros et al, 2002) and in establishing the origin of selected Iberian taxa and their phylogenetic and phylogeographic relationships, mainly with molecular methods (e.g. Ferris et al, 1998;Frati et al, 1998;Arntzen & Wallis, 1999;García-París & Jockusch, 1999;Lenk et al, 1999;Alexandrino et al, 2000;Gómez-Zurita et al, 2000;Machordom et al, 2000;Oliverio et al, 2000;Seddon et al, 2001;Branco et al, 2002;Ribera et al, 2003a;see Hewitt, 1999, 2000 for reviews).…”

Section: Introductionmentioning

confidence: 99%

Are Iberian endemics Iberian? A case-study using water beetles of family Dytiscidae (Coleoptera)

Ribera¹

2003

GRAELLSIA

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The phylogenetic relationships and the geographical origin of 27 of the 34 species and of 3 of the 9 subspecies of Iberian endemic Dytiscidae are studied, based on species level phylogenies constructed with two mitochondrial gene fragments (16S rRNA and Cytochrome Oxidase I). All Iberian endemic species for which more than one specimen was included were monophyletic with the exception of the complex Deronectes aubei sanfilippoi Fery & Brancucci, 1997-D. delarouzei (Jac. Du Val, 1857 (Sharp, 1872) and Hydroporus normandi normandi Régimbart, 1903 do not form well characterised lineages, as measured with the mitochondrial markers used in this study.The Iberian endemic species of Dytiscidae are divided in three groups according to the type of vicariant origin: 1) within-Iberian species, when the sister species (or clade) of the Iberian endemic is also and Iberian endemic; 2) Iberian/European, when the sister occurs in Europe north of the Pyrenees; and 3) Iberian/North African, when the sister occurs in North Africa. Within-Iberian endemics are found to be on average older than Iberian/European and Iberian/North African species, they have more restricted distributions within the Iberian peninsula (they occur typically in only one of the main biogeographical regions), and tend to occur exclusively in running waters. The withinIberian species are best represented by the "Iberian" clade of the genus Deronectes, formed by six endemic species plus two species with wider distributions. Most species in this group originated in rapid succession in the Late Miocene-Early Pliocene boundary by repeated vicariant events in the three main mountain massifs in the Iberian peninsula: the Pyrenees, the Baetic ranges, and the Sistema Central plus mountain massifs of the NW. On the contrary, most of the Iberian/European species seem to be the recent (Pleistocene) vicariants of a species with a widespread distribution encompassing the Iberian peninsula, at present restricted to south and west of the Ebro valley. The results of these analyses suggest that the Iberian peninsula was an isolated refuge during the Quaternary glaciations, in where allopatric speciation was frequent among some lineages of Dytiscidae diving beetles.

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“…Dichas regionalizaciones han utilizado la información biológica disponible sobre plantas y vertebrados (Sainz Ollero & Hernández Bermejo, 1985;Doadrio, 1988;Real et al 1992Real et al y 1996Palomo et al, 1994;Moreno Saiz et al, 1998;Vargas et al, 1998;Márquez et al, 2001;García-Barros et al, 2002), pero una característica común de estos estudios es la ausencia de análisis que permitan conocer si los inventarios de cada unidad territorial son el resultado de un esfuerzo de colecta lo suficientemente intenso y son, por lo tanto, fiables. Debido a ello, la información corológica disponible sobre los invertebrados es rara vez utilizada para este propósito (ver, sin embargo, Viejo et al, 1992;Hermida et al, 1994;Rodríguez et al, 1997;Puente et al, 1998). Estimar la variación faunística de un grupo de organismos en un territorio requiere utilizar la información disponible sobre la distribución de las especies.…”

Section: Introductionunclassified

Una estrategia para obtener regionalizaciones bióticas fiables a partir de datos incompletos: el caso de los escarabeidos (Coleoptera, Scarabaeinae) ibérico-baleares

Hortal¹,

Lobo²,

Martín-Piera³

2003

GRAELLSIA

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RESUMENSe presenta un método para obtener regionalizaciones basadas en los organismos a partir de datos corológicos incompletos, utilizando como ejemplo los escarabeidos ibéricos (Col., Scarabaeinae). A partir de las unidades territoriales bien muestreadas, realizamos en primer lugar un análisis de ordenación, en el que se identificaron cuatro ejes faunísticos. Posteriormente, los valores de estos ejes se extrapolaron a todo el territorio ibérico mediante Modelos Lineales Generalizados. Con los valores predichos para estos ejes se desarrolló una matriz de distancias faunísticas. A partir de ella, y de las distancias geográficas entre unidades territoriales, se obtuvo una nueva matriz de distancias faunístico-geográficas. Esta matriz fue utilizada para realizar la clasificación final de todo el territorio, obteniéndose ocho regiones faunísticas diferentes. Finalmente, se comentan los resultados obtenidos, identificando las diferencias en su composición y riqueza regional y local. Palabras clave: regionalización, clasificación, ordenación, modelos predictivos, Scarabaeinae, Península Ibérica. ABSTRACTA strategy to obtain reliable biotic regionalizations from incomplete data: the case of IberoBalearic dung beetles (Coleoptera, Scarabaeinae)A method to obtain regionalizations based in the organisms from incomplete distributional data is presented, using Iberian scarabaeine (Col., Scarabaeinae) as an example. A first ordination analysis was carried out using the well-sampled territorial units, where four faunistic axes were identified. Then, the scores of these axes were extrapolated to the whole Iberian territory by means of General Linear Modelling. A faunistic distance matrix was developed using the predicted values for the four axes. Using this matrix and the geographic distances among territorial units, a new matrix, reflecting both the compositional and geographic distances was obtained. This matrix was used to carry out the final classification of all the territory, where eight different faunistic regions were obtained. Finally, the results are briefly discussed, and their composition and local and regional richness are described.

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Delimitation of Biogeographical Areas in the Iberian Peninsula on the Basis of Helicoidea Species (Pulmonata: Stylommatophora)

Cited by 16 publications

References 0 publications

Endemism in the Australian flora

Endemism in the Australian flora

Are Iberian endemics Iberian? A case-study using water beetles of family Dytiscidae (Coleoptera)

Una estrategia para obtener regionalizaciones bióticas fiables a partir de datos incompletos: el caso de los escarabeidos (Coleoptera, Scarabaeinae) ibérico-baleares

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