Biogeographical zonation of the western Iberian peninsula on the basis of the distribution of earthworm species

Rodriguez, T.; Trigo, Dolores; Cosín, Darío J. Díaz

doi:10.1046/j.1365-2699.1997.00112.x

Cited by 21 publications

(6 citation statements)

References 3 publications

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“…The zoogeographical zonation is different for each group considered, but as a general pattern Eurosiberian faunas occupy areas that Rivas-Martínez (1987) includes in the Mediterranean region in his classification of Iberian vegetation, a pattern also pointed out by Hermida et al (1994) for western Iberian gastropods, Rodríguez et al (1997) for western Iberian earthworms and Hortal-Muñoz et al (2000) for Portuguese dung beetles. As Williams (1996) comments, the arbitrary "border lines" between biogeographic regions are not realistic representations of the ecological reality, because they can be wider than the grain used for their delimitation.…”

Section: Discussionmentioning

confidence: 96%

Diversity of Chrysomelidae (Coleoptera) at a mountain range in the limit of the Eurosiberian region, northwest Spain: species richness and beta diversity

Baselga

Novoa

2007

Entomol. Fennica

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Chrysomelidae from the Sierra de Queixa mountains (Galicia, northwest Spain) were sampled, reporting 93 species. The estimated local species richness using several non-parametric estimators and accumulation models varies between 104 and 142 species. To compare the Chrysomelidae fauna from Sierra de Queixa with other Galician assemblages we have assessed beta diversity among inventories and we have tested the differences on the zoogeographic compositions among areas. Sierra de Queixa is grouped with other Galician mountain ranges located in the transition zone between Eurosiberian and Mediterranean regions, and it is characterised by a high proportion of Iberian endemic species, significantly higher than expected. Therefore, Chrysomelidae fauna from Sierra de Queixa represents a unique assemblage of Eurosiberian elements that reached the area due to the climatic conditions and Iberian endemic species that are present in the Iberian mountains due to its historic role as southern refugia during glaciations.

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Section: Discussionmentioning

confidence: 96%

Diversity of Chrysomelidae (Coleoptera) at a mountain range in the limit of the Eurosiberian region, northwest Spain: species richness and beta diversity

Baselga

Novoa

2007

Entomol. Fennica

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“…They suggested that transition zones between Mediterranean and Atlantic regions are characterised by mean annual precipitation in the range of 700-1000 mm. Moreover, several studies on earthworms showed genetic differences between Eurosiberian and Mediterranean regions in the Iberian Peninsula (Fernández et al, 2012(Fernández et al, , 2015Rodriguez et al, 1997). Phylogeographic studies can help determine the history of the diversification and dispersal of a species.…”

Section: Introductionmentioning

confidence: 99%

Phylogeography of a riparian earthworm shows environmental factors influence genetic structure

Sosa

Marchán

Novo

et al. 2022

Journal of Biogeography

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Aim The study of cosmopolitan earthworms could be even more interesting than that of endemic species in revealing evolutionary processes. Previous research on the cosmopolitan worm Eiseniella tetraedra has indicated some phylogeographic structure among populations, but the factors responsible remain unresolved. We hypothesized that environmental factors and dispersal have shaped the distribution of the species' lineages. Location Spain and Portugal; Iberian Peninsula. Taxon Eiseniella tetraedra (Lumbricidae, Oligochaeta, Annelida). Methods We collected 739 specimens of Eiseniella tetraedra from 65 localities around the Iberian Peninsula between 2012 and 2016. We performed phylogenetic analysis (Bayesian Inference and maximum likelihood) using two mitochondrial (COI and 16S) and one nuclear marker (28S). Furthermore, we studied their genetic diversity and historic demography based on the COI gene. Correlations between genetic diversity and 22 environmental factors were tested. Results Eiseniella tetraedra showed high diversity in the Iberian Peninsula, with eight different lineages nested in two clades. We found lineages mostly restricted to the northern region, while others were distributed throughout the Iberian Peninsula. Habitat stability, that is, constant availability or lack of water, also correlated with genetic diversity. Thus, although no clear phylogeographic pattern was found, environmental factors (such as precipitation, temperature, and soil pH) and habitat stability influenced the distribution of genetic variability. Main Conclusions Eiseniella tetraedra is an earthworm with great genetic variability. We show that the ranges of species with high relative dispersal ability and ambiguous phylogeographic patterns may be better explained by influence of environmental conditions rather than specific geographic features. Adaptation to unstable conditions has been shown to confer more success on one of the two major genetic clades recovered, pointing to ecological plasticity as a key for evolutionary success.

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“…In fact, several of the modern populations of the species reside in areas that have been suggested to serve as glacial refugia, on the basis of the distribution of many different plant and animal species (namely Serra da Estrela, and the western and eastern parts of the Cantabrian Mountain Range [68], [75]). Thus, the often-cited subdivision of I. monticola into I. m. monticola at Serra da Estrela, and I. m. cantabrica elsewhere, falls too short to describe the actual pattern of diversification within this species.…”

Section: Discussionmentioning

confidence: 99%

Causes and Evolutionary Consequences of Population Subdivision of an Iberian Mountain Lizard, Iberolacerta monticola

et al. 2013

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AimThe study of the factors that influence population connectivity and spatial distribution of genetic variation is crucial for understanding speciation and for predicting the effects of landscape modification and habitat fragmentation, which are considered severe threats to global biodiversity. This dual perspective is obtained from analyses of subalpine mountain species, whose present distribution may have been shaped both by cyclical climate changes over ice ages and anthropogenic perturbations of their habitats. Here, we examine the phylogeography, population structure and genetic diversity of the lacertid lizard Iberolacerta monticola, an endemism considered to be facing a high risk of extinction in several populations.LocationNorthwestern quadrant of the Iberian Peninsula.MethodsWe analyzed the mtDNA variation at the control region (454 bp) and the cytochrome b (598 bp) loci, as well as at 10 nuclear microsatellite loci from 17 populations throughout the distribution range of the species.ResultsAccording to nuclear markers, most sampling sites are defined as distinct, genetically differentiated populations, and many of them show traces of recent bottlenecks. Mitochondrial data identify a relatively old, geographically restricted lineage, and four to six younger geographically vicariant sister clades, whose origin may be traced back to the mid-Pleistocene revolution, with several subclades possibly associated to the mid-Bruhnes transition. Geographic range fragmentation of one of these clades, which includes lowland sites, is very recent, and most likely due to the accelerated loss of Atlantic forests by human intervention.Main ConclusionsAltogether, the data fit a “refugia within refugia” model, some lack of pattern uniformity notwithstanding, and suggest that these mountains might be the cradles of new species of Iberolacerta. However, the changes operated during the Holocene severely compromise the long-term survival of those genetic lineages more exposed to the anthropogenic perturbations of their habitats.

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Biogeographical zonation of the western Iberian peninsula on the basis of the distribution of earthworm species

Cited by 21 publications

References 3 publications

Diversity of Chrysomelidae (Coleoptera) at a mountain range in the limit of the Eurosiberian region, northwest Spain: species richness and beta diversity

Diversity of Chrysomelidae (Coleoptera) at a mountain range in the limit of the Eurosiberian region, northwest Spain: species richness and beta diversity

Phylogeography of a riparian earthworm shows environmental factors influence genetic structure

Causes and Evolutionary Consequences of Population Subdivision of an Iberian Mountain Lizard, Iberolacerta monticola

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