Iberian–Balearic fern regions and their explanatory variables

Saiz, Juan Carlos Moreno; Lobo, Jorge M.

doi:10.1007/s11258-008-9399-9

Cited by 4 publications

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“…The current Iberian populations of these species are very small and their distributions fragmented, mostly over areas where the reigning climatic conditions differ somewhat from those of the more general regime (Costa Tenorio et al. , 1997; Moreno Saiz & Lobo, 2008). Their persistence is explained by their occupation, both now and in the past, of enclaves acting as climatic refugia (García Antón et al.…”

Section: Introductionmentioning

confidence: 99%

A Quaternary perspective on the conservation prospects of the Tertiary relict tree Prunus lusitanica L.

Calleja

Garzón

Ollero

2009

Journal of Biogeography

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Aim To assess the importance of climate and human pressure as factors limiting the past, present and future distribution of Prunus lusitanica L. (the Portuguese laurel), a relict of Europe’s ancient subtropical laurel‐forest flora. Location The Iberian Peninsula. Methods A census was taken of the current populations of P. lusitanica in the Iberian Peninsula and the threats they face. The potential distribution of the species was modelled under current climatic conditions and under simulations of the climate for the Last Glacial Maximum (LGM), the mid‐Holocene and the year 2080. Results The present total population of 31,000 individuals is largely distributed as small, fragmented subpopulations, often threatened by agriculture or forestry. The species’ current range is much smaller than its potentially suitable range. During the LGM, P. lusitanica would have been constrained to a limited number of sites along the Atlantic coast. In the mid‐Holocene, its potential range was much wider than during the LGM and similar to that of the present day. Under the 2080 climate scenario its potential range is reduced by almost 40% compared to that of the present. This reduction includes the loss of territories currently home to three‐quarters of its Iberian population. Main conclusions Drastic climatic changes and the existence of refugia are usually invoked to explain the rarity and fragmented distribution – yet persistence – of a subtropical flora in southern Europe. The availability of climatically suitable habitats is, however, not necessarily the main factor limiting its distribution. Human impact would appear to have been – and continues to be – of fundamental importance in the current population sizes and potential range of P. lusitanica in the Iberian Peninsula.

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Section: Introductionmentioning

confidence: 99%

A Quaternary perspective on the conservation prospects of the Tertiary relict tree Prunus lusitanica L.

Calleja

Garzón

Ollero

2009

Journal of Biogeography

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“…): the northern coast (9a), Galician‐León mountain ranges (9b), northern Portugal (9c), and the inland acidic mountains from the Central System to the Toledo Mountains (9d). Pteridophytes show a similar distributional pattern (Moreno Saiz & Lobo, ), and Bolòs () proposed a similar Carpetanian–Atlantic territory, although previous regionalizations have never related the Cantabrian coast to the rest of this sector. Finally, a small sector at the base of the dendrogram clusters some grid cells from the South Plateau that have a long history of agriculture and cattle rearing. The few remaining natural areas here have probably discouraged floristic studies that would provide a better understanding of the sector's relationships to other Iberian sectors.…”

Section: Resultsmentioning

confidence: 99%

“…This sector somewhat resembles the Andalusian pteridological region of Moreno Saiz & Lobo (), a territory characterized by some relictual taxa and a large number of fern species. Environmental factors explain less variability here than in the rest of south‐western Europe, so historical constraints may have played an important role (Moreno Saiz & Lobo, ).…”

Section: Discussionmentioning

confidence: 97%

“…the elevations of Ronda and Grazalema, which stood separated from the rest of the Baetic System by a depression (the present valley of the Guadalhorce River), during the lower Messinian (Medina‐Cazorla et al ., ). This sector somewhat resembles the Andalusian pteridological region of Moreno Saiz & Lobo (), a territory characterized by some relictual taxa and a large number of fern species. Environmental factors explain less variability here than in the rest of south‐western Europe, so historical constraints may have played an important role (Moreno Saiz & Lobo, ).…”

Section: Discussionmentioning

confidence: 99%

“…For example, 25% of the Mediterranean glacial refugia identified by Médail & Diadema () are located in Iberia and the Balearic Islands. Biogeographical analyses of the Iberian Peninsula together with the Balearic archipelago have been carried out to establish spatial patterns using different taxonomic groups (i.e. Sainz Ollero & Hernández Bermejo, ; García Barros et al ., ; Rivas‐Martínez et al ., ; Carrascal & Lobo, ; Moreno Saiz & Lobo, ; Romo & García‐Barros, ; see Table ). However, other authors have studied Iberia separately to avoid the complications that inclusion of species of the archipelago may create (Márquez et al ., , ; Vargas et al ., ). Previous studies of south‐western Europe were based on incomplete or insufficiently large datasets, representing fewer taxa and so did not include the full range of plant biodiversity.…”

Section: Introductionmentioning

confidence: 98%

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New insights into the biogeography of south‐western Europe: spatial patterns from vascular plants using cluster analysis and parsimony

Saiz

Donato

Katinas

et al. 2012

Journal of Biogeography

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Aim We analysed the distributional pattern of the vascular flora of the Iberian Peninsula and Balearic archipelago using cluster and parsimony methods to delineate a biogeographical scheme for south‐western Europe and to compare the results with previous regionalizations. Additionally, we aim to identify areas of endemism. Location South‐western Europe (Iberian Peninsula and the Balearic Islands). Methods Pattern analysis of a chorological dataset, consisting of the occurrences of 3041 vascular plant species in each of the 50 km × 50 km UTM cells of a grid covering Iberia and the Balearic Islands, was based on cluster analysis (unweighted pair‐group method using arithmetic averages; UPGMA) and parsimony analysis of endemicity (PAE). The Jaccard similarity index was used in the UPGMA, and the set of most parsimonious trees from the PAE were summarized in a 75% majority consensus tree. Results The UPGMA dendrogram delineated two main branches in the study region: (1) an eastern area of six sectors including the Balearic Islands plus those regions of Iberia with basic substrates, and (2) a western area with three sectors comprising the regions with acidic soils. The majority rule consensus tree of 53 most parsimonious trees from PAE showed eight main clades similarly separating eastern Iberia plus the Balearic Islands with their basic substrates, from western Iberia with its acidic and basic substrates; in addition the PAE tree showed some previously undetected chorological patterns. Main conclusions The use of large and inclusive datasets allows for the recognition of different spatial patterns from those obtained using a limited number of endemic or indicator species. The analyses support some floristic regions previously recognized for Iberia, but not the classic Eurosiberian–Mediterranean division, and some transition territories. Our recognition of 19 areas of endemism consisting of two or more cells and 60 consisting of one cell in south‐western Europe is new.

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Biogeographic regions of the Iberian Peninsula: butterflies as biogeographical indicators

Romo

García‐Barros

2010

Journal of Zoology

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The objective definition of geographic regions based on biotic criteria is useful for summarizing biodiversity as well as for predicting the geographically differential effects of general trends and for planning an adequate distribution of the protected areas. We propose a regionalization of the Ibero-Balearic area based on butterfly presence-absence data and a synthesis of several clustering methods (similarity, parsimony analysis and multivariate techniques), and characterize the sub-regions on the basis of diagnostic species. Seven regions are proposed. The results showed two basic gradients, which apparently lead the butterfly species distributions within the study area: a north-east-south-west one, related to altitude and species richness, and a west-east one, implying a humidity or lithologic gradient. The Balearic Islands remain as an independent region in all cases. The observed divisions probably reflect the distribution of species richness in the study area. Characteristic species for each of the regions were identified using a numerical preference index. The network of protected areas is well represented in all of the sectors proposed, although three of the proposed sub-sectors are under-represented if sampling effort is taken into consideration.

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Iberian–Balearic fern regions and their explanatory variables

Abstract: Figure 8 along with its legends were incorrectly published with errors in the original publication.This erratum corrects Figure 8 and its legend accordingly.The online version of the original article can be found under

Cited by 4 publications

References 0 publications

A Quaternary perspective on the conservation prospects of the Tertiary relict tree Prunus lusitanica L.

A Quaternary perspective on the conservation prospects of the Tertiary relict tree Prunus lusitanica L.

New insights into the biogeography of south‐western Europe: spatial patterns from vascular plants using cluster analysis and parsimony

Biogeographic regions of the Iberian Peninsula: butterflies as biogeographical indicators

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