Patrones de distribución en la flora liquénica xerófila del Sureste de España

Egea, J. M.; Alonso, F. Luis

doi:10.24310/abm.v21i0.8665

Cited by 14 publications

(10 citation statements)

References 7 publications

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“…Plant species that show an extreme East-West disjunction in the Mediterranean region have been noticed for a long time (Engler, 1879;Willkomm, 1896;Braun-Blanquet & Bolòs, 1957;Davis & Hedge, 1971). More recently, also some examples of disjunctly distributed lichens were reported in the literature (Barreno, 1991;Egea & Alonso, 1996). Additional striking examples come from studies of cave-dwelling Crustaceae (Brehm, 1947), freshwater zooplankton (Miracle, 1982), Coleoptera (Sanmartin, 2003) and from a detailed survey of the insect fauna of the central Monegros region of Spain which listed 62 species showing a disjunct distribution between NE Spain and the steppes in the eastern Mediterranean area or Central Asia (Ribera & Blasco-Zumeta, 1998).…”

Section: Introductionmentioning

confidence: 93%

<i>Microcnemum coralloides</i> (Chenopodiaceae- Salicornioideae): an example of intraspecific East-West disjunctions in the Mediterranean region

Kadereit¹,

Yaprak²

2008

Anal. Jard. Bot. Madr.

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Kadereit, G. & A.E. Yaprak. 2008. Microcnemum coralloides (Chenopodiaceae-Salicornioideae): an example of intraspecific East-West disjunctions in the Mediterranean region. Anales Jard. Bot. Madrid 65(2): 415-426. Microcnemum is a monotypic genus of Salicornioideae comprising rare, annual, hygrohalophytic herbs growing in hypersaline inland lagoons and salt pans. Microcnemum coralloides shows an East-West disjunction in the Mediterranean region: M. coralloides subsp. coralloides occurs in central and eastern Spain while M. coralloides subsp. anatolicum grows in Turkey, Syria, Armenia and Iran. We studied the phylogeny, biogeography and morphological differentiation of M. coralloides. Molecular analyses, using five western and eight eastern accessions of the species, were based on three different markers (nuclear ITS and plastid atpB-rbcL spacer and trnT/F region) analysed with Maximum Parsimony and Maximum Likelihood. Estimates of divergence times were calculated using a Likelihood Ratio Test (LRT) and the Penalized Likelihood (PL) method. The two subspecies can be clearly distinguished by their different seed testa surface. Other diagnostic characters were not found. The molecular data (ITS and ML analysis of the trnT/F region) indicate that M. coralloides subsp. coralloides originated from within M. coralloides subsp. anatolicum which implies an East Mediterranean origin and subsequent westward dispersal. Age estimates for the split of the two subspecies range from 2.8-0.5 million years ago. Considering the relatively low genetic differentiation and the low crown group age (0.7-0.1 mya) of M. coralloides subsp. coralloides in comparison to M. coralloides subsp. anatolicum we favour the hypothesis that the Iberian part of the species range was established during cold periods of the Early Pleistocene and that the range of the species was fragmented during a warmer period soon after its arrival in Iberia.

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Section: Introductionmentioning

confidence: 93%

<i>Microcnemum coralloides</i> (Chenopodiaceae- Salicornioideae): an example of intraspecific East-West disjunctions in the Mediterranean region

Kadereit¹,

Yaprak²

2008

Anal. Jard. Bot. Madr.

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“…The short‐distance seed dispersal of gypsophiles is responsible for the high number of very narrow endemisms typical of gypsum outcrops (Escudero et al , 2000 b ; Mota et al , ) and suggests that gypsum species are evolutionarily old taxa due to the long time they need to colonize isolated outcrops by chance (Moore & Jansen, ). Consequently, several authors have suggested that some Iberian gypsophiles (including plants as well as lichens and bryophytes) have a pre‐Pleistocene origin with disjoint distributions between the west/east Mediterranean and central Asian regions (Braun‐Blanquet & Bolòs, ; Barreno, ; Egea & Alonso, ). Interestingly, there seems to be a perfect match between the distribution of some insects and their host gypsophiles in these areas which are nowadays disconnected (Ribera & Blasco‐Zumeta, ).…”

Section: Evolution and Biogeography Of Gypsophilesmentioning

confidence: 99%

Plant life on gypsum: a review of its multiple facets

et al. 2014

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The adaptation of plants to particular soil types has long intrigued biologists. Gypsum soils occupy large areas in many regions of the world and host a striking biological diversity, but their vegetation has been much less studied than that developing over serpentine or saline soils. Herein, we review all aspects of plant life on gypsum ecosystems, discuss the main processes driving their structure and functioning, and highlight the main conservation threats that they face. Plant communities in gypsum habitats typically show distinctive bands at very small spatial scales, which are mainly determined by topography. Plants living on gypsum soils can be classified into three categories: (i) wide gypsophiles are specialists that can penetrate the physical soil crust during early life stages and have physiological adjustments to cope with the chemical limitations imposed by gypsum soils; (ii) narrow gypsophiles are refugee plants which successfully deal with the physical soil crust and can tolerate these chemical limitations but do not show specific adaptations for this type of soils; and (iii) gypsovags are non-specialist gypsum plants that can only thrive in gypsum soils when the physical crust is absent or reduced. Their ability to survive in gypsum soils may also be mediated by below-ground interactions with soil microorganisms. Gypsophiles and gypsovags show efficient germination at low temperatures, seed and fruit heteromorphism within and among populations, and variation in seed dormancy among plants and populations. In gypsum ecosystems, spatio-temporal changes in the composition and structure of above-ground vegetation are closely related to those of the soil seed bank. Biological soil crusts (BSCs) dominated by cyanobacteria, lichens and mosses are conspicuous in gypsum environments worldwide, and are important drivers of ecosystem processes such as carbon and nitrogen cycling, water infiltration and run-off and soil stability. These organisms are also important determinants of the structure of annual plant communities living on gypsum soils. The short-distance seed dispersal of gypsophiles is responsible for the high number of very narrow endemisms typically found in gypsum outcrops, and suggests that these species are evolutionarily old taxa due to the time they need to colonize isolated gypsum outcrops by chance. Climate change and habitat fragmentation negatively affect both plants and BSCs in gypsum habitats, and are among the major threats to these ecosystems. Gypsum habitats and specialists offer the chance to advance our knowledge on restrictive soils, and are ideal models not only to test important evolutionary questions such as tolerance to low Ca/Mg proportions in soils, but also to improve the theoretical framework of community ecology and ecosystem functioning.

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“…Lumbsch. (= steppicus ), steppe species distributed in the central Ebro valley, the Negev desert, and areas with gypsum soils in Crimea and other Caspian republics, a pattern found among several Mediterranean − Turanian gypsiferous species (Llimona, 1973; Egea & Alonso, 1996; J. Etayo, unpublished data). There are other numerous examples of biogeographical links between the flora of NW Africa (some species extending their distribution to the Iberian Peninsula) with SW and central Asia, and the favoured explanation is that present populations (of the same or related vicariant species) are the remnants of former continuous distributions across the central and southern Palaearctic region during most of the Late Tertiary (Davis & Hedge, 1971).…”

Section: Introductionmentioning

confidence: 99%

“…The pre‐Pleistocene origin of at least some of the disjunct distributions of plants is now generally accepted (e.g. Braun‐Blanquet & BoloÂs et al ., 1957; Davis & Hedge, 1971; Thorne, 1972; Willis, 1996; or Barreno, 1991 and Egea & Alonso, 1996 for bryophytes and lichens), but the examples of animal species are more controversial, with many still unresolved biogeographical links between the fauna of the Iberian Peninsula, north Africa, the eastern Mediterranean, and Asia (see, e.g. López Martínez, 1989).…”

Section: Introductionmentioning

confidence: 99%

Biogeographical links between steppe insects in the Monegros region (Aragón, NE Spain), the eastern Mediterranean, and central Asia

Ribera¹,

Blasco-Zumeta²

1998

Journal of Biogeography

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Sixty‐two species of insects in thirty‐six families and nine orders, plus one species of Acari, were found to have disjunct distributions, or to belong to species groups with disjunct distributions, between the steppe areas in the central Monegros region (NE Spain) and the steppes in the eastern Mediterranean or central Asia. The accumulation of examples of a wide range of taxonomic groups, and the phyletic links of apparent endemic species of the central Ebro valley with eastern species, are considered to support the pre‐Pleistocene origin of their relict distributions, associated with the persistence of steppe habitats over gypsiferous soils in the area since the Late Tertiary. The case of disjunct distributions of phytophages and their parasitoids on plants with disjunct distributions themselves, such as Krascheninnikovia ceratoides (L.) Gueldenst. (Chenopodiaceae) or the Juniperus thurifera L. −J. excelsa Bieb. complex (Cupressaceae), would seem to provide strong evidence supporting the continuity of their presence in the central Ebro valley through the Quaternary.

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Patrones de distribución en la flora liquénica xerófila del Sureste de España

Cited by 14 publications

References 7 publications

<i>Microcnemum coralloides</i> (Chenopodiaceae- Salicornioideae): an example of intraspecific East-West disjunctions in the Mediterranean region

<i>Microcnemum coralloides</i> (Chenopodiaceae- Salicornioideae): an example of intraspecific East-West disjunctions in the Mediterranean region

Plant life on gypsum: a review of its multiple facets

Biogeographical links between steppe insects in the Monegros region (Aragón, NE Spain), the eastern Mediterranean, and central Asia

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