Floristic Traits and Biogeographic Characterization of the Gennargentu Massif (Sardinia)

Bacchetta, Gianluigi; Fenu, Giuseppe; Guarino, Riccardo; Mattana, Efisio; Nieddu, G.; Scudu, Carmine

doi:10.15553/c2012v682a4

Cited by 19 publications

(17 citation statements)

References 23 publications

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“…The biogeographical scheme identified in this study, on the basis of all the Sardinian endemics, was congruent Biogeography of Sardinia Island 183 with the results of partial studies carried out in some floristic territories within the island (Bacchetta & Pontecorvo, 2005;Bacchetta, 2006;Fenu & Bacchetta, 2008;Angius & Bacchetta, 2009;Fenu et al, 2010;Bacchetta et al, 2013), although some minor differences at the subsector level were found. Several units were well defined, not only because of the endemic flora that they shared, but also because they owned a high number of exclusive, differential and indicator endemic taxa.…”

Section: Discussionsupporting

confidence: 82%

“…Our results show that the mountainous subsectors maintain higher endemic species richness compared with lowland ones. Higher endemic-species richness in the mountainous areas could be attributed to increased ecological isolation, altitudinal range or higher habitat diversity (M edail & Qu ezel, 1997;Thompson, 2005;Fenu et al, 2010;Trigas et al, 2012;Bacchetta et al, 2013;Cañadas et al, 2014). In addition, these areas have a high level of naturalness and low human pressure.…”

Section: Discussionmentioning

confidence: 99%

“…Bacchetta & Pontecorvo, 2005;Bacchetta, 2006;Fenu & Bacchetta, 2008;Angius & Bacchetta, 2009;Fenu et al, 2010;Bacchetta et al, 2013); however, the main part of the island (c. 85% of the total surface) still lacks a detailed biogeographical study.…”

Section: Introductionmentioning

confidence: 99%

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Using endemic-plant distribution, geology and geomorphology in biogeography: the case of Sardinia (Mediterranean Basin)

Fenu

Fois

Cañadas

et al. 2014

Systematics and Biodiversity

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The importance of robust systems for classifying biogeographical patterns has been emphasized for its usefulness in\ud designing conservation strategies. For such purposes, the distribution patterns of the endemic flora have often been used.\ud Several studies have identified phytogeographical units within Sardinia (western Mediterranean); however, the main part of\ud the island remains unstudied. Thus, the aim of this study is to lay out a comprehensive biogeographical scheme for Sardinia\ud based on endemic vascular plant distributions, together with geological and geomorphological units. We georeferenced, in\ud a 1-km2 grid cell, the presence of 290 vascular endemic taxa from the literature, herbarium specimens and field\ud investigators’ research. Sardinia was subdivided into 31 homogeneous units through the integration of geological and\ud geomorphological maps and, subsequently, a presence–absence matrix of endemic taxa in each unit was built. Hierarchical\ud cluster analysis was performed to define two levels of biogeographical units (i.e. sectors and subsectors). For each unit the\ud exclusive and differential endemic taxa were identified. For sectors, indicator species were explored by the Indicator Value\ud (Ind Val) analysis and relationships were analysed by quantitative interaction web. A total of six sectors and 22 subsectors\ud were identified. The highest endemic plant richness was found in the Campidanese-Turritano, Sulcitano-Iglesiente and\ud Supramontano sectors, and in the Gennargenteo, Barbaricino, Iglesiente and Sulcitano subsectors. All sectors were\ud characterized by the presence of exclusive, differential and indicator taxa. The interaction analysis showed the highest\ud uniqueness in endemic flora in the Supramontano and Sulcitano-Iglesiente sectors, which hosted a high number of\ud exclusive endemic species. Mostly mountainous sectors/subsectors had higher endemic-species richness compared with\ud lowland ones. The study showed the relevance of geology and geomorphology, together with accurate data on endemic\ud distribution, to define consistent phytogeographical units. Furthermore, the biogeographical scheme presented here helps to\ud define area-based conservation strategies in Sardini

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Using endemic-plant distribution, geology and geomorphology in biogeography: the case of Sardinia (Mediterranean Basin)

Fenu

Fois

Cañadas

et al. 2014

Systematics and Biodiversity

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“…Therefore, to maximize our efforts, we have identified three micro-hotspots on the basis of their high endemic plant richness in Sardinia (Fenu et al 2010;Bacchetta et al 2013;Cañ adas et al 2014). These micro-hotspots not only host more than 20% of regional endemics taxa, but also a high number of narrow endemics which are restricted in distribution to a single micro-hotspot.…”

Section: Monitoring Of Threatened Flora In Sardinia 479mentioning

confidence: 99%

Threatened Sardinian vascular flora: A synthesis of 10 years of monitoring activities

Fenu

Cogoni

Pinna

et al. 2015

Plant Biosystems - An International Journal Dealing with all As

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The in situ conservation activities carried out in the last 10 years on endemic and threatened Sardinian vascular flora were analysed. Monitored species were selected following the policy species (listed in the Habitat Directive) and following the regional responsibility criterion. A monitoring scheme, with three levels of intensity, was applied and economic costs of the monitoring activities were analysed. In the 10-year long field work, 49 taxa corresponding to 50% of policy species and to 22.5% of the Sardinian endemics were monitored. The Sulcitano-Iglesiente sector showed the highest number of monitored taxa (20), whereas the Gennargenteo sector showed the highest number of populations monitored (32). A variation of the relative importance of the three levels of monitoring has been detected and most of the protocols showed a high level of intensity and complexity (90%). Plant-monitoring programmes have been considerably intensified over time with an increase in the total costs; the most important cost was the staff. The economic resources increased significantly over time, both in personnel and travelling costs. Consequently, in order to ensure sufficient support to in situ conservation activities in Sardinia, increased public funding will be necessary.

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“…Insular, mountain and isolated edaphic systems (i.e., ultrabasic and serpentine rocks) generally appear to be major endemic centres (Quézel 1985, Stevanović 2003, Bacchetta et al 2013, Sciandrello et al 2015. Circum-Mediterranean vascular flora owes its taxonomic richness (Médail and Quézel 1997) to its relatively high degree of endemism, varying from 50% (Quézel 1985) to 59% (Greuter 1991) in relation to the taxonomic interpretations of authors.…”

Section: Introductionmentioning

confidence: 99%

The plant endemism in the Maritime and Ligurian Alps

Casazza¹,

Barberis²,

Guerrina³

et al. 2016

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SUMMARYThe Maritime and Ligurian Alps have a flora characterised by a very high number of endemic species in relation to their small geographical extension. This area is considered one of the most important centres of diversification of the Alps and a Mediterranean hotspot of biodiversity. In the last years many studies were performed in order to describe the distribution and phylogeographical patterns of endemism. Despite these studies, Maritime and Ligurian Alps still lack in a broad view about the evolution of endemisms in this area. In this review, we examine the knowledge about the distribution patterns of endemic plant species living in the Maritime and Ligurian Alps in order to identify the evolutionary and biogeographical mechanisms operating on them. INTRODUCTIONThe Mediterranean Basin is one of the world's terrestrial biodiversity hotspots (Quézel 1995, Médail andMyers 2004). This area hosts most of the biodiversity of Europe, but its species richness is threatened by human pressure and climate change (EEA 2010). In particular, habitat fragmentation and global warming have caused changes in the ecosystems structure leaving the ecosystems more vulnerable to invasion by alien species (EEA 2006). For these reasons, there is an urgency to conserve this richness (Blondel and Médail 2009).The great biodiversity of the Mediterranean Basin is primarily due to particular climate conditions, to habitat heterogeneity as a result of paleogeographical and historical factors, and to different origins of the elements of its flora (Quézel 1985, 1995, Nieto Feliner 2014. Insular, mountain and isolated edaphic systems (i.e., ultrabasic and serpentine rocks) generally appear to be major endemic centres (Quézel 1985, Stevanović 2003, Bacchetta et al. 2013, Sciandrello et al. 2015. Circum-Mediterranean vascular flora owes its taxonomic richness (Médail and Quézel 1997) to its relatively high degree of endemism, varying from 50% (Quézel 1985) to 59% (Greuter 1991) in relation to the taxonomic interpretations of authors.

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Floristic Traits and Biogeographic Characterization of the Gennargentu Massif (Sardinia)

Cited by 19 publications

References 23 publications

Using endemic-plant distribution, geology and geomorphology in biogeography: the case of Sardinia (Mediterranean Basin)

Using endemic-plant distribution, geology and geomorphology in biogeography: the case of Sardinia (Mediterranean Basin)

Threatened Sardinian vascular flora: A synthesis of 10 years of monitoring activities

The plant endemism in the Maritime and Ligurian Alps

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