Dr. Valerio Ketmaier [email protected]
Transcription
Dr. Valerio Ketmaier [email protected]
Zoogeografia Dr. Valerio Ketmaier [email protected] State of the Art: Phylogeography History, conceptual background and purview of phylogeography • The term phylogeography was introduced by Avise and co-workers in 1987 • Phylogeography is a field of study concerned with the principles and processes governing the geographic distribution of genealogical lineages, especially those within and among closely related species • Phylogeography deals with the historical phylogenetic component of the spatial distribution of lineages • It is an integrative approach that combines diverse micro- and macro-evolutionary disciplines Microevolutionary disciplines ethology demography Phylogeography Paleogeography Paleontology Macroevolutionary disciplines Pop genetics Mol genetics Phylogenetics Dispersal Vicariance A a a1 B b1 b2 A b a1 B a2 C B C a,b,c B a C a,b,c c B a2 A b1 B C c Dispersal A a1 a2 b2 c A Area Taxon Vicariance A a1,b, c1 c1 c2 A/C C a1 cc2 a2 A/B b B Geographic distribution of genetic variants Phylogeographic patterns (aus Avise 2000) Comparative phylogeography of Galapagos fauna • • • • • The Galapagos Archipelago occupies a unique position in the history of evolutionary studies. Oceanic islands are biologically simpler than continental regions. The time of their geological formation is known. Each island of the archipelago can be seen as a replicate natural experiment. Relative limited number of lineages. Geographical setting and geological history of the archipelago 13 major islands; 6 smaller islands; 40 islets with official names and many smaller unnamed islets ~ 1000 km from Ecuador • Islands are formed as the Nazca plate moves over an hot spot (or mantle plume) • Oldest islands located the southeast of the Archipelago • Oldest emerged island 3-4 Ma old • Sunken islands 14 Ma old • Hot spot 80-90 Ma old Ecology • Dry climate with marked seasonality. • A warm season (January to May) influenced by warm ocean currents (southward). • A cool season (June to December) influenced by the Humboldt current (from the south to the west). • Higher islands have higher precipitation. • Every 3-6 years changes in the direction of oceanic currents (El Nino) increase the amount of rainfall dramatically. • Vegetation on islands can be separated in six altitudinal zones, where plant composition is a reflection of the humidity level. Biogeography • Three major track patterns connect the Galapagos with continental areas. East Pacific track - Grehan Biol. J. Linn. Soc., 2001, 74: 267-287 Central AmericaCaribbean track Dispersal capability Pacific basin track + Study cases: Land snails (genus Bulimulus) • • About 80 among species and subspecies have been described for the Archipelago. Molecular study based on two genes (COI and ITS1) to infer the spatial and temporal patterns of speciation. • Progression rule supported • Sequence of species formation approximates the pattern of formation of the islands • Older islands with monophyletic and/or less diverse lineages Parent & Crespi, Evolution 2006, 60: 2311-2328 Study cases: Lava lizards (genus Microlophus) • • At least 17 named and unnamed lineages recognized for the Archipelago. Multiple mitochondrial genes sequenced (ND1, ND2, COI, tRNAs) Peru Peru + Ecuador Kizirian et al., Mol. Phylog. Evol. 2004, 32: 761-769. Study cases: land and marine iguanas (genera Conolophus and Amblyrhynchus) • • • Different ecology. Are these two lineages each other’s closest relatives or not? 12s and 16s genes sequenced; all extant Iguanidae included in the study. Rassmann, Mol. Phylog. Evol. 1997, 7: 158-172. Study cases: Darwin’s finches • • • • • Darwin’s finches are one of a few classical examples of adaptive radiations. Species show adaptive variation in beak size and shape and body size. Variation at these traits is more typical of differences among families of bird. Yet the radiation is believed to have occurred in less than three million years. Three groups based on morphology and behavior: ground-finches (Geospiza); tree-finches (Cactospiza, Camarhynchus, Platyspiza) and Warbler-finches (Certhidea, Pinaroloxias). Open questions: • Are Galapagos finches monophyletic? • Is the Cocos finch directly related to the Galapagos finches? • Did Warbler-finch descend from the same ancestor as the rest of the group? • Is the vegetarian finch really a member of the tree finch group? • Is the distinction between ground and tree finches valid? • MtDNA and microsatellite markers Sato et al., PNAS 1999, 96: 5101-5106. Freeland & Boag, The AUK 1999, 116: 577-588.. Petren et al., Proc. R. Soc. Lond. B., 266: 321-329 Study cases: Darwin’s finches Microsatellites MtDNA • Darwin’s finches constitute a monophyletic assemblage. • Cocos finch are within Darwin’s finch assemblage. • Warbler-finches are basal in the group’s phylogeny. • The vegetarian finch is not a member of the tree finch group. • Ground-finches are clearly a monophyletic group. Sato et al., PNAS 1999, 96: 5101-5106. Freeland & Boag, The AUK 1999, 116: 577-588. Petren et al., Proc. R. Soc. Lond. B., 266: 321-329. Study cases: Giant Galapagos tortoises • • The only extant giant tortoises along with those from Seychelles (but only a single population left). 15 described taxa, of which 11 extant in various stages of imperilment. Questions: • Are Galapagos tortoises a monophyletic lineage and where did they come from? • Patterns and levels of diversification among as well as within islands. Systematics of the group. Caccone et al., PNAS 1999, 9: 13223-13228. • Colonization history of the Archipelago Caccone et al., Evolution 2002, 56: 2052-2066. • Restoration of endangered lineages. Conservation genetics. Beheregaray et al., PNAS 2004, 101: 6514-6519. • Multiple markers used. Poulakakis et al., PNAS 2008, 105: 15464-15469. Study cases: Origin of giant Galapagos tortoises 6-12 Ma Caccone et al., PNAS 1999, 9: 13223-13228. Study cases: Patterns and levels of diversification of giant Galapagos tortoises Some of the haplotypes found at PBL, PBR, VD and RU differ from haplotypes from the same location by 27-70 substitutions while they differ by a few substitutions from haplotypes found in geographically distant populations (PBL vs. VA/VD/SCR; PBR vs. ESP; CPA vs PBL). Human induced translocations? Caccone et al., Evolution 2002, 56: 2052-2066. Study cases: Patterns and levels of diversification of giant Galapagos tortoises Pinta (Lonesome George) Isabela North Santiago Isabela North Isabela Central S.Cruz S.Cruz Paz/S.Cruz Isabela South S.Cristobal 0.2-0.3 MA Espanola 1.5-2.0 MA Caccone et al., Evolution 2002, 56: 2052-2066. Study cases: Patterns and levels of diversification of giant Galapagos tortoises Beheregaray et al., PNAS 2004, 101: 6514-6519. Beheregaray et al., Science 2003, 302:75. Considerable less genetic diversity (Mt/ nucDNA) Bootleneck Age: 88.000-118.700 years Vo l c a n i c e x p l o s i o n : 74.000-120.000 years Study cases: Conservation genetics of giant Galapagos tortoises MtDNA Microsatellites Poulakakis et al., PNAS 2008, 105: 15464-15469. • Isabela V.Wolf: 1669 individuals (about 1/5th of the extant population size) screened at 12 microsatellite loci • Their genetic profiles compared to the available database of all extinct and extant Galapogos tortoise species • The genotypes of 84 individuals from V.Wolf result from hybridization events with a pure C.elephantopus as one the parents • 30 of these 84 individuals are less than 15 years old • 26 had a C.elephantopus mtDNA • There is a good chance that some of these purebred C.elephantopus are still alive Garrick et al., Genetics: in press. • The “extinct” species could be resurrected through targeted breeding efforts Outline • The peri-Mediterranean area: roots of its diversity • Four study cases Cyprinids Hewitt 1999 Stenasellus Troglophilus/ Cyprinids Murella Current diversity • Stenasellidae is a group of exclusively freshwater stygobionts • Limited ability to disperse through unsuitable ecological areas • The case of the S. racovitzai / S. virei lineages S.virei S.racovitzai . ‘50 ‘99 ‘99 ‘64 ‘23 ‘95 >80% MP ML NJ ? 9 Myr Tuscany Corsica NW Sardinia Stenasellus racovitzai SE Sardinia 29 Myr Pyrenees Stenasellus virei Stenasellus assorgiai Proasellus coxalis Allozymes (15 loci); mtDNA (COI) Ketmaier et al., 2003 Mol. Ecol. N c Florence Pisa S Siena 2-0.4 Myr Elba Isl. Grosseto Viterbo Pliocene coastline Present coastline Continental areas Fossil islands T.neglectus T.ovuliformis T.brevicauda T.cavicola DED PEJ DEL T7 T.lazaropolensis T38 T3 T39 T.tatyanae E5D T.bicakcii/BAL T9 PIR ADA2B I5N E1D E4E T.lagoi T.marinae T.gajaci T.spinolosus T.adamovici T8 BEO T6 T. andreinii andreinii T. andreinii hydruntinus T.ovuliformis T.cavicola A12 T22 T23 T.escalerai Phylogeny Bayesian Analysis T.lagoi T.spinolosus T.marinae T.adamovici E1D E4E T.lazaropolensis T.andreinii T.neglectus Greek Is. Turkey Balkans S.Italy T.ovuliformis Combined data (COI by cod+ 12S/16S+ 18S/28S) T38 T39 T9 T7 BEO DED T8 T.cavicola T6 T.brevicauda T3 PEJ ADA2B I5N PP ≥95% PP = 100% DEL Balkans PIR T.bicakcii BAL A12 T22 T23 E5D T.gajaci T.tatyanae T.escalerai Dolichopoda Turkey Formation of mid-Aegean Trench Messinian Quaternary Climate Changes Greek Is. S. Italy Balkans Turkey Balkans Turkey 15 12.5 10 Miocene 7.5 5 2.5 Pliocene Chronology 0 Myr Pleistocene Lineages Through Time Best Constant Rate Model (pure birth) AIC= -250.7077 Best Rate Variable Model (DDX) AIC= -249.5808 ∆AICrc= -1.126891 12 9.6 7.2 4.8 2.4 0 P= 0.647 Myr The null hypothesis of constant speciation rate cannot be rejected T.escalerai T.tatyanae T.gajaci 15 E5D T22 T23 A12 BAL T.bicakcii I5N ADA2B T3 PEJ T.brevicauda T6 T.cavicola T8 Myr 0 Turkey PIR DED BEO T7 T38 T39 T9 T.ovuliformis T.neglectus T.andreinii T.lazaropolensis T.adamovici E1D E4E T.lagoi T.spinolosusT.marinae Dispersal within inland Balkans Dispersal from Anatolia the Balkans Balkans DEL Turkey S.Italy 1.00 Balkans Greek Is. Bayesian Analysis of Geographic Distribution: Vicariance vs. Dispersal Vicariance Aegean / Anatolia Dispersal back to Anatolia Dispersal to S. Italy from Balkans 1.00 1.00 Dispersal to Med. Anatolia from Aegean Anatolia 1.00 Dispersal to coastal Balkans from inland Balkans Dispersal to Caucasus from Med. Anatolia Biogeographic history 6 5 4 2 4 2 3 4 1 Ketmaier et al. 2000 Belg J Zool Ketmaier et al. 2004 Subterranean Biology Ketmaier et al. 2013 Subterranean Biology Taylan et al. 2013 ZooKeys Outline • Introduction to the model organisms (Cyprinids) • Current views and hypotheses on the diversification of cyprinids in Southern Europe • Selected study cases: Scardinius (Rudds), Telestes (Minnows), Rutilus (Roaches), and Alburnus (Bleaks) • Evolutionary and biogeographic inferences based on molecular data • Effects of human interferences Division of freshwater fishes according to salinity tolerance • Primary: taxa that originated and spread in freshwaters strictly intolerant of salt water (Dipnoi, Polypteridae, Cyprinidae etc.) • Primary-like: strictly freshwater species of ancient marine origins (Gobiidae) • Secondary: mostly confined to freshwaters but relatively salt-tolerant (Cichlidae, Cyprinodontidae, Poeciliidae etc.) • Peripheral: recent marine derivates and diadromous taxa (Lota, Anguilla, Alosa, Salmo etc.) Cyprinids • The family belongs to the order Cypriniformes • It’s the largest family of primary freshwater fish, with about 220 genera and more than 2400 species • Despite the diversity of the group little is known about their relationships Mayden et al. Mol Phylog Evol 2009 51: 500-514 Rüber et al. BMC Evol Biol 2007 7:38 20 18 16 14 12 10 N Danubian 8 Non Danubian-Shared 6 Endemic 4 2 0 Tunisian (1) Maghrebo- Southern Algerian Iberian (2) (3) Central Iberian (4) EbroSouthern Cantabric France (6) (5) PadanoVenetian (7) Tuscano- Dalmatian Latium (8) (9) Albanian (10) Western Greece (11) AegeoMacedoAnatolian (12) Danubian district 5 4 6 7 8 3 9 ? 2 1 10 12 11 200 Km Classical theory of early penetration and dispersal of freshwater fishes in western Palearctic and in Southern Europe by river captures (Banarescu, 1960). Pre Miocene in situ evolution? England Lower Miocene W Europe Middle Miocene Central Europe Middle Central Asia Miocene Siberia Early Miocene E Asia Quaternary glacial maxima extinctions Quaternary glacial maxima survivals Iberian Pen. 18 species NW Africa S France Italy W Balkans Alternative theory of an early penetration of freshwater fishes in the periMediterranean area by a Messinian “sea” dispersal (Bianco, 1990). Pre Miocene in situ evolution? Central Europe Middle Miocene Para-Tethys Early Miocene E Asia Late Messinian Middle Miocene Middle Miocene W Europe Mediterranean “Lago Mare” phase S France & N Spain NW Africa Iberian Pen. S France Italy W Balkans Tethys Ocean Closure of the Tethys Ocean Middle Miocene geography Paratethys (dilution basin) s Alp Dinarid Balkan Mediterranean (concentration basin) Anatolian • The Mediterranean had a global negative balance (prevalence of evaporative losses on meteoric and river inputs) • The Paratethys had a positive balance (prevalence of meteoric and river inputs on evaporative losses) Presalinity crisis event: closure of the AtlanticMediterranean seaway Paratethys (freshwater basin) Mediterranean (hypersaline basin) The Mediterranean Messinian salinity crisis Paratethys (freshwater basin-”Lago Mare”) Mediterranean (drying up) The Messinian “Lago Mare” phase of the Mediterranean Paratethys ”Lago Mare” residual basins ”Lago Mare” phase of the Mediterranean Late Messinian resettlement of marine conditions of the Mediterranean Mediterranean (oceanic salinity) • Black spots indicate ancient river drainages where Paratethys primary freshwater fishes might have survived Different timing: Quaternary vs. Messinian Effects on phylogeny Gradual hypothesis Lago Mare hypothesis N 14 5 4 6 7 8 3 10 9 11 13 12 2 1 200 Km • Ketmaier et al. Ital J Zool 1998 65: 41-48 • Bianco & Ketmaier J Fish Biol 2001 59: 190-208 • Bianco, Busatto & Ketmaier Quad.ETP 2001 30:115-120 • Bianco & Ketmaier Environ Biol Fish 2003 68: 370 • Ketmaier et al. Zool Scr 2003: 13-22 • Ketmaier et al. Mol Phylog Evol 2004 32: 1061-1071 • Bianco et al. Biol Amb 2004 18: 7-14 • Bianco & Ketmaier Folia Zool 2005 42: 42-49 • Bianco, Zupo & Ketmaier J Fish Biol 2006 68: 150-155 • Ketmaier et al. Mol Phylog Evol 2008 49: 362-367 • Ketmaier et al. J. Fish Biol 2009 75: 997-1017 Scardinius acarnanicus (12) Scardinius graecus (12) Se1 (6) 100 Se14 (13) +17 Se9 (14) Se10 (14) Se2 (7**) Se3 (7**) Scardinius erythrophthalmus 97 Se4 (7**) +10 Se5 (8*) 75 Se6 (8*) +6 Se7 (8*) Se8 (8*) Scardinius scardafa (8**) 100 Se12 (7) +38 Se13 (11) Scardinius erythrophthalmus 84 +4 *allochthnous anthropogenic populations ** autochthonous populations 98 +17 14 4 5 7 6 8 3 10 9 2 1 11 13 12 Se11 (14) 99 +19 98 +19 Ts2 (6) 100 Ts3 (14) +13 Ts1 (5) Telestes souffia Ts4 (10) 96 +12 94 +23 98 +12 100 +16 100 +19 100 +26 Pachychilon pictus (11) Lc2 (13) 96 +19 Tm1 (7) Tm2 (7) Tm3 (7) Telestes Tm4 (8) muticellus Tm5 (8) 94 Tm6 (9) +23 Tm7 (9) Telestes montenigrinus (11) Leuciscus turskyi (10) Leuciscus polylepis (7) Telestes Tp1 (12) Tp2 (12) pleurobipunctatus Telestes beoticus (12) Phoxinellus croaticus (10) Phoxinellus metohiensis (10) Lc1 (6) Leuciscus cephalus Tropidophoxinellus spartiaticus (12) Leuciscus leuciscus (14) Phoxinellus prespensis (12) Cyprinus carpio (-) 0.01 substitutions/site Ketmaier et al. Mol Phylog Evol 2004 32: 1061-1071 14 7 4 5 6 8 3 10 9 2 1 13 11 12 Ketmaier et al. Mol Phylog Evol 2008 49: 362-367 Effects on phylogeny Gradual hypothesis Lago Mare hypothesis Semirara Carabao Boracay Panay North Panay South North Gigante Negros Gallus g. Pica p. BO10 BO1 BO3 BO7 BO4 BO6 PN7 PN2 BO5 BO2 BO9 PN19 PN3 NE1 CA8 CA10 CA6 CA5 NE2 PN11 PN14 CA11 PN1 CA3 CA7 CA9 PN10 PN4 BO8 CA4 PS3 PN18 PN15 PN12 PN9 PS2 PN17 PS1 PN8 PN6 PN5 PN16 PN13 CA1 CA2 NG1 NE3 SE8 SE3 SE1 SE4 SE10 SE9 SE7 SE11 SE5 SE2 SE6 Plasmodium sp. PN1B PN15A PN11C NE3E NE2M CA7M BO1C CA1M BO1E CA5A SE4D SE5D SE2I SE9O SE11A SE7O SE2A SE3O PN1A NE2B NE2J PN15B SE10E CA8Q CA5B CA87 CA6M CA8A NE2L NG1M PN14U PN13M PN18M PN1I SE4F SE6B PN1F NE3A SE10C SE2C SE11K SE6C SE6A SE8O SE5A SE1C SE11T SE10B PS2M CA8P PN6M SE11P PN14Y SE11L PN11G PN14A SE1A SE1I • TreeMap superimposes the parasite tree (fish) on the host (area) tree to obtain reconciled trees • Detect cospeciation, duplication and sorting events (19 cospeciation events, 39 duplications, 311 sorting events in this particular case) Silva-Iturriza et al. J Zool Syst Evol Res 2010 48: 269-278 14 There’s no statistical association between the molecular tree and the district area cladogram (P=0.776) 7 4 5 6 8 3 10 9 2 1 13 11 12 District area cladogram (Banarescu Hypothesis) Telestes Dalmatian (10) Danubian (14) W-Greece (12) Padano-Venetian/ Tuscan-Latium/ Southern Italy (7-8-9) Albanian (11) Albanian (11) Balkans (12/13) Dalmatian (10) Padano-Venetian (7) Ebro-Cantabric (5) Padano-Venetian (7) Southern France (6) Southern France (6) Danube (14) Dalmatian (10) Ebro-Cantabric (5) (N/A) Central Iberian (4) Southern Iberian (3) 14 There’s no statistical association between the molecular tree and the district area cladogram (P=0.596) 7 4 5 6 8 3 10 9 2 1 13 11 12 District area cladogram (Banarescu Hypothesis) Scardinius W-Greece (12) Danubian (14) Danubian (14) Albanian (11) Aegeo-MacedoAnatolian (13) Balkans (12/13) Southern France (6) Padano-Venetian (7) Padano-Venetian (7) Southern France (6) Tuscan-Latium (8) (N/A) Ebro-Cantabric (5) Padano-Venetian (7) Albanian (11) (N/A) Central Iberian (4) Southern Iberian (3) Danubian (14) 14 7 4 5 6 8 3 9 2 Rutilus 1 There’s no statistical association between the molecular tree and the district area cladogram (P=0.879) 10 13 11 12 Padano-Venetian (7) District area cladogram (Banarescu Hypothesis) Albanian (11) Danubian (14) Padano-Venetian (7) W-Greece (12) Danubian (14) Albanian (11) Balkans (12/13) Tuscan-Latium (8) (N/A) Padano-Venetian (7) Danubian (14) Southern France (6) W-Greece (12) Padano-Venetian (7) Southern France (6) Aegeo-MacedoAnatolian (13) Ebro-Cantabric (5) (N/A) Padany-Venetian (7) Central Iberian (4) Southern Iberian (3) Estimates of divergence times Telestes Scardinius (6.3-5.1 Myr) (5.7-4.8 Myr) Rutilus (5.6-4.5 Myr) Messinian (7.2-5.3 Myr) Pliocene (5.3-1.8 Myr) Lago Mare phase (5.3 Myr) Pleistocene (1.8-0.01 Myr) BA BI • Diversification of leuciscine lineages has been determined by intense vicariant events • Vicariance was largely promoted by the paleoevolution of the Mediterranean region • B anarescu and Bianco hypotheses are not mutually exclusive Take home message: Banarescu hypothesis (BA) works at the amonggenera level Bianco hypothesis (BI) targets divergence at the within-genera level Perea et al BMC Evol Biol 2010 10: 265 Padano-Venetian district north of the Apennines. Four cyprinids and two cobitids endemics. Tuscano-Latium district: Central Italy West of the Apennines. Two cyprinids and one goby endemics. Southern Italy district: south of Rivers Vomano and Tiber. Two cyprinids and one cobitid endemics. Arrows indicate the directions of the freshwater fish transfers. • The number of introduced species of European (in grey) and extra European (in white) origin has been increasing steadily in the last five centuries • All localities host species translocated from Northern Italy (in grey) • Eight localities (out of twelve) host species introduced from outside Italy (in black) Bianco & Ketmaier J Fish Biol 2001 59: 190-208 Table 2. Illustrative examples of the interactions between non-native, translocated-native (*) and native freshwater fish species in Italy. Origin of native species: D (Danubian), PV (Padano-Venetian), TL (Tuscano-Latium), AC (Apulo-Campania), ME (Mediterranean), IB (Iberian Peninsula). Geographical areas are the same as in Fig. 1. Updated IUCN category (Bianco et al. 2013): CR (critically endangered), VU (vulnerable), EN (endangered), NT (nearly threatened), LC (low concern). It is worth noting that P. genei and R. rubilio are threatened in their native ranges but pest wherever they have been introduced. Aliens & Translocated Geographic origin Rutilus rutilus Chondrostoma nasus D D Scardinius esperedicus* Rutilus rubilio* Rutilus rubilio* Alburnus arborella* Rutilus aula* Chondrostoma genei* Gambusia hoolbroki Barbus graellsii Barbus barbus Telestes agassizi Barbus balcanicus Gobio gobio Cobitis bilineata* Esox Lucius Silurus glanis Padogobius bonelli* PV TL TL PV PV PV USA IB D D D D PV D D PV Threatened natives Rutilus pigus; Rutilus aula Chondrostoma soetta; Protochondrostoma genei Scardinius scardafa Rutilus aula Alburnus albidus Alburnus albidus Rutilus rubilio Squalius lucumonis Aphanius fasciatus; Gasterosteus gymnurus Barbus tyberinus Barbus plebejus Telestes muticellus Barbus caninus Gobio benacensis Cobitis zanandreai Esox cisalpinus All species Padogobius nigricans Geographic origin/ IUCN category PV/EN; PV/LC PV/EN PV/EN TL/CR PV/LC MER/VU MER/VU TL/NT TL/CR ME/LC ME/LC TL/VU PV/VU PV,TL/LC PV/EN PV/EN AC/CR PV/TL -/TL/VU Type of habitat where natives and aliens species meet Lacustrine Lacustrine or Riverine Lacustrine Riverine Riverine Lacustrine Lacustrine Riverine Wetlands Lacustrine – Riverine Lacustrine – Riverine Riverine (Isonzo River) Riverine (Isonzo River) Riverine Riverine (Volturno River) Lacustrine – Riverine Lacustrine Riverine Ketmaier & Bianco, in prep. Alburnus albidus Alburnus arborella Ketmaier et al. J Fish Biol 2009 75: 997-1017 Ketmaier et al. J Fish Biol 2009 75: 997-1017 Ketmaier et al. J Fish Biol 2009 75: 997-1017 Ketmaier et al. J Fish Biol 2009 75: 997-1017 Ketmaier et al. J Fish Biol 2009 75: 997-1017 Fiorentino et al. 2008b. BJLS Transect: 30 km 21 Areas Fiorentino et al. 2013 MEC Fiorentino et al. 2013.MEC Fiorentino et al. 2013.MEC Fiorentino et al. 2013.MEC • Southern Europe: a tale of tales • Current diversity is based on adding and mixing different layers of complexity • History of Southern European lineages has been of preservation rather than dramatic extinction/recolonization events