Biological Invasions

, 11:2209

Disjunct distribution of the Mediterranean freshwater crab Potamon fluviatile—natural expansion or human introduction?

  • Ruth Jesse
  • Markus Pfenninger
  • Sara Fratini
  • Massimiliano Scalici
  • Bruno Streit
  • Christoph D. Schubart
Original Paper

Abstract

Human mediated biological invasions are seen as an increasing danger for biodiversity. On the other hand, range expansions are natural processes. It is often practically not possible to tell these processes apart, like in the case of the freshwater crab Potamon fluviatile. This species has a disjunct distribution on the Balkan Peninsula, Italy, Sicily and Malta. An innovative analysis framework involving phylogeographic model selection and temporal coalescent analyses on a mitochondrial dataset (COI and NADH1) could clarify that the origin of the species was on the Balkans and the colonisation of Italy proceeded from the northern Balkans via southern Italy in the Otranto Strait region. The population expansion associated with this invasion was estimated to have taken place 15,000 years before present (95% c.f. 10,000–24,000 years BP). An anthropogenic introduction is therefore implausible and a natural expansion likely. We argue that the species should thus be included in the national conservation management in Italy.

Keywords

Phylogeography Model selection Adriatic Sea Coalescent demographic analyses LGM sea level Conservation 

Abbreviations

AIC

Akaike Information Criterion

AMOVA

Analysis of Molecular Variance

B.C.

Before Christ

BP

Before Present

COI

Cytochrome Oxidase subunit I

IUCN

International Union for Conservation of Nature

NADH1

Nicotine Amid dehydrogenase subunit 1

LGM

Last Glacial Maximum

MCMC

Monte Carlo Markov Chain

GTR + I + Γ

General Time Reversible + Proportion Invariant + Gamma

PI

Parsimony Informative

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Ruth Jesse
    • 1
    • 2
  • Markus Pfenninger
    • 1
    • 3
  • Sara Fratini
    • 4
  • Massimiliano Scalici
    • 5
  • Bruno Streit
    • 1
  • Christoph D. Schubart
    • 2
  1. 1.Institute of Ecology, Evolution and DiversityGoethe UniversityFrankfurtGermany
  2. 2.Biology 1University of RegensburgRegensburgGermany
  3. 3.Biodiversity and Climate Research CentreFrankfurtGermany
  4. 4.Dpto. di Biologia Animale e Genetica, “Leo Pardi”University of FlorenceFlorenceItaly
  5. 5.Dpto. di BiologiaUniversity “Roma Tre”RomeItaly

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