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Title of Journal: Biol Invasions

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Abbravation: Biological Invasions

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Springer Netherlands

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DOI

10.1016/0378-4363(84)90011-1

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1573-1464

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Invasion of an indigenous Emphasis Type="Italic"

Authors: Nicholas Hanekom
Publish Date: 2007/06/20
Volume: 10, Issue: 2, Pages: 233-244
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Abstract

The introduced mussel Mytilus galloprovincialis is progressively increasing in abundance along the south coast of South Africa Quantitative 01 m2 samples were collected in the midzone of an indigenous Perna perna mussel bed in the 1980s prior to the arrival M galloprovincialis 12 and in the 2000s during the M galloprovincialis invasion 16 In addition in situ counts of M galloprovincialis were done on eight occasions between 1993 and 2005 and in the low and highzones on four occasions In the midzone M galloprovincialis was absent until 1987 its mean densities were low  15 individuals/01 m2 between 1993 and 1996 but thereafter increased steadily peaking in 2004 at 721 individuals/01 m2 before declining in 2005 331 individuals/01 m2 The greatest densities of M galloprovincialis were recorded at the highzone 1121 individuals/01 m2 and the smallest in the lowzone As M galloprovincialis numbers increased there was an associated but smaller decline in P perna numbers and the overall density of mussels increased significantly P  005 No major change was recorded in the size composition of P perna The density of associated fauna differed significantly P  001 between sampling dates with the lowest and highest values being recorded near the ‘beginning’ 2001 and ‘end’ 2005 of the invasion period respectively These differences were largely due to variations in the density of barnacles and the toothed barnacle Chthamalus dentatus appeared to be the only associated faunal species that was directly affected by the M galloprovincialis invasion experiencing a significantly P ≤ 005 but temporary decline in density and biomass valuesSouth African National Parks SANParks are thanked for financial and logistical support I also gratefully acknowledge contributions of the following persons R M Randall for commenting on the draft manuscript A K Riley for administrative help D Colenbrander E Kivett L Munyai and D Joubert for field and laboratory assistance and R M Fisher for help with the artwork I am greatly indebted to the referees who provided detailed and constructive suggestions for improving of the manuscript

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  2. Improving and integrating data on invasive species collected by citizen scientists
  3. Molecular and morphological insights into the origin of the invasive greater white-toothed shrew ( Crocidura russula ) in Ireland
  4. Feral cat eradication in the presence of endemic San Nicolas Island foxes
  5. First larval record of Pterois volitans (Pisces: Scorpaenidae) collected from the ichthyoplankton in the Atlantic
  6. Evolution of enhanced reproduction in the hybrid-derived invasive, California wild radish ( Raphanus sativus )
  7. Tracking the expansion of the American mink ( Neovison vison) range in NW Portugal
  8. Interactions between invasive and native crustaceans: differential functional responses of intraguild predators towards juvenile hetero-specifics
  9. The invasive Australian redback spider, Latrodectus hasseltii Thorell 1870 (Araneae: Theridiidae): current and potential distributions, and likely impacts
  10. Aggressive interactions between two invasive species: the round goby ( Neogobius melanostomus ) and the spinycheek crayfish ( Orconectes limosus )
  11. Soil type, microsite, and herbivory influence growth and survival of Schinus molle (Peruvian pepper tree) invading semi-arid African savanna
  12. Geographic range and structure of cryptic genetic diversity among Pacific North American populations of the non-native amphipod Grandidierella japonica
  13. Non-linear effects of invasive lionfish density on native coral-reef fish communities
  14. A predatory land snail invades central-western Argentina
  15. Use of niche models in invasive species risk assessments
  16. Invaded range of the blackberry pathogen Phragmidium violaceum in the Pacific Northwest of the USA and the search for its provenance
  17. Invasion of the African sharp-tooth catfish Clarias gariepinus (Burchell, 1822) in South China
  18. Invader population speeds up life history during colonization
  19. The apparent demise of the Asian date mussel Musculista senhousia in Western Australia: or using acts of god as an eradication tool
  20. Alien plant invasions in tropical and sub-tropical savannas: patterns, processes and prospects
  21. Last Chance to Know? Using Literature to Explore the Biogeography and Invasion Biology of the Death Cap Mushroom Amanita phalloides (Vaill. ex Fr. :Fr.) Link
  22. Tidal and seasonal effects on survival rates of the endangered California clapper rail: does invasive Spartina facilitate greater survival in a dynamic environment?
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  25. Non-native grass invasion alters native plant composition in experimental communities
  26. Trading in snails: plant nurseries as transport hubs for non-native species
  27. Ant community structure on a small Pacific island: only one native species living with the invaders
  28. Priority invasive alien plants in the Tuscan Archipelago (Italy): comparing the EPPO prioritization scheme with the Australian WRA
  29. Disturbance-mediated competition: the interacting roles of inundation regime and mechanical and herbicidal control in determining native and invasive plant abundance
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  32. Risk assessment of the crayfish pet trade based on data from the Czech Republic
  33. Distinct invasion sources of common ragweed (Ambrosia artemisiifolia) in Eastern and Western Europe
  34. Evaluating hybridization as a potential facilitator of successful cogongrass ( Imperata cylindrica ) invasion in Florida, USA
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  36. Straddling the divide: invasive aquatic species in Illinois and movement between the Great Lakes and Mississippi basins
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  40. Herbert H. T. Prins and Iain J. Gordon (eds.): Invasion biology and ecological theory. Insights from a continent in transformation
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  48. Eradications as reverse invasions: lessons from Pacific rat ( Rattus exulans ) removals on New Zealand islands
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