Abstract:Pathway analysis represents an effective means of identifying emerging invasive alien species. For plants, a significant number of invasions have been caused by plant species originally voluntary introduced as ornamentals. The pathway analysis for terrestrial ornamental plants imported from East Asia has been undertaken to provide information on the imports and to identify emerging terrestrial invasive alien plants. Data for terrestrial ornamental plants imported from East
“…Novelty can produce premiums for the industry, so there is a constant pressure for breeders to produce new plant cultivars (Drew et al 2010). Plant characteristics desired by the industry include ease of propagation, stress tolerance, large flowers, long blooming season and easy care (van Valkenburg et al 2014). Analysis of the trade history showed that only 12-20% of the new genus-origin trade flows developed in a regular trade flow.…”
The international trade in plants for planting (P4Ps) is a major pathway for the introduction of plant pests. The global trade in P4Ps is both voluminous and highly diverse, but there is little detailed knowledge about its diversity and dynamics. This makes it difficult to assess the risks associated with this trade and to prioritise high-risk commodities (genus-origin combinations) for detailed inspection or regulation. Using the ISEFOR database, this paper describes the diversity and dynamics of P4P imports into the EU, based on genus-level data for lots imported into fourteen Member States that provided this data for different periods between 2005 and 2014, totalling over 30Bn plants and over 7500 commodities. There was great variety, as well as complementarity, in terms of the imported genera, origins and commodities among the countries. Two-thirds of the imported commodities changed every year. Based on the 10-year data from the Netherlands, the greatest importer of live plants in the dataset, we developed a risk categorisation approach for prioritising the highest risk commodities, based on risk associated information concerning the imported genus and the history of trade with respect to the exporting countries, genera and type of plant material traded. Application of this risk categorisation led to the identification of a modest number of commodities that represent elevated risk, to which more inspection resources can be allocated Guest Editors: Andrew Liebhold, Eckehard Brockerhoff and Martin Nuñez / Special issue on Biological Invasions in Forests prepared by a task force of the International Union of Forest Research Organizations (IUFRO).
“…Novelty can produce premiums for the industry, so there is a constant pressure for breeders to produce new plant cultivars (Drew et al 2010). Plant characteristics desired by the industry include ease of propagation, stress tolerance, large flowers, long blooming season and easy care (van Valkenburg et al 2014). Analysis of the trade history showed that only 12-20% of the new genus-origin trade flows developed in a regular trade flow.…”
The international trade in plants for planting (P4Ps) is a major pathway for the introduction of plant pests. The global trade in P4Ps is both voluminous and highly diverse, but there is little detailed knowledge about its diversity and dynamics. This makes it difficult to assess the risks associated with this trade and to prioritise high-risk commodities (genus-origin combinations) for detailed inspection or regulation. Using the ISEFOR database, this paper describes the diversity and dynamics of P4P imports into the EU, based on genus-level data for lots imported into fourteen Member States that provided this data for different periods between 2005 and 2014, totalling over 30Bn plants and over 7500 commodities. There was great variety, as well as complementarity, in terms of the imported genera, origins and commodities among the countries. Two-thirds of the imported commodities changed every year. Based on the 10-year data from the Netherlands, the greatest importer of live plants in the dataset, we developed a risk categorisation approach for prioritising the highest risk commodities, based on risk associated information concerning the imported genus and the history of trade with respect to the exporting countries, genera and type of plant material traded. Application of this risk categorisation led to the identification of a modest number of commodities that represent elevated risk, to which more inspection resources can be allocated Guest Editors: Andrew Liebhold, Eckehard Brockerhoff and Martin Nuñez / Special issue on Biological Invasions in Forests prepared by a task force of the International Union of Forest Research Organizations (IUFRO).
“…The plant has been widely planted and has subsequently become naturalized in many countries. It is currently known from at least 22 countries, including Argentina (Urcelay et al 2019); Australia (Moreschi et al 2019); Brazil (Guix 2007); Canada, Columbia, England, and France (de Villalobos et al 2010); the French Polynesian Islands and Hawaii (GBIF 2019); Italy, Japan, Mexico, New Zealand, Portugal, and Russia (GBIF 2019;Van Valkenburg et al 2014); South Africa (Henderson 2007); Spain and the United States (Cadic 1983; Andreu and Vilà 2011); Germany (Brändle and Brandl 2012); Lesotho (Kobisi et al 2019); and Swaziland (Henderson 2007). However, there is generally sparse knowledge on the distribution and invasive status of P. angustifolia globally.…”
“…Minthogy a fajok propagulumai számára áthatolhatatlan barrierek az urbánus és szuburbán területeken gyakorlatilag nem léteznek, az egymással összeköttetésben lévő magánkertek az egyik legnagyobb, a kutatók számára azonban az egyik legnehezebben hozzáférhető élőhely-rendszert alkotják az emberi településeken (GASTON et al 2005). A lakosság, dísznövény preferenciája, valamint a dísznövény-és termesztő közeg (földlabda, virágföld) kereskedelem miatt, direkt és indirekt módon, jelentékeny mértékben járul hozzá egyes idegenhonos növényfajok elterjesztéséhez és meghonosodásához (DEHNEN-SCHMUTZ et al 2007a,b, KNAPP et al 2010, VAN VALKENBURG et al 2014, CUBINO et al 2015, PERGL et al 2016, ČEPLOVÁ et al 2017, CSIKY et al 2018, WIRTH 2018.…”
47 dunántúli és alföldi település flórájának felmérése kapcsán, 52 magyarországi flóratérképezési kvadrátból, összesen 157 hazánkban adventív növényfaj adatait közöljük. Az itt sorolt ritka, érdekes vagy a legutóbbi hazai neofiton fajokat összegző listán nem szereplő növényeken belül 65 az ország flórájára új taxonnak számít. A listázott fajok egy része ritka, alkalmilag elvaduló (pl. Lagurus ovatus, Salvia coccinea), az ország jelenlegi klimatikus viszonyai között szaporodni nem képes (pl. Cupressus sempervirens, Punica granatum) faj, de akadnak közöttük potenciális özönnövények is (pl. Celtis sinensis, Lonicera japonica). A kitekintésben felhívjuk a figyelmet az urbánus területek idegenhonos növényfajainak megjelenését és terjeszkedését előidéző gyakorlatokra (pl. zöldterület fenntartás), az e tekintetben speciális urbánus élőhelyekre (pl. magán és botanikus kertek), továbbá a jövőben a klímaváltozás hatására egyre gyakrabban fellépő folyamatok jelentőségére (pl. laurifillizáció, termofil taxonok terjeszkedése).
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