Our study presents Plantago coronopus, a new species of the Hungarian alien fl ora. We describe its taxonomical and morphological peculiarities, ecological and coenological background of its introduction and naturalisation, and its current distribution in the country. Th is Eurasian coastal species has greatly accelerated in the early 1990s and today it has reached several countries of Central Europe. In Hungary it was fi rstly observed in 2013 on numerous sites along the M1 motorway around Győr. One site was reported in Zala County and in the following years in other counties of western Hungary. Recently, it has reached the eastern and northeastern parts of the country also. Its remarkable spread is due to the rapid development of motorway network where specifi c environmental conditions (e.g. road salting) promote its naturalisation.
Inland saline habitats of the Pannonian Lowland are highly threatened by drainage and lack of regular management, especially on their northern distribution limit. We studied the impact of abandonment on the dynamics and survival of saline vegetation through a 4-year field experiment on permanent plots in SW Slovakia (the northern part of the Pannonian Lowland). The examined grassland, alliance of
Between 2011 and 2016 we surveyed 42 sites of coastal salt marshes of Croatia. We confirmed the occurrence of several rare and endangered plant species. Ten of them are included in the Red List of Croatia; critically endangered (CR) Eleocharis uniglumis, Triglochin barrelieri and T. maritima, endangered (EN) Carex divisa and C. extensa, vulnerable (VU) Parapholis incurva, Salsola soda and Suaeda maritima and category data deficient (DD) Limonium virgatum and Puccinellia festuciformis. We also report localities of other rare taxa of salt marshes like Allium telmatum, Tripolium pannonicum subsp. tripolium, Juncus gerardii, Parapholis filiformis, Plantago cornuti, Samolus valerandi and Scorzonera parviflora. Several plant species are endangered. Their habitats, salt marshes were converted into fields or destructed by construction for developing tourist infrastructure. Today only a part of the remained areas are under protection.
Historical and current occurrences of the obligate halophyte Plantago tenuifl ora were studied in Slovakia during [2001][2002][2003][2004][2005][2006][2007][2008][2009][2010][2011][2012][2013][2014][2015]. Th e species occurs in the Podunajská nížina and Východo-slovenská nížina lowlands; 34 localities were documented including historical and current sites as well. Although the species was confi rmed in both above-mentioned lowland areas, the number of localities decreased markedly and we recorded only 13 localities recently. Th e species was observed most frequently in the associations Artemisio santonici-Festucetum pseudovinae and Camphorosmetum annuae. As our data showed, Plantago tenuifl ora belongs to the endangered plant species of the Slovak fl ora, since more than 60% of known localities were not confi rmed recently. Due to the re-introduction of grazing in some locations, its populations are expected to grow.
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