Eleusine indica was first reported from Budapest in 1928, and it is continuously spreading since then. Main goals of our study were to document the present distribution range of E. indica, and to describe its phytosociological characteristics within the administrative boundary of Budapest, Hungary. Th e survey was carried out in the second half of 2015. Phytosociological samples were taken at 15 localities, scattered across Budapest, using 2 m × 2 m or 1 m × 4 m quadrats, as the shape of the vegetation patches required. It was found that E. indica has spread to all 23 districts of Budapest and colonized the two Danube islands as well. In a significant proportion of cases its stands were formed by over 100 plants. Altogether 106 occurrences were precisely localized by GPS coordinates and additional topographical data, but much more were observed. Typical occurrences were on intensively trampled soil surfaces, curbs, pavement cracks and car parking areas. It is supposed that vehicle traffic plays an important role in spreading of E. indica. Considering phytosociology, E. indica stands were found in habitats also characteristic for common knotgrass communities. Notable differences in habitat preference was not recognized between Indian goosegrass and common knotgrass, in fact in each of the 15 relevés these two species co-occurred. Typical accompanying species of the Eleusine stands can be listed in three groups: (1) late summer grasses with C4 type photosynthetic pathway (Cynodon dactylon, Digitaria sanguinalis, Eragrostis minor, Setaria pumila); (2) dicots adapted to intensive trampling, oft en with leaf rosettes (Polygonum aviculare, Plantago lanceolata, P. major, Taraxacum officinale, Trifolium repens) and (3) late summer, dicotyledonous weeds (Amaranthus retroflexus, Erigeron canadensis, Portulaca oleracea, Tribulus terrestris).
|Translated title of the contribution||Distribution and phytosociological characterisation of the alien Eleusine indica in Budapest, Hungary|
|Number of pages||22|
|Publication status||Published - Jan 1 2017|
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Plant Science