Thysanoptera in a green roof microecosystem in Bucharest, Romania

In 2010 on the green roof of the Institute of Biology in Bucharest at a height of 15 meters above ground level 607 Thysanoptera specimens were collected. Altogether 15 species were found to occur mostly in the flowers of a variety of plants in the herbaceous layer, but also some were shaken from small shrubs and trees (Rosa canina and Populus sp.). The temporal dynamics of the thrips populations in this spontaneous vegetation show a peak in the beginning of June, with a slightly descending curve to autumn. Haplothrips leucanthemi, with a consistently high numerical abundance throughout the study, is considered to be a sensitive bio-indicator of the colonisation and naturalisation of this semi-isolated urban biotope