Fotiadis G, Kyriazopoulos A P, Fraggakis I
Aristotle University of Thessaloniki, Department of Forestry and Natural Environment, Laboratory of Forest Botany, Geobotany, PO Box 270, 541 24, Thessaloniki, Greece.
J Environ Biol. 2011 Nov;32(6):801-6.
Ailanthus altissima is an invasive species for the native flora of Greece and it could pose a serious threat to the biodiversity and the functioning of ecosystems. The purpose of this study was to investigate the spreading of Ailanthus altissima in urban and non urban areas of North and Central Greece and also to evaluate the effects of its spreading on species composition and floristic diversity in natural ecosystems. The spreading of Ailanthus altissima in urban areas is very intense, mainly in abandoned places (35.29%). It is commonly found in non urban areas of Greece, especially in hedgerows of arable lands (36%) and adjacent wetlands (17%). It is less common in forests (4%), shrublands (11%) and grasslands (9%). The spread of Ailanthus altissima in urban and natural ecosystems is relatively recent. Although it has been recorded at altitudes of up to 640 m, it usually appears at low altitudes of up to 200 m. Floristic diversity was found to be higher in the stands that it dominated (H' = 1.574, H' = 1.890) in comparison to stands that were dominated by Quercuspubescens (H' = 1.468) or Q. coccifera (H' = 1.716). This may be contributed to the fact that in those stands synanthropic species, which are usually found in regions of intense human activity, were present together with typical forest vegetation species.
臭椿是希腊本土植物群的入侵物种，可能对生物多样性和生态系统功能构成严重威胁。本研究的目的是调查臭椿在希腊北部和中部城市及非城市地区的扩散情况，并评估其扩散对自然生态系统中物种组成和植物多样性的影响。臭椿在城市地区的扩散非常强烈，主要集中在废弃地点（35.29%）。它在希腊的非城市地区也很常见，尤其是在耕地的树篱（36%）和邻近湿地（17%）。在森林（4%）、灌木丛（11%）和草原（9%）中不太常见。臭椿在城市和自然生态系统中的扩散相对较新。虽然它已被记录在高达640米的海拔高度，但通常出现在高达200米的低海拔地区。研究发现，与以柔毛栎（H' = 1.468）或胭脂虫栎（H' = 1.716）为主的林分相比，在其占主导地位的林分中植物多样性更高（H' = 1.574，H' = 1.890）。这可能是因为在这些林分中，通常出现在人类活动频繁地区的伴人植物物种与典型的森林植被物种同时存在。
