Abstract

Studies of plant communities showed that the near-basin spaces were weakly dissected in the Late Triassic of Northern Iran; tree and shrub tier communities of the slopes were the most widespread, deforestated areas were few, and the valleys were poorly developed. The stable dominants identified were as follows: Pagiophyllum peregrinum and various Podozamites for the tree stands of uplands and slopes; Desmiophyllum barnardii for the tree and shrub tiers of the slopes; Nilssonia brevis, Otozamites ashtarensis, several Pterophyllum species, Ptilozamites ctenoides, P. nilssonii, Taeniopteris mikailovii, and Zamites persica for the shrub tier; Dictyophyllum nathorstii, Hyrcanopteris leclerei, and Scytophyllum persicum for the herb tier of the slopes; and Equisetites arenaceus, Neocalamites hoerensis, and Neokoretrophyllites carcinoides for the herb tier of the lowlands. Eight ecozones were identified in the Upper Triassic of Northern Iran according to the patterns of evolution of the flora and vegetation; the time intervals for these ecozones are comparable to those of the zones of the general stratigraphic scale.

中文翻译：

---

Alborz（伊朗北部）上三叠世的植物群落和生态地层学

摘要

植物群落研究表明，在伊朗北部三叠纪晚期，近盆地空间被弱解剖。斜坡上的树木和灌木层群落最为广泛，森林砍伐的地区很少，而山谷则发育不良。确定的稳定优势种如下：高地和山坡上的林木的百日草和各种Podozamites；Desmiophyllum barnardii，用于山坡上的树木和灌木层；短毛尼尔森（Nilssonia brevis），耳麦（Otozamites ashtarensis），几种翼龙属（Pterophyllum）种，侧柏（Ptilozamites ctenoides），尼尔森体育（P. nilssonii），米氏Ta（Taeniopteris mikailovii）和Zamites persica用于灌木层；坡地的草本层有Dictyophyllum nathorstii，Hyrcanopteris leclerei和Scytophyllum persicum。以及低地的草本层的藜科植物arenaceus，新松子藻和新钩虫类carcinoides。根据植物区系和植被的演变模式，在伊朗北部的上三叠纪确定了八个生态区。这些生态区的时间间隔可与一般地层规模的时间间隔相比。