The first report of Occurrence of Diatom Didymosphenia geminata from Iran(A case study from Central Alburz Mountains range,Northern Iran)
Publish place: 26th Symposium of Geosciences
Publish Year: 1386
نوع سند: مقاله کنفرانسی
زبان: English
View: 2,332
This Paper With 19 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
GSI26_045
تاریخ نمایه سازی: 16 آبان 1386
Abstract:
On the course of environmental geology of the lakes and their distributors and their relation to changing of climate during Quaternary- Holocene, diatom species Didymosphenia geminata which from ecological point of view is considered as a nuisance diatom, for the first time is reported from high elevation of abut 2800 m(f.m.s.l) of Central Alburz Mountains range of Northern Iran. Didymosphenia geminata now has a broad distribution around the world, a condition that appears to have developed in the recent decades. This diatom was known to produce larg masses since the earliest historical records, but now the blooms are over a greater area in the Northern Hemisphere and spreading across rivers in the Southem Hemisphere While D. geminata was formerly considered to have narrow ecological tolerances, it is now present in streams exhibiting a wide range of chemical characteristics. It is capable of growing throughout most of the year in streams with low to high NO3 concentrations (<1mg/l->8 mg/l), low to high temperatures (4-27C), and within a broad range of light exposure. The experiences of European and American countries involved in control and minimizing of spreading of this species, suggest us to be very restrict in gathering more and precise information about D.geminata in affected rivers in state and national leve and possible necessay actions have to be taken in order to confine this nuisance species to its reported environment and minimize its faster growth and spread.
Keywords:
Authors
Habib Alimohammadian
Palaeomagnetic Magnetism Laboratory, Geological Survey of iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :