کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5517560 1543277 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of three different predatory ciliate species on activated sludge microfauna
ترجمه فارسی عنوان
تاثیر سه گونه مختلف گیاهخوار دارویی بر فرایند لجن فعال
کلمات کلیدی
تنوع زیستی، محیط زیست وب غذایی، پیشگویی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی

Bacterivorous ciliates play important roles in the functioning of activated sludge by reducing dispersed bacteria and enhancing flocculation. There are, however, no data on the resistance of this functional group of microorganisms to predation. Our experiment was conducted with activated sludge subsamples subjected to artificially introduced three predatory ciliates species. The two predator species originating from activated sludge were Oxytricha sp. and Spathidium spathula. Dileptus margaritifer was a “foreign” predator species. The latter was introduced to compare its effect with the influence of predators naturally occurring in activated sludge on the ciliates community potentially adapted to certain predation strategies. Results showed that introduction of predatory ciliates into the activated sludge did not significantly change the total abundance of protozoa but rebuilt bacterivorous ciliate communities. Introduced predators significantly affected the most numerous ciliate species from the genera Epistylis and Cyclidium. In the presence of D. margaritifer, the abundance of sessile, colonial ciliates (Epistylis sp.) was significantly lower compared to the control treatment and to the treatments with the other predators. The activated sludge ciliate community was the most affected by the introduction of the “foreign” predator - D. margaritifer, a large ciliate armed with toxicysts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Protistology - Volume 58, April 2017, Pages 87-93
نویسندگان
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