کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4388019 1305074 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microhabitat hydraulics predict algae growth in running systems
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Microhabitat hydraulics predict algae growth in running systems
چکیده انگلیسی

The properties of surface roughness have been considered an important factor in algal growth. The most relevant finding is that rougher surfaces supports higher algal accumulation. However, the stimulatory effects of roughness have not been tested so far. Thus, here we carried out an experiment using an increasing level of roughness in two different flow conditions. Hence, we investigated the roughness stimulatory threshold for algae growth under different flow conditions, in order to assess the effect of hydraulic dynamics. In the slower flow, the stimulatory threshold did not occurred (high algal coverage in all roughness levels), while in the faster one it could be observed (algal coverage varies among roughness levels). The drag force in slower flow flume was lower than in faster flume. The low values of drag force may have reduced the effects of roughness, which was highlighted in the fast flow flume. Therefore, we suggest that hydraulic dynamics can regulate the roughness stimulatory threshold mechanisms and the peak of algal accumulation is directly dependent of these conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecohydrology & Hydrobiology - Volume 15, Issue 1, 25 February 2015, Pages 49–52
نویسندگان
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