نتایج جستجو برای: number of blooms

تعداد نتایج: 21178320  

2009
S. Mieruch U. Feudel M. Boersma S. Janisch K. H. Wiltshire

a r t i c l e i n f o Phytoplankton blooms, in their pivotal position in pelagic seasonal succession require precise classification criteria in order to evaluate such parameters as bloom start, bloom timing, bloom maximum and growth rates. Such bloom parameters are linked directly to species and bloom specific features. Currently the phytoplankton bloom concept, though intuitively clear, lacks ...

2010
Prateek Jain Pascal Hitzler Amit P. Sheth Kunal Verma Peter Z. Yeh

The Web of Data currently coming into existence through the Linked Open Data (LOD) effort is a major milestone in realizing the Semantic Web vision. However, the development of applications based on LOD faces difficulties due to the fact that the different LOD datasets are rather loosely connected pieces of information. In particular, links between LOD datasets are almost exclusively on the lev...

Journal: :Water 2022

Green algae play an important role in ecosystems as primary producers, but they can cause algal blooms, which are socio-environmental burdens responding to them requires water resources from dam reservoirs. This study proposes alternative for reducing blooms through operation without using additional resources. A novel oscillation flow concept was suggested: oscillating discharge of irregular f...

2011
Joseph M. Dirnberger

In the late summers of 1993 and 2007, phytoplankton communities in Allatoona Lake shifted from typically diverse assemblages to near monospecific blooms of small cell-size species (a 0.5 X 2 μm cyanobacterium and a 2.5 X 15 μm diatom, respectively). These changes resulted in major increases in the amount of flocculating chemicals used to treat drinking water. Water temperatures in the epilimnio...

2017
Ben A. Wagstaff Iulia C. Vladu J. Elaine Barclay Declan C. Schroeder Gill Malin Robert A. Field

Prymnesium parvum is a toxin-producing haptophyte that causes harmful algal blooms globally, leading to large-scale fish kills that have severe ecological and economic implications. For the model haptophyte, Emiliania huxleyi, it has been shown that large dsDNA viruses play an important role in regulating blooms and therefore biogeochemical cycling, but much less work has been done looking at v...

Journal: : 2021

In recent decades, freshwater ecosystems have regularly experienced blooms of green algae (green tides), causing environmental and economic damage. Blooms alga Spirogyra sp. occur in the ‘Abakanskaya’ anabranch Yenisei River summer months. The is influenced by several anthropogenic factors: construction a dam upper reaches; heated water discharge from thermal power plant; fish farming. aim this...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

تحلیل پوششی داده ها به عنوان یک علم نوپا به ابزاری برای اندازه گیری کارایی در آمده است. تحلیل پوششی داده ها به بررسی و ارزیابی واحدهای تصمیم گیرنده که یک یا چند ورودی را برای تولید یک یا چند خروجی مصرف می کنند می پردازد. از مشخصه های اصلی تحلیل پوششی داده ها حساس بودن آن نسبت به داده ها می باشد بدین معنی که عدم دقت در جمع آوری داده ها باعث به دست آمدن نتایج نادرستی می گردد. از جمله کاربردهای ان...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1389

armenias geopolitics and its historical experience have had a determining impact on the character of its foreign policy .present-day armenia is a small, landlocked country with _11,620 square miles area armenias landlocked nature makes it dependent on the benevolence of its neighbors for access to the outside world a fact that gives it a sense of isolation and vulnerability. as it was indic...

2016
Janet Pelley

The trouble began for Toledo, Ohio, in the spring of 2014, when extreme storms washed an unusually high pulse of nutrients into Lake Erie. By late summer, a massive bloom of blue-green algae, otherwise known as cyanobacteria, had shut down the city’s drinking water system. Powered by nutrients from agricultural runoff and the warm, calm summer waters, the algae spread across the lake and slowly...

2015
A. S. A. Ferreira A. W. Visser

Synoptic scale analysis of mechanisms driving surface chlorophyll dynamics in the North Atlantic A. S. A. Ferreira, H. Hátún, F. Counillon, M. R. Payne, and A. W. Visser Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Denmark Faroe Marine Research Institute, Nóatún 1, P.O. Box 3051, FO 110 Tórshavn, Faroe Islands Nansen Environmental and Remote S...

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