The Relationship Between Environmental Factors and Cyanobacteria Population in Lake Bloomington and Evergreen Lake in Mclean County, Illinois PDF Download
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Author: Matthew D. Meyers
Publisher:
ISBN: 9781321474589
Category :
Languages : en
Pages : 55
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Book Description
This thesis investigates cyanobacteria on two lakes in McLean County, Illinois from the months of August to October. Data was collected every other week.
Author: Matthew D. Meyers
Publisher:
ISBN: 9781321474589
Category :
Languages : en
Pages : 55
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Book Description
This thesis investigates cyanobacteria on two lakes in McLean County, Illinois from the months of August to October. Data was collected every other week.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Cyanobacteria and environmental factors were studied in Lake George, New York from May 1998 to August 1998. Lake George, New York is a (meso) oligotrophic freshwater lake located in the southeast corner of the Adirondack State Park. An island filled channel known as The Narrows separates it into two distinct basins. The water in the lake flows from south to north where it empties into Lake Champlain near Ticonderoga, New York. The lake is dimictic, mixing in the spring and the fall, and stratification of the water column into a distinct epilimnion and hypolimnion occurs each summer. The lake undergoes a clear water phase in late May/early June. The goal of the study was to determine the temporal and spatial development of the cyanobacteria population in the north and south basins of the lake and their association to physical and chemical factors in the water column. Various nitrogen and phosphorus species were measured along with physical factors such as temperature, pH, dissolved oxygen, specific conductance, and illumination. These factors were then used to search for trends and associations with cyanobacteria enumerated by epifluorescent microscopy. One morphological genus, Synechococcus, was found to dominate the cyanobacteria population throughout the water column and throughout the period of the study. Abundance of Synechococcus increased after the clear water phase ended, reaching its maximum in both basins in early August. Other general trends showed the greatest initial abundance of Synechococcus at 20 and 25 meters in depth in the late spring and this moved up in the water column to an average of 15 meters after the clear water phase of the lake ended in mid-June. Slight temporal and spatial differences were found between the two sites, however linear regression found no strong associations between Synechococcus and any single chemical or physical factor.
Author: Raman K. Raman
Publisher:
ISBN:
Category : Lake restoration
Languages : en
Pages : 36
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Author:
Publisher:
ISBN:
Category : Eutrophication
Languages : en
Pages : 42
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Author: Tammy Anne Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 175
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Book Description
Occurrences of cyanobacterial blooms are in freshwater systems are increasing in frequency and intensity largely in response to urbanization of landscapes, eutrophication, and climate change. Cyanobacterial blooms negatively affect water quality which leads to a broad range of environmental, social, and economic concerns. In particular, cyanobacteria are known to produce a suite of toxins that have been linked to changes to the aquatic food web, small animal mortality and illness, and adverse health risks to humans. Vancouver Lake, located in southwest Washington state, is a tidally influenced shallow freshwater lake that exhibits annual summer cyanobacterial blooms that have been an on-going concern for public health and natural resource managers. Thus, the purpose of this project was to investigate the biotic and abiotic interactions associated with bloom events in a shallow, freshwater system. The main objectives were: 1) analyze phytoplankton community dynamics with an emphasis on the cyanobacterial community in relation to water quality factors; 2) identify and quantify toxin producing cyanobacterial populations in relation to water quality factors; 3) assess the potential effects of cyanobacterial blooms on zooplankton community dynamics; and 4) develop a model on the potential effects of wind-driven waves on internal phosphorus loading as a potential mechanism contributing to seasonal cyanobacterial blooms. Our findings suggest that nutrients, dissolved inorganic nitrogen and dissolved inorganic phosphorus, significantly influence cyanobacterial blooms dynamics, and more specifically with toxin producing cyanobacteria. In relation to zooplankton community dynamics, we found that while cyanobacterial blooms may have some influence, but also non-native invasive crustacean zooplankton may interact with cyanobacterial blooms affecting the summer zooplankton community. In spite of Vancouver Lake being a model large shallow lake highly susceptible to wind driven sediment resuspension, simulations of seasonal orthophosphate availability did not support observed measurements, suggesting other mechanisms such as redox related processes and bioturbation, should be examined in assessing potential management considerations for restoring Vancouver Lake.
Author: Elisabeth (Savi) Vardaka
Publisher: MDPI
ISBN: 3039435051
Category : Science
Languages : en
Pages : 202
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Book Description
Cyanobacterial blooms are a water quality problem that is widely acknowledged to have detrimental ecological and economic effects in drinking and recreational water supplies and fisheries. There is increasing evidence that cyanobacterial blooms have increased globally and are likely to expand in water resources as a result of climate change. Of most concern are cyanotoxins, along with the mechanisms that induce their release and determine their fate in the aquatic environment. These secondary metabolites pose a potential hazard to human health and agricultural and aquaculture products that are intended for animal and human consumption; therefore, strict and reliable control of cyanotoxins is crucial for assessing risk. In this direction, a deeper understanding of the mechanisms that determine cyanobacterial bloom structure and toxin production has become the target of management practices. This Special Issue, entitled “Advancing Knowledge on Cyanobacterial Blooms in Freshwaters”, aims to bring together recent multi- and interdisciplinary research, from the field to the laboratory and back again, driven by working hypotheses based on any aspect of mitigating cyanobacterial blooms, from ecological theory to applied research.
Author: Angeline R. Tillmanns
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages : 316
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Author: Donna S. Francy
Publisher:
ISBN:
Category : Recreation areas
Languages : en
Pages : 0
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Author: Jef Huisman
Publisher: Springer Science & Business Media
ISBN: 1402030223
Category : Science
Languages : en
Pages : 249
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Book Description
This outstanding volume provides an up-to-date overview of the advances in our knowledge of harmful cyanobacteria. An essential reference for all scientists and environmental professionals interested in cyanobacterial ecology and water management.
Author: Timothy Barrett Parkin
Publisher:
ISBN:
Category : Photosynthetic bacteria
Languages : en
Pages : 386
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Book Description
