Phytoplankton nutrient limitation in a polymictic eutrophic lake: community versus species-specific responses

Author(s):  
D. F. Burger ◽  
D. P. Hamilton ◽  
J. A. Hall ◽  
E. F. Ryan
2021 ◽  
pp. 117771
Author(s):  
Thibaut Cossart ◽  
Javier Garcia-Calleja ◽  
Isabelle A.M. Worms ◽  
Emmanuel Tessier ◽  
Killian Kavanagh ◽  
...  

2019 ◽  
Vol 53 (23) ◽  
pp. 13675-13686 ◽  
Author(s):  
Mengzhu Wang ◽  
Xiwen Xu ◽  
Zhen Wu ◽  
Xiaoqian Zhang ◽  
Peizhe Sun ◽  
...  

1997 ◽  
Vol 54 (9) ◽  
pp. 2170-2181 ◽  
Author(s):  
W P Dinsmore ◽  
E E Prepas

Effects of hypolimnetic oxygenation on profundal (15-25 m depth) Chironomus spp. in double-basined Amisk Lake were studied from 1988 to 1991. Responses were species specific. Mean densities and biomasses of C. anthracinus at 25 m increased 55- and 109-fold, respectively, in the treated north basin over the study period. Densities also increased in the reference south basin, but mean larval weights and biomasses were significantly lower than in the treated basin (P < 0.001). Anoxic conditions in the hypolimnion (dissolved oxygen concentrations <1 mg ·L-1), rather than low hypolimnetic temperatures, appeared to limit C. anthracinus distribution in Amisk Lake. Major changes in C. anthracinus abundance were not apparent until 2 years after the treatment commenced. Densities and biomasses of C. cucini were higher in the reference basin than in the treated basin of Amisk Lake. Densities of the C. decorus and C. plumosus groups increased in the treated basin but remained of minor importance. In comparison, densities of the C. cucini and C. plumosus groups at 25 m in the reference south basin of nearby Baptiste Lake declined over the study period. Increased profundal Chironomus spp. abundance in Amisk Lake suggested an increase in potential fish food.


Author(s):  
Linda Sicko-Goad

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.


2005 ◽  
Vol 173 (4S) ◽  
pp. 18-18
Author(s):  
Joseph C. Liao ◽  
Mitra Mastali ◽  
David A. Haake ◽  
Bernard M. Churchill

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