Responses of cyanobacteria to herbivorous zooplankton across predator regimes: who mows the bloom?

2015 ◽  
Vol 60 (5) ◽  
pp. 960-972 ◽  
Author(s):  
Pablo Urrutia-Cordero ◽  
Mattias K. Ekvall ◽  
Lars-Anders Hansson
Keyword(s):  
Herbivorous Zooplankton

Algal Competition for Phosphorus: The Influence of Zooplankton and Fish

1986 ◽  
Vol 43 (6) ◽  
pp. 1135-1141 ◽  
Author(s):  
Helge Reinertsen ◽  
Arne Jensen ◽  
Arnfinn Langeland ◽  
Yngvar Olsen
Keyword(s):  
Interspecific Competition ◽  
Green Alga ◽  
Inorganic Carbon ◽  
Blue Green Alga ◽  
Physical Conditions ◽  
Herbivorous Zooplankton ◽  
Enclosure Experiments ◽  
Algal Competition

Interspecific competition for phosphorus between the blue-green alga Anabaena flos-aquae and the green alga Staurastrum luetkemuelleri was studied in enclosure experiments. Both algal populations increased in number upon introduction of fish, but addition of herbivorous zooplankton led to an increase solely in the Staurastrum population. This could not be attributed to grazing by zooplankton, chemical or physical conditions (light, pH, inorganic carbon), or the total supply or rate of supply of phosphorus. The observed differences were apparently due to the patchy release of phosphorus by the fish, and the more homogenous release of this nutrient by the zooplankton. This would allow the Anabaena species, which was capable of rapid uptake of temporary pulses of phosphate, to coexist with Staurastrum in the enclosures with fish.

Recurrence of Kills of Atlantic Herring (Clupea harengus harengus) Caused by Dinoflagellate Toxins Transferred Through Herbivorous Zooplankton

1980 ◽  
Vol 37 (12) ◽  
pp. 2262-2265 ◽  
Author(s):  
Alan W. White
Keyword(s):  
Zooplankton Community ◽  
Clupea Harengus ◽  
Bay Of Fundy ◽  
Atlantic Herring ◽  
Red Tides ◽  
Laboratory Studies ◽  
Toxic Dinoflagellate ◽  
General Phenomenon ◽  
Herbivorous Zooplankton ◽  
Clupea Harengus Harengus

Kills of adult herring occurred in two locations in the southwestern Bay of Fundy in July 1979 during a bloom of the toxic dinoflagellate Gonyaulax excavata. Fish showed the same symptoms as in a herring kill linked to G. excavata toxins in 1976. Herring stomachs contained G. excavata toxins (66–245 μg/100 g guts), the cladoceran Evadne nordmanni, and yellow-brown material probably of algal origin. At the time of the kills the zooplankton community was overwhelmingly dominated by E. nordmanni. Furthermore, bioassays showed the presence of G. excavata toxins in the zooplankters (18 μg/g wet plankton). Combined with evidence from the 1976 kill in which pteropods were vectors of the toxins, and with results from recent field and laboratory studies, these new observations and results substantiate that (1) G. excavata toxins can, and do, cause herring kills in nature with planktonic herbivores, E. nordmanni in this case, acting as vectors, and (2) the toxin transfer mechanism is a general phenomenon among herbivorous zooplankton. Similar food chain events may affect finfish in other areas of the world which experience blooms of toxic dinoflagellates.Key words: dinoflagellate toxins, Gonyaulax excavata, herring kills, Clupea harengus harengus, cladoceran, Evadne nordmanni, red tides, zooplankton, fish kills

scholarly journals Structured Population Models of Herbivorous Zooplankton

1996 ◽  
Vol 66 (4) ◽  
pp. 479-501 ◽  
Author(s):  
Edward McCauley ◽  
Roger M. Nisbet ◽  
Andre M. De Roos ◽  
William W. Murdoch ◽  
William S. C. Gurney
Keyword(s):  
Population Models ◽  
Structured Population Models ◽  
Structured Population ◽  
Herbivorous Zooplankton
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