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Cladocerans

Cladocerans. Eurycercus sp., from Lake Mývatn, North Iceland (Photo: Árni Einarsson). Bosmina sp. (photo by Tom Adams.). Introduction. Abundance depends on nutrient availability, temperature, and predation Few predacious most species are herbivores, feeding on phytoplankton

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Cladocerans

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  1. Cladocerans Eurycercus sp., from Lake Mývatn, North Iceland (Photo: Árni Einarsson). Bosmina sp. (photo by Tom Adams.)

  2. Introduction • Abundance depends on nutrient availability, temperature, and predation • Few predacious most species are herbivores, feeding on phytoplankton • In large lakes they are a major food source for fish such as sticklebacks, minnows and young Sockeye salmon • Bosminidae, Daphniidae, Holopediidae, Leptodoridae, contain primarily or entirely planktonic species • Chydoridae, Macrothricidae and Moinidae contain primarily bottom-dwelling species

  3. Cladocerans

  4. Cladocerans

  5. Cladocerans

  6. Comparison by Zones

  7. Comparison by Depths

  8. Discussion • Bosmina are tolerant of a wide range of water chemistry, temperature and lake morphometry; common in Onondaga • Daphnia also tolerant and prefer cooler waters • Distribution of species in these lakes show trends in depth, temperature, and nutrient availability • Wolf Lake had the most variety of species • Deer and Arbutus only contained one species: Daphnia • due to the tolerance of the species to adverse conditions

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