Stress response of a freshwater clam along an abiotic gradient : too much oxygen may limit distribution

  title={Stress response of a freshwater clam along an abiotic gradient : too much oxygen may limit distribution},
  author={Joanna Joyner-Matos and Lauren J. Chapman and Craig A. Downs and Tim Hofer and Christiaan Leeuwenburgh and David Julian},
1. Distribution and abundance patterns are influenced by cellular responses to abiotic stressors. 2. The freshwater clam Sphaerium sp. inhabits swamp/stream systems in Uganda, in which dissolved O 2 (DO), pH and water transparency form ecotonal gradients along tributary streams. Along a swamp/stream transect, clam abundance was negatively related to DO, pH and transparency; clams were most abundant in the hypoxic/acidic swamp, less abundant in the ecotone, and absent from stream sites (neutral… CONTINUE READING
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