Trophic Structure and Energy Flow in a Texas Pond

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Annual energy flow and mean annual biocontent of eighteen compartments were determined for a 0.94 ha north central Texas pond ecosystem. Annual primary production was 7,780 kcal m^-2 yr^-2, and community production-to-respiration ratio was 1.49. One-third of annual primary production accumulated on the substrate as silt and sedimentation. Community production, production-respiration ratio, and biocontents of all compartments except aquatic insects were large in summer, small in winter. Biocontents of four trophic levels in the pond were all of the same order of magnitude, approximately 50 kcal m^-2. Suspended and benthic organic material forprimary consumers and terrestrial insects for tertiary consumers ... continued below

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vi, 98 leaves : ill.

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Childress, William M. August 1978.

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  • Childress, William M.

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Annual energy flow and mean annual biocontent of eighteen compartments were determined for a 0.94 ha north central Texas pond ecosystem. Annual primary production was 7,780 kcal m^-2 yr^-2, and community production-to-respiration ratio was 1.49. One-third of annual primary production accumulated on the substrate as silt and sedimentation. Community production, production-respiration ratio, and biocontents of all compartments except aquatic insects were large in summer, small in winter. Biocontents of four trophic levels in the pond were all of the same order of magnitude, approximately 50 kcal m^-2. Suspended and benthic organic material forprimary consumers and terrestrial insects for tertiary consumers were substantial allochthanous energy imports into the pond system.

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vi, 98 leaves : ill.

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  • August 1978

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  • May 10, 2015, 6:16 a.m.

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Childress, William M. Trophic Structure and Energy Flow in a Texas Pond, thesis, August 1978; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc503847/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .