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  • Nutrient Excretion of Zooplankton Collected from Naples Reef in the Santa Barbara Channel at the end of the summer season in 2019
  • Le, Katherine; Santa Barbara Coastal LTER
  • 2019-06-06
  • Le, K. 2019. Nutrient Excretion of Zooplankton Collected from Naples Reef in the Santa Barbara Channel at the end of the summer season in 2019 ver 1. Environmental Data Initiative. https://doi.org/DOI_PLACE_HOLDER (Accessed 2024-12-27).

  • Giant kelp,

    Macrocystis pyrifera

    , requires a constant supply of nutrients to maintain rapid growth throughout the year. However, during the summer season, the two major sources of nutrients—terrestrial runoff and upwelling—are absent. We propose that nutrient regeneration by zooplankton plays an important role in providing the necessary nutrients for giant kelp. In this study, we present results from two excretion trials that were conducted in late summer. Our results reveal that the abundance of zooplankton is 1,814 ± 357 individuals per cubic meter in the top meter of the kelp forest canopy. In addition, we found that zooplankton do not excrete significant amounts of nitrite, nitrate, or urea. According to our data, zooplankton excrete 0.007 µmol L

    -1

    hr

    individual

    of ammonium to the kelp canopy, which is available for direct uptake by giant kelp blades. The total contribution of ammonium by zooplankton is 12.7 µM hr

    m

    3

    within the kelp canopy. We determined that zooplankton communities may be an important source of dissolved nutrients for giant kelp during low-nutrient periods because of the high abundance of zooplankton in kelp forests, the close proximity of zooplankton aggregations to kelp blades in the canopy, and the ability of zooplankton to excrete a significant amount of ammonium.

  • N: 55.895      S: 55.895      E: 112.094      W: 112.094
  • edi.297.1  (Uploaded 2019-06-06)  
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  • DOI PLACE HOLDER
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Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

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