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Estuaries and Coasts

, Volume 41, Issue 3, pp 784–799 | Cite as

How Well Do Restored Intertidal Oyster Reefs Support Key Biogeochemical Properties in a Coastal Lagoon?

  • Lisa G. ChambersEmail author
  • Stephanie A. Gaspar
  • Christian J. Pilato
  • Havalend E. Steinmuller
  • Kevin J. McCarthy
  • Paul E. Sacks
  • Linda J. Walters
Article

Abstract

The restoration of dead/degraded oyster reefs is increasingly pursued worldwide to reestablish harvestable populations or renew ecosystem services. Evidence suggests that oysters can improve water quality, but less is known about the role of associated benthic sediments in promoting biogeochemical processes, such as nutrient cycling and burial. There is also limited understanding of if, or how long postrestoration, a site functions like a natural reef. This study investigated key biogeochemical properties (e.g., physiochemical properties, nutrient pools, microbial community size and activity) in the sediments of dead reefs; 1-, 4-, and 7-year-old restored reefs; and natural reference reefs of the eastern oyster, Crassostrea virginica, in Mosquito Lagoon (FL, USA). Results indicated that most of the measured biogeochemical properties (dissolved organic carbon (C), NH4 +, total C, total nitrogen (N), and the activity of major extracellular enzymes involved in C, N, and phosphorus (P) cycling) increased significantly by 1-year postrestoration, relative to dead reefs, and then remained fairly constant as the reefs continued to age. Few differences were observed in biogeochemical properties between restored reefs of any age (1 to 7 years) and natural reference reefs. Variability among reefs of the same treatment category was often correlated with differences in the number of live oysters, reef thickness, and/or the availability of C and N in the sediments. Overall, this study demonstrates the role of live intertidal oyster reefs as biogeochemical hot spots for nutrient cycling and burial and the rapidity (within 1 year) with which biogeochemical properties can be reestablished following successful restoration.

Keywords

Crassostrea virginica Shellfish Restoration Biogeochemistry Carbon Nitrogen Phosphorus 

Notes

Acknowledgements

The authors would like to thank Lacie Anderson, Phyllis Klarmann, Meagan Mindalie, Jaice Metherall, John Heiland, and Janet Ho for assistance with field sampling, as well as the cooperation of Canaveral National Seashore and the St. Johns Water Management District in the completion of this study. This work was supported by the Indian River Lagoon National Estuarine Program and the National Science Foundation, under the Coupled Natural-Human Systems program, award #1617374.

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Copyright information

© Coastal and Estuarine Research Federation 2017

Authors and Affiliations

  • Lisa G. Chambers
    • 1
    Email author
  • Stephanie A. Gaspar
    • 1
  • Christian J. Pilato
    • 2
  • Havalend E. Steinmuller
    • 1
  • Kevin J. McCarthy
    • 1
  • Paul E. Sacks
    • 2
    • 3
  • Linda J. Walters
    • 2
  1. 1.Aquatic Biogeochemistry Lab, Department of BiologyUniversity of Central FloridaOrlandoUSA
  2. 2.Coastal and Estuarine Ecology Lab, Department of BiologyUniversity of Central FloridaOrlandoUSA
  3. 3.Winter Springs High SchoolWinter SpringsUSA

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