Coral Reefs

, Volume 34, Issue 1, pp 19–23

Hot moments in spawning aggregations: implications for ecosystem-scale nutrient cycling

  • Stephanie K. Archer
  • Jacob E. Allgeier
  • Brice X. Semmens
  • Scott A. Heppell
  • Christy V. Pattengill-Semmens
  • Amy D. Rosemond
  • Phillippe G. Bush
  • Croy M. McCoy
  • Bradley C. Johnson
  • Craig A. Layman
Note

DOI: 10.1007/s00338-014-1208-4

Cite this article as:
Archer, S.K., Allgeier, J.E., Semmens, B.X. et al. Coral Reefs (2015) 34: 19. doi:10.1007/s00338-014-1208-4

Abstract

Biogeochemical hot moments occur when a temporary increase in availability of one or more limiting reactants results in elevated rates of biogeochemical reactions. Many marine fish form transient spawning aggregations, temporarily increasing their local abundance and thus nutrients supplied via excretion at the aggregation site. In this way, nutrients released by aggregating fish could create a biogeochemical hot moment. Using a combination of empirical and modeling approaches, we estimate nitrogen and phosphorus supplied by aggregating Nassau grouper (Epinephelus striatus). Data suggest aggregating grouper supply up to an order-of-magnitude more nitrogen and phosphorus than daily consumer-derived nutrient supply on coral reefs without aggregating fish. Comparing current and historic aggregation-level excretion estimates shows that overfishing reduced nutrients supplied by aggregating fish by up to 87 %. Our study illustrates a previously unrecognized ecosystem viewpoint regarding fish spawning aggregations and provides an additional perspective on the repercussions of their overexploitation.

Keywords

Spawning aggregationNitrogenPhosphorusNassau grouperEpinephelus striatusBiogeochemical hot moments

Supplementary material

338_2014_1208_MOESM1_ESM.doc (46 kb)
Supplementary material 1 (DOC 45 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Stephanie K. Archer
    • 1
    • 2
  • Jacob E. Allgeier
    • 1
    • 3
  • Brice X. Semmens
    • 4
  • Scott A. Heppell
    • 5
  • Christy V. Pattengill-Semmens
    • 6
  • Amy D. Rosemond
    • 3
  • Phillippe G. Bush
    • 7
  • Croy M. McCoy
    • 7
  • Bradley C. Johnson
    • 7
  • Craig A. Layman
    • 1
    • 2
  1. 1.Department of Applied EcologyNorth Carolina State UniversityRaleighUSA
  2. 2.Marine Sciences Program, Department of Biological SciencesFlorida International UniversityNorth MiamiUSA
  3. 3.Odum School of EcologyUniversity of GeorgiaAthensUSA
  4. 4.Scripps Institution of OceanographyUniversity of CaliforniaLa JollaUSA
  5. 5.Department of Fisheries and WildlifeOregon State UniversityCorvallisUSA
  6. 6.Reef Environmental Education FoundationKey LargoUSA
  7. 7.Department of the EnvironmentCayman Islands GovernmentGrand CaymanCayman Islands