Journal
LIMNOLOGY AND OCEANOGRAPHY
Volume 58, Issue 2, Pages 697-714Publisher
WILEY
DOI: 10.4319/lo.2013.58.2.0697
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Funding
- National Science Foundation (Division of Ocean Sciences) [0825148]
- King Abdullah University of Science and Technology [USA 00002, KSA 00011]
- National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0825148] Funding Source: National Science Foundation
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Ecogeochemistry-the application of geochemical techniques to fundamental questions in population and community ecology-has been used in animal migration studies in terrestrial environments for several decades; however, the approach has received far less attention in marine systems. This review includes comprehensive meta-analyses of organic zooplankton delta C-13 and delta N-15 values at the base of the food web, dissolved inorganic carbon delta C-13 values, and seawater delta O-18 values to create, for the first time, robust isoscapes for the Atlantic Ocean. These isoscapes present far greater geographic variability in multiple geochemical tracers than was previously thought, thus forming the foundation for reconstructions of habitat use and migration patterns of marine organisms. We review several additional tracers, including trace-element-to-calcium ratios and heavy element stable isotopes, to examine anadromous migrations. We highlight the value of the ecogeochemistry approach by examining case studies on three components of connectivity: dispersal and natal homing, functional connectivity, and migratory connectivity. We also discuss recent advances in compound-specific stable carbon and nitrogen isotope analyses for tracking animal movement. A better understanding of isotopic routing and fractionation factors, particularly of individual compound classes, is necessary to realize the full potential of ecogeochemistry.
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