Locations of marine animals revealed by carbon isotopes

MacKenzie, Kirsteen M.; Palmer, Martin R.; Moore, A. M.; Ibbotson, A.T.; Beaumont, W. R. C.; Poulter, David; Trueman, Clive N.

doi:10.1038/srep00021

Cited by 99 publications

(109 citation statements)

References 53 publications

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“…MacKenzie and colleagues studied the inverse problem of identifying marine feeding grounds of Atlantic salmon (Salmo salar) from collections of adults returning to spawn in natal rivers after 3 to 5 yr of ocean residency. MacKenzie et al (2011) found that fish returning to different rivers around the U.K. over an 18 yr period had consistently distinct d 13 C values in scale material deposited during ocean residency. Based on a correlation between sea surface temperature and scale d 13 C values, they inferred that fish from the different rivers must have been spatially segregated on marine feeding grounds in the North Atlantic.…”

Section: Applicationsmentioning

confidence: 99%

“…More recently, ecogeochemistry approaches have been used to identify natal origins of ocean-phase anadromous fish (Walther and Thorrold 2010) and to locate marine feeding grounds of anadromous fish caught upon returning to natal rivers to spawn (MacKenzie et al 2011). Walther and coworkers initially identified unique geochemical signatures in otoliths of young-of-the-year American shad (Alosa sapidissima) from a total of 20 rivers along the east coast of the United States (Walther and Thorrold 2008).…”

Section: Applicationsmentioning

confidence: 99%

“…Based on a correlation between sea surface temperature and scale d 13 C values, they inferred that fish from the different rivers must have been spatially segregated on marine feeding grounds in the North Atlantic. Conventional tagging studies had been unable to resolve questions of the location of ocean residency despite a million salmon tagged since the 1950s in English and Welsh rivers (MacKenzie et al 2011). …”

Section: Applicationsmentioning

confidence: 99%

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A review of ecogeochemistry approaches to estimating movements of marine animals

McMahon

Hamady

Thorrold

2013

Limnology & Oceanography

346

313

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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 d 13 C and d 15 N values at the base of the food web, dissolved inorganic carbon d 13 C values, and seawater d 18 O 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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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

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A review of ecogeochemistry approaches to estimating movements of marine animals

McMahon

Hamady

Thorrold

2013

Limnology & Oceanography

346

313

View full text Add to dashboard Cite

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“…Latitudinal differences in d 13 C are due to temperature, surface water CO 2 concentrations, and differences in plankton biosynthesis or metabolism (Rubenstein and Hobson 2004). Recently, MacKenzie et al (2011) showed that differences in marine organism d…”

Section: Isoscape Patternsmentioning

confidence: 99%

Modeling and mapping isotopic patterns in the Northwest Atlantic derived from loggerhead sea turtles

et al. 2014

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Abstract. Stable isotope analysis can be used to infer geospatial linkages of highly migratory species.Identifying foraging grounds of marine organisms from their isotopic signatures is becoming de rigueur as it has been with terrestrial organisms. Sea turtles are being increasingly studied using a combination of satellite telemetry and stable isotope analysis; these studies along with those from other charismatic, highly vagile, and widely distributed species (e.g., tuna, billfish, sharks, dolphins, whales) have the potential to yield large datasets to develop methodologies to decipher migratory pathways in the marine realm. We collected tissue samples (epidermis and red blood cells) for carbon (d 13 C) and nitrogen (d 15 N) stable isotope analysis from 214 individual loggerheads (Caretta caretta) in the Northwest Atlantic Ocean (NWA). We used discriminant function analysis (DFA) to examine how well d 13 C and d 15 N classify loggerhead foraging areas. The DFA model was derived from isotopic signatures of 58 loggerheads equipped with satellite tags to identify foraging locations. We assessed model accuracy with the remaining 156 untracked loggerheads that were captured at their foraging locations. The DFA model correctly identified the foraging ground of 93.0% of individuals with a probability greater than 66.7%. The results of the external validation (1) confirm that assignment models based on tracked loggerheads in the NWA are robust and (2) provide the first independent evidence supporting the use of these models for migratory marine organisms. Additionally, we used these data to generate loggerhead-specific d 13 C and d 15 N isoscapes, the first for a predator in the Atlantic Ocean. We found a latitudinal trend of

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“…13 C values of primary producers (MacKenzie et al 2011). Sea surface temperatures in the MAB during summer-the season when adult loggerheads mainly use MAB waters-range from 15-278C, while water temperatures in the SNWA range from 22.5-288C year round (Wilkinson et al 2009).…”

mentioning

confidence: 99%

Assignment of nesting loggerhead turtles to their foraging areas in the Northwest Atlantic using stable isotopes

et al. 2012

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Abstract. Differential foraging area use can affect population demographics of highly migratory fauna because of differential environmental changes and anthropogenic threats among those areas. Thus, identification of foraging areas is vital for the development of effective management strategies for endangered migratory species. In this study, we assigned 375 loggerhead turtles (Caretta caretta) nesting at six locations along the east coast of the United States to their foraging areas in the Northwest Atlantic (NWA) using carbon and nitrogen stable isotope values (d 15N values characterized three geographic areas-with distinct abiotic and biotic features-used by adult loggerheads in the NWA. Discriminant analysis assigned all 375 female loggerheads to one of the three foraging areas; 91% were assigned with probabilities of !80%. The proportion of nesting turtles using each foraging ground varied geographically; most turtles nesting in northern beaches (72-80%) tend to forage at higher latitudes while most turtles nesting in southern beaches (46-81%) tend to forage at lower latitudes. Stable isotopes can reveal the foraging location of loggerhead turtles in the NWA, which will allow robust analyses of foraging ground effects on demography and improve the design of management strategies for the conservation of loggerhead populations. The conclusions and methods developed in this study are also relevant for other populations of sea turtles and for other highly migratory species.

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Locations of marine animals revealed by carbon isotopes

Cited by 99 publications

References 53 publications

A review of ecogeochemistry approaches to estimating movements of marine animals

A review of ecogeochemistry approaches to estimating movements of marine animals

Modeling and mapping isotopic patterns in the Northwest Atlantic derived from loggerhead sea turtles

Assignment of nesting loggerhead turtles to their foraging areas in the Northwest Atlantic using stable isotopes

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