We take advantage of a natural gradient of human exploitation and oceanic primary production across five central Pacific coral reefs to examine foraging patterns in common coral reef fishes. Using stomach content and stable isotope (δ15N and δ13C) analyses, we examined consistency across islands in estimated foraging patterns. Surprisingly, species within the piscivore–invertivore group exhibited the clearest pattern of foraging consistency across all five islands despite there being a considerable difference in mean body mass (14 g–1.4 kg) and prey size (0.03–3.8 g). In contrast, the diets and isotopic values of the grazer–detritivores varied considerably and exhibited no consistent patterns across islands. When examining foraging patterns across environmental contexts, we found that δ15N values of species of piscivore–invertivore and planktivore closely tracked gradients in oceanic primary production; again, no comparable patterns existed for the grazer–detritivores. The inter-island consistency in foraging patterns within the species of piscivore–invertivore and planktivore and the lack of consistency among species of grazer–detritivores suggests a linkage to different sources of primary production among reef fish functional groups. Our findings suggest that piscivore–invertivores and planktivores are likely linked to well-mixed and isotopically constrained allochthonous oceanic primary production, while grazer–detritivores are likely linked to sources of benthic primary production and autochthonous recycling. Further, our findings suggest that species of piscivore–invertivore, independent of body size, converge toward consuming low trophic level prey, with a hypothesized result of reducing the number of steps between trophic levels and increasing the trophic efficiency at a community level.
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Adam TC, Kelley M, Ruttenberg BI, Burkepile DE (2015) Resource partitioning along multiple niche axes drives functional diversity in parrotfishes on Caribbean coral reefs. Oecologia 179:1173–1185
Altabet MA (2001) Nitrogen isotopic evidence for micronutrient control of fractional NO utilization in the equatorial Pacific. Limnol Oceanogr 46:368–380
Barott KL et al (2012) Natural history of coral–algae competition across a gradient of human activity in the Line Islands. Mar Ecol Prog Ser 460:1–12
Bearhop S, Adams CE, Waldron S, Fuller RA, Macleod H (2004) Determining trophic niche width: a novel approach using stable isotope analysis. J Anim Ecol 73:1007–1012
Bellwood D, Wainwright P, Fulton C, Hoey A (2006) Functional versatility supports coral reef biodiversity. Proc R Soc B Biol Sci 273:101
Choat J, Robbins W, Clements K (2004) The trophic status of herbivorous fishes on coral reefs. Mar Biol 145:445–454
Clements KD, Raubenheimer D, Choat JH (2009) Nutritional ecology of marine herbivorous fishes: ten years on. Funct Ecol 23:79–92
Crossman DJ, Choat JH, Clements KD (2005) Nutritional ecology of nominally herbivorous fishes on coral reefs. Mar Ecol Prog Ser 296:129–142
Deb D (1997) Trophic uncertainty vs parsimony in food web research. Oikos 788:191–194
DeMartini EE (1996) Sheltering and foraging substrate uses of the arc-eye hawkfish Paracirrhites arcatus (Pisces: Cirrhitidae). Bull Mar Sci 58:826–837
DeMartini EE, Friedlander AM, Sandin SA, Sala E (2008) Differences in fish-assemblage structure between fished and unfished atolls in the northern Line Islands, central Pacific. Mar Ecol-Prog Ser 365:199–215. https://doi.org/10.3354/Meps07501
Dill LM, Heithaus MR, Walters CJ (2003) Behaviorally mediated indirect interactions in marine communities and their conservation implications. Ecology 84:1151–1157
Gove JM et al (2016) Near-island biological hotspots in barren ocean basins. Nat Commun. https://doi.org/10.1038/ncomms10581
Graham NA et al (2017) Human disruption of coral reef trophic structure. Curr Biol 27:231–236
Hairston NG, Hairston NG (1993) Cause-effect relationships in energy flow, trophic structure, and interspecific interactions. Am Nat 142:379–411
Hempson TN, Graham NAJ, MacNeil MA, Williamson DH, Jones GP, Almany GR (2017) Coral reef mesopredators switch prey, shortening food chains, in response to habitat degradation. Ecol Evol 7:2626–2635. https://doi.org/10.1002/ece3.2805
Hyslop EJ (1980) Stomach contents analysis—a review of methods and their application. J Fish Biol 17:411–429
Jennings S, Pinnegar JK, Polunin NVC, Boon TW (2001) Weak cross species relationships between body size and trophic level belie powerful size based trophic structuring in fish communities. J Anim Ecol 70:934–944
Kramer M, Bellwood O, Bellwood D (2013) The trophic importance of algal turfs for coral reef fishes: the crustacean link. Coral Reefs 32:575–583
Layman CA, Quattrochi JP, Peyer CM, Allgeier JE, Suding K (2007) Niche width collapse in a resilient top predator following ecosystem fragmentation. Ecol Lett 10:937–944
Lukoschek V, McCormick MI (2001) Ontogeny of diet changes in a tropical benthic carnivorous fish, Parupeneus barberinus (Mullidae): relationship between foraging behaviour, habitat use, jaw size, and prey selection. Mar Biol 138:1099–1113
Matich P, Heithaus MR, Layman CA (2011) Contrasting patterns of individual specialization and trophic coupling in two marine apex predators. J Anim Ecol 80:294–305
McCauley DJ, Young HS, Dunbar RB, Estes JA, Semmens BX, Micheli F (2012) Assessing the effects of large mobile predators on ecosystem connectivity. Ecol Appl 22:1711–1717
McCauley DJ et al (2018) On the prevalence and dynamics of inverted trophic pyramids and otherwise top-heavy communities. Ecol Lett. https://doi.org/10.1111/ele.12900
McMahon KW, Thorrold SR, Houghton LA, Berumen ML (2016) Tracing carbon flow through coral reef food webs using a compound-specific stable isotope approach. Oecologia 180:809–821
Michener RH, Lajtha K (2007) Stable isotopes in ecology and environmental science. Blackwell, Oxford
Mill A, Pinnegar J, Polunin N (2007) Explaining isotope trophic-step fractionation: why herbivorous fish are different. Funct Ecol 21:1137–1145
Motta PJ (1988) Functional morphology of the feeding apparatus of ten species of Pacific butterflyfishes (Perciformes, Chaetodontidae): an ecomorphological approach. Environ Biol Fish 22:39–67. https://doi.org/10.1007/bf00000543
Myers RF (1999) Micronesian reef fishes: a field guide for divers and aquarists. Coral Graphics, Barrigada
Plaisance L, Knowlton N, Paulay G, Meyer C (2009) Reef-associated crustacean fauna: biodiversity estimates using semi-quantitative sampling and DNA barcoding. Coral Reefs 28:977–986
Post DM (2002) Using stable isotopes to estimate trophic position: models, methods, and assumptions. Ecology 83:703–718
Randall JE (2005) Reef and shore fishes of the South Pacific; New Caledonia to Tahiti and the Pitcairn Islands. Univeristy of Hawaii Press, Honolulu
Romanuk TN, Hayward A, Hutchings JA (2011) Trophic level scales positively with body size in fishes. Glob Ecol Biogeogr 20:231–240. https://doi.org/10.1111/j.1466-8238.2010.00579.x
Rooney N, McCann KS (2012) Integrating food web diversity, structure and stability. Trends Ecol Evol 27:40–46
Ruttenberg BI et al (2011) Predator-induced demographic shifts in coral reef fish assemblages. PLoS One 6:e21062
Sandin S, Zgliczynski B (2015) Inverted trophic pyramids. In: Mora C (ed) Ecology of fishes on coral reefs. Cambridge University Press, Cambridge, pp 247–251
Sandin SA et al (2008) Baselines and degradation of coral reefs in the northern Line Islands. PLoS One 3:e1548. https://doi.org/10.1371/journal.pone.0001548
Silveira CB et al (2017) Microbial processes driving coral reef organic carbon flow. FEMS Microbiol Rev 41:575–595
Smith JE et al (2016) Re-evaluating the health of coral reef communities: baselines and evidence for human impacts across the central Pacific. Proc R Soc B 283:20151985
Somera TM et al (2016) Energetic differences between bacterioplankton trophic groups and coral reef resistance. J Proc R Soc B 283:20160467
St John J (1999) Ontogenetic changes in the diet of the coral reef grouper Plectropomus leopardus (Serranidae): patterns in taxa, size and habitat of prey. Mar Ecol Prog Ser 180:233–246
Stella JS, Jones GP, Pratchett MS (2010) Variation in the structure of epifaunal invertebrate assemblages among coral hosts. Coral Reefs 29:957–973. https://doi.org/10.1007/s00338-010-0648-8
Wainwright P, Bellwood D (2002) Ecomorphology of feeding in Coral reef fishes. In: Sale P (ed) Coral reef fishes: dynamics diversity in a complex ecosystem. Academic Press, New York, p 33
Williams GJ, Sandin SA, Zgliczynski B, Fox MD, Gove JM, Rogers JS, Furby KA, Hartman AC, Caldwell ZC, Price NN, Smith JE (2018) Biophysical drivers of coral trophic depth zonation. Mar Biol 165:60
Wood CL, Sandin SA, Zgliczynski B, Guerra AS, Micheli F (2014) Fishing drives declines in fish parasite diversity and has variable effects on parasite abundance. Ecology 95:1929–1946
Wyatt A, Waite A, Humphries S (2012) Stable isotope analysis reveals community-level variation in fish trophodynamics across a fringing coral reef. Coral Reefs 31:1029–1044
Zgliczynski BJ, Sandin SA (2017) Size-structural shifts reveal intensity of exploitation in coral reef fisheries. Ecol Ind 73:411–421
This work was conducted with the support of the Moore Family Foundation and several donors to the Scripps Institution of Oceanography. We thank the Republic of Kiribati, Environment and Conservation Division and the US Fish and Wildlife Service (USFWS) for permission to complete this work. For logistical support we thank the officers and crew of the M/V Hanse Explorer and the staff of the Nature Conservancy at Palmyra Atoll. We thank Zach Caldwell, Joe Laughlin, Kyle Koyanagi, and Stephan Charrette for invaluable assistance in the field and Bruce Deck and Brice Semmens for assistance with stable isotope sample preparation, analysis, and insightful discussions.
Communicated by Deron E. Burkepile.
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Zgliczynski, B.J., Williams, G.J., Hamilton, S.L. et al. Foraging consistency of coral reef fishes across environmental gradients in the central Pacific. Oecologia 191, 433–445 (2019). https://doi.org/10.1007/s00442-019-04496-9
- Stomach contents
- Primary production