Research Data

Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects

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General
Title
Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects
Type
Dataset
Date Record Created
2017-12-19
Date Record Modified
2018-09-28
Language
English
Coverage
Date Coverage
2014-04-15 to 2014-04-28
Time Period
(no information)
Geospatial Location
  • Seychelles inner island group
Description
Descriptions
  1. Type: full

    Dryad dataset consists of morphological, stable isotope, gut content and lipid data for Cephalopholis argus collected in the Seychelles Inner Island group.

    Abstract [Related Publication]: 1. Predator populations are in decline globally. Exploitation, as well as habitat degradation and associated changes in prey availability are key drivers of this process of trophic downgrading. In the short term, longevity and dietary adaptability of large-bodied consumers can mask potential sub-lethal effects of a changing prey base, producing a delayed effect that may be difficult to detect.

    2. In coral reef ecosystems, regime shifts from coral- to algae-dominated states caused by coral bleaching significantly alter the assemblage of small-bodied reef fish associated with a reef. The effects of this changing prey community on reef-associated mesopredators remains poorly understood.

    3. This study found that the total diversity, abundance and biomass of piscivorous mesopredators was lower on regime-shifted reefs than recovering reefs, 16 years after the 1998 mass coral bleaching event.

    4. We used stable isotope analyses to test for habitat-driven changes in the trophic niche occupied by a key piscivorous fishery target species on reefs that had regime-shifted or recovered following climatic disturbance. Using morphometric indices, histology, and lipid analyses, we also investigated whether there were sub-lethal costs for fish on regime-shifted reefs.

    5. Stable isotopes demonstrated that fish from regime-shifted reefs fed further down the food chain, compared to recovering reefs. Lower densities of hepatocyte vacuoles in fish from regime-shifted reefs, and reduced lipid concentrations in spawning females from these reefs, indicated a reduction in energy stores, constituting a sub-lethal and potential delayed effect on populations.

    6. Reduced energy reserves in mesopredators could lead to energy allocation trade-offs, and decreased growth rates, fecundity, and survivorship, resulting in potential population declines in the longer term.

    The full methodology is available in the publication shown in the Related Publications link below.

  2. Type: note

    This data set is available from Dryad in MS Excel (.xlsx) format. Dryad data package: Hempson TN, Graham NAJ, MacNeil AM, Bodin N, Wilson SK (2017) Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects. Dryad Digital Repository. https://doi.org/10.5061/dryad.bq4nn

Related Publications
  1. Hempson, Tessa N., Graham, Nicholas A.J., MacNeil, M. Aaron, Bodin, Nathalie and Wilson, Shaun K. (2018) Regime shifts shorten food chains for mesopredators with potential sublethal effects. 32(3), pp. 820-830.
Related Websites
(no information)
Related Data
(no information)
Related Services
(no information)
Technical metadata
(no information)
People
Creators
  1. Owned by: Ms Tessa Hempson , tessa.hempson@my.jcu.edu.au , ARC Centre of Excellence for Coral Reef Studies
  2. Associated with: Dr Nicholas Graham , nick.graham@jcu.edu.au , ARC Centre of Excellence for Coral Reef Studies, Marine Biology & Aquaculture
  3. Associated with: Dr Aaron MacNeil , ARC Centre of Excellence for Coral Reef Studies, College of Science & Engineering
Primary Contact
Ms Tessa Hempson, tessa.hempson@my.jcu.edu.au
Supervisors
(no information)
Collaborators
  1. Nathalie Bodin, IRD, UMR MARine Biodiversity Exploitation and Conservation (MARBEC), Fishing Port, Victoria, Seychelles
  2. Shaun K. Wilson, Marine Science Program, Department of Biodiversity, Conservation and Attractions, Kensington, Perth, WA, Australia
Subject
Fields of Research
  1. 060205 - Marine and Estuarine Ecology (incl. Marine Ichthyology) (060205)
Socio-Economic Objective
(no information)
Keywords
  1. mesopredator
  2. habitat degradation
  3. coral bleaching
  4. prey availability
  5. food chain
  6. trophic level
  7. Cephalopholis argus
  8. ARC Centre of Excellence for Coral Reef Studies
Research Activity
(no information)
Research Themes
Tropical Ecosystems, Conservation and Climate Change
Rights
License
(no information)
License - Other
CC 0: Public Domain Dedication 1.0 Universal
Access Rights/Conditions
Open access. If the data is not feely accessible via the link provided, please contact the nominated data manager or researchdata@jcu.edu.au for assistance.
Type
open
Rights
(no information)
Data
Data Location
Online Locations
  1. http://dx.doi.org/10.5061/dryad.bq4nn
Stored At
(no information)
Citation
Cite:
Hempson, T.; Graham, N.; MacNeil, A.; Bodin, N.; Wilson, S. (2017). Data from: Regime shifts shorten food chains for mesopredators with potential sublethal effects. James Cook University. (dataset). fb2a6bb29c03f974911bed50b5c7f2dd