Deakin University
Browse

File(s) under permanent embargo

Stable isotopes infer the value of Australia’s coastal vegetated ecosystems from fisheries

Version 2 2024-06-04, 04:43
Version 1 2019-11-20, 15:22
journal contribution
posted on 2024-06-04, 04:43 authored by H Janes, Peter Macreadie, Emily NicholsonEmily Nicholson, Daniel IerodiaconouDaniel Ierodiaconou, S Reeves, MD Taylor, Paul Carnell
Wild capture fisheries provide substantial input to the global economy through employment and revenue. The coastal zone is especially productive, accounting for just 7% of the total area of the ocean, but supporting an estimated 50% of the world's fisheries. Vegetated coastal ecosystems—seagrass meadows, tidal marshes and mangrove forests—are widely cited as providing nutritional input that underpin coastal fisheries production; however, quantitative evidence of this relationship is scarce. Using Australia as a case study, we synthesized fisheries stable isotope data to estimate nutritional input derived from coastal vegetated ecosystems and combined these “proportional contribution” estimates with total annual catch data from commercial fisheries to determine species-specific dollar values for coastal vegetated ecosystems. Based on the data from 96 commercially important fish species across Australian states (total landings 14 × 106 tonnes pa), we provide a conservative estimate that Australia's coastal vegetated ecosystems contribute at least 78 million AUD per year to the fisheries economy. Two thirds of this contribution came from tidal marshes and seagrasses that were both equally valued at 31.5 million AUD per year (39.4%) followed by mangroves at 14.9 million AUD per year (18.6%). The highest dollar values of coastal ecosystems originated from eastern king prawn (Melicertus plebejus) and giant mud crab (Scylla serrata). This study demonstrates the substantial economic value supported by Australia's coastal vegetated ecosystems through commercial fisheries harvest. These estimates create further impetus to conserve and restore coastal wetlands and maintain their support of coastal fisheries into the future.

History

Journal

Fish and fisheries

Volume

21

Pagination

80-90

Location

Chichester, Eng.

ISSN

1467-2960

eISSN

1467-2979

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Issue

1

Publisher

Wiley

Usage metrics

    Research Publications

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC