Details:

Journal Title:
PLOS ONE
Personal Author:
Williams, Ivor D. ; White, Darla J. ; Sparks, Russell T. ; Lino, Kevin C. ; Zamzow, Jill P. ; ... More +
Williams, Ivor D. ; White, Darla J. ; Sparks, Russell T. ; Lino, Kevin C. ; Zamzow, Jill P. ; Kelly, Emily L. A. ; Ramey, Hailey L. Less -
NOAA Program & Office:
NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center) ; JIMAR (Joint Institute for Marine and Atmospheric Research)
NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center) ; JIMAR (Joint Institute for Marine and Atmospheric Research) Less -
Description:
In response to concerns about declining coral cover and recurring macroalgal blooms, in 2009 the State of Hawaii established the Kahekili Herbivore Fisheries Management Area (KHFMA). Within the KHFMA, herbivorous fishes and sea urchins are protected, but other fishing is allowed. As part of a multi-agency monitoring effort, we conducted surveys at KHFMA and comparison sites around Maui starting 19 months before closure, and over the six years since implementation of herbivore protection. Mean parrotfish and surgeonfish biomass both increased within the KHFMA (by 139% [95% QR (quantile range): 98-181%] and 28%[95% QR: 3-52%] respectively). Most of those gains were of small-to-medium sized species, whereas large-bodied species have not recovered, likely due to low levels of poaching on what are preferred fishery targets in Hawaii. Nevertheless, coincident with greater biomass of herbivores within the KHFMA, cover of crustose coralline algae (CCA) has increased from similar to 2% before closure to similar to 15% in 2015, and macroalgal cover has remained low throughout the monitoring period. Strong evidence that changes in the KHFMA were a consequence of herbivore management are that (i) there were no changes in biomass of unprotected fish families within the KHFMA; and that (ii) there were no similar changes in parrotfish or CCA at comparison sites around Maui. It is not yet clear how effective herbivore protection might eventually be for the KHFMA's ultimate goal of coral recovery. Coral cover declined over the first few years of surveys-from 39.6%(SE 1.4%) in 2008, to 32.9%(SE 0.8%) in 2012, with almost all of that loss occurring by 2010 (1 year after closure), i.e. before meaningful herbivore recovery had occurred. Coral cover subsequently stabilized and may have slightly increased from 2012 through early 2015. However, a region-wide bleaching event in 2015 had already led to some coral mortality by the time surveys were conducted in late 2015, at which time cover had dropped back to levels recorded in the KHFMA in 2012.
Keywords:
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Algae
Climatic Changes
Communities
Coral Reefs And Islands
Marine Parks And Reserves
Recruitment (Population Biology)
Resilience (Ecology)
Science
Technology
Wildlife Recovery

Source:
PLOS ONE
DOI:
https://doi.org/10.1371/journal.pone.0159100
Pubmed Central ID:
PMC4963024
Document Type:
Journal Article
Place as Subject:
Hawaii
Rights Information:
CC BY
Compliance:
PMC
Main Document Checksum:
[+]
urn:sha256:cd2f9e183ef33869e8729e577ccf705fc772bfab00c23cef34aed39845b8faa1
File Type:

Supporting Files

• Available data set

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