Reserve effects and natural variation in coral reef communities

Alastair R. Harborne, Peter J. Mumby, Carrie V. Kappel, Craig P. Dahlgren, Fiorenza Micheli, Katherine E. Holmes, James N. Sanchirico, Kenneth Broad, Ian A. Elliott, Daniel R. Brumbaugh

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

1. No-take reserves are a common tool for fisheries management and biodiversity conservation in marine ecosystems. Despite much discussion of their benefits, data documenting many reserve effects are surprisingly scarce. Several studies have also been criticized for a lack of rigour so that changes within reserves cannot be separated from underlying natural variation and attributed unequivocally to protection. 2. We sampled both benthic (video quadrats) and associated fish communities (underwater visual censuses) in a well-enforced reserve in The Bahamas. Sampling was explicitly stratified by habitat ('Montastraea reef' and 'gorgonian plain'). To distinguish reserve effects from natural variation, we compared changes inside and outside the reserve with those seen at equivalent spatial scales in other reef systems in the Bahamian archipelago that lack reserves. Reserve-level differences in benthic or fish communities not documented in other reef systems are categorized as 'robust' effects. 3. Robust reserve effects were limited to Montastraea reefs. The reserve supported an average of ≈ 15% more fish species per site compared to outside the reserve. This pattern was particularly driven by more large-bodied grouper, damselfish, and butterflyfish species inside the reserve. Increases in fish biomass and differences in community structure inside the reserve were limited to large-bodied groupers. Increased grazing pressure by parrotfishes in the reserve has lowered macroalgal cover, and caused previously undocumented changes in benthic community structure compared to sites outside the reserve. 4. Some reserve-level differences in fish communities were categorized as 'misleading' because equivalent differences were seen in other reef systems, and are likely to be caused by natural intra-habitat variation. Separation of robust and misleading results was only possible because of archipelago-scale sampling. 5. Synthesis and applications. The Bahamas represents a relatively lightly fished system within the Caribbean. However, cessation of fishing has still increased the mean number of species, the abundance of the most highly prized fishes and, through trophic cascades, altered benthic community structure. In certain habitats, reserves are clearly important for conserving fisheries and biodiversity. However, reserve effects must be explicitly separated from confounding variables to ensure conservation benefits are accurately identified and reported, and not oversold to managers and local stakeholders.

Original languageEnglish (US)
Pages (from-to)1010-1018
Number of pages9
JournalJournal of Applied Ecology
Volume45
Issue number4
DOIs
StatePublished - Aug 2008

Fingerprint

coral reef
reef
fish
community structure
archipelago
benthos
habitat
biodiversity
trophic cascade
grazing pressure
sampling
fishery management
marine ecosystem
effect
census
fishing
stakeholder
fishery
biomass

Keywords

  • Exuma Cays Land and Sea Park
  • Intra-habitat variation
  • Marine reserves
  • Reef-fish communities
  • Sampling design
  • The Bahamas
  • Trophic cascades

ASJC Scopus subject areas

  • Ecology

Cite this

Harborne, A. R., Mumby, P. J., Kappel, C. V., Dahlgren, C. P., Micheli, F., Holmes, K. E., ... Brumbaugh, D. R. (2008). Reserve effects and natural variation in coral reef communities. Journal of Applied Ecology, 45(4), 1010-1018. https://doi.org/10.1111/j.1365-2664.2008.01490.x

Reserve effects and natural variation in coral reef communities. / Harborne, Alastair R.; Mumby, Peter J.; Kappel, Carrie V.; Dahlgren, Craig P.; Micheli, Fiorenza; Holmes, Katherine E.; Sanchirico, James N.; Broad, Kenneth; Elliott, Ian A.; Brumbaugh, Daniel R.

In: Journal of Applied Ecology, Vol. 45, No. 4, 08.2008, p. 1010-1018.

Research output: Contribution to journalArticle

Harborne, AR, Mumby, PJ, Kappel, CV, Dahlgren, CP, Micheli, F, Holmes, KE, Sanchirico, JN, Broad, K, Elliott, IA & Brumbaugh, DR 2008, 'Reserve effects and natural variation in coral reef communities', Journal of Applied Ecology, vol. 45, no. 4, pp. 1010-1018. https://doi.org/10.1111/j.1365-2664.2008.01490.x
Harborne AR, Mumby PJ, Kappel CV, Dahlgren CP, Micheli F, Holmes KE et al. Reserve effects and natural variation in coral reef communities. Journal of Applied Ecology. 2008 Aug;45(4):1010-1018. https://doi.org/10.1111/j.1365-2664.2008.01490.x
Harborne, Alastair R. ; Mumby, Peter J. ; Kappel, Carrie V. ; Dahlgren, Craig P. ; Micheli, Fiorenza ; Holmes, Katherine E. ; Sanchirico, James N. ; Broad, Kenneth ; Elliott, Ian A. ; Brumbaugh, Daniel R. / Reserve effects and natural variation in coral reef communities. In: Journal of Applied Ecology. 2008 ; Vol. 45, No. 4. pp. 1010-1018.
@article{143b4bdd6eba415bb7f95dc03edc6cb6,
title = "Reserve effects and natural variation in coral reef communities",
abstract = "1. No-take reserves are a common tool for fisheries management and biodiversity conservation in marine ecosystems. Despite much discussion of their benefits, data documenting many reserve effects are surprisingly scarce. Several studies have also been criticized for a lack of rigour so that changes within reserves cannot be separated from underlying natural variation and attributed unequivocally to protection. 2. We sampled both benthic (video quadrats) and associated fish communities (underwater visual censuses) in a well-enforced reserve in The Bahamas. Sampling was explicitly stratified by habitat ('Montastraea reef' and 'gorgonian plain'). To distinguish reserve effects from natural variation, we compared changes inside and outside the reserve with those seen at equivalent spatial scales in other reef systems in the Bahamian archipelago that lack reserves. Reserve-level differences in benthic or fish communities not documented in other reef systems are categorized as 'robust' effects. 3. Robust reserve effects were limited to Montastraea reefs. The reserve supported an average of ≈ 15{\%} more fish species per site compared to outside the reserve. This pattern was particularly driven by more large-bodied grouper, damselfish, and butterflyfish species inside the reserve. Increases in fish biomass and differences in community structure inside the reserve were limited to large-bodied groupers. Increased grazing pressure by parrotfishes in the reserve has lowered macroalgal cover, and caused previously undocumented changes in benthic community structure compared to sites outside the reserve. 4. Some reserve-level differences in fish communities were categorized as 'misleading' because equivalent differences were seen in other reef systems, and are likely to be caused by natural intra-habitat variation. Separation of robust and misleading results was only possible because of archipelago-scale sampling. 5. Synthesis and applications. The Bahamas represents a relatively lightly fished system within the Caribbean. However, cessation of fishing has still increased the mean number of species, the abundance of the most highly prized fishes and, through trophic cascades, altered benthic community structure. In certain habitats, reserves are clearly important for conserving fisheries and biodiversity. However, reserve effects must be explicitly separated from confounding variables to ensure conservation benefits are accurately identified and reported, and not oversold to managers and local stakeholders.",
keywords = "Exuma Cays Land and Sea Park, Intra-habitat variation, Marine reserves, Reef-fish communities, Sampling design, The Bahamas, Trophic cascades",
author = "Harborne, {Alastair R.} and Mumby, {Peter J.} and Kappel, {Carrie V.} and Dahlgren, {Craig P.} and Fiorenza Micheli and Holmes, {Katherine E.} and Sanchirico, {James N.} and Kenneth Broad and Elliott, {Ian A.} and Brumbaugh, {Daniel R.}",
year = "2008",
month = "8",
doi = "10.1111/j.1365-2664.2008.01490.x",
language = "English (US)",
volume = "45",
pages = "1010--1018",
journal = "Journal of Applied Ecology",
issn = "0021-8901",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Reserve effects and natural variation in coral reef communities

AU - Harborne, Alastair R.

AU - Mumby, Peter J.

AU - Kappel, Carrie V.

AU - Dahlgren, Craig P.

AU - Micheli, Fiorenza

AU - Holmes, Katherine E.

AU - Sanchirico, James N.

AU - Broad, Kenneth

AU - Elliott, Ian A.

AU - Brumbaugh, Daniel R.

PY - 2008/8

Y1 - 2008/8

N2 - 1. No-take reserves are a common tool for fisheries management and biodiversity conservation in marine ecosystems. Despite much discussion of their benefits, data documenting many reserve effects are surprisingly scarce. Several studies have also been criticized for a lack of rigour so that changes within reserves cannot be separated from underlying natural variation and attributed unequivocally to protection. 2. We sampled both benthic (video quadrats) and associated fish communities (underwater visual censuses) in a well-enforced reserve in The Bahamas. Sampling was explicitly stratified by habitat ('Montastraea reef' and 'gorgonian plain'). To distinguish reserve effects from natural variation, we compared changes inside and outside the reserve with those seen at equivalent spatial scales in other reef systems in the Bahamian archipelago that lack reserves. Reserve-level differences in benthic or fish communities not documented in other reef systems are categorized as 'robust' effects. 3. Robust reserve effects were limited to Montastraea reefs. The reserve supported an average of ≈ 15% more fish species per site compared to outside the reserve. This pattern was particularly driven by more large-bodied grouper, damselfish, and butterflyfish species inside the reserve. Increases in fish biomass and differences in community structure inside the reserve were limited to large-bodied groupers. Increased grazing pressure by parrotfishes in the reserve has lowered macroalgal cover, and caused previously undocumented changes in benthic community structure compared to sites outside the reserve. 4. Some reserve-level differences in fish communities were categorized as 'misleading' because equivalent differences were seen in other reef systems, and are likely to be caused by natural intra-habitat variation. Separation of robust and misleading results was only possible because of archipelago-scale sampling. 5. Synthesis and applications. The Bahamas represents a relatively lightly fished system within the Caribbean. However, cessation of fishing has still increased the mean number of species, the abundance of the most highly prized fishes and, through trophic cascades, altered benthic community structure. In certain habitats, reserves are clearly important for conserving fisheries and biodiversity. However, reserve effects must be explicitly separated from confounding variables to ensure conservation benefits are accurately identified and reported, and not oversold to managers and local stakeholders.

AB - 1. No-take reserves are a common tool for fisheries management and biodiversity conservation in marine ecosystems. Despite much discussion of their benefits, data documenting many reserve effects are surprisingly scarce. Several studies have also been criticized for a lack of rigour so that changes within reserves cannot be separated from underlying natural variation and attributed unequivocally to protection. 2. We sampled both benthic (video quadrats) and associated fish communities (underwater visual censuses) in a well-enforced reserve in The Bahamas. Sampling was explicitly stratified by habitat ('Montastraea reef' and 'gorgonian plain'). To distinguish reserve effects from natural variation, we compared changes inside and outside the reserve with those seen at equivalent spatial scales in other reef systems in the Bahamian archipelago that lack reserves. Reserve-level differences in benthic or fish communities not documented in other reef systems are categorized as 'robust' effects. 3. Robust reserve effects were limited to Montastraea reefs. The reserve supported an average of ≈ 15% more fish species per site compared to outside the reserve. This pattern was particularly driven by more large-bodied grouper, damselfish, and butterflyfish species inside the reserve. Increases in fish biomass and differences in community structure inside the reserve were limited to large-bodied groupers. Increased grazing pressure by parrotfishes in the reserve has lowered macroalgal cover, and caused previously undocumented changes in benthic community structure compared to sites outside the reserve. 4. Some reserve-level differences in fish communities were categorized as 'misleading' because equivalent differences were seen in other reef systems, and are likely to be caused by natural intra-habitat variation. Separation of robust and misleading results was only possible because of archipelago-scale sampling. 5. Synthesis and applications. The Bahamas represents a relatively lightly fished system within the Caribbean. However, cessation of fishing has still increased the mean number of species, the abundance of the most highly prized fishes and, through trophic cascades, altered benthic community structure. In certain habitats, reserves are clearly important for conserving fisheries and biodiversity. However, reserve effects must be explicitly separated from confounding variables to ensure conservation benefits are accurately identified and reported, and not oversold to managers and local stakeholders.

KW - Exuma Cays Land and Sea Park

KW - Intra-habitat variation

KW - Marine reserves

KW - Reef-fish communities

KW - Sampling design

KW - The Bahamas

KW - Trophic cascades

UR - http://www.scopus.com/inward/record.url?scp=46749098959&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46749098959&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2664.2008.01490.x

DO - 10.1111/j.1365-2664.2008.01490.x

M3 - Article

AN - SCOPUS:46749098959

VL - 45

SP - 1010

EP - 1018

JO - Journal of Applied Ecology

JF - Journal of Applied Ecology

SN - 0021-8901

IS - 4

ER -