Consistent multi-level trophic effects of marine reserve protection across northern New Zealand
Publication Date
May 24, 2017
Authors
Graham J. Edgar, Rick D. Stuart Smith, Russell J. Thomson & Debbie J. Freeman
Volume
12
Issue
5
Pages
e0177216
DOI
https://dx.plos.org/10.1371/journal.pone.0177216
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0177216
Scopus
85019681851
Mendeley
http://www.mendeley.com/research/consistent-multilevel-trophic-effects-marine-reserve-protection-across-northern-new-zealand-2
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Mendeley | Further Information

{"title"=>"Consistent multi-level trophic effects of marine reserve protection across northern New Zealand", "type"=>"journal", "authors"=>[{"first_name"=>"Graham J.", "last_name"=>"Edgar", "scopus_author_id"=>"7005803258"}, {"first_name"=>"Rick D.", "last_name"=>"Stuart-Smith", "scopus_author_id"=>"6507368501"}, {"first_name"=>"Russell J.", "last_name"=>"Thomson", "scopus_author_id"=>"11939466600"}, {"first_name"=>"Debbie J.", "last_name"=>"Freeman", "scopus_author_id"=>"25635522700"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"doi"=>"10.1371/journal.pone.0177216", "sgr"=>"85019681851", "isbn"=>"1111111111", "issn"=>"19326203", "scopus"=>"2-s2.0-85019681851", "pui"=>"616340041"}, "id"=>"cc967cec-4d8c-3c12-b20d-4c839b9e5f3c", "abstract"=>"Through systematic Reef Life Survey censuses of rocky reef fishes, invertebrates and macroalgae at eight marine reserves across northern New Zealand and the Kermadec Islands, we investigated whether a system of no-take marine reserves generates consistent biodiversity outcomes. Ecological responses of reef assemblages to protection from fishing, including potential trophic cascades, were assessed using a control-impact design for the six marine reserves studied with associated reference sites, and also by comparing obser- vations at reserve sites with predictions from random forest models that assume reserve locations are fished. Reserve sites were characterised by higher abundance and biomass of large fishes than fished sites, most notably for snapper Chrysophrys auratus, with forty-fold higher observed biomass inside relative to out. In agreement with conceptual models, signif- icant reserve effects not only reflected direct interactions between fishing and targeted spe- cies (higher large fish biomass; higher snapper and lobster abundance), but also second order interactions (lower urchin abundance), third order interactions (higher kelp cover), and fourth order interactions (lower understory algal cover). Unexpectedly, we also found: (i) a consistent trend for higher (~20%) Ecklonia cover across reserves relative to nearby fished sites regardless of lobster and urchin density, (ii) an inconsistent response of crustose coral- line algae to urchin density, (iii) low cover of other understory algae in marine reserves with few urchins, and (iv) more variable fish and benthic invertebrate communities at reserve rel- ative to fished locations. Overall, reef food webs showed complex but consistent responses to protection from fishing in well-enforced temperate New Zealand marine reserves. The small proportion of the northeastern New Zealand coastal zone located within marine reserves (~0.2%) encompassed a disproportionately large representation of the full range of fish and benthic invertebrate biodiversity within this region.", "link"=>"http://www.mendeley.com/research/consistent-multilevel-trophic-effects-marine-reserve-protection-across-northern-new-zealand-2", "reader_count"=>16, "reader_count_by_academic_status"=>{"Researcher"=>2, "Student > Ph. D. Student"=>4, "Student > Master"=>8, "Student > Bachelor"=>1, "Lecturer > Senior Lecturer"=>1}, "reader_count_by_user_role"=>{"Researcher"=>2, "Student > Ph. D. Student"=>4, "Student > Master"=>8, "Student > Bachelor"=>1, "Lecturer > Senior Lecturer"=>1}, "reader_count_by_subject_area"=>{"Environmental Science"=>5, "Agricultural and Biological Sciences"=>10, "Earth and Planetary Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>10}, "Environmental Science"=>{"Environmental Science"=>5}}, "group_count"=>1}

Scopus | Further Information

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