Article
Green & Sustainable Science & Technology
A. Justin Nowakowski, Steven W. J. Canty, Nathan J. Bennett, Courtney E. Cox, Abel Valdivia, Jessica L. Deichmann, Thomas S. Akre, Sara E. Bonilla-Anariba, Sebastien Costedoat, Melanie McField
Summary: This study provides quantitative evidence that marine protected areas (MPAs) in the Mesoamerican region deliver co-benefits for fish and people, as indicated by higher fish abundances and improved well-being indicators near MPAs.
NATURE SUSTAINABILITY
(2023)
Article
Biodiversity Conservation
Shelby L. Ziegler, Rachel O. Brooks, Scott L. Hamilton, Benjamin I. Ruttenberg, Jennifer A. Chiu, Ryan T. Fields, Grant T. Waltz, Chenchen Shen, Dean E. Wendt, Richard M. Starr
Summary: Marine protected areas (MPAs) are established worldwide to mitigate the effects of various stressors on marine communities. This study found that the impacts of MPAs on fish communities are influenced by fishing pressure and environmental factors. Specifically, MPAs have the strongest positive effects on heavily exploited fish communities. Therefore, it is important for managers to consider both human-induced stressors and environmental conditions when establishing MPAs, as well as implement long-term monitoring programs to assess their functionality.
BIOLOGICAL CONSERVATION
(2022)
Article
Ecology
Sarah Ohayon, Itai Granot, Jonathan Belmaker
Summary: The study found that there may be edge effects within marine protected areas, resulting in 60% smaller populations of fish and invertebrates at the borders compared to the core areas.
NATURE ECOLOGY & EVOLUTION
(2021)
Article
Biodiversity Conservation
Benn J. Hanns, Tim Haggitt, Nick T. Shears
Summary: Fisheries stock assessments based on fisheries dependent data often have high uncertainty. This study proposes using marine reserves as a proxy for unfished biomass to assess stock status. The study shows that lobster populations in fished areas adjacent to marine reserves have significantly lower catch rates and biomass compared to unfished levels, suggesting that marine reserves can provide valuable information for stock assessments.
BIOLOGICAL CONSERVATION
(2022)
Article
Zoology
Charlotte E. Davies
Summary: Marine protected areas have shown overwhelmingly positive effects on fish biomass, recovery, and diversity, but there is a lack of research on the impact of MPAs on parasite and disease dynamics, specifically invertebrate health. The implementation of MPAs can alter trophic cascades and community dynamics, highlighting the importance of investigating the status of invertebrates in these protected areas.
JOURNAL OF INVERTEBRATE PATHOLOGY
(2021)
Article
Environmental Sciences
Katherine D. Millage, Juan Carlos Villasenor-Derbez, Darcy Bradley, Matthew G. Burgess, Hunter S. Lenihan, Christopher Costello
Summary: Marine protected areas are important for conservation, but the increase in fish biomass within MPAs creates incentives for poaching. Fishing activities persist in most MPAs worldwide, raising concerns about monitoring and enforcement. A proposal for a Conservation Finance Area (CFA) utilizes leased fishing zones within MPAs to finance monitoring and enforcement, leading to greater conservation success.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Lucas Bonnin, David Mouillot, Germain Boussarie, William D. Robbins, Jeremy J. Kiszka, Laurent Dagorn, Laurent Vigliola
Summary: Research conducted in New Caledonia on grey reef sharks revealed significant differences in home range size between adult males and females, with historic MPAs appearing inadequate to protect these sharks. Larger MPAs recently established in the Indo-Pacific region show promise in adequately protecting the home ranges of reef sharks, including males, across their geographical range, although global protection efforts are still lacking.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Steven Mana'oakamai Johnson, James R. Watson
Summary: Climate change is altering the biogeochemical conditions of the ocean, leading to the emergence of novel environmental conditions within very large marine protected areas (VLMPAs). By 2100, a significant portion of the ocean and VLMPAs are expected to contain novel conditions, with pH conditions becoming novel by 2030. Management strategies for VLMPAs will need to be adjusted to account for these changing environmental conditions.
Review
Multidisciplinary Sciences
Genevieve A. C. Phillips, Nils Krueck, Emily Ogier, Neville Barrett, Ian Dutton, Klaas Hartmann
Summary: In order to protect biodiversity and achieve the 30 by 30 goal, fully protected marine protected areas (MPAs) are important, but they may limit economic and social benefits. Partially protected areas (PPAs) allow for some extractive activities while aiming to conserve biodiversity and provide social and economic benefits. This study aims to review the implementation of PPAs in Australia and provide insights for global marine resource managers.
Article
Multidisciplinary Sciences
Samantha Cope, Brendan Tougher, Jessica Morten, Cory Pukini, Virgil Zetterlind
Summary: Marine protected areas (MPAs) are widely used for conserving marine resources. A study used an autonomous vessel monitoring system to continuously monitor five nearshore California MPAs and found potential illegal fishing activity occurring at all sites, although most of the activity was just outside the MPAs and in the near vicinity. The study suggests a high level of compliance with regulations and awareness of MPA boundaries, and highlights the importance of continuous monitoring at a high spatial and temporal resolution.
Article
Multidisciplinary Sciences
Shelby L. Ziegler, Jasmin M. Johnson, Rachel O. Brooks, Erin M. Johnston, Jacklyn L. Mohay, Benjamin I. Ruttenberg, Richard M. Starr, Grant T. Waltz, Dean E. Wendt, Scott L. Hamilton
Summary: Anthropogenic stressors from climate change can impact individual species, community structure, and ecosystem function. Marine heatwaves (MHWs), characterized by significantly elevated water temperature for five or more days, are projected to increase in frequency and severity. While marine protected areas (MPAs) may mitigate climate impacts on individual species, their ability to address large-scale changes in marine communities caused by MHWs is uncertain.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Guido Leurs, Karin J. van der Reijden, Sidi Yahya Cheikhna Lemrabott, Ica Barry, Diosnes Manuel Nonque, Han Olff, Samuel Ledo Pontes, Aissa Regalla, Laura L. Govers
Summary: The study reveals that industrial fishing activities are mainly concentrated in the buffer zones near MPAs, which can have impacts on elasmobranch species, especially predatory species. The bycatch of elasmobranchs varies in different seasons in the waters of Mauritania and Guinea Bissau.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biodiversity Conservation
April Hall, Darren Cameron, Michael Kingsford
Summary: Partially Protected Areas (PPAs) are a common management tool, but their ecological effects are often poorly understood. This study found that Special Management Areas (SMAs), where spearfishing is prohibited, had better conservation outcomes for targeted fishes compared to Conservation Park Zones (CPZs), where spearfishing is allowed. The results also showed that the success of PPAs did not differ between exposed and sheltered sides of reefs.
BIOLOGICAL CONSERVATION
(2022)
Article
Environmental Sciences
Deborah Santos Prado, Cristiana Simao Seixas, Micaela Trimble
Summary: This article emphasizes the importance of the co-management process and identifies factors that contribute to the progress of formal and informal co-management in two protected areas in coastal Brazil. The factors include catalytic factors such as crises and political identity, as well as structural factors such as community power and citizenship resources.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Environmental Sciences
Michael Kriegl, Xochitl E. Elias Ilosvay, Christian von Dorrien, Daniel Oesterwind
Summary: Marine protected areas (MPAs) are designated parts of the ocean that restrict human activities to a certain degree. Despite being regarded as the cornerstone of global marine conservation efforts, they currently cover less than 10% of the ocean surface.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Timothy R. McClanahan, Maxwell Kodia Azali
FISH AND FISHERIES
(2020)
Article
Multidisciplinary Sciences
Joshua E. Cinner, Jessica Zamborain-Mason, Georgina G. Gurney, Nicholas A. J. Graham, M. Aaron MacNeil, Andrew S. Hoey, Camilo Mora, Sebastien Villeger, Eva Maire, Tim R. McClanahan, Joseph M. Maina, John N. Kittinger, Christina C. Hicks, Stephanie D'agata, Cindy Huchery, Michele L. Barnes, David A. Feary, Ivor D. Williams, Michel Kulbicki, Laurent Vigliola, Laurent Wantiez, Graham J. Edgar, Rick D. Stuart-Smith, Stuart A. Sandin, Alison L. Green, Maria Beger, Alan M. Friedlander, Shaun K. Wilson, Eran Brokovich, Andrew J. Brooks, Juan J. Cruz-Motta, David J. Booth, Pascale Chabanet, Mark Tupper, Sebastian C. A. Ferse, U. Rashid Sumaila, Marah J. Hardt, David Mouillot
Article
Marine & Freshwater Biology
T. R. McClanahan
Article
Environmental Sciences
Timothy R. McClanahan, Alan M. Friedlander, Nicholas A. J. Graham, Pascale Chabanet, J. Henrich Bruggemann
Summary: Reef fish biomass is considered a key indicator of fishery and biodiversity status on coral reefs, but studies on appropriate baselines and the factors driving variation in baselines are limited. Field studies on 223 reef sites revealed that human habitation is the strongest predictor of biomass in 'no fishing' areas. Human travel time and closure age were found to influence fish biomass in remote areas and high-compliance closures, while habitat, depth, and closure age were key predictors in small and recent closures.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Editorial Material
Environmental Sciences
T. R. McClanahan
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Fisheries
Timothy R. McClanahan, Emily S. Darling, Sangeeta Mangubhai, Georgina G. Gurney, W. Peni Lestari, Margaret Fox, Stacy D. Jupiter, Dhila A. Yulistianti, Nyawira A. Muthiga, Stephanie D'agata
Summary: The effectiveness and outcomes of management are expected to improve when individuals are informed, engaged, and influential in governance and management procedures. However, social-ecological and demographic contexts can influence an individual's perceptions and willingness to engage in management, hence the importance of evaluating the impact of geographic and social-ecological contexts on management.
FISH AND FISHERIES
(2021)
Article
Fisheries
Timothy R. McClanahan, Alan M. Friedlander, Laurent Wantiez, Nick A. J. Graham, J. Henrich Bruggemann, Pascale Chabanet, Remy M. Oddenyo
Summary: Current best-practice policy recommendations for managing fish stocks involve maintaining modest fishing mortality, establishing marine reserve networks, and not subsidizing unprofitable fisheries. However, the effectiveness of these proposed approaches for maintaining fish stocks and biodiversity in marine seascapes is rarely evaluated. Both recommended and unrecommended fishing practices can have unexpected consequences on habitat fragmentation and metapopulation connectivity.
FISH AND FISHERIES
(2022)
Review
Environmental Sciences
T. R. McClanahan
Summary: This article provides a brief historical narrative of coral responses to climate change exposures, followed by a review of evidence from multiple-site field studies. The findings reveal that environmental variables, especially excess thermal exposure, play a crucial role in coral bleaching and mortality response. Two categories of investigations, focused on excess thermal stress thresholds (TM) or continuous variables (VM), were identified, with TM investigations receiving more citations and being used to identify future climate change impacts and sanctuaries. The study emphasizes the importance of considering additive and interactive mechanisms of causation in coral responses to exposure. Additionally, it points out that some important variables for predicting coral responses have been seldom studied or modeled. The future status and health of coral reefs is expected to be better than predicted by TM investigations.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
T. R. McClanahan
Summary: The negative trade-offs between food production and biodiversity, as well as the positive relationship between functional diversity and productivity, are frequently discussed in conservation and sustainability science. A study of coral reef locations in the Western Indian Ocean found that management for multispecies-maximum sustained yield (MMSY) can increase both food production and species numbers. However, additional conservation mechanisms are needed to prevent species loss.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
S. J. Bryan P. Galligan, Timothy R. McClanahan, Austin T. Humphries
Summary: Coral reef artisanal fisheries play an important role in coastal communities' nutrition and economic wellbeing, but their management encounters conflicts between short-term food security and long-term ecological function. This study examines the tradeoff between nutrient capture and fish yields in different traps, finding that targeting small, nutrient-dense species can improve food security while using a gear that captures larger and more sustainable body sizes enhances nutrient yields in coral reef artisanal fisheries. However, it is important to consider the potential negative implications for ecological functions and reef recovery.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Biodiversity Conservation
Tim R. Mcclanahan
Summary: Commons' problems and solutions require accessing, implementing, and coordinating information and actions at multiple scales. Stakeholders' understanding of information use and governance methods plays a crucial role in resolving conflicts and addressing restrictions in commons, such as fisheries. Localized and proximate issues are often prioritized, while distal problems and solutions may be overlooked. To address both proximate and distal problems, improved coordination and integration of information and institutions are recommended.
CONSERVATION BIOLOGY
(2023)
Article
Biodiversity Conservation
T. R. Mcclanahan
Summary: Strong social-ecological trade-offs pose challenges for large, protected area management in resource-dependent countries. Local governments and community conservation activities are becoming common and information about low environmental exposure and high biodiversity can assist in planning localized conservation activities.
DIVERSITY AND DISTRIBUTIONS
(2023)
Article
Biology
James P. W. Robinson, Emily S. Darling, Eva Maire, Mark Hamilton, Christina C. Hicks, Stacy D. Jupiter, M. Aaron MacNeil, Sangeeta Mangubhai, Tim Mcclanahan, Yashika Nand, Nicholas A. J. Graham
Summary: Coral reef fisheries provide nutritious catch to tropical communities, but current management strategies focus on total reef fish biomass rather than individual growth and nutrient content, limiting the sustainability of nutritious catches.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biodiversity Conservation
Tim McClanahan, Vikash Munbodhe, Josheena Naggea, Nyawira Muthiga, Ranjeet Bhagooli
Summary: Mauritius is reported to have the highest marine species endemism in the Western Indian Ocean faunal province, but populations of rare and endemic species are low and patchy. Endemic fish and coral populations were higher on the leeward side of the island, where there is more tourism use and conservation activities. Respondents expressed high concern for the environment and believed that endemic and rare species have a right to survive.
CONSERVATION SCIENCE AND PRACTICE
(2021)
Article
Marine & Freshwater Biology
T. R. McClanahan, Nyawira A. Muthiga
Summary: Understanding the response of temperate corals in Mauritius to chronic and acute environmental stresses over a 15-year period revealed significant declines in coral cover, particularly on windward reefs. The distribution of coral taxa was influenced by island geography and oceanographic conditions, with strong predictor variables including thermal stress anomalies and water flow variability. Frequent acute stress was associated with lower thermal acclimation rates and differential impacts on dominant and subdominant coral taxa.