scholarly journals Evidence for rapid recovery of shark populations within a coral reef marine protected area

2018 ◽  
Author(s):  
Conrad Speed
Keyword(s):  
Marine Protected Areas ◽  
Protected Area ◽  
Marine Protected Area ◽  
Underwater Video ◽  
Limited Evidence ◽  
Demographic Models ◽  
Strict Enforcement ◽  
Reef Sharks ◽  
Over Exploitation

There is limited evidence on the rate at which the shark populations of coral reefs can rebound from over-exploitation, the baselines that might signify when recovery has occurred and the role of no-take Marine Protected Areas (MPA) in aiding this process. We surveyed shark assemblages at Ashmore Reef in Western Australia using baited remote underwater video stations in 2004 prior to enforcement of MPA status and then again in 2016 after eight years of strict enforcement. We found an increase in the relative mean abundance of Carcharhinus amblyrhynchos from 0.16 ± 0.06 individuals h−1 in 2004 to 0.74 ± 0.11 individuals h−1 in 2016, a change that was also accompanied by a shift in the assemblage of sharks to greater proportions of apex species (from 7.1% to 11.9%) and reef sharks (from 28.6% to 57.6%), and a decrease in the proportional abundance of lower trophic level species (from 64.3% to 30.5%). Abundances and trophic assemblage of sharks at Ashmore Reef in 2004 resembled those of the Scott Reefs, where targeted fishing for sharks still occurs, whereas in 2016, abundances and trophic structures had recovered to resemble those of the Rowley Shoals, a reef system that has been a strictly enforced MPA for over 25 years. The shift in abundance and community structure coincident with strict enforcement of the MPA at Ashmore Reef has occurred at a rate greater than predicted by demographic models, implying the action of compensatory processes in recovery. Our study shows that shark communities can recover rapidly after exploitation in a well-managed no-take MPA.

scholarly journals Marine protected area governance: Prospects for co-management in the European Mediterranean

2013 ◽  
Vol 4 (2) ◽  
pp. 241 ◽  
Author(s):  
Katie Hogg ◽  
Pedro Noguera-Méndez ◽  
María Semitiel-García ◽  
María Giménez-Casalduero
Keyword(s):  
Social Capital ◽  
Protected Areas ◽  
Marine Protected Areas ◽  
Protected Area ◽  
Marine Protected Area ◽  
Participatory Approach ◽  
Top Down ◽  
Management Processes ◽  
The Mediterranean

Marine protected areas (MPAs) raise serious challenges in terms of their governance. By applying a participatory approach co-management can help in overcoming many of the deficiencies of top-down management processes. Yet, despite benefits of co-management, it is still found to be the exception in the Mediterranean. This paper provides a review of co-management and the prospects for decentralisation in the European Mediterranean. The role of social capital (SC) in co-management is discussed and a framework for SC and participation to attain effective co-management is proposed.

scholarly journals Guidelines for Marine Protected Areas

2000 ◽  
Vol 6 (4) ◽  
pp. 352
Author(s):  
Mark Westera
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Site Selection ◽  
Protected Area ◽  
Marine Protected Area ◽  
Legal Framework ◽  
Economic Aspect ◽  
Financial Sustainability ◽  
Broad Application

Guidelines to marine protected areas is a collation of efforts from the IUCN, NOAA and Cardiff University, among others. It is aimed at managers and would be managers of marine parks, but will also be of use to anyone involved in the Marine Protected Area (MPA) process from conceptual planning to establishment, monitoring and management. Its broad application takes into account the hurdles that a manager is likely to encounter. There are nine sections, an introduction, an evaluation of the legal framework required to successfully establish MPAs, a discussion on dealing with all the relevant parties, involving communities and other stakeholders, site selection, planning and managing MPAs, zoning, evaluating economic aspect and financial sustainability, and finally a section on research, monitoring and review. Boxes are used throughout the text within each chapter to summarize important points and make for quick reference to the topic of that chapter.

Estimating marine protected area network benefits for reef sharks

2020 ◽  
Vol 57 (10) ◽  
pp. 1969-1980
Author(s):  
Gerardo Martín ◽  
Mario Espinoza ◽  
Michelle Heupel ◽  
Colin A. Simpfendorfer
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Area Network ◽  
Protected Area Network ◽  
Reef Sharks

scholarly journals Spain and Marine Protected Areas: Recent Developments

2018 ◽  
Vol 33 (4) ◽  
pp. 847-855
Author(s):  
Mariano J. Aznar
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Protected Area ◽  
Biological Diversity ◽  
Marine Protected Area ◽  
Natura 2000 ◽  
Convention On Biological Diversity ◽  
Recent Developments ◽  
Barcelona Convention ◽  
Specially Protected Areas

Abstract Spain has just declared a new marine protected area in the Mediterranean. This follows a protective trend taken by Spanish authorities during the last decades and has permitted Spain to honour its international compromises under the Convention on Biological Diversity. It contributes to a framework of protected areas established under conventional regimes such as OSPAR, RAMSAR or EU Natura 2000. The new area protects a ‘cetacean corridor’ and will be inscribed in the list of Specially Protected Areas of Mediterranean Importance under the Barcelona Convention regional framework.

scholarly journals Benthic impacts of recreational divers in a Mediterranean Marine Protected Area

2009 ◽  
Vol 66 (3) ◽  
pp. 517-523 ◽  
Author(s):  
Beatriz Luna ◽  
Carlos Valle Pérez ◽  
Jose Luis Sánchez-Lizaso
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Natural Environment ◽  
Protected Area ◽  
Marine Protected Area ◽  
Scuba Diving ◽  
Field Sampling ◽  
Frequent Type ◽  
Recreational Scuba ◽  
Benthic Impacts

Abstract Luna, B., Valle Pérez, C., and Sánchez-Lizaso, J. L. 2009. Benthic impacts of recreational divers in a Mediterranean Marine Protected Area. – ICES Journal of Marine Science, 66: 517–523. The features of many Marine Protected Areas (MPAs) have increased scuba diving tourism in these areas. Impacts caused by recreational scuba activity vary widely among different divers with differing underwater behaviour. We studied diver underwater behaviour, the effects on the natural environment, and the characteristics that may influence diver behaviour. In all, 181 recreational divers were followed, and contacts and the effects produced were recorded. Information on diver profile and dive features was recorded. Field sampling revealed that 175 of the divers observed (96.7%) made at least one contact with the seabed, with a mean contact of 41.20 ± 3.55 (mean ± s.e.) per diver per 10 min. Flapping was the most frequent type of contact, and the main damage by this action was to raise sediment. Contact with the seabed was greater for males than for females, inexperienced divers than for experienced divers, camera or lantern (dive light) users than for non-users, and divers unaccompanied by a dive leader or who had not been briefed about avoiding seabed contact before undertaking a dive than for accompanied or briefed divers. A greater understanding of the causes of harmful behaviour may be useful for stricter management, reducing diving damage and assuring the sustainability of this activity in MPAs.

scholarly journals Landscape configuration of seagrass meadows regulates sea urchins predation in a Marine Protected Area: what is the role of bottom predators?

2015 ◽  
Author(s):  
Simone Farina ◽  
Silvia Oliva ◽  
Ivan Guala ◽  
Rodrigo Silva ◽  
Luigi Piazzi ◽  
...  
Keyword(s):  
Predation Risk ◽  
Sea Urchin ◽  
Protected Area ◽  
Marine Protected Area ◽  
Sea Urchins ◽  
Survival Rates ◽  
Landscape Configuration ◽  
Benthic Assemblages ◽  
Seagrass Meadows

In Mediterranean benthic ecosystems of shallow water local-scale predation maintains a main control on both sea urchin population and the ecological structure of macrophyte community. The use of the habitat by local predator guild in dependence on the regional context shapes prey distributions across the environment. On rocky habitat, the sea urchin Paracentrotus lividus is widely known as prey of apex fish predators that indirectly shape the structure of benthic assemblages whereas, in structured Posidonia oceanica, P. lividus can find shelter from predators. In this study, we assessed survival rates of P. lividus in a Marine Protected Area (Sardinia) at the aim to evaluate the role of composition and configuration of landscape on its predation risk. Sites of different landscapes were selected in function of their heterogeneity estimated according to the different proportions and spatial interspersion of four classes of habitats defined on the basis of P. oceanica meadows arrangement: (1) continuous, (2) fragmented and (3) patchy meadows and (4) absence of seagrass (i.e. rocky bottom with macroalgae communities). In order to capture the domain of the ecological process a sampling grain 5x5 meters was used as minimal spatial resolution at which information is assessed. Specifically continuous sampling units in a grid of 7x7 cells yield landscape quadrats of 35 × 35 m and allowed a finer description of the spatial pattern. For each cell we also estimated structural variables of seagrass habitats such as unburied mat, shoot density, canopy height, cover percent, roughness and the natural abundances of prey and predators. After placing the tagged sea urchins, we daily observed the survival rates for twenty days. Predation risk was significantly higher in continuous and fragmented seagrass habitats and predator marks were typically produced by gastropod’s attacks. Landscape indices are used to correlate the amount of available habitat for gastropods movements with sea urchin’s predation risk. Interestingly, estimated predation rate also was negatively correlated with natural sea urchins density across grid cells. Results suggest that, although fishes are considered among the most important pressures on sea urchin population, especially in effective MPAs, bottom predators’ control can be relevant in structurally complex environment such as seagrasses.

scholarly journals Landscape configuration of seagrass meadows regulates sea urchins predation in a Marine Protected Area: what is the role of bottom predators?

2015 ◽  
Author(s):  
Simone Farina ◽  
Silvia Oliva ◽  
Ivan Guala ◽  
Rodrigo Silva ◽  
Luigi Piazzi ◽  
...  
Keyword(s):  
Predation Risk ◽  
Sea Urchin ◽  
Protected Area ◽  
Marine Protected Area ◽  
Sea Urchins ◽  
Survival Rates ◽  
Landscape Configuration ◽  
Benthic Assemblages ◽  
Seagrass Meadows

In Mediterranean benthic ecosystems of shallow water local-scale predation maintains a main control on both sea urchin population and the ecological structure of macrophyte community. The use of the habitat by local predator guild in dependence on the regional context shapes prey distributions across the environment. On rocky habitat, the sea urchin Paracentrotus lividus is widely known as prey of apex fish predators that indirectly shape the structure of benthic assemblages whereas, in structured Posidonia oceanica, P. lividus can find shelter from predators. In this study, we assessed survival rates of P. lividus in a Marine Protected Area (Sardinia) at the aim to evaluate the role of composition and configuration of landscape on its predation risk. Sites of different landscapes were selected in function of their heterogeneity estimated according to the different proportions and spatial interspersion of four classes of habitats defined on the basis of P. oceanica meadows arrangement: (1) continuous, (2) fragmented and (3) patchy meadows and (4) absence of seagrass (i.e. rocky bottom with macroalgae communities). In order to capture the domain of the ecological process a sampling grain 5x5 meters was used as minimal spatial resolution at which information is assessed. Specifically continuous sampling units in a grid of 7x7 cells yield landscape quadrats of 35 × 35 m and allowed a finer description of the spatial pattern. For each cell we also estimated structural variables of seagrass habitats such as unburied mat, shoot density, canopy height, cover percent, roughness and the natural abundances of prey and predators. After placing the tagged sea urchins, we daily observed the survival rates for twenty days. Predation risk was significantly higher in continuous and fragmented seagrass habitats and predator marks were typically produced by gastropod’s attacks. Landscape indices are used to correlate the amount of available habitat for gastropods movements with sea urchin’s predation risk. Interestingly, estimated predation rate also was negatively correlated with natural sea urchins density across grid cells. Results suggest that, although fishes are considered among the most important pressures on sea urchin population, especially in effective MPAs, bottom predators’ control can be relevant in structurally complex environment such as seagrasses.

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