Consulta: creatorFacets:"Heymans, Johanna J."
Registros recuperados: 7
Data/hora: 10/06/2024 04:40:21

Evaluating changes in marine communities that provide ecosystem services through comparative assessments of community indicators
Provedor de dados: 5
Autores: Kleisner, Kristin M.; Coll, Marta; Lynam, Christopher P.; Bundy, Alida; Shannon, Lynne; Shin, Yunne-jai; Boldt, Jennifer L.; Borges, Maria F.; Diallo, Ibrahima; Fox, Clive; Gascuel, Didier; Heymans, Johanna J.; Juan Jorda, Maria J.; Jouffre, Didier; Large, Scott I.; Marshall, Kristin N.; Ojaveer, Henn; Piroddi, Chiara; Tam, Jorge; Torres, Maria A.; Travers-trolet, Morgane; Tsagarakis, Konstantinos; Van Der Meeren, Gro I.; Zador, Stephani.
Fisheries provide critical provisioning services, especially given increasing human population. Understanding where marine communities are declining provides an indication of ecosystems of concern and highlights potential conflicts between seafood provisioning from wild fisheries and other ecosystem services. Here we use the nonparametric statistic, Kendall׳s tau, to assess trends in biomass of exploited marine species across a range of ecosystems. The proportion of ‘Non-Declining Exploited Species’ (NDES) is compared among ecosystems and to three community-level indicators that provide a gauge of the ability of a marine ecosystem to function both in provisioning and as a regulating service: survey-based mean trophic level, proportion of predatory fish,...
Tipo: Text
Palavras-chave: Ecological indicator; Comparative approach; Community metric; IndiSeas; Fishing impacts.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00254/36555/35186.pdf

A Roadmap for Using the UN Decade of Ocean Science for Sustainable Development in Support of Science, Policy, and Action
Provedor de dados: 5
Autores: Claudet, Joachim; Bopp, Laurent; Cheung, William W.l.; Devillers, Rodolphe; Escobar-briones, Elva; Haugan, Peter; Heymans, Johanna J.; Masson-delmotte, Valérie; Matz-lück, Nele; Miloslavich, Patricia; Mullineaux, Lauren; Visbeck, Martin; Watson, Robert; Zivian, Anna Milena; Ansorge, Isabelle; Araujo, Moacyr; Aricò, Salvatore; Bailly, Denis; Barbière, Julian; Barnerias, Cyrille; Bowler, Chris; Brun, Victor; Cazenave, Anny; Diver, Cameron; Euzen, Agathe; Gaye, Amadou Thierno; Hilmi, Nathalie; Ménard, Frédéric; Moulin, Cyril; Muñoz, Norma Patricia; Parmentier, Rémi; Pebayle, Antoine; Pörtner, Hans-otto; Osvaldina, Silva; Ricard, Patricia; Santos, Ricardo Serrão; Sicre, Marie-alexandrine; Thiébault, Stéphanie; Thiele, Torsten; Troublé, Romain; Turra, Alexander; Uku, Jacqueline; Gaill, Françoise.
The health of the ocean, central to human well-being, has now reached a critical point. Most fish stocks are overexploited, climate change and increased dissolved carbon dioxide are changing ocean chemistry and disrupting species throughout food webs, and the fundamental capacity of the ocean to regulate the climate has been altered. However, key technical, organizational, and conceptual scientific barriers have prevented the identification of policy levers for sustainability and transformative action. Here, we recommend key strategies to address these challenges, including (1) stronger integration of sciences and (2) ocean-observing systems, (3) improved science-policy interfaces, (4) new partnerships supported by (5) a new ocean-climate finance system,...
Tipo: Text
Palavras-chave: Ocean health; Human well-being; United Nations; Policy levers; Sustainability; Transformative actions; Strategy.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00637/74861/75262.pdf

Making ecological indicators management ready: Assessing the specificity, sensitivity, and threshold response of ecological indicators
Provedor de dados: 5
Autores: Fu, Caihong; Xu, Yi; Bundy, Alida; Grüss, Arnaud; Coll, Marta; Heymans, Johanna J.; Fulton, Elizabeth A.; Shannon, Lynne; Halouani, Ghassen; Velez, Laure; Akoğlu, Ekin; Lynam, Christopher P.; Shin, Yunne-jai.
Moving toward ecosystem-based fisheries management (EBFM) necessitates a suite of ecological indicators that are responsive to fishing pressure, capable of tracking changes in the state of marine ecosystems, and related to management objectives. In this study, we employed the gradient forest method to assess the performance of 14 key ecological indicators in terms of specificity, sensitivity and the detection of thresholds for EBFM across ten marine ecosystems using four modelling frameworks (Ecopath with Ecosim, OSMOSE, Atlantis, and a multi-species size-spectrum model). Across seven of the ten ecosystems, high specificity to fishing pressure was found for most of the 14 indicators. The indicators biomass to fisheries catch ratio (B/C), mean lifespan and...
Tipo: Text
Palavras-chave: Ecological modelling; Fishing pressure; Gradient forest method; Indictor performance; Marine ecosystem; Primary productivity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61148/64576.pdf

The Role of Stakeholders in Creating Societal Value From Coastal and Ocean Observations
Provedor de dados: 5
Autores: Mackenzie, Bev; Celliers, Louis; De Freitas Assad, Luiz Paulo; Heymans, Johanna J.; Rome, Nicholas; Thomas, Julie; Anderson, Clarissa; Behrens, James; Calverley, Mark; Desai, Kruti; Digiacomo, Paul M.; Djavidnia, Samy; Dos Santos, Francisco; Eparkhina, Dina; Ferrari, Jose; Hanly, Caitriona; Houtman, Bob; Jeans, Gus; Landau, Luiz; Larkin, Kate; Legler, David; Le Traon, Pierre-yves; Lindstrom, Eric; Loosley, David; Nolan, Glenn; Petihakis, George; Pellegrini, Julio; Roberts, Zoe; Siddorn, John R.; Smail, Emily; Sousa-pinto, Isabel; Terrill, Eric.
The importance of stakeholder engagement in ocean observation and in particular the realization of economic and societal benefits is discussed, introducing a number of overarching principles such as the convergence on common goals, effective communication, co-production of information and knowledge and the need for innovation. A series of case studies examine the role of coordinating frameworks such as the United States' Interagency Ocean Observing System (IOOS (R)), and the European Ocean Observing System (EGOS), public-private partnerships such as Project Azul and the Coastal Data Information Program (CDIP) and finally the role of the "third" or voluntary sector. The paper explores the value that stakeholder engagement can bring as well as making...
Tipo: Text
Palavras-chave: Ocean observing systems; Stakeholder engagement; Case studies; Societal benefits; SDG14.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00497/60879/64221.pdf

Risky business: The combined effects of fishing and changes in primary productivity on fish communities
Provedor de dados: 5
Autores: Fu, Caihong; Travers-trolet, Morgane; Velez, Laure; Gruss, Arnaud; Bundy, Alida; Shannon, Lynne J.; Fulton, Elizabeth A.; Akoglu, Ekin; Houle, Jennifer E.; Coll, Marta; Verley, Philippe; Heymans, Johanna J.; John, Emma; Shin, Yunne-jai.
There is an increasing need to understand community-level or whole-ecosystem responses to multiple stressors since the impacts of multiple stressors on marine systems depend not only on species- level responses, but also on species interactions and ecosystem structure. In this study, we used a multi-model ecosystem simulation approach to explore the combined effects of fishing and primary productivity on different components of the food-web across a suite of ecosystems and a range of model types. Simulations were carried out under different levels of primary productivity and various fishing scenarios (targeting different trophic levels). Previous work exploring the effects of multiple stressors often assumed that the combined effects of stressors are...
Tipo: Text
Palavras-chave: Marine ecosystem; Fishing; Combined effect; Meta-analysis; Synergism; Multiple drivers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00414/52542/53368.pdf

Effects of Nutrient Management Scenarios on Marine Food Webs: A Pan-European Assessment in Support of the Marine Strategy Framework Directive
Provedor de dados: 5
Autores: Piroddi, Chiara; Akoglu, Ekin; Andonegi, Eider; Bentley, Jacob W.; Celić, Igor; Coll, Marta; Dimarchopoulou, Donna; Friedland, René; De Mutsert, Kim; Girardin, Raphael; Garcia-gorriz, Elisa; Grizzetti, Bruna; Hernvann, P.-y.; Heymans, Johanna J.; Müller-karulis, Bärbel; Libralato, Simone; Lynam, Christopher P.; Macias, Diego; Miladinova, Svetla; Moullec, Fabien; Palialexis, Andreas; Parn, Ove; Serpetti, Natalia; Solidoro, Cosimo; Steenbeek, Jeroen; Stips, Adolf; Tomczak, Maciej T.; Travers-trolet, Morgane; Tsikliras, Athanassios C.
Eutrophication is one of the most important anthropogenic pressures impacting coastal seas. In Europe, several legislations and management measures have been implemented to halt nutrient overloading in marine ecosystems. This study evaluates the impact of freshwater nutrient control measures on higher trophic levels (HTL) in European marine ecosystems following descriptors and criteria as defined by the Marine Strategy Framework Directive (MSFD). We used a novel pan-European marine modeling ensemble of fourteen HTL models, covering almost all the EU seas, under two nutrient management scenarios. Results from our projections suggest that the proposed nutrient reduction measures may not have a significant impact on the structure and function of European...
Tipo: Text
Palavras-chave: Ecological modeling; Hydrological modeling; Hydrodynamic and biogeochemical modeling; Higher trophic level modeling; Ecological indicators; Criteria; Policy support.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79746/82520.pdf

The Ocean Decade: A True Ecosystem Modeling Challenge
Provedor de dados: 5
Autores: Heymans, Johanna J.; Bundy, Alida; Christensen, Villy; Coll, Marta; De Mutsert, Kim; Fulton, Elizabeth A.; Piroddi, Chiara; Shin, Yunne-jai; Steenbeek, Jeroen; Travers-trolet, Morgane.
Tipo: Text
Palavras-chave: Ocean Decade; Ecosystem modeling; Climate change; Ecosystem based management (EBM); Sustainable development goals (SDG).
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76379/77386.pdf