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      Combined effects of human pressures on Europe’s marine ecosystems

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          Abstract

          Marine ecosystems are under high demand for human use, giving concerns about how pressures from human activities may affect their structure, function, and status. In Europe, recent developments in mapping of marine habitats and human activities now enable a coherent spatial evaluation of potential combined effects of human activities. Results indicate that combined effects from multiple human pressures are spread to 96% of the European marine area, and more specifically that combined effects from physical disturbance are spread to 86% of the coastal area and 46% of the shelf area. We compare our approach with corresponding assessments at other spatial scales and validate our results with European-scale status assessments for coastal waters. Uncertainties and development points are identified. Still, the results suggest that Europe’s seas are widely disturbed, indicating potential discrepancy between ambitions for Blue Growth and the objective of achieving good environmental status within the Marine Strategy Framework Directive.

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          The online version of this article (10.1007/s13280-020-01482-x) contains supplementary material, which is available to authorized users.

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          Most cited references40

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          A global map of human impact on marine ecosystems.

          The management and conservation of the world's oceans require synthesis of spatial data on the distribution and intensity of human activities and the overlap of their impacts on marine ecosystems. We developed an ecosystem-specific, multiscale spatial model to synthesize 17 global data sets of anthropogenic drivers of ecological change for 20 marine ecosystems. Our analysis indicates that no area is unaffected by human influence and that a large fraction (41%) is strongly affected by multiple drivers. However, large areas of relatively little human impact remain, particularly near the poles. The analytical process and resulting maps provide flexible tools for regional and global efforts to allocate conservation resources; to implement ecosystem-based management; and to inform marine spatial planning, education, and basic research.
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            Interactive and cumulative effects of multiple human stressors in marine systems.

            Humans impact natural systems in a multitude of ways, yet the cumulative effect of multiple stressors on ecological communities remains largely unknown. Here we synthesized 171 studies that manipulated two or more stressors in marine and coastal systems and found that cumulative effects in individual studies were additive (26%), synergistic (36%), and antagonistic (38%). The overall interaction effect across all studies was synergistic, but interaction type varied by response level (community: antagonistic, population: synergistic), trophic level (autotrophs: antagonistic, heterotrophs: synergistic), and specific stressor pair (seven pairs additive, three pairs each synergistic and antagonistic). Addition of a third stressor changed interaction effects significantly in two-thirds of all cases and doubled the number of synergistic interactions. Given that most studies were performed in laboratories where stressor effects can be carefully isolated, these three-stressor results suggest that synergies may be quite common in nature where more than two stressors almost always coexist. While significant gaps exist in multiple stressor research, our results suggest an immediate need to account for stressor interactions in ecological studies and conservation planning.
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              Spatial and temporal changes in cumulative human impacts on the world's ocean

              Human pressures on the ocean are thought to be increasing globally, yet we know little about their patterns of cumulative change, which pressures are most responsible for change, and which places are experiencing the greatest increases. Managers and policymakers require such information to make strategic decisions and monitor progress towards management objectives. Here we calculate and map recent change over 5 years in cumulative impacts to marine ecosystems globally from fishing, climate change, and ocean- and land-based stressors. Nearly 66% of the ocean and 77% of national jurisdictions show increased human impact, driven mostly by climate change pressures. Five percent of the ocean is heavily impacted with increasing pressures, requiring management attention. Ten percent has very low impact with decreasing pressures. Our results provide large-scale guidance about where to prioritize management efforts and affirm the importance of addressing climate change to maintain and improve the condition of marine ecosystems.
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                Author and article information

                Contributors
                samuli.korpinen@syke.fi
                Journal
                Ambio
                Ambio
                Ambio
                Springer Netherlands (Dordrecht )
                0044-7447
                1654-7209
                28 January 2021
                28 January 2021
                July 2021
                : 50
                : 7
                : 1325-1336
                Affiliations
                [1 ]GRID grid.410381.f, ISNI 0000 0001 1019 1419, Marine Research Centre, , Finnish Environment Institute (SYKE), ; Helsinki, Finland
                [2 ]GRID grid.6341.0, ISNI 0000 0000 8578 2742, Department of Aquatic Resources, , Swedish University of Agricultural Sciences, ; Uppsala, Sweden
                [3 ]NIVA Denmark Water Research, Copenhagen, Denmark
                [4 ]GRID grid.493878.9, ISNI 0000 0001 0940 3568, HELCOM Secretariat, ; Helsinki, Finland
                [5 ]GRID grid.453985.6, ISNI 0000 0004 0619 3405, European Environment Agency (EEA), ; Copenhagen, Denmark
                [6 ]GRID grid.457123.6, Institute for Water of the Republic of Slovenia (IZVRS), ; Ljubljana, Slovenia
                [7 ]GRID grid.22859.34, ISNI 0000 0004 0467 2445, EcoLogic, ; Berlin, Germany
                [8 ]GRID grid.423782.8, ISNI 0000 0001 2205 5473, Italian National Institute for Environmental Protection and Research (ISPRA), ; Rome, Italy
                [9 ]GRID grid.435540.3, ISNI 0000 0001 1954 7645, Joint Nature Conservation Committee (JNCC), ; Peterborough, UK
                Author information
                http://orcid.org/0000-0001-6024-1250
                Article
                1482
                10.1007/s13280-020-01482-x
                8116428
                33507497
                a6a3a581-8ec6-4984-9247-a7afdec380c2
                © The Author(s) 2021

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 21 September 2020
                : 26 November 2020
                : 14 December 2020
                Funding
                Funded by: FundRef http://dx.doi.org/10.13039/501100000806, European Environment Agency;
                Funded by: Finnish Environment Institute (SYKE)
                Categories
                Perspective
                Custom metadata
                © Royal Swedish Academy of Sciences 2021

                Sociology
                anthropogenic pressures,cumulative effect assessments,europe's seas,human activities,marine assessment,marine management

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