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      Marine diseases and the Anthropocene: Understanding microbial pathogenesis in a rapidly changing world

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      Microbial Biotechnology
      John Wiley and Sons Inc.

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          Abstract

          Healthy marine ecosystems are paramount for Earth's biodiversity and are key to sustaining the global economy and human health. The effects of anthropogenic activity represent a pervasive threat to the productivity of marine ecosystems, with intensifying environmental stressors such as climate change and pollution driving the occurrence and severity of microbial diseases that can devastate marine ecosystems and jeopardise food security. Despite the potentially catastrophic outcomes of marine diseases, our understanding of host‐pathogen interactions remains an understudied aspect of both microbiology and environmental research, especially when compared to the depth of information available for human and agricultural systems. Here, we identify three avenues of research in which we can advance our understanding of marine disease in the context of global change, and make positive steps towards safeguarding marine communities for future generations.

          Abstract

          Despite the potentially catastrophic outcomes of marine diseases, our understanding of host‐pathogen interactions remains an understudied aspect of both microbiology and environmental research, especially when compared to the depth of information available for human and agricultural systems. Here, we identify three avenues of research in which we can advance our understanding marine disease in the context of global change and make positive steps towards safeguarding marine communities for future generations.

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          Most cited references105

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          Climate change impacts on marine ecosystems.

          In marine ecosystems, rising atmospheric CO2 and climate change are associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification, with potentially wide-ranging biological effects. Population-level shifts are occurring because of physiological intolerance to new environments, altered dispersal patterns, and changes in species interactions. Together with local climate-driven invasion and extinction, these processes result in altered community structure and diversity, including possible emergence of novel ecosystems. Impacts are particularly striking for the poles and the tropics, because of the sensitivity of polar ecosystems to sea-ice retreat and poleward species migrations as well as the sensitivity of coral-algal symbiosis to minor increases in temperature. Midlatitude upwelling systems, like the California Current, exhibit strong linkages between climate and species distributions, phenology, and demography. Aggregated effects may modify energy and material flows as well as biogeochemical cycles, eventually impacting the overall ecosystem functioning and services upon which people and societies depend.
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            The impact of climate change on the world's marine ecosystems.

            Marine ecosystems are centrally important to the biology of the planet, yet a comprehensive understanding of how anthropogenic climate change is affecting them has been poorly developed. Recent studies indicate that rapidly rising greenhouse gas concentrations are driving ocean systems toward conditions not seen for millions of years, with an associated risk of fundamental and irreversible ecological transformation. The impacts of anthropogenic climate change so far include decreased ocean productivity, altered food web dynamics, reduced abundance of habitat-forming species, shifting species distributions, and a greater incidence of disease. Although there is considerable uncertainty about the spatial and temporal details, climate change is clearly and fundamentally altering ocean ecosystems. Further change will continue to create enormous challenges and costs for societies worldwide, particularly those in developing countries.
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              Is Open Access

              The Ectocarpus genome and the independent evolution of multicellularity in brown algae.

              Brown algae (Phaeophyceae) are complex photosynthetic organisms with a very different evolutionary history to green plants, to which they are only distantly related. These seaweeds are the dominant species in rocky coastal ecosystems and they exhibit many interesting adaptations to these, often harsh, environments. Brown algae are also one of only a small number of eukaryotic lineages that have evolved complex multicellularity (Fig. 1). We report the 214 million base pair (Mbp) genome sequence of the filamentous seaweed Ectocarpus siliculosus (Dillwyn) Lyngbye, a model organism for brown algae, closely related to the kelps (Fig. 1). Genome features such as the presence of an extended set of light-harvesting and pigment biosynthesis genes and new metabolic processes such as halide metabolism help explain the ability of this organism to cope with the highly variable tidal environment. The evolution of multicellularity in this lineage is correlated with the presence of a rich array of signal transduction genes. Of particular interest is the presence of a family of receptor kinases, as the independent evolution of related molecules has been linked with the emergence of multicellularity in both the animal and green plant lineages. The Ectocarpus genome sequence represents an important step towards developing this organism as a model species, providing the possibility to combine genomic and genetic approaches to explore these and other aspects of brown algal biology further.
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                Author and article information

                Contributors
                s.egan@unsw.edu.au
                Journal
                Microb Biotechnol
                Microb Biotechnol
                10.1111/(ISSN)1751-7915
                MBT2
                Microbial Biotechnology
                John Wiley and Sons Inc. (Hoboken )
                1751-7915
                13 January 2024
                January 2024
                : 17
                : 1 ( doiID: 10.1111/mbt2.v17.1 )
                : e14397
                Affiliations
                [ 1 ] Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney New South Wales Australia
                Author notes
                [*] [* ] Correspondence

                Suhelen Egan, Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, The University of New South Wales, Sydney, NSW, Australia.

                Email: s.egan@ 123456unsw.edu.au

                Author information
                https://orcid.org/0000-0003-3286-4279
                Article
                MBT214397 MICROBIO-2023-534
                10.1111/1751-7915.14397
                10832532
                38217393
                22818659-56eb-4166-abf0-592872a6bf2f
                © 2024 The Authors. Microbial Biotechnology published by Applied Microbiology International and John Wiley & Sons Ltd.

                This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

                History
                : 22 November 2023
                : 20 December 2023
                Page count
                Figures: 2, Tables: 1, Pages: 9, Words: 6670
                Funding
                Funded by: Gordon and Betty Moore Foundation , doi 10.13039/100000936;
                Award ID: 9329
                Categories
                Opinion
                Opinion
                Custom metadata
                2.0
                January 2024
                Converter:WILEY_ML3GV2_TO_JATSPMC version:6.3.6 mode:remove_FC converted:01.02.2024

                Biotechnology
                Biotechnology

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