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  • 1
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    International Phycological Society
    In:  Phycologia, 52 (4, Supplement). p. 119.
    Publication Date: 2019-09-23
    Description: To evaluate the importance of anti-herbivore resistance for algal invasion success we compared resistance traits among specimens of the red macroalga Gracilaria vermiculophylla from six native populations in Korea and China and eight invasive populations in Europe and Mexico that were maintained under identical conditions in the laboratory. Herbivorous snails both from the native range (Littorina brevicula) and from the invaded range (Littorina littorea) consumed significantly less of seaweed specimens originating from non-native populations. Metabolome profiling revealed that this preference was correlated with an increased woundactivated production of deterring prostaglandins and hydroxyeicosatetraenoic acids. Thus, invasive populations of G. vermiculophylla are more strongly defended against challenge by herbivores and other biological enemies that cause local tissue or cell disruption and activate oxylipin production. Anthropogenic distribution of genotypes adapted to resist elevated feeding pressure probably contributed to the invasion success of this species.
    Type: Article , PeerReviewed
    Format: text
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  • 2
    Publication Date: 2019-09-23
    Description: Grazing by the isopod Idotea baltica induces chemical defenses in the brown seaweed Fucus vesiculosus. A combination of a 33 day induction experiment, feeding choice assays and functional genomic analyses was used to investigate temporal defense patterns and to correlate changes in palatability to changes in gene expression. Despite permanent grazing, seaweed palatability varied over time. Controls were significantly more consumed than grazed pieces only after 18 and 27 days of grazing. Relative to controls, 562/402 genes were up-/down-regulated in seaweed pieces that were grazed for 18 days, i.e. when defense induction was detected. Reprogramming of the regulative expression orchestra (translation, transcription), up-regulation of genes involved in lipid and carbohydrate metabolism, intracellular trafficking, defense and stress response, as well as downregulation of photosynthesis was found in grazed seaweed. These findings indicate short-term temporal variation in defenses and that modified gene expression patterns arise at the same time when grazed seaweed pieces show reduced palatability. Several genes with putative defensive functions and cellular processes potentially involved in defence, such as reallocation of resources from primary to secondary metabolism, were revealed
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    DCE – Danish Centre for Environment and Energy, Aarhus Univ.
    Publication Date: 2020-02-12
    Description: This book is about management of arctic and northern alpine research stations. It has been produced by a group of station managers participating in the EU 7th Framework Programme Infrastructure project called INTERACT. With this book we want to share the knowledge and experiences we have gained from managing very different research stations in very different environmental and climatic settings. The target audience for the book is mainly managers of research stations in arctic and alpine areas, but we hope that it will also be useful for others involved in science coordination and logistics, e.g. research institutions, chief scientists and expedition planners. The book has been produced mainly based on input from practising station managers being part of ‘INTERACT Station Managers’ Forum (SMF), a forum established to provide a platform for exchange of information between station managers and other participants within INTERACT, and to collect and disseminate knowledge embedded within the network. The scope of this book is to identify and describe best practices and key considerations of relevance to station management under arctic and alpine conditions. As research stations operate under very different legal regimes, financial conditions, environmental and climatic conditions, as well as remoteness, it is not possible to identify specific best practices that fit all stations. Instead, we have described key issues that should be considered and addressed by station management, and supplemented this with examples of good practices from stations operating under different conditions (e.g. different climate, remoteness or size).
    Language: English
    Type: info:eu-repo/semantics/book
    Format: application/pdf
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