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| Marzloff, Martin; Oliver, Eric C. J.; Barrett, Neville S.; Holbrook, Neil J.; James, Lainey; Wotherspoon, Simon J.; Johnson, Craig. |
| The effects of climate-driven ocean change on reef habitat-forming species are diverse(1,2) and can be deleterious to the structure and functioning of seafloor communities(3-5). Although responses of shallow coral- or seaweed-based reef communities to environmental changes are a focus of ecological research in the coastal zone(1,4-6), the ecology of habitat-forming organisms on deeper mesophotic reefs remains poorly known. These reefs are typically highly biodiverses(7,8) and productive as a result of massive nutrient recycling(9). Based on seafloor imagery obtained from an autonomous underwater vehicle(8), we related change in community composition on deep reefs (30-90 m) across a latitudinal gradient (25-45 degrees S) in southeastern Australia to... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00461/57268/64187.pdf |
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| Grasso, Florent; Carlier, Antoine; Cugier, Philippe; Verney, Romaric; Marzloff, Martin. |
| In coastal environments, strong feedback can exist between benthic fauna and sediment dynamics. Benthic populations can modify sediment dynamics through biofiltration and bioturbation, while hydro- and sediment dynamics directly determine local environmental conditions for benthic organisms. However, these complex feedbacks are difficult to study in situ. Here, we carried out mesocosm experiments to characterize the effects of a benthic species (the gastropod Crepidula fornicata) on mud dynamics under hydrodynamic conditions representative of their natural habitat. Different experimental tests related to the inclusion (or not) of dead or live crepidula reveal that biofiltration can increase particle settling up to 40%. Flocculation, which is strengthened... |
| Tipo: Text |
Palavras-chave: Laboratory experiments; Coastal processes; Physical-biological interactions; Benthic engineer species; Mud settling; Flocculation; Biofiltration; Organic matter. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00662/77403/79043.pdf |
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| Muller, Alexandre; Poitrimol, Camille; Nunes, Flavia; Boye, Aurelien; Curd, Amelia; Desroy, Nicolas; Firth, Louise B; Bush, Laura; Davies, Andrew J; Lima, Fernando P; Marzloff, Martin; Meneghesso, Claudia; Seabra, Rui; Dubois, Stanislas. |
| Reef-building species are recognized as having an important ecological role and as generally enhancing the diversity of benthic organisms in marine habitats. However, although these ecosystem engineers have a facilitating role for some species, they may exclude or compete with others. The honeycomb worm Sabellaria alveolata (Linnaeus, 1767) is an important foundation species, commonly found from northwest Ireland to northern Mauritania, whose reef structures increase the physical complexity of the marine benthos, supporting high levels of biodiversity. Local patterns and regional differences in taxonomic and functional diversity were examined in honeycomb worm reefs from 10 sites along the northeastern Atlantic to explore variation in diversity across... |
| Tipo: Text |
Palavras-chave: Biodiversity; Taxonomic diversity; Functional diversity; Ecosystem engineer; Reef; Turnover. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00693/80506/83709.pdf |
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| Taormina, Bastien; Marzloff, Martin; Desroy, Nicolas; Caisey, Xavier; Dugornay, Olivier; Metral Thiesse, Emmanuelle; Tancray, Aurelien; Carlier, Antoine. |
| Underwater imagery is increasingly used as an effective and repeatable method to monitor benthic ecosystems. Nevertheless, extracting ecologically relevant information from a large amount of raw images remains a time-consuming and somewhat laborious challenge. Thus, underwater imagery processing needs to strike a compromise between time-efficient image annotation and accuracy in quantifying benthic community composition. Designing and implementing robust image sampling and image annotation protocols are therefore critical to rationally address these trade-offs between ecological accuracy and processing time. The aim of this study was to develop and to optimize a reliable image scoring strategy based on the point count method using imagery data acquired on... |
| Tipo: Text |
Palavras-chave: Benthic monitoring; Fouling community; Sampling design; Taxonomic resolution; Underwater imagery. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00599/71160/69550.pdf |
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| Firth, Louise B; Harris, Daniel; Blaze, Julie A; Marzloff, Martin; Boye, Aurelien; Miller, Peter I; Curd, Amelia; Vasquez, Mickael; Dunn, Julia D; O'Connor, Nessa E; Power, Anne-marie; Mieszkowska, Nova; O’riordan, Ruth M; Burrows, Michael T; Bricheno, Lucy M; Knights, Anthony M; Nunes, Flavia; Bordeyne, François; Bush, Laura E; Byers, James E; David, Carmen; Davies, Andrew J; Dubois, Stanislas; Edwards, Hugh; Foggo, Andy; Grant, Lisa; Mattias Green, Ja; Gribben, Paul E; Lima, Fernado P; Mcgrath, David; Noel, Laure Mlj; Seabra, Rui; Simkanin, Christina; Hawkins, Stephen J. |
| Aim To investigate some of the environmental variables underpinning the past and present distribution of an ecosystem engineer near its poleward range edge. Location >500 locations spanning >7,400 km around Ireland. Methods We collated past and present distribution records on a known climate change indicator, the reef‐forming worm Sabellaria alveolata (Linnaeus, 1767) in a biogeographic boundary region over 182 years (1836–2018). This included repeat sampling of 60 locations in the cooler 1950s and again in the warmer 2000s and 2010s. Using species distribution modelling, we identified some of the environmental drivers that likely underpin S. alveolata distribution towards the leading edge of its biogeographical range in Ireland. Results Through... |
| Tipo: Text |
Palavras-chave: Biogenic habitat; Biogeography; Cold event; Irish Sea; Macroecology; Tidal front. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00677/78938/81316.pdf |
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| Robinson, Lucy M.; Marzloff, Martin; Van Putten, Ingrid; Pecl, Gretta; Jennings, Sarah; Nicol, Sam; Hobday, Alistair J.; Tracey, Sean; Hartmann, Klaas; Haward, Marcus; Frusher, Stewart. |
| Climate-driven changes in ocean currents have facilitated the range extension of the long-spined sea urchin (Centrostephanus rodgersii) from Australia's mainland to eastern Tasmania over recent decades. Since its arrival, destructive grazing by the urchin has led to widespread formation of sea urchin 'barrens'. The loss of habitat, biodiversity and productivity for important commercial reef species in conjunction with the development of an urchin fishery has led to conflicting objectives among stakeholders, which poses complex challenges for regional management. Stakeholder representatives and managers were engaged via a participatory workshop and subsequent one-on-one surveys to trial a structured decision-making process to identify effective... |
| Tipo: Text |
Palavras-chave: Structured decision-making; Decision analysis; Multi-method elicitation; Stakeholder engagement; Ecosystem-based management; Species range extension; Keystone herbivore; Global marine hotspot. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00590/70226/69512.pdf |
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| Androuin, Thibault; Polerecky, Lubos; Decottignies, Priscilla; Dubois, Stanislas; Dupuy, Christine; Hubas, Cedric; Jesus, Bruno; Le Gall, Erwan; Marzloff, Martin; Carlier, Antoine. |
| The slipper limpet Crepidula fornicata is an emblematic invasive species along the northeast Atlantic coast. This gregarious gastropod lives in stacks of several individuals and forms extended beds in shallow subtidal areas. The effects of this engineer species on the colonized habitat can be physical (e.g., presence of hard-shell substrates with uneven topography) or biological (e.g., nutrient enrichment by direct excretion or via biodeposition). We hypothesized that through biological activity, nutrient fluxes at the sediment-water interface are enhanced, leading to stimulated primary productivity by microphytobenthos (MPB) associated with Crepidula beds. To test this fertilization hypothesis, we conducted a 10-day mesocosm experiment using C. fornicata... |
| Tipo: Text |
Palavras-chave: Crepidula fornicata; Engineer species; Subtidal microphytobenthos; Fertilization; Hyperspectral imaging. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00472/58338/60893.pdf |
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| Majdi, Nabil; Hette-tronquart, Nicolas; Auclair, Etienne; Bec, Alexandre; Chouvelon, Tiphaine; Cognie, Bruno; Danger, Michael; Decottignies, Priscilla; Dessier, Aurélie; Desvilettes, Christian; Dubois, Stanislas; Dupuy, Christine; Fritsch, Clémentine; Gaucherel, Cédric; Hedde, Mickaël; Jabot, Franck; Lefebvre, Sebastien; Marzloff, Martin; Pey, Benjamin; Peyrard, Nathalie; Powolny, Thibaut; Sabbadin, Régis; Thébault, Elisa; Perga, Marie-elodie. |
| Trophic ecology is the study of feeding interactions and food acquisition by organisms. It includes the causes and consequences of those behaviours at all levels of biological organisation. As a field of research, it crosses many disciplinary boundaries and provides knowledge that is pertinent to many other areas of ecology. Here we list and categorise the methods available to trophic ecologists whose toolbox has broadened considerably in recent years. They encompass empirical and numerical approaches with focus ranging from molecules to ecosystems. We further examine the relationship of each method to features such as the scale of observation (from microbes to largest organisms) and organisational level (from individuals to ecosystems) as well as the... |
| Tipo: Text |
Palavras-chave: Food web; Feeding interactions; Flux of energy; Computer simulations; Trophic models. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00487/59834/65986.pdf |
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