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Ghent University Academic Bibliography2000-01-01T00:00+00:001monthlyUnderstanding the impact of sand extraction on benthic ecosystem functioning : a combination of functional indices and biological trait analysis
https://biblio.ugent.be/publication/01HM8WK5F3GPRP5M9VD4JZF40M
Goedefroo, NanouBraeckman, UlrikeHostens, KrisVanaverbeke, JanMoens, TomDe Backer, Annelies2023Marine aggregates have been intensively extracted in the North-East Atlantic over the past decades. This study aimed to assess the effect of sand extraction on benthic ecosystem functioning using a combination of biological traits and functional indices (the bioturbation (BPc) and irrigation potential (IPc) and secondary production (SPc) of the macrobenthic community). Data on macrobenthos, sediment properties and extraction intensity were collected over a time period of ten years (2010 - 2019) for three coarse sediment extraction areas in the Belgian Part of the North Sea, each with a different extraction regime. Sediment parameters such as the medium sand fraction (250 - 500 mu m) and median grain size showed a significant effect on all functional indices. Whilst sand extraction variables only significantly affected secondary production estimates. The secondary production of the macrobenthic community decreased following a high yearly extraction intensity, whereas a high cumulative (10-year period) extraction intensity resulted in a slightly increased secondary production. Species-specific responses revealed that these high cumulative extraction volumes increased the abundance of opportunistic species, which could have contributed to the higher SPc values observed in cumulative disturbed areas. Response traits such as tube-living and sessile individuals with a pelagic egg development were positively influenced by a long-term disturbance, an indication of a more disturbance-tolerant community. A short-term disturbance rather seemed to favor a macrobenthic community characterized by a higher burrowing capability. In terms of effect traits, both short- and long-term extraction clearly favored deposit feeders, which can structure organic matter distribution and thus indirectly influence nutrient and oxygen fluxes as well. Future in situ measurements in sand extraction areas could help to unravel and strengthen our understanding of the ecosystem processes linked to these trait-based observations.application/pdfhttps://biblio.ugent.be/publication/01HM8WK5F3GPRP5M9VD4JZF40Mhttp://hdl.handle.net/1854/LU-01HM8WK5F3GPRP5M9VD4JZF40Mhttp://doi.org/10.3389/fmars.2023.1268999https://biblio.ugent.be/publication/01HM8WK5F3GPRP5M9VD4JZF40M/file/01HM8WNP8P3FWKYV5X6K37CFWMengCreative Commons Attribution 4.0 International Public License (CC-BY 4.0)info:eu-repo/semantics/openAccessFRONTIERS IN MARINE SCIENCEISSN: 2296-7745Biology and Life SciencesOcean EngineeringWater Science and TechnologyAquatic ScienceGlobal and Planetary ChangeOceanographymarine aggregate extractionecosystem functioningmacrobenthosenvironmental impactproxiesMARINE AGGREGATE EXTRACTIONEASTERN ENGLISH-CHANNELSECONDARY PRODUCTIONENVIRONMENTAL-CONDITIONSMACROFAUNAL COMMUNITYPHYSICAL DISTURBANCESEDIMENT COMPOSITIONSPECIES TRAITSDREDGING SITENORTH-SEAUnderstanding the impact of sand extraction on benthic ecosystem functioning : a combination of functional indices and biological trait analysisjournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion