1,721,484 research outputs found
How biodiversity affects ecosystem functioning:roles of infaunal species richness, identity and density in the marine benthos
No full textABSTRACT: The extent to which changes in biodiversity are causally linked to key ecosystem processes is a primary focus of contemporary ecological research. Highly controlled manipulative experiments have revealed significant and positive effects of increased diversity on ecosystem functioning,but uncertainties in experimental design have made it difficult to determine whether such effects arerelated to the number of species or to effects associated with species identity and density. Usinginfaunal marine invertebrates, we established 2 parallel laboratory experiments to examine thehypothesis that changes in the composition of benthic macrofauna alter the biogeochemistry ofcoastal intertidal mudflats. Our study identified clear effects of increased infaunal species diversityon nutrient generation. However, significant species identity and density effects underpin theobserved response, reflecting species-specific traits associated with bioturbation. Post-hoc examination of our conclusions using power analysis revealed that, given our experimental design, theprobability of finding a correct significant effect, the minimum detectable difference necessary todetect a significant effect, and the minimum number of replicates necessary in order to achieve anacceptable power, all differed between species. Our study has important implications for the designof biodiversity–ecosystem function experiments because the disparity between the contributionsthat individual species make to ecosystem function demands the use of different levels of replicationfor each species within an experiment.<br/
CETUS: Cetacean monitoring surveys in the Eastern North Atlantic
No full textData is provided in the recent OBIS-ENV-DATA format, and comprises 8913 georeferenced positions associated with 3195 occurrences of 44 marine taxa.-- 3 filesThe CETUS dataset contains effort-based occurrence records collected during a cetacean monitoring programme in the Eastern North Atlantic, since 2012This research was partially funded by the EU FEDER/FEMP and Portuguese Foundation for Science and Technology (FCT) under the Portugal2020 (Lisboa2020, Algarve2020 and MAR2020) Programme through project OBSERVA.PT (MAR-01.04.02-FEAMP-0002)Peer reviewe
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