20.500.12556/RUL-152573 Impact of submarine karst sulfur springs on benthic foraminiferal assemblage in sediment of northern Adriatic Sea Purpose This work highlights the sedimentary characteristics and the role of submarine sulfur-rich karstic springs in the distribution of benthic foraminifera in the northern part of the Adriatic Sea (Bay of Koper). Little is known about how local conditions such as temperature and sulfur bursts may influence sediment properties, benthic habitat variability, and composition of foraminiferal assemblages. Here we compare the distribution of total and living benthic assemblages in surface sediment samples collected from a funnel-shaped depression created by submarine sulfur springs. Materials and methods Sampling was performed at water depths between 24.6 and 32.2 m in fine-grained sandy silt to silty sand (partially washed). Sedimentological, mineralogical, and geochemical analyses of the sediment were carried out and the distribution of benthic foraminifera living around the springs was studied. Results and discussion In general, sediment characteristics (i.e., mineralogical, geochemical, and organic content) around the sulfur springs do not show prominent deviations from the marine surface sediment of the area; however, some differences exist among depressions of different depths. Deeper depressions in the lower parts probably extend to older continental sediments of Late Pleistocene age with alluvial features, while shallower depressions were formed entirely in Holocene marine sediments typical of a wider area. Only one of the five samples (M05) contained living foraminifera in sufficient abundance for biocenosis research. The benthic foraminiferal assemblages of moderate diversity are composed of opportunistic species. Elphidium translucens, Ammonia ex gr. tepida, Haynesina depressula, and Porosononion granosum dominate, while A. neobeccarii, Reussella spinulosa, and Textularia bocki are subordinate. Conclusions The distribution and diversity of foraminifera in the sediment near sulfur springs can be explained by several factors and their interactions. The intensity of the spring discharge affects the mixing/oxygenation of the sediment, the shape of spring depressions, and the granulometry of the coarser sediment around the springs. Sediment characteristics indicate different types of sediment origin. This is related to and can be explained by the depth of spring depressions. marine sediments benthic foraminifera mineralogy and geochemistry organic matter submarine sulfur spring Northern Adriatic true false true Angleški jezik Ni določen Članek v reviji 2023-11-29 09:55:48 2023-11-29 09:55:49 2023-11-30 03:42:10 0000-00-00 00:00:00 2023 0 0 Str. 4132–4148 iss. 12 Vol. 23 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 55 1439-0108 10.1007/s11368-023-03614-8 163177475 s11368-023-03614-8.pdf s11368-023-03614-8.pdf 1 8F4EAAD0892DA42B6BD60C5085344D8C 5ba3ed02ac1fdece7597e55ce345eee5207a7e285a4b3e3bc92806e8e768b47f 53097db7-8e95-11ee-9c6c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178118 https://link.springer.com/article/10.1007/s11368-023-03614-8 0 3a1a3b5d-8e95-11ee-9c6c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178117 Naravoslovnotehniška fakulteta 0 0 0