Deep-Sea Research Part I-Oceanographic Research Papers最新文献

{"title":"Evidence of vertical stratification in marine environments: insights from passive acoustic monitoring in French Polynesia","authors":"Xavier Raick ,&nbsp;Mélanie Vendrame ,&nbsp;David Lecchini ,&nbsp;Éric Parmentier","doi":"10.1016/j.dsr.2025.104548","DOIUrl":"10.1016/j.dsr.2025.104548","url":null,"abstract":"<div><div>The stratification of species distribution in marine environments is well-documented, reflecting the influence of depth-related factors such as light availability, temperature, pressure, and habitat structure on the organization of marine communities. This study aimed to determine whether this stratification can also be highlighted using Passive Acoustic Monitoring (PAM), a technique proven effective in the study of various marine habitats. Sounds were recorded at 300 m in July 2022 off Moorea Island (French Polynesia) using a SNAP acoustic recorder. These data were compared to both those collected at shallower depths at Moorea Island (20, 60, and 120 m) and to data from other Polynesian islands obtained during a previous, non-concurrent study. Fish sounds in the recordings were manually identified. Richness and abundance of sounds from 20 m to 300 m depth were compared to assess whether fish communities in the altiphotic reef, upper mesophotic reef, lower mesophotic reef, and rariphotic zone could be distinguished based on the sounds they produce. Comparisons between zones over a 24-h period revealed for the first time the existence of acoustic stratification, with a fourfold decrease in species richness, from the altiphotic reef to the rariphotic zone, along with a general decline in sound abundance. However, this general pattern was not uniform in terms of abundance throughout the day, as sound abundance increased with depth at dusk from 950 sounds per hour at 20 m to 3600 at 300 m. It further confirms that diel activity patterns were also evident in light-deprived zones. This first exploration of vertical acoustic stratification based on fish sounds highlights the undeniable contribution of PAM to studies on the ecology of deep-sea communities.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104548"},"PeriodicalIF":2.3,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of the isotope (δ18O, δ2H) composition and salinity of the seawater surface layer in polar regions: Application for the East and European arctic","authors":"E.O. Dubinina,&nbsp;S.A. Kossova,&nbsp;Yu.N. Chizhova,&nbsp;A.S. Avdeenko","doi":"10.1016/j.dsr.2025.104547","DOIUrl":"10.1016/j.dsr.2025.104547","url":null,"abstract":"<div><div>The surface sea water salinity and isotope (δ¹⁸O, δ²H) composition in polar regions are determined by the balance between freshening and freezing-related processes. Due to sea ice formation and its melting, the relation between the salinity and δ¹⁸O(δ²H) values does not correspond entirely to an additive process. We propose the dynamic model of surface layer (DMSL), which considers the fluxes corresponding to the freshening, freezing, and sea ice melting in order to describe the δ¹⁸O(δ²H)–salinity and δ¹⁸O–δ²H relations in Arctic seawater. The DMSL shows that the slope in the δ–salinity space is a complex function of melting and freezing fluxes, freshwater flux, salinity, and isotope composition of marine and freshwater endmembers. The model can be applied to salinity and isotope signatures both for any whole water region and for single water samples. The testing of the DMSL was done for water areas covered with different freezing–melting activity, located both in shelf areas influenced of continental runoff and in areas isolated from it. The data used for test calculations were obtained for surface (0–15 m) seawater collected in the Eastern and European Arctic in 2017, 2018, and 2021 (70°–82.7° N, and −4° W to 168° E) at the end of ice-free seasons. The calculations show that the model is capable of adequately estimating both the isotope signature of fresh water and the ratio of the main fluxes that form the surface layer: freshening, modification, and the contribution from melting sea ice.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104547"},"PeriodicalIF":2.3,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bacterial community characterization and relationship in the gut of deep-sea holothurians and sediment from the Northern Indian Ocean","authors":"Xinlong Li ,&nbsp;Anning Mou ,&nbsp;Yue Dong ,&nbsp;Jing Mo ,&nbsp;Xiaomei Liao ,&nbsp;Xiao Wang ,&nbsp;Zongling Wang ,&nbsp;Xuelei Zhang ,&nbsp;Qinzeng Xu","doi":"10.1016/j.dsr.2025.104546","DOIUrl":"10.1016/j.dsr.2025.104546","url":null,"abstract":"<div><div>Sea cucumbers, widely distributed benthic invertebrates in diverse deep-sea habitats, rely on their gut bacterial communities for essential functions including energy metabolism, biological adaptation, and health. However, the gut bacterial community of deep-sea holothurians in the Indian Ocean remains poorly understood. We used 16S rRNA gene sequencing to characterize bacterial communities in the guts of sea cucumbers and surrounding sediments from two distinct regions of the northern Indian Ocean: the Ninety-East Ridge and the Arabian Sea Basin. This study investigates the composition, diversity, predicted functions, co-occurrence networks, and assembly processes of gut bacterial communities. Alpha diversity of gut bacterial communities did not differ significantly between the two regions. Based on principal coordinate analysis, the bacterial communities of gut formed a distinct cluster from the sediment communities. Actinobacteriota, Proteobacteria, Firmicutes, Chloroflexi, and Bacteroidota were the dominant phyla in both gut and sediment bacterial communities. In the Ninety-East Ridge, the gut microbial network exhibited a higher proportion of positive correlation than the sediment network, suggesting a greater potential for cooperative interactions. Compared to sediment communities, functional predictions indicated that gut communities were enriched in metabolic pathways, including those for amino acid, glycan, vitamin, and lipid metabolism. Stochastic processes were predominant in gut bacterial community assembly, whereas deterministic processes dominated in sediment bacterial communities. This study provides critical insights into the gut microbiota of deep-sea holothurians, advancing our understanding of microbial ecology in extreme marine environments.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104546"},"PeriodicalIF":2.3,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decadal change in deep-ocean dissolved oxygen in the North Atlantic Ocean and North Pacific Ocean","authors":"Henry A. Ruhl ,&nbsp;Christine L. Huffard ,&nbsp;Monique Messié ,&nbsp;Thomas P. Connolly ,&nbsp;Thomas Soltwedel ,&nbsp;Frank Wenzhöfer ,&nbsp;Rodney J. Johnson ,&nbsp;Nicholas R. Bates ,&nbsp;Susan Hartman ,&nbsp;Anita Flohr ,&nbsp;Edward W. Mawji ,&nbsp;David M. Karl ,&nbsp;James Potemra ,&nbsp;Fernando Santiago-Mandujano ,&nbsp;Tetjana Ross ,&nbsp;Kenneth L. Smith","doi":"10.1016/j.dsr.2025.104534","DOIUrl":"10.1016/j.dsr.2025.104534","url":null,"abstract":"<div><div>Declining dissolved oxygen concentrations are documented at upper and mid ocean depths, but less is known about the deep ocean. Long time-series measurements of dissolved oxygen analyzed with Winkler titration over several decades reveal regional differences at six stations in the abyssal North Atlantic Ocean and North Pacific Ocean. A significant decline in dissolved oxygen was evident at two stations in the northeast Pacific Ocean at 4000–4200 m depth (Stations PAPA and M). A similar decreasing but insignificant trend was recorded in the Arctic region of the North Atlantic Ocean (HAUSGARTEN). However, there was no significant decrease in dissolved oxygen at two temperate stations in the North Atlantic Ocean (PAP, BATS) and at one tropical station in the central North Pacific Ocean (ALOHA) all at similar depths &gt;4000 m over similar time periods. Continued long time-series observations will be needed to monitor global deep ocean processes and the impact of changing climate. We compare these rare long-term observations with model estimations from historical (1850–2014) and projected (2015–2100) forcing under a continued high greenhouse gas emission scenario.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104534"},"PeriodicalIF":2.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolutionary affinity of a novel deep-sea coral from the Central Indian Ridge seamount, and its links to Pacific Ocean species","authors":"Rengaiyan Periasamy ,&nbsp;Baban Ingole","doi":"10.1016/j.dsr.2025.104543","DOIUrl":"10.1016/j.dsr.2025.104543","url":null,"abstract":"<div><div>The family Victorgorgiidae Moore et al., 2017 comprises deep-sea gorgonian corals typically characterized by purple colonies and distinctive josephinae clubs in their polyp tentacles. Despite this, the family exhibits low species diversity and the ones from the deep Indian Ocean remain poorly unknown, remarking the need for more research to better understand their ecological role and evolutionary history. A new species, <em>Victorgorgia indica</em> sp. nov., was discovered on a seamount along the Central Indian Ridge (CIR) at depths of 1917–2053 m, representing the first record of Victorgorgiidae in the Indian Ocean. Among the nine known species of <em>Victorgorgia</em> López-González and Briand, 2002), <em>V. indica</em> sp. nov. is morphologically most similar to <em>V. flabellata</em> Li et al., 2020 and <em>V. iocasica</em> Li et al., 2020, particularly in the arrangement of the calyx, which is mainly isolated in three sides of the branches. However, this arrangement can vary in different parts of a colony and may be influenced by local habitat conditions. <em>V. indica</em> sp. nov. differs from these species by having tuberculate rods, a thorn club in the tentacle rachis, and curved rodlets with tall tubercules along their edges in the pinnules. Phylogenetic analysis at the family level using the MutS-like protein (MutS) gene supports Victorgorgiidae as a monophyletic group. The evolutionary relationships of the new CIR species suggest a close affinity with its Pacific Ocean congeners, including <em>V. flabellat</em><em>a</em>, <em>V. iocasica</em> and <em>V. eminens</em> Moore et al., 2017. This points to the CIR seamount system potentially acting as a link for gene flow between the Indian and Pacific Oceans. Analyses of the reproductions of these species showed that <em>V. indica</em> sp. nov. is a brooder, with planula larvae developing within clumped autozooids—the only mature polyps—and settling on dead deep-sea coral. Here we presented also the complete mitochondrial genome of <em>V. indica</em> sp. nov., which is 18,715 base pairs in size, and includes 14 protein-coding genes (PCGs), two ribosomal RNA genes (rrnS and rrnL), and one transfer RNA gene. The gene order of the mitogenome is identical to that of other sequenced Victorgorgiidae species.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104543"},"PeriodicalIF":2.3,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Megafauna of the RMS Titanic shipwreck and a nearby seamount ridge in the deep sea of the western North Atlantic","authors":"Jason Cleland ,&nbsp;Anna Gebruk ,&nbsp;J. Murray Roberts ,&nbsp;Dmitry Aleynik ,&nbsp;Beverly McClenaghan ,&nbsp;Rod Mather ,&nbsp;Bridget Buxton ,&nbsp;Steve W. Ross","doi":"10.1016/j.dsr.2025.104544","DOIUrl":"10.1016/j.dsr.2025.104544","url":null,"abstract":"<div><div>The biology of shipwrecks and hard substrata in the deep sea remains poorly explored. These complex habitats alter biodiversity on the deep seafloor and facilitate connecting populations over large distances. We analysed biological and environmental data collected at the RMS <em>Titanic</em> wreck site (3800 m) and a seamount ridge (2900 m) during the 2022 <em>Titanic</em> Expedition (15 June–25 July). The ridge is part of Seamount U, approximately 40 km southeast of the <em>Titanic,</em> and was explored for the first time on July 23, 2022. We analysed megafaunal occurrence across 920 images of the wreck site and 169 images of the ridge site, from digital video. The most common megafauna overall were Ophiuroidea, <em>Munidopsis</em> sp., Cushion-Encrusting Porifera, <em>Geodia</em> spp., and cold-water corals including Keratoisididae and Pennatuloidea. We describe the patterns in community composition across five benthic habitats, likely controlled by substrate type, local hydrodynamics, and food availability. The ridge yielded a higher number of observed megafauna and higher Shannon diversity (n = 73; H = 2.89) than the wreck (n = 21; H = 1.39). The communities associated with the ridge showed high dissimilarity to those at the wreck. We also explored the temporal variability of biofouling organisms on the <em>Titanic</em> using video from 1986 to 2022. We observed a net increase in <em>Chrysogorgia</em> sp. and <em>Lepidisis</em> sp. coral colonies over time with estimated average linear growth rates of up to 10 mm/yr and linear rusticle extensions of up to 14 mm/yr, raising questions about the wreck's ecological succession as it deteriorates.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104544"},"PeriodicalIF":2.3,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional and microbial insights into the gill symbiosis and metal tolerance of the cold seep mussel Gigantidas haimaensis","authors":"Xuanguang Liang ,&nbsp;Mingmin Du ,&nbsp;Yuxin Qin ,&nbsp;Wenlong Cai ,&nbsp;Junrou Huang ,&nbsp;Genmei Lin ,&nbsp;Jianguo Lu","doi":"10.1016/j.dsr.2025.104545","DOIUrl":"10.1016/j.dsr.2025.104545","url":null,"abstract":"<div><div>Deep-sea cold seeps that discharge fluids rich in methane, hydrogen sulfide, and heavy metals present extreme conditions under which only a few organisms, such as deep-sea mussels, can survive. Deep-sea mussels exploit chemosynthetic energy via symbiotic microorganisms. This study compared environmental sensing and stress responses in different tissues of <em>Gigantidas haimaensis</em> from the Haima cold seep through transcriptome and microbiome sequencing, biochemistry index measurements and metal content assessments to decipher its adaptive mechanisms. Transcriptomic analysis revealed distinct expression patterns among three tissues, with more genes expressed in the gill. Compared to the mantle and adductor muscle, the gill had 2519 and 4508 differentially expressed genes (DEGs), respectively, while 1453 DEGs were identified between the mantle and the adductor muscle. Up-regulated DEGs in the gill were associated with symbiont acquisition, pathogen recognition, pathogen removal, symbiotic substance exchange, and oxidative stress response. Meanwhile, the gill microbiota was dominated by methanotrophic Methylomonaceae (&gt;85 % relative abundance). Of the 13 metals analyzed, Zn, Fe, and Cu exhibited the highest concentrations. Genes associated with distinct metal-binding pathways were expressed in different tissues. The gill also showed heightened antioxidant capacity and metal accumulation, underscoring its role in the stress response. The up-regulated genes in the adductor muscle were related to muscle contraction, while in the mantle, the up-regulated protease inhibitors were linked to humoral immunity. This study demonstrates the gill's crucial functions in symbiont and pathogen regulation as well as metal stress response, thus extending our understanding of the adaptive mechanism of <em>G. haimaensis</em> inhabiting cold seeps.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104545"},"PeriodicalIF":2.3,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of eddy merging in maintaining the quasi-permanent Ulleung Eddy","authors":"Guoqing Han ,&nbsp;Wang Zhu ,&nbsp;Yaofeng Wang ,&nbsp;Xiayan Lin ,&nbsp;Juncheng Xie ,&nbsp;Yu Liu","doi":"10.1016/j.dsr.2025.104542","DOIUrl":"10.1016/j.dsr.2025.104542","url":null,"abstract":"<div><div>Eddy merging plays a crucial role in maintaining the lifetimes of quasi-permanent eddies. This study used satellite observations and 3D reanalysis data to investigate the eddy merging process of a quasi-permanent eddy, known as the Ulleung Eddy, in the Ulleung Basin (UB) of the Sea of Japan. The results showed that the number of cyclonic eddies in the Sea of Japan was greater than that of anticyclonic eddies. However, regarding long-lived eddies (&gt;360 days), which were mostly distributed in UB, the number of anticyclonic eddies was greater than that of cyclonic eddies. The eddy merging process is beneficial for strengthening the Ulleung Eddy and maintaining its quasi-permanent state. Through a case analysis of 3D reanalysis data, considerable instability was observed during the merging of the Ulleung Eddy. During the eddy merging process, energy conversion associated with baroclinic instability is dominant. In particular, 95.8 % of the eddy merging processes exhibited a conversion from mean potential energy to eddy potential energy, whereas 83.3 % of the eddy merging processes demonstrated a conversion from mean kinetic energy to eddy kinetic energy. The merging of the Ulleung Eddy is conducive to its maintenance and development.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104542"},"PeriodicalIF":2.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A video dataset for hadal snailfish along with the benchmark","authors":"Jiushuang Zhang,&nbsp;Yong Wang","doi":"10.1016/j.dsr.2025.104517","DOIUrl":"10.1016/j.dsr.2025.104517","url":null,"abstract":"<div><div>Application of deep learning technology for deep-sea ecological studies is still in its infancy stage especially in the field of automatic taxonomic identification and statistics. In this study, we created a novel dataset containing annotated videos for the rare species of hadal snailfish inhabiting in depth below 6000 meters, and conducted control experiments by combining models of different specifications and adding different attention mechanisms. We successfully generated a set of benchmark test data from a quantitative perspective. In addition, based on out of set data with completely different data distributions from the training and validation sets, the generalization ability of the model trained on the new dataset in real-world scenarios was qualitatively analyzed. Other researchers can continue to expand and supplement the dataset based on our benchmarks, or directly apply our results to actual deep-sea videos collected, and accurately identify and capture deep-sea snailfish in the videos. With this deep learning video processing technology, distribution pattern and biodiversity of the deep-sea organisms will be accomplished efficiently.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"223 ","pages":"Article 104517"},"PeriodicalIF":2.3,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial variation of micrometeorite abundance in global ocean","authors":"V.P. Singh ,&nbsp;N.G. Rudraswami","doi":"10.1016/j.dsr.2025.104533","DOIUrl":"10.1016/j.dsr.2025.104533","url":null,"abstract":"<div><div>Annually, Earth accumulates ∼40,000 tons of cosmic dust, with ∼4000–6000 tons reaching the surface as micrometeorites (MMs). This study analyzes ∼3 tons of wet sediments and ∼5000 MMs from the Central Indian Ocean Basin, using a machine learning algorithm based on terrestrial sedimentation rate (TSR) and MM abundance to identify optimal collection regions. Deep-sea sediments (TSR &lt;0.01 cm/kyr) contain ∼50 MM/kg of dry sediments, yet remain largely unexplored. Moderately deep-sea sediments (0.01 &lt; TSR &lt;0.1 cm/kyr), like those in this study, average ∼15 MM/kg, while shallow-sea sediments yield far fewer. Modelling indicates that ocean regions between 45° N and 45° S latitude are ideal for MM collection. The eastern Pacific Ocean (10-40° N and 10-30° S) and the Central Indian Ocean (0-45° S) are particularly suitable. Apart from deep-sea collection, ancient rocks deposited in calm environments with low TSR (e.g. shale, claystone, mudstone, chert, and limestone) are promising for collecting fossil MMs. Overall, this research enhances micrometeorite collection strategies, enabling more accurate flux estimation and providing a foundation for researchers to effectively target specific ocean areas and ancient rock formations, thereby facilitating investigations into extraterrestrial activities and their impacts on Earth's processes.</div></div>","PeriodicalId":51009,"journal":{"name":"Deep-Sea Research Part I-Oceanographic Research Papers","volume":"222 ","pages":"Article 104533"},"PeriodicalIF":2.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}