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Data curators play an important role in assessing data quality and take actions that may ultimately lead to better, more valuable data products. This study explores the curation practices of data curators working within US-based data repositories. We performed a survey in January 2021 to benchmark the levels of curation performed by repositories and assess the perceived value and impact of curation on the data sharing process. Our analysis included 95 responses from 59 unique data repositories. Respondents primarily were professionals working within repositories and examined curation performed within a repository setting. A majority 72.6% of respondents reported that data-level curation was performed by their repository and around half reported their repository took steps to ensure interoperability and reproducibility of their repositorys datasets. Curation actions most frequently reported include checking for duplicate files, reviewing documentation, reviewing metadata, minting persistent identifiers, and checking for corrupt/broken files. The most value-add curation action across generalist, institutional, and disciplinary repository respondents was related to reviewing and enhancing documentation. Respondents reported high perceived impact of curation by their repositories on specific data sharing outcomes including usability, findability, understandability, and accessibility of deposited datasets; respondents associated with disciplinary repositories tended to perceive higher impact on most outcomes. Most survey participants strongly agreed that data curation by the repository adds value to the data sharing process and that it outweighs the effort and cost. We found some differences between institutional and disciplinary repositories, both in the reported frequency of specific curation actions as well as the perceived impact of data curation. Interestingly, we also found variation in the perceptions of those working within the same repository regarding the level and frequency of curation actions performed, which exemplifies the complexity of a repository curation work. Our results suggest data curation may be better understood in terms of specific curation actions and outcomes than broadly defined curation levels and that more research is needed to understand the resource implications of performing these activities. We share these results to provide a more nuanced view of curation, and how curation impacts the broader data lifecycle and data sharing behaviors.

This document is a correction notice for an article titled "Seek and you may (not) find: A multi-institutional analysis of where research data are shared." The correction states that the ORCID iDs (unique identifiers for researchers) are missing for several authors, and provides the correct ORCID iDs for each author. Additionally, there is an error in the first bullet of the "How complete are the metadata records associated with these datasets?" subsection of the Results, which is corrected in the notice. The authors of the article are Lisa R. Johnston, Alicia Hofelich Mohr, Joel Herndon, Shawna Taylor, Jake R. Carlson, Lizhao Ge, Jennifer Moore, Jonathan Petters, Wendy Kozlowski, and Cynthia Hudson Vitale. [Extracted from the article]

INTRODUCTION Data curation may be an emerging service for academic libraries, but researchers actively "curate" their data in a number of ways-even if terminology may not always align. Building on past userneeds assessments performed via survey and focus groups, the authors sought direct input from researchers on the importance and utilization of specific data curation activities. METHODS Between October 21, 2016, and November 18, 2016, the study team held focus groups with 91 participants at six different academic institutions to determine which data curation activities were most important to researchers, which activities were currently underway for their data, and how satisfied they were with the results. RESULTS Researchers are actively engaged in a variety of data curation activities, and while they considered most data curation activities to be highly important, a majority of the sample reported dissatisfaction with the current state of data curation at their institution. DISCUSSION Our findings demonstrate specific gaps and opportunities for academic libraries to focus their data curation services to more effectively meet researcher needs. CONCLUSION Research libraries stand to benefit their users by emphasizing, investing in, and/or heavily promoting the highly valued services that may not currently be in use by many researchers. [ABSTRACT FROM AUTHOR]

Assesses the predominance of cryptomonads and diatoms in the coastal waters of the Antarctic Peninsula. Association of cryptomonads and diatoms with phytoplankton; Results of observation of primary productivity in the coastal waters; Identification of the pigment composition of phytoplankton; Characteristics cryptomonads.

Assesses the temporal variability of transparent exopolymer particles in Antarctic Peninsula during the growth season from 1994 to 1995. Importance of transparent exopolymer particles to bacteria; Measurement of the concentration of the exopolymer particles; Correlation of the concentrations of the particles with the presence of chlorophyll.

Examines the spatial and temporal variability in primary production of phytoplankton in the Antarctic Peninsula during the growth season from 1994 to 1995. Methods used by researchers in taking water samples from the Ocean; Use of neutral nickel screen for evaluating light levels in the Peninsula; Analysis of factors influencing the production of the organism.