A vast icefish breeding colony discovered in the Antarctic

Purser, Autun; Hehemann, Laura; Boehringer, Lilian; Tippenhauer, Sandra; Wege, Mia; Bornemann, Horst; Pineda-Metz, Santiago E A; Flintrop, Clara M.; Koch, Florian; Hellmer, Hartmut; Burkhardt‐Holm, Patricia; Janout, Markus; Werner, Ellen M.; Glemser, Barbara; Balaguer, Jenna; Rogge, Andreas; Holtappels, Moritz; Wenzhöfer, Frank

doi:10.1016/j.cub.2021.12.022

Cited by 33 publications

(21 citation statements)

References 49 publications

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“…Continual ecological investigations focused on how notothenioids are utilizing their habitat are needed to place our analyses into a more refined ecological context, as it is currently not possible to accurately contrast patterns of eye size or opsin evolution relative to these aspects of water column niches. Fortunately, continual advances in imaging technology hold the promise of overcoming traditional logistical challenges of observing notothenioids in the Antarctic (Jones and Near 2012; La Mesa et al 2021; Purser et al 2022) and providing these critically needed insights into the ecology of this adaptive radiation in the near future.…”

Section: Discussionmentioning

confidence: 99%

Decoupled spectral tuning and eye size diversification patterns in an Antarctic adaptive radiation

Yoder

Parker

Tew

et al. 2022

Preprint

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Evolutionary transitions in water column usage have played a major role in shaping ray-finned fish diversity. However, the extent to which vision-associated trait complexity and water column usage is coupled remains unclear. Here we investigate the relationship between depth niche, eye size, and the molecular basis of light detection across the Antarctic notothenioid adaptive radiation. Using a phylogenetic comparative framework, we integrate sequence analyses of opsin tuning sites with data on eye size and depth occupancy from over two decades of NOAA trawl-based surveys. We find a consistent signature of changes in tuning sites suggestive of shifts in their ability to detect lower wavelengths of light. These represent repeated instances of independent tuning site changes across the notothenioid phylogeny that are generally not associated with habitat depth or species eye size. We further reveal an acceleration in the rate of eye size diversification nearly 20 million years after the initial radiation that has manifested in high levels of eye size divergence among closely related taxa. Collectively, our results strongly support a decoupling of the diversification dynamics between opsin tuning sites, eye size and depth, providing a new perspective of the evolution of the visual system in this iconic adaptive radiation.

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Section: Discussionmentioning

confidence: 99%

Decoupled spectral tuning and eye size diversification patterns in an Antarctic adaptive radiation

Yoder

Parker

Tew

et al. 2022

Preprint

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“…Researchers only have limited capacities for voluntary science communication besides their normal tasks; hence, media platforms often inform about science topics without directly consulting a researcher from a specific field. Especially in media, but also in research, some topics attract much public attention, such as the possible crossing of a tipping point of the Greenland Ice Sheet (e.g., King et al, 2020) or the finding of a vast fish breeding colony in Antarctica (Purser et al, 2022). While WfW also presents such science, we similarly broadcast research from niche topics.…”

Section: Discussion and Outlookmentioning

confidence: 99%

“Wissenschaft fürs Wohnzimmer” – two years of interactive, scientific livestreams weekly on YouTube

Stoll

Wietz

Juricke

et al. 2022

Preprint

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Science communication is becoming increasingly important to connect academia and society, and to counteract fake news among climate change deniers. Online video platforms, such as YouTube, offer great potential for low-threshold communication of scientific knowledge to the general public. In April 2020 a diverse group of researchers from the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research launched the YouTube channel "Wissenschaft fürs Wohnzimmer" (translated to "Sitting Room Science") to stream scientific talks about climate change and biodiversity every Thursday evening. Here we report on the numbers and diversity of content, viewers, and presenters from 2 years and 100 episodes of weekly livestreams. Presented topics encompass all areas of polar research, social issues related to climate change, and new technologies to deal with the changing world and climate ahead. We show that constant engagement by a group of co-hosts, and presenters from all topics, career stages, and genders enable a continuous growth of views and subscriptions, i.e. impact. After 783 days the channel gained 30,251 views and 828 subscribers and hosted well-known scientists while enabling especially early career researchers to improve their outreach and media skills. We show that interactive and science-related videos, both live and on-demand, within a pleasant atmosphere, can be produced voluntarily while maintaining high quality. We further discuss challenges and possible improvements for the future. Our experiences may help other researchers to conduct meaningful scientific outreach and to push borders of existing formats with the overall aim of developing a better understanding of climate change and our planet.

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“…The data collected during PS124 complement data collected from the same stations or stations in close proximity during Antarctic cruises over the last 2 decades, as a time series survey (i.e. Piepenburg et al, 2017), and represent the first image-based surveys of some areas of the Weddell Sea, such as the area covered by an active Neopagetopsis ionah breeding colony (Purser et al, 2022).…”

Section: Still Image Data Collectionmentioning

confidence: 98%

“…2), deployments PS124_27-1, PS124_26-7, PS124_30-7, PS124_33-4, PS124_54-1, PS124_63-1, PS124_67-1 and PS124_101-1. This region was the most heavily surveyed during PS124, following the discovery of the ice fish breeding colony described in Purser et al (2022) (Fig. 7a).…”

Section: Northern Filchner Troughmentioning

confidence: 99%

The COSMUS expedition: seafloor images and acoustic bathymetric data from the PS124 expedition to the southern Weddell Sea, Antarctica

Purser

Hehemann

Boehringer

et al. 2022

Earth Syst. Sci. Data

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Abstract. Between 3 February and 30 March 2021 the research icebreaker RV Polarstern conducted an extensive multidisciplinary research expedition across the southern Weddell Sea, Antarctica. During the Continental Shelf Multidisciplinary Flux Study (COSMUS) expedition (designated research expedition PS124), the Ocean Floor Observation and Bathymetry System (OFOBS) was deployed 20 times to collect high-resolution seafloor image and acoustic data with a 26-megapixel resolution camera, HD (high-definition) video camera, forward-facing acoustic camera and multibeam side-scan system from heights of between 1.5 and 4.5 m above the seafloor. To localise the collected data, the OFOBS was equipped with a Posidonia transponder for ultra-short baseline position triangulation, an inertial navigation system (INS) and a seafloor-tracking dynamic velocity logger (DVL). The 20 deployments were made across contrasting areas of the Weddell Sea, Filchner Trough, Filchner Sill and Filchner Shelf. Here, we present the full image dataset collected from across the various deployments as well as raw side-scan data and derived high-resolution bathymetric maps produced from these acoustic data after the cruise. All images are available from https://doi.org/10.1594/PANGAEA.936205 (Purser et al., 2021d) and https://doi.org/10.1594/PANGAEA.932827 (Purser et al., 2021a). Acoustic data for all deployments are also available from PANGAEA, with the raw side-scan data available at https://doi.org/10.1594/PANGAEA.939322 (Hehemann et al., 2021b) and forward-facing acoustic camera data at https://doi.org/10.1594/PANGAEA.939341 (Purser et al., 2021c). Seafloor topographic maps derived from the side-scan data are available at https://doi.org/10.1594/PANGAEA.939087 (Hehemann et al., 2021a).

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A vast icefish breeding colony discovered in the Antarctic

Cited by 33 publications

References 49 publications

Decoupled spectral tuning and eye size diversification patterns in an Antarctic adaptive radiation

Decoupled spectral tuning and eye size diversification patterns in an Antarctic adaptive radiation

“Wissenschaft fürs Wohnzimmer” – two years of interactive, scientific livestreams weekly on YouTube

The COSMUS expedition: seafloor images and acoustic bathymetric data from the PS124 expedition to the southern Weddell Sea, Antarctica

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