File:Details of Antarctic Ice Shelf boreholes that have seafloor images, including those with living organisms.jpg
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[edit]DescriptionDetails of Antarctic Ice Shelf boreholes that have seafloor images, including those with living organisms.jpg |
English: Abstract of the study: "The seafloor beneath floating ice shelves accounts roughly a third of the Antarctic’s 5 million km2 of continental shelf. Prior to this study, our knowledge of these habitats and the life they support was restricted to what has been observed from eight boreholes drilled for geological and glaciological studies. The established theory of sub-ice shelf biogeography is that both functional and taxonomic diversities decrease along a nutrient gradient with distance from the ice shelf front, resulting in a depauperate fauna, dominated by mobile scavengers and predators toward the grounding line. Mobile macro-benthic life and mega-benthic life have been observed as far as 700 km under an ice shelf. New observations from two boreholes in the Filchner-Ronne Ice Shelf challenge the idea that sessile organisms reduce in prevalence the further under the ice you go. The discovery of an established community consisting of only sessile, probably filter feeding, organisms (sponges and other taxa) on a boulder 260 km from the ice front raises significant questions, especially when the local currents suggest that this community is somewhere between 625 km and 1500 km in the direction of water flow from the nearest region of photosynthesis. This new evidence requires us to rethink our ideas with regard to the diversity of community types found under ice shelves, the key factors which control their distribution and their vulnerability to environmental change and ice shelf collapse." |
Date | |
Source | https://www.frontiersin.org/articles/10.3389/fmars.2021.642040/full |
Author | Authors of the study: Huw J. Griffiths, Paul Anker, Katrin Linse, Jamie Maxwell, Alexandra L. Post, Craig Stevens, Slawek Tulaczyk and James A. Smith |
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current | 23:07, 8 March 2021 | 2,815 × 2,465 (1.17 MB) | Prototyperspective (talk | contribs) | Uploaded a work by Authors of the study: Huw J. Griffiths, Paul Anker, Katrin Linse, Jamie Maxwell, Alexandra L. Post, Craig Stevens, Slawek Tulaczyk and James A. Smith from https://www.frontiersin.org/articles/10.3389/fmars.2021.642040/full with UploadWizard |
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Orientation | Normal |
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Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS3 Windows |
File change date and time | 12:43, 3 February 2021 |
Color space | sRGB |
Image width | 2,815 px |
Image height | 2,465 px |
Date and time of digitizing | 18:13, 3 February 2021 |
Date metadata was last modified | 18:13, 3 February 2021 |
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