Asset Details
Do you wish to reserve the book?
Bioturbation in the hadal zone
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Bioturbation in the hadal zone
Do you wish to request the book?
Bioturbation in the hadal zone
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Bioturbation in the hadal zone
2025
Overview
The hadal zone, >6 km deep, remains one of the least understood ecosystems on Earth. We address bioturbational structures in sediment cores from depths exceeding 7.5 km, collected during the IODP Expedition 386 in the Japan Trench. Micro-CT imaging on 20 core sections allowed to identify biogenic sedimentary structures (incipient trace fossils) and their colonization successions within gravity flow deposits. Their frequency, and consequent changes in substrate consistency, oxygenation and organic matter delivery and remineralization controlled the endobenthic colonization. The gravity-flow beds show recurring bioturbation successions: The initial colonization is characterized by deposit-feeding structures such as
Phycosiphon, Nereites
and
Artichnus
generating typically 20 cm thick intensively bioturbated fabrics. The final colonization stage comprises slender spiral, lobate and deeply penetrating straight and ramifying burrow systems such as
Gyrolithes, Pilichnus
and
Trichichnus
, interpreted to include burrows of microbe farming and chemosymbiotic invertebrates. The main factor precluding colonization is soupy substrate. Organic matter degradation and post-event upward expansion of the anoxic zone drive the change from deposit feeding to microbe-dependent feeding strategies.
To better understand bioturbation in the hadal zone, the authors here examine sediment cores collected from depths of more than 7.5 km. They characterise biogenic sedimentary structures, colonization patterns, and their relation to gravity flow events.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 704/172
/ 704/829
/ Animals
/ Biogenic sedimentary structures
/ Cores
/ Fossils
/ Gravity
/ Humanities and Social Sciences
/ Japan
/ Science
