Ocean Twilight Zone Publications and Reports

Publications

2022

The economic tradeoffs and ecological impacts associated with a potential mesopelagic fishery in the California Current

Sally Dowd, Melissa Chapman, Laura E. Koehn, Porter Hoagland. Published February 2022 in Ecological Applications.

Improved biodiversity detection using a large-volume environmental DNA sampler with in situ filtration and implications for marine eDNA sampling strategies

Annette F. Govindarajan, Luke McCartin, Allan Adams, Elizabeth Allan, Abhimanyu Belani, Rene Francolini, Justin Fujii, Daniel Gomez-Ibañez, Amy Kukulya, Fredrick Marin, Kaitlyn Tradd, Dana R. Yoerger, Jill M. McDermott, Santiago Herrera. Published January 2022 as pre-print on bioRxiv.

2021

Computationally efficient processing of in situ underwater digital holograms

Emma Cotter, Erin Fischell, Andone Lavery. Published June 2021 in Limnology and Oceanography.

The Functional and Ecological Significance of Deep Diving by Large Marine Predators

Camrin Braun,Martin Arostegui, Simon Thorrold, Yannis Papastamatiou, Peter Gaube, Jorge Fontes, and Pedro Afonso. Published August 2021 in the Annual Review of Marine Science

An operational overview of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Northeast Pacific field deployment

Siegel, D., et al including Buesseler, K.O. Published July 2021 in Elementa: Science of the Anthropocene.

Review of the analysis of 234Th in small volume (2 - 4 L) seawater samples: improvements and recommendations.

Clevenger, S., Benitez-Nelson, C., Drysdale, J., Pike, S., Puigcorbe, V., Buesseler, K. Published June 2021 in the Journal of Radioanalytical and Nuclear Chemistry.

Biogenic sinking particle fluxes and sediment trap collection efficiency at Ocean Station Papa

Estapa, M., Buesseler, K., Durkin, C.A., Omand, M., Benitez-Nelson, C.R., Roca-Marti, M., Breves, E., Kelly R.P., Pike, S. Published June 2021 in Elementa: Science of the Anthropocene.

Classification of broadband target spectra in the mesopelagic using physics-informed machine learning

Emma Cotter, Christopher Bassett, and Andone Lavery. Published June 2021 in The Journal of the Acoustical Society of America.

Mesobot: A hybrid underwater robot for multidisciplinary investigation of the ocean twilight zone

Yoerger, D. R., Govindarajan, A. F., Howland, J., Llopiz, J. K., Wiebe, P. H., Curran, M., Fujii, J., Gomez-Ibanez, D., Katija, K., Robison, B. H., Hobson, B. W., Risi, M., & Rock, S. M. Published June 2021 in Science Robotics.

Twilight Zone Observation Network: A Distributed Observation Network for Sustained, Real-Time Interrogation of the Ocean’s Twilight Zone

Simon Thorrold, Allan Adams, Ann Bucklin , Ken Buesseler, Godi Fischer, Annette Govindarajan, Porter Hoagland, Di Jin, Andone Lavery, Joel Llopez, Larry Madin, Melissa Omand, Heidi Sosik, Peter Wiebe, Dana Yoerger, and Weifeng (Gordon) Zhang. Published May 2021 in Marine Technology Society Journal.

Comparison of mesopelagic organism abundance estimates using in situ target strength measurements and echo-counting techniques

Emma Cotter, Christopher Bassett, and Andone Lavery. Published April 2021 in JASA Express Letters.

Exploring the use of environmental DNA (eDNA) to detect animal taxa in the mesopelagic zone

Annette F. Govindarajan, Rene D. Francolini, J. Michael Jech, Andone C. Lavery, Joel K. Llopiz, Peter H. Wiebe, and Weifeng (Gordon) Zhang. Published March 2021 in Frontiers in Ecology and Evolution.

The Ocean Twilight Zone's Role in Climate

Ken Buesseler, Di Jin, Melina Kourantidou, David Levin, Kilaparti Ramakrishna, Philip Renaud. Published February 2021.

Growth and reproduction in mesopelagic fishes: a literature synthesis

2020

High resolution spatial and temporal measurements of particulate organic carbon flux using thorium-234 in the northeast Pacific Ocean during the EXPORTS field campaign.

Buesseler, K.O., Benitez-Nelson, C.R., Roca-Marti, M., Wyatt, A.M., Resplandy, L., Clevenger, S.J., Drysdale, J.A., Estapa, M.L., Pike, S., Umhau, B.P. Published December 2020 in Elementa: Science of the Anthropocene.

The value of scientific research on the ocean's biological carbon pump

Di Jin, Porter Hoagland, and Ken Buesseler. Published December 2020 in Science of The Total Environment.

Marine animal tracking with classical and emerging localization algorithms

Dana Yoerger. Published November 2020 in Science Robotics.

Environmental DNA shedding and decay rates from diverse animal forms and thermal regimes

Elizabeth Andruszkiewicz Allan, Weifeng Gordon Zhang, Andone Lavery, Annette Govindarajan. Published September, 2020 in Environmental DNA.

Automatic Classification of Biological Targets in a Tidal Channel Using a Multibeam Sonar

Emma Cotter and Brian Polagye. Published August 2020 in the Journal of Atmospheric and Oceanic Technology.

Frequency- and depth- dependent target strength measurements of individual mesopelagic scatterers

Christopher Bassett, Andone C. Lavery, Timothy K. Stanton, and Emma DeWitt Cotter. Published August, 2020 in The Journal of the Acoustical Society of America.

Metrics that matter for assessing the ocean biological carbon pump

Ken O. Buesseler, Philip W. Boyd, Erin E. Black, and David A. Siegel. Published May 2020 in PNAS.

The oceans’ twilight zone must be studied now, before it is too late

Adrian Martin, Philip Boyd, Ken Buesseler, Ivona Cetinic, Hervé Claustre, Sari Giering, Stephanie Henson, Xabier Irigoien, Iris Kriest, Laurent Memery, Carol Robinson, Grace Saba, Richard Sanders, David Siegel, María Villa-Alfageme & Lionel Guidi. Published March 2020 in Nature. 

2019

Mesoscale eddies release pelagic sharks from thermal constraints to foraging in the ocean twilight zone

Camrin D. Braun, Peter Gaube, Tane H. Sinclair-Taylor, Gregory B. Skomal, and Simon R. Thorrold. Published August 2019 in PNAS.

Value Beyond View: Illuminating the Human Benefits of the Ocean Twilight Zone

Hoagland, Porter; Jin, Di; Holland, Michael; Kostel, Ken; Taylor, Eric; Renier, Natalie; Holmes, Mark. Published January 2019.

Annual Reports

2021 Ocean Twilight Zone Annual Report

The Ocean Twilight Zone Project team has met the “new normal” of COVID-era research with remarkable creativity, pressing forward with innovative scientific work and a major public engagement campaign while prioritizing the safety and health of staff, students, and colleagues.

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2020 Ocean Twilight Zone Annual Report

In the first two years of the Ocean Twilight Zone project, we formed a core, multi-disciplinary team of 12 scientists and developed an integrated work plan aligned with the project’s phase one theme: “initiate, accelerate, and engage.”

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2019 Ocean Twilight Zone Annual Report

We have embarked on a bold new journey to explore one of our planet’s final frontiers—the ocean twilight zone, a vast, remote part of the ocean teeming with life, which remains shrouded in mystery.

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Quarterly Reports