A cost model for ocean iron fertilization as a means of carbon dioxide removal that compares ship- and aerial-based delivery, and estimates verification costs. DOI Creative Commons
David Emerson, Alexander B. Michaud,

Stephen Archer

et al.

EarthArXiv (California Digital Library), Journal Year: 2023, Volume and Issue: unknown

Published: April 14, 2023

This paper presents a cost model for implementing deployment scale effort conducting ocean iron fertilization (OIF) marine-based carbon dioxide removal (CDR). The incorporates basic oceanographic parameters critical estimating the effective export of newly fixed CO2 into biomass that is stimulated by Fe addition to an Fe-limited region Southern Ocean. Estimated costs can vary nearly 100-fold between best-case and worst-case scenarios with values $7/net ton C captured versus $1500/net captured, without accounting verification costs. Primary factors influence are net primary productivity increases achieved via OIF, amount exported deep ocean, ventilated back atmosphere. compares ship-based aerial delivery estimates be 30 – 40% more effective; however, specific requirements require additional research development. also associated environmental monitoring OIF. These increase $/net 3 4-fold. Best, intermediate, worst cases ship $23, $83, $1,735, $25, $94, $4481, respectively, inclusive goal this demonstrate variability in OIF as CDR method, better understand where needed determine major may make tractable, nature-based method.

Language: Английский

Carbon and nitrogen stocks in sediment at Península Valdés Biosphere Reserve: novel insights into the potential contribution of large marine vertebrates to carbon sequestration DOI Creative Commons
Rocío Jiménez–Ramos, Luis G. Egea, Valeria C. D’Agostino

et al.

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: Feb. 14, 2025

Although policymakers and stakeholders are beginning to acknowledge the importance of marine biosphere in blue carbon services, role large vertebrates nitrogen cycle especially sequestration has not yet been fully understood. Large store only a small percentage total oceanic their bodies, but they can provide important lasting contributions flux. The Península Valdés Biosphere Reserve southwestern Argentina was partially established conserve these vertebrates, including South American sea lion ( Otaria flavescens ) southern right whale Eubalaena australis ). Three locations Peninsula were sampling for proximity vertebrate populations area presence salt marshes assess organic (OC) (TN) stocks top 1 m sediment. Our work provides first quantitative data on OC TN sequestered coastal sediments shows that this protected contributes significantly by storing relevant quantities (140 317 Mg ha -1 (7.3 22.9 Specifically, we found terrestrial plants main C sources each sediment core, non-negligible proportion (from 0.8 6.8% dry weight) showed an isotopic signal from usually inhabit area. Therefore, our results novel hypotheses about potential contribution as vector systems may serve basis further investigation into carbon.

Language: Английский

Citations

1
The potential for mangrove and seagrass blue carbon in Small Island States DOI Creative Commons
Daniel A. Friess

Current Opinion in Environmental Sustainability, Journal Year: 2023, Volume and Issue: 64, P. 101324 - 101324

Published: Sept. 4, 2023

Blue carbon is attracting substantial interest as a natural climate solution. Focus has been on countries with large blue stocks, though the high densities of ecosystems make them suitable for Small Island States small coastal habitats. hold 1806–2892 Tg carbon, and mangroves alone offset >10% land use emissions 11 States, highlighting their potential contribution to national change mitigation if they are protected restored. However, <10% have incorporated into National Greenhouse Gas Inventories or Forest Reference Emissions Levels, only 23% quantitative measurable targets, 36% no mention at all. There immense scope implement robust targets actions in many Nationally Determined Contributions Paris Agreement being key policy lever.

Language: Английский

Citations

22
Identifying regime shifts, transients and late warning signals for proactive ecosystem management DOI Creative Commons

Josep Sardanyés,

Filip Ivančić, Blai Vidiella

et al.

Biological Conservation, Journal Year: 2024, Volume and Issue: 290, P. 110433 - 110433

Published: Jan. 14, 2024

Conservation Biology fosters the study of Earth's ecosystems and biodiversity aiming at protecting species their habitats from menaces causing erosion biotic interactions extinctions. Its ultimate goal is to preserve promote sustainable ecological management maintaining both ecosystem's resilience services. Ecosystems display complex patterns in time space due intrinsic nonlinear nature can suffer regime shifts driven by agents global change. During last decades, Ecology has turned equilibrium metaphor paradigm non-equilibrium dynamics. This involves putting into scene multiple stable states, shifts, stochasticity, transients. These aspects are also crucial for biological conservation since they play a fundamental role species' persistence, ecosystems' resilience, detecting warning signals prior either collapse or recovery ecosystem. In this contribution, we discuss caused tipping points real ecosystems. Then, provide information on some known dynamical features theoretical ecology systems theory associated points, mainly given transient phenomena characteristic statistical tied early signals. illustrated with single-species mathematical model including facilitation immigration. We introduce evidence late as way identify when point been surpassed but system still remains state may be possible. Our main near concepts conservationist community bridges between such

Language: Английский

Citations

6
Limited understanding of basic ocean processes is hindering progress in marine carbon dioxide removal DOI Creative Commons
Philip W. Boyd, Jean‐Pierre Gattuso, Catriona L. Hurd

et al.

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(6), P. 061002 - 061002

Published: June 1, 2024

Language: Английский

Citations

6
Marine mammals as indicators of Anthropocene Ocean Health DOI Creative Commons
Stephanie Plön,

K Andra,

L Auditore

et al.

npj Biodiversity, Journal Year: 2024, Volume and Issue: 3(1)

Published: Sept. 10, 2024

The current state of marine mammal populations reflects increasing anthropogenic impacts on the global Ocean. Adopting a holistic approach towards health, incorporating healthy individuals and populations, these taxa present indicators health overall Ocean system. Their deterioration at animal, population ecosystem level has implications for human In Anthropocene, multiple planetary boundaries have already been exceeded, quiet tipping points in may further uncertainties. Long short-term monitoring sense is urgently required to assist evaluating reversing impact Health aid climate change mitigation.

Language: Английский

Citations

5
Biogenic Iron Oxides as a Source of Iron for Ocean Iron Fertilization DOI Open Access
David Emerson, S. Elizabeth George,

A Doiron

et al.

Published: Jan. 6, 2025

Ocean iron fertilization (OIF) is one scenario by which large-scale removal of atmospheric carbon dioxide might be realized. Here we consider how biogenic oxide (BIOX) can used as a potential source for OIF.

Language: Английский

Citations

0
Organic ligands in whale excrement support iron availability and reduce copper toxicity to the surface ocean DOI Creative Commons
Patrick J. Monreal, Matthew S. Savoca, Lydia Babcock‐Adams

et al.

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: Jan. 10, 2025

Language: Английский

Citations

0
Insights into cetacean sightings, abundance, and feeding associations: observations from the boat lift net fishery in the Kaimana important marine mammal area, Indonesia DOI Creative Commons

Mochamad Iqbal Herwata Putra,

Yance Malaiholo,

Achmad Sahri

et al.

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 11

Published: Jan. 10, 2025

A comprehensive understanding of cetacean ecology is crucial for conservation and management. In 2018, Kaimana was identified as an Important Marine Mammal Area (IMMA) due to the regular presence feeding aggregations Australian humpback dolphins ( Sousa sahulensis ), Pacific bottlenose Tursiops aduncus ) Bryde's whales Balaenoptera edeni ). Despite this, information on in region currently lacking. Notably, no surveys have been undertaken since it officially recognized IMMA. We monitored food-provisioning interactions between lift-net fisheries cetaceans from May 2021 March 2023 examine sightings, abundance associations. Five species were positively identified, including a new record Killer Orcinus orca Our findings suggest strong association T. fisheries, where they observed anchovies outside net morning. While other also observed, their less frequent. Furthermore, year-round sightings S. , B. during study period indicate that these are resident this region. results fulfills second IMMA sub-criterion (small populations three species) not previously noted original assessment.

Language: Английский

Citations

0
Intraspecific variation in the feeding habits of short-finned pilot whales based on blubber fatty acid profiles DOI Creative Commons
Eva Íñiguez, Annalisa Sambolino, Alejandro Escánez

et al.

Marine Environmental Research, Journal Year: 2025, Volume and Issue: 204, P. 106974 - 106974

Published: Jan. 22, 2025

Language: Английский

Citations

0
Sustainability in the High Seas and Area Beyond National Jurisdiction: A Global Perspective with a Regional Case Study from the Northeast Atlantic DOI
Francis Neat

Published: Jan. 1, 2025

Language: Английский

Citations

0