Prof Tim Ravasi and Dr Davide Spatafora present their research on how the molecular basis and behavioural adjustments reveal potential local adaptation to acidifying oceans, a lesson from natural analogues, the second webinar from the International CO2 Natural Analogues (ICONA) Network. The first response by animals to a changing environment is predominantly through modification of their behaviour. In this context, investigating behavioural responses of fish living under low-pH/high-CO2 conditions (e.g. off volcanic seep sites) may contribute to a better understanding of how marine species might adjust or adapt to environmental conditions under projected ocean change scenarios. We carried out field-based observations and translocation experiments in the Vulcano island natural CO2 seep (southern Italy) to assess whether there is evidence for local behavioural adaptation and/or acclimatization of fish after long and short-term exposure to ocean acidification conditions predicted to occur by the end of this century. The responses of two temperate fish species, characterized by a limited home range, have been investigated and compared between fish from low-pH/high pCO2 sites and fish from control sites. Furthermore, understanding the molecular underpinnings responsible for acclimatization to acidified waters, by means of an integrated study of the brain transcriptional program of wild fish species, can elucidate on the variation in responses. We collected 130 individuals of six different reef fish species from a natural volcanic CO2 seep and nearby control reefs in Papua New Guinea. Differences in brain gene expression in fish from CO2 seeps compared to fish from control sites as well as differences among species identified the molecular pathways controlling the cellular responses to elevated CO2. These studies provide a broader understanding as to the behavioural and molecular alterations crucial for coping with naturally elevated CO2 conditions.
Continue reading ‘Behavioural responses of fish to high CO2/low pH conditions observed at natural analogues (video & text)’Posts Tagged 'webinar recording'
Behavioural responses of fish to high CO2/low pH conditions observed at natural analogues (video & text)
Published 4 November 2022 Presentations , Resources ClosedTags: resource, video, video/audio, webinar recording
GOA-ON webinar: natural analogues and the future of coral communities and their biodiversity (audio & video)
Published 22 July 2022 Presentations , Resources ClosedTags: resource, video/audio, webinar recording
On 21 July 2022, Dr. Sylvain Agostini and Dr. James D. Reimer from the International CO2 Natural Analogues (ICONA) Network joined the GOA-ON webinar series to discuss “What natural analogues can teach us about the future of coral communities and their understudied biodiversity.” The talk highlighted natural analogue research focusing on the effects on and resilience of both scleractinian corals and zoantharians to understand adaptation mechanisms that will determine the shape and diversity of future coral communities. ICONA will join the GOA-ON webinar series again in the coming months to discuss natural analogues and fish communities.
Continue reading ‘GOA-ON webinar: natural analogues and the future of coral communities and their biodiversity (audio & video)’SOLAS seminar II: atmospheric deposition and ocean biogeochemistry (video)
Published 13 July 2022 Presentations , Resources ClosedTags: resource, webinar recording
The 2nd seminar of the series will focus on “Atmospheric deposition and ocean biogeochemistry: in situ observation, processes studies and modeling approach”. The seminar was hosted by the Laboratoire d’Océanographie de Villefranche, Centre National de la Recherche Scientifique & Sorbonne University, France.
Continue reading ‘SOLAS seminar II: atmospheric deposition and ocean biogeochemistry (video)’Leveraging ocean science and innovation for healthy and resilient coastal and marine ecosystems (video)
Published 8 July 2022 Presentations ClosedTags: resource, webinar recording
HLPF Side Event: “Leveraging ocean science and innovation for healthy and resilient coastal and marine ecosystems” – 06.07.2022
Working across the linkages of SDGs 14, 13 and 15, the side event organized around multi-stakeholder panels explored how investment and partnerships in research, ocean observations, fit-for-purpose data products and services can empower decision-makers, industry and local communities to conserve and restore ocean ecosystems, address vulnerability and build resilience to climate change.
The event provided an overview of key progress, challenges and opportunities in implementing SDG 14, with a specific focus on ocean acidification and marine scientific capacity applied to ocean management, two targets under IOC-UNESCO’s custodianship. Building on the transformative work of UN Decade of Ocean Science for Sustainable Development, innovation in ocean observation, technologies and information delivery to support sustainable use and ocean conservation will be highlighted.
The event also focused on empowering local communities to build resilience and protect biodiversity through partnerships in nature-based solutions such as the biosphere reserves and blue carbon approaches.
…
Continue reading ‘Leveraging ocean science and innovation for healthy and resilient coastal and marine ecosystems (video)’GO2NE webinar: interactive hypoxia-acidification in coastal waters responds to ocean warming
Published 6 July 2022 Presentations , Resources ClosedTags: resource, webinar recording
This is the 13th edition of the Global Ocean Oxygen Network (IOC Expert Working Group GO2NE) webinar series, which took place 21 June 2022.
The speakers present the latest science on the impacts of reduced oxygen in the open ocean and coastal zones. Each webinar features two presentations by a more senior and an earlier-career scientist, 20 minutes each followed by 10 minutes moderated discussion sessions.
Moderator: Guizhi Wang, Xiamen University, China
Speakers
- Yangyang Zhao, Xiamen University, China Interactive hypoxia-acidification in coastal waters responds to ocean warming
- Esther Portela, University of Tasmania, Australia Physical mechanisms driving oxygen uptake by the ocean interior
Stressors of the Arctic Ocean ecosystems: improved understanding of primary production and ocean acidification
Published 19 August 2021 Presentations ClosedTags: resource, video/audio, webinar recording
The Arctic Ocean is changing faster than any other ocean region in the world. Uptake of anthropogenic carbon, amplified warming, sea ice reduction, coastal erosion, and enhanced riverine runoff are driving important changes in the Arctic Ocean ecosystems through changes in primary production and ocean acidification. However, the current understanding of primary production and ocean acidification in the Arctic remains highly uncertain. Furthermore, projections of both processes by Earth-System Models diverge strongly in this region.
During this webinar, Dr. Terhaar presented:
(1) a modelling study that quantifies the impact of terrigenous nutrients from rivers and coastal erosions on Arctic Ocean primary production, a process that was (wrongly?) neglected so far, and
(2) results from two studies on emergent constraint on ocean acidification in the Arctic Ocean that suggests that projections of Earth-System Models collectively underestimated the extent of future ocean acidification in the Arctic Ocean.
Continue reading ‘Stressors of the Arctic Ocean ecosystems: improved understanding of primary production and ocean acidification’Lunch & learn series – Ocean acidification in the Gulf of Maine: issue and solutions (text & video)
Published 18 August 2021 Presentations ClosedTags: resource, video/audio, webinar recording
We hope you enjoy this hour-long panel discussion on ocean and coastal acidification’s impact on scallops and softshell clams, methods of remediation, and future projections for the Gulf of Maine.
The talk was moderated by Dr. Libby Jewett, Director of the NOAA Ocean Acidification Program.
Panelists included, Dr. Samantha Siedlecki, University of Connecticut; Dr. Nichole Price, Bigelow Laboratory for Ocean Sciences; and Dr. Robert J Holmberg, Downeast Institute.
Continue reading ‘Lunch & learn series – Ocean acidification in the Gulf of Maine: issue and solutions (text & video)’GOA-ON Webinar Series 2021: response of the Sydney rock oyster microbiome to rapidly warming and acidifying Australian estuaries (text & video)
Published 17 August 2021 Presentations ClosedTags: resource, video/audio, webinar recording
Webinar speaker: Dr. Elliot Scanes, Chancellor’s Research Fellow, Climate Change Cluster, The University of Technology, Sydney, Australia
Description:
Climate change is impacting ecosystems and organisms worldwide. Estuaries are diverse and important aquatic ecosystems; and yet until now we have lacked information on the response of estuaries to climate change. In this seminar I will present data from a twelve-year monitoring program, involving 6200 observations of 166 estuaries along ~1100 kilometers of the Australian coastline. Estuary temperatures increased by 2.16 C on average over 12 years, at a rate of 0.2 C/year, with waters acidifying at a rate of 0.09 pH units and freshening at 0.086 PSU/year. Lagoons and rivers are warming and acidifying at the fastest rate because of shallow average depths and limited oceanic exchange. The changes measured are an order of magnitude faster than predicted by global ocean and atmospheric models, indicating that existing global models may not be useful to predict change in estuaries. Estuaries are also home to diverse ecosystems and valuable economies supported by oysters. Oysters rely on bacterial communities forming a microbiome for their health and survival. Oysters are also vulnerable to disease and this is may be exacerbated by climate change in estuaries. We found that warming and acidification can shift the microbiome of Sydney rock oysters (Saccostrea glomerata), however, these effects can be ameliorated by selective breeding. We show that oyster genetic background may influence the microbiome under climate change and that future assisted evolution breeding programs could be used to enhance resilience in the oyster microbiome.
The GOA-ON webinar series has four sponsoring organizations:
(1) GOA-ON, the Global Ocean Acidification Observing Network,
(2) NOAA, the United States National Oceanic & Atmospheric Administration,
(3) IAEA OA-ICC, the International Atomic Energy Agency – Ocean Acidification International Coordination Centre, and
(4) IOC-UNESCO – the Intergovernmental Oceanographic Commission of the United Nations Educational, Scientific and Cultural Organization
Continue reading ‘GOA-ON Webinar Series 2021: response of the Sydney rock oyster microbiome to rapidly warming and acidifying Australian estuaries (text & video)’2021 Ocean acidification and hypoxia RFP informational webinar (video)
Published 6 August 2021 Meetings , Presentations ClosedTags: resource, video, webinar recording
Sea Grant California, 6 August 2021. Video.