Welcome to team the Julie, it’s great to have you.
Welcome to team the Julie, it’s great to have you.
The Ocean & Atmospheric Research program (OAR) of NOAA and Sea Grant just announced the winners of its most recent round of research funding to better understand the consequences of ocean warming and acidification on key marine resources in U.S. Northeast coastal waters. We are happy and proud that our proposed work on the climate sensitivity of Northern sand lance (Ammodytes dubius) was one of the four projects selected for funding. This is particularly good news for Chris Murray, who for his PhD can now expand his experimental rearing expertise to this important species.
This work will be conducted collaboratively with colleagues from NOAA (David Wiley), USGS (Page Valentine), Boston University (Les Kaufman), and Woods Hole Oceanographic Institution (Scott Gallager).
You can read the official announcement as it appeared on 6 September 2016 on NOAA’s News site.
On 6 June 2016, Charlie, Jake and Hannes set course again to the nearby Mumford Cove to retrieve our pH/oxygen/temperature probe (Eureka Manta Sub2) after over six weeks of deployment. Thanks to a newly purchased larger battery-pack that extend the probe-life to more than twice its previous time, the probe continuously recorded conditions every 30 minutes, thereby extending our time series to now over 14 months.
Plus, it was a great, balmy day on the water, and working in the field beats the desk hands down 😉
Check out a selection of the great pics Jake took during the trip below:
This year, Chris presented the results of last years study on long-term changes in growth distributions in Atlantic silversides exposed to high CO2 conditions, whereas Jake presented a poster outlining his thesis research on long-term environmental and biological data collected by Project Oceanology.
Gobler & Baumann’s review provides a good overview over the nascent field of multi-stressor acidification and hypoxia work. A first part firmly establishes that virtually all hypoxic zones in the ocean are also acidified, given that metabolic processes (i.e., respiration) consume oxygen and release CO2 into the environment. In a second part, the sparse emerging evidence for multistressor effects of low pH (high CO2) and low oxygen are reviewed, showing that while the majority of effects are additively negative, every study so far has also found synergistically negative effects of combined stressors in at least one trait.
This invited review was published Open Access.
There is increasing recognition that low dissolved oxygen (DO) and low pH conditions co-occur in many coastal and open ocean environments. Within temperate ecosystems, these conditions not only develop seasonally as temperatures rise and metabolic rates accelerate, but can also display strong diurnal variability, especially in shallow systems where photosynthetic rates ameliorate hypoxia and acidification by day. Despite the widespread, global co-occurrence of low pH and low DO and the likelihood that these conditions may negatively impact marine life, very few studies have actually assessed the extent to which the combination of both stressors elicits additive, synergistic or antagonistic effects in marine organisms. We review the evidence from published factorial experiments that used static and/or fluctuating pH and DO levels to examine different traits (e.g. survival, growth, metabolism), life stages and species across a broad taxonomic spectrum. Additive negative effects of combined low pH and low DO appear to be most common; however, synergistic negative effects have also been observed. Neither the occurrence nor the strength of these synergistic impacts is currently predictable, and there- fore, the true threat of concurrent acidification and hypoxia to marine food webs and fisheries is still not fully understood. Addressing this knowledge gap will require an expansion of multi-stressor approaches in experimental and field studies, and the development of a predictive framework. In consider- ation of marine policy, we note that DO criteria in coastal waters have been developed without consideration of concurrent pH levels. Given the per- sistence of concurrent low pH–low DO conditions in estuaries and the increased mortality experienced by fish and bivalves under concurrent acidifi- cation and hypoxia compared with hypoxia alone, we conclude that such DO criteria may leave coastal fisheries more vulnerable to population reductions than previously anticipated.
We are happy to announce the continued support of the National Science Foundation, Division of Biological Oceanography, which just started to fund our project about multi-stressor effects on the early life stages of fish. This is collaborative work with Prof. Janet Nye’s lab at Stony Brook University, NY, which will strengthen ties between UConn and Stony Brook Marine Sciences. The work has already started and we’re looking forward to new discoveries!
Baumann, H. and Nye, J. 2015. Collaborative research: Understanding the effects of acidification and hypoxia within and across generations in a coastal marine fish. NSF Project# 1536336 (3 years)
Learn more by accessing the NSF-OCE non-technical proposal abstract
By Jacob Snyder:
Chris and I meet up, grab the supplies we need (buckets, bags, coolers, aerators, etcetera), and start making our way to Scituate, Mass. Today we are going out on the NOAA vessel “Auk,” with a few members from NOAA and the USGS. Our goal? To collect approx. 200 Northern Sand Lance, Ammodytes dubius.
We boarded the ship …
Read the whole post and see all the pictures on Jake’s blog @ Red Skies Photography
Check out the footage from the day, thanks to Jake and his GoPro. Check-out the video from the second sampling trip about one month later, too!
Juvenile Pacific bluefin tuna (PBT, Thunnus orientalis) are known to migrate from western Pacific spawning grounds to their eastern Pacific nursery grounds in the California Current Large Marine Ecosystem, but the timing, durations, and fraction of the population that makes these migrations need to be better understood for improved management. This new study published in the ICES Journal of Marine Science suggests that analyzing the trace elemental composition of bluefin tuna otoliths may divulge the time of arrival of the juvenile fish on the Californian Shelf. Scientists from the University of Connecticut, Stony Brook University, Texas A&M, as well as from NOAA collaborated in this effort, hoping to further develop this method to better inform managers in the future.