I’m a little behind but here are the results from the last Neuse run on 9 July. It’s crazy how things have changed since spring when the estuary was basically a river. Salinities in the bottom waters of the lower estuary are as high as I remember seeing. The only other time that bottom waters at 180 have been this high was on 5 Oct 2002. Neuse river flows do not indicate that we are in as significant of a drought as in 2002. So, I think something on the ocean-side of the estuary might be playing a role in the high salinities and plan to see what our physical oceanographers think. The estuary was strongly stratified from New Bern to the mouth. Bottom waters were anoxic along much of the transect as evidenced by a strong sulfide smell. The crew will be out again next week.
Resurgent algal blooms in Chowan River, Edenton Bay, Albemarle Sound and Little River. Read the article by Emily Davis in the NC Health News featuring Dr. Hans Paerl and Dr. Nathan Hall below
Uncharted Waters Ahead for Albemarle’s Returning Algae Blooms
Greetings from Gibraltar Island, Ohio State Univ. Lab, out in Lake Erie, where we’re getting our first bioassay set up with Maumee Bay and Sandusky Bay water… Great weather here after a set of T-storms came through last nite. Hopefully good weather this week.
Cheers, Karen, Haley, Malcolm and Hans
XuHai and Hans are cookin up some “cyano soup”.
Collected Taihu stations today and was amazed at how buoyant the cyanos (mostly Microcystis) are right now. Within 30 seconds they went from a shaken suspended state to surface scum formation. Have a look.
Hey folks: Here’s some real bloom dynamics at Taihu. No photoshop stuff!! ☺
Within a week here the bloom has gone from bright green N sufficient to N limited, and last year we tested it with a 2- day nutrient addition bioassay, where we were able to make it N sufficient again by adding NO3. All the green Cubitainers received N.
For two and a half decades, ModMon has provided valuable information on water quality and habitat conditions in the Neuse River Estuary and Pamlico Sound. These data are crucial for evaluating how conditions are changing in response to human and climatic pressures. ModMon has also served as a platform to support research projects aimed at figuring out how estuaries work from ecological, geological, physical, and biogeochemical perspectives.
Conditions on 4 June 2019 were pretty typical for this time of year. Salinities ranged from zero above New Bern to a maximum of about 15 in the bottom waters near the mouth. Stratification was not particularly intense except at station 160 which was influenced by saltier bottom water likely from the Intracoastal Waterway. Hypoxic conditions occurred throughout most of the length of the estuary but were confined to a thin, ~1 m thick, layer near the bottom. A zone of high DO, high pH, and high chlorophyll a was observed at station 30 near New Bern. Microscopic examination of surface waters from station 30 revealed a high concentration of cryptophytes that are generally good food for higher trophic levels, and don’t cause problems.
June commemorates the ModMon project, launching 25 years ago.
During the past two and a half decades, ModMon has supported over 80 publications and reports in premier, peer-reviewed journals and books. These publications have had major impacts on research, management and decision-making concerning North Carolinas estuaries.
A bit about ModMon