IAN Seminar Series 2014

The goal of the IAN seminar series is to provide concise, thought-provoking ideas relating to Chesapeake Bay science and management. Short presentations (15 minutes maximum length) are immediately followed by a lunchtime discussion of the topics raised by the presenter. The discussion is summarized and is posted along with a pdf version of the seminar slides. The seminars are captured on video and posted under a Creative Commons license so they can be freely shared.

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DateSpeakerSeminarSeries
Tue 31
Aug
2010
http://ian.umces.edu/seminarseries/
Emerging hypoxia trends in the South River - Andrew Muller (USNA) - IAN Seminar Series
2010-08-31T12:00:00-04:00 2010-08-31T13:00:00-04:00
Macknis Room, Chesapeake Bay Program Office, 410 Severn Avenue (Suite 109), Annapolis MD
Hypoxia trends in the South River have been documented over summer (April-August) 2010. Twenty-one sites, seven of which are in the mainstem, were sampled weekly. Two stations were added in the past year based on feedback from the MTAC (Mid-Atlantic Tributary Assessment Coalition) group. In April 2010, hypoxic  (low dissolved oxygen) conditions started to emerge. Stratification in the mainstem South River is rather ephemeral, with the water column mixing weekly or in some locations, even daily from strong wind events. Stratification typically fosters low dissolved oxygen conditions. The summer was characterized by high temperatures--driven by La Nina--and strong wind events from the south and southeast. During May, DO conditions were not as low as usual for the time of year. Sampling location order was varied to diversify wind and tidal stage conditions found throughout the day. One station is too shallow to be sampled except during an incoming or flood tide, due to altered hydrodynamics resulting from Route 50. In late July, anoxic conditions began to develop relatively high the water column. Anoxic (no DO) and hypoxic (low DO) conditions create a habitat squeeze, in which fish, crabs, and other animals are forced higher in the water column to find sufficient DO conditions. In August, conditions alternatively showed anoxic and hypoxic waters. To enhance data collection, the South River has started experimenting with several autonomous underwater vehicles (AUVs) with attached sensors to monitor spatial and temporal trends within the river.
Andrew Muller
USNA
amuller@usna.edu

Diana Muller (South River Federation)
riverkeeperdiana@southriverfederation.net
Emerging hypoxia trends in the South River

Citizens for Science
mtac logo

Abstract

Hypoxia trends in the South River have been documented over summer (April-August) 2010. Twenty-one sites, seven of which are in the mainstem, were sampled weekly. Two stations were added in the past year based on feedback from the MTAC (Mid-Atlantic Tributary Assessment Coalition) group. In April 2010, hypoxic  (low dissolved oxygen) conditions started to emerge. Stratification in the mainstem South River is rather ephemeral, with the water column mixing weekly or in some locations, even daily from strong wind events. Stratification typically fosters low dissolved oxygen conditions. The summer was characterized by high temperatures--driven by La Nina--and strong wind events from the south and southeast. During May, DO conditions were not as low as usual for the time of year. Sampling location order was varied to diversify wind and tidal stage conditions found throughout the day. One station is too shallow to be sampled except during an incoming or flood tide, due to altered hydrodynamics resulting from Route 50. In late July, anoxic conditions began to develop relatively high the water column. Anoxic (no DO) and hypoxic (low DO) conditions create a habitat squeeze, in which fish, crabs, and other animals are forced higher in the water column to find sufficient DO conditions. In August, conditions alternatively showed anoxic and hypoxic waters. To enhance data collection, the South River has started experimenting with several autonomous underwater vehicles (AUVs) with attached sensors to monitor spatial and temporal trends within the river.



Time and Venue

Seminars start at 12 noon, scheduled for 45 mins (15 mins plus 30 min question/discussion time).

Science for Citizens seminars are held in the Joe Macknis Conference Room (Fish Shack) at the Chesapeake Bay Program Office, 410 Severn Avenue, Annapolis MD 21403, immediately following the monthly meetings of the Science Technical Analysis and Reporting (STAR) team meetings.

Citizens for Science seminars are conducted at the UMCES Annapolis Office, 1 Park Place, Suite 325, Annapolis, MD 21401.



Inquiries

If you have any queries or would like to contribute to next year's seminar series, please contact:

Jane Thomas ()
Bill Dennison ()