Aerial and Field SAV Observations

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Hart-Miller Island SAV June 2013 Survey

August 13th, 2013 by rgriner · No Comments

Maryland Environmental Service (MES) Environmental Staff conducted an SAV survey along the western side of Hart-Miller Island (HMI) on June 27, 2013.  HMI is located at the mouth of Back River near Hawk Cove in Baltimore County.  Observations were made along two 3 mile transects 20 ft. and 50 ft. off of the western shoreline where water depths are shallow enough to support SAV growth, specifically from the most southern tip of the Hart Island remnant to the southern end of the Miller Island remnant.  The SAV beds were mainly observed by using a modified thatch rake, attached to approximately 15 yards of nylon rope, off of a boat.  Transects are split from southern tip of Hart Island to MES pier, MES pier to Drum Point, Drum Point to just south of the HMI DNR Start Park beach jetty, beach Jetty 1 through 14, and just north of the beach jetties to the southern end of Miller island. 

 

 The observed bay grasses in the June 2013 survey declined significantly compared to previous years.  Only two species wild celery (Vallisneria americana) and curly pondweed (Potamogeton crispus) were identified. Wild celery was more abundant and on average was found in sparse beds between the beach jetties and toward the end of Millers Island.  Curly pondweed was noted in very sparse beds between the beach jetties. 

 

The average Secchi depth during the June survey was 1.6 ft.  The majority of SAV was observed between the jetties.  Water depth ranged from 3.0 ft. to 7+ ft.  Overall estimated coverage of SAV in the area surveyed was 5 %.

Tags: SAV Observations

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