2016 Hudson Data Jam Competition

Making data "sing" through creative expression

Now in its third year, the Hudson Data Jam Competition challenges students to creatively tell stories for a general audience using data from the Hudson River watershed.

Registration for 2016 is closed.

Level 1: Oxygen Levels in Three Aquatic Habitats

Level 1: Oxygen Levels in Three Aquatic Habitats


Scientists sampled the dissolved oxygen levels in three different aquatic habitats: Trapa natans (water chestnut beds), Vallisneria americana (water celery beds), and the open river channel. All samples were taken from the freshwater tidal section of the Hudson River.

Trapa is an introduced floating plant present in the Hudson River. Vallisneria is a native submersed (underwater) plant present in the Hudson River.

Healthy aquatic habitats usually have dissolved oxygen levels at or above 80% saturation. Most fish and other organisms cannot live below 30% dissolved oxygen saturation, which is considered hypoxic. A dissolved oxygen level of 0% saturation is called anoxic, which means there is no dissolved oxygen present.

Data were published in "Vascular Plants as Engineers of Oxygen in Aquatic Systems" by Nina Caraco, Jonathan Cole, Stuart Findlay, and Cathleen Wigand in Bioscience (2006) 56(3): 219-225.


Click here for Dissolved Oxygen in Three Hudson River Habitats Data


Data Source: Caraco et al. 2006

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