Patuxent River estuary

Bartell, S.M. (2003) A framework for estimating ecological risks posed by nutrients and trace elements in the Patuxent River, Estuaries 26, 385-397. 

Figure 18.7 Salinity versus concentration plots for NO2 + NO3 during dry, average and wet years in the Patuxent River estuary. Summer and winter values are shown in each panel. Data were from the Chesapeake Bay Water Quality Monitoring Program (2004).

Figure 18.15 Comparative analysis of net ecosystem production for estuaries in relation to loading ratio for DIN TOG Data sources are for MERL mesocosms (Oviatt et al., 1986), for Narragansett Bay (Nixon eta/., 1995), forXomales Bay (Smith andHollibaugh, 1997), for San Francisco Bay (Jassby et al, 1993), for Chesapeake Bay (Kemp et al, 1997), and for Patuxent River estuary in 1985—1994 (Kemp et al, 1999). Figure was adapted from Kemp et al (1997). The DlN TOC load ratio was based on external inputs of DIN (NO3 + NO2 + NH4) andTotal Organic Carbon (TOC) to each site.

Figure 18.18 A scatter plot of predicted versus measured NH4 fluxes for the mesohaline region of the Patuxent River estuary. Data and figure are from Stankelis a/. (1999).

Testa, J. M., and Kemp, W. M. (2005). Stoichiometry of Biogeochemical Fluxes in the Patuxent River Estuary, USA. Presentation at American Society of Limnology Oceanography, Santiago de Compostela, Spain. 

Patuxent River Estuary, 1.85-2.14 Stoichiometry Jenkins and Kemp... 

Fortunately, we are beginning to actually detect measurable improvements in the water quality of some estuaries due to scientifically based nutrient reductions and extensive longterm monitoring studies. For example, the Patuxent River in Maryland (USA), a tributary of the Chesapeake Bay, experienced extensive eutrophication from sewage inputs and non-point sources over four decades (1960-2000 D Elia et al., 2003). 

D Elia, C.F., Boynton, W.R., and Sanders, J.G (2003) A watershed perspective on nutrient enrichment, science, and policy in the Patuxent River, Maryland 1960-2000. Estuaries 26, 171-185. 

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