Louisiana shelf

N. Chen, T.S. Bianchi, B.A. McKee and J.M. Bland, Historical trends of hypoxia on the Louisiana shelf application of pigments as biomarkers. Org. Geochem. 32 (2001) 543-561. 

Biddandah, B., S. Opsahl, and R. Benner. 1994. Plankton respiration and carbon flux through bacterioplankton on the Louisiana shelf. Limnology and Oceanography 39 1259-1275. 

Figure 11.7 Total particulate phase content of phosphorus [e.g., labile, Fe-P, organic P (Org-P), calcium phosphate (Ca-P), and detrital phosphorus (Detr-p)] in total suspended solids (TSS) (pg g-1 dry wt. TSS) in waters of the lower Mississippi River and inner Louisiana shelf, versus seasonal variability and increasing salinity. (Modified from Sutula et al 2004.)...

Figure 15.13 Down-core distribution of bacteriochlorophyll-e homologs, along with the more stable bacteriopheophytin-e, in sediments collected in the hypoxic region of the Louisiana shelf in 1998 and 1999. (Modified from Chen et al., 2001.)...

Bianchi, T.S., Mitra, S., and McKee, M. (2002b) Sources of terrestrially-derived carbon in the Lower Mississippi River and Louisiana shelf Implications for differential sedimentation and transport at the coastal margin. Mar. Chem. 77, 211-223. 

Chen, N., Bianchi, T.S., and Bland, J.M. (2003a) Novel decomposition products of chlorophyll-a in continental shelf (Louisiana shelf) sediments Formation and... 

Gordon, E.S., Goni, M.A., Roberts, Q.N., Kineke, G.C., and Allison, M.A. (2001) Organic matter distribution and accumulation on the inner Louisiana shelf west of the Atchafalaya River. Cont. Shelf Res. 21, 1691-1721. 

Sylvan, J. B., Dortch, Q., Nelson, D. M., Maier Brown, A. F., Morrison, W., and Ammerman, J. W. (2006). Phosphorus hmits phytoplankton growth on the Louisiana shelf during the period of hypoxia formation. Environ. Sci. Technol. 40, 7548—7553. 

Strongly suggesting that anthropogenic changes in Si N ratios have directly selected for this cosmopolitan diatom. The recent evidence from China (Zhao et ai, 2005) suggests that these patterns are not isolated to the Louisiana shelf... 

A number of coastal systems also display evidence of phosphate limitation, sometimes shifting seasonally from nitrogen to phosphate limitation in concert with changes in environmental features such as up-welling and river runoff. On the Louisiana Shelf in the Gulf of Mexico, the Eel River Shelf of northern California (USA), the upper Chesapeake Bay (USA), and portions of the Baltic Sea, surface water column dissolved inorganic N P ratios indicate seasonal... 

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