Nitrogen ecophysiology of intertidal seaweeds from New Zealand: N uptake, storage and utilisation in relation to shore position and season

By J. Phillips, C. Hurd. 2003

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KINETICS OF NITRATE, AMMONIUM, AND UREA UPTAKE BY FOUR INTERTIDAL SEAWEEDS FROM NEW ZEALAND 1 (2004, methodology): “The degree of N limitation (inferred from tissue N and C:N levels) suggested that intertidal seaweeds in southeast New Zealand, particularly those growing higher on the shore, are not necessarily N limited, as might be expected because of short submersion times (Phillips and Hurd 2003).”
Intertidal community structure and oceanographic patterns around Santa Cruz Island, CA, USA (2006, methodology): “status of seaweeds can be inferred from their C:N ratio (Anderson et al. 1999; Phillips and Hurd 2003) and based on the values reported here, E.”
Seaweed nutrient physiology: application of concepts to aquaculture and bioremediation (2019, background): “…also an important source of nitrogen for seaweeds: in southern New Zealand urea provided c. 30% of nitrogen to four species of intertidal seaweed in summer (Phillips & Hurd 2003), and in California, USA, urea represents an important year-round supply of nitrogen to M. pyrifera (Smith et al. 2018).”
Seasonal growth, erosion rates, and nitrogen and photosynthetic ecophysiology of Undaria pinnatifida (Heterokontophyta) in southern New Zealand 1 (2007, background): “For intertidal seaweeds, ammonium was the preferred N source in winter when light (and hence energy) levels were low, while nitrate and ammonium were of equal importance in summer (Phillips and Hurd 2003).”