Application of this method during the spring bloom period (9 May to 26 June) provided the first non-invasive time series dataset used to monitor changes in bottom ice chi a concentration, an index of algal biomass, at a single point location.
A bottom ice temperature gradient (TG; [degrees]C [m.
Fortier et ah, 2002; Mundy et ah, 2009; Arrigo et ah, 2012), as well as the observed aggregates of ice algae sloughed from the ice between the sensor and ice interface, would falsely increase biomass estimates of the bottom ice chl a.
Nevertheless, values of bottom ice chi a concentration and all environmental variables except [E.
Warming of the bottom ice can negatively affect ice algae biomass by causing a) ice ablation, resulting in the sloughing of algae from the ice into the water column (Lavoie et al.
The influence of bottom ice melt on removal of algal cells, particularly the influence of changes in thickness to the bottom skeletal layer, could not be assessed in this study.
In addition, under higher light conditions, the relative production of proteins of the bottom ice algae decreased, whereas the lipid proportion increased.
To evaluate the changes in the photosynthetic carbon allocation of the ice algae community under different light conditions, we analyzed relative rates of production of different macromolecules from the ice algal productivity experiment on 28 April 2003, when the bottom ice algal biomass was sufficiently large to conduct the experiment.
The chlorophyll-a concentration of the bottom ice algae was highest on 28 April 2003.
Physical parameters and chlorophyll-a concentrations in the bottom ice (3 cm) at the sampling sites on the land fast-sea ice at Barrow in 2003.
2005) showed with a model that nutrient levels in the bottom ice may fluctuate greatly during a diurnal cycle.