Until the early 1980s, nutrient-limitation studies showed that primary productivity in the lake was nitrogen-limited.

This phosphate would have supported greater primary productivity in the surface oceans.

They prefer areas with high primary productivity and nitrogen soil concentrations.

Changes in the temperature ranges will also change the location of areas with high primary productivity.

Migration of marine mammals may also be affected by the changes in primary productivity.

Both of these factors result in the area being one of enhanced primary productivity as compared to the surrounding waters.

Warm core rings are known to have lower primary productivity than surrounding cold waters.

I think most would agree we could all use more primary productivity.

These datasets are unique in that they provide global data on primary productivity and span a decade.

More commonly, the ratio is affected by variations in primary productivity and organic burial.