Nitrogen and phosphorus are important limiting nutrients in some aquatic ecosystems and are determining factors in the amount of phytoplankton growth. when there is a large input of nitrogen and phosphorus the growth of phytoplankton and algae drastically increases, resulting in a large accumulation called an algal bloom and this in turn causes aphotic zones in aquatic ecosystems. in aphotic zones, photosynthetic organisms cannot survive. we would expect this to happen most often in what ecosystem(s)?
a) ocean
b) lake and pond
c) ocean and river
d) river and stream