Table 2.

Phytoplankton composition in the NL from April 2007 to June 2008. Taxa with abundances higher than 50 cells mL⁻¹ were considered abundant and denoted with “xx”. All other genera or species that occurred were marked with a single “x”.

	April 2007	June 2007	August 2007	November 2007	April 2008	June 2008
Ochromonas	xx	xx	xx	xx	xx	x
Chorella	xx	xx	x		xx	xx
Tetramites	x	x	xx	xx	xx
Cryptomonas	x	x			xx	xx
Dinobryon		xx				xx
Fragilaria		xx	x		x	xx
Scenedesmus		x				x
Peridinium		x	xx	x	x	x
Gynodinium		x	xx	x	x	x
Chlamydomonas		x	xx	xx	xx	x
Synedra		x				x
Nitzschia		x	x		x	x
Hyalogonium		x	x		x	x
Pinnularia		x
Lepocinclis	x		x
Rhizosolenia			x		x
Navicula			x
Achnanthes			x
Chroococcus					xx	x
Asterococcus					xx	x
Euglena						x
Ankistrodesmus						x
Number of species	5	14	13	5	13	16
Shannon diversity	0.007	0.784	0.620	0.488	0.657	0.663