Phytoplankton 



The phytoplankton was dominated numerically by Nannochloris atomus, 

 a very small (less than 3p diameter) Chlorella -like algae. Nannochloris 

 atomis densities showed no clearly defined changes with location or 

 season in the sampling area (Table 9). Densities of the larger phyto- 

 plankters (greater than 5 p) increased somewhat moving east from Throgs 

 Neck to Station 6; peak densities tended to occur later in the season 

 moving in the same direction (Table 9). Very high densities for Station 6 

 on July 22 and August 2 were cheifly due to the presence of the dino- 

 flagellates Massartia rotundata and Prorocentrum micans , respectively. 

 Computerized listings of phytoplankton species and their densities are 

 given in Appendix 1. 



Zooplankton 



Species of copepods collected with #8 mesh net, and their order of 

 abundance, are listed in Table 10. Acartia clausii was the dominant 

 copepod from early April until the end of July. It reached peak numbers 

 (over 4,4(X)/m-^) in early June. Acartia tonsa first appeared in early 

 July and was the dominant copepod from mid-July to the end of the study 

 in late August (Figs. 18-22). Other copepods present were Temora 

 longicornis , Paracalanus parvus , Pseudocalanus minutus, Eurytemora 

 hirundoides , Tortanus discaudatus , Oithona sp. and Tachidius brevicornis . 

 Tortanus discaudatu s did not appear in the #8 mesh net subsample but was 

 found in ^/O mesh and epibenthic sled samples. 



