The seasonal biological surveys of 1971 / John C. Ayers, Samuel C. Mozley, John A. Stewart.

TABLE 5 continued.

8 NOVEMBER 1971 cont.

Dictyosphaeriwn sp.
Dinobryon divergens
Diploneis parma
Diploneis sp.
Elakatothrix sp.
Flagellates
Fragi aria capucina
Fragilaria crotonensis
Fragilaria intermedia v. faZlax
FragiZaria pinnata
Fragilaria sp.
Glenodinium sp.
Gloeocystis sp.
Gomphosphaeria sp.
Green colony, unknown
Green solitary, unknown
Gyrosigma sp.
KirchnerielZa sp.
Lagerheimia sp.
Melosira islandica
MeZosira islandica auxospores
MeZosira sp.
Merismopedia sp.
Micractinium sp.
Mougeotia sp.
Navicula platystoma v. pantocsekii
Navicula radiosa
Navicula sp.
Nephrocytium sp.
Nitzschia acicularis
Nitzschia paZea

Nitzachia recta
Nitzschia sp.
Ochromonas sp.
Oedogoninu sp.
Oocystis sp.
Oscillatoria sp.
Pediastrum boryanwn
Penium sp.
Peridinium sp.
Quadrigula sp.
RhizosoZenia eriensis
Rhizosolenia sp.
Scenedesmus bijuga
Scenedesmus dimorphus
Scenedesmus quadricauda
Scenedesmus sp.
Schroederia sp.
Sphaerocystis sp.
Staurastrum cuspidatuwn
Staurastrum gracile
Staurastrum sp.
Staurodesmus connatus
Stephanodiscus sp.
Surirella sp.
Synedra filiformis
Synedra sp.
Synedra ulna
TabelZaria fenestrata
Tetraedron caudatum
Tetraedron minimum

Table 6 is a summary table presenting station by station the numbers of
phytoplankton species or groups collected, the numbers of individual phytoplankters per milliliter, and the Wilhm and Dorris diversity index of each
station's collection. The diversity index of Wilhm and Dorris (1968) is
d = - I (Ni/N) log2 (Ni/N)
in which (Ni/N) is the percentage of the population, N, that is represented b:
any one species or group, Ni, of the collection. Computed for each species o:
group and summed, the calculation yields a diversity index for the station
collection.

33