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<br /> Appendix A. Taxa, densities of richest-targeted habitat periphyton, and sampling date for environmental samples at sites in the Upper Colorado River Basin study unit, 1996-97--continued
<br /> ---
<br /> [--, species not found in sample; A, abundance as cells per square centimeter; B, biovolume as cubic micrometers per square centimeter; densities and biovolumes rounded to 3 significant
<br /> figures;
<br /> 11, micrometer; <, less than; Site abbreviations are used in this table. See table I for full site names]
<br /> Gunn32 Gunn32 GunnTunn GunnTunn Dotsero Dotsero
<br /> 8/96 8/97 8/96 8/97 8/96 8/97
<br /> A B A B A B A B A B A B
<br /> DIVISION
<br /> Family
<br /> Genus species variety
<br /> Nitzschia frustulum perminuta 10,400 513 ,000 2,400 87,000 1,560 76,800 1,260 45,500 15,200 748,000 3,630 132,000
<br /> Nitzschia fruticosa 314 58,500
<br /> Nitzschia gracilis 157 17,900
<br /> Nitzschia hantzschiana
<br /> Nitzschia hungarica
<br /> Nitzschia legleri
<br /> Nitzschia linearis 243 420,000 1,210 2,090,000
<br /> Nitzschia palea 314 55,200
<br /> Nitzschia palea debilis 579 45,300 521 40,800 392 30,700
<br /> Nitzschia palea surnatrana 121 17,700
<br /> Nitzschia paleacea 1,150 35,100 1,210 37,000
<br /> Nitzschia paleaeformis
<br /> Nitzschia pusilla
<br /> Nitzschia supralitorea 68 2,570
<br /> Nitzschia tubicola
<br /> Nitzschia umbilicata
<br /> Nitzschia vermicularis
<br /> Simonsenia delognei 104 1,000
<br /> Surirellaceae
<br /> Cymatopleura solea 579 3,830,000
<br />N Surirella angusta 579 427,000
<br />-..)
<br /> Surirella brebissonii
<br /> Surirella minuta 314 134,000
<br /> Thalassiosiraceae
<br /> Aulacosira distans
<br /> Aulacosira italica
<br /> Cyclostephanos invisitatus
<br /> Cyclotella meneghiniana
<br /> Cyclotella ocellata
<br /> Cyclotella pseudostelligera 242 1,220
<br /> Stephanodiscus hantzschii 68 19,800
<br /> Stephanodiscus medius 68 6,060
<br /> Stephanodiscus sp. (2 ANS WRC) 208 4,090 68 673 8,480 166,000
<br /> CRYPTOPHYTA (cryptomonads)
<br /> Cryptomonadaceae
<br /> Cryptomonas sp.
<br /> CYANOPHYTA (blue-green algae)
<br /> Chroococcaceae
<br /> Microcystis sp.
<br /> Nostocaceae
<br /> Amphithrix Janthina 28,400 1,160,000 16,700 681,000
<br /> Calothrix parientina
<br /> Calothrix sp. 812,000 487,000
<br /> Nostoc sp. 3,170 81,200
<br /> Oscillatoriaceae
<br />
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