USGS Open-File Report 02-012
Physical Data and Biological Data for Algae, Aquatic Invertebrates, and Fish from Selected Reaches on the Carson and Truckee Rivers, Nevada and California, 1993-97
Table 17. Algal density in richest-targeted habitat at sites on the Truckee River: Truckee River at Wadsworth, Nev. (site 18, fig. 1), Truckee River at Dead Ox Wash near Nixon, Nev. (site 19, fig. 1), and Truckee River at Highway 447 at Nixon, Nev. (site 20, fig. 1), 1993-95. Habitats sampled were gravel and cobble riffles.
[Abbreviations: cells/cm2, cells per square centimeter; sp., species]
| Taxon | Site 18, Oct. 13, 1995 (cells/cm2) |
Site 19 | Site 20, Oct. 12, 1995 (cells/cm2) |
||
|---|---|---|---|---|---|
| July 8, 1993 (cells/cm2) |
Sept. 16, 1994 (cells/cm2) |
Oct. 6, 1995 (cells/cm2) |
|||
|
Total number of cells (rounded) |
3,900,000 | 2,400,000 | 27,000,000 | 5,400,000 | 2,500,000 |
| CYANOPHYTA | |||||
| Unidentified species | 11,000 | 390,000 | |||
| Cyanophyceae | |||||
| Chroococcales | |||||
| Chroococcaceae | |||||
| Merismopedia tenuissima | 410,000 | ||||
| Chamaesiphonales | |||||
| Chamaesiphonaceae | |||||
| Chamaesiphon incrustans | 11,000 | ||||
| Nostocales | |||||
| Nostocaceae | |||||
| Anabaena sp. | 13,000,000 | ||||
| Cylindrospermum minutum | 390,000 | ||||
| Oscillatoriaceae | |||||
| Lyngbya sp. | 420,000 | 640,000 | 520,000 | 210,000 | 94,000 |
| Rivulariaceae | |||||
| Calothrix sp. | 1,400,000 | 280,000 | |||
| Calothrix parietina | 71,000 | ||||
| Oscillatoria sp. | 350,000 | 380,000 | 150,000 | ||
| CRYPTOPHYTA | |||||
| Undetermined sp. | 28,000 | ||||
| BACILLARIOPHYTA | |||||
| Coscinodiscophyceae | |||||
| Thalassiosirales | |||||
| Stephanodiscaceae | |||||
| Cyclotella meneghiniana | 5,300 | 5,700 | 48,000 | 19,000 | |
| Melosirales | |||||
| Melosiraceae | |||||
| Melosira varians | 790,000 | ||||
| Aulacoseirales | |||||
| Aulacoseiraceae | |||||
| Aulacoseira ambigua | 73,000 | 32,000 | 12,000 | ||
| Aulacoseira granulata | 7,700 | ||||
| Aulacoseira italica | 16,000 | ||||
| Triceratiales | |||||
| Triceratiaceae | |||||
| Pleurosira laevis | 24,000 | 7,900 | 3,800 | ||
| Fragilariophyceae | |||||
| Fragilariales | |||||
| Fragilariaceae | |||||
| Diatoma vulgare | 96,000 | 5,700 | 37,000 | 32,000 | 140,000 |
| Fragilaria exiguiformis | 5,700 | 640,000 | |||
| Fragilaria vaucheriae | 16,000 | ||||
| Hannaea arcus | 16,000 | ||||
| Pseudostaurosira brevistriata | 5,300 | 95,000 | 85,000 | ||
| Fragilaria brevistriata inflata | 11,000 | 95,000 | |||
| Fragilaria construens pumila | 8,000 | 440,000 | 40,000 | 31,000 | |
| Staurosira construens binodis | 11,000 | 85,000 | 920,000 | 32,000 | 35,000 |
| Staurosira construens venter | 110,000 | 79,000 | 1,300,000 | 200,000 | 190,000 |
| Staurosirella pinnata | 27,000 | 450,000 | 1,900,000 | 300,000 | 190,000 |
| Fragilaria pinnata lancettula | 5,300 | 32,000 | |||
| Synedra acus | 37,000 | ||||
| Synedra ulna | 2,700 | 88,000 | 55,000 | ||
| Bacillariophyceae | |||||
| Cymbellales | |||||
| Cynbellaceae | |||||
| Cymbella affinis | 16,000 | 71,000 | 31,000 | ||
| Encyonema minutum | 8,000 | 7,900 | |||
| Reimeria sinuata | 35,000 | 5,700 | 56,000 | 35,000 | |
| Gomphonemataceae | |||||
| Gomphoneis eriense variabilis | 11,000 | ||||
| Gomphoneis olivacea | 16,000 | 5,700 | 37,000 | 64,000 | |
| Gomphonema sp. | 8,000 | 11,000 | 200,000 | 150,000 | 23,000 |
| Gomphonema angustatum intermedia | 7,900 | ||||
| Gomphonema parvulum | 5,300 | 73,000 | 7,700 | ||
| Gomphonema truncatum | 37,000 | ||||
| Gomphonema truncatum capitatum | 2,800 | ||||
| Rhoicospheniaceae | |||||
| Rhoicosphenia abbreviata | 260,000 | 23,000 | 73,000 | 440,000 | 85,000 |
| Achanthales | |||||
| Achnanthidiaceae | |||||
| Achnanthidium exiguum | 37,000 | ||||
| Achnanthidium minutissimum | 24,000 | 2,800 | 48,000 | ||
| Planothidium dubium | 37,000 | 7,700 | |||
| Planothidium lanceolatum | 7,900 | ||||
| Rossithidium pusillum | 2,700 | 7,900 | 7,700 | ||
| Cocconeidaceae | |||||
| Cocconeis pediculus | 210,000 | 57,000 | 240,000 | 490,000 | 260,000 |
| Cocconeis placentula euglypta | 200,000 | 97,000 | 300,000 | 300,000 | |
| Cocconeis placentula lineata | 32,000 | 24,000 | 15,000 | ||
| Naviculales | |||||
| Naviculaceae | |||||
| Geissleria decussis | 5,700 | ||||
| Hippodonta capitata | 2,700 | 7,900 | |||
| Navicula sp. | 13,000 | 64,000 | 35,000 | ||
| Navicula cincta rostrata | 37,000 | ||||
| Navicula genovefae | 7,900 | ||||
| Navicula graciloides | 5,700 | ||||
| Navicula gregaria | 37,000 | 3,800 | |||
| Navicula minima | 37,000 | ||||
| Navicula ochridana | 37,000 | ||||
| Navicula paucivisitata | 37,000 | ||||
| Navicula radiosa | 37,000 | ||||
| Navicula rhynchocephala germainii | 19,000 | 17,000 | 73,000 | 170,000 | 54,000 |
| Navicula salinarum intermedia | 120,000 | 28,000 | 550,000 | 190,000 | |
| Navicula secreta apiculata | 11,000 | 7,900 | 7,700 | ||
| Navicula tripunctata | 24,000 | 5,700 | 37,000 | 95,000 | 140,000 |
| Navicula tripunctata schizonemoides | 2,700 | 14,000 | |||
| Navicula viridula avenacea | 16,000 | 40,000 | 35,000 | ||
| Pinnulariaceae | |||||
| Caloneis ventricosa truncatula | 5,700 | ||||
| Sellaphoraceae | |||||
| Sellaphora pupula | 24,000 | 5,700 | 18,000 | 16,000 | 15,000 |
| Thalassiophysales | |||||
| Catenulaceae | |||||
| Amphora ovalis pediculus | 32,000 | 7,700 | |||
| Amphora perpusilla | 7,700 | ||||
| Bacillarales | |||||
| Bacillariaceae | |||||
| Nitzschia acicularis | 37,000 | ||||
| Nitzschia amphibia | 40,000 | 710,000 | 77,000 | ||
| Nitzschia dissipata | 11,000 | 73,000 | 56,000 | 23,000 | |
| Nitzschia dissipata media | 11,000 | 15,000 | |||
| Nitzschia fonticola | 140,000 | 7,700 | |||
| Nitzschia frequens | 16,000 | 7,700 | |||
| Nitzschia frustulum | 24,000 | 110,000 | 48,000 | ||
| Nitzschia frustulum perminuta | 140,000 | 2,800 | 220,000 | 130,000 | 170,000 |
| Nitzschia frustulum subsalina | 73,000 | ||||
| Nitzschia kuetzingiana | 110,000 | 7,700 | |||
| Nitzschia linearis tenuis | 5,300 | 7,900 | 7,700 | ||
| Nitzschia palea | 11,000 | ||||
| Nitzschia romana | 2,700 | ||||
| Tryblionella hungarica | 16,000 | ||||
| Tryblionella victoriae | 7,900 | ||||
| Rhopalodiales | |||||
| Rhopalodiaceae | |||||
| Epithemia sorex | 650,000 | 3,000,000 | 3,800 | ||
| Epithemia turgida | 17,000 | 91,000 | |||
| Rhopalodia gibba ventricosa | 37,000 | ||||
| Rhopalodia gibberula | 8,500 | ||||
| Surirellales | |||||
| Surirellaceae | |||||
| Cymatopleura solea | 37,000 | 3,800 | |||
| Surirella angusta | 7,700 | ||||
| Surirella minuta | 2,700 | ||||
| CHLOROPHYTA | |||||
| Undetermined species | 22,000 | 430,000 | 68,000 | ||
| Chlorophyceae | |||||
| Volvocales | |||||
| Chlamydomonadaceae | |||||
| Chlamydomonas sp. | 28,000 | ||||
| Chlorococcales | |||||
| Oocystaceae | |||||
| Ankistrodesmus falcatus | 5,400 | 200,000 | 14,000 | ||
| Kirchneriella lunaris | 5,400 | 28,000 | |||
| Scenedesmaceae | |||||
| Scenedesmus denticulatus | 130,000 | ||||
| Chaetophorales | |||||
| Chaetophoraceae | |||||
| Stigeoclonium lubricum | 42,000 | ||||
| Oedogoniales | |||||
| Oedogoniaceae | |||||
| Oedogonium sp. | 21,000 | 160,000 | 70,000 | ||
| Ulvophyceae | |||||
| Cladophorales | |||||
| Cladophoraceae | |||||
| Cladophora sp. | 22,000 | ||||
| Charophyceae | |||||
| Zygnemateles | |||||
| Zygnemataceae | |||||
| Mougeotia sp. | 42,000 | ||||