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 16. Algal density in richest-targeted habitat at sites on the Truckee River: Truckee River at Clark, Nev. (site 17, fig. 1), 1993-96. Habitats sampled were cobble riffles.
[Abbreviations: cells/cm2, cells per square centimeter; sp., species]
| Taxon | Reach A, Sept. 21, 1993 (cells/cm2) |
Reach B, Sept. 7, 1993 (cells/cm2) |
Reach C, Sept. 7, 1993 (cells/cm2) |
Reach C, July 7, 1994 (cells/cm2) |
Reach C, Oct. 3, 1995 (cells/cm2) |
Reach C, Oct. 8,1996 (cells/cm2) |
|---|---|---|---|---|---|---|
| Total number of cells (rounded) | 800,000 | 480,000 | 1,300,000 | 8,900,000 | 2,000,000 | 3,700,000 |
| CYANOPHYTA | ||||||
| Unidenitified species | 210,000 | |||||
| Cyanophyceae | ||||||
| Chroococcales | ||||||
| Chroococcaceae | ||||||
| Dactylococcopsis rhaphidioides | 26,000 | 5,000 | ||||
| Nostocales | ||||||
| Oscillatoriaceae | ||||||
| Hydrocoleum brebissonii | 750,000 | |||||
| Lyngbya sp. | 450,000 | 110,000 | 140,000 | |||
| Oscillatoria sp. | 53,000 | 610,000 | ||||
| Rivulariaceae | ||||||
| Calothrix parietina | 940,000 | |||||
| EUGLENOPHYTA | ||||||
| Euglenophyceae | ||||||
| Euglenales | ||||||
| Euglenaceae | ||||||
| Euglena sp. | 4,900 | 3,800 | ||||
| BACILLARIOPHYTA | ||||||
| Coscinodiscophyceae | ||||||
| Thalassiosirales | ||||||
| Stephanodiscaceae | ||||||
| Cyclotella meneghiniana | 590 | 2,200 | 6,300 | |||
| Melosirales | ||||||
| Melosiraceae | ||||||
| Melosira varians | 2,200 | 3,000 | ||||
| Aulacoseirales | ||||||
| Aulacoseiraceae | ||||||
| Aulacoseira ambigua | 69,000 | |||||
| Fragilariophyceae | ||||||
| Fragilariales | ||||||
| Fragilariaceae | ||||||
| Diatoma vulgare | 4,700 | 5,600 | 9,400 | 32,000 | ||
| Fragilaria vaucheriae | 2,200 | 14,000 | 9,400 | 3,600 | ||
| Hannaea arcus | 590 | |||||
| Martyana martyi | 28,000 | |||||
| Pseudostaurosira brevistriata | 9,400 | |||||
| Fragilaria brevistriata inflata | 6,300 | 3,600 | ||||
| Staurosira construens | 4,500 | |||||
| Fragilaria construens pumila | 2,200 | 120,000 | 20,000 | |||
| Fragilaria construens subsalina | 4,100 | 4,500 | ||||
| Staurosira construens binodis | 7,000 | 5,600 | 16,000 | |||
| Staurosira construens venter | 21,000 | 3,400 | 3,700 | 170,000 | 110,000 | |
| Staurosirella pinnata | 44,000 | 40,000 | 28,000 | 170,000 | 100,000 | 11,000 |
| Fragilaria pinnata lancettula | 13,000 | |||||
| Synedra mazamaensis | 1,100 | 3,600 | ||||
| Synedra rumpens | 14,000 | |||||
| Synedra ulna | 4,100 | 5,000 | ||||
| Cymbellales | ||||||
| Cynbellaceae | ||||||
| Cymbella affinis | 1,200 | 1,100 | 45,000 | |||
| Cymbella tumida | 1,800 | |||||
| Cymbella turgidula | 6,300 | |||||
| Encyonema minutum | 2,300 | 560 | 14,000 | 16,000 | 3,600 | |
| Encyonema muelleri | 28,000 | |||||
| Reimeria sinuata | 1,700 | 1,900 | 47,000 | 14,000 | ||
| Gomphonemataceae | ||||||
| Gomphoneis herculeana | 590 | 6,300 | 5,400 | |||
| Gomphoneis olivacea | 6,300 | |||||
| Gomphonema sp. | 14,000 | 4,500 | 1,600,000 | |||
| Gomphonema angustatum | 560 | |||||
| Gomphonema cf. clevei | 110,000 | |||||
| Gomphonema parvulum | 28,000 | |||||
| Gomphonema cf. rhombicum | 3,600 | |||||
| Gomphonema truncatum capitatum | 1,200 | 2,800 | ||||
| Rhoicospheniaceae | ||||||
| Rhoicosphenia abbreviata | 18,000 | 16,000 | 11,000 | 610,000 | 210,000 | 350,000 |
| Achanthales | ||||||
| Achnanthidiaceae | ||||||
| Achnanthidium exiguum | 560 | |||||
| Achnanthidium minutissimum | 3,500 | 7,800 | 3,700 | 53,000 | ||
| Karayevia clevei | 590 | 560 | ||||
| Planothidium dubium | 1,100 | 7,500 | ||||
| Planothidium lanceolatum | 9,400 | |||||
| Rossithidium pusillum | 1,100 | 19,000 | ||||
| Cocconeidaceae | ||||||
| Cocconeis pediculus | 83,000 | 57,000 | 940,000 | 4,700,000 | 63,000 | 18,000 |
| Cocconeis placentula euglypta | 66,000 | 84,000 | 79,000 | 710,000 | 230,000 | 14,000 |
| Cocconeis placentula lineata | 12,000 | 27,000 | 28,000 | 28,000 | 56,000 | 11,000 |
| Naviculales | ||||||
| Diadesmidaceae | ||||||
| Diadesmis confervacea | 3,600 | |||||
| Luticola mutica | 1,900 | 6,300 | ||||
| Bacillariophyceae | ||||||
| Naviculales | ||||||
| Naviculaceae | ||||||
| Navicula sp. | 29,000 | 1,800 | ||||
| Navicula cincta rostrata | 28,000 | |||||
| Navicula convergens | 560 | |||||
| Navicula cryptocephala veneta | 590 | |||||
| Navicula graciloides | 4,700 | 3,400 | ||||
| Navicula gregaria | 1,200 | 560 | ||||
| Navicula luzonensis | 1,200 | |||||
| Navicula minima | 560 | |||||
| Navicula rhynchocephala germainii | 590 | 1,100 | 37,000 | |||
| Navicula salinarum intermedia | 5,900 | 10,000 | 1,900 | 55,000 | 160,000 | 120,000 |
| Navicula secreta apiculata | 1,100 | 13,000 | ||||
| Navicula symmetrica | 560 | |||||
| Navicula tripunctata | 2,300 | 4,500 | 14,000 | 53,000 | 27,000 | |
| Navicula tripunctata schizonemoides | 590 | |||||
| Navicula viridula | 1,200 | 1,100 | ||||
| Navicula viridula avenacea | 28,000 | 31,000 | ||||
| Sellaphoraceae | ||||||
| Sellaphora pupula | 38,000 | |||||
| Thalassiophysales | ||||||
| Catenulaceae | ||||||
| Amphora ovalis pediculus | 540 | 3,000 | ||||
| Amphora perpusilla | 570 | 26,000 | 6,100 | |||
| Bacillarales | ||||||
| Bacillariaceae | ||||||
| Cymbellonitzschia diluviana | 28,000 | |||||
| Nitzschia amphibia | 2,200 | 110,000 | 170,000 | |||
| Nitzschia bacata | 1,100 | |||||
| Nitzschia dissipata | 22,000 | |||||
| Nitzschia dissipata media | 9,400 | |||||
| Nitzschia frustulum | 4,100 | 1,100 | 69,000 | 16,000 | 12,000 | |
| Nitzschia frustulum perminuta | 19,000 | 13,000 | 14,000 | 110,000 | 79,000 | |
| Nitzschia frustulum subsalina | 4,100 | 4,500 | 7,100 | |||
| Nitzschia kuetzingiana | 590 | 5,600 | 6,300 | |||
| Nitzschia linearis tenuis | 3,100 | |||||
| Nitzschia palea | 1,100 | 25,000 | ||||
| Nitzschia subtilis | 590 | |||||
| Tryblionella debilis | 3,100 | |||||
| Rhopalodiales | ||||||
| Rhopalodiaceae | ||||||
| Epithemia sorex | 13,000 | 3,400 | 7,500 | 7,100 | ||
| Epithemia turgida | 1,200 | |||||
| Rhopalodia gibba | 590 | |||||
| Surirellales | ||||||
| Surirellaceae | ||||||
| Surirella angusta | 6,300 | |||||
| Surirella minuta | 560 | |||||
| CHLOROPHYTA | ||||||
| Unidentified species | 26,000 | 4,900 | ||||
| Chlorophyceae | ||||||
| Volvocales | ||||||
| Chlamydomonadaceae | ||||||
| Chlamydomonas sp. | 3,800 | |||||
| Chlorococcales | ||||||
| Oocystaceae | ||||||
| Ankistrodesmus falcatus | 7,600 | |||||
| Kirchneriella lunaris | 78,000 | |||||
| Scenedesmaceae | ||||||
| Scenedesmus dimorphus | 100,000 | |||||
| Scenedesmus quadricauda | 4,100 | 63,000 | ||||
| Chaetophorales | ||||||
| Chaetophoraceae | ||||||
| Stigeoclonium lubricum | 22,000 | 10,000 | 46,000 | |||
| Oedogoniales | ||||||
| Oedogoniaceae | ||||||
| Oedogonium sp. | 20,000 | 130,000 | 95,000 | 38,000 | ||
| Ulvophyceae | ||||||
| Cladophorales | ||||||
| Cladophoraceae | ||||||
| Cladophora glomerata | 6,000 |