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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 13. Algal density in the richest-targeted habitat at sites on the Truckee River: Truckee River at Farad, Calif. (site 12, fig. 1), 1993-96. Habitats sampled were cobble riffles.

[Abbreviations: cells/cm2, cells per square centimeter; sp., species]

Taxon

Reach A,
Sept. 9, 1993
(cells/cm2)
Reach B,
Sept. 9, 1993
(cells/cm2)
Reach C,
Sept. 10, 1993
(cells/cm2)

Reach A,
June 30, 1994
(cells/cm2)

Reach A,
Oct. 2, 1995
(cells/cm2)

Reach A,
Oct. 8, 1996
(cells/cm2)

Total number of cells (rounded)

1,900,000 400,000 4,300,000 8,300,000 2,700,000 2,500,000
CYANOPHYTA            
     Cyanophyceae            
          Chamaesiphonales            
               Chamaesiphonaceae            
                    Chamaesiphon incrustans       4,200    
          Nostocales            
               Nostocaceae            
                    Anabaena sp.       250,000 38,000  
                    Nostoc pruniforme 16,000 31,000 3,700,000      
               Oscillatoriaceae            
                    Hydrocoleum brebissonii       1,100,000 44,000 280,000
                    Lyngbya sp. 1,600,000 240,000 470,000 310,000 220,000 120,000
                    Microcoleus vaginatus 16,000          
                    Oscillatoria sp.       4,000,000 810,000 480,000
                    Schizothrix friesii       17,000    
               Rivulariaceae            
                    Calothrix sp.       1,300,000 740,000  
RHODOPHYTA            
     Florideophyceae            
          Nemaliales            
               Acrochaetiaceae            
                    Audouinella hermanii       14,000    
CRYPTOPHYTA            
                    Undetermined sp.       4,200    
                    Calothrix fusca           95,000
EUGLENOPHYTA            
     Euglenophyceae            
          Euglenales            
               Euglenaceae            
                    Euglena sp.           3,300
                    Trachelomonas sp.     940      
                    Trachelomonas volvocina           6,600
BACILLARIOPHYTA            
     Coscinodiscophyceae            
          Thalassiosirales            
               Stephanodiscaceae            
                    Cyclotella bodanica         7,400  
                    Cyclotella meneghiniana 380   230   5,900 6,200
                    Cyclotella pseudostilligera           6,200
                    Cyclotella radiosa 380   470      
          Melosirales            
               Melosiraceae            
                    Melosira varians 3,800 2,500 470 2,100 10,000 6,200
          Aulacoseirales            
               Aulacoseiraceae            
                    Aulacoseira alpigena       4,300    
                    Aulacoseira ambigua     470 8,500 7,400  
                    Aulacoseira granulata       8,500    
                    Aulacoseira italica       8,500    
     Fragilariophyceae            
          Fragilariales            
               Fragilariaceae            
                    Diatoma mesodon         1,500 4,100
                    Diatoma vulgare     230      
                    Fragilaria capucina     230      
                    Fragilaria capucina mesolepta     230      
                    Fragilaria crotonensis 760   230      
                    Fragilaria exiguiformis     470 4,300 1,500 12,000
                    Fragilaria intermedia         1,500  
                    Fragilaria vaucheriae 5,300 740 1,400 4,300 18,000 21,000
                    Fragilariforma bicapitata         3,000  
                    Hannaea arcus     470      
                    Martyana martyi       2,100    
                    Meridion circulare 380   700      
                    Pseudostaurosira brevistriata         50,000 94,000
                    Fragilaria brevistriata inflata         3,000 39,000
                    Staurosira construens     230 17,000    
                    Fragilaria construens pumila 3,400   3,000 68,000 50,000 88,000
                    Fragilaria construens subsalina 5,300 4,200 3,300      
                    Staurosira construens binodis 2,300   2,100 32,000 3,000  
                    Staurosira construens venter 20,000 9,800 4,700 210,000 27,000 10,000
                    Staurosirella leptostauron       6,400    
                    Staurosirella pinnata 40,000 9,300 14,000 200,000 24,000 99,000
                    Synedra acus       2,100    
                    Synedra mazamaensis 760         4,100
                    Synedra minuscula         1,500  
                    Synedra rumpens 380          
                    Synedra rumpens familiaris   490   8,500   4,100
                    Synedra rumpens fragilarioides         5,900  
                    Synedra ulna       2,100 1,500 6,200
                    Synedra ulna contracta   740 230      
                    Synedra ulna oxyrhynchus       2,100    
          Tabellariales            
               Tabellariaceae            
                    Tabellaria flocullosa           4,100
     Bacillariophyceae            
          Cymbellales            
               Cynbellaceae            
                    Cymbella sp. 3,400       5,900  
                    Cymbella affinis     230 2,100 8,900 12,000
                    Cymbella mexicana janischii 1,900 980 1,900 4,300 7,400  
                    Cymbella naviculiformis         3,000  
                    Cymbella turgidula           3,000
                    Encyonema minutum 16,000 15,000 17,000 10,000 52,000 45,000
                    Encyonema muelleri 12,000 6,700 14,000 120,000 7,400 4,100
                    Encyonema silesiacum 2,300 5,200     7,400 4,100
                    Reimeria sinuata 5,000 5,900 4,700 15,000 25,000 57,000
                    Reimeria sinuata antiqua       4,300    
               Gomphonemataceae            
                    Gomphoneis eriense variabilis   490 930 4,300 13,000  
                    Gomphoneis herculeana 5,000     8,500 3,000  
                    Gomphoneis olivacea       11,000    
                    Gomphonema sp. 1,900 2,500 940 15,000 16,000  
                    Gomphonema angustatum         3,000  
                    Gomphonema cf. clevei 740 700 680 4,000 10,000 24,000
                    Gomphonema parvulum 380 490   6,400 5,900 8,200
                    Gomphonema cf. rhombicum           27,000
                    Gomphonema truncatum capitatum 380          
               Rhoicospheniaceae            
                    Rhoicosphenia abbreviata 1,500 5,700 2,100 15,000 46,000 49,000
          Achanthales            
               Achnanthidiaceae            
                    Achnanthidium minutissimum 4,200 1,700 2,600 8,500 120,000 140,000
                    Karayevia clevei 380 250     1,500  
                    Planothidium dubium 1,900 250 470   4,400 4,100
                    Planothidium lanceolatum 380 740     18,000 4,100
                    Planothidium peragallii 380          
                    Rossithidium pusillum 1,500 490 230 2,100 4,400 14,000
               Cocconeidaceae            
                    Cocconeis pediculus 380   230 130,000    
                    Cocconeis placentula euglypta 16,000 18,000 13,000 8,500 43,000 86,000
                    Cocconeis placentula lineata 6,100 5,400 1,900 8,500 12,000 16,000
          Naviculales            
               Amphipleuraceae            
                    Frustulia rhomboides crassinervia       2,100    
               Brachysiraceae            
                    Brachysira brebissonii       4,300    
               Cavinulaceae            
                    Cavinula cocconeiformis       2,100    
               Diploneidaceae            
                    Diploneis puella           4,100
                    Diploneis smithii       2,100    
               Naviculaceae            
                    Fistulifera pelliculosa 380          
                    Geissleria decussis 1,200         9,800
                    Hippodonta capitata 760     6,400 3,000  
                    Navicula sp.         61,000 33,000
                    Navicula anglica       4,300    
                    Navicula canoris 1,100          
                    Navicula cari       2,100    
                    Navicula cryptocephala       2,100    
                    Navicula detenta 760     4,300    
                    Navicula graciloides 5,700 8,600 6,800      
                    Navicula gregaria         5,900  
                    Navicula lanceolata   490        
                    Navicula menisculus 760   1,200     4,100
                    Navicula minima 380 250       8,200
                    Navicula pseudolanceolata         10,000  
                    Navicula radiosa 380   230      
                    Navicula rhynchocephala germainii           4,100
                    Navicula salinarum intermedia 15,000 19,000 18,000   18,000 12,000
                    Navicula secreta apiculata 380 740 930   5,900 16,000
                    Navicula tantula 380          
                    Navicula tripunctata 3,800 5,900 9,600 21,000 30,000 33,000
                    Navicula tripunctata schizonemoides       2,100    
                    Navicula viridula avenacea         1,500  
               Neidiaceae            
                    Neidium affine           4,100
                    Neidium dubium           4,100
               Pinnulariaceae            
                    Caloneis bacillum     230 2,100    
               Sellaphoraceae            
                    Sellaphora bacillum       4,300    
                    Sellaphora laevissima     230      
                    Sellaphora pupula   490   2,100    
                    Sellaphora pupula rectangularis 760     4,300 3,000  
          Thalassiophysales            
               Catenulaceae            
                    Amphora ovalis 380          
                    Amphora ovalis pediculus     230 2,100 1,500  
                    Amphora perpusilla 1,100         14,000
          Bacillarales            
               Bacillariaceae            
                    Cymbellonitzschia diluviana 760 490 230      
                    Denticula elegans       2,100    
                    Hantzschia virgata         1,500  
                    Nitzschia amphibia 380 250 700   3,000  
                    Nitzschia bacata           4,100
                    Nitzschia dissipata 760   1,400 4,300 44,000 25,000
                    Nitzschia dissipata media 1,900 250     8,900 16,000
                    Nitzschia frustulum 14,000 5,200 4,400 55,000 16,000 25,000
                    Nitzschia frustulum perminuta 7,600 4,400 1,200 19,000 21,000 49,000
                    Nitzschia frustulum subsalina 1,900 490 930 8,500 8,900 8,200
                    Nitzschia kuetzingiana 380 490   13,000 5,900  
                    Nitzschia linearis tenuis   250 470     18,000
                    Nitzschia palea         1,500  
                    Nitzschia pura         1,500  
                    Nitzschia recta   740        
                    Nitzschia romana   250     1,500  
                    Nitzschia sinuata tabellaria 760          
                    Nitzschia sociabilis           4,100
                    Nitzschia tropica 1,500     4,300    
               Rhopalodiaceae            
                    Epithemia adnata       8,500    
                    Epithemia sorex 760   230 110,000 2,900 29,000
                    Epithemia turgida   1,500   15,000    
                    Rhopalodia gibba 380     6,400    
                    Rhopalodia gibba ventricosa       2,100    
CHLOROPHYTA            
                    Undetermined sp.       4,200    
     Chlorophyceae            
          Chlorococcales            
               Oocystaceae            
                    Ankistrodesmus falcatus       4,200   6,600
               Scenedesmaceae            
                    Scenedesmus ecornis   880        
                    Scenedesmus quadricauda   8,800        
          Chaetophorales            
               Chaetophoraceae            
                    Schizomeris leibleinii           79,000
                    Stigeoclonium lubricum           200,000
     Charophyceae            
          Zygnemateles            
               Desmidiaceae            
                    Cosmarium subcrenatum 670          

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