USGS Open-File Report 02-012 -- Table 19

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 19. Algal density in depositional-targeted habitat at sites on the Truckee River: Truckee River at Mayberry Drive below Lawton, Nev. (site 13, fig. 1), Truckee River at Idlewild Park at Reno, Nev. (site 14, fig. 1), and Truckee River near Sparks, Nev. (site 15, fig. 1), 1994-95. Habitats sampled were sediment from pools.

[Abbreviations and symbols: cells/cm², cells per square centimeter; sp., species; --, not applicable]

Taxon	Site 13			Site 14		Site 15
Taxon	July 1, 1994 (cells/cm²)		Sept. 21, 1995 (percent)	July 5, 1994 (cells/cm²)	Sept. 22, 1995 (percent)	June 29, 1994 (cells/cm²)	Sept. 25, 1995 (percent
Total number of cells (rounded)	3,000,000		--	1,700,000	--	2,400,000	--
CYANOPHYTA
Undetermined species						5,500
Cyanophyceae
Chroococcales
Chroococcaceae
Merismopedia glauca					6.1
Nostocales
Nostocaceae
Anabaena sp.							1.3
Oscillatoriaceae
Oscillatoria sp.	100,000		2.9
CRYPTOPHYTA
Cryptophyceae
Cryptomonadales
Cryptomonadaceae
Cryptomonas sp.					0.3
EUGLENOPHYTA
Euglenophyceae
Euglenales
Euglenaceae
Euglena sp.	5,900					5,500
Trachelomonas cylindrica							0.3
Trachelomonas hispida							0.3
BACILLARIOPHYTA
Coscinodiscophyceae
Thalassiosirales
Stephanodiscaceae
Cyclotella meneghiniana	55,000		0.6	16,000	1.2	13,000	0.3
Cyclotella pseudostelligera			0.3			7,800	0.3
Cyclotella radiosa			0.8		0.3
Melosirales
Melosiraceae
Melosira varians	4,600		2.1		0.9	7,800	0.5
Aulacosirales
Aulacoseiraceae
Aulacoseira ambigua			0.2	5,200	0.3
Aulacoseira italica					0.6	15,000	0.2
Fragilariophyceae
Fragilariales
Fragilariaceae
Asterionella formosa	4,600						0.3
Diatoma mesodon			0.3
Diatoma tenue elongatum						7,800
Diatoma vulgare	41,000					8,100	1.3
Fragilaria vaucheriae	64,000		1.5	21,000	2.4	23,000	0.3
Martyana martyi	9,200		0.3		0.3	7,800
Pseudostaurosira brevistriata	18,000		2.1		0.8	35,000	4.2
Fragilaria brevistriata inflata	9,200			10,000			0.3
Staurosira construens				5,200
Fragilaria construens pumila	150,000		2.7	31,000	0.3	81,000	1.6
Staurosira construens venter	400,000		6.8	220,000	3.5	240,000	3.3
Staurosirella leptostauron			0.3	5,200		3,900
Staurosirella pinnata	390,000		2.1	360,000	4.1	370,000	3.3
Synedra mazamaensis	46,000			16,000		62,000
Synedra minuscula			0.3
Synedra rumpens				10,000			0.3
Synedra rumpens familiaris						7,800
Synedra rumpens fragilarioides					0.3
Synedra rumpens meneghiniana		9,200	0.3
Synedra tenera	9,200
Synedra ulna							0.5
Synedra ulna oxyrhynchus			0.3		0.3
Cymbellales
Cymbellaceae
Cymbella affinis					0.9		0.3
Cymbella brehmii					0.3
Cymbella mexicana janischii				7,800			0.7
Cymbella naviculiformis							0.3
Cymbella tumida					0.3
Cymbella turgidula							0.7
Encyonema minutum	120,000		8.7	42,000		50,000	3.3
Encyonema muelleri	60,000			26,000		27,000
Encyonema prostratum					0.3
Encyonema silesiacum	9,200		2.1		0.6		2.0
Reimeria sinuata	74,000		1.9	10,000	3.3	23,000	2.9
Reimeria sinuata antiqua	9,200			5,200
Gomphonemataceae
Gomphoneis eriense					0.6
Gomphoneis eriense variabilis	9,200
Gomphoneis herculeana	18,000		0.8	5,200	0.6		0.7
Gomphoneis olivacea						15,000
Gomphonema sp.	18,000		3.7	16,000	0.9	47,000	1.3
Gomphonema angustatum					0.2
Gomphonema grunowii	9,200
Gomphonema intricatum	9,200				0.3
Gomphonema parvulum			1.0		0.9	7,700	0.3
Rhoicospheniaceae
Rhoicosphenia abbreviata	28,000		4.2	65,000		16,000	3.3
Achanthales
Achnanthidiaceae
Achnanthes grana			0.3
Achnanthes pinnata			0.2
Achnanthidium minutissimum	100,000		13.4	49,000	9.3	290,000	16.0
Karayevia clevei	9,200		1.5	13,000	0.3	23,000
Planothidium dubium			0.3	5,200	0.9	23,000
Planothidium lanceolatum	18,000		0.6		0.9
Rossithidium pusillum	9,200		1.3		0.6	7,800	0.3
Cocconeidaceae
Cocconeis pediculus	4,600			10,000		7,800	0.3
Cocconeis placentula euglypta	100,000		5.5	81,000	7.4	62,000	2.3
Cocconeis placentula lineata	18,000		2.3	5,200	0.9		1.0
Naviculales
Cavinulaceae
Cavinula pseudoscutiformis	9,200
Diadesmidaceae
Luticola cohnii	9,200
Diploneidaceae
Diploneis elliptica				2,600
Naviculaceae
Geissleria decussis	9,200		0.3	18,000	0.3		1.0
Geissleria schoenfeldii	9,200			5,200
Mayamaea atomus			0.3
Hippodonta capitata	9,200		1.8	10,000	0.9		3.3
Navicula sp.			2.6		0.9		1.0
Navicula arvensis	23,000					15,000
Navicula cari	60,000			42,000		16,000
Navicula clementis				5,200
Navicula cryptocephala						7,800	0.3
Navicula cryptocephala veneta						7,800
Navicula genovefae						7,800	1.8
Navicula gibbosa							0.3
Navicula gregaria	28,000			34,000	0.5		1.0
Navicula menisculus				10,000	0.6	23,000
Navicula minima	28,000		1.0			16,000
Navicula rhynchocephala germainii					0.3		0.7
Navicula salinarum intermedia	28,000		4.4	49,000	4.4	47,000	6.0
Navicula secreta apiculata	23,000		0.3	18,000	1.8	7,800	1.3
Navicula tripunctata	28,000		1.1	52,000	0.3	8,100	1.0
Navicula viridula avenacea	18,000			16,000	0.3	39,000	0.7
Pinnulariaceae
Caloneis bacillum				10,000
Caloneis ventricosa truncatula	9,200
Pinnularia lundii							0.3
Sellaphoraceae
Sellaphora mutata							0.3
Sellaphora pupula	28,000				0.3	7,900	5.2
Sellaphora pupula capitata							0.7
Sellaphora pupula rectangularis							2.9
Sellaphora seminulum					0.3
Thalassiophysales
Catenulaceae
Amphora ovalis
Amphora ovalis pediculus							2.1
Amphora perpusilla	9,200		1.6	18,000	1.7	31,000	1.0
Bacillarales
Bacillariaceae
Cymbellonitzschia diluviana	28,000					7,700
Hantzschia amphioxys			0.2
Nitzschia acicularis							0.3
Nitzschia amphibia	18,000			5,200		78,000	0.3
Nitzschia bacata	9,200		0.3
Nitzschia dissipata	46,000		5.0	10,000	3.0	23,000	2.6
Nitzschia dissipata media			2.1		1.8		2.0
Nitzschia frustulum	110,000		0.6	65,000	1.2	160,000	2.3
Nitzschia frustulum perminuta	200,000		1.3	86,000	3.8	150,000	4.9
Nitzschia frustulum subsalina	28,000		2.6	10,000	2.7	35,000	1.0
Nitzschia kuetzingiana	130,000		1.0	52,000	2.6	110,000	0.7
Nitzschia linearis						15,000
Nitzschia linearis tenuis	4,600		0.3
Nitzschia palea				5,200	0.3	19,000	0.7
Nitzschia romana			0.3
Nitzschia sinuata delognei			0.2
Nitzschia subtilis	9,200			5,200
Surirellales
Surirellaceae
Surirella angusta	9,200		0.5		0.6
Surirella minuta			0.2
CHLOROPHYTA
Undetermined species	5,900			9,700		16,000
Chlorophyceae
Volvocales
Chlamydomonadaceae
Chlamydomonas sp.							0.3
Chloroccales
Oocystaceae
Ankistrodesmus falcatus					0.3	5,500
Scenedesmaceae
Coelastrum microporum					1.5
Scenedesmus acutus				30,000	1.6
Scenedesmus denticulatus	55,000			30,000
Scenedesmus dimorphus				13,000
Scenedesmus quadricauda	48,000
Charophyceae
Zygnemateles
Desmidiaceae
Closterium leibleinii			0.3

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