Biogeography and co-occurrence of 16 planktonic species of Keratella Bory de St. Vincent, 1822 (Rotifera, Ploima, Brachionidae) in lakes and reservoirs of the United States Author Tausz, Claudia E. Author Beaver, John R. Author Renicker, Thomas R. Author Klepach, Julia A. Author Pollard, Amina I. Author Mitchell, Richard M. text Zootaxa 2019 2019-07-01 4624 3 337 350 journal article 10.11646/zootaxa.4624.3.3 1175-5326 PMC7265969 31716210 3335854 A251E892-D24D-42C8-BBB8-E76EA3F8CFF1

TABLE 1. Percentage of lakes in which each of the 16 species of Keratella was observed, along with mean percentage of total rotifer biomass (n=1,168 samples), and mean biomass (µg dry weight per liter) in each of the nine ecoregions (Abbreviations: CPL = Coastal Plains, NAP = Northern Appalachians, NPL = Northern Plains, SAP = Southern Appalachians, SPL = Southern Plains, TPL = Temperate Plains, UMW = Upper Midwest, WMT = Western Mountains, XER = Xeric).

			mean biomass (µg d.w. L-1)
	occuring in % of lakes	mean % of total rotifer biomass	CPL	NAP	NPL	SAP	SPL	TPL	UMW	WMT	XER
Keratella cochlearis	90%	6.5%	1.35	0.80	1.84	0.63	0.78	1.52	1.12	0.74	0.28
Keratella crassa	38%	2.1%	0.68	0.84	0.64	0.71	0.81	0.18	0.77	0.62	0.48
Keratella americana	24%	2.4%	2.20	1.00		0.89	2.32	2.43	0.05	0.00	0.82
Keratella tecta	23%	0.2%	0.18	0.03	0.47	0.04	0.26	0.35	0.02	0.94	0.04
Keratella earlinae	17%	0.6%	0.12	0.44	0.09	0.14	0.70	1.87	0.30	0.83	0.09
Keratella quadrata	16%	2.3%	0.01	0.02	3.21		1.07	3.98	5.05	1.72	1.54
Keratella taurocephala	7%	0.6%	0.21	0.39		0.55			0.51	1.84
Keratella tropica	3%	0.2%	4.39		0.31	0.02	3.46	0.98		0.19	0.31
Keratella serrulata	1%	<1%	0.02	0.04						0.33
Keratella quadrata dispersa	<1%	<1%				0.01				1.76	0.50
Keratella testudo	<1%	<1%								32.62	1.18
Keratella valga	<1%	<1%					0.24	0.99		0.01	0.10
Keratella hiemalis	<1%	<1%				0.05		0.32		0.62	0.05
Keratella ticinensis	<1%	<1%
Keratella mixta	<1%	<1%	1.528							0.005
Keratella tropica aspina	<1%	<1%									0.2