Abstract
A seasonal study of two spring-fed stream systems in south-central Texas was undertaken over a 15-month period from June 1996 to September 1997. Relative abundance of the epilithic diatom flora, percent cover of macroalgae, and several physical and chemical conditions were monitored in one 20-m stretch in each of the streams at approximately two-month intervals. Six additional spring-fed stream segments were sampled in May 1996 for macroalgae and measured for the same conditions, in order to determine how representative the macroalgal floras of the study sites were of south-central and western Texas. Conditions in the two stream segments were relatively constant over the 15 months, except for maximum depth; this finding is similar those reported for other spring-fed systems worldwide. Sixty-eight diatom taxa and nine macroalgae taxa were identified from the San Marcos River, which compares to 46 diatom taxa and six macroalgae taxa from the Comal River. Several diatom and macroalgae species were significantly correlated to stream conditions (e.g. Dichotomosiphon tuberosus and Hildenbrandia angolensis with daylength, and Amphora pediculus with maximum depth). Twenty-one macroalgal taxa were identified from the six additional spring-fed steam segments. Conditions in these streams were very similar to those measured in the San Marcos River and Comal River, except that they had a higher average pH x= 8.1 versus x= 7.6). The epilithic diatom flora of the San Marcos River and the Comal River contains many of the diatom and some macroalgal taxa commonly reported from springs globally.
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Cantoral-Uriza, A., J. Carmona-Jiménez & G. Montejano, 1997. Diatoms of calcareous tropical springs in the central region of Mexico. Crypto. Algol. 18: 19–46.
Cazaubon, A. & T. Rolland, 1995. Essai de typologie des peuplements diatomiques des sources (Table Ronde), a trial of a typology of diatom assemblages in springs. Vie Milieu 45: 315–319.
Christensen, C. L., 1978. Observations on the diatom flora from springs along the Balcones Fault, Texas. Phytologia 41: 88–104.
Cole, G. A. and R. L. Watkins, 1977. Hyalella montezuma, a new species (Crustacea: Amphipoda) from Montezuma Well, Arizona. Hydrobiologia 52: 175–184.
Conover, W. J., 1971. Practical Nonparametric Statistics. Wiley-Interscience, N.Y.: 1–462.
Crowe, J. C. and J. M. Sharp, Jr., 1997. Hydrogeologic delineation of habitats for endangered species: the Comal Springs/River system. Envir. Geol. 30: 17–28.
Czarnecki, D. B. & D. W. Blinn, 1979. Observations on southwestern diatoms. II. Caloneis latiuscula var. reimeri n.var., Cyclotella pseudostelligera f. parva n.f. and Gomphonema montezumense n.sp., new taxa from Montezuma Well National Monument. Trans. am. micros. Soc. 98: 110–114.
Duncan, S. W. & D. W. Blinn, 1989. Importance of physical variables on the seasonal dynamics of epilithic algae in a highly shaded canyon stream. J. Phycol. 25: 455–461.
Hambrook, J. A. & R. G. Sheath, 1991. Reproductive ecology of the freshwater red alga Batrachospermum boryanum Sirodot in a temperate headwater stream. Hydrobiologia 218: 233–246.
Holsinger, J. R. & G. Longley, 1980. The subterranean amphipod crustacean fauna of an artesian well in Texas. Smiths. Contr. Zool. 308: 1–61.
Hynes, H. B. N., 1970. The Ecology of Running Waters. Liverpool University Press, Liverpool: 555 pp.
Jandel Scientific, 1994. SigmaStat Statistical Software. San Rafael, CA, U.S.A.
Korch, J. E. & R. G. Sheath, 1989. The phenology of Audouinella violacea (Acrochaetiaceae, Rhodophyta) in a Rhode Island stream (USA). Phycologia 28: 228–236.
Lowe, R. L., 1974. Environmental Requirements and Pollution Tolerance of Freshwater Diatoms. EPA-670, Environmental Monitoring Series, OH: 333 pp.
Nielsen, A., 1950. On the zoology of springs. Hydrobiologia 2: 313–321.
Patrick, R. & C.W. Reimer, 1966. The diatoms of the United States, exclusive of Alaska and Hawaii. Monograph of the Academy of Natural Sciences of Philadelphia, Number 13, Philadelphia: 688 pp.
Rushforth, S. R. & I. Kaczmarska, 1984. New records of diatoms from Blue Lake warm spring, Tooele County, Utah. Gr. Bas. Nat. 44: 120–124.
Rushforth, S. R., L. E. Squires & C. E. Cushing, 1986. Algal communities of springs and streams in the Mt. St. Helens Region, Washington, U.S.A. following the May 1980 eruption. J. Phycol. 22: 129–137.
Sabater, S. & J. R. Roca, 1990. Some factors affecting distribution of diatom assemblages in Pyrenean springs. Freshwat. Biol. 24: 493–507.
Sheath, R. G. & J.M. Burkholder, 1985. Characteristics of softwater streams in Rhode Island II. Composition and seasonal dynamics of macroalgal communities. Hyrdobiologia 128: 109–118.
Sheath, R. G., J. A. Hambrook & C. A. Nerone, 1988. The benthic macro-algae of Georgian Bay, the North Channel and their drainage basin. Hydrobiologia 163: 141–148.
Sheath, R. G., M. L. Vis, J. A. Hambrook & K. A. Cole, 1996. Tundra stream macroalgae of North America: composition, distribution and physiological adaptations. In J. Kristiansen (ed.), Biogeography of Freshwater Algae. Kluwer Academic Publishers, Dordrecht: 67–82.
Starmach, K, 1969. Growth of thalli and reproduction of the red alga Hildenbrandia rivularis (Liebm.) J. Ag. Act. Soc. Bot. Polon. 38: 523–533.
Stern, M. S. and D. H. Stern, 1969. A limnological study of a Tennessee cold spring-brook. Am. Midl. Nat. 82: 62–82.
Vis, M. L. & R. G. Sheath, 1996. Distribution and systematics of Batrachospermum (Batrachospermales, Rhodophyta) in North America. 9. Section Batrachospermum: description of five new species. Phycologia 35: 124–134.
Whitford, L. A., 1956. The communities of algae in the springs and spring streams of Florida. Ecology 37: 433–442.
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Sherwood, A.R., Sheath, R.G. Seasonality of macroalgae and epilithic diatoms in spring-fed streams in Texas, USA. Hydrobiologia 390, 73–82 (1998). https://doi.org/10.1023/A:1003585625978
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DOI: https://doi.org/10.1023/A:1003585625978