Abbott, P.L., 1975, On the hydrology of the Edwards Limestone, south-central Texas: Journal of Hydrology, v. 24, p. 251–269.
______1977, Effect of Balcones faults on groundwater movement, south-central Texas: Texas Journal of Science, v. 29, no. 1–2, p. 514.
Allan, J.D., and Flecker, A.S., 1993, Biodiversity conservation in running waters: BioScience, v. 43, no. 1, p. 32–43.
Anderson, A.A., Hubbs, C., Winemiller, K.O., and Edwards, R.J., 1995, Texas freshwater fish assemblages following three decades of environmental change: The Southwestern Naturalist, v. 40, no. 3, p. 314–321.
Anderson, J.R., 1970, Major land uses, in The national atlas of the United States: Washington, D.C., U.S. Geological Survey, pls. 158–159.
Angerstein, M.B., and Lemke, D.E., 1994, First records of the aquatic weed Hygrophila polysperma (Acanthaceae) from Texas: Sida, v. 16, no. 2, p. 365–371.
Ashworth, J.B., and Hopkins, Janie, 1995, Aquifers of Texas: Texas Water Development Board Report 345, 69 p.
Barker, R.A., and Ardis, A.F., 1996, Hydrogeologic framework of the Edwards-Trinity aquifer system, west-central Texas: U.S. Geological Survey Professional Paper 1421–B, 61 p.
Barr, C.B., and Spangler, P.J., 1992, A new genus and species of stygobiontic dryopid beetle, Stygoparnus comalensis (Coleoptera: Dryopidae), from Comal Springs, Texas: Proceedings of the Biological Society of Washington, v. 105, no. 1, p. 40–54.
Barr, T.C., Jr., and Holsinger, J.R., 1985, Speciation in cave faunas: Annual Review of Ecological Systematics, v. 16, p. 313–337.
Barra, T.C., 1976, The effects of a heated effluent on the species diversity of benthic macroinvertebrates in Calaveras Lake, a central Texas reservoir: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 70 p.
Bayer, C.W., 1975, The dragonfly nymphs (Odonata: Anisoptera) of the Guadalupe River Basin, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 117 p.
Bayer, C.W., Davis, J.R., Twidwell, S.R., Kleinsasser, Roy, Linam, Gordon, Mayes, Kevin, and Hornig, Evan, 1992, Texas Aquatic Ecoregion Project—An assessment of least disturbed streams: Austin, Tex., Draft report for Texas Water Commission, 406 p.
Blair, W.F., 1950, The biotic provinces of Texas: Texas Journal of Science, v. 2, no. 1, p. 93–117.
Bosse, L.S., Tuff, D.W., and Brown, H.P., 1988, A new species of Heterelmis from Texas (Coleoptera: Elmidae): The Southwestern Naturalist, v. 33, no. 2, p. 199–203.
Bowles, D.E., 1994, A preliminary checklist of the caddisflies (Insecta: Trichoptera) of Comal Springs, Texas: Austin, Tex., Texas Parks and Wildlife Department, Resource Protection Division, Endangered Resources Branch, 9 p.
______1995, A new species of Austrotinodes (Trichoptera: Ecnomidae) from Texas: Journal of the New York Entomological Society, v. 103, no. 2, p. 155–161.
Bowles, D.E., and Arsuffi, T.L., 1993, Karst aquatic ecosystems of the Edwards Plateau region of central Texas, USA–A consideration of their importance, threats to their existence, and efforts for their conservation: Aquatic Conservation, Marine and Freshwater Ecosystems, v. 3, p. 317–329.
Bowles, D.E., and Flint, O.S., Jr., 1997, The genus Phylloicus Muller (Trichoptera: Calamoceratidae) in the United States, with a redescription of Phylloicus ornatus (Banks): Proceedings of the International Symposium on Trichoptera, 1997, p. 53–58.
Bowles, D.E., and Short, R.A., 1988, Size composition of invertebrate drift and fish predation in a Texas stream: The Southwestern Naturalist, v. 33, no. 2, p. 177–184.
Bowles, D.E., and Stanford, R., 1997, A new distributional record for Haideoporus texanus (Coleoptera: Dytiscidae), a stygobiontic beetle from the Edwards aquifer, Texas: Entomological News, v. 108, no. 4, p. 297–299.
Bowman, James, and Jensen, D.A., 1977, Intensive surface water monitoring survey for segment no. 2101—Nueces River tidal: Austin, Tex., Texas Water Quality Board, Field Operations Division, Report IMS–53, 29 p.
Bowman, T.E., and Longley, Glenn, 1976, Redescription and assignment to the new genus Lirceolus of the Texas troglobitic water slater, Asellus smithii (Ulrich) (Crustacea: Isopoda: Asellidae): Proceedings of the Biological Society of Washington, v. 88, no. 45, p. 489–496.
Boyd, C.E., 1970, Vascular aquatic plants for mineral nutrient removal from polluted waters: Economic Botany, v. 24, no. 1, p. 95–103.
Bradsby, D.D., 1994, A recreational use survey of the San Marcos River: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 82 p.
Brown, W.H., 1953, Introduced fish species of the Guadalupe River Basin: Texas Journal of Science, v. 5, no. 2, p. 245–251.
Browning, L.A., 1977, Source of nitrate in water of the Edwards aquifer, south-central Texas: Austin, Tex., University of Texas, M.S. thesis, 89 p.
Brune, Gunnar, 1981, Springs of Texas: Fort Worth, Tex., Branch-Smith, Inc., v. 1, 566 p.
Buzan, D., 1982a, Intensive survey of Cibolo Creek, segment 1902: Austin, Tex., Texas Department of Water Resources, Water Quality Assessment Unit, Report IS–39, 56 p.
______1982b, Intensive survey of Salado Creek, segment 1910: Austin, Tex., Texas Department of Water Resources, Water Quality Assessment Unit, Report IS–42, 48 p.
Campbell, Linda, 1995, Endangered and threatened animals of Texas: Austin, Tex., University of Texas Press, 130 p.
Carpenter, S.R., and Lodge, D.M., 1986, Effects of submersed macrophytes on ecosystem processes: Aquatic Botany, v. 26, p. 341–370.
Coastal Ecosystems Management, Inc., 1975, Evaluation of impacts of a no-management plan on the San Antonio-Guadalupe River Basin: Fort Worth, Tex., Coastal Ecosystems Management, Inc., 445 p.
Cover, L.W., 1980, The drift ecology of the Ephemeroptera (mayflies) in a spring-fed river: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 94 p.
Crowe J.C., and Sharp, J.M., Jr., 1997, Hydrogeologic delineation of habitats for endangered species—The Comal Springs/River system: Berlin, Environmental Geology, v. 30, no. 1–2, p. 17–33.
Cuffney, T.F., Meador, M.R., Porter, S.D., and Gurtz, M.E., 1997, Distribution of fish, benthic invertebrate, and algal communities in relation to physical and chemical conditions, Yakima River Basin, Washington, 1990: U.S. Geological Survey Water-Resources Investigations Report 96–4280, 94 p.
Dallas Morning News, Inc., 1997, 1998–1999 Texas almanac: College Station, Tex., Texas A&M Press, 672 p.
Davis, J.B., 1980, A comparison of growth of largemouth bass from selected areas of Canyon Reservoir, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 47 p.
Davis, J.R., 1975, The ecology of the helminth parasites of Gambusia affinis and Gambusia geiseri (Osteichthyes: Poecillidae) in the area of San Marcos, Texas: Guadalupe-Blanco River Authority, Report 101, 161 p.
______1982, Macrobenthic diversity of Cibolo Creek, an interrupted, south-central Texas stream, in Davis, J.R., ed., Proceedings of the Symposium on Recent Benthological Investigations in Texas and Adjacent States: Texas Academy of Sciences, Aquatic Sciences Section, p. 79–94.
Davis, W.S., Snyder, B.D., Stribling, J.B., and Stoughton, C., 1996, Summary of State biological assessment programs for streams and wadeable rivers: Washington, D.C., U.S. Environmental Protection Agency, Office of Policy, Planning and Evaluation, EPA 230–R–96–007.
De La Cruz, A.T., 1978, Intensive surface water monitoring survey for segment 2105—Nueces River: Austin, Tex., Texas Department of Water Resources, Report IMS–74, 34 p.
______1994, Water quality and biological evaluation—Leon Creek segment 1906: Austin, Tex., Texas Natural Resource Conservation Commission, Report AS–28, 62 p.
Devall, L.L., 1940, A comparative study of plant dominance in a spring-fed lake: San Marcos, Tex., Southwest Texas State University, M.A. thesis, 49 p.
Edwards, R.J., Longley, Glenn, Moss, Randy, Ward, John, Matthews, Ray, and Stewart, Bruce, 1989, A classification of Texas aquatic communities with special consideration toward the conservation of endangered and threatened taxa: Texas Journal of Science, v. 41, no. 3, p. 231–240.
Edwards, S.W., 1973, Texas caddisflies: Texas Journal of Science, v. 24, no. 4, p. 491–516.
Epperson, C.R., and Short, R.A., 1987, Annual production of Corydalus cornutus (Megaloptera) in the Guadalupe River, Texas: American Midland Naturalist, v. 118, no. 2, p. 433–438.
Espey, Huston and Associates, Inc., 1983, San Antonio River aquatic biological study: Austin, Tex., Document 83688, EH&A Job 2827, 62 p.
Ezell, C.E., 1982, Intensive survey of Cibolo Creek, segment 1908: Austin, Tex., Texas Department of Water Resources, Water Quality Assessment Unit, Report IS–37, 42 p.
Findeisen, J.A., 1997, An assessment of fishes, biotic integrity, and fish habitat utilization in the lower San Antonio River: San Marcos, Tex., Southwest Texas State University, M.S. thesis.
Follett, C.R., 1956, Records of water-level measurements in Bexar County, Texas: Texas Board of Water Engineers Bulletin 5606, 60 p.
Fullington, R.W., 1982, The recent and fossil freshwater gastropod fauna of Texas, in Davis, J.R., ed., Proceedings of the Symposium on Recent Benthological Investigations in Texas and adjacent states: Texas Academy of Science, Aquatic Sciences Section, p. 61–67.
Gandara, S.C., Gibbons, W.J., Andrews, F.L., Fisher, J.C., Hinds, B.A., and Jones, R.E., 1995, Water resources data, Texas, water year 1994—v. 3: U.S. Geological Survey Water-Data Report TX–94–3, 475 p.
Gandara, S.C., Gibbons, W.J., Andrews, F.L., Jones, R.E., and Barbie, D.L., 1998, Water resources data, Texas, water year 1997—v. 3: U.S. Geological Survey Water-Data Report TX–97–3, 414 p.
Garrett, G.P., 1991, Guidelines for the management of Guadalupe bass: Ingram, Tex., Texas Parks and Wildlife, Inland Fisheries Branch, 52 p.
Garza, Sergio, 1962, Recharge, discharge, and changes in ground-water storage in the Edwards and associated limestones, San Antonio area, Texas—A progress report on studies, 1955–59: Texas Board of Water Engineers Bulletin 6201, 42 p.
______1966, Ground-water recharge to the Edwards and associated limestones, San Antonio area, Texas, 1964: San Antonio, Tex., Edwards Underground Water District Bulletin 9, 2 p.
Gilliom, R.J., Alley, W.M., and Gurtz, M.E., 1995, Design of the National Water-Quality Assessment Program—Occurrence and distribution of water-quality conditions: U.S. Geological Survey Circular 1112, 33 p.
Ging, P.B., Judd, L.J., and Wynn, K.H., 1997, Water-quality assessment of south-central Texas—Occurrence and distribution of volatile organic compounds in surface water and ground water, 1983–94, and implications for future monitoring: U.S. Geological Survey Water-Resources Investigations Report 97–4028, 20 p.
Gonzales, M., 1988, An examination of the biotic integrity of the upper San Antonio River based on fish community attributes: San Marcos, Tex., Southwest Texas State University, M.S. thesis.
Gould, F.W., 1975, Texas plants—A checklist and ecological summary: College Station, Tex., Texas A&M University, Texas Agricultural Experiment Station, MP–585, 121 p.
Gregg, W.G., and Rose, F.L., 1982, The effects of aquatic macrophytes on the stream microenvironment: Aquatic Botany, v. 14, p. 309–324.
Hershler, Robert, and Longley, Glenn, 1986a, Hadoceras taylori, a new genus and species of phreatic Hydrobiidae (Gastropoda: Rissoacea) from south-central Texas: Proceedings of the Biological Society of Washington, v. 99, no. 1, p. 121–136.
______1986b, Phreatic hydrobiids (Gastropoda: Prosobranchia) from the Edwards (Balcones fault zone) aquifer region, south-central Texas: Malacologia, v. 27, no. 1, p. 127–172.
______1987, Phreatodrobia coronae, a new species of cavesnail from southwestern Texas: The Nautilus, v. 101, no. 3, p. 133–139.
Hobbs, H.H., Jr., and Hobbs, H.H., III, 1995, Procambarus (Ortmannicus) nueces (Decapoda: Cambaridae), a new crayfish from the Nueces River Basin, Texas: Proceedings of the Biological Society of Washington, v. 108, no. 1, p. 54–60.
Holsinger, J.R., 1988, Troglobites—The evolution of cave-dwelling organisms: American Scientist, v. 76, p. 146–153.
Holsinger, J.R., and Longley, Glenn, 1980, The subterranean amphipod crustacean fauna of an artesian well in Texas: Smithsonian Contributions to Zoology, no. 308, 62 p.
Hornig, C.E., 1984, Macroinvertebrate inventories of the White River, Colorado and Utah—Significance of annual, seasonal, and spatial variation in the design of biomonitoring networks for pollution detection: Las Vegas, Nev., U.S. Environmental Protection Agency, EPA–600/S7–84–063, 4 p.
Hornig, C.E., Bayer, C.W., Twidwell, S.R., Davis, J.R., Kleinsasser, R.J., Linam, G.W., and Mayes, K.B., 1995, Development of regionally based biological criteria in Texas, in Davis, W.S., and Simon, T.P., eds., Biological assessment and criteria—Tools for water resource planning and decision making: CRC Press, 415 p.
Howells, R.G., 1997, Distributional surveys of freshwater bivalves in Texas—Progress report for 1996: Austin, Tex., Texas Parks and Wildlife Department, Inland Fisheries Division, Management Data Series 144, 52 p.
Hubbs, Clark, 1957, Distributional patterns of Texas freshwater fishes: The Southwestern Naturalist, v. 2, no. 2–3, p. 89–104.
______1995, Springs and spring runs as unique aquatic systems: Copeia, v. 4, p. 989–991.
Hubbs, Clark, Edwards, R.J., and Garrett, G.P., 1991, An annotated checklist of the freshwater fishes of Texas, with keys to identification of species: Texas Journal of Science, Special Supplement, v. 43, p. 1–56.
Hubbs, Clark, Kuehne, R.A., and Ball, J.C., 1953, The fishes of the upper Guadalupe River, Texas: Texas Journal of Science, v. 5, no. 2, p. 216–244.
Hynes, H.B.N., 1960, The biology of polluted waters: Liverpool University Press, 202 p.
______1970, The ecology of running waters: University of Toronto Press, 555 p.
Jasper, S.K., and Vogtsberger, R.C., 1996, First Texas records of five genera of aquatic beetles (Coleoptera: Noteridae, Dytiscidae, Hydrophilidae) with habitat notes: Entomological News, v. 107, no. 1, p. 49–60.
Kane, S., 1995, Effects of a textile mill effluent and a low water dam on benthic macroinvertebrate community structure of the Guadalupe River in Comal County, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 65 p.
Karr, J.R., 1995, Protecting aquatic ecosystems—Clean water is not enough, in Davis, W.S., and Simon, T.P., eds., Biological assessment and criteria—Tools for water resource planning and decision making: CRC Press, p. 7–13.
Kastning, E.H., 1983, Relict caves as evidence of landscape and aquifer evolution in a deeply dissected carbonate terrain—Southwest Edwards Plateau, Texas, U.S.A., in Back, William, and LaMoreaux, P.E., eds., V.T. Stringfield Symposium, Processes in Karst Hydrology: Journal of Hydrology, v. 61, p. 89–112.
Kelsey, T., 1997, Fish community structure and water quality assessment (index of biotic integrity) of the San Marcos River, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 98 p.
Kent, D.H., 1971, The effects of a deep storage reservoir on the benthic macroinvertebrate community: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 75 p.
Lang, J.W., 1954, Ground-water resources of the San Antonio area, Texas—A progress report of current studies: Texas Board of Water Engineers Bulletin 5412, 30 p.
Langecker, T.G., and Longley, Glenn, 1993, Morphological adaptations of the Texas blind catfishes Trogloglanis pattersoni and Satan eurystomus (Siluriformes: Ictaluridae) to their underground environment: Copeia, v. 93, no. 4, p. 976–986.
Lemke, D.E., 1989, Aquatic macrophytes of the upper San Marcos River, Hays County, Texas: The Southwestern Naturalist, v. 34, no. 2, p. 289–291.
Lewis, J.J., 1983, The assignment of the Texas troglobitic water slater Caecidotea pilus to the genus Lirceolus, with an amended diagnosis of the genus (Crustacea: Isopoda: Asellidae): Proceedings of the Biological Society of Washington, v. 96, no. 1, p. 145–148.
Lewis, J.J., and Bowman, T.E., 1996, The subterranean asellids of Texas (Crustacea: Isopoda: Asellidae): Proceedings of the Biological Society of Washington, v. 109, no. 3, p. 482–500.
Lindholm, J.J.T., 1979, The gastropods of the upper San Marcos River and their trematode parasites: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 73 p.
Livingston, P.P., 1947, Ground-water resources of Bexar County, Texas: Texas Board of Water Engineers Miscellaneous Publication, 240 p.
Longley, Glenn, 1981, The Edwards aquifer—Earth's most diverse groundwater ecosystem: International Journal of Speleology, v. 11, no. 1–2, p. 123–128.
______1986, The biota of the Edwards aquifer and the implications for paleozoogeography, in Abbott, P.L., and Woodruff, C.M., Jr., The Balcones escarpment—Geology, hydrology, ecology, and social development in central Texas: San Antonio, Tex., Annual Meeting, Geological Society of America, p. 51–54.
______1992, The subterranean aquatic ecosystem of the Balcones fault zone Edwards aquifer in Texas—Threats from overpumping, in First International Conference on Ground Water Ecology, Tampa, Fla., Proceedings: Bethesda, Md., U.S. Environmental Protection Agency, American Water Resources Association, p. 291–300.
Longley, Glenn, Cox, K., Phillips, G., and Miller, J., 1996, Environmental study of proposed diversion sites G–10 and G–14 on the Guadalupe River: San Marcos, Tex., Southwest Texas State University, Edwards Aquifer Research and Data Center, Texas Water Development Board Contract 95–483–113.
Maclay, R.W., and Rettman, P.L., 1973, Regional specific yield of the Edwards aquifer and associated limestones in the San Antonio, Texas, area: U.S. Geological Survey Open-File Report 73–172, 14 p. [Also published as Edwards Underground Water District Report, 10 p., 1973.]
Maclay, R.W., and Small, T.A., 1976, Progress report on geology of the Edwards aquifer, San Antonio area, Texas, and preliminary interpretation of borehole geophysical and laboratory data on carbonate rocks: U.S. Geological Survey Open-File Report 76–627, 65 p.
Menard, J.A., 1995, Bibliography of the Edwards aquifer, Texas, through 1993: U.S. Geological Survey Open-File Report 95–336, 75 p.
Mench, P.A., 1978, Diagenesis related to Miocene faulting in the Edwards aquifer, San Antonio area, Texas: Geological Society of America, Abstracts with Program (South Central Section), v. 10, no. 1, p. 22.
Miller, R.R., Williams, J.D., and Williams J.E., 1989, Extinctions of North American fishes during the past century: Fisheries, v. 14, no. 6, p. 22–38.
Neck, R.W., 1984, Occurrence of the striped ramshorn snail, Marisa cornuarietis, in central Texas (Ampullariidae): Nautilus, v. 98, no. 3, p. 119–120.
Nelson, J.N., 1993, Population size, distribution, and life history of Eurycea nana in the San Marcos River: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 73 p.
Obenoskey, J.R., 1997, Distribution, abundance and feeding preferences of the crayfish, Procambarus clarkii, in Landa Lake, Comal County, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 23 p.
Omernik, J.M., 1987, Ecoregions of the conterminous United States: Annals of the Association of American Geographers, v. 77, scale 1:7,500,000, p. 118–125.
Ono, R.D., Williams, J.D., and Wagner, Anne, 1983, Vanishing fishes of North America: Washington, D.C., Stone Wall Press, Inc., 257 p.
Owen, J.M., 1996, Seasonal and longitudinal changes in functional feeding group composition of benthic macroinvertebrates in the San Marcos River, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 30 p.
Pearson, F.J., Jr., and Rettman, P.L., 1976, Geochemical and isotopic analyses of waters associated with the Edwards Limestone aquifer, central Texas: San Antonio, Tex., Edwards Underground Water District Report, 35 p.
Pearson, F.J., Jr., Rettman, P.L., and Wyerman, T.A., 1975, Environmental tritium in the Edwards aquifer, central Texas, 1963–71: U.S. Geological Survey Open-File Report 74–362, 36 p.
Petitt, B.M., Jr., and George, W.O., 1956, Ground-water resources of the San Antonio area, Texas: Texas Board of Water Engineers Bulletin 5608, v. 1, 85 p.; v. 2, pt. 1, 255 p.; pt. 2, 288 p.; pt. 3, 231 p.
Poulson, T.L., and White, W.B., 1969, The cave environment: Science, v. 165, no. 3897, p. 971–981.
Power, Paula, 1996, Direct and indirect effects of floating vegetation mats on Texas wild rice (Zizania texana): The Southwest Naturalist, v. 41, no. 4, p. 462–464.
Power, Paula, and Fonteyn, P.J., 1995, Effects of oxygen concentration and substrate on seed germination and seedling growth of Texas wild rice (Zizania texana): The Southwestern Naturalist, v. 40, no. 1, p. 1–4.
Puente, Celso, 1974, Records of precipitation, water levels, and ground-water recharge to the Edwards and associated limestones, San Antonio area, Texas, 1972–73: San Antonio, Tex., Edwards Underground Water District Bulletin 33, 12 p.
______1976, Statistical analysis of water-level, springflow, and streamflow data for the Edwards aquifer in south-central Texas: U.S. Geological Survey Open-File Report 76–393, 52 p. [Also published as Edwards Underground Water District Report, 58 p.]
Rappmund, R.A., 1975, Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1974: San Antonio, Tex., Edwards Underground Water District Bulletin 34, 8 p.
______1976, Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1975: San Antonio, Tex., Edwards Underground Water District Bulletin 35, 7 p.
______1977, Ground-water discharge from the Edwards and associated limestones, San Antonio area, Texas, 1976: San Antonio, Tex., Edwards Underground Water District Bulletin 36, 8 p.
Rathburn, H.D., 1976, Intensive surface water monitoring survey for segment no. 1906—Leon Creek: Austin, Tex., Texas Water Quality Board, Field Operations Division, Report IMS–45.
Reeves, R.D., 1976, Chemical and bacteriological quality of water at selected sites in the San Antonio area, Texas August 1968–January 1975: San Antonio, Tex., Edwards Underground Water District Report, 122 p.
Reeves, R.D., Rawson, Jack, and Blakey, J.F., 1972, Chemical and bacteriological quality of water at selected sites in the San Antonio area, Texas, August 1968–April 1972: San Antonio, Tex., Edwards Underground Water District Report, 63 p.
Resh, V.H., Myers, M.J., and Hannaford, M.J., 1996, Macroinvertebrates as biotic indicators of environmental quality, in Hauer, F.R., and Lamberti, G.A., eds., Methods in stream ecology: San Diego, Calif., Academic Press, 674 p.
Respess, R.O., 1986, Intensive survey of Blanco River segment 1809, June 3–7, 1985: Austin, Tex., Texas Water Commission, Report IS–86–04, 73 p.
Rettman, P.L., 1969, Records of wells and springs, San Antonio area, Texas: San Antonio, Tex., Edwards Underground Water District Report, 28 p.
Richardson, L.R., and Gold, J.R., 1995, Evolution of the Cyprinella lutrensis species-complex—II. Systematics and biogeography of the Edwards Plateau shiner, Cyprinella lepida: Copeia, v. 1, p. 28–37.
Richerson, J.V., 1982, Species diversity of macroinvertebrates in Cibolo Creek in Shafter, Texas, in Davis, J.R., ed., Proceedings of the Symposium on Recent Benthological Investigations in Texas and Adjacent States: Texas Academy of Science, Aquatic Sciences Section, p. 113–122.
Robins, C.H., 1971, Ecology of the introduced snail, Marisa cornuarietis (Ampullariidae) in Dade County, Florida. The Biologist, v. 53, p. 136–152.
Rosenberg, D.M., and Resh, V.H., 1993, Introduction to freshwater biomonitoring and benthic macroinvertebrates, in Rosenberg, D.M., and Resh, V.H., eds., Freshwater biomonitoring and benthic macroinvertebrates: New York, Chapman and Hall, p. 1–9.
San Antonio River Authority, 1996, Evaluation of aquatic ecosystems of streams in the San Antonio River watershed based on rapid bioassessment protocols: San Antonio River Authority, Environmental Services Division, 186 p.
Sarbu, S.M., Kane, T.C., and Kinkle, B.K., 1996, A chemoautotrophically-based cave ecosystem: Science, v. 272, no. 5,270, p. 1,953-1,955.
Schenck, J.R., 1975, Ecology of the fountain darter, Etheostoma fonticola, (Osteichthyes: Percidae): San Marcos, Tex., Southwest Texas State University, M.S. thesis, 100 p.
Schenck, J.R., and Whiteside, B.G., 1976, Distribution, habitat preference, and population size estimate of Etheostoma fonticola (Osteichthyes: Percidae): Copeia, v. 76, no. 4, p. 697–703.
______1977a, Food habits and feeding behavior of the fountain darter, Etheostoma fonticola (Osteichthyes: Percidae): The Southwestern Naturalist, v. 21, no. 4, p. 487492.
______1977b, Reproduction, fecundity, sexual dimorphism and sex ratio of Etheostoma fonticola (Osteichthyes: Percidae): American Midland Naturalist, v. 98, no. 2, p. 365–375.
Schultz, A.L., 1994, 1994 review and update of the position of the Edwards aquifer freshwater/saline-water interface from Uvalde to Kyle, Texas: Edwards Underground Water District Report 94–05, 31 p.
Sculthorpe, C.D., 1967, The biology of aquatic vascular plants: New York, St. Martin's Press, 610 p.
Short, R.A., 1982, Diel changes in physiochemical and biological parameters in the Guadalupe River, Texas, in Davis, J.R., ed., Proceedings of the Symposium on Recent Benthological Investigations in Texas and Adjacent States: Texas Academy of Science, Aquatic Sciences Section, p. 149–159.
Short, R.A., and Smith, S.L., 1989, Seasonal comparison of leaf processing in a Texas stream: American Midland Naturalist, v. 121, no. 2, p. 219–224.
Sieh, T.W., 1975, Edwards (Balcones fault zone) aquifer test-well drilling investigation: Austin, Tex., Texas Water Development Board, 117 p.
Simon, T.P., Brandt, T.M., Graves, K.G., and Whiteside, B.G., 1995, Ontogeny and description of eggs, larvae, and early juveniles of the fountain darter, Etheostoma fonticola: The Southwestern Naturalist, v. 40, no. 2, p. 208–215.
Solanik, D.C., 1996, Longitudinal and seasonal variation in macroinvertebrate taxonomic and functional feeding group composition of a central Texas stream: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 48 p.
Stanley, E.H., 1986, The ecology of mayflies (Ephemeroptera) in the Guadalupe River Basin, Texas: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 94 p.
Stanley, E.H., and Short, R.A., 1988, Temperature effects on warmwater stream insects—A test of the thermal equilibrium hypothesis: Oikos, v. 51, no. 3, p. 313–320.
Staton, L.L., 1992, Assessment of changes in the aquatic macrophyte community in the upper San Marcos River: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 74 p.
Stock, J.H., and Longley, Glenn, 1981, The generic status and distribution of Monodella texana Maguire, the only known North American Thermosbaenacean: Proceedings of the Biological Society of Washington, v. 94, no. 2, p. 569–578.
Strayer, D.L., 1994, Limits to biological distributions in groundwater, in Gilbert, J., Danielopol, D., and Stanford, J., eds., Groundwater ecology: San Diego, Calif., Academic Press, p. 287–310.
Strenth, N.E., 1976, A review of the systematics and zoogeography of the freshwater species of Palaemonetes Heller of North America: Smithsonian Contributions to Zoology, no. 228, 24 p.
Strenth, N.E., and Longley, Glenn, 1990, Reproductive patterns of the subterranean shrimp Palaemonetes antrorum Benedict (Decapoda, Palaemonidae) from Central Texas: Stygologia, v. 5, no. 4, p. 221–224.
Strenth, N.E., Norton, J.D., and Longley, Glenn, 1988. The larval development of the subterranean shrimp Palaemonetes antrorum Benedict (Decapoda, Palaemonidae) from Central Texas: Stygologia, v. 4, no. 4, p. 363–370.
Sweet, S.S., 1982, A distribution analysis of epigean populations of Eurycea neotenes in central Texas, with comments on the origin of troglobitic populations: Herpetologica, v. 38, no. 3, p. 430–444.
Taylor, R.L., 1995, Biological and associated water-quality data for lower Olmos Creek and upper San Antonio River, San Antonio, Texas, March–October 1990: U.S. Geological Survey Open-File Report 95–103, 73 p.
Taylor, R.L., and Ferreira, R.F., 1995, Biological and associated water-quality data for lower Olmos Creek and upper San Antonio River, San Antonio, Texas, April–September 1989: U.S. Geological Survey Open-File Report 95–148, 68 p.
Terre, D.R., and Magnelia, S.J., 1996, Survey report for the Guadalupe River in Kendall and Comal Counties, Texas, 1995: Texas Parks and Wildlife Department, prepared for Federal Aid in Sport Fish Restoration Act Project F–30–R–21.
______1997, Statewide freshwater fisheries monitoring and management program—Survey report for Canyon Reservoir: Texas Parks and Wildlife Department, prepared for Federal Aid In Sport Fish Restoration Act Project F–30–R–21.
Terrell, E.E., Emery, W.H.P., and Beaty, H.E., 1978, Observations on Zizania texana (Texas wild rice), an endangered species: Bulletin of the Torrey Botanical Club, v. 105, no. 1, p. 50–57.
Texas System of Natural Laboratories, Inc., 1994, Freshwater and marine fishes of Texas and the northwestern Gulf of Mexico—Taxonomic and distributional inventory with bibliography: Austin, Tex., Texas System of Natural Laboratories, Laboratory Index Series No. FTX/NWGM–94, 270 p.
Thornhill, P.D., Harden, R.W., and Nevola, Roger, 1988, The Edwards aquifer—Underground river of Texas: Seguin, Tex., Guadalupe-Blanco River Authority, 63 p.
Tiemann, S.G., 1992, Life history patterns and diversity of caddisflies (Trichoptera) in four streams in the Guadalupe River Basin with contrasting temperature and flow regimes: San Marcos, Tex., Southwest Texas State University, M.S. thesis, 72 p.
Tomme, M.H., 1974, Intensive surface water monitoring survey for segment no. 1902—Cibolo Creek: Austin, Tex., Texas Water Quality Board, Field Operations Division, Report IMS–38.
Trebatoski, B., 1991, Guadalupe River toxicity assessment—Investigation of the potential impact of a domestic wastewater treatment facility upon the Guadalupe River: Texas Water Commission, Report LP 91–04, 33 p.
Twidwell, S.R., 1975, Intensive surface water monitoring survey for segment no. 1901—San Antonio River: Austin, Tex., Texas Water Quality Board, Field Operations Division, Report IMS–30, 32 p.
______1976, Intensive surface water monitoring survey for segment no. 1903—Medina River: Austin, Tex., Texas Water Quality Board, Field Operations Division, Report IMS–46, 56 p.
______1984, Intensive survey of San Antonio River segment 1901: Austin, Tex., Texas Department of Water Resources, Water Quality Assessment Unit, Report IS–59, 46 p.
______1987, Intensive survey of the Guadalupe River, segment 1806: Austin, Tex., Texas Water Commission, Report IS–87–02, 46 p.
Twidwell, S.R., and David, J.R., 1987, Intensive surveys of San Antonio River segments 1901 and 1911, June 6, 1984–May 16, 1985: Austin, Tex., Texas Water Commission, Report IS–87–04, 87 p.
U.S. Environmental Protection Agency, 1996, Biological criteria—Technical guidance for streams and small rivers: Washington, D.C., U.S. Environmental Protection Agency, EPA 822–B–96–001.
U.S. Fish and Wildlife Service, 1995, The San Marcos and Comal Springs and associated aquatic ecosystems recovery plan (revised): Albuquerque, N. Mex., 93 p.
______1997, Endangered and threatened wildlife and plants; final rule to list three aquatic invertebrates in Comal and Hays Counties, Texas, as endangered: Federal Register, v. 62, no. 243, 50 CFR pt. 17, p. 66,295–66,304.
van der Leeden, Frits, Troise, F.L., and Todd, D.K., 1990, The water encyclopedia: Chelsea, Mich., Lewis Publishers, 808 p.
Wanakule, Nisai, 1988, Regression analysis of the San Marcos springflows and water levels of the index well in San Antonio: San Marcos, Tex., Edwards Aquifer Research and Data Center, R1–88, 34 p.
Webster, J.R., and Benfield, E.F., 1986, Vascular plant breakdown in freshwater ecosystems: Annual Review of Ecological Systematics, v. 17, p. 567–594.
Young, F.N., and Longley, Glenn, 1976, A new subterranean aquatic beetle from Texas (Coleoptera: Dytiscidae-Hydroporinae): Annals of the Entomological Society of America, v. 69, no. 5, p. 787–792.
Young, W.C., Whiteside, B.G., Longley, G., and Carter, N.E., 1973, The Guadalupe-San Antonio-Nueces River Basin Project—Review of existing biological data: Final Report to Texas Water Development Board, 400 p.
| AccessibilityFOIAPrivacyPolicies and Notices | |
| |
|