The determination of limestone surface area by linear regression
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An accurate procedure is described to determine rapidly and conveniently the surface area of individual pieces of limestone when estimating benthic macroinvertebrate densities. Based on population samples of 60 limestone and 60 traprock fragments, the authors derived r2 values in their regressions of volume and weight against surface area of 0.909 and 0.939 and 0.84 and 0.76, respectively. Estimates of limestone surface area by these methods yielded error estimates of 4.2% and 3.6%, equal to or superior to any method reviewed.
Key wordssurface area substrate limestone weight volume regression
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- Behmer, D. J. & C. P. Hawkins, 1986. Effects of overhead canopy on macroinvertebrate production in a Utah stream. Freshwat. Biol. 16(3): 287–300.Google Scholar
- Chutter, F. M., 1972. A reappraisal of Needham and Usinger's data on the variability of a stream fauna when sampled with a Swiber sampler. Limnol. Oceanogr. 17: 139–141.Google Scholar
- Dall, P. C., 1979. A sampling technique for littoral stonedwelling organisms. Oikos 33: 106–112.Google Scholar
- Doeg, T. & P. S. Lake, 1981. A technique for assessing the composition and density of the macroinvertebrate fauna of large stones in streams. Hydribiologia 80: 3–6.Google Scholar
- Flannagan, J. & D. Rosenbeeg, 1982. Type of artificial substrates used for sampling freshwater benthic macroinvertebrates. In: J. Cairns, Jr. (ed.), Artificial Substrates, Ann Arbor Science Pub., Ann Arbor, Michigan: 237–266.Google Scholar
- McElhone, M. J. & R. W. Davies, 1983. The influence of rock surface area on the microdistribution and sampling of attached riffle dwelling Trichoptera in Hartley Creek, Alberta. Can. J. Zool. 61: 2300–2304.Google Scholar
- Minshall, G. W., 1984. Aquatic insect-substratum relationships. In: V. H. Resh and D. M. Rosenberg (eds.), The Ecology of Aquatic Insects, Praeger, Westport, Connecticut: 358–400.Google Scholar
- Neves, R. J., 1979. Secondary production of epilithic fauna in a woodland stream. Am. Midl. Nat. 102: 209–224.Google Scholar
- Reice, S. R., 1980. The role of substrate in benthic macroinvertebrate microdistribution and litter decomposition in a woodland stream. Ecology 61(3): 580–590.Google Scholar
- Shelly, T. E., 1979. The effect of rock size upon the distribution of species of Orthocladiinae (Chironomidae: Diptera) and Baetis intercalasis. McDonnaugh (Baetidae: Ephemeroptera). Ecol. Entomol. 4: 95–100.Google Scholar
- Wrona, F. J., P. Calow, J. Ford, D. J. Baird & L. Maltby, 1986. Estimating the abundance of stone-dwelling organisms: A new method. Can. J. Fish. aquat. Sci. 43: 2025–2035.Google Scholar