Abstract
Abrasion is a significant disturbing force to which the streambed epilithic biota is exposed during high flow periods. However, abrasion of biota in the field has not been measured, and effects of abrasion on biota are usually inferred. We describe a method that quantifies abrasion of a standardised substrate in the field. This provides an index of the level of abrasion to which flora and fauna are exposed. The method uses autoclaved lightweight aerated concrete (ALC) blocks that are fixed in place on the streambed and subsequently abraded. Two methods were used to quantify abrasion: the change in mass of the block from before to after deployment, and the reduction in cross-sectional area of the corners of the blocks as measured by image analysis. We performed preliminary trials in the laboratory to quantify the amount of work required to remove mass from the blocks. These measurements confirmed that ALC was a consistent substrate with regards to the amount of work required to remove a given mass. The technique was field-tested during a year-long survey at six sites in the Acheron valley, south-eastern Australia. Blocks were deployed for approximately 2 months at a time at each of six sites. The method was able to distinguish average differences in abrasion between trials and sites, but neither of these factors was constant. The variability of abrasion within sites was also high. Results show that the technique in its current form can be used to provide an index of the amount of abrasion to which the epilithic biota is exposed in streams and rivers. An assessment of the strengths and weaknesses of the technique is provided, and suggestions made for further improvements and research.
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References
B. J. F. Biggs (1996) Patterns in benthic algae of streams R. J. Stevenson M. L. Bothwell R. L. Lowe (Eds) Algal Ecology: Freshwater Benthic Ecosystems Academic Press San Diego 31–56
B. J. F. Biggs M. E. Close (1989) ArticleTitlePeriphyton biomass dynamics in gravel bed rivers: the relative effects of flows and nutrients Freshwater Biology 22 209–231 Occurrence Handle1:CAS:528:DyaK3cXksVGrs7Y%3D
B. J. F. Biggs H. A. Thomsen (1995) ArticleTitleDisturbance of stream periphyton by perturbations in shear stress: time to structural failure and differences in community resistance Journal of Phycology 31 233–241 Occurrence Handle10.1111/j.0022-3646.1995.00233.x
B. J. F. Biggs R. A. Smith M. J. Duncan (1999) ArticleTitleVelocity and sediment disturbance of periphyton in headwater streams: biomass and metabolism Journal of the North American Benthological Society 18 222–241
N. R. Bond B. J. Downes (2000) ArticleTitleFlow-related disturbance in streams: an experimental test of the role of rock movement in reducing macroinvertebrate population densities Marine and Freshwater Research 51 333–337 Occurrence Handle10.1071/MF99120
P. A. Brewer G. J. L. Leeks J. Lewin (1992) Direct measurement of in-channel abrasion processes D. E. Walling J. Bogen T. J. Day (Eds) Erosion and Sediment Transport Monitoring Programmes in River Basins (Proceedings of the Oslo Symposium, August 1992) International Association of Hydrological Sciences Wallingford, Oxfordshire 21–29
R. G. Death (2000) ArticleTitleHabitat stability and interspecific associations among invertebrate assemblages in New Zealand streams New Zealand Journal of Marine and Freshwater Research 34 501–506
M. S. Doty (1971) ArticleTitleMeasurement of water movement in reference to benthic algal growth Botanica Marina 14 32–35
B. J. Downes A. Glaister P. S. Lake (1997) ArticleTitleSpatial variation in the force required to initiate rock movement in 4 upland streams: implications for estimating disturbance frequencies Journal of the North American Benthological Society 16 203–220
B. J. Downes J. S. Hindell N. R. Bond (2000) ArticleTitleWhat’s in a site? Variation in invertebrate density and diversity in a spatially replicated experiment Austral Ecology 25 128–139 Occurrence Handle10.1046/j.1442-9993.2000.01019.x
B. J. Downes P. S. Lake A. Glaister J. A. Webb (1998) ArticleTitleScales and frequencies of disturbances: rock size, bed packing and variation among upland streams Freshwater Biology 40 625–639 Occurrence Handle10.1046/j.1365-2427.1998.00360.x
M. J. Duncan A. M. Suren S. L. R. Brown (1999) ArticleTitleAssessment of streambed stability in steep, bouldery streams: development of a new analytical technique Journal of the North American Benthological Society 18 445–456
S. G. Fisher N. B. Grimm (1988) ArticleTitleDisturbance as a determinant of structure in a Sonoran Desert stream ecosystem Verhandlungen der Internationale Vereinigung fur Theoretische und Angewandt Limnologie 23 1183–1189
Francoeur, S. N. & B. J. F. Biggs, in press. Short-term effects of elevated velocity and sediment abrasion on benthic algal communities. Hydrobiologia.
S. N. Francoeur B. J. F. Biggs R. L. Lowe (1998) ArticleTitleMicroform bed clusters as refugia for periphyton in a flood-prone headwater stream New Zealand Journal of Marine and Freshwater Research 32 363–374
N. B. Grimm S. G. Fisher (1989) ArticleTitleStability of periphyton and macroinvertebrates to disturbance by flash floods in a desert stream Journal of the North American Benthological Society 8 293–307
A. G. Hildrew P. S. Giller (1994) Patchiness, species interactions and disturbance in the stream benthos P. S. Giller A. G. Hildrew D. G. Raffaelli (Eds) Aquatic Ecology: Scale, Pattern and Process Blackwell Scientific Cambridge 21–62
R. R. Horner E. B. Welch M. R. Seely J. M. Jacoby (1990) ArticleTitleResponses of periphyton to changes in current velocity, suspended sediment and phosphorus concentration Freshwater Biology 24 215–232
P. L. Jokiel J. I. Morrissey (1993) ArticleTitleWater motion on coral reefs: evaluation of the ‘clod card’ technique Marine Ecology-Progress Series 93 175–181
R. E. Kirk (1995) Experimental design: procedures for the behavioural sciences EditionNumber3 Brooks/Cole Pacific Grove, Ca
P. S. Lake (2000) ArticleTitleDisturbance, patchiness, and diversity in streams Journal of the North American Benthological Society 19 573–592
J. Lewin P. A. Brewer (2002) ArticleTitleLaboratory simulation of clast abrasion Earth Surface Processes and Landforms 27 145–164 Occurrence Handle10.1002/esp.306
Pfankuch D. J., 1975. Stream reach inventory and channel stability evaluation. United States Department of Agriculture Forest Service, Region 1, Missoula, Montana.
M. E. Power (1992) ArticleTitleHydrological and trophic controls of seasonal algal blooms in northern California rivers Archiv fur Hydrobiologie 125 385–410
V. H. Resh A. V. Brown A. P. Covich M. E. Gurtz H. W. Li G. W. Minshall S. R. Reice A. L. Sheldon J. B. Wallace R. Wissmar (1988) ArticleTitleThe role of disturbance in stream ecology Journal of the North American Benthological Society 7 433–455
G. D. Sanson R. Stolk B. J. Downes (1995) ArticleTitleA new method for characterizing surface roughness and available space in biological systems Functional Ecology 9 127–135
B. G. Tabachnick L. S. Fidell (2000) Using Multivariate Statistics EditionNumber4 Allyn and Bacon Boston
C. R. Townsend M. R. Scarsbrook S. Dolédec (1997a) ArticleTitleQuantifying disturbance in streams: alternative measures of disturbance in relation to macroinvertebrate species traits and species richness Journal of the North American Benthological Society 16 531–544
C. R. Townsend M. R. Scarsbrook S. Dolédec (1997b) ArticleTitleThe intermediate disturbance hypothesis, refugia, and biodiversity in streams Limnology and Oceanography 42 938–949
J. H. Winterbottom S. E. Orton A. G. Hildrew J. Lancaster (1997) ArticleTitleField experiments on flow refugia in streams Freshwater Biology 37 569–580 Occurrence Handle10.1046/j.1365-2427.1997.00184.x
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Webb, J.A., Downes, B.J., Lake, P.S. et al. Quantifying Abrasion of Stable Substrata in Streams: A New Disturbance Index for Epilithic Biota. Hydrobiologia 559, 443–453 (2006). https://doi.org/10.1007/s10750-005-0895-9
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DOI: https://doi.org/10.1007/s10750-005-0895-9