Benthic algal biomass and assemblage changes following environmental flow releases and unregulated tributary flows downstream of a major storage
Alec W. Davie A B D and Simon M. Mitrovic A C
+ Author Affiliations
- Author Affiliations
A Centre for Environmental Sustainability, School of Environment, University of Technology, Sydney, PO Box 123, Broadway, NSW 2007, Australia.
B Present Address: Sydney Catchment Authority, PO Box 323, Penrith, NSW 2751, Australia.
C NSW Office of Water, PO Box 3720, Parramatta, NSW 2124, Australia.
D Corresponding author. Email: alec.davie@sca.nsw.gov.au
Marine and Freshwater Research 65(12) 1059-1071 https://doi.org/10.1071/MF13225
Submitted: 26 August 2013 Accepted: 23 March 2014 Published: 1 October 2014
Abstract
A large dam reducing the magnitude of flows regulates the Severn River, Australia. Environmental flows (EFs) are designed to increase the magnitude of flow and improve ecological outcomes such as reducing filamentous algal biomass and re-setting algal succession. The effectiveness of EF releases to alter benthic algal assemblages is poorly understood. We examined benthic algal biomass and assemblage structure at two cobble-dominated riffle sites downstream of Pindari Dam, before and after two EFs. Both EFs had discharges of ~11.6 m3 s–1 (velocity of ~0.9 m s–1). Neither EF reduced benthic algal biomass, and sometimes led to increases, with density of some filamentous algae increasing (Stigeoclonium and Leptolyngbya). An unregulated flow from a tributary between the two sites increased discharge to 25.2 m3 s–1 (velocity of ~1.2 m s–1), decreasing biomass and density of filamentous algae. The similarity in flow velocities between scouring and non-scouring events suggests that thresholds may exist and/or suspended sediments carried from unregulated tributaries may contribute to reduce algal biomass. Identifying velocities needed to reduce algal biomass are useful. Accordingly, EFs with flow velocities ~1.2 m s–1 may achieve this in river cobble-dominated riffle sections dominated by filamentous algae. Lower flow velocities of <0.9 m s–1 may result in no change or an increase in filamentous algae.
Additional keywords: cobble, diatoms, filamentous, riffle, river, scour, stimulus, velocity.
References
Ács, E., and Kiss, K. T. (1993). Effects of the water discharge on periphyton abundance and diversity in a large river (River Danube, Hungary). Hydrobiologia 249, 125–133.| Effects of the water discharge on periphyton abundance and diversity in a large river (River Danube, Hungary).Crossref | GoogleScholarGoogle Scholar |
Anderson, M. J. (2001). A new method for non-parametric multivariate analysis of variance. Austral Ecology 26, 32–46.
Anderson, M. J., Gorley, R. N., and Clarke, K. R. (2008). ‘PERMANOVA+ for PRIMER: Guide to Software and Statistical Methods.’ (PRIMER-E: Plymouth, UK.)
APHA (American Public Health Association) (1995). ‘Standard Methods for the Examination of Water and Waste Water.’ 19th edn (American Public Health Association: Washington, DC, USA.)
Arthington, A. H., and Pusey, B. J. (2003). Flow restoration and protection in Australian rivers. River Research and Applications 19, 377–395.
| Flow restoration and protection in Australian rivers.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F. (1995). The contribution of flood disturbance, catchment geology and land use to the habitat template of periphyton in stream ecosystems. Freshwater Biology 33, 419–438.
| The contribution of flood disturbance, catchment geology and land use to the habitat template of periphyton in stream ecosystems.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F. (1996). Patterns in benthic algae of streams In ‘Algal Ecology: Freshwater Benthic Ecosystems’. (Eds R. J. Stevenson, M. L. Bothwell and R. L. Lowe) pp. 31–56. (Academic Press: San Diego, CA)
Biggs, B. J. F., and Close, M. E. (1989). Periphyton biomass dynamics in gravel bed rivers: the relative effects of flows and nutrients. Freshwater Biology 22, 209–231.
| Periphyton biomass dynamics in gravel bed rivers: the relative effects of flows and nutrients.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3cXksVGrs7Y%3D&md5=a311614467b930dd099737f84a537e8cCAS |
Biggs, B. J. F., and Gerbeaux, P. (1993). Periphyton development in relation to macro-scale (geology) and micro-scale (velocity) limiters in two gravel-bed rivers, New Zealand. New Zealand Journal of Marine and Freshwater Research 27, 39–53.
| Periphyton development in relation to macro-scale (geology) and micro-scale (velocity) limiters in two gravel-bed rivers, New Zealand.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F., and Hickey, C. W. (1994). Periphyton responses to a hydraulic gradient in a regulated river in New Zealand. Freshwater Biology 32, 49–59.
| Periphyton responses to a hydraulic gradient in a regulated river in New Zealand.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F., and Smith, R. A. (2002). Taxonomic richness of stream benthic algae: effects of flood disturbance and nutrients. Limnology and Oceanography 47, 1175–1186.
| Taxonomic richness of stream benthic algae: effects of flood disturbance and nutrients.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XmtVWhur0%3D&md5=e10aad015eeb968b824f8caf897fa081CAS |
Biggs, B. J. F., and Stokseth, S. (1996). Hydraulic habitat suitability for periphyton in rivers. Regulated Rivers: Research and Management 12, 251–261.
| Hydraulic habitat suitability for periphyton in rivers.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F., and Thomsen, H. A. (1995). Disturbance in stream periphyton to perturbations in shear stress: time to structural failure and differences in community resistance. Journal of Phycology 31, 233–241.
| Disturbance in stream periphyton to perturbations in shear stress: time to structural failure and differences in community resistance.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F., Goring, D. G., and Nikora, V. I. (1998). Subsidy and stress responses of stream periphyton to gradients in water velocity as a function of community growth form. Journal of Phycology 34, 598–607.
| Subsidy and stress responses of stream periphyton to gradients in water velocity as a function of community growth form.Crossref | GoogleScholarGoogle Scholar |
Biggs, B. J. F., Smith, R. A., and Duncan, M. J. (1999). Velocity and sediment disturbance of periphyton in headwater streams: biomass and metabolism. Journal of the North American Benthological Society 18, 222–241.
| Velocity and sediment disturbance of periphyton in headwater streams: biomass and metabolism.Crossref | GoogleScholarGoogle Scholar |
Blenkinsopp, S. A., and Lock, M. A. (1994). The impact of storm-flow on river biofilm architecture. Journal of Phycology 30, 807–818.
| The impact of storm-flow on river biofilm architecture.Crossref | GoogleScholarGoogle Scholar |
Bourassa, N., and Cattaneo, A. (1998). Control of periphyton in Laurentian streams (Quebec). Journal of the North American Benthological Society 17, 420–429.
| Control of periphyton in Laurentian streams (Quebec).Crossref | GoogleScholarGoogle Scholar |
Bunn, S. E., and Arthington, A. (2002). Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity. Environmental Management 30, 492–507.
| Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity.Crossref | GoogleScholarGoogle Scholar | 12481916PubMed |
Burns, A., and Walker, K. F. (2000). Biofilms as food for decapods (Atyidae, Palaemonidae) in the River Murray, South Australia. Hydrobiologia 437, 83–90.
| Biofilms as food for decapods (Atyidae, Palaemonidae) in the River Murray, South Australia.Crossref | GoogleScholarGoogle Scholar |
Chester, H., and Norris, R. (2006). Dams and flow in the Cotter River, Australia: effects on instream trophic structure and benthic metabolism. Hydrobiologia 572, 275–286.
| Dams and flow in the Cotter River, Australia: effects on instream trophic structure and benthic metabolism.Crossref | GoogleScholarGoogle Scholar |
Clarke, K. R. (1993). Nonparametric multivariate analyses of changes in community structure. Australian Journal of Ecology 18, 117–143.
| Nonparametric multivariate analyses of changes in community structure.Crossref | GoogleScholarGoogle Scholar |
Clarke, K. R., and Gorley, R. N. (2006). ‘PRIMER v6: User Manual/Tutorial.’ (PRIMER-E: Plymouth, UK.)
Clarke, K. R., and Warwick, R. M. (2001). ‘Change in Marine Communities: an Approach to Statistical Analysis and Interpretation.’ (Plymouth Marine Laboratory: Plymouth, UK.)
Collier, K. J. (2002). Effects of flow regulation and sediment flushing on instream habitat and benthic invertebrates in a New Zealand river influenced by a volcanic eruption. River Research and Applications 18, 213–226.
| Effects of flow regulation and sediment flushing on instream habitat and benthic invertebrates in a New Zealand river influenced by a volcanic eruption.Crossref | GoogleScholarGoogle Scholar |
Cortez, D. P., Growns, I. O., Mitrovic, S. M., and Lim, R. P. (2012). Effects of a gradient in river regulation on the longitudinal trends in water quality and benthic algal and macroinvertebrate assemblages in the Hunter River, Australia. Marine and Freshwater Research 63, 494–504.
| Effects of a gradient in river regulation on the longitudinal trends in water quality and benthic algal and macroinvertebrate assemblages in the Hunter River, Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XovVGlsro%3D&md5=c8bb48ff3dc0f2e78177c9753b78b89cCAS |
Davey, G. W., Doeg, T. J., and Blyth, J. D. (1987). Responses of the aquatic macroinvertebrate communities to dam construction on the Thompson River, southeastern Australia. Regulated Rivers: Research and Management 1, 71–84.
| Responses of the aquatic macroinvertebrate communities to dam construction on the Thompson River, southeastern Australia.Crossref | GoogleScholarGoogle Scholar |
Davie, A. W. (2013). The influence of flow on benthic assemblages in the Severn River, New South Wales, Australia. Ph.D. Thesis, University of Technology, Sydney.
Davie, A. W., Mitrovic, S. M., and Lim, R. P. (2012). Succession and accrual of benthic algae on cobbles of an upland river following scouring. Inland Waters 2, 89–100.
| Succession and accrual of benthic algae on cobbles of an upland river following scouring.Crossref | GoogleScholarGoogle Scholar |
Davis, J. A., and Barmuta, L. A. (1989). An ecologically useful classification of mean and near-bed flows in streams and rivers. Freshwater Biology 21, 271–282.
Downes, B. J., Lake, P. S., Glaister, A., and Webb, J. A. (1998). Scales and frequencies of disturbances: rock size, bed packing and variation among upland streams. Freshwater Biology 40, 625–639.
| Scales and frequencies of disturbances: rock size, bed packing and variation among upland streams.Crossref | GoogleScholarGoogle Scholar |
Downes, B. J., Entwisle, T. J., and Reich, P. (2003). Effects of flow regulation on disturbance frequencies and in-channel bryophytes and macroalgae in some upland streams. River Research and Applications 19, 27–42.
| Effects of flow regulation on disturbance frequencies and in-channel bryophytes and macroalgae in some upland streams.Crossref | GoogleScholarGoogle Scholar |
Duncan, S. W., and Blinn, D. W. (1989). Importance of physical variables on the seasonal dynamics of epilithic algae in a highly shaded canyon stream. Journal of Phycology 25, 455–461.
| Importance of physical variables on the seasonal dynamics of epilithic algae in a highly shaded canyon stream.Crossref | GoogleScholarGoogle Scholar |
Dyer, F. J., and Thoms, M. C. (2006). Managing river flows for hydraulic diversity: an example of an upland regulated gravel-bed river. River Research and Applications 22, 257–267.
| Managing river flows for hydraulic diversity: an example of an upland regulated gravel-bed river.Crossref | GoogleScholarGoogle Scholar |
Flinders, C. A., and Hart, D. D. (2009). Effects of pulsed flows on nuisance periphyton growths in rivers: a mesocosm study. River Research and Applications 25, 1320–1330.
| Effects of pulsed flows on nuisance periphyton growths in rivers: a mesocosm study.Crossref | GoogleScholarGoogle Scholar |
Francoeur, S. N., and Biggs, B. J. F. (2006). Short-term effects of elevated velocity and sediment abrasion on benthic algal communities. Hydrobiologia 561, 59–69.
| Short-term effects of elevated velocity and sediment abrasion on benthic algal communities.Crossref | GoogleScholarGoogle Scholar |
Gell, P. A., Sonneman, J. A., Reid, M. A., Illman, M. A., and Sincock, A. J. (1999). ‘An Illustrated Key to Common Diatom Genera from Southern Australia.’ CRC Guide No. 26. (Cooperative Research Centre for Freshwater Ecology: Albury, NSW.)
Grimm, N. B., and Fisher, S. G. (1989). Stability of periphyton and macroinvertebrates to disturbance by flash floods in a desert stream. Journal of the North American Benthological Society 8, 293–307.
| Stability of periphyton and macroinvertebrates to disturbance by flash floods in a desert stream.Crossref | GoogleScholarGoogle Scholar |
Growns, I. O., and Growns, J. E. (2001). Ecological effects of flow regulation on macroinvertebrate and periphytic diatom assemblages in the Hawkesbury–Nepean River, Australia. Regulated Rivers: Research and Management 17, 275–293.
| Ecological effects of flow regulation on macroinvertebrate and periphytic diatom assemblages in the Hawkesbury–Nepean River, Australia.Crossref | GoogleScholarGoogle Scholar |
Horner, R. R., and Welch, E. B. (1981). Stream periphyton development in relation to current velocity and nutrients. Canadian Journal of Fisheries and Aquatic Sciences 38, 449–457.
| Stream periphyton development in relation to current velocity and nutrients.Crossref | GoogleScholarGoogle Scholar |
Horner, R. R., Welch, E. B., Seeley, M. R., and Jacoby, J. M. (1990). Responses of periphyton to changes in current velocity, suspended sediment and phosphorus concentration. Freshwater Biology 24, 215–232.
| Responses of periphyton to changes in current velocity, suspended sediment and phosphorus concentration.Crossref | GoogleScholarGoogle Scholar |
Hötzel, G., and Croome, R. (1999). ‘A Phytoplankton Methods Manual for Australian Freshwaters.’ Occasional Paper Series 22/99. (Land and Water Resources Research and Development Corporation: Canberra.)
Humphrey, K. P., and Stevenson, R. J. (1992). Responses of benthic algae to pulses in current and nutrients during simulations of subscouring spates. Journal of the North American Benthological Society 11, 37–48.
| Responses of benthic algae to pulses in current and nutrients during simulations of subscouring spates.Crossref | GoogleScholarGoogle Scholar |
Jowett, I. G., and Biggs, D. J. (1997). Flood and velocity effects on periphyton and silt accumulation in two New Zealand rivers. New Zealand Journal of Marine and Freshwater Research 31, 287–300.
| Flood and velocity effects on periphyton and silt accumulation in two New Zealand rivers.Crossref | GoogleScholarGoogle Scholar |
Kingsford, R. T. (2000). Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia. Austral Ecology 25, 109–127.
| Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia.Crossref | GoogleScholarGoogle Scholar |
Lowe, R. L., Guckert, J. B., Belanger, S. E., Davidson, D. H., and Johnson, D. W. (1996). An evaluation of periphyton community structure and function on tile and cobble substrata in experimental stream mesocosms. Hydrobiologia 328, 135–146.
| An evaluation of periphyton community structure and function on tile and cobble substrata in experimental stream mesocosms.Crossref | GoogleScholarGoogle Scholar |
Matthaei, C. D., Uehlingher, U., Meyer, E. I., and Frutiger, A. (1996). Recolonization by benthic invertebrates after experimental disturbance in a Swiss prealpine river. Freshwater Biology 35, 233–248.
| Recolonization by benthic invertebrates after experimental disturbance in a Swiss prealpine river.Crossref | GoogleScholarGoogle Scholar |
McMahon, T. A., and Finlayson, B. L. (1995). Reservoir system management and environmental flows. Lakes and Reservoirs: Research and Management 1, 65–76.
| Reservoir system management and environmental flows.Crossref | GoogleScholarGoogle Scholar |
McMahon, T. A., and Finlayson, B. L. (2003). Droughts and anti-droughts: the low flow hydrology of Australian Rivers. Freshwater Biology 48, 1147–1160.
| Droughts and anti-droughts: the low flow hydrology of Australian Rivers.Crossref | GoogleScholarGoogle Scholar |
Minshall, G. W. (1978). Autotrophy in stream ecosystems. Bioscience 28, 767–771.
| Autotrophy in stream ecosystems.Crossref | GoogleScholarGoogle Scholar |
NSW DWE (Department of Water and Energy) (2009). ‘Water Sharing Plan. NSW Border Rivers Regulated River Water Source. Background Document.’ DWE 09_135. (NSW Department of Water and Energy: Sydney.)
Patten, D. T., Harpman, D. A., Voita, M. I., and Randle, T. J. (2001). A managed flood on the Colorado River: background, objectives, design, and implementation. Ecological Applications 11, 635–643.
| A managed flood on the Colorado River: background, objectives, design, and implementation.Crossref | GoogleScholarGoogle Scholar |
Peterson, C. G. (1996). Response of benthic algal communities to natural physical disturbances. In ‘Algal Ecology – Freshwater Benthic Ecosystems’. (Eds R. J. Stevenson, M. L. Bothwell and R. L. Lowe.) pp. 375–403. (Academic Press: San Diego, CA.)
Peterson, C. G., and Stevenson, R. J. (1992). Resistance and resilience of lotic algal communities: importance of disturbance timing and current. Ecology 73, 1445–1461.
| Resistance and resilience of lotic algal communities: importance of disturbance timing and current.Crossref | GoogleScholarGoogle Scholar |
Raven, J. A. (1992). How benthic macroalgae cope with flowing freshwater: resource acquisition and retention. Journal of Phycology 28, 133–146.
| How benthic macroalgae cope with flowing freshwater: resource acquisition and retention.Crossref | GoogleScholarGoogle Scholar |
Richter, B. D., and Thomas, G. A. (2007). Restoring environmental flows by modifying dam operations. Ecology and Society 12, 12.
Robinson, C. T., and Uehlinger, U. (2003). Using artificial floods for restoring river integrity. Aquatic Sciences 65, 181–182.
| Using artificial floods for restoring river integrity.Crossref | GoogleScholarGoogle Scholar |
Ryder, D. S. (2004). Response of biofilm metabolism to water level variability in a regulated floodplain river. Journal of the North American Benthological Society 23, 214–223.
Ryder, D. S., Watts, R. J., Nye, E., and Burns, A. (2006). Can flow velocity regulate epixylic biofilm structure in a regulated floodplain river. Marine and Freshwater Research 57, 29–36.
| Can flow velocity regulate epixylic biofilm structure in a regulated floodplain river.Crossref | GoogleScholarGoogle Scholar |
Sonneman, J. A., Sincock, A. J., Fluin, J., and Reid, M. A., Newall P., Tibby J. and Gell P. A. (2000). ‘An Illustrated Guide to Common Stream Diatom Species from Temperate Australia.’ CRC Guide No. 33. (Cooperative Research Centre for Freshwater Ecology: Albury, NSW.)
Stevenson, R. J. (1984). How currents on different sides of substrates in streams affect mechanisms of benthic algal accumulation. Internationale Revue der Gesamten Hydrobiologie und Hydrographie 69, 241–262.
| How currents on different sides of substrates in streams affect mechanisms of benthic algal accumulation.Crossref | GoogleScholarGoogle Scholar |
Stevenson, R. J. (1990). Benthic algal community dynamics in a stream during and after a spate. Journal of the North American Benthological Society 9, 277–288.
| Benthic algal community dynamics in a stream during and after a spate.Crossref | GoogleScholarGoogle Scholar |
Stevenson, R. J. (1996). The stimulation of drag and current. In ‘Algal Ecology – Freshwater Benthic Ecosystems’. (Eds R. J. Stevenson, M. L. Bothwell and R. L. Lowe.) pp. 321–340. (Academic Press: San Diego, CA.)
Stevenson, R. J., and Glover, R. (1993). Effects of algal density and current on ion transport through periphyton communities. Limnology and Oceanography 38, 1276–1281.
| 1:CAS:528:DyaK2cXisFams7Y%3D&md5=c2229d25b596e47e3536f3e889a057d0CAS |
Sturt, M. M., Jansen, M. A. K., and Harrison, S. S. C. (2011). Invertebrate grazing and riparian shade as controllers of nuisance algae in a eutrophic river. Freshwater Biology 56, 2580–2593.
| Invertebrate grazing and riparian shade as controllers of nuisance algae in a eutrophic river.Crossref | GoogleScholarGoogle Scholar |
Tett, P., Gallegos, C., Kelly, M. G., Hornberger, G. M., and Cosby, B. J. (1978). Relationships among substrate, flow, and benthic microalgal pigment density in the Mechums River, Virginia. Limnology and Oceanography 23, 785–797.
| Relationships among substrate, flow, and benthic microalgal pigment density in the Mechums River, Virginia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE1cXls1SgsLc%3D&md5=4e720a5ebf8874b0eb1a7a38030b6898CAS |
Thorp, J. H., and Delong, M. D. (2002). Dominance of autochthonous autotrophic carbon in food webs of heterotrophic rivers. Oikos 96, 543–550.
| Dominance of autochthonous autotrophic carbon in food webs of heterotrophic rivers.Crossref | GoogleScholarGoogle Scholar |
Townsend, S. A., and Padovan, A. V. (2005). The seasonal accrual and loss of benthic algae (Spirogyra) in the Daly River, an oligotrophic river in tropical Australia. Marine and Freshwater Research 56, 317–327.
| The seasonal accrual and loss of benthic algae (Spirogyra) in the Daly River, an oligotrophic river in tropical Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXkslSrtrk%3D&md5=e496da301d70baa8c72d93ca64e2e24dCAS |
Tsai, J. W., Chuang, Y. L., Wu, Z. Y., Kuo, M. H., and Lin, H. J. (2014). The effects of storm-induced events on the seasonal dynamics of epilithic algal biomass in subtropical mountain streams. Marine and Freshwater Research 65, 25–38.
Uehlinger, U., Kawecka, B., and Robinson, C. T. (2003). Effects of experimental floods on periphyton and stream metabolism below a high dam in the Swiss Alps (River Spöl). Aquatic Sciences 65, 199–209.
| Effects of experimental floods on periphyton and stream metabolism below a high dam in the Swiss Alps (River Spöl).Crossref | GoogleScholarGoogle Scholar |
Walker, K. F., Sheldon, F., and Puckridge, J. T. (1995). An ecological perspective on dryland rivers. Regulated Rivers: Research and Management 11, 85–104.
| An ecological perspective on dryland rivers.Crossref | GoogleScholarGoogle Scholar |
Ward, J. V., and Stanford, J. A. (1983). The serial discontinuity concept of lotic ecosystems. In ‘Dynamics of Lotic Ecosystems’. (Eds T. D. Fontaine and S. M. Bartell.) pp. 29–42. (Ann Arbor Science Publishing: Ann Arbor, MI.)
Watts, R. J., Ryder, D. S., Burns, A., Wilson, A. L., Nye, E. R., Zander, A., and Dehaan, R. (2006). Responses of biofilms to cyclic releases during a low flow period in the Mitta Mitta River, Victoria, Australia. Report to the Murray–Darling Basin Commission. Institute for Land Water and Society Report Number 24, Charles Sturt University, Wagga Wagga, NSW.
Watts, R. J., Allan, C., Bowmer, K. H., Page, K. J., Ryder, D. S., and Wilson, A. L. (2009). Pulsed flows: a review of environmental costs and benefits and best practice. Waterlines report no. 16. Australian Government National Water Commission, Canberra.
Welch, E. B., Jacoby, J. M., Horner, R. R., and Seeley, M. R. (1988). Nuisance biomass levels of periphytic algae in streams. Hydrobiologia 157, 161–168.
| Nuisance biomass levels of periphytic algae in streams.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL1cXhtlOmsLs%3D&md5=eced7bbe6771adf1a910065a858d5930CAS |
Wellnitz, T., and Poff, N. L. (2006). Herbivory, current velocity and algal regrowth: how does periphyton grow when the grazers have gone? Freshwater Biology 51, 2114–2123.
