Journal of Insect Conservation

, Volume 13, Issue 3, pp 297–307 | Cite as

Impact of a dam on benthic macroinvertebrates in a small river in a biodiversity hotspot: Cape Floristic Region, South Africa

Original Paper

Abstract

Suitable reservoirs and monitoring methods are needed to manage scarce water supplies in dry countries. We assessed here the impact on aquatic macroinvertebrates of the only dam on the Eerste River, which runs through the heart of a biodiversity hotspot, the Cape Floristic Region, South Africa. The dam and associated activities, were the only forms of disturbance in this otherwise pristine area. We sampled over 20,000 macroinvertebrate individuals and illustrated some categorical effects of the impoundment and its effects on macroinvertebrate assemblages. Macroinvertebrate species diversity below the dam was only half of that in the pristine catchment area above the dam. Furthermore, Ephemeroptera, Plecoptera and Trichoptera diversity and abundance dropped to almost zero as a result of the impoundment. In contrast, the abundance of the Diptera family Chironomidae increased substantially below the dam. These changes in macroinvertebrate diversity mirrored those recorded in biologically less diverse areas, but are of major concern in this biodiversity hotspot with its rich endemic fauna. We conclude that such an impoundment, while important for human welfare, results in a high price being paid in terms of loss of local biodiversity.

Keywords

Cape Floristic Region Dam Diversity Freshwater invertebrates Impact 

Notes

Acknowledgements

Adam Johnson kindly assisted with fieldwork. Financial support was from the National Research Foundation (NRF) and the University of Stellenbosch.

References

  1. Allan JD (1995) Stream ecology: structure and function of running waters. Chapman and Hall, LondonGoogle Scholar
  2. Armitage PD, Blackburn JH (1990) Environmental stability and communities of Chironomidae (Diptera) in a regulated river. Regul Rivers Res Manage 5:319–328. doi: 10.1002/rrr.3450050404 CrossRefGoogle Scholar
  3. Barow ME, McIntosh MD, Burky AJ, Way CM (2005) The influence of stream flow reduction on the energetics of Hawaiian torrenticolous aquatic insects, Telmatogeton Schiner and Pocanace Hendel. J Insect Conserv 9:175–185. doi: 10.1007/s10841-005-4831-0 CrossRefGoogle Scholar
  4. Basson MS, Van Niekerk PH, Van Rooyen JA (1997) Overview of water resources availability and utilisation in South Africa. DWAF Report No. PRSA/00/0197. Department of Water Affairs and Forestry and BKS (Pty) Ltd, Pretoria, South AfricaGoogle Scholar
  5. Bednarek A (2001) Undamming rivers: a review of the ecological impacts of dam removal. Environ Manage (N Y) 27:803–814. doi: 10.1007/s002670010189 CrossRefGoogle Scholar
  6. Born SM, Genskow KD, Filbert TL, Hernandez-Mora N, Keefer ML, White KA (1998) Socioeconomic and institutional dimensions of dam removals: the Wisconsin experience. Environ Manage (N Y) 22:359–370. doi: 10.1007/s002679900111 CrossRefGoogle Scholar
  7. Brasher AMD (2003) Impacts of human disturbances on biotic communities in Hawaiian streams. Bioscience 53:1052–1060. doi: 10.1641/0006-3568(2003)053[1052:IOHDOB]2.0.CO;2 CrossRefGoogle Scholar
  8. Brittain JE, Saltveit SJ (1989) A review of the effect of river regulation on mayflies (Ephemeroptera). Regul Rivers Res Manage 3:191–204. doi: 10.1002/rrr.3450030119 CrossRefGoogle Scholar
  9. Brown CA, Dallas HF (1995) Eerste River, Western Cape: situation assessment of the riverine ecosystem. Final report, June 1995. Southern Waters Ecological Research and Consultancy, CSIR, Stellenbosch, South AfricaGoogle Scholar
  10. Chapman PM, Power EA, Burton GA Jr (1992) Integrative assessments in aquatic ecosystems. In: Burton GA Jr (ed) Sediment toxicity assessment. Lewis Boca Raton, Florida, pp 313–340Google Scholar
  11. Chutter FM (1994) The rapid biological assessment of streams and rivers water quality by means of macroinvertebrate community in South Africa. Progress Report to the Water Research Commission, Pretoria, South AfricaGoogle Scholar
  12. Davies B, Day J (1998) Vanishing waters. University of Cape Town Press, Cape Town, South AfricaGoogle Scholar
  13. Dickens CWS, Graham PM (2002) The South African Scoring System (SASS5) Version 5 rapid bioassessment method for rivers. Afr J Aquat Sci 27:1–10Google Scholar
  14. Doeg TJ, Koehn JD (1994) Effects of draining and desilting a small weir on downstream fish and macroinvertebrates. Regul Rivers Res Manage 9:263–277. doi: 10.1002/rrr.3450090407 CrossRefGoogle Scholar
  15. Drinkwater KF, Frank KT (1994) Effects of river regulation and diversion on marine fish and invertebrates. Aquat Conserv Freshw Mar Ecosyst 4:135–151. doi: 10.1002/aqc.3270040205 CrossRefGoogle Scholar
  16. Kevan PG (1999) Pollinators as bioindicators of the state of the environment: species, activity and diversity. Agric Ecosyst Environ 74:373–393. doi: 10.1016/S0167-8809(99)00044-4 CrossRefGoogle Scholar
  17. King JM, Schael DM (2001) Assessing the ecological relevance of a spatially-nested geomorphological hierarchy for river management. WRC Report No 754/1/01 Freshwater Research Unit, University of Cape Town, Cape Town, South AfricaGoogle Scholar
  18. Kondolf GM (1997) Hungry water: effects of dams and gravel mining on river channels. Environ Manage (N Y) 21:533–551. doi: 10.1007/s002679900048 CrossRefGoogle Scholar
  19. Ligon FK, Dietrich WE, Trush WJ (1995) Downstream ecological effects of dams. Bioscience 45:183–192. doi: 10.2307/1312557 CrossRefGoogle Scholar
  20. Loch DD, West JL, Perlmutter DG (1996) The effect of trout farm effluent on the taxa richness of benthic macroinvertebrates. Aquaculture 147:5–10. doi: 10.1016/S0044-8486(96)01394-4 CrossRefGoogle Scholar
  21. Logan P, Brooker MP (1983) The macroinvertebrate faunas of riffles and pools. Water Res 17:263–270. doi: 10.1016/0043-1354(83)90179-3 CrossRefGoogle Scholar
  22. Mackie GL (1998) Applied aquatic ecosystem concepts. University of Guelph Custom CoursepackGoogle Scholar
  23. Madikizela BR, Dye AH, O’Keeffe JH (2001) Water quality and faunal studies in the Umzimvubu Catchment, Eastern Cape with particular emphasis on species as indicators of environmental change. WRC Report No.716/1/01. Freshwater Research Unit, University of Cape Town, Cape Town, South AfricaGoogle Scholar
  24. Malmqvist B, Englund G (1996) Effects of hydropower-induced flow perturbations on Mayfly (Ephemeroptera) richness and abundance in North Swedish river rapids. Hydrobiologia 341:145–158. doi: 10.1007/BF00018118 CrossRefGoogle Scholar
  25. March JG, Benstead JP, Pringle CM, Scatena FN (2003) Damming tropical island streams: problems, solutions, and alternatives. Bioscience 53:1069–1078. doi: 10.1641/0006-3568(2003)053[1069:DTISPS]2.0.CO;2 CrossRefGoogle Scholar
  26. McIntosh MD, Benbow ME, Burkey AJ (2002) Effects of stream diversion on riffle macroinvertebrate communities in a Maui, Hawaii, stream. River Res Appl 18:569–581. doi: 10.1002/rra.694 CrossRefGoogle Scholar
  27. Metcalf-Smith JL (1994) Biological water-quality assessment of rivers: use of macroinvertebrate communities. In: Calow P, Petts GE (eds) The rivers handbook, hydrological and ecological principles, vol 2. Blackwell Scientific Publications, Oxford, pp 144–170Google Scholar
  28. Mittermeier RA, Gil PR, Hoffmann M, Pilgrim J, Brooks T, Mittermeier CG et al (2004) Hotspots revisited. Cemex, Mexico CityGoogle Scholar
  29. Myers N, Mittermeier CG, Da Fonseca GAB, Kent J (2000) Biodiversity hotspots for conservation priorities. Nature 403:853–858. doi: 10.1038/35002501 PubMedCrossRefGoogle Scholar
  30. Nebeker AV (1971) Effect of high winter water temperatures on adult emergence of aquatic insects. Water Res 5:777–778. doi: 10.1016/0043-1354(71)90100-X CrossRefGoogle Scholar
  31. Petts GE (1984) Impounded rivers: perspectives for ecological management. Wiley, Chichester, p 322Google Scholar
  32. Poff NL, Allan JD, Bain MB, Karr JR, Prestegaard KL, Richter BD et al (1997) The natural flow regime. Bioscience 47:769–784. doi: 10.2307/1313099 CrossRefGoogle Scholar
  33. Quinn JM, Hickey CW (1990) Magnitude of effects of substrate particle size, recent flooding, and catchment development on benthic invertebrates. N Z J Mar Freshw Res 24:411–427CrossRefGoogle Scholar
  34. Resh VH (1995) The use of bentic macroinvertebrates and rapid assessment procedures for water quality monitoring in developing and newly industrialized countries. In: Davis WS, Simon T (eds) Biological assessment and criteria: tools for water resource planning and decision making. Lewis Publishers, Chelsea, pp 159–194Google Scholar
  35. Resh VH, Rosenberg DM (1984) The ecology of aquatic insects. Praeger, New YorkGoogle Scholar
  36. Roque FO, Trivinho-Strixino S, Strixino G, Agostinho RC, Fogo JC (2002) Benthic macroinvertebrates in streams of the Jarague State Park (Southeast of Brazil) considering multiple spatial scales. J Insect Conserv 7:63–72. doi: 10.1023/A:1025505323668 CrossRefGoogle Scholar
  37. Rosenberg DM (1998) A national aquatic ecosystem health program for Canada: we should go against the flow. Bull Entomol Soc Can 30:144–152Google Scholar
  38. Rosenberg DM, Resh VH (1993) Freshwater biomonitoring and benthic macroinvertebrates. Chapman and Hall, New YorkGoogle Scholar
  39. Rosenberg DM, Danks HV, Lehmkuhl DM (1986) Importance of insects in environmental impact assessment. Environ Manage (N Y) 10:773–783. doi: 10.1007/BF01867730 CrossRefGoogle Scholar
  40. Samways MJ, Taylor S (2004) Impacts of invasive alien plants on Red-listed South African dragonflies (Odonata). S Afr J Sci 100:78–80Google Scholar
  41. Smith J, Samways MJ, Taylor S (2007) Assessing riparian quality using two complementary sets of bioindicators. Biodivers Conserv 16:2695–2713. doi: 10.1007/s10531-006-9081-2 CrossRefGoogle Scholar
  42. Stanford JA, Ward JV, Liss WJ, Frissell CA, Williams RN, Lichatowich JA et al (1996) A general protocol for restoration of regulated rivers. Regul Rivers Res Manage 12:391–413. doi:10.1002/(SICI)1099-1646(199607)12:4/5<391::AID-RRR436>3.0.CO;2-4CrossRefGoogle Scholar
  43. Steytler NS, Samways MJ (1995) Biotope selection by adult male dragonflies (Odonata) at an artificial lake created for insect conservation in South Africa. Biol Conserv 72:381–386. doi: 10.1016/0006-3207(94)00052-R CrossRefGoogle Scholar
  44. Turner CR (2000) A contribution to the study of the Table Mountain water beetles (Coleoptera) with special reference to the environmental impact of reservoirs. City Engineers Department, Cape TownGoogle Scholar
  45. Vannote RL, Minshall GW, Cummins KW, Sedell JR, Cushing CE (1980) The river continuum concept. Can J Fish Aquat Sci 37:130–137CrossRefGoogle Scholar
  46. Vigano L, Arillo A, Buffagni A, Camusso M, Ciannarella R, Crosa G et al (2002) Quality assessment of bed sediments of the Po River (Italy). Water Res 37:501–518. doi: 10.1016/S0043-1354(02)00109-4 CrossRefGoogle Scholar
  47. Ward JV (1992) Aquatic insect ecology: biology and habitat. Wiley, New YorkGoogle Scholar
  48. Ward JV (1998) Riverine landscapes: biodiversity patterns, disturbance regimes, and aquatic conservation. Biol Conserv 83:269–278. doi: 10.1016/S0006-3207(97)00083-9 CrossRefGoogle Scholar
  49. Ward JV, Stanford JA (1995) Ecological connectivity in alluvial river ecosystems and its disruption by flow regulation. Regul Rivers Res Manage 11:105–119. doi: 10.1002/rrr.3450110109 CrossRefGoogle Scholar
  50. Williams DD, Feltmate BW (1992) Aquatic insects. CAB International, Redwood Press, MelkshamGoogle Scholar
  51. Winston MR, Taylor CM, Pigg J (1991) Upstream extirpation of four minnow species due to damming of a prairie stream. Trans Am Fish Soc 120:98–105. doi:10.1577/1548-8659(1991)120<0098:UEOFMS>2.3.CO;2CrossRefGoogle Scholar
  52. Yeager BL (1994) Impacts of reservoirs on the aquatic environment of regulated rivers. Tennessee Valley Authority, Water Resources, Aquatic Biology Department, TVA/WR/AB-93/1, Norris, Tennessee, USAGoogle Scholar
  53. Zwick P (1992) Stream habitat fragmentation—a threat to biodiversity. Biodivers Conserv 1:80–97. doi: 10.1007/BF00731036 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Department of Conservation Ecology and Entomology, and Centre for Invasion BiologyUniversity of StellenboschMatielandSouth Africa

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