First spatio-temporal study of macroinvertebrates in the Santa Cruz River: a large glacial river about to be dammed without a comprehensive pre-impoundment study
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The Santa Cruz River is the last free-flowing river in Argentinean Patagonia. Two dams are projected, and no comprehensive pre-impoundment study has been undertaken. The present study investigated macroinvertebrate communities along three different hydrological periods and at three river sections located upstream and downstream of future dams. Fifty-three macroinvertebrate taxa were identified, with the most abundant orders being Ephemeroptera, Plecoptera, Coleoptera, and Crustacea (particularly amphipods). Ordination methods (CCA) and generalized linear models (GLM) were applied. According to the CCA, the main environmental variables related to macroinvertebrate density were temperature, suspended solids, depth, and substrate size. For the GLM, the main factors associated with macroinvertebrate abundance were location and hydrological period, and variables with the highest influences were temperature, substrate size, current speed, and depth. We anticipate that dam construction will modify in-stream habitat conditions, leading to changes in (i) macroinvertebrate community structure and (ii) local fish abundance due to loss of key prey taxa.
KeywordsDams Large rivers GLM Southern Hemisphere Benthos
The authors wish to acknowledge the contributions of two anonymous reviewers that enriched this manuscript with their suggestions. We would also like to thank PhD Gabriela Romano for her suggestions. Funded by Consejo Nacional de Investigaciones Científicas y Tecnológicas and Agencia Nacional para la Promoción de la Ciencia y la Tecnología. M. T. was supported by CONICET Graduate Fellowship. Centro Nacional Patagónico (CENPAT-CONICET) provided support for the optic service. Ea. Río Bote, Ea. La Martina, Ea. San Ramón, Ea. La Marina, Los Plateados provided logistic support. This research project was conducted under the animal care regulations of CONICET.
- APHA, 1994. Standard methods for the examination of water and wastewater. American Public Health Association, Hanover.Google Scholar
- Barton, K., 2013. MuMIn: Multi-model Inference. http://cran.r-project.org/web/packages/MuMIn/index.html.
- Brown, L. E., D. M. Hannah, A. M. Milner, C. Soulsby, A. Hodson & M. J. Brewer, 2006. Water source dynamics in an alpine glacierized river basin (Taillon-Gabiétous, French Pyrénées). Water Resources Research 42: W08404.Google Scholar
- Castella, E., H. Adalsteinsson, J. E. Brittain, G. M. Gislason, A. Lehmann, V. Lencioni, B. Lods-Crozet, B. Maiolini, A. Milner, J. S. Olafsson, S. J. Saltveit & D. L. Snook, 2001. Macrobenthic invertebrate richness and composition along a latitudinal gradient of European glacier-fed streams. Freshwater Biology 46: 1811–1831.CrossRefGoogle Scholar
- Domínguez, E. & H. R. Fernández (eds), 2009. Macroinvertebrados bentónicos sudamericanos. Sistemática y biología. Fundación Miguel Lillo, Tucumán.Google Scholar
- Doyle, M., E. H. Stanley & J. M. Harbor, 2003. Channel adjustments following two dam removals in Wisconsin. Water Resources Research 39: 15 pp.Google Scholar
- EC, 2000. Directive 2000/60/EC of the European Parliament and of the council of 23 October 2000 establishing a framework for Community action in the field of water policy (Water Framework Directive). L327. European Commission, Brussels: 1–72.Google Scholar
- EC, 2009. Common implementation strategy for the Water Framework Directive. Guidance document No. 24: River Basin Management in a Changing Climate. Commission of the European Communities, Brussels. http://circa.europa.eu/Public/irc/env/wfd/library?l=/framework_directive/guidance_documents/management_finalpdf/_EN_1.0_&a=d.
- Gordon, N. D., T. A. McMahon, B. L. Finlayson, C. J. Gippel & R. J. Nathan, 2004. Stream Hydrology. An Introduction for Ecologists. Wiley, Sussex.Google Scholar
- Gurnell, A. M. & C. R. Fenn, 1987. Proglacial Channel Processes. In Gurnell, A. M. & M. J. Clark (eds), Glaciofluvial Sediment Transfer: An Alpine Perspective. Wiley, Chichester: 423–472.Google Scholar
- Gup, T., 1994. Dammed from here to eternity: dams and biological integrity. Trout 35: 14–20.Google Scholar
- Hastie, T. & R. Tibshirani, 1990. Generalized Additive Models. Chapman and Hall, London.Google Scholar
- Lopretto, E. C. & G. Tell, 1995. Ecosistemas de aguas continentales. Metodologias para su estudio. Ed. Sur, Argentina.Google Scholar
- Merritt, R. W. & K. W. Cummins (eds), 1996. An Introduction to the Aquatic Insects of North America, 3rd ed. Kendall/Hunt, Dubuque.Google Scholar
- Ministerio de Planificación, 2015.Secretaria de Energía: http://www.energia.gov.ar/home/.
- Pascual, M. A., V. Cussac, B. Dyer, D. Soto, P. Vigliano, S. Ortubay & P. Macchi, 2007. Freshwater fishes of Patagonia in the 21st century after a hundred years of human settlement, species introductions, and environmental change. Aquatic Ecosystem Health & Management 10: 212–227.CrossRefGoogle Scholar
- Poff, N. L., C. M. Brown, T. E. Grantham, J. H. Matthews, M. A. Palmer, C. M. Spence, R. L. Wilby, M. Haasnoot, G. Mendoza, K. C. Dominique & A. Baeza, 2015. Sustainable water management under future uncertainty with eco-engineering decision scaling. Nature 6(1): 1–10.Google Scholar
- R Development Core Team, 2012. R: A language and environment for statistical computing. R. Foundation for statistical Computing, Vienna. Retrieved from http://www.R-project.org/.
- Röthlisberger, H. & H. Lang, 1987. Glacial hydrology. In Gurnell, A. M. & M. J. Clark (eds), Glacio-fluvial sediment transfer. Wiley, Chichester: 207–284.Google Scholar
- Salinas, L., 2014. Represas en Santa Cruz: confirman que la construcción arranca en enero – Dams in Santa Cruz: confirmation that construction starts in January. http://www.clarin.com/politica/Represas-Santa_Cruz-glaciar-construccion_0_1260474141.html.
- SRH, 2013. Subsecretaría de Recursos Hídricos de la Nación. http://www.hidricosargentina.gov.ar/.
- Tagliaferro, M., 2014. Estructura espacial, temporal y trófica de las comunidades acuáticas del río Santa Cruz. (Spatial, temporal, trophic structure of the aquatic communities of the Santa Cruz River). PhD Thesis – Universidad de Buenos Aires-Facultad de Ciencias Exactas y Naturales: 195 pp.Google Scholar
- Tagliaferro, M., I. Arismendi, J. Lancelotti & M. Pascual, 2015. A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia. Environmental Biology of Fishes 98: 1311–1325.CrossRefGoogle Scholar
- TerBraak, C. J. F. & P. Smilauer, 1999. CANOCO for Windows (Version 4.02). A FORTRAN Program for Canonical Community Ordination – Centre for biometry Wageningen, Wageningen.Google Scholar
- Ward, J. V. & J. A. Stanford (eds), 1979. The Ecology of Regulated Streams. Plenum, New York.Google Scholar