Ivan  Arismendi
Ivan  Arismendi
Ivan  Arismendi

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climate change
biological invasions
food webs
population ecology
community ecology
multivariate statistics
Ivan Arismendi
Assistant Professor

Freshwater Fishes, Stream Ecology, Limnology, Biological invasions, Hydrology, Climate Change, Water Quality, Diversity and Inclusion in Science

OSU Campus
Fisheries and Wildlife
Office: 40 Nash Hall
Oregon State University
Corvallis, OR 97331
United States
(541) 737 2639


My interests encompass stream ecology, limnology, hydrology, forestry, and watershed-level processes. In particular, I am interested in the consequences of climate change on freshwater ecosystems, biological invasions in freshwaters, and terrestrial-aquatic food webs. In addition, I am interested on issues related to diversity and inclusion in sciences.



FW 456/556 Limnology (Winter, Spring)

FW580 Stream Ecology (Winter, 2017)


Post-Doctoral Scholar, 2010-2012
College of Earth, Ocean, and Atmospheric Sciences (CEOAS)
Oregon State University, Corvallis, Oregon

Doctor in Forest Sciences, 2010
Universidad Austral, Valdivia, Chile

B.S. Fisheries Engineering (Maximum Distinction), 1997
Universidad Austral, Puerto Montt, Chile

I accept graduate students for the Fisheries and Wildlife Department



Flitcroft RL, C Little, J Cabrera, I Arismendi. Accepted. Planning ecologically: the importance of management at catchment scales. In: Finlayson CM, AH Arthington, J Pittock (Eds.) Freshwater Ecosystems in Protected Areas Conservation and Management. Taylor and Francis, Oxford, UK

Withmore M, B Johnson, CA Murphy, I Arismendi, SL Johnson. 2017. Littoral benthic macroinvertebrate response to water-level fluctuations in three reservoirs of the Willamette River Basin, Oregon. River Research and Applications. https://doi.org/10.1002/rra.3150

Fierro P, C Valdovinos, L Vargas-Chacoff, C Bertrán, I Arismendi. 2017. Macroinvertebrates and fish as bioindicators of stream water pollution. In: H Tutu (Ed.) Water Quality pp 23-38. ISBN 978-953-51-4871-5


Flitcroft R, S Lewis, I Arismendi, R LovellFord, M Santelmann, M Safeeq, G Grant (2016) Linking hydroclimate to fish phenology and habitat use with ichthyographs. PLoS ONE 11(12): e0168831. doi:10.1371/journal.pone.0168831

Arismendi I, BE Penaluna (2016) Examining diversity inequities in fisheries science: A call to action. Bioscience 66(7):584-591 Highlighted as the front-matter of the July issue

Safeeq M, S Shukla, I Arismendi, GE Grant, SL Lewis, A Nolin (2016) Influence of winter season climate variability on snow-precipitation ratio in the Western U.S. International Journal of Climatology 36(9):3175–3190

Fierro P, L Quilodrán, C Bertrán, I Arismendi, J Tapia, F Peña-Cortés, E Hauenstein, R Arriagada, E Fernández, L Vargas-Chacoff (2016) Rainbow Trout diets and macroinvertebrates assemblages responses from watersheds dominated by native and exotic plantations. Ecological Indicators 60:655-667


Benavente JN, LW Seeb, JE Seeb, I Arismendi, CE Hernández, G Gajardo, R Galleguillos, MI Cadiz, SS Musleh, D Gomez-Uchida (2015) Temporal genetic variance and propagule-driven genetic structure characterize naturalized rainbow trout (Oncorhynchus mykiss) from a Patagonian lake impacted by trout farming. PLoS ONE 10(11): e0142040. doi:10.1371/journal.pone.0142040

Vargas PV, I Arismendi, D Gomez-Uchida (2015) Evaluating taxonomic homogenization of freshwater fish assemblages in Chile. Revista Chilena de Historia Natural 88(16) DOI: 10.1186/s40693-015-0046-2

Penaluna BE, JB Dunham, SF Railsback, I Arismendi, SL Johnson, RE Bilby, M Safeeq, AE  Skaugset (2015) Local variability explains vulnerability of trout populations to land use and climate change. PLoS ONE 10(8):e0135334

Arismendi I, SL Johnson, JB Dunham (2015) Higher-order statistical moments and a procedure that detects potentially anomalous years as two alternative methods describing alterations in continuous environmental data. Hydrology and Earth System Sciences 19, 1169-1180

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


Safeeq M, GS Mauger, GE Grant, I Arismendi, A Hamlet, S Lee (2014) Comparing large-scale hydrological model predictions with observed streamflow in the Pacific Northwest: effect of climate and groundwater. Journal of Hydrometeorology 15(6):2501-2521.

Arismendi I, M Safeeq, JB Dunham, SL Johnson (2014) Can air temperature be used to -project influences of climate change on stream temperature? Environmental Research Letters 9, 084015.

Arismendi I, B Penaluna, JB Dunham, C García de Leaniz, D Soto, I Fleming, D Gomez-Uchida, G Gajardo, P Vargas, J León-Muñoz (2014) Differential invasion success of salmonids in southern Chile: patterns and hypotheses. Reviews in Fish Biology and Fisheries 24:919-941


Sepúlveda M, I Arismendi, D Soto, F Jara & F Farias (2013) Escaped farmed salmon and trout in Chile: incidence, impacts, and the need for an ecosystem view. Aquaculture Environment Interactions 4:273-283

Marr SM, JD Olden, F Leprieur, I Arismendi, M Ćaleta, DL Morgan, A Nocita, R Šanda, AS Tarkan & E García-Berthou (2013) A global assessment of freshwater fish introductions in Mediterranean-climate regions. Hydrobiologia 719:317-329

Arismendi I, SL Johnson, JB Dunham & R Haggerty (2013) Descriptors of natural thermal regimes in streams and their responsiveness to change in the Pacific Northwest of North America. Freshwater Biology 58:880-894

Arismendi I, M Safeeq, SL Johnson, JB Dunham & R Haggerty (2013) Increasing synchrony of high temperature and low flow in western North American streams: double trouble for coldwater biota? Hydrobiologia 712:61-70

Vargas-Chacoff L, L Quilodrán, C Bertrán, I Arismendi, P Fierro, J Tapia, F Peña-Cortés & E Hauenstein (2013) Food of rainbow trout and changes in soil use: the Chilean example. In: Trout: from physiology to conservation. Eds. S Polakof & TW Moon. Nova Science Publishers, NY, USA. pp.65-79


Arismendi I & D Soto (2012) Are salmon-derived nutrients being incorporated in food webs of invaded streams? Evidence from southern Chile. Knowledge and Management of Aquatic Ecosystems 405, 01

Arismendi I, SL Johnson, JB Dunham, R Haggerty & D Hockman-Wert (2012) The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States. Geophysical Research Letters 39:L10401. Highlighted in ScienceDaily May, 2012

Arismendi I, J González, D Soto & B Penaluna (2012) Piscivory and diet overlap between two non-native fishes in southern Chile. Austral Ecology 37(3):346-354


Arismendi I, J Sanzana & D Soto (2011) Seasonal age distributions of introduced resident rainbow trout (Oncorhynchus mykiss Walbaum) reveal lake-inlet fish movements in southern Chile. Annales de Limnologie - International Journal of Limnology 47:133-140

Arismendi I, B Penaluna & D Soto (2011) Body condition indices as a rapid assessment of the abundance of introduced salmonids in oligotrophic lakes of southern Chile. Lake and Reservoir Management 27(1):61-69

Dunham JB, R Jr Hoffman & I Arismendi (2011) Practical guidelines for monitoring movement of aquatic organisms at stream-road crossings: Stream Notes, U.S. Forest Service Rocky Mountain Research Station, pp. 1-7


Vargas PV, I Arismendi, G Lara, S Peredo & J Millar (2010) Evidence of niche overlap between juvenile introduced Chinook salmon (Oncorhynchus tshawytscha, Walbaum, 1792) and native catfish (Trichomycterus areolatus, Valenciennes, 1842) in the Allipén river, Chile. Revista de Biologia Marina y Oceanografia 45(2):285-292

Marr SM, MP Marchetti, JD Olden, E García-Berthou, DL Morgan, I Arismendi, JA Day, CL Griffiths & PH Skelton (2010) Freshwater fish introductions in Mediterranean-climate regions: are there commonalities in the conservation problem? Diversity and Distributions 16(4):606-619


Arismendi I & B Penaluna (2009) Native inland fishes of Southern Chile. A bilingual field fish guide (Spanish/English). Universidad Austral de Chile-Valdivia. Funded by ICM Mideplan, Chile. 52 pp

Arismendi I, D Soto, B Penaluna, C Jara, C Leal & J León-Muñoz (2009) Aquaculture, non-native salmonid invasions, and associated declines of native fishes in lakes of the northern Chilean Patagonia. Freshwater Biology 54:1135–1147

Penaluna B, I Arismendi & D Soto (2009) Evidence of interactive segregation between introduced trout and native fishes in Northern Patagonian Rivers, Chile. Transactions of American Fisheries Society 138:839-845

Lara A, C Little, R Urrutia, J Mcphee, C Álvarez-Garretón, C Oyarzún, D Soto, P Donoso, L Nahuelhual, M Pino & I Arismendi (2009) Assessment of Ecosystem Services as an opportunity for the Conservation and Management of Native Forests in Chile. Forest Ecology and Management 258:415-424


Arismendi I, P Szejner, A Lara & ME González (2008) Impact of beaver on Nothofagus pumilio riparian forest structure in Tierra del Fuego, Chile. Bosque 29(2):146-154 (In Spanish)

Astorga MP, Valenzuela C, Arismendi I & JL Iriarte (2008) Naturalized Chinook salmon in the northern Chilean Patagonia: Do they originate from salmon farming? Revista de Biologia Marina y Oceanografia 43(3):669-674


Arismendi I & L Nahuelhual (2007) Non-native salmon and trout recreational fishing in Lake Llanquihue, southern Chile: Economic benefits and management implications. Reviews in Fisheries Science 15:311-325

Arismendi I (2007) Stable isotopes as potential deforestation indicators in watersheds. Bosque 28(3):183-186 (In Spanish)

Soto D, I Arismendi, Di Prinzio C & F Jara (2007) Establishment of Chinook salmon (Oncorhynchus tshawytscha) in Pacific basins of Southern South America and its potential ecosystem implications. Revista Chilena de Historia Natural 80(1):81-98


Soto D, I Arismendi, J González, J Sanzana, F Jara, C Jara, E Guzman & A Lara (2006) Southern Chile, trout and salmon country: invasion patterns and threats for native species. Revista Chilena de Historia Natural 79:97-117

Cuevas J, D Soto, I Arismendi, M Pino, A Lara & C Oyarzún (2006) Relating land cover to stream properties in southern Chilean watersheds: trade-off between geographical scale, sample size, and explicative power. Biogeochemistry 81(3):313-329

    Cuevas J, J León, I Arismendi & D Soto (2006) Riparian vegetation occurrence as a function of biotic and abiotic variables in rivers of Southern Chile. Gayana Botánica 63 (Supplement):30 (In Spanish)


    Soto D & I Arismendi (2005) Ichthyic fauna of Bueno River basin: affluent relevance in native species conservation. In: Smith-Ramírez C, J Armesto & C Valdovinos.(Eds.) Ecology and biodiversity in forest of coastal corridor of Chile. pp.390-398. Editorial Universitaria, Chile (In Spanish)

    Iriarte JL, C Rodriguez, C Uribe, C Rivas, C Leal, I Arismendi, H González, R Quiñonez & R González (2005) Reoccurring events of harmful algae bloom in inner sea of Chiloe: Importance of nitrogen dissolved nutrients. Biological Research p. R-118 (In Spanish)

    Awards and Honors

    Advisory Board of Limnologica ISSN: 0075-9511 Elsevier

    Fun Fact

    Latin-American music, Patagonian cuisine, photography, soccer