Hourly - Research Professor Ecology
Dr. Sada’s primary research interest examines the relationships between environmental factors and the structure and function of arid land aquatic invertebrate and vertebrate communities. He also works on aquatic mollusk biogeography and taxonomy, habitat preference of rare aquatic animals in springs, and designing management programs for isolated wetlands species. He recently completed inventorying more than 1,100 springs in Joshua Tree and Death Valley National Parks, Grand Canyon-Parashant National Monument, and Lake Mead National Recreation Area. In the late 1990s, he prepared the Owens Basin Wetland and Aquatic Species Recovery Plan, Inyo and Mono Counties, California, and inventoried Owens Valley, California, springs for the City of Los Angeles, Department of Water and Power.
Dr. Sada is an applied ecologist and often assists government agencies, public utilities, and private organizations develop strategies that minimize environmental influences of land-use practices. His current work includes examining effects of human and natural disturbances on aquatic macroinvertebrate abundance and community structure in arid land springs, spring inventories throughout Nevada and California, developing spring survey protocols for the National Park Service and Bureau of Land Management, and revising the recovery plan for the Shortnose and Lost River Suckers. In other recent work he has examined the effects of increased discharge on trout communities in Sierra Nevada streams, guided baseline studies to assess the efficacy of restoration programs in the lower Truckee River, conducted spring and springsnail surveys throughout large portions of the southwest, and organized and developed an environmental and biotic database of approximately 4000 springs in the arid west.
||University of Nevada, Reno
||California State University, Long Beach
||University of the Pacific, Stockton CA
- Graduate Program of Hydrologic Sciences University of Nevada Reno
Environmental Characteristics of Great Basin and Mojave Desert Springs, Unpublished report to U.S. Fish and Wildlife Service. The Great Basin Landscape Conservation Cooperative
Factors affecting spatiotemporal benthic macroinvertebrate diversity and secondary production in a semi-arid watershed
, Journal of Freshwater Ecology
, 30 (2), 197-214, 10.1080/02705060.2014.974225
, , , (2015).
Spatial and temporal pattern in length-mass regressions of freshwater gastropods in Nevada spring ecosystems, Malacologia, 58 (1-2), 167-177
, , (2015).
Using benthic indicator species and community gradients to optimize restoration in the arid, endorheic Walker River watershed, western U.S. River Research and Applications. doi: 10.1002/rra.2765, River Research and Applications, doi:10.1002/rra.2765
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Surface water hydrology and geomorphic characterization of a playa lake system: Implications for monitoring the effects of climate change, Journal of Hydrology, 510, 92-101
Climate change and the fate of desert springs, EOS, 94, 114
, , (2013).
The late Holocene dry period: multiproxy evidence for an extended drought during 2800 and 1850 cal yr BP across the central Great Basin, USA, Quaternary Science Reviews, 78, 266-282
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Elemental stoichiometry of basal resources and benthic macroinvertebrates along a land use gradient in a Great Basin watershed, Hydrobiologia, 716 (1), 115-129
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PAM IV Final Report: Evaluation of the effectiveness of linear anionic polyacrylamide (LA-PAM) when used to reduce seepage in unlined irrigation canals within the 17 Western States. 2009., Report to USBR.
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Synecology of a springsnail (Caenogastropoda: Hydrobiidae) assemblage in a western U.S. thermal spring province, The Veliger, 50, 59-71
Distribution and recovery of vegetational assemblages in Ash Meadows National Wildlife Refuge, Nevada, The Southwestern Naturalist, 53, 326-334
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Evaluation of Linear Anionic Polyacrylamide (LA-PAM) Application to Water Delivery Canals for Seepage Reduction
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Origin and diversification of the Soldier Meadow springsnails (Hydrobiidae: Pyrgulopsis), a species flock in the northwestern Great Basin, United States., Journal of Molluscan Studies, 73, 167-183
, , (2007).
Effects of environmental heterogeneity and disturbance on the native and non-native flora of desert springs., Biological Invasions, 8, 1091-1101
, , (2006).
Land use and land cover change as it relates to groundwater conditions in the Ash Meadows National Wildlife Refuge from 1948 to 2004, JAWRA
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Associations among spring-dependent aquatic assemblages and environmental and land use gradients in a Mojave Desert mountain range, Diversity and Distributions, 11, 91-99
, , (2005).
Prospects for recovering endemic fishes persuant to the U.S. Endangered Species Act, Fisheries, 30, 24-29
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Fish Community and Stream Habitat Relationships, Eastern Lake Tahoe Basin, Nevada, DRI Report No. 41217
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Baseline Hydrologic and Biological Monitoring, McCarran Ranch Restoration Project, Lower Truckee River, Nevada (2003-2004), DRI Report No. 41220
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Conference Proceedings. Spring-fed Wetlands: Important Scientific and Cultural Resources of the Intermountain Region, 2002, DRI Report No. 41210
Carlin Trend Springsnail Surveys, Elko, Eureka, and Lander Counties, Nevada, DRI Report No. 41181
, , (2002).
Distribution of Springsnails (Family Hydrobiidae) Inland Feeder Project Area, San Bernardino County, California, DRI Report No. 41175
Climate change, reduced discharge, and thermal variability in the spring headwaters of the Muddy river. Devils Hole Workshop: Beatty, NV, May 3, 2017-May 5, 2017
Impacts of Reduced Discharge on the Thermal Habitat of a Desert Spring Brook
, Abstracts with Programs
, 48 (7). Geological Society of America Annual Meeting: Denver, Colorado, September 25, 2016-September 28, 2016, 188-4, 10.1130/abs/2016AM-284355
Physical thresholds as ecological proxies in aquatic ecosystems. AGU: San Francisco, CA, December 14, 2015-December 18, 2015, Abstract No. #H11E-1401
Aquifer provenance, flow pathways, landscape setting and BMI community relationships in Great Basin and Mojave Desert springs. Nevada Water Resources Association Conference: Reno, NV, December 9, 2015-December 11, 2015
Integrating physical and ecological methods to assess changing spring-fed aquatic ecosystems. Science for Parks and Parks for Science: Berkeley, CA, March 25, 2015-March 27, 2015
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Physical thresholds as ecological proxies in aquatic ecosystems. American Geophysical Union Fall Meeting: San Francisco, Calif., December 14, 2015-December 18, 2015, H11E-1401
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Biotic Indicators of Arid Land Spring Reference Conditions. Desert Fishes Council: Flagstaff, AZ, November 14, 2013-November 16, 2013
Great Basin riparian and aquatic ecosystems, 49-52. Collaborative Management and Research in the Great Basin. Examining issues and developing a framework for action: Reno
Benefits and Risks of Using Linear Anionic Polyacrylamide (LA-PAM) for Seepage Reduction in Unlined Water Delivery Canals, GC43C-0747. AGU: San Francisco
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Ecological implications for Great Basin springsnail biogeography
Influence of temporal and spatial river temperature heterogeneity on nutrient cycling: Olympic Valley, California
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