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Vertical redistribution of zooplankton in an oligotrophic lake associated with reduction in ultraviolet radiation by wil...

Samuel S., Urmy Craig E., Williamson Taylor H., Leach Geoffrey Schladow Erin P., Overholt Joseph D., Warren

Published in Geophysical Research Letters

We used a natural experiment to test whether wildfire smoke induced changes in the vertical distribution of zooplankton in Lake Tahoe by decreasing incident ultraviolet radiation (UV). Fires have a variety of effects on aquatic ecosystems, but these impacts are poorly understood and have rarely been observed directly. UV is an important driver of z...

Seasonal nearshore sediment resuspension and water clarity at Lake Tahoe

Kristin E., Reardon Patricio A., Moreno-Casas Fabián A., Bombardelli Geoffrey Schladow

Published in Lake and Reservoir Management

Reardon KE, Moreno-Casas PA, Bombardelli FA, Schladow SG. 2016 Seasonal nearshore sediment resuspension and water clarity at Lake Tahoe. Lake Reserv Manage. 32:132--145. Motivated by management challenges due to declining water clarity at Lake Tahoe, California–Nevada, we synthesized field observations and modeling of wind-driven nearshore sedim...

Physical controls on the distribution of the submersed aquatic weed Egeria densa in the Sacramento-San Joaquin Delta and...

John Durand William Fleenor Richard, Mcelreath Maria, Santos Peter Moyle

Published in San Francisco Estuary and Watershed Science

The invasive aquatic plant Egeria densa (Brazilian waterweed) is a submersed aquatic plant that has expanded its distribution in both its native and introduced range. Because the plant grows so densely, it can become a problem for management of waterways and habitat restoration projects. It is difficult to remove once established and mechanical and...

Sentinel responses to droughts, wildfires, and floods: effects of UV radiation on lakes and their ecosystem services

Williamson, Craig E Overholt, Erin P Brentrup, Jennifer A Pilla, Rachel M Leach, Taylor H Schladow, S Geoffrey Warren, Joseph D Urmy, Samuel S Sadro, Steven Chandra, Sudeep ...

Published in Frontiers in Ecology and the Environment

Physical Control of Nonindigenous Aquatic Plants in Emerald Bay

Shaw, Dan W H Zach Hymanson Sasaki, T L

Published in Invasive Plant Science and Management

Rapid and highly variable warming of lake surface waters around the globe

Catherine M., O Reilly Sapna, Sharma Derek K., Gray Stephanie E., Hampton Jordan S., Read Rex J., Rowley Philipp, Schneider John D., Lenters Peter B., Mcintyre Benjamin M., Kraemer ...

Published in Geophysical Research Letters

In this first worldwide synthesis of in situ and satellite‐derived lake data, we find that lake summer surface water temperatures rose rapidly (global mean = 0.34°C decade−1) between 1985 and 2009. Our analyses show that surface water warming rates are dependent on combinations of climate and local characteristics, rather than just lake location, l...

Evidence of Landlocked Chinook Salmon Populations in California

Martin, Perales Jay, Rowan Peter Moyle

Published in North American Journal of Fisheries Management

Natural reproduction of adfluvial Chinook Salmon Oncorhyn-chustshawytscha has been documented in their native and introduced range but not in California, the southern end of their native range. A combination of anecdotal evidence and survey data suggests that successful spawning by Chinook Salmon reared in California reservoirs could be common. The...

Californias agricultural regions gear up to actively manage groundwater use and protection

Thomas Harter

Published in California Agriculture

New regulations are emerging in response to historic groundwater depletion and widespread groundwater quality degradation in California. They aim at long-term preservation of groundwater resources for use in agriculture, in urban areas and for the support of ecosystems in streams dependent on groundwater. The regulations are driving a historic shif...

Threat evolution: negative feedbacks between management actions and species recovery in threatened trout (Salmonidae)

Robert Lusardi Molly R., Stephens Peter Moyle Christy L., Mcguire Josh M., Hull

Published in Reviews in Fish Biology and Fisheries

Resource managers are often presented with dilemmas that require immediate action to avoid species extinction, but that also ensure species long-term persistence. These objectives may conflict with one another, resulting in new threats as initial threats are ameliorated. Such threat evolution is a common pattern in the long history of efforts to co...

Instream flows: new tools to quantify water quality conditions for returning adult Chinook salmon

Ann Willis Campbell, Amy M Fowler, Ada C Babcock, Christopher A Howard, Jeanette K Deas, Michael Andrew Nichols

Published in Journal of Water Resources Planning and Management

This paper examines the effect of implementing a water transaction program to address potential water quality limitations for returning adult fall-run Chinook salmon in a stream system where the agriculture is the dominant land and water use. Water transactions are becoming an increasingly used approach to provide instream flows during periods when...

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