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19. Assembly Rules and Novel Assemblages in Aquatic Ecosystems

T., Light Peter Moyle

Published in Biological Invasions in Changing Ecosystems

Rapid and highly variable warming of lake surface waters around the globe PDF available through Get Fulltext Research

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...

The aquatic trophic ecology of Suisun Marsh, San Francisco Estuary, California, during autumn in a wet year

R E, Schroeter Teejay, Orear Matthew Young Peter Moyle

Published in San Francisco Estuary and Watershed Science

Using stable isotopes of carbon (δ13C) and nitrogen (δ15N) and mixing models, we investigated the trophic levels and carbon sources of invertebrates and fishes of a large tidal marsh in the San Francisco Estuary. Our goal was to better understand an estuarine food web comprised of native and alien species. We found the following: (1) the food web w...

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 PDF available through Get Fulltext Research

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...

What If Californias Drought Continues?

Hanak, Ellen Jeffrey Mount Chappelle, Caitrin Jay Lund Josué Medellín-Azuara Peter Moyle Seavy, Nathaniel

California is in the fourth year of a severe, hot droughtthe kind that is increasingly likely as the climate warms. Although no sector has been untouched, impacts so far have varied greatly, reflecting different levels of drought preparedness. Urban areas are in the best shape, thanks to sustained investments in diversified water portfolios and con...

Functional Flows in Modified Riverscapes: Hydrographs, Habitats and Opportunities

Sarah Yarnell Petts, Geoffrey Schmidt, John Alison Whipple Beller, Erin Dahm, Clifford Goodwin, Peter Joshua Viers

Published in BioScience

Building on previous environmental flow discussions and a growing recognition that hydrogeomorphic processes are inherent in the ecological functionality and biodiversity of riverscapes, we propose a functional-flows approach to managing heavily modified rivers. The approach focuses on retaining specific process-based components of the hydrograph, ...

Economic Analysis of the 2015 Drought for California Agriculture

Richard Howitt Macewan, Duncan Josué Medellín-Azuara Jay Lund Sumner, Daniel

The drought is tightening its grip on California agriculture, squeezing about 30 percent more workers and cropland out of production than in 2014, according to the latest drought impact report by the UC Davis Center for Watershed Sciences. In 2015, the states agricultural economy directly will lose about 1.84 billion and 10,100 jobs because of the ...

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