scholarly journals Mercury and selenium accumulation in the Colorado River food web, Grand Canyon, USA

2015 ◽  
Vol 34 (10) ◽  
pp. 2385-2394 ◽  
Author(s):  
David M. Walters ◽  
Emma Rosi-Marshall ◽  
Theodore A. Kennedy ◽  
Wyatt F. Cross ◽  
Colden V. Baxter
Keyword(s):  
Food Web ◽  
Colorado River ◽  
Grand Canyon ◽  
Selenium Accumulation

scholarly journals Macroinvertebrate prey availability and food web dynamics of nonnative trout in a Colorado River tributary, Grand Canyon

2014 ◽  
Vol 33 (3) ◽  
pp. 872-884 ◽  
Author(s):  
Daniel P. Whiting ◽  
Craig P. Paukert ◽  
Brian D. Healy ◽  
Jonathan J. Spurgeon
Keyword(s):  
Food Web ◽  
Colorado River ◽  
Prey Availability ◽  
Grand Canyon ◽  
Food Web Dynamics

scholarly journals Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon

2020 ◽  
Vol 6 (20) ◽  
pp. eaaz4880 ◽  
Author(s):  
D. M. Walters ◽  
W.F. Cross ◽  
T.A. Kennedy ◽  
C.V. Baxter ◽  
R.O. Hall ◽  
...  
Keyword(s):  
Food Web ◽  
Food Webs ◽  
Species Interactions ◽  
Colorado River ◽  
Grand Canyon ◽  
Terrestrial Ecosystems ◽  
Species Traits ◽  
Functional Trait ◽  
Contaminant Exposure ◽  
Aquatic Food

Mercury (Hg) biomagnification in aquatic food webs is a global concern; yet, the ways species traits and interactions mediate these fluxes remain poorly understood. Few pathways dominated Hg flux in the Colorado River despite large spatial differences in food web complexity, and fluxes were mediated by one functional trait, predation resistance. New Zealand mudsnails are predator resistant and a trophic dead end for Hg in food webs we studied. Fishes preferred blackflies, which accounted for 56 to 80% of Hg flux to fishes, even where blackflies were rare. Food web properties, i.e., match/mismatch between insect production and fish consumption, governed amounts of Hg retained in the river versus exported to land. An experimental flood redistributed Hg fluxes in the simplified tailwater food web, but not in complex downstream food webs. Recognizing that species traits, species interactions, and disturbance mediate contaminant exposure can improve risk management of linked aquatic-terrestrial ecosystems.

Modeling of sand movement storage in the Colorado River through the Grand Canyon

Fact Sheet ◽  
1997 ◽  
Author(s):  
Stephen Mark Wiele
Keyword(s):  
Colorado River ◽  
Grand Canyon ◽  
Sand Movement

Rapids of the Colorado River, Grand Canyon, Arizona

1986 ◽  
Author(s):  
S.W. Kieffer
Keyword(s):  
Colorado River ◽  
Grand Canyon

POTENTIAL KNICKPOINT RETREAT ON THE COLORADO RIVER DUE TO HISTORICALLY LOW LAKE MEAD LEVELS, GRAND CANYON NATIONAL PARK

2017 ◽  
Author(s):  
Natalie Tanski ◽  
◽  
Edward R. Schenk ◽  
Benjamin W. Tobin
Keyword(s):  
National Park ◽  
Colorado River ◽  
Grand Canyon ◽  
Lake Mead ◽  
Grand Canyon National Park

ESTIMATING SAND THICKNESS FROM RIVERBED TO BEDROCK WITHIN THE COLORADO RIVER IN THE GRAND CANYON

2018 ◽  
Author(s):  
Andrew Platt ◽  
◽  
Daniel D. Buscombe ◽  
Ryan C. Porter ◽  
Paul E. Grams ◽  
...  
Keyword(s):  
Colorado River ◽  
Grand Canyon

A 4500-Year Record of Large Floods on the Colorado River in the Grand Canyon, Arizona

1994 ◽  
Vol 102 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Jim E. O'Connor ◽  
Lisa L. Ely ◽  
Ellen E. Wohl ◽  
Lawrence E. Stevens ◽  
Theodore S. Melis ◽  
...  
Keyword(s):  
Colorado River ◽  
Grand Canyon ◽  
Large Floods

Distribution and Movement of Humpback Chub in the Colorado River, Grand Canyon, Based on Recaptures

2006 ◽  
Vol 135 (2) ◽  
pp. 539-544 ◽  
Author(s):  
Craig P. Paukert ◽  
Lewis G. Coggins ◽  
Christopher E. Flaccus
Keyword(s):  
Colorado River ◽  
Grand Canyon ◽  
Humpback Chub
Sign in / Sign up

Export Citation Format

Share Document