David Ward (Former Employee)
Science and Products
Eelgrass
Eelgrass is the predominant aquatic plant within embayments of southwestern Alaska and provides an important habitat for birds, fish, and invertebrates. The USGS has conducted extensive research on the status, trends, and use of eelgrass by migratory birds in southwestern Alaska primarily at the Izembek National Wildlife Refuge.
Effects of Water Clarity on Survival of Endangered Humpback Chub
Introduced rainbow trout and brown trout are considered a threat to the endangered humpback chub in the Colorado River in Grand Canyon. These introduced species eat native fish, but impacts are difficult to assess because predation vulnerability depends on the physical conditions under which predation takes place. We studied how predation vulnerability of juvenile humpback chub changes in response...
Science and Products
Eelgrass
Eelgrass is the predominant aquatic plant within embayments of southwestern Alaska and provides an important habitat for birds, fish, and invertebrates. The USGS has conducted extensive research on the status, trends, and use of eelgrass by migratory birds in southwestern Alaska primarily at the Izembek National Wildlife Refuge.
Effects of Water Clarity on Survival of Endangered Humpback Chub
Introduced rainbow trout and brown trout are considered a threat to the endangered humpback chub in the Colorado River in Grand Canyon. These introduced species eat native fish, but impacts are difficult to assess because predation vulnerability depends on the physical conditions under which predation takes place. We studied how predation vulnerability of juvenile humpback chub changes in response...