Water Dynamics
What was the model they used from 1984 to 2015?
Landsat 5 Thematic Mapper and Landsat 8 Operational Land Imager.
How did they construct Spring and Fall waterfowl migration chronology?
Bi-monthly aerial surveys collected from 1984 to 2015.
What two types of wetlands were encompassed within the 11.4 million ha of the northern Great Basin?
Palustrine and Riparian floodplains.
Name three waterbirds observed in the study.
Cinnamon teal, gadwall, northern shoveler, mallard.
According to the study, what percentage of semi-arid environments are wetlands?
1-3%
How were trends calculated within water years from Oct. 1st to Sept. 30th?
Landsat satellite imagery
What percent of the area in 2002 and 2003 were proportional abundance of waterfowl species was uniform in repeated surveys?
About 90%
What are the climate patterns characterized as?
Cold wet winters and hot dry summers.
Name two early-spring migrants.
American wigeon, Northern pintail
What years were included in the study?
1984 - 2015
Who was assigned ownership to for surface land ownership data using GIS?
Bureau of Land Management.
What seasons were the waterfowl survey data divided into?
Spring (Feb. 1st-April 30th) and Fall (Sept. 1st-Dec.15th)
The wetland flooding is induced by what?
Spring runoff from high-elevation snowmelt.
Name two data processing tools used.
R & QGIS
What is a major driver of habitat abundance seasonally?
Flood-irrigated hay meadows
How are annual wetland hydroperiods classified?
Six months or less= seasonally flooded, six months or more= semi-permanently or permanently flooded.
How were the results for the migration summarized?
Box plots showing lower (25%), middle (50%), and upper (75%) quartiles.
The area boundary was defined by combining watershed polygons and wetland footprints from what organization?
United States Geological Survey or (USGS)
How large was the sample site size objective?
11.4 million hectares
Which type of land help a higher mean abundance of seasonally flooded wetlands, public or private?
Private
Where was classifying seasonal wetlands accounted for?
Shallow fringe of endorheic lakes, reservoirs, and semi-permanent wetlands as a result of changing water elevation.
Why were the species box plots overlaid on graphs that contained the area estimates of wetland flooding?
To compare temporal alignment of migration and wetland pulse dynamics
What are the two reasons why regional wetlands act as important migratory hubs for waterbirds?
Connecting western North American wintering and breeding grounds.
What was Efficiency defined as?
When resource availability meets wildlife need.
What type of statistical analysis was ran for the box chart data?
polynomial regressions