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The average daily temperatures of Yuma, which is located near Arizona's southwestern corner, range from 43 to 67 °F (6 to 19 °C) in January, and from 81 to 107 °F (27 to 42 °C) in July. In Flagstaff, located in the state's central interior, the average daily temperatures range from 14 to 41 °F (−10 to 5 °C) during January, and from 50 ...
Jack mackerel caught by a Chilean purse seiner Fishing down the food web. Overfishing is the removal of a species of fish (i.e. fishing) from a body of water at a rate greater than that the species can replenish its population naturally (i.e. the overexploitation of the fishery's existing fish stock), resulting in the species becoming increasingly underpopulated in that area.
The Texas timber industry as a whole had, in fact, already peaked in 1907–1908. [29] By the 1920s, the forest lands in Texas had become severely depleted and most of the virgin pine had been cut. [1] [28] The lumber industry slowed substantially as lumber companies, whose properties were largely exhausted of timber, slowed or halted operations.
Gillespie Dam Highway Bridge – Gila Bend AZ – U.S. National Register of Historic Places – Waymarking.com; Historic American Engineering Record (HAER) No. AZ-69, "Gillespie Dam Bridge, Spanning Gila River on Old US 80 Highway, south of Gillespie Dam, Arlington, Maricopa County, AZ", 30 photos, 33 data pages, 3 photo caption pages
The overfishing list reflects species that have an unsustainably high harvest rate. NOAA also keeps a list of overfished stocks. Those are species that have a total population size that is too low.
The United States Geological Survey (USGS) operates a Puerco River stream gauge 1 mile (1.6 km) southwest of Chambers in Arizona. The maximum discharge recorded by this gauge between 1971 and 2009 was 17,800 cubic feet per second (500 m 3 /s) on Sept. 30, 1971, and the minimum discharge was often zero, from a drainage basin of 2,156 square miles (5,580 km 2).
The map below shows changes in the aragonite saturation level of ocean surface waters between 1880 and 2012. [107] To pick one example, pteropods are a group of widely distributed swimming sea snails. For pteropods to create shells they require aragonite which is produced through carbonate ions and dissolved calcium. Pteropods are severely ...
Almost 12 years ago, a pilot flying a small plane over the desert in Arizona spotted something she would never forget. Pez Owen told NPR that when she noticed white crosses on the ground, ...