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The Oaks 2040 survey estimates that 750,000 acres (3,000 km 2) of California oak woodlands are seriously threatened by 2040 as a burgeoning state population makes ever more use of the wildland. [12] This comprehensive survey includes oak woodland maps and inventory data for the ten oak types found in California.
Quercus ransomii Kellogg. Quercus douglasii, known as blue oak, is a species of oak endemic to California, common in the Coast Ranges and the foothills of the Sierra Nevada. [4] It is California's most drought-tolerant deciduous oak, [5] and is a dominant species in the blue oak woodland ecosystem. It is occasionally known as mountain oak and ...
Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]
The California Department of Parks and Recreation maintains over 270 protected areas, which include almost one-third of California's scenic coastline, including coastal wetlands, estuaries, beaches, and dune systems. The state parks system covers 1.3 million acres (5,300 km 2), with over 280 miles (450 km) of coastline, 625 miles (1,006 km) of ...
Quercus lobata, commonly called the valley oak or roble, is the largest of the California oaks. It is endemic to the state, growing in interior valleys and foothills from Siskiyou to San Diego counties. [4] Deciduous, it requires year-round groundwater, [5][6] and may live up to 600 years. Its thick, ridged bark (resembling alligator hide) and ...
The damage was less severe than the prior storm because the deciduous trees had lost their leaves. [12] In 2020, three fires impacted the preserve. The Apple Fire burned to Wilshire Peak. Fire crews protected the champion oak tree. [13] [14] The El Dorado Fire burned the north side of Oak Glen Preserve. A third fire destroyed the Los Rios ...
Quercus garryana is an oak tree species of the Pacific Northwest, with a range stretching from southern California to southwestern British Columbia. [3] It is commonly known as the Garry Oak, Oregon white oak or Oregon oak. It grows from sea level to an altitude of 690 feet (210 metres) in the northern part of its range, and from 980 to 5,900 ...
Jurupa Oak. The Jurupa Oak, or Hurungna Oak, [1][2] is a clonal colony of Quercus palmeri (Palmer's oak) trees in the Jurupa Mountains in Crestmore Heights, Riverside County, California. The colony has survived an estimated 13,000 years through clonal reproduction, [3][4][5] making it one of the world's oldest living trees. [5]