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Common names include coast redwood, coastal redwood and California redwood. It is an evergreen , long-lived, monoecious tree living 1,200–2,200 years or more. [ 4 ] This species includes the tallest living trees on Earth, reaching up to 115.9 m (380.1 ft) in height (without the roots ) and up to 8.9 m (29 ft) in diameter at breast height .
Redwood National and State Parks as 120,000 acres (49,000 ha) of public lands, 80,000 acres (32,000 ha) of this land were commercially logged in the past. [3] About 96 percent of the world's old-growth coast redwood forest has been logged. The work is being done in the California Coast Ranges in North Coast of California's Redwood forests. [4]
However it is asserted that the basal bark of the "General Sherman" Big Tree is in places up to 1.2 m (4 ft) in thickness. [144] This could be determined non-invasively with sonograph equipment. Coast Redwood (Sequoia sempervirens) Coastal Northern and Central California and extreme southern Oregon.
It is believed that the unique combination of coastal fog and ample sunlight in the inland East Bay provides optimal growth conditions for redwoods. [2] A tributary connects with the main stem of Redwood Creek in Contra Costa County, CA (March 12th, 2023) San Leandro Creek courses through the Redwoods during a spring rainstorm.
The dominant forest type in this ecoregion is the coastal redwood forest. These are the tallest forests on Earth, with individual redwood (Sequoia sempervirens) trees reaching heights of 100 metres (330 ft). These forests are generally found in areas exposed to coastal fog.
The park consists of 9,500 acres (3,800 ha) of redwood trees, including several groves of old growth trees. One of the groves, totaling 5,000 acres (2,000 ha), includes the world's largest (not tallest) coast redwood, which measures 20 feet (6.1 m) in diameter and 340 feet (100 m) tall.
[4] [5] The redwoods contained in today's regional park are third-growth trees, many of which are over 100 years old. Only one old-growth redwood remains in the area, a 93 feet (28 m) tall tree that seems to grow miraculously out of a rock on a cliff face near Merritt College, which may have survived because it was out of reach for loggers. [2]
It is part of the Northern California coastal forests ecoregion and has 23,600 acres (96 km 2) of old-growth forests. [2] 17,000 acres (69 km 2) are old-growth redwoods, comprising the entire Bull Creek watershed and the Rockefeller Forest. [3] Only 5% of old coastal redwood forests remain. [4]