Walker Ridge has been on my plant exploration list for many years. I had repeatedly heard about the rare plants, serpentine landscape, and epic wildflower displays that could be found along the ridge and in the adjacent Bear Valley. I also read about a proposal to designate the region as Serpentine National Park which, at the time, was a radical approach to try to halt a major wind turbine project slated for the ridgeline. I was excited to finally explore this place and to locate what has been called the largest stand of McNab cypress in the world. What I found was something entirely different.
Looking north toward Walker Ridge from the access road.
A sequence of five elevated marine terraces along Jug Handle Creek in coastal Mendocino County constitutes a nationally and internationally famous ecological staircase. So outstanding is the combination of canyons, terraces and ancient dunes, tall redwoods and firs, bishop pine forest and dwarfed pines and cypresses that…It has become a Mecca for naturalists, botanists, ecologists, pedologists (soil scientists), geographers and nature-oriented laymen. It is being praised as the best preserved ecological showplace of coastal landscape evolution anywhere in the northern hemisphere.
–Hans Jenny 1973
Throughout the Pleistocene, as the climate fluctuated, sea levels rose and fell in conjunction with the size of the polar ice caps thus allowing oceanic wave-action to cut coastal terraces around the world. Subsequent tectonic forces then slowly pushed these terraces upward. What we now witness in coastal Mendocino County is, as Jenny states, the best preserved ecological showplace of coastal landscape evolution in the Northern Hemisphere.
Mendocino Ecological Staircase
Through other dynamic processes, beach materials like sand, gravel, clay and other rock have been deposited on the terraces at varied depths. Directly adjacent to the Pacific Ocean on the first step, wind sculpts coastal scrub and grassland on coastal bluffs or “Bonsai” beach and bishop pine forests just inland. A bit further up the staircase, out of reach of the salty air, ample precipitation, Pleistocene and Holocene sand dunes, and deposition of nutrient-rich conifer needles offers the abiotic needs for trees with deep roots and tall shoots. However, the most amazing staircase story begins just to the east of the ancient dunes.
Gary Lester is an explorer. With each day’s journey he refines an understanding of the natural world that has been cultivated from an early age. Because of his keen sense of place he has made a multitude of significant ecological discoveries. Any one of these discoveries, considered alone, would be a lifetime’s achievement for some (like me) but seen together Gary’s findings are regionally paramount and set the bar high for naturalists everywhere. For example, in the fall of 2010, he and his wife Lauren identified a Brown Shike in coastal McKinleyville that created quite a stir for birders nationally (he has show this bird to people from across the North America all winter, including a man from Florida who gave him the slick Tampa Bay Rays hat he is sporting in the picture below). Clearly, Gary has a view of the world where the smallest details build the bigger picture. When a new element does not fit that picture a personal discovery is made.
Gary explains that, until 2002, tufted puffins regularly bred on the sea stacks viewed from Elk Head. He comes back to look each year but they have not yet returned to this historic breeding ground.
The Lost Coast presents plant associations (or lack of associates) that have long puzzled botanists. From the perspective of the conifer lover the question is: Why are redwoods, grand fir, and sitka spruce absent in an area which annually receives 100+ inches of rain, has some summer fog, and is nourished by soils from that of the central belt of the Franciscan Complex? These same conditions exist only a few mile north where redwood, grand fir, and Sitka spruce forests thrive. In the heart of this wilderness, over 20+ miles of walking, I found only two conifers. After and mentally and physically taxing journey I was left with a sense of wonder at the fortitude of the species that were present; and not the absence of the conifers unable to reside.
Panorama from King’s Peak where fire and life intertwine–where mixed-evergreen forest and coastal chaparral meet.
