Learn more about this research. They expected that evergreen leaves, which are thicker, would show fewer signs of water stress. Dr. William Russell, Dr. Joe McBride, and Ky Carnell have found that old-growth coast redwood forest reserves with areas larger in proportion to the length of their perimeters suffer fewer negative effects from exposed edges. Researchers at San Jose State University wondered how long it takes for a forest to truly recover after clear-cutting, and decided to approach the question by comparing forests in different age classes. So you're going to have very rapid regeneration from asexual reproduction, which is the resprouts. While most animals live on the Earth’s surface, this well-hidden amphibian travels mostly up and down in the rocks and soil. The dried cones that remain on the treetops for long lengths of time often release their seeds—which are dispersed by wind—before falling go from the tree. Prior to this study, little was known about the bat community in Yosemite’s three giant sequoia groves and virtually nothing was known about how bats use the canopy in any of the Parks’ forests. A five-year study led by Elena West and Zachariah Peery from the University of Wisconsin, and sponsored by Save the Redwoods League and other organizations, has proven that Steller’s jays’ appetite for human food is a major problem. And its nutritious acorns feed bear, deer, rodents and birds. More than 30 years ago, giant sequoia seeds were collected in 23 groves representing the species’ range from north to south in the Sierra Nevada. It’s no coincidence that redwoods live in the thickest part of “California’s fog belt.” The presence of coastal summer fog has long been regarded a necessary ingredient for the health and perpetuation of coast redwood ecosystems. Being dwarfed by Earth’s most massive tree, the giant sequoia (aka “Sierra redwood”), fills you with wonder. In a forest of towering redwoods, the small creatures scurrying underfoot and splashing into streambeds sometimes go unnoticed as visitors crane their necks toward distant treetops. This struggle begins a process that limits tree growth, according to a team of researchers studying redwoods in Prairie Creek and Humboldt Redwoods State Parks. Giant sequoias are sometimes simply referred to as “big trees” and with good reason: They are the largest trees by volume and among the largest living things on Earth. They need ancient forests—and used to thrive in the coast redwoods of California. Giant sequoias are the third longest-lived tree species, the only older trees are are bristlecone pines, the oldest one being nearly 5,000 years old, and Alerce trees … We should look down, though, say researchers from the Redwood Sciences Laboratory, who visited several state parks to study the ecosystems that surround and support those mighty trees. Tanoak (Notholithocarpus densiflorus) grows in coastal forests in Oregon and California. It’s well known that these hangers-on thrive in the old-growth Douglas-fir forests of Oregon and Washington, in places amassing the weight of two concert grand pianos per acre. So he asked Save the Redwoods League to fund research to figure out what was going on. Gifts are tax deductible to the fullest extent of the law. Is it possible, though, that just one tree could benefit an ecosystem enough to warrant individual protection? Down slope of the ridge top it is not uncommon to see regenerating redwood trees mixed amongst manzanita and chinquapin. Save the Redwoods League is a 501(C)(3) nonprofit organization. Learn more about this research. Though common in chaparral, manzanitas can also eke out a living on the edges of coast redwood forests. In the winter, however, he began to catch females right away. Learn more about this research. Finding all of this information was considerably more challenging until Deborah Rogers, a research geneticist and conservation biologist with the Genetic Resources Conservation Program at the University of California, Davis, stepped in to organize a bibliography of scientific materials written about coast redwoods in the past 50 years. But the redwood was nearly indestructible. Learn more about this research. Humboldt State University and California State Parks research studies new approaches to variable-density thinning across the entire Mill Creek property. “One year later, even large trees where all the foliage … Both as shrubs and mid-sized trees, tanoaks are an important element in Central California’s coast redwood forests. But no one knew for sure whether they represented typical redwood forests—or just the ones with the most interesting or abundant redwoods. Coast redwood are adapted to fire and other disturbance. But how do you move toward old-growth characteristics most efficiently? Learn more about this research. Learn more about this research. Learn more about this research. The coho salmon population in Del Norte County’s Mill Creek depends heavily on the quantity and quality of winter habitat for survival, according to a study by The Rowdy Creek Fish Hatchery and a team of fisheries biologists. Recent League-funded research by Richard Dodd, an Environmental Science Professor at the University of California, Berkeley, confirms that northern groves (north of the Kings River drainage) have lower genetic diversity than central and southern groves. Today the Humboldt marten, the coastal subspecies of the Pacific marten in California, has vanished from more than 95 percent of its former range. The two questions she has asked are: “Are privately owned forests more likely to be protected if they are on bigger parcels?” and “Do traditional, rural land uses as opposed to traditional, residential land uses promote forest preservation?” Answers to these questions might help predict the likelihood of future, private redwood forest protection and—of logged forests—regeneration. This bark has high water content, which also helps prevent it from burning easily. A US Forest Service ecologist, Weller decided to check out his own backyard: the redwood forests of Northwest California. In the upper reaches of their crowns, coast redwoods struggle to lift water and nutrients into their leaves. Eric Draper/AP. During drier summer months fog supplies trees with moisture and blocks the evaporating rays of direct sunlight, reducing the amount of water that redwoods lose via transpiration. Learn more about this research. In the past 70 to 80 years, most fires in California’s coast redwood forests were prevented or suppressed. Researchers believe that fires burned through most redwood forests every six to twenty-five years; in other words, it was a normal occurrence. From time to time, a resident in Humboldt County will submit a report claiming to have spotted a Pacific fisher or a Humboldt marten. Now, thanks to Save the Redwoods League, Mill Creek is protected as part of Del Norte Coast Redwoods State Park and is becoming a laboratory for redwood forest restoration. Species that don’t need disturbances tend to be shade tolerant, slower growing and longer lived. It’s likely that Pacific fisher (Martes pennanti pacifica) populations are well distributed in Northern California’s Redwood National and State Parks (RNSP) for the same reason that Humboldt martens (Martes americana humboldtensis) have disappeared, according to research done by Keith Slauson, William Zielinski, and Gregory Holm. What is not normal, is the lack of wildfires in the redwood forest. What’s less understood, however, is exactly how fog frequency has varied in the past century and how redwoods have responded to this variation. In addition, they combined observations from this study and others to describe the natural history of Yosemite’s 18 bat species. Learn more about this research. These large, erect, dead trees may remain standing for decades, or even centuries. Learn more about this research. Mary Jo Mazurek and William Zielinski report evidence that suggests legacy old-growth redwoods can do just that. Learn more about this research. Learn more about this research. The Sierra Redwood seed is small, flat, and very light, and it requires mineral soil for successful germination. York, along with his graduate advisor, John Battles, is working on unlocking the secrets to growing new giants. Learn more about this research. Learn more about this research. Did fires give one species an edge over the other? Learn more about this research. Learn more about this research. Second-growth forest habitats that cover a majority of the park are fishers’ sweet and martens’ sour. Learn more about this research. Learn more about this research. Interested in their response to drought, they chose midsummer, just before the deciduous ferns would shed their leaves, in the drier southern part of coast redwoods’ range (in the Santa Cruz Mountains and Big Sur). These trees aren't only good at fending off forest fires because of their thick trunk, which holds a lot of water on the inside of the tree, but the tannins ward of any insects, fungus and diseases that will try to damage the tree.