Archive for the ‘trees’ tag
Follow a tree through its journey into spring! Citizen scientists can record budbursting, leafing and flowering with Track a Tree as seasons shift in the United Kingdom.
by Nina Friedman
As Citizen Science projects proliferate, so do the curious communities they create. Relationships begin between excited, everyday people as they explore their surroundings for the sake of science. But there is one United Kingdom based project that inspires the inception of a particularly odd relationship…
Track a Tree asks volunteers to visit their local woodlands, select a tree, and record seasonal events as they take place in the immediate ecosystem of the tree. Through recurring visits and focused observation volunteers become familiarized with the tree’s particularities. Maybe it’s the final Sycamore in the area to leaf. You, a volunteer, root for it to catch up with its peers, literally the parent of a late bloomer. You invest yourself in seasonal transitions, gaining insight into the life of the tree, surrounding flowers, and sometimes surrounding animals.
You become a scientist of phenology, the study of the seasonal-ecosystem interaction. Phenology observes timing variations seasonal events, and the resulting affect on plant and animal life. Recent rapid shifts in the earth’s climate make phenology evermore interesting and important. Tree’s that thrive in an April-June springtime may lose health if temperatures unexpectedly rise in March, triggering early blooming. When the Forestry Commission has access to ecological data, they can make informed decisions when harvesting and planting trees. When you have access to ecological data, you can learn about the nature that surrounds you. You can also create and play with interactive infographics.
Christine Tansey, the founder of Track a Tree, relayed the project’s impressive growth. “We expected a smaller, more dedicated group of participants because it requires a bit more commitment than other citizen science projects,” she says. Most ecological projects do not require multiple visits to the same location. Volunteers prove to be excited about the committing task. Since its launch in 2014, submissions include 2,000 observations spanning over 200 woodlands. Participants include school age students, families and individuals. Couples are also among the ranks. Tree tracking happens to be a great bonding activity, with the benefit of being lower commitment and lower cost than cat adoption and child rearing.
Steve Hallam (part-time tree tracker and full-time father) finds free moments to volunteer for several conservation projects in the UK. When life’s unexpected challenges arise, Steve finds routine and peace in data collection. “Gathering data on my trees forces me to stay quietly in one place for a few minutes- and it’s amazing what wildlife can make itself visible whilst this occurs,” he says. Local Nuthatches regularly make appearances while he scribbles the status of his Silver Birch.
One citizen scientist, a self-proclaimed “wayward botanist”, shares the tree tracking experience through sound. With every outing comes an audio upload.
Christine loves the unique way each volunteer approaches his or her experience. “They’re all following the outline of the project, but they’re able to individualize it and explore their own interests at the same time”. Christine aims to “give all [volunteers] the chance to hone their observation skills”. This goal is mutually beneficial. Years into her ecology research, she still notices new aspects of nature every time she goes into the field, attributing this to the volunteers fresh perspectives.
Ultimately, Track a Tree would like not only to collect data, but to educate citizen scientists. If UK woodlands are inaccessible to you visit the Track a Tree resource page to learn about tree identification. Or visit SciStarter’s Project Finder and use the “location” function to explore ecology underneath your local canopies!
Citizen scientists collect data to find out how climate change impacts redwoods
by Kristin Butler
“The redwoods, once seen, leave a mark or create a vision that stays with you always. No one has ever successfully painted or photographed a redwood tree. The feeling they produce is not transferable. From them comes silence and awe. It’s not only their unbelievable stature, nor the color which seems to shift and vary under your eyes, no, they are not like any trees we know, they are ambassadors from another time” John Steinbeck, Travels with Charley: In Search of America.
Anyone who’s ever been in a redwood forest knows the sacred experience Steinbeck described in his famous book. Even my dog Kia, on her first hike along the hooded trails of Sanborn Park near our home, bowed uncertainly at the hush of that forest’s redwoods and gazed with wonder at its canopied sky. While photos may fail to replicate the stature of these magnificent trees, they can help conservationists protect them.
Five years ago, a nonprofit in San Francisco called Save the Redwoods League (which buys, protects, and restores redwood habitat) started a citizen science projected called Redwood Watch. Volunteers in the project take photos of redwoods using an app called iNaturalist and the data they collect is helping conservationists better understand redwood distribution and take strategic measures to protect these iconic trees.
“You’d think we’d know where every redwood tree is, but we don’t,” said Deborah Zierten, Education and Interpretation Manager for the Save the Redwoods League. “This projects helps us refine our maps.” The Save the Redwoods League, which is heading into its centennial anniversary soon, will use the data from Redwood Watch to create restoration plans for the organization’s next 100 years, Zierten said.
In particular, the organization is interested in understanding how climate change may be impacting redwoods and their ecosystems and how to help the trees adapt and survive, she said. In California, Redwoods grow within a narrow 450-mile strip that hugs the coast from Big Sur to just over the Oregon border. In the winter months, the trees rely on rainfall and in summer they get the water they need by absorbing coastal fog through their needles and roots, Zierten said. This could make them vulnerable to drought and temperature changes.
Interestingly, redwoods are one of the best protections the planet has against climate change.
Old growth redwoods (trees that are over 200 years old and that survived the gold rush of logging) can take in three to five times more carbon from the atmosphere than any other force on the planet, Zierten said, making them one of the best carbon sinks. Their high branches are so dense, intertwined, and coated with decomposing needles that new trees actually take root and grow on them high above the ground. Of the original coastal redwood range, only about 5% of the old growth forest is left. In addition, 26% of redwood timberland habitat (forests that have been logged and replanted) has been lost to roads and other development.
“One of our goals is to make sure the remaining forests remain protected,” she said, against development, fire, invasive species, and other threats. The Save the Redwoods League encourages volunteers to not only photograph redwoods, but to also photograph the plants and animals that rely on old growth and newer timberland redwood forest ecosystems. These include threatened species such as the Spotted Owl and Marbled Murrelet; Black Bears and Pacific Salmon; the Pacific Fisher; the Marten; and plants like Huckleberry and many types of lichen.
Volunteers have already collected more than 2,000 observations and the organization plans to continue the project well into the future to preserve these awesome, silent “ambassadors from another time.”
Kristin Butler is a Bay Area journalist and Outreach and Communications Director for the San Francisco Bay Bird Observatory.
If you’re looking for more projects for the holiday season, we’ve got 12 Days of Citizen Science for you!
Don’t forget to check out the public radio segment about Tiny Terrors on WHYY’s The Pulse!
The Grinch is back and this time in the form of a tiny insect invader. Meanwhile, scientists are looking for the one tree… that will save Christmas. Ok, dramatics aside, this is only half wrong. Eastern Hemlock, balsam, and Fraser fir are three evergreen trees that dominate large swaths of terrain across Eastern America dying from the attack of two invasive pests. One, the balsam woolly adelgid or Adelges piceae, has had a devastating impact on Fraser fir and balsam fir, trees you may recognize in your living room if you celebrate Christmas. Eastern hemlock trees dying from the hemlock woolly adelgid, otherwise known as Adelges tsugae, are also leaving behind bald patches on a damaged forest landscape.
The key to preserving our forests? Scientists at North Carolina State University and in the Alliance for Saving Threatened Forests believe that a particular tree or rather some particular groups of trees might be the solution. The idea is that there may be trees within each species that have a natural resistance to the adelgid that most trees in America don’t have.
This is part of the reason why hemlocks and firs are dying in such large numbers. The Balsam woolly adelgid is originally from central Europe and the hemlock woolly adelgid is from East Asia, where native trees have evolved resistance or tolerance to adelgid infestation. But the trees in the U.S.? Dr. Fred Hain, an entomologist at North Carolina State University, says they have had “no co-evolution [with the adelgid] and the trees do not show any resistance and are very susceptible. And also, there are no natural enemies in this system to keep pests under control.” But there may be trees in our native range are lucky enough to have some form of resistance to the adelgid; we just haven’t found them yet. As it turns out, they’re extremely hard to find. “It’s like looking for a needle in a haystack,” Dr. Hain says.
This is where the Tiny Terrors Project (official site) enters. Led by Dr. Hain and grad student Erin Mester, the Tiny Terrors project is a piece of the Alliance for Saving Threatened Forests that enlists the help of citizen scientists to find those resistant trees. With so much land to cover and so many trees to see, citizen scientists can provide a significant boost to the search for resistant trees. Hain and Mester ask volunteers to try and identify resistance by finding trees that have very few or no adelgid in infested areas. The team will then try to get either a cone, if possible, or clippings from the tree to run experiments on.
The first thing they need to do is determine whether or not the tree has been treated with chemical pesticides, since that would make a tree appear to be resistant even if it actually has no natural resistance. Then, if the tree hasn’t been washed or injected with pesticides, then the scientists will grow seedlings from a cone or try to clone the tree from cuttings and expose it to adelgid to see if it really is resistant. If the adelgid doesn’t take, or if the trees survive the infestation, then it becomes a task of understanding what the cause of resistance is. “So far, we’ve identified a thicker cuticle of the needle as being critical,” Dr. Hain says, meaning the few trees the Tiny Terrors project has pulled up as promising appear have a thicker skin. This makes it more difficult for adelgids to penetrate the tissue. This hypothesis also seems to be supported by the fact that trees native to central Europe and Asia have this adaptation as well.
Hopefully, scientists like Hain and Mester will be able to transfer the resistance genes over to other hemlocks or firs if they’re able to find those special trees. Unfortunately, even this is easier said than done. A similar story played out on the continent in the early 20th century, when a fungal infection called the chestnut blight nearly wiped out the American chestnut. Chinese chestnut varieties had a natural form of resistance to the blight, and scientists tried then to create a viable hybrid between Chinese and American trees to combat the blight. By breeding that hybrid with other surviving American chestnut trees for many generations, scientists were finally able to create a blight-resistant tree that had 98% American genes and 2% Chinese genes. But that wasn’t until nearly seventy years after the blight had decimated the population of chestnuts in America. At this point, much of the original genetic diversity of the American chestnut is gone forever, and it’s unclear whether or not chestnuts will ever return to the full extent of their former distribution.
This could happen for Fraser and Balsam firs as well, should nearly all of the population of trees be killed. Fortunately for hemlocks, however, an organization called Camcore has been stockpiling a bank of hemlock seeds for the purpose of preserving their genetic diversity. But Fraser firs may not be so lucky since not as many people are looking out for them, despite Christmas trees occupying a nearly 1 billion dollar industry.
While none of these trees are important as timber, hemlocks are what is known as a keystone species and have a disproportionate impact on the ecosystem. “The ecological impact,” Dr. Hain says, “could be quite traumatic.” For instance, hemlocks are often found by streams and provide a good deal of shade. This shade might be critical to keeping the water temperature down, which is already reaching the thermal limit for trout in the south. The loss of that shade could also ruin the habitat for trout.
The Tiny Terrors project is just getting on its feet. But, if it’s successful, it could help prevent the deaths of many conifer forests and the life depending on them. That success hinges on a number of things, including whether or not naturally resistant trees exist and if a successful hybrid can be made, but most importantly on how many people volunteer as citizen scientists. Dr. Hain believes that the project will move forward, as more people spread the word. In any case, Christmas is probably still on this year with a Fraser fir and, who knows, maybe a trout. But in the future, people may have to find alternatives.
Angus Chen is the managing editor for the SciStarter Blog network which includes the Discover magazine “Citizen Science Salon” blog and the Public Library of Science’s Cit Sci blog. He’s also a freelance reporter and producer at WNYC Public Radio on “The Takeaway” with Public Radio International and the NY Times. You can also read his work with Science magazine. He was once a scientist studying geology and ecology, but now spends his days typing and scribbling and sketching furiously.