Battle of the Bull Thistle

Another month has passed working with the folks here at the San Bernardino National Forest (SBNF). Time has flown, a testament to the fun I have had working in partnership with the Restoration team here. Despite the laughs shared in the field not every day has been a walk in the park, and this month was witness to a battle between us ecologists/botanists and the most angry non-native perennial herb one could imagine, Bull Thistle (Circium vulagre).

Stare down between myself (right) and some bull thistle (C. vulgare) (left) at Johnson’s Meadow.

We ventured out into the San Jacinto Mountains near Idyllwild, California arriving at a site known as Johnson’s Meadow. Equipped with serrated shovels, leather gloves, trash bags, and clippers in hand to go up against the large spikes of the thistles which are non-native to this riparian meadow nestled into the Southern California mountains. This area was identified as ecologically important due to the presence of a threatened species Scutellaria bolanderi ssp, austromontana a perennial herb native to California and found most commonly in wetland areas such as in the ephemeral stream that runs through this meadow.

Flowers of Southern skullcap (S. bolanderi ssp. austromontana) Source:Calflora: Information on California plants for education, research and conservation. [web application]. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: July 30, 2024).

Johnson’s Meadow also happens to be a grazing pasture for a local farmer’s cows, and therefore exclusion fences were put up around the identified population of southern skullcap (S. bolanderi) in order to prevent the cows from consuming this threatened species as a tasty snack. There are additionally milk weed populations (Asclepias eriocarpa) at the meadow that rely on native pollinators which are often just as enamored with the thistles as they are with the milk weed.

A female monarch butterfly (Danaus plexippus) decides a prickly bull thistle flower head makes for the perfect landing pad.

In order to combat the threat to local biodiversity that bull thistle poses, a group of forest service field techs, myself and Arturo with the CLM internship program, and Lance Woolley the district botanist for the San Jacinto side of the SBNF joined forces on a 3-day weeding spree. The meadow was full of tall, spiky thistle plants peeking up above the dense grasses and native California wild rose (Rosa californica) that filled much of the area. When we came up upon a thistle plant we first had to check if any of the flower heads had bloomed or gone to seed. If they had even bloomed (the purple puff sitting on top of that green spiky ball at the end of each stalk) we had to clip the flower head and place it into a trash bag for removal from the area. If the flower head had already gone to seed we did our best to remove these carefully without releasing the wind dispersed seeds into the surrounding areas. This process was difficult on its own due to the large spikes that cover every inch of a bull thistle from the stem, to the leaves, to the flower head. These spikes were often large enough to pierce straight through our pig-skin leather gloves. The only safe spot to grab a bull thistle is from the underground root once you’ve wrenched the sucker out of the ground. The process was made even more difficult due to bull thistles seeming preference of growing either next to huge patches of California wild rose (R. californica), stinging nettle (Urtica dioica), or if you are really lucky you can get the trifecta of all 3 pressed up next to each other!

An example of a bull thistle plant with both the purple flower head (front) as well as the brown/beige seed head (back) spotted in Johnson’s Meadow.

In total after 3 days of work and a crew of forest service employees, interns, and a crew from the Urban Conservation Corps, we were able to remove the vast majority of the bull thistle biomass from Johnson’s Meadow. The population there had to have exceeded 500 and I wish we had kept an accurate count day to day of how many plants we removed but pulling thistle in the middle of July in Southern California is no joke, and we were lucky to remember our names at the end of the day let alone an accurate count. Regardless the district botanists Lance seemed to be pleased with our final result. The battle of the bull thistle ended with victory siding with California natives in Johnson’s Meadow primarily due to the intervention of people who care about conserving and protecting the diversity of our public lands! It was inspiring to look out and see how much we were able to make an impact, yet simultaneously it was daunting considering how many meadows just like this one exist that cannot be managed through human intervention. The battle of the bull thistle may have ended for this growing season in Johnson’s meadow, but something tells me the race for dominance between native and non-native species is just heating up.

Images of Johnson’s Meadow before (top) and after (bottom) removal of invasive bull thistle (C. vulgare).

New friends and Newts!

This month has been full of new plants, insects, and adventures! Seed collection has started to pick up in early July, so we began trying to scout as many populations as possible before they started to disperse. Dean and I found a gorgeous site for one of our target species, Penstemon newberryi, as well as a neat wetland with native pond lilies. I had to go take a look at the blooms!

We began exploring further away from the office and came across Pyramid Creek Trailhead, which happened to have a significant amount of our target species there, as well as gorgeous views of Horsetail Falls and the Desolation Wilderness. We have spent a few days going back there for phenology checks as well as seed collections! So far, we have collected Penstemon newberryi, Chlorogalum pomeridianum, Hosackia oblongifolia, and more to come soon!

My family came and visited me to see my new home! we explored the area and went to Lake Tahoe. They were so excited to see California again after moving to Idaho! We also went to see the Rubicon Trail, which is an off-roading trail that is some serious business. I don’t think my little Jeep is up to the task!

Dean and I have had the amazing privilege of assisting the Pollinator Team from Cal State East Bay. We collected data for a pollinator network for Lewisia kellogii and Calochortus clavatus var. avius. Learning more about pollinator work is fascinating, and I’m feel so lucky that we made some amazing new friends!

Yosemite!! I have been waiting for this for a while, and I finally got to go with Iris and Matt! We explored the park for a weekend, and it was absolutely fantastic. This park is very special and definitely worth the visit! We were there during a stormy weekend which was fantastic to see so much water and lightning!

Then, it finally happened. Dean and I drove to the north zone of the forest in search of some target species and stopped by a creek to eat lunch. There it was, sitting on a rock in the shallows… a NEWT! I have never seen a newt before, and it was magical. Best day yet!

On my free time, I went to Grass Lake with Matt, which is California’s largest fen. I have never been in a fen before, which the feeling is like a waterbed. Matt and I explored, finding some neat, rare Carex species, some little friends, and a rare mushroom that Dean collected for sequencing!

Dean and I went to go check on an Anderson’s Thistle site to see if seeds were ready to be collected, and Dean spotted something amazing! There was a large bright yellow bumble bee, that turned out to be Morrisons Bumble Bee which is a threatened species. So wonderful to see two of them in one day!

Finally, to end this month, we assisted in a training for Botrychium surveying. Seeing these in real life was pretty insane, they are smaller than I imagined! I am excited to now know what habitats they like to go look for them on my free time! We then finished off the day by watching a baby Saw-whet owl up in a tree.

And a little bug appreciation section!

July was amazing, I’m looking forward to what comes next!

Bees, berries, bears.

A favorite lunch spot of mine at one of our seed collection sites.

3 observations from this past month:

A thin layer of moss sits at the sill of the botany truck window. If you roll it down, you can run your finger over the soft mat of vegetation, sometimes still wet from rain.

Fallen trees contribute to the soft hills of the mossy understory. If one has been there long enough, placing your weight on its decaying wood will leave you finding yourself falling through to the other side, where water in some form awaits.

With the right timing and luck, you might witness black bears eating grass. Or berries and deer. Or rotten salmon.

Whether they know it or not, town is a safe haven for these young bucks, especially now that we have entered hunting season.

It is strange to think that I will only be in South East Alaska for one season, one summer. Especially when echoes of the year-round adaptations which have formed this rainforest are everywhere, so long as you take a second to look close enough.

Summer is go-time for everyone and everything here. Animals, plants, and Forest Service employees alike are all desperately trying to succeed in a frenzy of organized chaos, accomplishing tasks they’ve been waiting to do all winter long. Fishing, hunting, and foraging abound. Fawn learn how to walk on shaky legs. Plants expend energy producing colors and smells to tell the right pollinator where to land, and what animal it would like to poop out its seed. Fungi must spit out their mushrooms before it’s too late.

A common goal sweeps through the area and permeates the air like fog. It challenges us. Achieve, and prepare. Because, as the Starks would say with furrowed brows and foreboding seriousness—winter is coming.

It would be a mistake though, to interpret this goal as a reason to not appreciate the land, especially at the height of its liveliness, for all of its beauty and quirks. How else might we learn from it? For example. Large, fleshy fruits are not found in the plant diversity here. The Tongass National Forest Botanist (and my supervisor), Val, points out that this is likely the result of a short growing season, too little heat, and too much rain. All of which make such an endeavor not worth it to many plants. Why attempt to make a fruit that may not have enough time to fully mature? Or even worse, to put all your carefully stored carbohydrates into making one that could rot before it ever gets eaten?

Consequentially, I have picked more berries in the past month than I have my entire life. As of now, the list stands at: blueberries (three kinds), salmonberries, five-leafed bramble (a tiny kind of raspberry), (red) huckleberries, thimbleberries, (stink) currants, and (red) elderberries. Each one of these fruits measures smaller than my big toe—but (with a bit of plant anthropomorphizing,) this trend towards the tiny-and-mighty makes complete plant sense.

In this part of town, plants with fleshy, edible fruits know that any large animal able to carry your seeds to greener pastures will be on hiatus once the warm-ish weather leaves. So you’ll need to put out fruit, fast. Or at least as fast as you can, for a plant. Hence, small fruit. And a lot of them, to not only make it worth the bear’s while but to present perhaps a bird or mouse with the opportunity to take some of your seeds as well. Maximize your odds. Put lots of seeds in those fruits while you’re at it. Small fruits mature faster, and require less energy per unit. So even if one or two of them develops mold, it’ll hurt less. The risk of missing your opportunity to continue your genetic line is minimized. Plus, the ants will happily carry those leftover berries away, anyhow.

It is, figuratively and literally, the small things like this which allow me to endlessly marvel at the workings of ecology. Alaska is a prime example of how abiotic factors influence the dynamic of living organisms. How it has forced them for thousands of years to figure out a way to work in tandem with one another through stresses, all towards the basic endeavor of survival. Ecology reminds us that nothing which persists in nature does so in isolation. Especially not here.

This same reason is why Levi (my field partner) and I work to collect a diversity of seed. Because no one truly understands, at least not yet, how exactly that web of organismal relationships operates, or how intricate it might reveal itself to be if it is teased apart. And we risk losing it all, forever, if we continue to ignore that fact. From the berries, to the sedges, to even the stubborn seed pods of western meadows rue that refuse to ripen; there is merit in appreciating seeds of the entire native community, even if limitations force us to prioritize a subset. Who knows where we would be without them?

See you next month,

-Emma

July is no joke

July went by in a flash. Time flies when your brain is preoccupied with worries about nearby wildfires. The month greeted us with a week of 105 degree days, making fourth of July plans slip away and canceling our pre-scheduled scouting trip to the Feather River District, due to a rapidly spreading fire that sprang up near Oroville, where the temperatures reached 114 degrees. 

Along with the heat arrived the sudden surge of work we had to do as seeds were quickly reaching maturation. We abruptly picked up the pace and had no choice but to begin collections in addition to being vigilant with scouting and mapping and correctly identifying pesky lupines before they all go to seed (Sam and I basically memorized the entire key to the Lupinus genus from how much we had to repeat the process). Inevitably we were going to miss the collection window for a few of our populations, but we tried our best to set our priorities based on each species’ phenology. 

Big-Leaf Lupine (Lupinus polyphyllus)

One of our top priorities was Beargrass (Xerophyllum tenax). Despite its deceiving name and appearance, Beargrass is not in fact a grass, but a perennial herb in the monocot Melanthiaceae family, which more closely resembles lilies. Beargrass is one of the most culturally significant plants on our list, as indigenous groups in the area have been utilizing parts of the plant for weaving and food for many years. In addition to cultural significance, Beargrass was at the top of our list for being incredibly well adapted to frequent burning, due to its hardy underground rhizomes. A rhizome, unlike roots, has nodes along it, allowing the plant to reproduce asexually instead of relying on pollination. This, however, could also be a part of the reason why we often come across a population that has not sent up flowers during the typical bloom period— instead of reliably blooming every year, Beargrass flowering time can be difficult to predict, as conditions need to be just right, and other reproduction methods are available to them. With all this in mind, it’s easy to understand our excitement once we finally came across a substantial flowering population! After plenty of dead-end scouting, Sam and I found one massive population beginning to fruit, and got to collect seed from this important species.

Following the Beargrass collection, there were many days spent making our way down gnarly mountain “roads” in hopes of finding more plants on our list before the seeds disperse. Last week this seemingly casual form of exploration, a routine in which Sam and I had become quite comfortable with, gave us a reminder that we should always be prepared for the adventurous nature of fieldwork. By ‘adventure’, of course, I mean all of the thrilling unexpected obstacles that get thrown at you as you spend more time in remote areas. The wake-up call came in the form of our first time getting our truck stuck in the mud, deep in the forest with no cell service, all while wildfires kept rescuers busy and hours away from helping. We had become too comfortable testing the limits of our truck. We had successfully passed through many sketchy-looking obstacles with it— what was one more tiny creek?

Baby’s first stuck truck

We got home, eventually, after several hours of waiting for help, walking around to try to get phone signal, and staring at the vibrant swirls of smoke in the sky. The Park fire had started a couple of days before near Chico, and was already reaching 100,000 acres around this time. All day we had been watching as the sky morphed into strange colors, with large plumes visible in the distance. The way the setting sun interacted with the smoke produced mesmerizing light distortions, illuminating the landscape in an eerie blue-green light as the sky remained dark orange.

A firefighter was eventually able to come pull us out of the mud, after dealing with yet another small fire that had popped up in the forest. We got out, and slowly made our way back home, driving carefully on winding mountain roads in the dark for an hour and a half. The whole way back we reflected on the incident, and gained a greater sense of respect and caution for the chaos that comes with peak fire season in northern California. Next time, we’ll get out and check how deep the mud is before attempting to drive through…

In search of plants in (and more things to love about) the Lake Tahoe Basin

              A couple of weeks ago, I cried about missing the summer storms in the Northeast. Not to say I don’t appreciate the constant 75-degree sunny days, but sometimes I long for the kind of rain that pounds on the windows, and thunder that shakes the house. The next day at work, it started to thunder for the first time since I’ve been here and stopped right after we took out lunch break. That day really cemented the importance of manifestation in the workplace for me.

              Lack of torrential downpours aside, the field season has been going great! The botany crew here at LTBMU has been finishing up our invasive plant removal for the season (aside from when bull thistle rears its ugly head…) and moving towards surveys. In our survey plots, we identify and record every plant species we find. Initially, this was really overwhelming, but it’s been a great way to learn more plant IDs. Our surveys have been concentrated in the burn scars from the Caldor fire in 2021 and are one way to document how the forest is regenerating from this high intensity fire. Although invasive plants have been popping up in patches here and there, the forest seems to be regenerating well, with many native species, like fireweed (Chamerion angustifolium) and quaking aspen (Populus tremuloides) gaining a foothold. In addition to documenting regeneration, surveying has helped Gerardo and I find many seed-source populations of target species, like spreading dogbane (Apocynum androsaemifolium) and Anderson’s thistle (Cirsium andersonii). We have also surveyed for several rare and sensitive species, like the veiny water lichen (Peltigera gowardii) and Bolander’s candle moss (Bruchia bolanderi). These surveys involved a lot of crouching in streams and laying down in bogs, but it was worth it to map these cute little plants.

Bull thistle (Cirsium vulgare) has started to flower……..*shudder*
My coworker Emma and I getting down in the mud in search of Bruchia bolanderi
Bruchia bolanderi

              Last week, we took a break from surveys and seed scouting to work on an exciting collaboration with the Washoe tribe. On a stretch of beach on Skunk Harbor, one of Lake Tahoe’s most scenic shorelines, we constructed an enclosure for Tahoe yellow cress (Rorippa subumbellata). Then, within the enclosure (and surrounding area), we planted 300 small plugs of Tahoe yellow cress grown by the Washoe tribe. Hopefully, these little seedlings will go on to produce a thriving population. Tahoe yellow cress is an endangered species endemic to Tahoe, meaning it grows on the beaches of Lake Tahoe and nowhere else in the world. This little member of the mustard family is primarily threatened by recreation (trampling), so ideally our enclosure will allow the yellow cress to reestablish in Skunk Harbor. After finishing up the planting, we squeezed a quick swim into our lunch break.

Skunk harbor enclosure
Tahoe yellow cress (Rorippa subumbellata) seedlings

              After a few weeks of surveys, scouting, and planting, I definitely feel more settled in. While I miss lush, stormy summers with firefly lit evenings scored by katydids, I’m finding new things to love about summer here in the basin: the sweet, caramel-like smell of Jeffery pine bark (Pinus jefferyi), beaches with perfect turquoise water, freezing alpine lakes surrounded with wildflowers, and the little groves of aspens that remind me of the trees back home.