I’m a Botanist (and unfortunately I don’t know why your succulent isn’t flowering!)

with Sarah Jacobs PhD of California Academy of Sciences

Wednesday November 9, 2022; 7:30-8:30pm, Terra Linda HS Innovation Hub

Dr. Jacobs is a curator of Botany at the California Academy of Sciences. She helps manage the herbarium (a museum for plants) and also leads a research lab focused on the evolution of plants, specifically the group of wildflowers called ‘the paintbrushes’. In her talk, Dr. Jacobs will describe what it’s like to be a museum scientist and the educational path she took to get there. Along the way, she’ll tell us about the paintbrushes and their biology, as well as highlighting her favorite parts of the type of work that she does.

Dr. Sarah Jacobs of the CA Academy of Sciences

Dr. Sarah Jacobs received her Bachelor of Science at the University of Arkansas at Fayetteville, a Master of Science at Washington State University, and her doctorate at the University of Idaho. As the Howell Chair of Western North American Botany, she is particularly focused on guiding and shaping the collection of Western North American plants, ensuring their preservation, growth, and relevance into the future.

Castilleja - Texas Indian paintbrush
Texas Indian paintbrush

Links:

“Redwoods, Roots, and Fungi” with Claire Willing of Cal’s Dawson Lab

Title: “Redwoods, Roots, and Fungi: Exploring Plant Physiology and Ecology” with Claire Willing of UC Berkeley

with an opening presentation from students from the Marin School of Environmental Leadership (MSEL) on Air Pollution in the Bay Area (7:15 – 7:30 pm)

Date, Time, Location: Wednesday, November 14th, 2018; 7:30 – 8:30 pm at Terra Linda HS in San Rafael, Room 207

Description: The plant microbiome has proven to be an essential and often overlooked aspect of plant physiological ecology. Plant interactions with microbes are thought to have enabled the transition of plants from aquatic to terrestrial systems and the co-evolution of these relationships has been shown to have important consequences for plant performance, nutrient cycling, and potentially even plant species ranges. However, our knowledge of these processes derives from only a few model systems. Claire’s dissertation research explores these relationships in coast redwood forests where, despite their notoriety, plant-microbial relationships remain unexplored. Redwoods are the largest and some of the oldest plants on Earth, yet their geographical ranges are very constrained. As such, redwood forests serve as an excellent system to explore plant-microbial interactions and how they might expand or limit species ranges.

Claire Willing is interested plant-fungal symbioses including with mycorrhizal fungi, a group symbiotic, root-associated fungi. Her work has taken her from throughout the coast redwood range up through the Sierra Nevada mountain range, and most recently, even to Brazil. Her overall interest is in linking fungal community ecology to plant physiological performance, a trend which she hopes to continue to explore throughout her future work.

RSVP on Facebook here.

Links:

Redwoods, Roots, and Fungi Talk Teaser from Marin Science Seminar on Vimeo.

Angiosperms: How the Disappearance of Bees Put Flowers At Risk


By Zack Griggy, San Marin HS

          Plants are unique organisms. They have unique cell structures, ways of making energy, and reproduction. There are many different kinds of plants, but a category of plants called angiosperms makes up 80% of plants. But some of these angiosperms are at risk, as bees and other pollinators, which are vital to angiosperm reproduction, are disappearing.
         Plant reproduction varies among different kinds of plants in two significant ways. The two distinguishing factors that divide the kingdom Plantae are seeding and flowering. Angiosperms are the only group of plants that makes both flowers and seeds.

The various parts of a flower.

         Flowers are the reproductive system of an angiosperm. In a flower, two structures in particular play a vital role in plant reproduction. These parts are the pistil and stamen of a flower. The pistil consists of the ovary, the style and the stigma. The ovary is a small are in the bulb of the flower where eggs are stored. Atop the ovary is the style, a narrow region of the pistil that elevates the stigma. The stigma is the tip of the pistil that catches pollen and directs it down a tube so it can fertilize an ovule. The stamen consists of anthers and filaments. The anther rests atop a filament, which is a long narrow structure that supports the anther, and produces pollen, which can fertilize ovules in the ovary. The plant uses pollination to move pollen from the stamen to the pistil. However, the anther is not capable of pollinating on its own, as the pistil and anther are separated by a small distance. Something needs to pollenate the flower, whether it be wind or a pollinating insect, for the plant to be able to reproduce.
          Bees are unbelievably important pollinators. According to the Michigan State University, bees play a huge role in the environment by maintaining many plant communities. Many of these pant communities are farmed for food. Most fruits and nuts, along with cotton and alfalfa are maintained by bee populations. We need bees for our food and as our population grows, so will our need for bees. 
          Unfortunately, the bee population has been declining over the past 50 years. The decline of the bee population is due to many causes, including pesticides, colony collapse disorder (in which worker bees leave their queen and a few young and nursing bees), predators, and carnivorous plants. These causes are serious threats to the bee population and therefore a serious threat to us.
          Angiosperms are flowering plants that make up 80% of the plant population. They are at risk because bees, their primary source for pollination are disappearing. This can lead to agricultural problems for humans when bees cannot pollinate all of our crops.

Sources:
http://nativeplants.msu.edu/about/pollination
http://www2.epa.gov/pollinator-protection/colony-collapse-disorder
http://time.com/3821467/bees-honeybees-environment/

To learn more about the disappearance of bees, attend Dr. Amber Sciligo’s research presentation on Wednesday, October 21st at Terra Linda High School, 320 Nova Albion Way, in Room 207 from 7:30 to 8:30. 

Carnivorous Plants

by Jane Casto, Terra Linda High School Freshman

Carnivorous plants is a term often associated with flies and Venus fly traps. There is much more however, to learn about these organisms, and about their complex functions that allow optimal survival and ideal food supply. Scientists have been unraveling the true genius of these plants for years, and even now, breakthroughs are being made in research. To begin, we answer the question: what is a carnivorous plant? 
Carnivorous plants, or insectivorous plants, are plants that have adapted to consuming and digesting insects and other animals. These plants work in a variety of ways based on their species, of which there are 600 known to man. The basic understanding of the makeup of carnivorous plants is uniform throughout the different species. Carnivorous plants have adapted to a low-nutrient environment, making digestion of invertebrates optimal, as it is a low-nutrient energy method of consumption.
the Venus fly trap’s deadly leaves, the vibrant trap ready for action

In the example of a Venus fly trap, this ability to digest small insects and organisms is remarkably dependent on the transfer of electrical signaling. According to ScienceLine, “Each trap is actually a modified leaf: a hinged midriB . . which joins two lobes and secretes a sweet sap to attract insects.” This modified leaf is constant throughout all carnivorous plants, while the sap it produces varies in color, sweetness, and other qualities. Following the example of a Venus fly trap, the sap can attract virtually any small creature, and thus, the Venus fly trap often digests small frogs along with the usual fly. When the actual trap of the Venus fly trap is open, the red belly is exposed for all invertebrates to see. Once the prey has been attracted to the trap, the lips of the trap, or the lobes, close within one tenth of a second! So how does a plant move so quickly?
The answer is within the lobes of the Venus fly trap, where three or more small hairs lie. These hairs act as sensors, and if something brushes against two of these hairs, or brushes against one hair twice, the lobes of the plant will snap shut within 30 seconds of initial contact.
small hairs on specialized leaf, or lobe, of the Venus fly trap.
The science behind the closing of the trap is in the pressure caused by something brushing against the hair. This mechanical energy is translated into electrical energy, causing a small electrical signal. This electrical signal is enough to open pores within the center of the lobe, which allow water flow between the cells on the surface of the lobe. Thus water is transferred from the inner layers of the cells to the outer layer of the cells. During the transfer of water, the pressure within the lobes is drastically changed, causing the lobes to invert. This is how the effect of the Venus fly trap is achieved. 
These beautiful and deadly plants have a unique way of maintaining survival, and in turn are incredibly interesting to learn about and study. 
More on carnivorous plants and when
insects fall victim to them
during the October 21st seminar,
7:30 – 8:30 P.M.
Terra Linda High School, Room 207
320 Albion Way, San Rafael, CA 94903

Pollinators, Predator-Prey Relations, and Pursuing Your STEM Interests: an Interview with Biologist and MSS Speaker Amber Sciligo

by Talya Klinger, MSS Intern

Dr. Amber Sciligo, a scientist in the department of Environmental Science, Policy, and Management at UC Berkeley, researches the interactions between insects, plants, the environment, and human economies. Whether she directs her focus to examining self-fertilizing carnivorous plants, observing how native bee communities enhance crop pollination, or finding the optimal level of crop diversity for sustainable farming, Dr. Sciligo’s research has important implications for the wild world of botany. Attend her research presentation at Terra Linda High School, Room 207, from 7:30-8:30 pm on October 21st.

In Dr. Sciligo’s words:

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1.      How did you originally get interested in ecology and evolution?

Multiple life events led me down this path. The first was in my high school biology class, when I was taught how to catch insects and curate them as if they were to be kept in a museum (arrange their body parts and pin them so that they would dry out and be preserved). I LOVED it. I thought I would become an entomology museum curator. By the time I entered college though, I had changed my interests and thought I would save the dolphins (this was back in the 90s) and signed up for the marine biology major at UCSC. Then I took a scuba class in my sophomore year and damaged my ears. I realized my place was probably not underwater, so I changed my major to Ecology and Evolution, a new major that had the same prerequisites as marine biology. That’s when I took another entomology class, curated insects again, and was reminded how much I loved them! So from then on, I took classes that allowed me to specialize in the ecology and evolution of plant-insect interactions. And the rest is history.


2. Why did you decide to research sundew plants?

I kind of fell into the study system. Normally, one picks a study system to ask a research question. In this case I had my question in mind (is there pollinator-prey conflict in carnivorous plants in New Zealand and how do they deal with it?) without more than a vague idea of where I would conduct the work. I knew I wanted to study carnivorous plants and to ask this question. I knew that I wanted to go to graduate school in New Zealand. And when I put the two together, I landed on the system of Drosera (sundews), because it was the only feasible carnivorous plant that New Zealand had to offer. At the time, I didn’t realize that Australia, just a hop, skip and a jump away, had close to 200 species of carnivorous plants of many types, while NZ only had 12 species of two types. But I had chosen NZ, so sundews are what I got!


3. How do carnivorous plants satisfy their needs for insect pollinators and insects as food at the same time?

They do a pretty incredible job attracting different kinds of insects to their traps and to their flowers, usually by visual cues such as colors, or by emitting different smells from the traps and flowers. Often, smaller insects like ants and tiny flies will get trapped as prey, which provides the plants with the nutrients they need. Larger flies and bees will visit the flowers to provide pollination. Sometimes pollinators get trapped as prey. Maybe they were visiting the flowers and the trap was too close and the pollinators fall in or get tangled up. This can be bad for the plant if they need that pollinator to bring pollen from another flower in order to make seeds. But if the plant doesn’t need this, if it can self-fertilize without many inbreeding consequences, then catching a big juicy pollinator would provide a great feed for the plant.


4. What impact will your research on crop diversification and bee communities have on agriculture?

My current work is looking not just at how crop diversity improves native bee communities, (which is an important finding on its own as it demonstrates a way to leave land in production and support biodiversity at the same time), but also how crop diversity and other practices such as crop rotation, cover cropping, mixing annual and perennial crops, and planting flower strips or hedgerows affect multiple ecosystem services at once, e.g. pollination, natural pest control, and soil and air quality. This allows us to see whether farming techniques that improve biodiversity on a farm provides benefits or tradeoffs to ecosystem services (e.g. plants that attract pollinators might also attract pests, but then they might also attract natural predators of those pests). Farmers don’t think about each of these things independently, they see their farms as a whole system with pests and pollinators, and birds and everything else all interacting at once. So it’s important that if we are going to conduct research that results in management recommendations, then we need to study the farm as a whole too. Otherwise we might make conservation recommendations that are unfeasible and won’t be adopted.


5. Whats your advice for high school students who are passionate about ecology and environmental science?

Find what aspects about these fields specifically interest you and dive in! If you have a more broad interest then seek out as many opportunities as you can to expose yourself to multiple aspects of these fields (there are many) and run with those that bring you the most curiosity and excitement. Volunteer to teach younger children or other community members. Teaching is the best way to learn about something. And look for opportunities to work in research labs at universities. There you can learn what parts of the scientific process you like the most. And maybe you’ll find a system that really fascinates you and you can end up studying that for a senior thesis project at a university, or on your own if you prefer.

I would add that while the scientific research world needs enthusiastic students like you, there are many important roles for people who love the natural world: scientific research is one way to go, teaching in schools or public forums is another, or sharing your values through writing, painting, song or other artistic avenues is also a great way to inspire others around you to pay attention.


6. One last question: do you have a favorite carnivorous plant?

Well, to be honest, I’m not really familiar with too many species. In NZ, there are only 12 species and most of them are really, really small and easy to miss. For instance, my study species ranged from only 1/2”-4” in height. I always wanted to find Drosera pygmaea, whose sticky-trap rosette is only 0.25” in diameter!! It’s no wonder I never found them though…they are so small.

I am also fascinated by the bladderworts (Utricularia spp.). They too are very small and were also at my study sites. You can only spot them when they send out a tiny flowering stalk from the body of water in which they reside. The traps are underwater and act like a vacuum to catch tiny swimming insects. I don’t know how they manage to lure the insects into their little bladders, which is why I find them so interesting. They also have very pretty flowers of bright colors, which is not characteristic of the sundews.
To find out more, come to the upcoming MSS presentation at Terra Linda High School, on Wednesday, October 21st, 7:30 to 8:30 p.m. at Terra Linda High School, 320 Nova Albion Way in Room 207. 
Dr. Amber Sciligo’s Marin Science Seminar profile