Our City Forest Joins the iNaturalist Community

Comment

Our City Forest Joins the iNaturalist Community

At dawn, mist settles low across our arboretum at Martial Cottle Park. Everything is washed in tones of pink and blue as the sun rises to the chorus of the birds. The crepuscular coyote tracks down the gophers and squirrels whose tunnels network through soil where the beetle grubs sleep in tight curls.

Anyone that has spent an extended period of time at our Community Nursery or Urban Forestry Education Center (UFEC) knows that a variety of wildlife can be found living in our gardens and trees. As we expand our gardens and as they mature into their larger forms, we hope to see a growth in biodiversity as well. Biodiversity, or biological diversity, is the variety of life forms in a specific area. The size of this area where biodiversity can be measured varies widely and depends on the needs of the person who is doing the measuring. You can measure the biodiversity found in 1 square foot of soil or an entire ecosystem. In our case, we are trying to measure the biodiversity at our Community Nursery and Urban Forestry Education Center, both of which are approximately 2 acres. And we need your help to document this information through iNaturalist! 

What is iNaturalist?

iNaturalist is a nonprofit social network and database that connects community scientists, naturalists, and other scientists from around the world to document observations of the biological world. These observations are documented through pictures, audio recordings, and data such as an organism’s sex, life stage, your own written notes and details, and much more. The app and website have a multitude of features such as AI assistance in species identification, creating projects for a variety of purposes, and keeping project journals to keep in touch with a project’s community.

iNaturalist has led to the discovery of new species and unprecedented amounts of biodiversity have been discovered in urban environments, such as three researchers who documented over 1,000 species in their home and backyard. Like these researchers, scientists around the world use many observations of the observations uploaded to iNaturalist for their own research and even use iNaturalist as the platform for their projects. This not only allows community members of all backgrounds to participate in the scientific process but also connects people to their environment and to each other. 


While iNaturalist can be used for a wide variety of projects, there are a few things that iNaturalist is not intended for, such as:

  • Documenting domestic animals and cultivated plants. There may be some specific exceptions to this rule but these exceptions must have a specific purpose to upload observations of domestics and cultivars. An example would be that you are creating a project intended to document and study interactions between domestic animals or cultivated plants and wildlife.

  • Observations of humans. iNaturalist is not intended for uploading pictures of people.

  • Abiotic observations. iNaturalist is made for documenting and observing living organisms (biotic), not the abiotic sphere which includes things such as rocks and minerals. Abiotic observations can be noted and pictured when it is relevant to the context of the organism that is being focused on. For example, if you are documenting a California Poppy and you observe that it is growing in serpentine soil, that is very important key information that tells us a lot about that plant and its natural history.

Image sourced from U.S Forest Service


Our City Forest’s Projects

As of March 2024, our two new projects already have 122 documented species between our Community Nursery and Education Center, including:

  • Coyotes (Canis latrans)

  • California Ground Squirrels (Otospermophilus beecheyi)

  • Fence lizards (Sceloporus undulatus)

  • Pacific Gopher snakes (Pituophis catenifer catenifer)

  • Anna’s hummingbird (Calypte anna)

  • Great Blue Heron (Ardea Herodias)

  • Great Egret (Ardea Alba)

  • Paradise Jumping spiders (Habronattus sp.)

  • Wolf spiders (family Lycosidae)

  • Bird’s Nest Fungi (family Nidulariaceae)

Great Blue Heron (Ardea Herodias). Image sourced from Great Ecology.

Common Bird’s Nest Fungus (Crucibulum laeve). © randomtruth, some rights reserved (CC BY-NC-SA)

What is a BioBlitz?

A BioBlitz is a community effort to document and identify species diversity in a specific location and sometimes within a certain time period such as a single event that takes place over a few hours. These events are held around the world by community leaders, non-profits, and other institutions.

A BioBlitz hosted by Keep Coyote Creek Beautiful. Image sourced from Open Space Authority.

Currently, we have two BioBlitz projects, one at our Community Nursery and the other at our Urban Forestry Education Center. These projects are location bound, but not time bound meaning that any observation recorded within our plots at any point in time will automatically be added to our projects page. In the future, we may host BioBlitz events to more intensively document the biodiversity at our plots but for the moment anyone can visit either our Nursery and Education Center during open hours and make observations.


BioBlitz at Our City Forest's Community Nursery

The goal of this project is to document the wildlife that comes to our various gardens, specifically pollinators and birds. While a large amount of the trees and shrubs that are at our nursery get sold and taken to a new home, our nursery also has a collection of permanent gardens that feature primarily California native plants as well as some non-native drought tolerant species we hope will attract more wild pollinators and not just our own bees from our hives.


BioBlitz at Our City Forest's Urban Forestry Education Center

The long-term vision for our Education Center is to create more demonstration and education-based gardens such as a native pocket forest and plant an understory in our arboretum. Our arboretum features many species of trees, both native and non-native, and in 20 years when they have all matured the arboretum will be mostly shaded. At the moment, the spaces in between the trees are taken over every year by fast growing invasive grasses that reproduce before we have the chance to remove them. Our goal is to plant more native shrubs, grasses, perennials, and annuals that can outcompete these invasive weeds and provide a wealth of diversity that will attract wildlife such as pollinators, songbirds, raptors, and reptiles as well as non-animal species such as lichens and fungi! As we move towards this goal and our gardens expand and mature, we want to document the biodiversity and hopefully see an increase in the amount of species we encounter.


How Can I Learn More About iNaturalist?

If you have never used iNaturalist, you can download the app onto your phone. While the app is great for uploading observations on the go, the website is best for navigating projects, discovering new observations, making identifications for other users, reading journals, reading species profiles, and much more!


For more in-depth information, we highly recommend the iNaturalist trainings created by our community partner Keep Coyote Creek Beautiful (KCCB). KCCB hosts regular webinars about iNaturalist as well as Naturalist Trainings for community members and naturalists looking to continue learning about the natural world. They also host monthly BioBlitz events for those who want to get out into nature!


Recorded iNaturalist Trainings:

7/19/23: Naturalist Training - Community Science & Introduction to iNaturalist

8/23/23: A Deeper Dive into iNaturalist webinar

Keep Coyote Creek Beautiful BioBlitz at Alum Rock Park. Image sourced from Open Space Authority.









Comment

Our New Native Bioswale: Urban Restoration in Collaboration With the Watershed Stewards Program

Comment

Our New Native Bioswale: Urban Restoration in Collaboration With the Watershed Stewards Program

Outside of our Urban Forestry Education Center at Martial Cottle Park is a shallow channel that borders our plot. At two points there are drains where run-off and stormwater enter and are directed to the bay. The water that manages to percolate into the soil enters the watershed by way of groundwater. There is a missing piece to this picture.



Impermeable surfaces like the asphalt walking paths next to this channel allow water to quickly run off and enter storm drains, redirecting water that could otherwise be put back into the watershed and restore groundwater levels. However, there are infrastructure solutions that can be easily installed, such as bioswales. For the past few months, we have been planning the installation of a bioswale outside of our Education Center and it will finally become a reality this Spring with help from the California Conservation Corps' Watershed Stewards Program!



What is a bioswale?

A bioswale, also called a bio-retention or biofiltration site, is a vegetated, sloped channel where large amounts of water flow are slowed and directed with purpose. This slowing allows the water to percolate into the soil to be filtered by the vegetation. This filtration removes excess nutrients, such as nitrates and phosphates, which can come from agricultural sources as well as urban fertilizer use. Abundant nutrients may sound like a positive, however excessive levels of nutrients result in a process known as eutrophication. High levels of nutrients result in the uncontrolled growth of plants and microorganisms such as algae. When these plants and microorganisms decay, the amount of bacteria needed to break them down consumes the dissolved oxygen in the water, creating what is often referred to as "dead zones'. These dead zones are stripped of dissolved oxygen which suffocates animals such as fish. Other contaminants such as metals and pesticides are also removed from the water by plants. Green infrastructure like bioswales helps protect and restore watersheds through this process of filtration and percolation.

Example of a California Native bioswale (Image source)

What is a watershed?

A watershed, also known as a drainage basin or catchment, is an area where rainfall and melted snow are channeled into groundwater, creeks, streams, and rivers where they eventually drain into estuaries, bays, and the ocean (NOAA). A watershed connects different ecosystems, including the urban environment, together from the highest mountain tops whose glacial peaks slowly melt down and travel through the landscape to the depths of the ocean. The paths of creeks and rivers are also critical habitat corridors that species such as salmon and terrestrial animals like bobcats and deer need to move their range and complete important points in their life cycle. In Santa Clara County, the Coyote Creek watershed (where our bioswale is located) includes key habitats that connect the Santa Cruz mountains to the Diablo Range. The riparian corridors created by the path of the creek and the habitats that it supports provide safe paths for our wildlife as well as food, water, and shelter.

Watersheds of Santa Clara County. (image source)

The Watershed Stewards Program

As previously mentioned, our Bioswale project is a joint effort between Our City Forest and the Watershed Stewards Program (WSP) with plant donations made by local nurseries such as Grassroots Ecology. WSP is a program run by the California Conservation Corps (CCC) in partnership with Americorps. As stated by the CCC, WSP “is dedicated to improving watershed health by actively engaging in restoration science, civic service, and community education while empowering the next generation of environmental stewards". WSP corps members complete 11-month terms at placement sites such as government agencies, local organizations, and nonprofits to improve watershed health through a variety of methods like water quality monitoring, habitat restoration, and urban restoration projects like our bioswale.

WSP Corpsmembers Kalvin Joe, Katharine Major, and Emily Cox surveying a creek with WSP Mentor Eric Ettlinger. (Image source)

About Our Bioswale

On March 30th and April 6th, we will be installing our bioswale which is composed of over 200 plants across 22 California native species. The selection of these plant species is based on multiple factors. To start, we wanted this bioswale to be composed primarily of grasses and only native species. Unlike the grasses used in traditional lawns, many grasses native to California have vigorous, resilient, and long root systems which make them ideal for stabilizing slopes, preventing erosion, capturing water, and filtering out excess nutrients and pollutants. Many of these grasses are adaptable and can handle California's characteristic climate patterns of drought and flooding. Other factors in the species selection process included what species are resilient enough for the climate and soil at Martial Cottle Park, plants that support pollinators, aesthetics, and the availability of plants at our nursery as well as from the nurseries that have been so generous in their donations. Here is the complete list of species in our design:

  • Common Yarrow (Achillea millefolium)

  • Saltmarsh baccharis (Baccharis glutinosa)

  • Valley Sedge (Carex barbarae)

  • Foothill sedge (Carex tumulicola)

  • Soap Plant (Chlorogalum pomeridianum)

  • Sacred Datura (Datura writii)

  • Wild Rye Canyon Prince (Elymus condensatus ‘Canyon Prince’)

  • Creeping Wild Rye (Elymus triticoides)

  • Western Goldenrod (Euthamia occidentalis)

  • California Fescue (Festuca californica)

  • Creeping Red Fescue (Festuca rubra 'Pt. Molate')

  • Great Valley gumweed (Grindelia camporum)

  • Oregon gumweed (Grindelia stricta)

  • Common Rush (Juncus patens)

  • Deer Grass (Muhlenbergia rigens)

  • Marsh fleabane (Pluchea odorata)

  • Blue-eyed grass (Sisyrinchium bellum)

  • Yellow Eyed Grass (Sisyrinchium californicum)

  • Alkali Sacaton (Sporobolus airoides)

  • Purple needlegrass (Stipa pulchra)

  • California Aster (Symphyotrichum chilense)

  • California Grape (Vitis californica)



If you are interested in helping us plant our Native Bioswale, sign up for the first workday on March 30th and/or the second workday on April 6th. If you cannot make these dates don’t worry! Our new bioswale will have plenty of weeding, watering, and educational workdays in the coming future and possibly even an extension along our southern gate! 

Common Yarrow (Achillea millefolium). (Image source)

Deer Grass (Muhlenbergia rigens). (Image source)

Wild Rye Canyon Prince (Elymus condensatus ‘Canyon Prince’). (Image source)

Western Goldenrod (Euthamia occidentalis). (Image source)

Sacred Datura (Datura writii). (Image source)









Comment

Plant Communities of Santa Clara County

Comment

Plant Communities of Santa Clara County

What is a plant community?

In Ecology, a community is one of the various levels of ecological organization. These levels of ecological systems are used “to better understand the frame of reference in which they are being studied” (MSU). In other words, it helps ecologists define the scope of their studies and observations. These levels start at an individual of a species then climbs upward to species population, community, ecosystem, and biosphere. The community level is composed of multiple species that share a common environment. An ecosystem, on the other hand, includes both living organisms and nonliving features such as minerals and water. A plant community refers more specifically to plant species that grow in shared environments and in relation to each other. However, plant communities, and ecological communities more broadly, are not discrete zones that have definite and defined boundaries. Plants found in one community can be found in others and communities transition into others. Chaparral spills into oak woodlands and oak woodlands blend into redwood forests.

Serpentine Chaparral overlooking San Francisco (Image source)

The California Floristic Province and Mediterranean Climates

Santa Clara County is part of the California Floristic Province, a biodiversity hotspot that ranges from Baja California up to Southern Oregon, including the coastal islands along that range including the Channel Islands. 

This region of biodiversity is defined by a Mediterranean Climate. This type of climate is considered to be globally rare and found only in 5 regions in the world: California, Central Chile, the Western Cape region of South Africa, South West and Southern Australia, and the Mediterranean basin (which includes North Africa, parts of Europe, Western Asia, and parts of the Middle East). This climate type is characterized by hot, dry summers and wet, cool winters which is reflective of Santa Clara County’s hills, which become a brilliant emerald in winter and golden in the summer. Many non-native, drought-tolerant species of trees and shrubs found in Santa Clara County are native to other Mediterranean climates such as rosemary, lavender, African fern pine, etc. Unfortunately, some of these plants are highly invasive (such as mustard, broom, and eucalyptus) and out-compete native species that our native ecosystems depend on.

Plant Communities of Santa Clara County

Santa Clara County is highly diverse with many microclimates that allow for certain plants to thrive in specific areas. 

CHAPARRAL

Chaparral is dense shrubland characterized by diverse drought-tolerant, woody shrubs. The California Chaparral Institute lists 13 different types of chaparral in California alone and notes of other international chaparral communities from other Mediterranean climates. Among these California types are Serpentine chaparral, Desert chaparral, Ceanothus chaparral, and Island chaparral.

Species found in Santa Clara County

Chaparral Currant (Ribes malvaceum) is a member of the Gooseberry family. This beautiful shrub with pink, tassel-like flowers and round, pink berries is one of our most popular shrubs that Our City Forest plants in our Lawn Busters program. 

Hairy Ceanothus (Ceanothus oliganthus var. oliganthus), commonly called California Lilac, is a wildfire resilient shrub. Its dark leaves contrast beautifully with seasonal blooms of periwinkle flowers. Ceanothus is another popular drought-tolerant shrub that we use in our Lawn Busters program and they come in a large variety of species and cultivars.

 

GRASSLAND

Serpentine Grasslands at Calero County Park (image source)

Grasslands in Santa Clara County include Serpentine Grasslands, Annual Grasslands, and Non-Native Grasslands. Serpentine Grasslands are perhaps the most interesting. This type is defined by serpentine soil, which is high in serpentinite, a stunning banded green rock. It is also California’s State rock! Because of serpentine soil’s unique balance of calcium and magnesium, non-native plants tend to not survive in these soils, leaving room for native plants to flourish.

Species found in Santa Clara County

Purple needlegrass (Stipa pulchra) is California’s State Grass and most widespread native grass. It is perennial and evergreen and attracts many bird species from the large amount of purple seeds that it produces.

Ithuriel’s Spear (Triteleia laxa) is an herbaceous perennial wildflower in the Lily family. The name Ithuriel comes from a character in John Milton’s  epic poem, Paradise Lost, who reveals a toad to be Satan’s by pricking him with a spear (USDA).

 

OAK WOODLAND

Oak woodlands at Coyote Lake - Harvey Bear Ranch County Park (image source)

The eastern hills of Santa Clara County are rolling hills bespeckled with the dark green foliage of oak trees. These hills are generally drier than their western counterpart, the Santa Cruz mountains which tower with misty Coast Redwoods. The Oak Woodland plant community is generally dry, especially in the summer, and intermingles with other communities like grasslands and chaparral. 


Species found in Santa Clara County

Coast Live Oak (Quercus agrifolia) is a keystone species, meaning that it supports the survival of hundreds of other species. This species in particular, according to Calscape, supports a total of 270 species. It is also highly fire resistant and old growth trees can survive being scorched.

Toyon (Heteromeles arbutifolia) gave Hollywood its name. Settlers who came to California thought it to be a type of holly berry! Toyon is another fire resistant species and commonly likes to grow as a companion to Coast Live Oaks. While Toyon is technically a shrub, it can be pruned into a tree. Birds love their red winter berries which are also edible for humans when cooked.

 

RIPARIAN

Coyote Creek is a critical wildlife corridor in Santa Clara County (image source)

Riparian habitat exists in the transition between terrestrial and aquatic environments. This plant community is dense and rich with shrubs, grasses, and trees. These plants must be adapted to tolerate seasonal floods from California’s winter rain storms whereas plants specifically adapted to drier environments can be very intolerant of excess water. Riparian habitats are important wildlife corridors that allow animals such as bobcats, deer, and coyotes to move across the landscape safely. 


Species found in Santa Clara County

Blue Elderberry (Sambucus cerulea / Sambucus mexicana) is a gorgeous shrub that can also be pruned into a tree. Its delicate parasol-shaped clusters of flowers turn into dusty blue berries that a variety of wildlife depend on. Both the flowers and berries are edible and have medicinal uses. However, the berries are toxic to humans unless they are ripe and cooked. There are four types of Elder in California (and more internationally), but only Blue Elderberry grows naturally in Santa Clara County.

California Mugwort (Artemisia douglasiana) is an edible, aromatic, and medicinal herb often found along creek sides. Some California Indigenous tribes, such as the Chumash and Paiute, used mugwort to nurture sacred dreams. If you come across this towering herb, gently rub a leaf between your fingers to release its medicinal aroma.

 

CONIFEROUS FOREST

Mt. Madonna County Park (image source)

Conifer trees are cone-bearing trees such as redwoods, firs, and pines. Santa Clara County is bordered from the South and South-West by the Santa Cruz mountains that maintain their deep forest-green foliage year-round. Many plant species live in the shady Redwood understory including other coniferous species. The Santa Cruz mountains are the primary place in Santa Clara County where Redwoods naturally occur. Throughout San Jose and bordering towns, Redwoods have been planted at lower elevations in an urban setting. However, these Redwoods tend to live stressed lives from that lack of fog that they have evolved to live with.


Species found in Santa Clara County

Coast Redwood (Sequoia sempervirens) is the tallest tree species. The tallest known living tree is a Coast Redwood named Hyperion, standing 379 ft tall. This tree’s exact location is undisclosed but lived approximately in Northern California close to Oregon. Hyperion is estimated to be 600-800 years old, but Coast Redwoods can live up to 2,200 years old.

The Pacific Madrone (Arbutus menziesii) is an evergreen tree that lives in the understory of Coat Redwoods but can also be found in oak woodlands. Like its cousins the manzanitas, the Pacific Madrone has reddish orange bark that peels away as it ages. Its flowers are shaped like clusters of delicate, white bells that flower in the spring.

 

WETLAND

The EPA defines wetlands as “areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season”. This broad definition means that wetlands are incredibly biodiverse! The National Oceanic and Atmospheric Administration (NOAA) divides wetlands into 5 types: marine (ocean), estuarine (estuary), riverine (river), lacustrine (lake), and palustrine (marsh). These categories include both saltwater and freshwater environments, as well as brackish (a mix between freshwater and saltwater found in areas like estuaries where the salinity levels fluctuate). Read more about Wetlands in our World Wetlands Day 2024 blog post!


Species found in Santa Clara County
Tule or Hardstem Bulrush (Schoenoplectus acutus) is a large freshwater grass that grows throughout California wetlands. Indigenous groups across California use tule to make houses, clothing, mats, baskets, and tools.

Saltmarsh Baccharis (Baccharis glutinosa) is a flowering perennial herb that grows in saltwater marshes. This plant grows through rhizomes, a specialized stem that grows underground (not a root!). These rhizomes spread underground where new stems and leaves can pop up away from the original plant.


Comment