The Iceplant Invasion: Post for the Earth-Friendly Chroniclers’ #9

Ice Plant flowerIceplants (Carpobrotus edulis) are also called “sea fig” or “hottentot fig” and the second plant I’m learning about, and featuring for the Earth-Friendly Chroniclers’ Challenge #9.

The focus for challenge #9 is biodiversity and invasive plant species…and what Jane, the host of the Earth-Friendly Chroniclers’ call the plant “bullies”.

As with the yellow starthistle (my 1st post for this challenge) which grew all over Contra Costa County, the iceplant is another plant I mistakenly thought as native to this part of the central coast of California.

Ice Plant by Fort Ord Dunes 1

Photo taken just a few weeks ago at Fort Ord Dunes National Monument area. Don’t let the pretty pink flowers fool you, these plants are very aggressive, and crowds out native sand dune plants.

Why did I think it was native?  Well, because these plants are plentiful all along the coast, especially around the Fort Ord Dunes area (photo above).

Articles about the beautiful coastal Monterey County town of Pacific Grove feature images of iceplants in full bloom —- including on the official city website.  The Perkins Park area of Pacific Grove is noted for its “magic carpet” of iceplants.

City of Pacifc Grove Website

Main page of the Pacific Grove official website. The mass of pink flowers are all iceplants.

Among the first scenic coastal photos we took when we moved here, featured ice plants in the background.

The photo below is my grandson, Jun-Jun, at a popular beach side / highway stop near Seaside, California.  He is surrounded by…you guessed it, ICEPLANTS.

Jun surrounded by iceplants

And at a paved road area at the Fort Ord Dunes (part of the Monterey Bay Coastal Bike Path) here is Jun riding his bike with his grandfather, where you can see iceplants growing on both sides of the road.  To the left of the photo is traffic from California State Highway 1.

Jun and Jeff riding bikes at Fort Ord Dunes

The photo below of my younger grandson, Gabriel, zooming away (actually, slowly foot pedaling away) on his toy cycle shows more of the red-hued leaves of the iceplant in the background, facing the Pacific Ocean.  Yes, way more iceplants.Gabriel at Fort Ord Dunes area

Iceplants are found on many beaches here in the Monterey Bay.  The greenery you see on the sand dunes below at Fort Ord Dunes are indeed…more ice plants!

Fort Ord Dunes beach and iceplants

Iceplants are so common in this area that it is easy to assume that they have always been here.

Non-native plants have been brought to California since the first contact with Europeans.  A little about the big problem of the loss of grasslands, and native coastal plants from ElkhornSlough.org:

Approximately 99% of California native grasslands have been lost over the last 200 years, making them one of the most critically endangered ecosystems in the U.S.

Loss of coastal scrub in some parts of California has also been severe. Within the Elkhorn Slough watershed, coastal scrub assemblages often face threats from infestation by tall exotic weeds, such as poison hemlock, fennel, and jubata grass.

Because most of California has a mild Mediterranean climate, it is easy to see how plants from other parts of the world, especially with similar weather, can naturalize here.

Iceplants creep across Moss Landing State Beach

Iceplants growing across the Moss Landing State Beach area, farm fields across the river water.

Typically, these plant invaders have no natural enemies, or wildlife that eat the plants, so it is easy for them to become plant bullies.

Photos above of iceplants spilling past fence areas at the Moss Landing State Beach pathway.

Apparently, iceplants are really good at crowding out native plants…the photo below is a good example:Ice plant circling the native plant

The plant in the middle of the photo is a beach Sagewort (Artemisia pycnocephala), which is the most common California native plant found around sand dunes.  You can see that this one is being encircled by the aggressive iceplant, which will eventually choke out the sagewort.  Iceplants are very good at spreading!

While iceplants in their native South Africa are great for the wildlife there (where turtles, snakes, antelopes, lizards and other animals eat the plant’s leaves, flowers and seeds) it does not provide food or shelter to native California coastal wildlife.

Ice Plant Bagaud French Mediterrennean

Photo of iceplant covering landscape on the French Mediterranean island, Bagaud island, in the Port-Cros National Park. Photo by Vincent via Wikipedia and public domain

In parts of the Mediterranean coast where the iceplant naturalized, the plant also helps other invasive species to thrive.  I found this part about invasive mutualism of interest from a Wikipedia article:

On the Mediterranean coast, Carpobrotus has spread out rapidly and now parts of the coastline are completely covered by this invasive species. Moreover, another invasive species, the black rat, has been shown to enhance the spreading of the ice plant through its feces. As the ice plant represents a food resource for the rat, both benefit from each other (invasive mutualism).

Invasive Plants in the Western United States

Here is more about invasive plants from the U.S. Department of the Interior, Bureau of Land Management (BLM) in California:

Estimates indicate that invasive plants are spreading at about 4,600 acres per day on federal lands alone in the Western United States.

Weeds have invaded approximately 17 million acres of public rangelands in the West – more than quadrupling their range from 1985-1995. In northern California, yellow starthistle increased from 1 million acres in 1981 to 10 million acres today.

While the yellow starthistle were introduced by accident, the iceplants were planted in this area on purpose.

Ice plants at Moss Landing Harbor

Ice plants at Moss Landing Harbor (in the water are two Southern Sea Otters)  Click on the photo if you would like to see more photos and learn about sea otters that live in the Monterey Bay area.

Concerns about soil erosion, and the belief decades ago that iceplants would help to stabilize soil and sand dune areas led to mass plantings, especially in military bases, like at Fort Ord.

In the 1970s, drought issues and the need to use drought tolerant vegetation along California highways led CalTrans — the California Department of Transportation, who manage over 50,000 miles (80,467 km) of the state’s highways and freeways — to plant iceplants on some freeway embankments and dividers.

Except…the folks who promoted the use of iceplants to stabilize soil did not have the information we now have, or the awareness about biodiversity issues, and the extent (and ability) of these plants to crowd out native plants.

On the use of iceplants as a soil stabilizer, from a Wikipedia article:

Despite its use as a soil stabilizer, it actually exacerbates and speeds up coastal erosion. It holds great masses of water in its leaves, and its roots are very shallow. In the rainy season, the added weight on unstable sandstone slopes and dunes increases the chances of slope collapse and landslides.

Oh no! So now what?

A lot of work will need to be done to remove iceplant infestations, and to re-plant native plants and restore dune habitat areas with California coastal plants.

The photo below from Moss Landing State Beach, where dune restoration projects are in place, gives an idea of what the sand dunes around these parts are supposed to look like…

Dune Restoration

Removing iceplants will give native plants a chance to recover, like the yellow sand verbenas (Abronia-latifolia)…

Abronia latifolia yellow sand verbena

and the Monterey spineflower (Chorizanthe pungens).

Monterey spineflower Chorizanthe pungens via Wikipedia commons

So that eventually, the dunes here will look more like the photos below, instead of iceplant intensive, like what we are used to seeing…

Monterey Bay Sand Dune Plants

Coastal cities and public agencies, as well as non-profit organizations are putting forth dune restoration projects, working sections at a time to remove highly invasive species like iceplants.

Native plants returning to dunes

There are still many iceplant patches in this area that need to be removed, but native plants are returning to dunes at the Moss Landing State Beach area.

This will take funding, a lot of work, a lot of volunteers, and educating the public about the “return of the natives”.

Native Plants Dune Vegetation

Because ice plants are succulents and have a high water content, burning is not a recommended way to eradicate these plant bullies.  They will have to be removed by pulling the plant out (thankfully, it has shallow roots), flipping them over and piling them up to compost in areas where it makes sense to compost them.  I’ve also read about cities and agencies allowing the use of a specific type of herbicide to kill the plants, under expert supervision (see the Pacific Grove city website and type in “ice plant” in the search box for more details).

I hope by posting this information and photos, you learned more about this invasive plant (as I have), and it is another step towards helping to control the spread of this plant bully in the Monterey Bay area.

To join in the Earth-Friendly Chroniclers’ Invasive Plant Challenge, click here, and be sure to visit blog posts for this event, including from South Africa / Cape Peninsula – by Nature on the Edge, from Australia – An Evolving Scientist and in Oregon, by challenge host Just Another Nature Enthusiast.

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Talk about iceplants just being part of the landscape here…we got this magazine yesterday, and I see the red hues on the iceplants make a very nice addition to the front page cover photo.  

Ice plants on cover of VIA magazine

Screen shot of digital version of Via Magazine’s Summer 2015 issue.  The spot is listed inside the magazine as from Marin County, California (in the North Bay, across the Golden Gate Bridge)

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ABOUT FORT ORD – DESIGNATED A NATIONAL MONUMENT IN 2012

If you visit the Monterey Bay area and want to go to a super clean beach without many visitors, check out the Fort Ord Dunes State Park.

In April, 2012, a large part of the Fort Ord area became a National Monument, and is federally protected from further development — a good thing for the Monterey Bay!

Before becoming a U.S. National Monument, Fort Ord land was used by the U.S. Military as a training area.  Starting in 1917 and up to the 1990’s, almost 1,500,000 troops trained at Fort Ord. In addition to its role as a major training base for the army, it was also a staging and deployment area for army troops that fought in World War II as well as the Vietnam war.

Ft Ord Barracks

Fort Ord Barracks — awaiting demolition. Despite the military base closed for over 20 years now, ice plants survive — as you can see on this photograph — and are seen all over the Fort Ord land.

The base officially closed in 1994, and many of the military structures (mostly barracks) have been demolished, and the land now houses facilities used by California State University Monterey Bay (CSUMB), and other tracts of land are being developed for housing and commercial uses.

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More information:

Return of the Natives – A California State Universtiy Monterey Bay (CSUMB) community and school-based environmental education program to restore native habitat – On why they are doing this work:

The Monterey area’s natural landscape and ecosystems are under siege from an army of invasive “exotic” plant species or WEEDS.

Most have been introduced for horticultural purposes, or came as agricultural stowaways, from areas of the world that have similar climates to central California. Spreading onto disturbed soils such as road cuts, and lacking natural enemies, these non-native invaders quickly replace native plants and overrun fragile ecosystems.

Monterey Bay National Marine Sanctuary page about Coastal Dune Community

The Importance of Native Species – Information and resource links from the Elkhorn Slough Foundation / National Estuarine Research Reserve

Coastal Training Program from Elkhorn Slough – Endangered Species Fact Sheet

About iceplants(Carpobrotus edulis) – Wikipedia article

President Barack Obama Proclamation – Establishment of the Fort Ord National Monument

12 thoughts on “The Iceplant Invasion: Post for the Earth-Friendly Chroniclers’ #9

  1. Pingback: Yellow Starthistle: Invasive plants and the Earth-Friendly Chroniclers’ Challenge | Lola Jane's World

  2. That’s amazing, Lola Jane. From your top two pictures I thought I was seeing what I know as pig face, or mesembryanthemum. Sure enough, same family as your ice plant (carprobotus). They make a stunning display in flower. Sure enough, I find that they are a pest in some parts of this country, but have been used to control erosion and even as ‘bush ticker’ because of their drought resistance. So, again, one man’s plant is another man’s weed 😉

    • How interesting! I don’t think I’ve seen the type — the mesembryanthemum — here. You are right, in the same family, same flower structure, but the leaves are what is so different. Both types are salt tolerant (which is part of why they were used here for coastal planting).

      It would be great if we can find some other uses for the iceplants that grow here, but unfortunately, even for food purpose, we don’t have the right type of wildlife on the coast…all the more reason why they are now out of control.

    • I’m glad you added that, now I know what “bush tucker” means, that’s great 🙂 Is it the fruit / seeds that are eaten, or the leaves? The “bladder cells” are amazing for the water reserve, so I can imagine how happy one would be out in the bush, to find these plants. Definitely fits the saying…one man’s weed, a plant for the other.

      • There is no easy answer to your question. The indigenous people are very skilled at knowing when to eat the flowers, seeds, leaves and roots. I wouldn’t attempt it without a good guide

  3. Lola Jane-
    Once again, the research and photos create a powerful, easy to understand, and inspiring piece of writing.

    HOW can we get this kind of (native) grass-roots writing out to inspire folks to not only understand this issue… but to get involved? From the looks of those photos – there is a lot of work to be done. Both PR and manual labor.

    ~Jane

    • I think most people do not know how invasive these plants are, and ongoing PR / education — and yes, a lot of manual labor — are key to eradicating these plants from the coastal dune areas.

      I was surprised to learn from your other comment for this post that this plant is sold in Oregon, and in Arizona! Though they don’t seem to do well in higher elevations here (thankfully) the possibility of spread in coastal Oregon (and yes, maybe in the Arizona deserts) may be there, and after what I have learned, it seems irresponsible to sell these plants. I hope it is a less invasive variety…or that garden centers / government agencies / BLM / invasive plant experts are communicating!

      The military is good at implementing orders, so I can imagine when Ft. Ord was told to plant these, it quickly it covered the area, evidenced by the fact that these plants survive and continue to spread 20 years after the base closure.

      Thanks for another great subject for the challenge, Jane!

  4. Yes, that’s the ice plant that my parents had that carpeted their backyard. They had it all pulled out at some point. I finished a run the other day near Lover’s Point and was having a snack when I noticed a squirrel munching away on ice plant. And then I saw my issue of VIA. You do realize that now, whenever I see ice plant, I will think of you.

    Another great series of photos and information that helps me be more smarter. More smart. Smart.

  5. Pingback: Broken down barracks of Fort Ord in the Monterey Bay | Lola Jane's World

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