The yellow star-thistle is a serious emerging invasive species with spiny, yellow flowers and leaves extending down the stem that give a winged appearance. Typically found in degraded grasslands, rangelands and near roadways, the species has been linked to portions of land that were historically used for grazing.
With plants growing up to six feet tall, the yellow star-thistle propagates rapidly and reproduces prolifically. One large plant can produce tens of thousands of seeds annually, causing issues like crowding out native plant species, decreasing biodiversity, and creating a less resilient natural community that can lead to more vulnerable habitats, which can be threatened by wildfire and climate change. Yellow star-thistle plants have deep taproots that can significantly deplete soil moisture reserves, taking vital resources from native plant species.
With plants growing up to six feet tall, the yellow star-thistle propagates rapidly and reproduces prolifically. One large plant can produce tens of thousands of seeds annually, causing issues like crowding out native plant species, decreasing biodiversity, and creating a less resilient natural community that can lead to more vulnerable habitats, which can be threatened by wildfire and climate change. Yellow star-thistle plants have deep taproots that can significantly deplete soil moisture reserves, taking vital resources from native plant species.
Irvine Ranch Conservancy and its partners, OC Parks, City of Irvine and the City of Newport Beach, work diligently to help prevent the spread of invasive species on the Landmarks. Volunteers interested in helping with upcoming restoration projects can sign-up for stewardship activities on LetsGoOutside.org.
For more information about the Irvine Ranch Natural Landmarks, visit IRConservancy.org or follow the Landmarks on Facebook, Instagram and Twitter.
For more information about the Irvine Ranch Natural Landmarks, visit IRConservancy.org or follow the Landmarks on Facebook, Instagram and Twitter.
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