Invasive species

This 2005 photo provided by Bethany Bradley shows cheatgrass, at right, invading shrubs, left, near Lovelock, Nev. A new study finds that for much of the United States, invasive grass species, such as cheatgrass, are making wildfires more frequent, especially in fire-prone California. (Bethany Bradley/University of Massachusetts via AP)

FILE - In this Aug. 5, 2015 file photo, fire engulfs sagebrush near Roosevelt, Wash. Federal officials have released a plan intended to reduce the size of giant rangeland wildfires that have become an increasing problem in the Great Basin for cattle ranchers, recreationists and some 350 species of wildlife, including imperiled sage grouse. (AP Photo/Don Ryan, File)

FILE - In this June 7, 2017, file photo, two wild elephants, part of a herd that arrived at a wetland near the Thakurkuchi railway station engage in a tussle on the outskirts of Gauhati, Assam, India. Development that’s led to loss of habitat, climate change, overfishing, pollution and invasive species is causing a biodiversity crisis, scientists say in a new United Nations science report released Monday, May 6, 2019. (AP Photo/ Anupam Nath, File)

FILE - In this Aug. 14, 2012 file photo a man tosses dirt on a fire as he tries to save his home on Bettas Road near Cle Elum, Wash. Federal officials have released a plan to save sagebrush habitats in Western states that support cattle ranching, recreation and 350 wildlife species, including imperiled sage grouse. Officials say the 248-page document released this month is a paradigm shift relying on advances in technology and analytics to categorize sagebrush areas based on resistance and resilience to wildfire. (AP Photo/Elaine Thompson,File)

FILE - This Sept. 26, 2018 file photo provided by the National Park Service shows a 4-year-old female gray wolf emerging from her cage at Isle Royale National Park in Michigan. Environmental research projects on endangered animals and air and water quality are being delayed and disrupted by the monthlong partial federal government shutdown and not just those conducted by government agencies. (National Park Service via AP, File)

In this July 27, 2018 photo, Susan Hewitt photographs a daisy-like weed known as 'shaggy soldier' and adds it to iNaturalist, the app she uses to participate in the New York City EcoFlora project. "If people could just take a few minutes to look at nature closely, I think they would be blown away," Hewitt said. Hundreds of New Yorkers are working with researchers to find and catalog wild plants in their city. They’re taking pictures with their smartphones as they walk the streets. Participants have already found invasive species, plants never documented before in New York City, and endangered native weeds. (AP Photo/Emiliano Rodriguez Mega)

Jamie Bassett, a crabber from Chatham, Mass., gives presentation on culinary uses for the green crabs, at a conference, Wednesday, June 6, 2018, in Portland, Maine. Food scientists have gathered to find a way to monetize invasive green crabs, which are a major pest in shellfish harvesting communities. (AP Photos/Robert F. Bukaty)