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Posts Tagged: Climate Change

Protected areas needed across climates to safeguard biodiversity

Fjordland National Park in New Zealand. Some protected area networks, such as in New Zealand, are projected to capture more of the current climate than others in the future as climate warms. Photo by Paul Elsen

Around the world, countries have established protected areas as the primary defense to reduce widespread biodiversity loss and guard vulnerable habitats. However, species and ecosystems are adapted to particular climates—as those climates shift across and outside of protected area boundaries, species may track them into unprotected landscapes where human land uses degrade conservation potential. 

In a new study published in Science Advances  today, Berkeley researchers offer a broad analysis of how protected areas will continue to capture the climates suitable for species into the future. The study was led by Paul Elsen, a climate adaptation scientist at the Wildlife Conservation Society and former postdoctoral researcher in the Department of Environmental Science, Policy and Management, and it was co-authored with Cooperative Extension specialist Adina Merenlender, recent Ph.D. graduate Eric Dougherty, and Bill Monahan, currently with the U.S. Forest Service. 

The authors first determined how climate is expected to change within all terrestrial protected areas globally by utilizing data from several major global climate models and maps of protected areas. They found that over the next 50 to 80 years, the total amount of protected land situated in both warm and cold climates, over a wide range of annual precipitations, is expected to decline significantly.

“We calculate that most countries will fail to protect over 90% of their available climate at current levels, forcing many species to shift into unprotected lands,” says Merenlender.

Species or ecosystems adapted to specific climatic conditions would disproportionately be impacted, such as those in tropical and subtropical moist broadleaf forests, boreal forests, tundra, savannas, grasslands and shrublands.

The authors then tested how different mitigation and adaptation strategies might work to limit the amount of change species may experience in protected areas within countries, thereby reducing species' vulnerability. For example, they investigated whether greenhouse gas mitigation or the addition of new protected areas were more effective for building resilience to climate change. 

“Protected areas are invaluable to conserving biodiversity, but where those protected areas are positioned in relation to available climates can have a huge influence on their ability to reduce species' vulnerability to climate change,” says Elsen.

In Gorongosa National Park in Mozambique, biodiversity is less likely to find the same suitable climates in protected areas in the future as the climate changes. Photo by Paul Elsen

If countries were to expand protected areas to double the diversity of climates under protection, the authors find, they would retain 118% more land area of today's protected climates into the future. By contrast, reducing greenhouse gas emissions in accordance with global targets would increase retention of currently protected climates by 102%.  

“If we adopt a strategy for increasing protection that seeks to maximize the diversity of climate types represented within protected areas—for example, cold, warm, hot, wet, temperate, arid, etc.—we stand a much better chance that protected areas will continue to encompass the climatic conditions that support currently protected biodiversity,” says Elsen, lead author of the study.

The authors were surprised to find that simply establishing more protected areas wasn't the solution to building resilience. “Whether it's ‘half-earth' or a more modest target, we need more protected areas but they must be climate smart,” says Merenlender. “This means protecting a full range of climate types, or parks will not protect biodiversity as intended into the future.”

The long-term conservation potential of protected areas depends on careful maintenance of appropriate biotic and abiotic conditions that promote biodiversity. The authors stress that decisions about land use, which are socio-economic in nature, need to also account for conservation and ecosystem health. “Species that track climate into unprotected landscapes may face landscapes that are highly modified by agriculture, infrastructure, development, and other human activities, so it is still critical that we work to increase the suitability of unprotected lands for biodiversity, too,” says Elsen.

The study includes recommendations for planning for future reserves that stand to better protect biodiversity and will be more resilient to climate change over the long term.

Read the study on the Science Advances website.

Posted on Wednesday, June 17, 2020 at 8:34 PM
  • Author: Jacob Shea, jacob_shea@berkeley.edu
Focus Area Tags: Environment

Imperial Valley farmers bring home over $1 million in CDFA Healthy Soil grants

We would like to congratulate the 13 Imperial County farmers who received a total of $1,073,697.97 from CDFA's Healthy Soil Incentive Program.

California Department Food and Agriculture (CDFA) has been providing financial initiatives to California growers and ranchers through its Healthy Soil Program to enable farmers to implement conservation management practices that sequester carbon, reduce atmospheric greenhouse gases (GHGs), and improve soil health. 

These 13 award-winning projects will reduce GHG emissions by an estimated 3,689.1 metric tons of carbon dioxide per year, which is equivalent to 797 passenger vehicles driven for one year. 

This is a groundbreaking achievement for our county and a huge jump from last year's HSP solicitation period, demonstrating that farmers in this region are becoming very interested in adopting climate smart agricultural practices, provided they have funding. 

“These climate smart agriculture incentive programs assist farmers in doing their part to try to sequester carbon and help sustain the environment,” Ronnie Leimgruber, one of the 13 Healthy Soils grant recipients, says. “Being awarded this grant will allow me to apply more compost than I normally would.” 

2020 is the first year that Imperial County growers and ranchers applied for the Healthy Soil grants, which began in 2017. 

Imperial County farmer Ronnie Leimgruber said, “Being awarded this grant will allow me to apply more compost than I normally would.” Photo courtesy of CDFA

With a maximum award of $100,000 per award, this grant was a great opportunity for California farming operations to pilot conservation management practices such as compost application, cover crops, nutrient management, and reduced till/no till for 3 to 10 years (depending on the practice) with minimal financial investment on their part. For the farmers and ranchers interested in the environmental benefits but unable to afford the cost of implementing these practices on their own, this program is a chance to try them firsthand. 

UC Cooperative Extension in Imperial County and Imperial County Farm Bureau partnered to provide technical assistance for the Healthy Soils Program and Alternative Manure Management Program for 2020. Together we conducted outreach, held a series of workshops and assisted individuals with their grant applications. 

The goal was to bring awareness to these climate smart agriculture incentive programs and assist growers in applying and maximizing their chances of receiving grants. Overall, Imperial County saw great progress from the prior year in the number of applicants and amount of awards, drawing recognition from Assemblymember Eduardo Garcia. 

We are optimistic that these programs will continue to grow in future years, assisting local farmers in implementing additional farming practices that continue to benefit the environment. We encourage grant recipients to contact us for assistance with project implementation and data collection. 

This year, CDFA's Healthy Soil Incentive Program received a total of 578 applications requesting $37.87 million, exceeding the $22 million available funds. 

CDFA secretary Karen Ross stated, "Soil has the transformative power to help us stabilize our changing climate by capturing greenhouse gas emissions from the atmosphere and storing them underground, through the assistance of living plants and microbes, that improve both the atmosphere and the soil." 

These conservation management practices are known to promote on-farm sustainability by building organic matter, encouraging nutrient cycling, increasing water holding capacity, reducing soil compaction, and lessening the need for synthetic fertilizers. In general, if you enrich your soil, it will boost the productivity of your cropping systems. However, every agricultural operation varies in its needs, the benefit it obtains from different conservation management practices depends on the location, size, crop rotation, irrigation system, and soil type. To enhance applicability according to site specific needs, CDFA allows applicants to choose from four categories, totaling 28 eligible practices selected from the United States Department of Agriculture (USDA) Natural Resources Conservation Services (NRCS) conservation practices standards. 

For more information about climate smart agriculture, please contact me, Kristian Salgado, at kmsalgado@ucanr.edu or at (442) 265-7700.

 

Posted on Friday, June 12, 2020 at 2:16 PM
Focus Area Tags: Agriculture, Environment, Natural Resources

Entomologist Michael Hoffmann: Our Distinguished Alumnus

Michael Hoffmann sharing his expertise on climate change.

Congratulations to noted entomologist Michael Hoffmann, an emeritus professor at Cornell University, for his selection as the 2020 Thomas and Nina...

Michael Hoffmann sharing his expertise on climate change.
Michael Hoffmann sharing his expertise on climate change.

Michael Hoffmann sharing his expertise on climate change.

Posted on Wednesday, March 11, 2020 at 5:00 PM
Focus Area Tags: Agriculture, Economic Development, Environment, Innovation, Natural Resources, Pest Management

California trees are suffering under climate change and invasive pests

Branch die-back in a Chinese flame tree because of invasive shothole borer infestation. (Photo: Beatriz Nobua-Behrmann)
Trees are facing stress from a variety of pressures in California, including climate change and exotic invasive pests, reported Jeanette Marantos in the Los Angeles Times

“There are lots of invasive pests everywhere because of global warming and the movement of plant materials in general,” said Philippe Rolshausen, UC Cooperative Extension subtropical tree specialist at UC Riverside.

Yellowing leaves, a thinning canopy and branch die-back are symptoms that the tree is sick. UC Master Gardeners, headquartered in UCCE county offices across the state, can provide free help, the article said.

Marantos listed possible reasons for common tree symptoms:

Yellow leaves: May be due to a lack of nutrients. A sudden jolt of fertilizer isn't the best solution. Homeowners often remove the best fertilizer and mulch for trees — their own fallen leaves.

Thinning canopies and branch die-back: May be the result of a soil-born disease, such a phytophthora, caused by excessive water. “Homeowners have a tendency to over-irrigate a tree that's not doing well, but soil-borne diseases actually thrive in wet soils, so that's making things even worse,” Rolshausen said. “Trees don't like standing water on their root systems because they can't breathe.”

Huanglongbing of citrus: Invested trees send up shoots of bright yellow leaves. Eventually, new leaves get twisted and mottled and the fruit stops ripening. The disease was first spotted in Southern California in the late 1990s and has since been detected in Los Angeles, Orange, San Bernardino and Riverside counties, according to a map prepared by University of California Agriculture and Natural Resources.

The Times article also recommended the UC Integrated Pest Management Program website to learn how to diagnose and control tree insects and diseases.

Posted on Monday, March 2, 2020 at 8:59 AM
Focus Area Tags: Yard & Garden

Warm winter renews concerns about orchard chill

National Public Radio highlighted a growing concern for San Joaquin Valley tree fruit and nut farmers - diminishing winter chill in an age of climate change. "Warm winters mess with nut trees' sex lives," reported Lauren Summer on Morning Edition.

For example, adequate winter chill allows female and male pistachio trees to wake up simultaneously, which is ideal for pollen to be available for wind to carry it to blooms on female trees.

Fresno State agriculture professor Gurreet Brar, a former UC Cooperative Extension advisor, is testing whether horticultural spray application at different chill-hour intervals will trick trees into thinking they've been colder. Normally, the spray is used on fruit and nut trees to control insects, but it's also known to alter the tree's dormancy period.

"It's supposed to help the tree and buds wake up normally and have a normal bloom," Brar said.

Summer also spoke to Katherine Jarvis-Shean, UC Cooperative Extension orchard systems advisor in Yolo County. 

"We're on this (climate change) march and it's really just a matter of how bad it's going to be, not whether it's happening or not," Jarvis-Shean said. "Threatening those crops is really threatening the livelihoods of a lot of Californians."

Fruit and nut trees that require the most winter chill will run into trouble by mid-century, when experts predict consistently warmer weather, Summer reported.

Bing cherries need about 1,000 hours under 45 degrees for healthy dormancy, a level that they are achieving less frequently due to climate change.

"Bing cherries, which is really the marquee variety in California, won't get enough chill," Jarvis-Shean said. "We'll need to be breeding new varieties that still have that rich ruby flesh and that juicy flavor that can do well under those low chill conditions."

Better-adapted trees may be the only strategy in the long-run, she said. Efforts are already underway to breed new varieties of pistachios that can handle warmer winters.



Posted on Wednesday, February 19, 2020 at 9:27 AM
Focus Area Tags: Agriculture

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