Posts Tagged: Rangeland Management
HREC and Post-Fire Research Opportunities
What is HREC?
The UC Hopland Research & Extension Center (HREC) is a multi-disciplinary research and education facility in Mendocino County located in the foothills of the Coast Range about two hours north of Berkeley. As part of the UC system for over 65 years, we are stewards of more than 5,300 acres of oak woodland, grassland, chaparral, and riparian environments. Elevation at the center ranges from 500 ft to 3,000 ft. HREC currently maintains a research flock of about 500 breeding ewes that have been the subjects of numerous studies on ranching practices, range management, livestock nutrition, wool production and breeding. Field experiments and demonstrations conducted here since 1951 have led to more than 1,500 publications in animal science, entomology, plant ecology, public health, watershed management, and wildlife biology. Our website is hrec.ucanr.edu.
The River Fire
As part of the Mendocino Complex fire, the River Fire burned through HREC on the evening of July 27 and into July 28. Approximately 3,000 acres of our center burned in this fire. Due to the concentrated efforts of Center staff and Cal Fire crews, all of our employees, residents, sheep, livestock dogs, offices and residences were saved. Below please find the burn map of our property. All of the black area to the north was burned and the dark red patches were areas of vegetation that remained unburned. The fire intensity varied greatly as did oak survival. You will see two smaller burned areas in the southern part of the property that were prescribed burns performed in June of this year.
While this was a blow to current research, pastures, and water infrastructure, we also see this as a wonderful opportunity. Due to extensive historical data sets and ongoing research projects, coupled with a variety of grazed and ungrazed pastures, and prescribed burn plots for comparison with wildfire, there is enormous potential for pre- and post-fire studies in the fields of:
- Watersheds and hydrology; fire science; plant science; soil science; entomology and parasitology; wildlife and wildlife ecology; rangeland management; grazing practices as fire suppression…..
To support this research, HREC offers:
- A well maintained network of roads that accesses almost all parts of the property, vehicles to use.
- A fully equipped shop staffed by employees skilled in fabrication and repair of research equipment
o Electrical, wood working, welding and metal fabrication, mechanical
- Skilled staff trained in field work techniques, with long histories of successful research support
- Fiber optic internet with Wi-Fi access throughout headquarters, strong cell service in most areas
- A vault of raw data, photos, and final papers from research conducted at HREC.
- Warehouses for storing equipment, a variety of accommodations from dorms to private houses
- Wet and dry lab space (undergoing renovation during fall 2018, available spring 2019)
- Lysimeter with available watering system, electrical connections, and fiber optic access point
- A research flock of sheep consisting of just under 500 breeding ewes, with all needed facilities and RFID tracking
- Fenced pastures and biological reserve areas for different treatment plots and controls
- A fully equipped conference facility with A/V equipment and fiber optic connections
- Zoom meeting on September 7th, 10am. More in depth information, Q&A.
- Field day on October 19th, 10am-5pm. Presentations, brainstorming, Q&A, site tours, available accommodations
- To register for either event follow this link: http://ucanr.edu/survey/survey.cfm?surveynumber=25451
Contact: HREC Interim Director John Bailey, firstname.lastname@example.org, (707) 744-1424 x 112
On December 1st and 2nd we enjoyed bringing together a group of over 60 workshop attendees from diverse perspectives, including researchers, regulatory bodies, environmental non-profits and community members to talk through the issues of ranching on a landscape rich in wildlife and the challenges associated with it.
"Living with Wildlife While Managing Working Landscapes" was a two day event. Day 1 was organized by USDA APHIS Wildlife Services and brought us on a journey through the research that has been conducted on control of predators, right up to the present day and the current methods available including non-lethal methods such as guardian animals and fladry.
Day 2 allowed time for further discussion in small groups and the chance to hear from Mendocino County producers about the responsibility they feel to keep their animals safe and healthy for the duration of their lives on the ranch.
The event was a great success, allowing deeper understanding of what is sometimes an over simplified topic with strong emotion attached to it. As one attendee put it "what I realize after this event is that I knew nothing of this subject before it!"
The answers are not simple and the information provided expressed that each ranch is different and will need a wide range of tools to deter predators from their stock. That toolkit may include a relationship with Wildlife Services and their local wildlife specialist alongside guardian animals, minimizing attractants, improved fencing and pasture rotation. HREC hopes to assist ranchers to understand the best methods available to them that make both ecological and economical sense for their ranch by providing a number of training opportunities in 2016.
You can view the agenda, available presentations and notes from the small group discussions up on our website now, by visiting:
Impacts of soil warming and plant roots on organic matter decomposition in a Mediterranean grassland
Accurate understanding of soil carbon cycling is critical for predicting future climate. Decomposition of root litter and its transformation into soil organic matter are critical processes of soil carbon cycling. Thanks to support from the U.S. Department of Energy's Terrestrial Ecosystem Science program, a team led by Dr. Margaret Torn from Lawrence Berkeley National Laboratory have been studying the impacts of soil warming and plant rhizosphere on decomposition of 13C-labeled roots buried at two soil depths using a field lysimeter facility at Hopland Research and Extension Center, California.
The lysimeters contain soil columns of 38-cm diameter and 48-cm depth and annual grasses dominated by wild oats (Avena barbata). The experiment has three treatments (planted-ambient, planted-warming by 4°C, and unplanted-ambient). 13C-labeled Avena fatua roots were added to two depths (8-12 and 38-42 cm). The team will quantify the fate of added root litter in CO2 efflux from soil surface, dissolved organic carbon (DOC) leached from the bottom drain, and organic carbon remaining in bulk soil and different physical fractions for two growing seasons.
First season results show strong role of soil moisture in controlling soil carbon cycling in this Mediterranean ecosystem. Soil warming enhanced plant growth and ecosystem respiration in the early growing season with high soil moisture, while it suppressed plant growth and ecosystem respiration in the late growing season when soil moisture was limited. The team will continue measurements on CO2 flux, DOC loss, and organic carbon recovery in soil fractions, as well as collaborate with microbial ecologists and ecosystem modelers to better understand the underlying processes and to improve the models used for prediction of our future climate.