Shrubland Resilience and Recovery After Disturbance

Monday, August 11, 2014: 1:30 PM-5:00 PM
306, Sacramento Convention Center
Marcia Narog, USDA Forest Service
Jan L. Beyers, Pacific Southwest Research Station
Marcia Narog, USDA Forest Service
California is dominated by impressive shrublands called chaparral. Like other shrublands around the globe, they grow along seaside cliffs and become elfin woodlands on mountain tops. Shrublands are typically understated biomes that receive little attention for their significant contributions to biodiversity and environmental services. Many shrublands are renowned for their hardiness and resilience. They function as important components of ecosystem structure for such services as carbon sequestration, soil stabilization and wildlife habitat. Repeated disturbances combined with climatic changes are causing shrublands to be lost and sometimes replaced by invasive species. Chronic anthropogenic perturbation coupled with global climate change may tilt the balance of shrubland persistence toward imperiled status as has happened with the tall grass prairie and old growth forests. This sessions’ objective brings together information on the state of shrublands from around the world to learn how to better protect, maintain and restore them. Information voids include where and when our shrublands are at risk and how to refine parameters for recognizing the tipping points when natural regeneration can no longer be sustained. Furthermore, development of protocol on how to re-establish shrublands once lost is critical. Understanding the global to physiological criteria needed for survival of these generally resilient ecosystems will contribute to conservation efforts of other ecosystems and species at risk. Experts from different continents will address shrubland threats, plant survival traits and what is being done to identify and ameliorate shrubland decline and loss. Speakers will address shrubland concerns on multiple levels. Global change threats to shrubland resilience will approach shrubland persistence with regard to large-scale changes. Perspective at the landscape level will show how the resilience of sclerophyllous shrublands depend on fire intervals, habitat and rainfall. A closer look at physiological resilience of shrubs to drought, wildfire, and freezing will delve into plant level strategies that improve survival under environmental stresses. Restoration efforts made in shrub community evolution in soil bioengineering projects will demonstrate how to approach shrubland recovery for improving multiple ecosystem services. Similarities and differences found amongst the worlds’ shrublands should lead to greater understanding of and hence solutions for sustaining these magnificent biomes.
1:30 PM
 Evolution of shrub communities in soil bioengineering projects on Vesuvius
Carlo Bifulco, Universidade de Lisboa; Pasquale Giugliano, Parco nazionale del Vesuvio; Francisco Castro Rego, Universidade de Lisboa
1:50 PM
 A history of megafires and extreme droughts in California
Jon E. Keeley, U.S. Geological Survey
2:10 PM
 Limits in the resilience of chaparral to severe drought
Stephen D. Davis, Pepperdine University; R. Brandon Pratt, California State University, Bakersfield; Anna L. Jacobsen, California State University, Bakersfield; Frank W. Ewers, California State Polytechnic University, Pomona; Aaron R. Ramirez, University of California; Anjel M. Helms, The Pennsylvania State University; Martin D. Venturas, University of Utah; Evan D. MacKinnon, California State University, Bakersfield
2:30 PM
 Shrub recovery after fire in chaparral of different ages – implications for type-conversion risk
Jan L. Beyers, Pacific Southwest Research Station; Marcia Narog, USDA Forest Service
2:50 PM
 Above and belowground resilience in coastal sage scrub
Edith B. Allen, University of California, Riverside; Sara Jo M. Dickens, Univeristy of California, Riverside; Bridget E. Hilbig, University of California, Riverside; Justin M. Valliere, University of California, Riverside
3:10 PM
3:20 PM
 Chaparral shrub re-establishment on type-converted slopes in southern California
Megan D. Engel, California State University, San Bernardino; Kimberlyn Williams, California State University, San Bernardino; Christopher J. McDonald, UC Cooperative Extension; Jan L. Beyers, Pacific Southwest Research Station
3:40 PM
 Potential for application of filamentous cyanobacteria on chaparral restoration sites
Ted St. John, USDA Forest Service; Marcia Narog, USDA Forest Service
4:00 PM
 Embracing variability: environmental dependence and indirect effects in ecological restoration
Sara Jo M. Dickens, Univeristy of California, Riverside; Seema Mangla, University of California, Berkeley; Katharine N. Suding, University of California at Berkeley; Kristine Preston, US Geological Survey
4:20 PM
 Sleeping with the enemy: Short- and long-term effects of resprouting shrubs on the performance of a post-fire recruiting, carnivorous plant
Maria Paniw, University of Cadiz; Roberto Salguero-Gomez, The University of Queensland; Fernando Ojeda Copete, University of Cadiz
4:40 PM
 Ecological succession as evidenced by colonization of Arctostaphylos host plants by Tamalia galling aphids
Donald G. Miller, California State University, Chico; Colleen A. Hatfield, California State University