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Title: Threshold responses to interacting global changes in a California grassland ecosystem

Building on the history and infrastructure of the Jasper Ridge Global Change Experiment, we conducted experiments to explore the potential for single and combined global changes to stimulate fundamental type changes in ecosystems that start the experiment as California annual grassland. Using a carefully orchestrated set of seedling introductions, followed by careful study and later removal, the grassland was poised to enable two major kinds of transitions that occur in real life and that have major implications for ecosystem structure, function, and services. These are transitions from grassland to shrubland/forest and grassland to thistle patch. The experiment took place in the context of 4 global change factors – warming, elevated CO2, N deposition, and increased precipitation – in a full-factorial array, present as all possible 1, 2, 3, and 4-factor combinations, with each combination replicated 8 times.
 [1] ;  [2] ;  [2]
  1. Carnegie Inst. of Science, Stanford, CA (United States)
  2. Stanford Univ., CA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
Carnegie Inst. of Science, Stanford, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
Stanford Univ., CA (United States)
Country of Publication:
United States