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Chino Hills SP - IMAP Pilot Project

Inventory and Monitoring Tasks for the Pilot Project at Chino Hills State Park Have Included:

  • Plant community mapping: This effort included examining aerial photographs and delineating vegetation polygons on a GIS.  All mapped polygons are ground-truthed by vegetation ecologists.  See Chino Hills State Park Vegetation Assessment
  • Sensitive plants: Sensitive plants known to occur include Astragalus brauntonii, Calochortus catalinae, and Dudleya multicaulis. IMAP botanists searched likely habitats for these species and recorded the location, number of plants found, and condition of the populations.  Chino Hills State Park Rare Plants
  • Exotic plants: Exotic plants of highest concern in this park are tree-of-heaven (Ailanthus altissima), giant reed (Arundo donax), fennel (Foeniculum vulgare), Cape ivy (Senecio mikanioides), and various thistles. The locations and extent of infestation of these species was mapped.  Chino Hills State Park Exotic Plants 
  • Prescribed fire: Plots were established to assess changes to vegetation in areas where future prescribed fires may be conducted by CDPR.
  • Small mammals: An on-going study is assessing small mammal populations using a variety of trapping techniques.
  • Bats: The types of bat species present and the habitats they use was determined by a combination of mist-netting captures, and acoustical and roost surveys.
  • Medium and large mammals: The IMAP team coordinated survey efforts for these animals with other government and university researchers working in the area.
  • Rare passerine birds: Least Bell’s vireo, willow flycatcher, and California gnatcatcher are among the known rare bird species in the Chino Hills. The project conducted surveys to locate these species, determine if they are breeding in the park, and monitor nesting success.
  • Nesting birds of prey: Golden eagles, red-tailed hawks, red-shouldered hawks, kestrels, barn owls, and great-horned owls, are known to occur in the park. IMAP surveys located and monitored raptor nests.  Chino Hills State Park Raptors 
  • Terrestrial amphibians and reptiles: The USGS working in cooperation with State Parks has established a set of pitfall-traps to determine what species occur in the park.
  • Aquatic life: Aliso Creek is a perennial stream that was surveyed for fish, amphibians, and turtles.
  • Stream hydrology and water quality: Inland Empire District ecologists conduct sampling for water quantity and quality analysis.
  • Soil erosion and stability: Existing landslides were identified and mapped using GIS.
  • Scenic viewshed and photo points: Permanent photo monitoring points were established at key locations to monitor changes to scenic viewsheds.

The Project Agreement between the Southern Service Center IMAP team and the Inland Empire District, which contains additional details about the inventory and monitoring projects that were conducted at Chino Hills State Park, is available at this link:
Chino Hills SP Pilot Project Agreement