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Ponderosa pine forests in the Sierra Nevada have retreated uphill over the past 80 years.

The fraction of runoff into the Sacramento River between April and July has declined over the past century.

Over a 45 year period, the breeding success of this seabird on the Southeast Farallon Island near San Francisco has become more variable. Breeding success is closely linked to the availability of their prey which is affected by ocean conditions.

The number of Chinook salmon returning in the fall to the Sacramento River has become more variable in the last two decades.

Variations in the abundance and composition of copepod populations in the northern portion of the California Current reflect changes in ocean circulation patterns.

Birds and mammals are found at different elevations in three study regions of the Sierra Nevada mountains today compared to a century ago.

Songbird species are showing a diversity of changes in arrival dates at their breeding and wintering grounds.

The highest elevation forests in the Sierra Nevada have more small trees and fewer large trees today than they did in the early decades of the 20th century.

The structure and composition of California’s forests and woodlands have changed over the past 80–year period.

The distribution of vegetation across the north slope of Deep Canyon in Southern California’s Santa Rosa Mountains has moved upward 213 feet over a 30-year period.