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Keyword: California

Effects on nonnative fishes on wilderness lake ecosystems in the Sierra Nevada and recommendations for reducing impacts

Publications Posted on: February 27, 2006
Wilderness areas of the Sierra Nevada, California contain thousands of lakes and ponds, nearly all of which were historically fishless. After more than a century of fish stocking, introduced trout are now present in up to 80% of larger lakes. These nonnative fishes have had profound impacts on native fishes, amphibians, and invertebrates.

Restoring natural fire regimes to the Sierra Nevada in an era of global change

Publications Posted on: February 27, 2006
A conceptual model of fire and forest restoration and maintenance is presented. The process must begin with clearly articulated goals and depends upon derivation of science-driven models that describe the natural or desired conditions. Evaluating the extent to which contemporary landscapes depart from the model is a prerequisite to determining the need for restoration.

Returning fire to the mountains: can we successfully restore the ecological role of pre-Euroamerican fire regimes to the Sierra Nevada?

Publications Posted on: February 27, 2006
This paper examines the resultant conditions of Sequoia and Kings Canyon National Park’s burn program relative to knowledge about past fire regimes in this ecosystem. Estimates of past fire-return intervals provide management direction and were used to develop approximations of area burned prior to Euroamerican settlement. This information was used to develop simple methods to compare fire management achievements against historic benchmarks.

Restoration of multiple-rut trails in the Tuolumne meadows of Yosemite National Park

Publications Posted on: February 27, 2006
This study presents the techniques used in a restoration project in Tuolumne Meadows on the old Glen Aulin trail in Yosemite National Park from 1990 to 1994 and the results of follow-up monitoring in the summer of 1998. The project restored the natural hydrology and soils to a 4,200-foot section of abandoned trail which had two to six one-foot deep ruts.