Progress in marbled murrelet habitat
Because numbers of marbled murrelets within the watershed are a result of influences outside the watershed and outside our control, we measure progress under the HCP by focusing on upland forest habitat protection and restoration.
Measuring Success for Protecting Watershed Habitats
Active forest habitat restoration projects encompass only a small fraction of the land area in the watershed. Most of the forest will simply be protected from threats and left alone to develop the old-growth structure required by marbled murrelets through passive restoration. We measure our success in protecting watershed habitats for marbled murrelets by documenting our efforts in preventing and suppressing fire.
View more information on habitat protection metrics.
Measuring Success for Upland Forest Habitat Restoration
We document number and location of areas treated with variable density thinning and development of large trees capable of supporting a murrelet nest.
View upland forest habitat restoration metrics.
Experimental Murrelet Nesting Habitat Enhancement Project
In 2010 we implemented an experimental marbled murrelet nesting habitat enhancement project. We are attempting to accelerate the development of nesting platforms (large branches in the upper canopy, often with moss or mistletoe present) in selected second-growth trees. Our experimental design included two treatments:1) gaps around dominant or co-dominant trees to increase light availability to increase/maintain branch growth, and 2) topping trees to create unique branching structure in the upper canopy.
View a poster (pdf) on this project presented at the Ecological Society of America Conference in 2012.
For more information, view the As-Built Report (pdf) for the Marbled Murrelet Habitat Restoration Experiment.