Declining salmon and steelhead populations: new endangered species concerns for the West

Article Abstract:

Salmon has been sustainably harvested by the Indian tribes in the Pacific Northwest for thousands of years. However, the establishment of canneries in the region stimulated large scale harvesting which led to the depletion of chinook salmon stocks in the Columbia River basin. Since salmon stocks are a big factor in the survival of the Pacific salmon species, salmon conservation and rehabilitation measures must concentrate on the stock level to become effective. Restoration of habitat and ensuring natural production are also needed to revive the salmon and steelhead resources in the region.

Natural history, Protection and preservation, Salmon, Steelhead (Fish), Steelhead (Fishes), Pacific Northwest, Northwestern States

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The state of the Southern Rockies Ecoregion: a look at species imperilment, ecosystem protection, and a conservation opportunity

Article Abstract:

The Southern Rockies Ecoregion contains a diversity of ecosystems offering habitat for a wide variety of wildlife species, such as elk, bighorn sheep and black bear, plus several endangered species. Despite the ecoregion's land protection status, it has not escaped human-caused biological degradation. A new study assesses the relationship between the region's national park status and its main ecosystem types using a Geographical Information System to determine the relative level of ecosystem protection. Details of the study are presented.

Environmental aspects, Biotic communities, Mountain States (United States)

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Conservation of native freshwater mussels: an overview

Article Abstract:

Collaboration between private and government agencies were established to prevent the extinction of native freshwater mussels (Unionids) with an estimated 300 recognized species. Their efforts focused on research and conservation education. Habitat changes, invasion of the European zebra mussel and chemical pollution were identified as threats to the Unionids population. Thus, efforts toward the restoration of mussel habitats and the reintroduction of native species have been taken.

Marine resources conservation, Mussels, Fresh-water, Freshwater mussels

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