Habitat specificity

Some species are rare because they depend on rare, declining, or vulnerable habitats in Minnesota.

The southern brook lamprey requires different microhabitats during different portions of its life history. Adults need very clear, small to large streams and rivers, with swift, permanent flow over sand and gravel riffles. Larvae need fine sediment or organic debris in areas with embedded woody debris for burrowing, usually in lower gradient stream segments.

Southern Brook Lamprey (Ichthyomyzon gagei)

Habitat specificity

Ten reasons why species become rare

Habitat loss and degradation Invasive species and competition Pollution Habitat specificity Persecution and exploitation

Peripheral populations Vunerable characteristics Relict populations Disease Global climate change

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