Habitat suitability models of saproxylic red-listed boreal forest species in long-term matrix management: Cost-effective measures for multi-species conservation

Despite mounting evidence of invasive species’ impacts on the environment and society,our ability to predict invasion establishment, spread, and impact are inadequate Efforts to explainand predict invasion outcomes have been limited primarily to terrestrial and freshwater ecosystemsInvasions are also common in coastal marine ecosystems, yet to date predictive marine invasion mod-els are absent Here we present a model based on biological attributes associated with invasion suc-cess (establishment) of marine molluscs that compares successful and failed invasions from a groupof 93 species introduced to San Francisco Bay (SFB) in association with commercial oyster transfersfrom eastern North America (ca 1869 to 1940) A multiple logistic regression model correctly classi-fied 83% of successful and 80% of failed invaders according to their source region abundance at thetime of oyster transfers, tolerance of low salinity, and developmental mode We tested the generalityof the SFB invasion model by applying it to 3 coastal locations (2 in North America and 1 in Europe)that received oyster transfers from the same source and during the same time as SFB The model cor-rectly predicted 100, 75, and 86% of successful invaders in these locations, indicating that abun-dance, environmental tolerance (ability to withstand low salinity), and developmental mode not onlyexplain patterns of invasion success in SFB, but more importantly, predict invasion success in geo-graphically disparate marine ecosystems Finally, we demonstrate that the proportion of marine mol-luscs that succeeded in the latter stages of invasion (ie that establish self-sustaining populations,spread and become pests) is much greater than has been previously predicted or shown for otheranimals and plantsKEY WORDS: Invasion · Bivalve · Gastropod · Mollusc · Marine · Oyster · Vector · Risk assessment

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Differentiating successful and failed molluscan invaders in estuarine ecosystems

http://www.fsl.orst.edu/flel/pdfs/Ritchie%20et%20al%202009%20FEM.pdf

Effects of landscape composition and configuration on northern flying squirrels in a forest mosaic

We analyzed the responses of small mammals to clear-cutting in temperate and boreal forests in Europe. We conducted a meta-analysis of published research on most often studied small mammal species (the striped field mouse, the yellow-necked mouse, the wood mouse, the field vole, the common vole, the bank vole, the Eurasian harvest mouse, the common shrew and the Eurasian pygmy shrew), comparing their abundance on clear-cuts and in unharvested stands. For four other species (the gray-sided vole, the Siberian flying squirrel, the Eurasian red squirrel and the hazel dormouse), we provide a qualitative review of their responses to forest harvest. Results of the meta- analysis suggest that common species of small mammals usually increase in abundance after clear-cutting or are unaffected by this disturbance. As an exception, the yel- low-necked mouse declines after clear-cutting in boreal but not in temperate forest. The qualitative review suggests that the responses of more specialized (e.g., arboreal) species to forest harvest are more varied than the responses of generalist species included in the meta-analysis. For some species of small mammals (e.g., the Siberian flying squirrel), habitat loss resulting from forest harvest is a major threat.

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Maarit Ukkola

Papers

Building and evaluating predictive occupancy models for the Siberian flying squirrel using forest planning data