By a News Reporter-Staff News Editor at Life Science Weekly -- Data detailed on Life Science Research - Biological Invasions have been presented. According to news reporting from Crater Lake, Oregon, by NewsRx journalists, research stated, “The signal crayfish (Pacifastacus leniusculus) was introduced to Crater Lake in 1915 and now threatens the local extinction of an endemic salamander, the Mazama newt (Taricha granulosa mazamae). More than a century after their introduction, crayfish have expanded in distribution to occupy nearly 80% of the lakeshore.”
The news correspondents obtained a quote from the research, “Although newts remain in uninvaded areas, they are almost entirely absent in crayfish occupied areas. Abundance of benthic macroinvertebrates was dramatically reduced in locations with crayfish compared with areas of the lake where crayfish were absent. Isotopic signatures of newt and crayfish tissue confirm overlap in the diets of the two species and demonstrate their similar position in the Crater Lake food web. Mesocosm experiments conducted with newts and crayfish revealed that crayfish prey directly on newts, displace newts from cover, and generally alter newt behavior.”
According to the news reporters, the research concluded: “Combined, this evidence suggests that further crayfish expansion likely will cause additional declines in newt abundance and distribution, and could lead to extinction of the unique population of newts in Crater Lake.”
For more information on this research see: Replacement of a unique population of newts (&ITTaricha granulosa&IT &ITmazamae&IT) by introduced signal crayfish (&ITPacifastacus leniusculus&IT) in Crater Lake, Oregon. Biological Invasions , 2018;20(3):721-740. Biological Invasions can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; Biological Invasions - http://www.springerlink.com/content/1387-3547/)
Our news journalists report that additional information may be obtained by contacting S.F. Girdner, NPS, Crater Lake, OR 97604, United States. Additional authors for this research include A.M. Ray, M.W. Buktenica, D.K. Hering, J.A. Mack and J.W. Umek.
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2018, NewsRx LLC
CITATION: (2018-05-01), New Biological Invasions Findings from S.F. Girdner and Co-Authors Described [Replacement of a unique population of newts (&ITTaricha granulosa&IT &ITmazamae&IT) by introduced signal crayfish (&ITPacifastacus leniusculus&IT) in Crater Lake, ...], Life Science Weekly, 2452, ISSN: 1552-2474, BUTTER® ID: 015575293
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