Taxonomy, distribution, biology and conservation status of Finnish Auchenorrhyncha (Hemiptera: Fulgoromorpha et Cicadomorhpa)

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Title: Taxonomy, distribution, biology and conservation status of Finnish Auchenorrhyncha (Hemiptera: Fulgoromorpha et Cicadomorhpa)
Author: Söderman, Guy
Publisher: Finnish Environment Institute
Date: 2007
Language: en
Belongs to series: The Finnish Environment 7/2007
ISBN: 978-952-11-2594-2
ISSN: 1796-1637
Abstract: The Finnish Fauna of Auchenorrhyncha is richer than previously anticipated. At the end of this 4-year research 389 species are known from the country, which is 55 (17 %) more than was known during the latest 2000 assessment of species. Of the new species 13 has been found in more thorough taxonomic research. Thirteen species are believed to be old species with relic small occurrences in the country. Twenty-six species are considered expansive that have established permanent populations in Finland and 3 species are classified as long-distance migrants. Diversifying the collection techniques has brought much new faunistic knowledge. Of the known species ca 60 % have been collected with light-traps, ca 40 % with color traps, ca 50 % with interception traps and ca 20 % in pitfalls. More than 1,000 new regional records were made during the research period. The report highlights the plant dependence of the nymphs. Only 2.5 % of the native species are regarded as polyphagous. Monophages counts to 41.1 % and oligophages to 56.4 % of all species. The high degree of specialization and the tendency for selecting specific breeding habitats increase the rarity of the species and the potential loss of local populations due to changes in land use. Plant- and leafhoppers comprise a sensitive indicator group for ecological impact assessments. The information basis on the Finnish Auchenorrhyncha has grown considerably. Almost all species, ie. 380 (98 %) have now a good data basis for conservation assessment. Only 3 species are considered data deficient and 5 species are set in the category not applicable. Seven species are assessed to be regionally extinct, 17 to critically endangered, 37 to endangered and 26 to vulnerable. Near threatened species counts to 37 and 255 species have sustainable populations in Finland.
Subject: hyönteiset
uhanalaiset eläimet

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