The subgenus Nostocoladius of Cricotopus is recorded in Oriental China for the first time. The detail redeseription of Cricotopus （Nostocoladius） lygropis Edwards is presented. C. （N..） seiryuabeus Sasa, Suzuki ＆...The subgenus Nostocoladius of Cricotopus is recorded in Oriental China for the first time. The detail redeseription of Cricotopus （Nostocoladius） lygropis Edwards is presented. C. （N..） seiryuabeus Sasa, Suzuki ＆ Sakai is treated as a junior synonym of C. （N.） lygropis. A key to the known male imagines in the world of the subgenus Nostocoladius is given.展开更多
A long-term study of adult non-biting midges （Chironomidae） active in winter on the snow in mountain areas and lowlands in Poland yielded 35 species. The lowland and mountain communities differed significantly in th...A long-term study of adult non-biting midges （Chironomidae） active in winter on the snow in mountain areas and lowlands in Poland yielded 35 species. The lowland and mountain communities differed significantly in their specific composition. The mountain assemblage was found to be more diverse and abundant, with a substantial contribution from the subfamily Diamesinae, whereas Orthocladiinae predominated in the lowlands. Orthocladius wetterensis Brundin was the most characteristic and superdominant species in the winter-active chironomid communities in both areas. Only a few specimens and species of snow-active chironomids were recorded in late autumn and early winter. The abundance ofchironomids peaked in late February in the mountain and lowland areas with an additional peak in the mountain areas in early April. However, this second peak of activity consisted mainly of Orthocladiinae, as Diamesinae emerged earliest in the season. Most snow-active species emerged in mid- and late winter, but their seasonal patterns differed between the 2 regions as a result of the different species composition and the duration of snow cover in these regions. Spearman＇s rank correlation coefficient tests yielded positive results between each season and the number of chironomid individuals recorded in the mountain area. A positive correlation between air temperature, rising to ＋3.5 ~C, and the number of specimens recorded on the snow in the mountain community was statistically significant. The winter emergence and mate-searching strategies of chironomids are discussed in the light of global warming, and a brief compilation of most important published data on the phenomena studied is provided.展开更多
基金Financial support from the National Natural Science Foundation of China (31272284, 31201739, J1210005,31101624)the Zhejiang Provincial Natural Science Foundation of China (Y3100486)Fauna of China (FY120100)
文摘The subgenus Nostocoladius of Cricotopus is recorded in Oriental China for the first time. The detail redeseription of Cricotopus （Nostocoladius） lygropis Edwards is presented. C. （N..） seiryuabeus Sasa, Suzuki ＆ Sakai is treated as a junior synonym of C. （N.） lygropis. A key to the known male imagines in the world of the subgenus Nostocoladius is given.
文摘A long-term study of adult non-biting midges （Chironomidae） active in winter on the snow in mountain areas and lowlands in Poland yielded 35 species. The lowland and mountain communities differed significantly in their specific composition. The mountain assemblage was found to be more diverse and abundant, with a substantial contribution from the subfamily Diamesinae, whereas Orthocladiinae predominated in the lowlands. Orthocladius wetterensis Brundin was the most characteristic and superdominant species in the winter-active chironomid communities in both areas. Only a few specimens and species of snow-active chironomids were recorded in late autumn and early winter. The abundance ofchironomids peaked in late February in the mountain and lowland areas with an additional peak in the mountain areas in early April. However, this second peak of activity consisted mainly of Orthocladiinae, as Diamesinae emerged earliest in the season. Most snow-active species emerged in mid- and late winter, but their seasonal patterns differed between the 2 regions as a result of the different species composition and the duration of snow cover in these regions. Spearman＇s rank correlation coefficient tests yielded positive results between each season and the number of chironomid individuals recorded in the mountain area. A positive correlation between air temperature, rising to ＋3.5 ~C, and the number of specimens recorded on the snow in the mountain community was statistically significant. The winter emergence and mate-searching strategies of chironomids are discussed in the light of global warming, and a brief compilation of most important published data on the phenomena studied is provided.
