Climate features that influence life cycles, notably severity, seasonality, unpredictability and variability, are summarized for different polar zones. The zones differ widely in these factors and how they are combined. For example, seasonality is markedly reduced by oceanic influences in the Subantarctic. Information about the life cycles of Arctic and Antarctic arthropods is reviewed to assess the relative contributions of flexibility and programming to life cycles in polar regions. A wide range of life cycles occurs in polar arthropods and, when whole life cycles are considered, fixed or programmed elements are well represented, in contrast to some recent opinions that emphasize the prevalence of flexible or opportunistic responses. Programmed responses ale especially common for controlling the appearance of stages that are sensitive to adverse conditions, such as the reproductive adult. The relative contribution of flexibility and programming to different life cycles is correlated with taxonomic affinity (which establishes the general lifecycle framework for a species), and with climatic zone, the habitats of immature and adult stages, and food., Hugh V. Danks, and Lit
The second half of the 18th century marked an extraordinary flowering of music, especially church music in the Czech lands. Monastic churches, in particular, were characterised by a high level of music production performed by choral scholars whose liturgical music was conducted by chosen monks. Some members of religious orders also composed. These were for example M. J. Haberhauer (1746-1799), a member of the Benedictine order situated in Rajhrad near Brno and P. J. Marek (1748-1806) who belonged to the Augustinian monastery in Brno. Both of them got a musical education as choral scholars and remained musically active also after entering orders. Eventually these two authors both performed as chorregents in the 70’s and early 80’s of the 18th century and they collected sacred and secular pieces of music of their more famous and popular contemporaries (C. Ditters, F. X. Brixi, Haydn, etc.). Apart from a few exceptions they were only composing liturgical works. Haberhauer bequeathed 90 compositions, most of whom composed of Mass for choir and solo accompanied with instrumental ensemble as well as vespers and motets. Marek, however, composed only 21 church compositions and most of them consist of Marian antiphons and litanies of Loreto. These were necessary at the Augustinians, given the honor rendered to the picture of Virgin Mary placed in their church. The two monasteries ran a mutual cooperation which can be proved by Haberhauer music collection preserved at Augustinians in Brno. Haberhauer work can be also found in the collections of other Moravian churches and also at Prague Benedictine order. While Marek’s compositions were exclusively connected to the Augustinian monastery in Brno. Their pieces of music are purely purposeful showing features of a musical classicism. Lives and works of both composers are now the subject of research of the author and of Pavel Žůrek from the Ins, Irena Veselá., and Obsahuje bibliografické odkazy