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Earthworms (Oligochaeta, Lumbricidae) in the Tundra of Eastern Europe

机译:东欧苔原中的((Oligochaeta,Lu科)

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摘要

It has been established that three earthworm species inhabit tundra landscapes of Eastern Europe: the Eastern European-Siberian Eisenia n. nordenskioldi, cosmopolitan Lumbricus rubellus (sporadic occurrences near the forest edge), and cosmopolitan Dendrobaena octaedra. In the Palaearctic zonal tundra, D. octaedra does not occur east of Tazovskii Peninsula, while E. n. nordenskioldi was not found west of Pechora Bay. The two species coexist in the Arctic only in Nenets and Yamalo-Nenets Autonomous okrugs. New earthworm records in the northern part of Eastern Europe have been reported. The significant habitat plasticity of D. octaedra and E. n. nordenskioldi in tundra landscapes is demonstrated. It is found that the cold-resistant soil-litter E. n. nordenskioldi prefers open habitats (dwarf shrub tundras, meadows, and marshes), while the less cold-tolerant (in the worm phase) litter D. octaedra is more abundant under the shrub or crooked forest canopy, possibly, because of the milder wintering conditions there (i.e., the presence of leaf litter and snow retention). It is suggested that the habitat area of E. n. nordenskioldi in Eastern Europe was much larger during the last glacial epoch.
机译:已经确定三种three物种栖息在东欧的苔原地貌上:东欧-西伯利亚Eisenia n。 nordenskioldi,世界性的Lumbricus rubellus(在森林边缘附近零星出现)和世界性的Dendrobaena octaedra。在古太平洋带状苔原中,八角形藻不出现在塔佐夫斯基半岛以东,而E. n。则不存在。在Pechora湾以西未发现nordenskioldi。这两个物种仅在涅涅茨人和雅马洛涅涅茨人自治的okrugs中共存于北极。据报道东欧北部有新的worm记录。 D. octaedra和E. n。的显着生境可塑性。展示了苔原景观中的nordenskioldi。发现耐寒的土壤凋落物E.n。 nordenskioldi更喜欢开放的生境(矮灌木苔原,草地和沼泽),而耐寒性较差(蠕虫期)的凋落物D. octaedra在灌木或弯曲的林冠层下更为丰富,这可能是由于冬季条件温和那里(即存在落叶和积雪)。建议将其作为栖息地。在上一个冰川时期,东欧的nordenskioldi大得多。

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  • 来源
    《Biology Bulletin》 |2019年第5期|438-449|共12页
  • 作者单位

    Russian Acad Sci Severtsov Inst Ecol & Evolut Moscow 119071 Russia;

    Russian Acad Sci Ural Branch Inst Biol Komi Sci Ctr Syktyvkar 167982 Russia;

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