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Берман, Д. И.; Meshcheryakova, E. N.; Alfimov, A. V.; Leirikh, A. N.

doi:10.1023/a:1019222127107

Cited by 17 publications

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“…Total number of earthworms in the Suputinskii State Nature Reserve (now, Komarov Ussuriiskii State Nature Reserve) (32-53 individuals/m 2 ) reported by Gilyarov and Perel' [5,7], is lower than that in our data obtained in the south of Kunashir Island. Accord ing to own and literature data, a common regional fea ture of soil fauna of the Russian Far East is the pres ence of amphipods, leeches, and earthworms of the family Magascolecidae [2,4,7].…”

Section: Discussionmentioning

confidence: 99%

Soil macrofauna of the south of Kunashir Island (Kuril Islands, Russia)

et al. 2014

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Section: Discussionmentioning

confidence: 99%

Soil macrofauna of the south of Kunashir Island (Kuril Islands, Russia)

et al. 2014

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“…Judging from the distribution and ages of popula tions of the ninth lineage, E. n. nordenskioldi has sur vived in situ several cycles of cooling-warming and the related landscape changes due to an extremely wide ecological valence with respect to temperature and humidity [15]. Our preliminary results suggest that examination of the range of E. n. nordenskioldi, espe cially northern areas, using a finer grade would facili tate the search for haplotyopes of the ninth lineage.…”

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confidence: 81%

Phylogeography of the earthworm Eisenia nordenskioldi nordenskioldi (Lumbricidae, Oligochaeta) in northeastern Eurasia

2015

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Determining factors for cryoprotectant accumulation in the freeze‐tolerant earthworm, Dendrobaena octaedra

Overgaard¹,

Slotsbo

Holmstrup³

et al. 2007

J. Exp. Zool.

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The freeze-tolerant earthworm Dendrobaena octaedra is found in most of the European forest and tundra, Siberia, North America and Greenland where it over-winters in the top soil and encounters winter frost. In response to freezing this earthworm rapidly synthesises glucose which acts as a cryoprotectant. Frost tolerance varies extensively between geographical populations, and of the populations studied so far, the Finnish worms are most and the Danish worms least frost tolerant. Little is known about the determining factors for glucose synthesis and this study therefore investigated possible roles of acclimation and the cues for synthesis of glucose, in Finnish and Danish worms. The Finnish population had significantly larger glycogen reserves than the Danish during acclimation and in all worms, glucose synthesis was the result of an almost stoichemical reduction in glycogen stores. Maximum glucose levels were reached after the onset of freezing and were significantly higher in Finnish worms where the sugar accounted for as much as 5% of the fresh weight. On average, both the total glycogen phosphorylase activity and the active enzyme pool increased during acclimation in the Finnish but not the Danish populations. However, the increase in this enzyme was only significant during the freezing process. In this study, we show contrary to previous theory that glucose synthesis is initiated before the onset of freezing and that in this species, cryoprotectant synthesis is sensitive to very small temperature changes below 0 degrees C without the presence of ice.

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Cited by 17 publications

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Soil macrofauna of the south of Kunashir Island (Kuril Islands, Russia)

Soil macrofauna of the south of Kunashir Island (Kuril Islands, Russia)

Phylogeography of the earthworm Eisenia nordenskioldi nordenskioldi (Lumbricidae, Oligochaeta) in northeastern Eurasia

Determining factors for cryoprotectant accumulation in the freeze‐tolerant earthworm, Dendrobaena octaedra

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