Читать книгу Biogeography in the Sub-Arctic - Группа авторов - Страница 63

In addition to interglacial deposits, glacial and non‐glacial deposits that are referred to marine isotope stages 5d to 5a are also found along the coast of Jameson Land in East Greenland (Funder et al. 1998). The Hugin Sø Interstadial, which is correlated with marine isotope stade 5c, represents an ice‐free period during the early part of the Weichselian. The vegetation appears to have consisted of herbs and bryophytes only. Remains of S. oppositifolia are common, and seeds of Papaver sect. Scapiflora also occur (Bennike and Böcher 1994). These species are found all over Greenland, but play an increasingly larger role towards the north, and none of them have been found in deposits from the last interglacial. The only beetle species found is A. alpina, one of the most cold‐adapted ground beetles on Earth. It has been proposed that the mean temperature for the warmest month of the year was 3–4 °C lower than at present (Bennike and Böcher 1994), which is in accordance with the marine mollusc fauna that shows similarities to modern faunas from North Greenland (Funder et al. 1998). In contrast, the fossil bryophyte flora from the Hugin Sø Interstadial comprises several warmth‐demanding species such as Amphidium mougeotii and Polytrichastrum longisetum, which indicate a slightly warmer climate than at present (Hedenäs 1994). However, it is possible that some of the bryophyte material is reworked from Eemian deposits.