Triturus cristatus
Great Crested Newt Triturus cristatus (Laurenti 1768) Distribution (Figure 3). Included records from Artportalen (N=320): due to risk of confusion with the more widespread Lissotriton vulgaris only records documented by a photograph or made by experienced observers have been included. Widely distrib...
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| Format: | Other/Unknown Material |
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Zenodo
2023
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| Online Access: | https://doi.org/10.5281/zenodo.8040597 http://treatment.plazi.org/id/03BE87CBFF8A4A6AB8887B86400FF9AC |
| Summary: | Great Crested Newt Triturus cristatus (Laurenti 1768) Distribution (Figure 3). Included records from Artportalen (N=320): due to risk of confusion with the more widespread Lissotriton vulgaris only records documented by a photograph or made by experienced observers have been included. Widely distributed in the Southern Boreal; in a regular sampling grid covering the entire provinces of Gästrikland and Hälsingland, Sterner (2005) found the species in 21% of 111 squares in which randomly selected wetlands (<1 hectare, presumed free from predatory fish) were investigated. It is more evenly distributed in Gästrikland than in Hälsingland, and in both provinces there is a clear pattern of more numerous occurrence in areas near the coast. In a similar randomized survey of Medelpad and southern Ångermanland, Olofsson et al. (2008) recorded the species in 3% of 155 randomly selected small wetlands. In coastal southern Medelpad the occurrence is more or less continuous (Aronsson et al. 2005), as it is in coastal Hälsingland and Gästrikland. In the Middle Boreal there are scattered records north to 63 oN, most of which from east-central Jämtland. A recent photo-documented record in NE Ångermanland suggests that the species may range further north along the coast than currently known. The only record from the Northern Boreal during the study period is a possibly disjunct occurrence in western Jämtland (Figure 3). Although most known extant breeding sites are in coastal lowland, at least three are at 300–400 m altitude (Elmberg 1995; Olofsson et al. 2008). An extinct population at Långselberget (Lycksele lappmark (Middle Boreal)) was even higher, at 460 m. Offshore occurrence is known from only one site in North Sweden (Kråkön, Hälsingland). However, several breeding wetlands on the mainland are very near the sea (Sterner 2005; Olofsson et al. 2008). This indicates a fair general dispersal capacity, since such wetlands, created by land uplift, are often less than 200 years old. One local extinction has been documented in ... |
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