Riparian Beetles, a Unique, but Vulnerable Element in the Fauna of Fennoscandia
Authors: Andersen, Johan; Hanssen, Oddvar
Source: Biodiversity and Conservation, Volume 14, Number 14, December 2005 , pp. 3497-3524(28)
Abstract:A survey of the distribution and ecology of riparian beetles in Fennoscandia and adjacent countries is presented and the conservation value of, and threats to, the element are discussed. Contrary to most other taxa or ecological groups, the number of riparian species increases from south to north in Scandinavia. The inner parts of the counties of Sør-Trøndelag (STI) in Central Norway and Troms (TRI) in North Norway have the largest total number of riparian species, the largest number of vulnerable (red-listed) riparian species, and the largest importance index, rarity factor and algorithmic ranking in Fennoscandia. These provinces may be regarded as hot spots for riparian species in northwestern Europe and therefore have high conservation value. In addition to river regulation, river banks are exposed to a number of impacts such as removal of sediment and fluvial woodlands, wear and tear, construction of flood-prevention walls, canalization and various other developments (road building, industrial activity, etc.). These impacts seem to be more severe in Norway than in Northern Sweden and Finland. Due to human impacts, riparian carabid beetles have become extinct in parts of their former range in Scandinavia. The possibility of re-invasion of species after restoration is discussed.
Document Type: Research Article
Publication date: 2005-12-01