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Sorbus badensis 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Rosales Rosaceae

Scientific Name: Sorbus badensis Düll
Taxonomic Source(s): Meyer, N., Meierott, L., schuwerk, H. and Angerer, O. 2005. Beiträge zur Gattung Sorbus in Bayern.
Taxonomic Notes: This is an apomictic species of the S. latifolia L. complex, originating from a cross between S. graeca (Spach) Lodd. ex Schauer and S. torminalis (L.) Crantz.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D1 ver 3.1
Year Published: 2017
Date Assessed: 2016-05-11
Assessor(s): Meyer, N., Beech, E. & Rivers, M.C.
Reviewer(s): Salvesen, P.H. & Allen, D.J.
Justification:
Sorbus badensis is a small tree found only in states of Bavaria and Baden-Württemberg in southern Germany. It also has a restricted extent of occurrence of less than 1,000 km2, however whilst the species is being threatened by natural succession which is causing a decline in habitat quality, there is no precise estimate of locations for this species. It is here assessed as Vulnerable (D1) as it only has c.800 mature individuals. It is being utilised as a compensation measure and for that purpose only propagated by local botanic garden.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to the states of Bavaria and Baden-Württemberg in southern Germany, where it occurs between 270 and 360 m asl (N. Meyer pers. comm. 2016). Between Bavaria and the type location in Baden-Württemberg, Sorbus badensis has an estimated extent of occurrence (EOO) of nearly 1,000 km2.
Countries occurrence:
Native:
Germany
Additional data:
Continuing decline in extent of occurrence (EOO):No
Number of Locations:11-15
Lower elevation limit (metres):270
Upper elevation limit (metres):360
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population is found in 175 localities. The population is about 2,200 individual, with c.800 known mature individuals (N. Meyer pers. comm. 2016). Many localities consist of single trees, with a few localities with more than 100 individuals.
Current Population Trend:Unknown
Additional data:
Number of mature individuals:800Continuing decline of mature individuals:Unknown
Extreme fluctuations:UnknownPopulation severely fragmented:No
Extreme fluctuations in subpopulations:Unknown

Habitat and Ecology [top]

Habitat and Ecology:This species grows as a tree up to 6 m tall. It grows in open pine forest, on the edges of deciduous forests as well as in old vineyards (N. Meyer pers. comm. 2016). It can also be found in quarries and at edges of meadows and forest margins.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: The species is now used by the local botanic garden for producing native endemics for use in reforestation in nature protection.

Threats [top]

Major Threat(s): Sorbus species in southern Germany are threatened by forest management changes. The species did well where land was previously deforested or coppiced, providing perfect light conditions for Sorbus to flourish, and pine forests planted that also allowed light to the forest floor. However, these forests are now being left to natural succession, leading to closed canopies, restricting Sorbus to forest edges and rocky areas (N. Meyer pers. comm. 2016).

Conservation Actions [top]

Conservation Actions: Sorbus badensis is reported as found in two ex situ collections (BGCI 2016). This species was assessed as 3 E!!a in the Rote Liste der gefährdeten Gefäßpflanzen Bayerns (Scheuerer and Berg 2003). The species is being propagated by the local botanic garden for use in compensation scheme to offset land destruction from development. Habitat management is needed to ensure habitat quality in the long term.

Citation: Meyer, N., Beech, E. & Rivers, M.C. 2017. Sorbus badensis. The IUCN Red List of Threatened Species 2017: e.T34734A83023865. . Downloaded on 23 September 2017.
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