Project groups

7-2.5 | DEVELOPMENT OF THE SPECIES COMBINATION OF SELECTED VEGETATION TYPES OVER THE LAST THREE DECADES WITH PARTICULAR ATTENTION TO TEMPERATURE INDICATOR VALUES (2008-2011)

Twenty-five (and in some cases up to thirty-five) years ago the species combination of selected vegetation types were documented on a large-scale basis and detailed for numerous species’ inventories. Within the framework of this project these inventories will be re-recorded again. The vegetation types chosen were:

o The Milio-Fagetum of the Westphalian Bight,

o hedges of the Westphalian Bight, and

o the village vegetation of Westphalia.

In 1974 and 1975 Burrichter & Wittig documented the species combination of the Milio-Fagetum of the Westphalian Bight (Burrichter & Wittig 1977). During a later re-survey the significance of the increasing acidification indicators and, in the case of some subsections of the areas investigated, also nitrogen indicators were stated (Wittig et al. 1985). As other (unpublished) re-surveys have shown, this increase was more marked in subsequent years. An analysis of the potential increase in thermophilous species has not been carried up to date but is planned within the context of a further re-survey to be carried out in 2009. The results gain importance if possible changes in the soil chemism are also considered. During the first re-survey a detailed inventory of the soil chemism and soil physics was documented (Werner & Wittig 1986). Therefore, this repeat survey will also include a re-analysis of the soils.

Between 1973 and 1976 the hedge vegetation of the Westphalian Bight was documented by Wittig (1976). Hedges, as isolated linear landscape elements, are far more exposed to climatic influences than forests, which create a certain local climate. Therefore one can expect hedges to be good indicators of climate conditions.

The vegetation of Westphalian villages was documented in the years 1983 to 1985 (Wittig & Wittig 1986). In habitats that are frequently disturbed, new species can establish more easily than in undisturbed areas. Village vegetation is therefore considered to be an appropriate research subject with respect to climate change.

Publications

Eycott, A.E., Stewart, G.B., Buyung-Ali, L.M., Bowler, D.E., Watts, K. & A.S. Pullin (2012) : A meta-analysis on the impact of different matrix structures on species movement rates. - Landscape Ecology 27: 1263-1278.

Huwer, A. & R. Wittig (2012) : Low impact of climate change on species composition of a central European lowland beech forest community. - Phytocoenologia 42: 57-65.

Wittig, R. & A. Huwer (2012) : Changes in the species composition of hedgerows in the Westphalian Basin over a thirty-five-year period. - Tuexenia 32: 31-53.

Wittig, R. : Hecken: Ökosystemservices, Ökosystemfunktionen und Biodiversität. - Berichte der Reinhold-Tüxen-Gesellschaft (RTG) 2009, Band 21: 73-89.

Wittig, R. & U. Becker (2010) : The spontaneous flora around street trees in cities—A striking example for the worldwide homogenization of the flora of urban habitats. Flora 205: 704-709.

Wittig, R., Becker, U. & S. Nawrath (2010) : Grassland loss in the vicinity of a highly prospering metropolitan area from 1867/68 to 2000 —The example of the Taunus (Hesse, Germany) and its Vorland.- Landscape Urban Planning 95: 175-180.