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Berlin Environmental Atlas

01.12 Soil Functions (Edition 2006)

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01.12.5 Archival Function for Natural History

Description

Since soil types develop in dependence on the respective environmental conditions (rock, climate, time), soils can reflect the landscape-historical conditions of their time of origin in their profile features, if their structure has not been anthropogenically destroyed. These soils are thus of fundamental significance as an archive or informational source of landscape history. For the Berlin area, the soils are the archive for the Ice-Age conditions of the creation of the landscape, and the postglacial bog-mire formations. The archival function is derived from the peculiarity of the natural space of the section, such as dead-ice kettles, push moraines and the regional rareness of soil associations. Very rare and geomorphologically exceptional soils receive the highest evaluation.

The goal is to emphasize particularly those soil associations and soil qualities which characterize the Berlin natural area in a special and unmistakable manner, or which are of special significance due to the rareness of their occurrence or their qualities. These soils should be preserved and protected to a special degree.

Methodology

The evaluated Regional Rareness of the Soil Association was one factor used for the evaluation of the archival function for natural history, whereby soil associations with an area share of less than 0.4% of the city area, not counting bodies of water, were classed as Level 2 (very rare - rare), and all others were classed as Level 1 (medium - very frequent) (cf. Map 01.11.1). ). An additional criterion for inclusion of soil associations was Special Features of the Natural Space (Level 1), due to their geomorphological conditions (cf. Map 01.11.2). For the evaluation of the archival function, both evaluations were added. Those soils with an individual evaluation of 3 were considered to have a high archival function, those with 2, a medium function, and those with 1, (Lahmeyer 2000).

Diagram for the evaluation of the archival function for natural history
Fig. 1: Diagram for the evaluation of the archival function for natural history

Map Description

The Berlin area has only a few sites of special significance for natural history. They are confined to the near-natural soils, largely located in the outlying areas of the city.

Lime-mud areas, bog associations and histo-humic gleysols in flood plains and dead-ice kettles as well as calcic gleysols, dystric gleysols and calcaro-dystric histosols on the push and end-moraines have a special significance. In addition, there are still-existing arenic dystric cambisols and gley arenic dystric cambisols on the boulder marl plateaus in Gatow and Frohnau.

The other bog and groundwater soils of glacial-stream channels, depressions, and some valley-sand sections receive a medium evaluation. In addition, there are podzolized soils of dune landscapes, dystric-cambisol associations on moraine hills and on end and push moraines. On the plateaus, arenic dystric cambisols and gley arenic dystric cambisols in the boulder marl deserve particular mention.

The remaining soil associations, largely strongly anthropogenically changed, or soils from aggradation, have only a minor significance as an archive for natural history.

Area shares of the archival function for the natural history per use class (incl. impervious sections without streets and waters, not all uses, are represented)
Fig. 2: Area shares of the archival function for the natural history per use class (incl. impervious sections without streets and waters, not all uses, are represented)

Excel
[Statistical base of Figure 2 is also available as Excel-File (MS-Excel is required).]

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