Report: ‘Ecological analysis: Leybucht (1983)»
Description
The work “Landscape Ecological Analysis of the Leybucht” presented here serves as a decision-making aid for nature conservation activities in connection with structural interventions in the area of Leybucht, which are necessary for reasons of coastal protection, inland drainage and maritime transport from the port of Greetsiel to the deep water of the Ems. It owes its creation to an expert report commissioned by the Construction Office for Coastal Protection, North, which at the time was concerned with the corresponding structural planning. Even during the preparation of the report, its printing was considered. The main reasons for this were the following considerations:
1. The study covers not only individual but all biological aspects and is therefore probably the first overall representation of ecological relationships of the Leybucht habitat.
2. An objectification of the discussion about structural interventions in the area of the Leybucht can only be brought about by broad scattering of scientifically proven foundations.
The current Leybucht represents the remainder of a large burglary bay, the largest extension of which is said to have existed in the 14th century. Early recovery work began, which came to a provisional end with the completion of the Störtebeker dike in 1950 and the summer cover of the Hauener Hooge in 1958. Studies conducted by the Norderney Research Centre by MÜLLER (1960), LUCK (1965) and Homeier (1969) have shown that the remaining Leybucht is subject to a strong landing process, which leads to considerable problems in connection with shifts and shrinking of external depths. As early as 1960, MÜLLER came to the conclusion that a copying of the Leybucht was the only correct solution. With the increasing environmental awareness of the 1970s, as it grew mainly from the knowledge of the numerous already destroyed natural habitats, the Leybucht also gained increasing importance as a still largely intact habitat. After MÜLLER had already carried out a processing of the watt fauna in 1960, the Lower Saxony State Administration Office – Nature Conservation, Landscape Care, Bird Protection – issued a comprehensive survey of landscape conservation for the first time in 1978, with particular regard to the avifauna and flora (DAHL and HECKENROTH 1970). The aim of the study was a comprehensive characterisation and evaluation of the affected habitat from the point of view of ecological nature conservation. [...]
The following conditions are crucial for the preservation of the presented state and the further development of the Leybucht ecosystem:
1. Unrestricted effect of the tides in the rhythms necessary for the existing biological character of the biotope complexes watts, lighter areas and summer polders.
2. Maintaining the particularly favourable ratio for the stability of this ecosystem between large nuclear zones without influences other than biotopes (e.g. visual and acoustic disturbances) and relatively small, more disturbed margins.
3. Avoiding land loss, especially on the salt turf.
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Tags
- leybucht
- makrozoobenthos-makrofauna-avifauna-artenzusammensetzung-nlwkn-fischfauna-ökologische-analyse