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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ammer, Sabine Ammer, Christian |
| Copyright Year | 1998 |
| Abstract | The earthworm fauna was recorded from a former open clay pit five and seven years after the area had been recultivated with various tree species. The highest abundances (200–245 specimens/m2) and biomasses (46.8 to 48.4 g/m2) were found in the following stand types: mixed woodland of balsam poplar (various sorts) and grey alder (Alnus incana (L.)Moench), mixed woodland of balsam poplar (Andoscoggin) and black alder (Alnus glutinosa (L.)Gaertn.), and a pure stand of black alder. Clearly lower values were found in a plot with common oaks (Quercus robur L.) under a dense shelterwood of naturally regenerated willows (Salix spec.), and a plot exclusively stocked with naturally regenerated willows. The rapid resettlement of the backfilled, compacted clay soil is above all explained by the high pH-values found in the surface soil. The differences between the studied plots regarding total abundance and biomass might be explained by the different qualities and amounts of litter. The highest species diversity — expressed by the Shannon-index — and the highest proportion of endogeic species, particularlyAporrectodea caliginosa Savigny 1826, were calculated for the two stands with a mixture of alder and balsam poplar. This result could have been caused by the lack of parent soil bed and the particularly high pH-value of the soils found there.Auf einer ehemaligen Tonerdeabbaufläche bei Landshut im Wald der Universität München wurde fünf bzw. sieben Jahre nach der Rekultivierung mit verschiedenen Baumarten die Regenwurmfauna erfaßt. Die höchsten Abundanzen (200–245 Individuen/m2) und Biomassen (46,8–48,4 g/m2) wurden unter folgenden Bestandestypen festgestellt: einem Mischbestand aus Balsampappel (verschiedene Sorten) und Grauerle (Alnus incana (L.)Moench), einem Mischbestand aus Balsampappel (Andoscoggin) und Schwarzerle (Alnus glutinosa (L.)Gaertn.) sowie einem Schwarzerlenreinbestand. Deutlich geringere Werte fanden sich auf einer Parzelle mit Stieleichen (Quercus robur L.) unter einem dichten Schirm natürlich angekommener Weiden (Salix spec.) und einer ausschließlich von natürlich verjüngten Weiden bestockten Parzelle. Die Regenwurmpopulationen auf den Versuchsparzellen bestanden — in wechselnden Anteilen — aus folgenden Arten:Aporrectodea caliginosa Savigny 1826,Aporrectodea rosea Savigny 1826,Lumbricus rubellus Hoffmeister 1843,Dendrobaena octaedra Savigny 1826 undOctolasion lacteum Örley 1885. Auf allen Versuchsparzellen herrschten juvenile Individuen vor. Die größte Artendiversität, ausgedrückt durch den Shannon-Index, und die höchsten Anteile der endogäisch, d. h. ständig im Mineralboden lebenden Arten der GattungApporectodea errechneten sich für die mit Erlen-Balsampappel-Mischbeständen bestockten Parzellen. Dieser Befund könnte eine Folge des dort fehlenden Mutterbodenauftrags und des besonders hohen pH-Wertes sein. Keine wesentlichen Unterschiede zwischen den Parzellen ließen sich dagegen hinsichtlich des Auftretens der als intermediär geltende ArtL. rubellus feststellen. Diese die Gesamtbiomasse aller Parzellen dominierende Art hält sich vorzugsweise, jedoch nicht ausschließlich in der Streuschicht auf. Konkurrenzeffekte zwischen den dominanten GattungenLumbricus undApporectodea, d. h. das Vorkommen der einen Gattung vor allem dort wo die andere fehlt, lassen sich aus den vorliegenden Daten nicht ableiten. Die rasche Wiederbesiedelung des wiederverfüllten, verdichteten Tonbodens mit Regenwürmern wird vor allem auf die hohen pH-Werte des Oberbodens zurückgeführt. Die Unterschiede zwischen den Versuchsgliedern hinsichtlich Gesamtabundanz und -biomasse erklären sich vermutlich durch die unterschiedliche Streuqualität und -menge. Besonders die von den beiden Erlenarten gelieferte Streu scheint sich auf die Entwicklung einer leistungsfähigen Regenwurmpolulation positiv ausgewirkt zu haben. |
| Starting Page | 167 |
| Ending Page | 175 |
| Page Count | 9 |
| File Format | |
| ISSN | 00158003 |
| Journal | Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch |
| Volume Number | 117 |
| Issue Number | 1-6 |
| e-ISSN | 14390337 |
| Language | German |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 1998-12-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Regenwurmpopulationen Rekultivierung Tonabbau Erle Basenreichtum Forestry Plant Sciences Plant Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Forestry |
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