Pits, mounds, and vernal ponds in a Tasmanian subalpine grassland
| Autor: | James B. Kirkpatrick, Violet Harrison-Day |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
geography
geography.geographical_feature_category biology Landform Ecology 05 social sciences Geography Planning and Development Common wombat 0211 other engineering and technologies 0507 social and economic geography 021107 urban & regional planning Edaphic 02 engineering and technology biology.organism_classification Old-growth forest Grassland Tussock grassland Pit-and-mound topography 050703 geography Temperate rainforest Geology Earth-Surface Processes |
| Zdroj: | Geographical Research. 57:230-237 |
| ISSN: | 1745-5871 1745-5863 |
| DOI: | 10.1111/1745-5871.12328 |
| Popis: | Falling trees commonly turbate soils in primary forest, creating characteristic edaphic patterns related to pit and mound topography. Vernal ponds with associated mounds were observed in mineral soils on a treeless plain in subalpine Tasmania, Australia. The hypothesis that paired ponds and mounds on the plain originated as pit and mound features in forests that were later destroyed by fire was tested by comparing the soils and landforms caused by recent tree falls in adjacent forest with those on the plain. The soil characteristics, orientations, and dimensions of the ponds and mounds were consistent with a tree fall origin, although rare secondary ponds on the tops of mounds may derive from the burrowing activities of the medium‐sized marsupial, Vombatus ursinus (common wombat). The characteristics of pond and mound soils suggested that most were hundreds to thousands of years old, with the ponds persisting because of differences in deflation, deposition, and organic matter formation between themselves and adjacent persistently dry land. |
| Databáze: | OpenAIRE |
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