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https://hdl.handle.net/1959.11/8078
Title: | Palaeolimnological evidence for submerged plant loss in a floodplain lake associated with accelerated catchment soil erosion (Murray River, Australia) | Contributor(s): | Reid, Michael (author) ; Sayer, C D (author); Kershaw, A P (author); Heijnis, H (author) | Publication Date: | 2007 | DOI: | 10.1007/s10933-006-9067-9 | Handle Link: | https://hdl.handle.net/1959.11/8078 | Abstract: | Shallow lakes have been described as existing in two alternative equilibrium states, dominated by either submerged plants or phytoplankton. Causes of, often catastrophic, shifts between these states have been widely debated but may often result from displacement of the dominant community by stochastic influence. In Australian cut-off river meanders (also known as 'billabongs'), anecdotal and palaeolimnological evidence suggests widespread loss of aquatic macrophytes since European occupation of the region c. post-1800. Our detailed and high-resolution stratigraphic study of a sediment core from Hogan's Billabong (Murray River, Australia) seeks to identify the causes of the loss of aquatic macrophytes. Little direct evidence of the past extent and composition of submerged macrophyte communities was recovered. Nevertheless, results derived from other sediment proxies, including declines in the abundance of epiphytic diatoms and in plant-associated invertebrates, provide further indirect evidence of macrophyte disappearance. Despite limitations with radiometric dating, the sequence of events in the derived record suggests that a period of high abiotic turbidity, leading to a critical reduction in water transparency and caused by widespread erosion during the late 19th century, is the most likely factor contributing to loss of submerged vegetation from this billabong. | Publication Type: | Journal Article | Source of Publication: | Journal of Paleolimnology, 38(2), p. 191-208 | Publisher: | Springer Netherlands | Place of Publication: | Netherlands | ISSN: | 1573-0417 0921-2728 |
Fields of Research (FoR) 2008: | 040601 Geomorphology and Regolith and Landscape Evolution | Socio-Economic Objective (SEO) 2008: | 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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