Watering private property wetlands in the Murray Valley, New South Wales

Nias, Deborah; Alexander, Patricia; Herring, Matthew

doi:10.1046/j.1442-8903.2003.00129.x

Cited by 19 publications

(11 citation statements)

References 1 publication

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“…Increased representation of exotic flora in soil seed banks may alter the composition of regenerating plant communities following floods. Recent studies that assess seed banks of degraded floodplain wetlands in Australia to determine their contribution to wetland rehabilitation (Casanova and Brock 2000;Nias et al 2003;Nicol et al 2003;Robertson and James 2007;Williams et al 2008) collectively report establishment of exotic species during dry phases of the flooding cycle. An appropriately timed flood of sufficient depth and duration may eliminate the ability of exotic annuals to germinate and/or establish.…”

Section: Discussionmentioning

confidence: 97%

Alterations in flood frequency increase exotic and native species richness of understorey vegetation in a temperate floodplain eucalypt forest

2010

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The delivery of environmental flows for biodiversity benefits within regulated river systems can potentially contribute to exotic weed spread. This study explores whether exotic plants of a floodplain forest in Victoria, Australia, are characterised by specific functional groups and associated plant traits linked to altering hydrological conditions over time. Permanently marked 20 9 20 m 2 plots from five wetland sites in Eucalyptus camaldulensis floodplain forest were sampled twice, first in the early 1990s (1993)(1994) and then 15 years later (2007)(2008). Species cover abundance data for understorey vegetation communities were segregated by season and analysed using ordination analysis. Exotic species richness was modelled as a function of site flooding history and native species richness using general linear models. Site ordinations by detrended correspondence analysis showed differential community compositions between survey dates, but native and exotic species were not clearly differentiated in terms of DCA1 scores. Most exotics belonged to functional groups containing annual species that germinate and reproduce under drier conditions. Exotics reproducing under wetter conditions were in the minority, predominantly perennial and capable of both sexual and asexual reproduction. Site flooding history and native species richness significantly predicted exotic species richness. Vegetation changes are partially structured by reduced flood frequency favouring increased abundance of exotic, sexually reproducing annuals at drier sites. Sites of low flood frequency are more sensitive to future exotic weed invasion and will require targeted management effort. Flow restoration is predicted to benefit propagule dispersal of species adopting dual regeneration strategies, which are predominantly natives in this system.

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Section: Discussionmentioning

confidence: 97%

Alterations in flood frequency increase exotic and native species richness of understorey vegetation in a temperate floodplain eucalypt forest

2010

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“…In the present study, we have shown inundation leads to considerable nutrient pulses that promote phytoplankton and microcrustacean communities. These are likely to provide both short‐ and long‐term benefits that may explain the positive responses of higher trophic groups (Nias et al. 2003; Alexander et al.…”

Section: Discussionmentioning

confidence: 99%

“…However, with the ongoing water issues faced in Australia, the inundation of these wetlands can for some be an unattainable luxury. In 2001, the New South Wales Murray Wetlands Working Group (NSW MWWG) instigated a project to inundate privately owned wetlands in southern New South Wales (Nias et al. 2003).…”

Section: Introductionmentioning

confidence: 99%

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Water quality, nutrient, phytoplankton and microcrustacean responses to watering of private wetlands in the Murray Valley, New South Wales

Zukowski¹,

Whiterod²

2009

Eco Management Restoration

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“…This is valuable information for natural resource managers and can be used provide a basis for wetland conservation through the use of environmental water allocations. Nias et al (2003) described a number if instances in New South Wales, Australia where environmental water allocations were distributed to wetlands on private properties, many of which were dry and degraded prior to inundation. Native wetland vegetation returned significantly to most of these private wetlands demonstrating the presence of a resilient seed bank.…”

Section: Use Of Soil Seed Bank Investigations In Floodplain Wetland Rmentioning

confidence: 99%

Plant Establishment from the Seed Bank of a Degraded Floodplain Wetland: A Comparison of Two Alternative Management Scenarios

Robertson

James

2006

Plant Ecol

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There has been little research examining the soil seed banks of degraded floodplain wetlands and their contribution to wetland rehabilitation in Australia. Our aim was to assess the establishment of plants from the seed bank that may occur following the delivery of an environmental water allocation to Kanyapella Basin, a 2950 ha wetland located on the floodplain of the Goulburn and Murray Rivers in northern Victoria, Australia. Two hypothetical water regimes were investigated (flooded and dry) in a glasshouse experiment, where plants were left to establish from the seed bank over a period of 124 days. Differences in the establishment of plants from the seed bank indicated that the return of a flooding regime is likely to have a significant effect on the composition of the wetland vegetation. Mapping of the distribution of plant species indicated that propagules were highly dispersed across the wetland for the majority of taxa, in contrast to the localised distribution of many of the plant species represented in the extant vegetation. Inundation favoured the establishment of native wetland and floodplain plants, although many areas of Kanyapella Basin that are currently 'weed-free' have the potential to become colonised and potentially dominated by introduced plants if the wetland is not managed appropriately. Overall, results supported the aim of management to reestablish a wetting and drying regime through use of an environmental water allocation. This study presents a significant example of the application of seed bank investigations in wetland ecology and management.

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Watering private property wetlands in the Murray Valley, New South Wales

Cited by 19 publications

References 1 publication

Alterations in flood frequency increase exotic and native species richness of understorey vegetation in a temperate floodplain eucalypt forest

Alterations in flood frequency increase exotic and native species richness of understorey vegetation in a temperate floodplain eucalypt forest

Water quality, nutrient, phytoplankton and microcrustacean responses to watering of private wetlands in the Murray Valley, New South Wales

Plant Establishment from the Seed Bank of a Degraded Floodplain Wetland: A Comparison of Two Alternative Management Scenarios

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