Woody plant restoration and natural regeneration in wet meadow at Coomonderry Swamp on the south coast of New South Wales

2000 ◽  
Vol 51 (1) ◽  
pp. 81 ◽  
Author(s):  
N. H. de Jong
Keyword(s):  
Natural Regeneration ◽  
New South ◽  
Woody Species ◽  
Cost Effective ◽  
Wet Meadow ◽  
Casuarina Glauca ◽  
South Wales ◽  
Plant Restoration ◽  
Inhibited Acid ◽  
Sulfate Soils

This study investigated planting techniques and natural regeneration of indigenous woody species within degraded wet meadow wetland at Coomonderry Swamp. Planting tubestock directly into existing vegetation was practical and cost-effective. Clearing of plots allowed infiltration of weeds, early growth of tubestock was inhibited, acid sulfate soils were exposed, and open inundated plots were choked by algae. After four years, Melaleuca ericifolia and Melaleuca linariifolia showed good survivorship at upper and lower elevations. Eucalyptus robusta and Casuarina glauca were more successful at upper elevations, and Leptospermum juniperinum did not succeed at either elevation. These results corresponded to patterns of regeneration and to distributions within undisturbed stands. Despite the evidence of natural regeneration, direct seeding was not successful at the experimental site. Given that poor dispersal was indicated at Coomonderry Swamp, it is unlikely that isolated wetlands in the region could rely solely on seed dispersal for woody revegetation. Even where regeneration can occur naturally, some planting or culling might be required if the desired outcome is a species mix comparable to that observed on undisturbed margins.

scholarly journals Acid sulfate soils and acid drainage, Lower Shoalhaven floodplain, New South Wales

2010 ◽  
Vol 16 (2) ◽  
pp. 56 ◽  
Author(s):  
M I Pease ◽  
A G Nethery ◽  
A R. M Young
Keyword(s):  
New South ◽  
New South Wales ◽  
Acid Sulfate Soils ◽  
Acid Sulfate ◽  
Acid Drainage ◽  
South Wales ◽  
Sulfate Soils

Establishing surface-sown pastures in a Poa labillardieri-Themeda australis association

1986 ◽  
Vol 26 (3) ◽  
pp. 331 ◽  
Author(s):  
MH Campbell ◽  
MJ Keys ◽  
RD Murison ◽  
JJ Dellow
Keyword(s):  
Festuca Arundinacea ◽  
New South ◽  
New South Wales ◽  
Ground Cover ◽  
Cost Effective ◽  
Phalaris Aquatica ◽  
South Wales ◽  
Before And After

The effects of time and rate of application of glyphosate, 2,2-DPA and tetrapion on Poa labillardieri and Themeda australis were measured in seven experiments carried out 55 km south of Braidwood, on the southern tablelands of New South Wales between 1980 and 1982. In an eighth experiment (1981) and in a 35-ha demonstration (1983), at the same site, the effects of applying herbicides (before and after the autumn break) and surface-sowing Phalaris aquatica, Festuca arundinacea and Trifiolium repens with fertiliser on the control of P. labillardieri were ascertained. All three herbicides proved effective in reducing the ground cover of P. labillardieri from applications at any time of the year. For T. australis, tetrapion proved effective when applied at any time of the year, while glyphosate and 2,2-DPA were effective in all seasons except winter. Glyphosate at rates between 0.72 and 1.44 kg/ha a.i. was more cost effective than 2,2-DPA (11.1 kg/ha a.i.) and tetrapion (3.75 kg/ha a.i.). Best establishment and development of sown grasses and legumes was attained by applying herbicides after the autumn break but before heavy frosts, and then surface-sowing 1-3 months later. Control of P. labillardieri was best where P. aquatica and F. arundinacea established most densely.

The feasibility of applying a cost-effective approach for assigning priorities for threatened species recovery with a case study from New South Wales, Australia

2009 ◽  
Vol 15 (4) ◽  
pp. 238 ◽  
Author(s):  
Judit K. Szabo ◽  
Sue V. Briggs ◽  
Rachel Lonie ◽  
Linda Bell ◽  
Richard Maloney ◽  
...  
Keyword(s):  
Threatened Species ◽  
New South ◽  
New South Wales ◽  
Cost Effective ◽  
Limited Time ◽  
Biodiversity Management ◽  
South Wales ◽  
Cost Effective Approach ◽  
Key Terms

May (2002) estimated that the current rate of extinction of species globally is 100?1000 times background rates. Hence a primary goal of biodiversity management is to bring the rate of extinction back to normal levels. Conservation managers face two interrelated problems: limited time and money, and how to allocate the finite available resources (Bottrill et al. 2008, 2009). In this paper we tackle the second of these problems. Definitions of key terms are in Appendix 1.

Study of Aerodynamic Forces on a Rotating Wind Driven Ventilator

2003 ◽  
Vol 27 (1) ◽  
pp. 63-72 ◽  
Author(s):  
D. M. H. Rashid ◽  
N. A. Ahmed
Keyword(s):  
New South ◽  
Cost Effective ◽  
Working Environment ◽  
Complex Flow ◽  
Number Range ◽  
South Wales ◽  
Future Improvement ◽  
Flow Features ◽  
Spinning Cylinder ◽  
The University

A wind driven ventilator is a simple, cost-effective and environmentally-friendly device that can improve comfort and the working environment. Unfortunately very little is known about the complex flow field associated with the operation of this device. A wind tunnel investigation of the flow associated with a rotating wind ventilator was, therefore, carried out at the aerodynamic laboratory of the University of New South Wales within the Reynolds number range of 1.1 times 105 to 5.5 times 105. An attempt was also made to study some of the important features associated with operation of a rotating wind ventilator using a simple model of a stationary and a spinning cylinder. The results were encouraging and several flow features were identified for future improvement in the performance of a wind ventilator.

Implementation of a Momentum Method for Total Drag Determination for Undergraduate Students

2002 ◽  
Vol 30 (4) ◽  
pp. 315-324 ◽  
Author(s):  
N. A. Ahmed
Keyword(s):  
Theoretical Analysis ◽  
Undergraduate Students ◽  
New South ◽  
New South Wales ◽  
Cost Effective ◽  
Total Drag ◽  
South Wales ◽  
The University ◽  
Aerodynamic Investigation

In aerodynamics, progress has often been made through many inspired approaches to address practical problems. The commonly called momentum method for total drag determination is one such example. In this method, theoretical analysis and experimentation has been combined to produce a powerful tool for efficient and cost-effective aerodynamic investigation of total drag. A detailed description of the implementation of this technique for undergraduate students at the University of New South Wales is provided in this paper.

scholarly journals Beach safety: can drones provide a platform for sighting sharks?

2019 ◽  
Vol 46 (8) ◽  
pp. 701 ◽  
Author(s):  
Paul A. Butcher ◽  
Toby P. Piddocke ◽  
Andrew P. Colefax ◽  
Brent Hoade ◽  
Victor M. Peddemors ◽  
...  
Keyword(s):  
Water Depth ◽  
Environmental Conditions ◽  
New South ◽  
Marine Ecosystem ◽  
New South Wales ◽  
Cost Effective ◽  
Independent Observer ◽  
South Wales ◽  
User Groups ◽  
Shark Attacks

Abstract ContextA series of unprovoked shark attacks on New South Wales (Australia) beaches between 2013 and 2015 triggered an investigation of new and emerging technologies for protecting bathers. Traditionally, bather protection has included several methods for shark capture, detection and/or deterrence but has often relied on environmentally damaging techniques. Heightened environmental awareness, including the important role of sharks in the marine ecosystem, demands new techniques for protection from shark attack. Recent advances in drone-related technologies have enabled the possibility of real-time shark detection and alerting. AimTo determine the reliability of drones to detect shark analogues in the water across a range of environmental conditions experienced on New South Wales beaches. MethodsA standard multirotor drone (DJI Inspire 1) was used to detect shark analogues as a proxy during flights at 0900, 1200 and 1500 hours over a 3-week period. The 27 flights encompassed a range of environmental conditions, including wind speed (2–30.0kmh−1), turbidity (0.4–6.4m), cloud cover (0–100%), glare (0–100%), seas (0.4–1.4m), swells (1.4–2.5m) and sea state (Beaufort Scale 1–5 Bf). Key resultsDetection rates of the shark analogues over the 27 flights were significantly higher for the independent observer conducting post-flight video analysis (50%) than for the drone pilot (38%) (Wald P=0.04). Water depth and turbidity significantly impaired detection of analogues (Wald P=0.04). Specifically, at a set depth of 2m below the water surface, very few analogues were seen by the observer or pilot when water turbidity reduced visibility to less than 1.5m. Similarly, when water visibility was greater than 1.5m, the detection rate was negatively related to water depth. Conclusions The present study demonstrates that drones can fly under most environmental conditions and would be a cost-effective bather protection tool for a range of user groups. ImplicationsThe most effective use of drones would occur during light winds and in shallow clear water. Although poor water visibility may restrict detection, sharks spend large amounts of time near the surface, therefore providing a practical tool for detection in most conditions.

Using the law to enhance provision of telemedicine

2000 ◽  
Vol 6 (1_suppl) ◽  
pp. 59-62 ◽  
Author(s):  
L O'shannessy
Keyword(s):  
New South ◽  
New South Wales ◽  
Cost Effective ◽  
New Techniques ◽  
South Wales ◽  
The Law ◽  
The Right

Reference is often made to the law as a barrier to the use and development of telemedicine. In New South Wales, however, it has been recognized that some of the principles behind these ‘legal impediments’ can be used to make services better and more cost-effective. The law offers a range of useful tools relating to the emergence of these new techniques. The responsibility of those in a position to regulate is, quite simply, to pick the right tool.

The response of Phalaris tuberosa and other grasses to seasonal heavy stocking on the southern tablelands of New South Wales

1964 ◽  
Vol 4 (13) ◽  
pp. 141 ◽  
Author(s):  
EF Biddiscombe
Keyword(s):  
Natural Regeneration ◽  
New South ◽  
Dactylis Glomerata ◽  
Perennial Grasses ◽  
The Third ◽  
South Eastern ◽  
Commercial Strain ◽  
South Wales ◽  
Eastern Australia ◽  
Dactylis Glomerata L

Seven perennial grasses were evaluated for animal production and for persistence, when stocked heavily in summer or winter with young Merino wethers. The commercial strain of Phalaris tuberosa L., which is sown commonly in south-eastern Australia and is often low yielding during summer and winter, was taken as the standard. At first, the productivity of Bromus inernis Leyss. in summer and Dactylis glomerata L. (Brignoles strain) in winter was reflected in higher liveweight and wool yields for these seasons. This advantage over Phalaris was lost when the Bromus pasture weakened in the third summer and the Dactylis in the third winter. The latter sward revived by natural regeneration from seed, whereas P. tuberosa developed and maintained a dense sward of the original plants. On this evidence Bromus and Dactylis are possible replacements for Phalaris for specific seasonal purposes, but management to retain vigorous swards still needs study. These aspects are discussed.

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