The Distribution of Red Kangaroos in Relation to Range Regeneration.

1993 ◽  
Vol 15 (1) ◽  
pp. 3 ◽  
Author(s):  
GL Norbury ◽  
DC Norbury
Keyword(s):  
Western Australia ◽  
Local Area ◽  
Arid Areas ◽  
Radio Tracking ◽  
Control Programs ◽  
Local Populations ◽  
Native Shrubs ◽  
The Impact ◽  
Widespread View ◽  
Semi Arid

Pastoralists frequently claim that attempts at range regeneration in arid and semi-arid areas are thwarted by kangaroos. This paper examines the possibility that the impact of kangaroo grazing is exacerbated by an influx of kangaroos onto regeneration sites. The amount of kangaroo dung in a 7500 ha paddock in arid Western Australia increased six-fold over a 15-month period following the removal of sheep. A similar influx was apparent in another destocked paddock that provided unusually high offtake of kangaroos by a commercial shooter. The amount of kangaroo dung remained relatively stable in a control paddock that was stocked. Some areas subject to cultivation and reseeding with native shrubs also showed increased amounts of kangaroo dung, indicating relatively intense kangaroo grazing. Radio-tracking of 46 kangaroos showed them to be mostly sedentary, suggesting that 'invading' kangaroos emerge from the local area. This conclusion is contrary to the widespread view that kangaroos migrate from distant locations. Thus, kangaroo control programs on sensitive areas are likely to be long-lasting because incursions are predominantly from local populations.

Stimulation on the impact of afforestation on the groundwater table in arid and semi-arid areas in northern China

2017 ◽  
Vol 37 (3) ◽  
Author(s):  
鲁晨曦 LU Chenxi ◽  
曹世雄 CAO Shixiong ◽  
石小亮 SHI Xiaoliang
Keyword(s):  
Northern China ◽  
Groundwater Table ◽  
Arid Areas ◽  
The Impact ◽  
Semi Arid

Impact of Red Kangaroos on the Pasture Layer in the Western Australian Arid Zone.

1993 ◽  
Vol 15 (1) ◽  
pp. 12 ◽  
Author(s):  
GL Norbury ◽  
DC Norbury ◽  
RB Hacker
Keyword(s):  
Species Diversity ◽  
Western Australia ◽  
Arid Zone ◽  
Perennial Grass ◽  
Shrub Community ◽  
Macropus Rufus ◽  
Perennial Shrub ◽  
Native Shrubs ◽  
The Impact ◽  
Western Australian

We studied the impact of grazing by red kangaroos (Macropus rufus) on pasture biomass and species diversity over a 32-month period in destocked open shrubland in the Gascoyne region of Western Australia. Grazing significantly impeded the accumulation of annual and perennial grass biomass in a degraded perennial shrub community (Pc0.001 and P<0.05) and on denuded sites that were cultivated and reseeded with native shrubs (P<0.01 and Pc0.01). The accumulation of annual and perennial forb biomass was unaffected by kangaroo grazing. After 12 months, pasture species diversity was significantly greater on degraded perennial sites protected from kangaroo grazing (P<0.05). Commercial kangaroo shooting did not alleviate the impact of kangaroo grazing on grass accumulation (P<0.01). Unless more effective methods of kangaroo control are integrated with stock reductions, the recovery of degraded rangeland pastures is likely to be severely limited.

scholarly journals Long-Distance Movements of Feral Cats in Semi-Arid South Australia and Implications for Conservation Management

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3125
Author(s):  
Jeroen Jansen ◽  
Hugh McGregor ◽  
Geoff Axford ◽  
Abbey T. Dean ◽  
Sebastien Comte ◽  
...  
Keyword(s):  
Large Scale ◽  
Control Strategies ◽  
South Australia ◽  
Arid Areas ◽  
Long Distance ◽  
Feral Cats ◽  
Control Programs ◽  
Movement Data ◽  
Study Sites ◽  
Semi Arid

Movements that extend beyond the usual space use of an animal have been documented in a range of species and are particularly prevalent in arid areas. We present long-distance movement data on five feral cats (Felis catus) GPS/VHF-collared during two different research projects in arid and semi-arid Australia. We compare these movements with data from other feral cat studies. Over a study period of three months in the Ikara-Flinders Ranges National Park, 4 out of 19 collared cats moved to sites that were 31, 41, 53 and 86 km away. Three of the cats were males, one female; their weight was between 2.1 and 4.1 kg. Two of the cats returned to the area of capture after three and six weeks. During the other study at Arid Recovery, one collared male cat (2.5 kg) was relocated after two years at a distance of 369 km from the area of collar deployment to the relocation area. The movements occurred following three years of record low rainfall. Our results build on the knowledge base of long-distance movements of feral cats reported at arid study sites and support the assertion that landscape-scale cat control programs in arid and semi-arid areas need to be of a sufficiently large scale to avoid rapid reinvasion and to effectively reduce cat density. Locally, cat control strategies need to be adjusted to improve coverage of areas highly used by cats to increase the efficiency of control operations.

Wastewater reuse in Mediterranean semi-arid areas: The impact of discharges of tertiary treated sewage on the load of polar micro pollutants in the Llobregat river (NE Spain)

Chemosphere ◽  
2011 ◽  
Vol 82 (5) ◽  
pp. 670-678 ◽  
Author(s):  
Marianne Köck-Schulmeyer ◽  
Antoni Ginebreda ◽  
Cristina Postigo ◽  
Rebeca López-Serna ◽  
Sandra Pérez ◽  
...  
Keyword(s):  
Wastewater Reuse ◽  
Arid Areas ◽  
Treated Sewage ◽  
Llobregat River ◽  
The Impact ◽  
Semi Arid ◽  
Micro Pollutants ◽  
Ne Spain

Environmental control of germination and dormancy of seeds of two cytotypes of Lygeum spartum L., a perennial grass of semi-arid and arid areas in Algeria

2010 ◽  
Vol 36 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Abderazak Djabeur ◽  
Meriem Kaid-Harche ◽  
Daniel Côme ◽  
Françoise Corbineau
Keyword(s):  
Environmental Control ◽  
Perennial Grass ◽  
Arid Areas ◽  
Semi Arid
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