The use of regional and alluvial groundwater by riparian trees in the wet‐dry tropics of northern Australia.

2021 ◽  
Author(s):  
Caroline A. Canham ◽  
Clément Duvert ◽  
Leah S. Beesley ◽  
Michael M. Douglas ◽  
Samantha A. Setterfield ◽  
...  
Keyword(s):  
Northern Australia ◽  
Dry Tropics ◽  
Riparian Trees ◽  
Alluvial Groundwater

scholarly journals Comparative water use by the riparian trees Melaleuca argentea and Corymbia bella in the wet-dry tropics of northern Australia

2006 ◽  
Vol 26 (2) ◽  
pp. 219-228 ◽  
Author(s):  
A. P. O'Grady ◽  
D. Eamus ◽  
P. G. Cook ◽  
S. Lamontagne
Keyword(s):  
Water Use ◽  
Northern Australia ◽  
Dry Tropics ◽  
Riparian Trees

Does Dingo Predation or Buffalo Competition Regulate Feral Pig Populations in the Australian Wet-Dry Tropics? An Experimental Study.

1995 ◽  
Vol 22 (1) ◽  
pp. 65 ◽  
Author(s):  
L Corbett
Keyword(s):  
Experimental Study ◽  
Sus Scrofa ◽  
Interference Competition ◽  
Fold Increase ◽  
Bubalus Bubalis ◽  
Northern Australia ◽  
Dry Tropics ◽  
Swamp Buffalo ◽  
And Control ◽  
The Relationship

Dingo (Canis farniliaris dingo) predation on feral pigs (Sus scrofa) in response to experimental changes in prey populations was measured over seven years in the seasonally wet-dry tropics of northern Australia. Following the removal of feral swamp buffalo (Bubalus bubalis) from half of the 614-km*2 study area, the number of pigs doubled and there was a 3-fold increase of pig in dingo diet. The relationship between the functional response of the dingo and pig abundance was negative and significant for both the treatment and control areas. This indicated that dingoes were not regulating the pig population. Instead, dingo predation probably acted in concert with interference competition by buffalo which decreased access to critical subterranean food for pigs during the dry season and thus limited population growth in pigs.

A study of soil erosion rates using 239Pu, in the wet-dry tropics of northern Australia

2020 ◽  
Vol 211 ◽  
pp. 106085
Author(s):  
R. Lal ◽  
L.K. Fifield ◽  
S.G. Tims ◽  
R.J. Wasson ◽  
D. Howe
Keyword(s):  
Soil Erosion ◽  
Northern Australia ◽  
Erosion Rates ◽  
Dry Tropics ◽  
Soil Erosion Rates

Relationship Between Climate and Provenance Variation in Eucalyptus Camaldulensis Dehnh.

1995 ◽  
Vol 22 (3) ◽  
pp. 453 ◽  
Author(s):  
A Gibson ◽  
EP Bachelard ◽  
KT Hubick
Keyword(s):  
Dry Matter ◽  
Eucalyptus Camaldulensis ◽  
Humid Tropics ◽  
The Other ◽  
Northern Australia ◽  
Axillary Shoots ◽  
Dry Tropics ◽  
Temperature Ranges ◽  
Eucalyptus Camaldulensis Dehnh ◽  
Semi Arid

The morphology and physiology of Eucalyptus camaldulensis seedlings grown from seed collected from two locations in the dry tropics, two in the humid tropics and two in semi-arid Northern Australia were compared in phytotron growth cabinets under well-watered and water-limited conditions and diurnal temperature ranges of 30-25 and 22-15�C. Seedlings from the two locations in each climate resembled each other more closely than they resembled seedlings from the other climates across the range of conditions tested. When water-limited, seedlings from the dry tropical and semi-arid climates had a higher allocation of dry matter to roots than seedlings from the humid tropics. However, those from the dry tropics shed their lower leaves and initiated small-leaved axillary shoots while those from the semi-arid climate retained their leaves and did not produce axillary shoots. In contrast, seedlings from the humid tropics responded by reduced gas (CO2 and H2O) exchange without changes in morphology or allocation of dry matter. These responses are appropriate for growth in each climate and are consistent with observations made on wild trees in the field, on trees in plantations overseas and also with data from seedlings grown in earlier glasshouse experiments.

Evaluation of risks for two native mammal species from feral cat baiting in monsoonal tropical northern Australia

2018 ◽  
Vol 45 (6) ◽  
pp. 518 ◽  
Author(s):  
Jaime Heiniger ◽  
Skye F. Cameron ◽  
Graeme Gillespie
Keyword(s):  
Rhodamine B ◽  
Native Species ◽  
Field Trials ◽  
Camera Traps ◽  
Northern Australia ◽  
Target Species ◽  
Mammal Species ◽  
Feral Cat ◽  
Feral Cats ◽  
Dry Tropics

Context Feral cats are a significant threat to native wildlife and broad-scale control is required to reduce their impacts. Two toxic baits developed for feral cats, Curiosity® and Hisstory®, have been designed to reduce the risk of baiting to certain non-target species. These baits involve encapsulating the toxin within a hard-shelled delivery vehicle (HSDV) and placing it within a meat attractant. Native animals that chew their food more thoroughly are predicted to avoid poisoning by eating around the HSDV. This prediction has not been tested on wild native mammals in the monsoonal wet–dry tropics of the Northern Territory. Aim The aim of this research was to determine whether northern quolls (Dasyurus hallucatus) and northern brown bandicoots (Isoodon macrourus) would take feral cat baits and ingest the HSDV under natural conditions on Groote Eylandt. Methods We hand-deployed 120 non-toxic baits with a HSDV that contained a biomarker, Rhodamine B, which stains animal whiskers when ingested. The species responsible for bait removal was determined with camera traps, and HSDV ingestion was measured by evaluating Rhodamine B in whiskers removed from animals trapped after baiting. Key results During field trials, 95% of baits were removed within 5 days. Using camera-trap images, we identified the species responsible for taking baits on 65 occasions. All 65 confirmed takes were by native species, with northern quolls taking 42 baits and northern brown bandicoots taking 17. No quolls and only one bandicoot ingested the HSDV. Conclusion The use of the HSDV reduces the potential for quolls and bandicoots to ingest a toxin when they consume feral cat baits. However, high bait uptake by non-target species may reduce the efficacy of cat baiting in some areas. Implications The present study highlighted that in the monsoonal wet–dry tropics, encapsulated baits are likely to minimise poisoning risk to certain native species that would otherwise eat meat baits. However, further research may be required to evaluate risks to other non-target species. Given the threat to biodiversity from feral cats, we see it as critical to continue testing Hisstory® and Curiosity® in live-baiting trials in northern Australia.

scholarly journals Productivity is negatively related to shoot growth across five mango cultivars in the seasonally wet-dry tropics of northern Australia

Fruits ◽  
2013 ◽  
Vol 68 (4) ◽  
pp. 279-289 ◽  
Author(s):  
Ping Lu ◽  
Elias K. Chacko ◽  
Sean L. Bithell ◽  
Heinz Schaper ◽  
Josef Wiebel ◽  
...  
Keyword(s):  
Shoot Growth ◽  
Northern Australia ◽  
Dry Tropics

scholarly journals The ‘wet-dry’ in the wet-dry tropics drives river ecosystem structure and processes in northern Australia

2011 ◽  
Vol 56 (11) ◽  
pp. 2169-2195 ◽  
Author(s):  
D. M. WARFE ◽  
N. E. PETTIT ◽  
P. M. DAVIES ◽  
B. J. PUSEY ◽  
S. K. HAMILTON ◽  
...  
Keyword(s):  
Ecosystem Structure ◽  
River Ecosystem ◽  
Northern Australia ◽  
Dry Tropics

Assessing the impacts of climate change and dams on floodplain inundation and wetland connectivity in the wet–dry tropics of northern Australia

2015 ◽  
Vol 522 ◽  
pp. 80-94 ◽  
Author(s):  
Fazlul Karim ◽  
Dushmanta Dutta ◽  
Steve Marvanek ◽  
Cuan Petheram ◽  
Catherine Ticehurst ◽  
...  
Keyword(s):  
Climate Change ◽  
Northern Australia ◽  
Dry Tropics ◽  
Wetland Connectivity ◽  
Floodplain Inundation ◽  
Impacts Of Climate Change

The influence of weather on the quality of tropical legume pasture during the dry season in northern Australia. III. Effects of digestibility and chemical composition

1989 ◽  
Vol 40 (3) ◽  
pp. 573 ◽  
Author(s):  
RL McCown ◽  
BH Wall
Keyword(s):  
Dry Matter ◽  
Mediterranean Climate ◽  
Dry Season ◽  
In Vitro Digestibility ◽  
Northern Australia ◽  
Pasture Legumes ◽  
Dry Matter Digestibility ◽  
Dry Tropics

In the semi-arid tropics, accumulated shed leaf of certain pasture legumes can provide highly nutritious feed for cattle in the dry season. Previous papers in this series have dealt with the fungal spoilage of leaf of Caribbean stylo in response to dew and unseasonal rainfall and the threat to acceptability by cattle. This paper focuses on the effects of varying degrees of moulding and leaching on dry matter digestibility of leaf of this legume. Uniform leaf material of high digestibility was exposed at six locations during the dry season and samples retrieved at 4-weekly intervals. From initial values of 75%. in vitro digestibility dropped to as low as 50%. Degree of moulding, as indicated by a quantitative index of discoloration, accounted for about 80�/o of loss. Moulding was much more important than leaching. This latter finding in the winter-dry tropics contrasts with previous findings in the summer-dry Mediterranean climate.

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