Linking the Pleiades to a reawakened Black Duck Songline in Southeastern Australia

2021 ◽  
Author(s):  
Robert S. Fuller ◽  
Leslie W. Bursill
Keyword(s):  
Southeastern Australia ◽  
Black Duck

Predicting changes in distribution of a large coastal shark in the face of the strengthening East Australian Current

2020 ◽  
Vol 642 ◽  
pp. 163-177 ◽  
Author(s):  
Y Niella ◽  
AF Smoothey ◽  
V Peddemors ◽  
R Harcourt
Keyword(s):  
Austral Summer ◽  
Conservation Strategies ◽  
Limiting Factor ◽  
Commercial Fisheries ◽  
East Australian Current ◽  
Spatial And Temporal Patterns ◽  
Marine Animals ◽  
Factors Affecting ◽  
Southeastern Australia ◽  
The Face

In the face of accelerating climate change, conservation strategies will need to consider how marine animals deal with forecast environmental change as well as ongoing threats. We used 10 yr (2009-2018) of data from commercial fisheries and a bather protection program along the coast of New South Wales (NSW), southeastern Australia, to investigate (1) spatial and temporal patterns of occurrence in bull sharks and (2) environmental factors affecting bull shark occurrence along the coast of NSW. Predicted future distribution for this species was modelled for the forecast strengthening East Australian Current. Bull sharks were mostly harvested in small to larger estuaries, with average depth and rainfall responsible for contrasting patterns for each of the fisheries. There was an increase in the occurrence of bull sharks over the last decade, particularly among coastal setline fisheries, associated with seasonal availability of thermal gradients >22°C and both westward and southward coastal currents stronger than 0.15 and 0.60 m s-1, respectively, during the austral summer. Our model predicts a 3 mo increase in the availability of favourable water temperatures along the entire coast of NSW for bull sharks by 2030. This coastline provides a uniquely favourable topography for range expansion in the face of a southerly shift of warmer waters, and habitat is unlikely to be a limiting factor for bull sharks in the future. Such a southerly shift in distribution has implications for the management of bull sharks both in commercial fisheries and for mitigation of shark-human interactions.

American Black Duck (Anas rubripes)

2000 ◽  
Author(s):  
Jerry R. Longcore ◽  
Daniel G. McAuley ◽  
Gary R. Hepp ◽  
Judith M. Rhymer
Keyword(s):  
Anas Rubripes ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

Soil production on a retreating escarpment in southeastern Australia

Geology ◽  
2000 ◽  
Vol 28 (9) ◽  
pp. 787-790 ◽  
Author(s):  
Arjun M. Heimsath ◽  
John Chappell ◽  
William E. Dietrich ◽  
Kunihiko Nishiizumi ◽  
Robert C. Finkel
Keyword(s):  
Southeastern Australia ◽  
Soil Production

Watersheds may not recover from drought

Science ◽  
2021 ◽  
Vol 372 (6543) ◽  
pp. 745-749 ◽  
Author(s):  
Tim J. Peterson ◽  
M. Saft ◽  
M. C. Peel ◽  
A. John
Keyword(s):  
Natural Experiment ◽  
Southeastern Australia ◽  
Millennium Drought ◽  
Hydrological Droughts ◽  
Meteorological Droughts

The Millennium Drought (southeastern Australia) provided a natural experiment to challenge the assumption that watershed streamflow always recovers from drought. Seven years after the drought, the runoff (as a fraction of precipitation) had not recovered in 37% of watersheds, and the number of recovered watersheds was not increasing. When recovery did occur, it was not explained by watershed wetness. For those watersheds not recovered, ~80% showed no evidence of recovering soon, suggesting persistence within a low-runoff state. The post-drought precipitation not going to runoff was found to be likely going to increased evapotranspiration per unit of precipitation. These findings show that watersheds can have a finite resilience to disturbances and suggest that hydrological droughts can persist indefinitely after meteorological droughts.

Mallard–Black Duck Hybridization and Population Genetic Structure in North Carolina

2021 ◽  
Author(s):  
Daniel M. Lawson ◽  
Christopher K. Williams ◽  
Philip Lavretsky ◽  
Douglas L. Howell ◽  
Joseph C. Fuller
Keyword(s):  
North Carolina ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Black Duck
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