Mating types, sex, dissemination, and possible sources of clones, of Hypomyces (Fusarium) solani, f. pisi in South Australia

1968 ◽  
Vol 19 (2) ◽  
pp. 253 ◽  
Author(s):  
RJ Cook ◽  
EJ Ford ◽  
WC Snyder
Keyword(s):  
Mating Type ◽  
Fusarium Solani ◽  
New South ◽  
South Australia ◽  
The United States ◽  
Mating Types ◽  
North West ◽  
South Wales ◽  
The Pacific ◽  
Pea Seed

Isolates of Hypornyces (Fusarium) solani f. pisi collected in South Australia, when single-spored and cultured under the same conditions, were separable into three distinct clones. Pairings of the three clones (SA-1, 2, and 3), and of a fourth collected in New South Wales (NSW-I), with tester clones of known mating type and sex, showed that SA-1 and SA-2 were of one mating type (+), while SA-3 and NSW-1 were of another mating type (–). SA-1 and NSW-1 were hermaphrodites; SA-2 and SA-3 functioned only as males. When SA-1 and NSW-1 were paired in reciprocal crosses, fertile perithecia developed in both cases. Fertile perithecia also developed when SA-2 and SA-3 were used as males to fertilize NSW-1 and SA-1 respectively. A clone of H. solani f. pisi, identical with SA-1 in pathogenicity, cultural appearance, sex, and mating type, was recovered from wind-blown soil in a virgin area approximately 1 mile from a pea field but not from soil taken from districts some distance (30 miles in one case and 200 miles in another) from pea-growing districts. Other isolates identical with SA-1 in cultural appearance, mating type, sex, and pathogenicity were recovered from dust taken from a bag of non-treated, certified New Zealand pea seed imported into South Australia, from field soil collected in pea seed-producing areas of the Pacific North-west of the United States, and from England. The occurrence of compatible clones on different continents appears to be due to an international movement of the fungus on pea seed.

scholarly journals The goblin spider genus Opopaea in Australia and the Pacific islands (Araneae: Oonopidae)

2013 ◽  
Vol 58 ◽  
pp. 107-338
Author(s):  
Barbara Baehr ◽  
◽  
Mark Harvey ◽  
H.M. Smith ◽  
R. Ott ◽  
...  
Keyword(s):  
Pacific Islands ◽  
New Records ◽  
New Caledonia ◽  
New South ◽  
South Australia ◽  
New Combination ◽  
Australian Species ◽  
South Wales ◽  
The Pacific ◽  
New Synonymy

The widespread and highly diverse goblin spider genus Opopaea Simon is a pantropical genus with biodiversity hotspots in Africa, Asia and Australia. We revise the Australian and Pacific species of the genus, provide redescriptions of the Australian species O. banksi (Hickman) and the Micronesian species O. foveolata Roewer, and new records of the pantropical O. deserticola Simon and O. concolor (Blackwall), as well as O. apicalis (Simon) which is newly transferred from Epectris, after the new synonymy of Epectris with Opopaea. The following species are provisionally transferred from Epectris to Opopaea, pending investigations into their generic affinities: O. conujaingensis (Xu), new combination from China; and O. mollis (Simon), new combination from Sri Lanka. Most Pacific Islands are inhabited by the four above-mentioned species but the following 15 newly described species are most likely native to the islands: from Fiji (O. fiji), Hawaii (O. hawaii), Palau (O. palau), New Caledonia (O. amieu, O. bicolor, O. burwelli, O. calcaris, O. goloboffi, O. monteithi, O. ndoua, O. platnicki, O. raveni, O. striata, O. touho, O. tuberculata). We treat the Australian Opopaea fauna and recognise 84 species including 71 new and 13 previously described species. The new Australian species include 21 species from New South Wales (O. acuminata, O. addsae, O. bushblitz, O. gerstmeieri, O. lebretoni, O. linea (also occurs in Queensland), O. magna, O. margaretehoffmannae, O. martini, O. michaeli, O. milledgei, O. nitens, O. ottoi, O. plana, O. simplex, O. sturt, O. suelewisae, O. sylvestrella, O. tenuis, O. ursulae, O. yorki); six from Northern Territory (O. ephemera, O. fishriver, O. gilliesi, O. johardingae, O. preecei, O. wongalara); 13 from Queensland (O. ameyi, O. brisbanensis, O. broadwater, O. carnarvon, O. carteri, O. chrisconwayi, O. douglasi, O. lambkinae, O. leichhardti, O. mcleani, O. proserpine, O. stanisici, O. ulrichi); three from South Australia (O. millbrook, O. mundy, O. stevensi); and 28 from Western Australia (O. aculeata, O. aurantiaca, O. billroth, O. callani, O. cowra, O. durranti, O. exoculata, O. flava, O. fragilis, O. framenaui, O. gracilis, O. gracillima, O. harmsi, O. johannae, O. julianneae, O. marangaroo, O. millstream, O. nadineae, O. pallida, O. pannawonica, O. pilbara, O. rixi, O. robusta, O. rugosa, O. subtilis, O. triangularis, O. wheelarra, O. whim). New records are provided for O. sown Baehr. Seven area-based keys to species are provided.

Studies in the ecology of the Riverine Plain. IV. Basal area and density changes of Danthonia caespitosa Gaudich, in a natural pasture grazed by sheep

1968 ◽  
Vol 16 (3) ◽  
pp. 565 ◽  
Author(s):  
OB Williams
Keyword(s):  
New South ◽  
Age Groups ◽  
South Australia ◽  
Basal Area ◽  
Substantial Effect ◽  
Steady State Condition ◽  
North West ◽  
The North ◽  
South Wales ◽  
Natural Pasture

The changes in basal area and density of Danthonia caespitosa were measured over the 9-year period 1949-1957 by charting permanent quadrats in plots which were ungrazed, and lightly, moderately, and heavily grazed. Compared with the control, the grazing treatments had no effect on basal area, and a significant but not substantial effect on the contribution made by the various age groups of the dominant grass. There were no real differences between the age groups of D. caespitosa on continuously and intermittently grazed treatments, and it is suggested that the design of grazing experiments might be simplified, cognizance being given to the stage of degeneration reached by the pasture, and to the possibility that seasonal deferment procedures might cause substantial changes in botanical composition.. In the autumn or winter of 1951 the mature population of D. caespitosa was almost wiped out and the build-up of basal area and density over the 1951-1957 period was very slow. Dry summers and the late arrival of the opening rains in autumn appeared to be responsible for substantial losses in D. caespitosa. Abnormally high rainfall during the preceding growth season appeared to accentuate these losses. In the gilgai microrelief death rates were greater on the depression than on the shelf. It is suggested that the D. caespitosa grassland was degraded, and reached a "steady state" condition under the influence of cattle, sheep, rabbits, and drought. If grazing treatments are to induce changes in such a plant population, such treatments must be a wide departure from the previous procedures which have given rise to the existing plant community. The results are discussed in relation to grazing experiments in Queensland, New South Wales, South Australia, and the north-west of Western Australia.

Studies on the Yellow-Footed Rock-Wallaby, Petrogale xanthopus Gray (Marsupialia : Macropodidae) I. Distribution in South Australia

1983 ◽  
Vol 10 (1) ◽  
pp. 47 ◽  
Author(s):  
PB Copley
Keyword(s):  
At Risk ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
North West ◽  
The North ◽  
European Settlement ◽  
Introduced Herbivores ◽  
Flinders Ranges ◽  
South Wales

Petrogale xanthopus still occurs over most of its former range in South Australia. It is widespread in the Flinders Ranges, where almost 200 colonies are now known, and is locally common in areas of both the Rinders Ranges and Olary Hills. Six colonies are currently known in the western Gawler Ranges with an outlying population on Carriewerloo Station only 50 km west of Port Augusta. Seven colonies have been found in the Olary Hills, to the north and north-west of Olary. The species has suffered a major decline in abundance since European settlement, having become extinct locally throughout this range. Hunting for skins, competition with introduced herbivores for food and shelter, and predation by foxes seem to be the main reasons for this decline. However, it is still not possible to say whether the species currently has a decreasing population and is at risk, is in equilibrium, or is increasing. Information published in this paper and current studies in South Australia and New South Wales should soon determine this.

An additional record of the dusky hopping mouse Notomys fuscus in South Australia.

2008 ◽  
Vol 30 (1) ◽  
pp. 47 ◽  
Author(s):  
H. P. Waudby ◽  
T. How
Keyword(s):  
Heavy Rainfall ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Arid Areas ◽  
North West ◽  
North East ◽  
South West ◽  
South Wales

The dusky hopping mouse (Notomys fuscus) is present in the arid areas of South Australian, north-west New South Wales and south-west Queensland. In October-November 2007 during the seventh year of annual fauna monitoring on the Beverley mine lease, north of Lake Frome, 4 animals were detected. The closest known population is 70 km north-east. Heavy rainfall earlier in the year may have contributed to their presence.

scholarly journals Does dingo predation control the densities of kangaroos and emus?

1980 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
G. Caughley ◽  
G. C. Grigg ◽  
J. Caughley ◽  
G. J. E. Hill
Keyword(s):  
Environmental Gradients ◽  
New South ◽  
New South Wales ◽  
South Australia ◽  
Plant Composition ◽  
North West ◽  
The North ◽  
South Wales ◽  
Open Country ◽  
Predation Control

The density of red kangaroos in the sheep country of the north-west corner of New South Wales is much higher now that it was last century. It is also much higher than the present density across the dingo fence in the adjacent cattle country of South Australia and Queensland. The picture is similar for emus. Farther east, about halfway along the New South Wales–Queensland border, no difference in density between the two States could be detected for red kangaroos, grey kangaroos or emus. We examine and discard several hypotheses to account for the density contrasts in the west and the lack of them farther east, deeming it unlikely that the pattern reflects environmental gradients, or differences in plant composition and growth, hunting pressure or availability of water. Instead, we favour this hypothesis: that the past and present patterns of density are attributable directly to predation by dingoes, which can hold kangaroos at very low density in open country if the dingoes have access to an abundant alternative prey.

scholarly journals On the recent hiatus of tropical cyclones landfalling in NSW, Australia

2020 ◽  
Author(s):  
J. L. Gray ◽  
D. C. Verdon-Kidd ◽  
J. Callaghan ◽  
N. B. English
Keyword(s):  
Tropical Cyclones ◽  
Significant Contribution ◽  
New South ◽  
Sea Surface ◽  
Study Region ◽  
North West ◽  
South Wales ◽  
The Pacific ◽  
Landfalling Tropical Cyclones ◽  
The Tropics

It is well known that severe storms result in some of the costliest natural disasters for New South Wales (NSW), Australia. However, it is not widely acknowledged that some of these events are, in fact, a result of landfalling tropical cyclones (TCs). Indeed, the intense focus of TC research within the tropics generally disregards landfalling TC events in the mid-latitude regions of Australia. This is likely due to the perceived infrequency of these events compared to other more susceptible regions. Therefore, in this study, we review this assumption by developing a 150-year record of TC activity, based on a range of digitised and analogue historical datasets and identify 30 individual landfalling TCs that have impacted NSW. Periods of enhanced and reduced TC activity are observed, with a defined hiatus (absence of landfalling TCs) after approximately 1980. The recent decrease in TC activity is subsequently linked to an increase in El Niño activity and warming of north-west Australian sea-surface temperatures during this time. Importantly, it is possible that a return to enhanced TC activity could occur again in the future if the Pacific conditions align. We also propose that pre-instrumental data on TC activity need to be developed to appropriately quantify TC risk for the study region via the development of local palaeoclimate archives. This study provides a significant contribution to understanding the risks of NSW landfalling TCs and expands upon our knowledge of environmental conditions that influence landfalling TCs in NSW.

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