Altivasum Hedley, 1914 (Gastropoda: Turbinellidae) from South Western Australia

The Festivus ◽  
2018 ◽  
Vol 50 (4) ◽  
pp. 245-255
Author(s):  
Aart Dekkers ◽  
Stephen Maxwell
Keyword(s):  
Continental Shelf ◽  
Western Australia ◽  
Distinct Species ◽  
Current Understanding ◽  
The South ◽  
Geographic Separation ◽  
Western Side ◽  
Morphological Differences ◽  
Great Australian Bight ◽  
Western Australian

This paper seeks to correct the erroneous taxonomy associated with the current understanding of the Altivasum flindersi (Verco, 1914) complex based on type revision, morphological differences and geographic separation. Structurally, there are three distinct species that can be differentiated, Altivasum flindersi (Verco, 1914), A. typicum Hedley, 1916 and A. profundum sp. nov. Geographically, these species are not all sympatric, with A. typicum restricted to shallower waters, at depths around 20-180 m off the south Western Australian coast, whereas A. profundum is located at the edge of the South Western Australian continental shelf, and A. flindersi is found off the coast of the Great Australian Bight at similar depths to A. typicum. There is an overlap in distribution between A. typicum Hedley, 1916 and A. flindersi (Verco, 1914) on the western side of the Great Australian Bight where they are often associated with similar habitats.

The species of Alexgeorgea, a Western Australian genus of the restionaceae

1990 ◽  
Vol 3 (4) ◽  
pp. 751 ◽  
Author(s):  
BG Briggs ◽  
LAS Johnson ◽  
SL Krauss
Keyword(s):  
Western Australia ◽  
Rare Species ◽  
The South ◽  
South West ◽  
River Region ◽  
Western Australian

The three species of Alexgeorgea Carlquist are revised, including A. ganopoda L. Johnson & B. Briggs, a newly described rare species of the Mt Frankland–Bow River region of the south-west of Western Australia.

Dipole vortices in the Great Australian Bight

2015 ◽  
Vol 66 (2) ◽  
pp. 135 ◽  
Author(s):  
George R. Cresswell ◽  
Lars C. Lund-Hansen ◽  
Morten Holtegaard Nielsen
Keyword(s):  
Surface Temperature ◽  
Continental Shelf ◽  
Sea Surface Temperature ◽  
Sea Surface ◽  
The South ◽  
Leeuwin Current ◽  
A Chain ◽  
Salinity Difference ◽  
Great Australian Bight

Shipboard measurements from late 2006 made by the Danish Galathea 3 Expedition and satellite sea surface temperature images revealed a chain of cool and warm ‘mushroom’ dipole vortices that mixed warm, salty, oxygen-poor waters on and near the continental shelf of the Great Australian Bight (GAB) with cooler, fresher, oxygen-rich waters offshore. The alternating ‘jets’ flowing into the mushrooms were directed mainly northwards and southwards and differed in temperature by only 1.5°C; however, the salinity difference was as much as 0.5, and therefore quite large. The GAB waters were slightly denser than the cooler offshore waters. The field of dipoles evolved and distorted, but appeared to drift westwards at 5km day–1 over two weeks, and one new mushroom carried GAB water southwards at 7km day–1. Other features encountered between Cape Leeuwin and Tasmania included the Leeuwin Current, the South Australian Current, the Flinders Current and the waters of Bass Strait.

A General Account of the Intertidal Ecology of South Australian Coasts

1958 ◽  
Vol 9 (2) ◽  
pp. 217 ◽  
Author(s):  
HBS Womersly ◽  
SJ Edmonds
Keyword(s):  
Western Australia ◽  
Littoral Zone ◽  
South Australia ◽  
Transitional Region ◽  
The South ◽  
South Wales ◽  
Marine Angiosperms ◽  
Rocky Coast ◽  
Warm Temperate ◽  
Western Australian

An account is given of the environmental features. the intertidal ecology. and the biogeographical relationships of the coast of the State of South Australia . The central and western coasts of South Australia are similar ecologically in comparable areas . In the supralittoral Melaraphe unifasciata (Gray) is dominant (except where conditions are very calm) and at high levels on very exposed coasts Calothrix fasciculata C. Agardh is found. The littoral zone where the coast is most exposed consists of barnacles-Chamaesipho in the upper littoral, Catophragmus in the mid littoral, and Balanus in the lower littoral-but where the coast is more sheltered it consists of molluscs in the upper and mid littoral and algae (Corallina, Gelidium, or Hormosira) in the lower littoral. In the upper sublittoral fucoid algae or in calm regions marine angiosperms are dominant. The south-east coast, however, differs in some respects from the central and west coasts. The number of barnacles found in the littoral zone is much reduced and the giant brown algae, Durvillea potatorum Areschoug and Macrocystis angustifolia Bory, are dominant in the upper sublittoral. This is associated with slightly lower sea temperatures. Sheltered coasts are more prominent in South Australia than in the eastern States of Australia. These include the shores of Spencer and St. Vincent Gulfs, the northern shores of Kangaroo I., and a number of scattered bays. The similarities between the coasts of South Australia and Victoria (Bennett and Pope 1953) are greater than the differences. Consequently the proposal of Bennett and Pope to recognize the Victorian and Tasmanian coasts as the Maugean Biogeographical Provinoe and the South Australian and the south-west Western Australian coasts as the Flindersian Province appears to be unjustified. It is suggested that the Naugean is best regarded as a subprovince with the Flindersian. The latter includes most of the coast of southern Australia. Considerable differences are noticeable between the organisms which inhabit the rocky coast of South Australia and the south coast of Western Australia. The available evidence indicates that a transition from the Flindersian to the tropical Dampierian Province occurs along the south and west coasts of Western Australia. The terms "Indo-Australian Province" and "Baudinian Province" have been proposed by previous authors to describe this transitional region. The Flindersian Province appears to be intermediate between cold-temperate and warm-temperate regions, becoming distinctly cool-temperate in Tasmania. It is relatively distinct from the warm-temperate Peronian Province of the coast of New South Wales.

Observations of warming on the Western Australian continental shelf

2007 ◽  
Vol 58 (10) ◽  
pp. 914 ◽  
Author(s):  
Alan Pearce ◽  
Ming Feng
Keyword(s):  
Indian Ocean ◽  
Continental Shelf ◽  
Southern Oscillation ◽  
Warming Trend ◽  
Eastern Indian Ocean ◽  
The South ◽  
Leeuwin Current ◽  
South Eastern ◽  
The Past ◽  
Western Australian

Global temperature datasets indicate a warming trend in the south-eastern Indian Ocean of ~0.02°C year–1. This is supported by in situ temperature measurements at a coastal monitoring station on the Western Australian continental shelf that have shown a mean temperature rise of 0.013°C year–1 since 1951, corresponding to ~0.6°C over the past 5 decades. Measurements from three other shallow stations between 1985 and 2004 indicated warming trends of 0.026–0.034°C year–1. It is suggested that enhanced air–sea heat flux into the south-eastern Indian Ocean may be a key factor in the rising temperature trend. There has also been a steady rise in salinity over the past half-century. At interannual scales, coherent temperature variability at the various stations indicates that larger-scale processes are influencing the shelf waters and are linked with El Niño/Southern Oscillation (ENSO)-related events in coastal sea level and hence the Leeuwin Current.

The Lehmannianae: a Natural Group of Western Australian Eucalypts

1980 ◽  
Vol 28 (6) ◽  
pp. 523 ◽  
Author(s):  
DJ Carr ◽  
SGM Carr
Keyword(s):  
New Species ◽  
Western Australia ◽  
Coastal Region ◽  
The South ◽  
Oil Glands ◽  
Natural Group ◽  
Western Australian

A new series of Eucalyptus L'Hérit. is defined. It includes E. lehmannii (Schau.) Benth., E. burdettiana Blakely & Steedman and E. megacovnuta C. A. Gardn. In addition, four new species (E. conferruminata, E. bennettiae, E. newbeyi and E. talyuberlup) are described. A long-standing misapprehension concerning the identity of E. lehmanniiis removed. E. macvocera Turcz. (as to type) with which E. talyubevlup and other species have been identified is shown to be synonymous with E. cornuta Labill. Four of the species of the series are lignotuberous and are therefore actually or potentially mallees. The others are small trees. All have spirally arranged adult leaves in three orthostichies (phyllotaxis (3 + I)) and seedling leaves and stems with emergent oil glands ('stellate hairs') crowned with radiately arranged unicellular hairs. The stomata of adult leaves are arranged in chains in crypts. The pith of the stem lacks oil glands. The cotyledons are forked or bilobed. The basitonic inflorescences bear sessile or subsessile flowers with horn-shaped opercula on deflexed, flattened peduncles which have multiple vascular strands. The phyllotaxis of series Lehmannianae and the form of the nectary in E. bennettiae are unique among eucalypts. All the species of the Lehmannianae are endemic to the south coastal region of Western Australia.

Sodic soils in Western Australia

Soil Research ◽  
1994 ◽  
Vol 32 (3) ◽  
pp. 359 ◽  
Author(s):  
HR Cochrane ◽  
G Scholz ◽  
AME Vanvreswyk
Keyword(s):  
Western Australia ◽  
Sandy Loam ◽  
The State ◽  
Land Values ◽  
Discrete Problem ◽  
Exchangeable Sodium ◽  
The South ◽  
Sodic Soils ◽  
South West ◽  
Western Australian

Sodic soils are common throughout Western Australia, particularly in the south-west agricultural area where they occur mainly as duplex or gradational profiles. Soils with sodic properties are dominant in 26% of the state; saline-sodic sediments and soils in intermittent streams, lakes and estuarine plains occupy a further 5%. Sodic soils are moderately common throughout the south and western portion of the rangeland areas (38% of the state). The south-west coastal sands and the desert and rangeland soils to the north and east of the state are rarely sodic. Although sodicity has been recognized as a discrete problem in W.A. soils since the 1920s, the extent and severity of sodicity has been satisfactorily described only for small areas of the state and most land managers are unaware of the role sodicity plays in limiting the productivity of their soils. Sodicity is implicated in a diversity of problems for both agricultural and non-agricultural uses of Western Australian soils. Subsoil impermeability is probably the most widespread of these, but no comprehensive, quantitative assessment of the influence of exchangeable sodium on subsoil properties has been undertaken. Topsoil sodicity is much less extensive but can severely restrict land productivity, particularly on sandy loam and finer textured soils which set hard when dry. The physical behaviour of Western Australian topsoils cannot usefully be predicted from measurements of exchangeable sodium alone because soils differ so greatly in their response to changing exchangeable sodium. Some remain structurally stable at ESP values >15 while others are so 'sodium-sensitive' that they exhibit highly dispersive behaviour at ESP values as low as 2%. Land values over much of the dryland farming and pastoral areas of W.A. do not justify sustained use of amendments which would reduce soil exchangeable sodium contents. Efficient management of sodic soils in these areas must rely on the prevention of degradation and the use of biological and physical means to maintain adequate soil physical properties. Effective restoration of degraded sodic soils, however, often does require application of inorganic amendments in combination with tillage to initiate structural recovery. Sodicity is currently not considered to be a problem at any of the three main irrigation areas in W.A., but all have sodic soil within their potentially irrigable lands, which may limit their future expansion.

Phylogenetic relationships of the heath dragons (Rankinia adelaidensis and R. parviceps) from the south-western Australian biodiversity hotspot

2008 ◽  
Vol 56 (3) ◽  
pp. 159 ◽  
Author(s):  
Jane Melville ◽  
Luke P. Shoo ◽  
Paul Doughty
Keyword(s):  
Habitat Preferences ◽  
Taxonomic Revision ◽  
Biodiversity Hotspot ◽  
Phylogenetic Study ◽  
The South ◽  
Generic Level ◽  
Nuclear Introns ◽  
Eastern Australia ◽  
Morphological Differences ◽  
Western Australian

Although the south-western Australian region is recognised as a global biodiversity hotspot, there are still significant gaps in our understanding of the biodiversity of this region. We present a phylogenetic study of the heath dragons (Rankinia adelaidensis and R. parviceps) from this region, incorporating a 1612-bp section of mtDNA and two nuclear introns, Gapdh (~244 bp) and Enol (~330 bp). In addition, we present a generic-level analysis of three gene regions (mtDNA, Gapdh, BDNF), which provides clear evidence that Rankinia adelaidensis and R. parviceps are not closely related to Rankinia diemensis from eastern Australia. Instead, the heath dragons are strongly supported as forming a clade with the genus Ctenophorus. In addition, we find that there are significant levels of haplotype divergence between currently recognised subspecies of the heath dragons (R. a. adelaidensis, R. a. chapmani, R. p. parviceps, R. p. butleri). We suggest that the genetic divergences between subspecies result from geographic isolation in allopatry owing to habitat preferences, followed by drift and/or selection. On the basis of these deep divergences and consistent morphological differences between subspecies, we recommend elevating all taxa to full species, and provide a taxonomic revision of the genera Rankinia and Ctenophorus.

Six new species of Australocosmica Köhler, 2011 from the Kimberley islands, Western Australia (Mollusca: Pulmonata: Camaenidae)

Zootaxa ◽  
2013 ◽  
Vol 3608 (2) ◽  
pp. 101-115 ◽  
Author(s):  
FRANCESCO CRISCIONE ◽  
FRANK KÖHLER
Keyword(s):  
New Species ◽  
Dna Extraction ◽  
Western Australia ◽  
Narrow Range ◽  
Distinct Species ◽  
Land Snails ◽  
Shell Morphology ◽  
Generic Diagnosis ◽  
Candidate Species ◽  
Western Australian

The Western Australian Kimberley region harbours a diverse fauna of camaenid land snails characterised by marked patterns of narrow range endemism. The recently described genus Australocosmica comprised three species that are endemic to single offshore islands or island groups. Material of a further seven candidate species recognised by the late Alan Solem has been examined. Six of these manuscript species, NSP 40 (= A. rotunda n. sp.), NSP 76 (= A. pallida n. sp.), NSP 77 (= A. buffonensis n. sp.), NSP 78 (= A. bernoulliensis n. sp.), NSP 79 (= A. crassicostata n. sp.), and NSP 80 (= A. nana n. sp.), are here newly described based on examination of shell morphology and penial anatomy. Based on our findings, we are presenting an updated generic diagnosis of Australocosmica. Statistical analyses revealed that species exhibit similar shell characters (colouration, sculpture, dimensions), which render the delimitation of species based only on shells difficult. However, species were found to differ significantly in their penial anatomy. Although the material studied was not suitable for DNA extraction, the anatomical differences were considered sufficient to permit the description of distinct species.

Review of Aboriginal astronomy and navigation: A Western Australian focus

2021 ◽  
Vol 38 ◽  
Author(s):  
Patricia A. Forster
Keyword(s):  
Real Time ◽  
Western Australia ◽  
Social Behaviour ◽  
Aboriginal Peoples ◽  
The South ◽  
European Settlement ◽  
South West ◽  
Night Sky ◽  
Western Australian

Abstract This review of Aboriginal astronomy and navigation brings together accounts from widely dispersed places in Western Australia, from Noongar Country in the south-west, through to the Eastern Goldfields, the Pilbara, the Kimberley and the Central Deserts. Information for this review has been taken from the literature and non-conventional sources, including artist statements of paintings. The intention for the review is that the scope is traditional, pre-European settlement understandings, but post-settlement records of oral accounts, and later articulation by Aboriginal peoples, are necessarily relied upon. In large part, the Western Australian accounts reflect understandings reported for other states. For example, star maps were used for teaching routes on the ground, but available accounts do not evidence that star maps were used in real-time navigation. The narratives or dreamings that differ most from those of other states explain creation of night-sky objects and landforms on Earth, events including thunder, or they address social behaviour.

Siphonoecetini Just, 1983 (Crustacea, Amphipoda, Ischyroceridae) 13: Western Australian species of Bubocorophiina in Rhinoecetes, Cephaloecetes, Sinoecetes, Borneoecetes and Pararhinoecetes gen. nov.

Zootaxa ◽  
2019 ◽  
Vol 4554 (1) ◽  
pp. 101
Author(s):  
JEAN JUST
Keyword(s):  
New Species ◽  
Western Australia ◽  
New Genus ◽  
First Record ◽  
The South ◽  
North West ◽  
Australian Species ◽  
The North ◽  
Southeast Coast ◽  
Western Australian

The Western Australia fauna of Bubocorophiina (Siphonoecetini) from the Albany area in the south to Port Hedland in the north-west, a coastal stretch of about 2000 km, is reported. One new genus and 11 new species are described: Rhinoecetes sinuduopopulus sp. nov., R. rockinghamia sp. nov., R. makritrichoma sp. nov., R. lowryi sp. nov., R. caetus sp. nov., R. karkharius sp. nov., R. wamus sp. nov., R. setosus sp. nov., Borneoecetes minimus sp. nov. (first record of Borneoecetes Barnard & Thomas, 1984 from Australia); Sinoecetes reni sp. nov. (first record of Sinoecetes Ren, 2012 from Australia), and Pararhinoecetes bicornis gen. et sp. nov. In addition, Cephaloecetes enigmaticus, previously described from the southeast coast of Australia, is recorded in the Albany area. A key to Western Australian Bubocorophiina is presented, and the distribution around Australian of the genera in the subtribe is commented upon. 

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