Reconnaissance limnology of some coastal dune lakes of Cape York Peninsula, Queensland

1986 ◽  
Vol 37 (2) ◽  
pp. 167 ◽  
Author(s):  
BV Timms
Keyword(s):  
Coastal Dune ◽  
Tropical Species ◽  
Eastern Australia ◽  
Dune Lakes ◽  
Littoral Invertebrates ◽  
Cape York ◽  
Almost All

All nine lakes studied are small (mean area 32 ha), shallow (< 5 m deep), watertable exposures in thin dunes overlying laterite or sandstone. Their water is fresh (mean salinity 52 mg I-1), acid (mean pH 4.8) and dominated by Na+ and Cl-, but with appreciable amounts of Ca2+, Mg2+ and HCO3-. Almost all macrophytes, littoral invertebrates, fish and limnetic zooplankters are common tropical species. A few species are shared with dune lakes in southern Australia and even fewer are endemic. Hence, these tropical dune lakes are different from those in temperate and subtropical eastern Australia.

Rhytismatales of Australasia

2001 ◽  
Vol 14 (3) ◽  
pp. 377 ◽  
Author(s):  
Peter R. Johnston
Keyword(s):  
Genetic Diversity ◽  
The Other ◽  
Tropical Species ◽  
Broad Host Range ◽  
Eastern Australia ◽  
Molecular Studies ◽  
Single Host ◽  
Close Relatives ◽  
Almost All ◽  
Taxonomic Studies

The Rhytismatales are both genetically and biologically diverse in Australasia. Although taxonomically one of the better known groups of ascomycetes from the region, almost all knowledge on the group is confined to species from south-eastern Australia and New Zealand. The indigenous Australasian species show two distinct patterns of geographic relationship—one group comprises species with a broad tropical distribution, the other comprises species that have close relatives on phylogenetically related hosts in other parts of the temperate Southern Hemisphere. While the widespread tropical species have a broad host range, the others tend to be specialised toward a single host. Further research required includes alpha-taxonomic studies from other parts of Australasia, study of the biological roles these fungi play in Australasian forests and molecular studies on the origin of the genetic diversity of the order in this region.

Limnological characteristics of two coastal Dune Lakes, Jervis Bay, South Eastern Australia

1993 ◽  
Vol 44 (3) ◽  
pp. 437 ◽  
Author(s):  
RH Norris ◽  
JL Moore ◽  
WA Maher ◽  
LP Wensing
Keyword(s):  
Oxygen Depletion ◽  
Coastal Dune ◽  
Organic Load ◽  
Physical Factors ◽  
Biological Interactions ◽  
Marine Aerosols ◽  
Low Salinity ◽  
Eastern Australia ◽  
Dune Lakes ◽  
Wind Mixing

Limnological features of two permanent, closed, coastal dune lakes that are separated by only about 400 m are reported. The depth of Lake Windermere fluctuated by about 7 m during this study (1982- 1988); however, fluctuations up to 15 m were observed between 1970 and 1988. Lake Windermere is exposed to wind mixing, is transparent and is usually mixed, or only weakly stratified. Lake McKenzie is semi-perched, darkly coloured and strongly stratified with an anoxic hypolimnion during summer. It is about one fifth of the surface area and half the depth of Lake Windermere and protected from wind mixing. Both lakes are acidic and have low salinity, and the dominant ions are sodium and chloride probably from precipitation of marine aerosols. Oxygen depletion in the hypolimnion of both lakes indicates a substantial organic load, the source of which is allochthonous material from the catchment rather than autochthonous material. Lake Windermere had higher densities of zooplankton (mostly Calamoecia tasmanica) than Lake McKenzie, but the latter lake had higher numbers of the predaceous Chaoborus sp. Lake McKenzie had higher invertebrate densities than Lake Windermere and these fluctuated widely between years, corresponding with variation in rainfall. Mayflies and chironomids were numerically dominant in Lake McKenzie, and caddisflies and chironomids were numerically dominant in Lake Windermere. Turtle and odonate predators were more common in Lake McKenzie than in Lake Windermere. It is postulated that biological interactions are more important in shaping the communities in Lake McKenzie and physical factors such as wave action are more important in Lake Windermere.

A limnological survey of the freshwater coastal lakes of east Gippsland, Victoria

1973 ◽  
Vol 24 (1) ◽  
pp. 1 ◽  
Author(s):  
BV Timms
Keyword(s):  
Water Chemistry ◽  
Chloride Ions ◽  
Coastal Dune ◽  
Limited Data ◽  
Coastal Lakes ◽  
Bicarbonate Ions ◽  
Dune Lakes ◽  
Littoral Invertebrates ◽  
Physical And Chemical ◽  
Limnological Survey

Eleven lakes were examined in varying degrees of intensity. For the largest two, Lakes Elusive and Barracoota, information is presented on physiography, major physical and chemical features, macrophytes, zooplankton, littoral invertebrates, benthos, and fish. Limited data, mainly on water chemistry and zooplankton, are given for the remaining lakes. The lakes are divisible into three groups. The four floodplain lagoons contain alkaline water dominated by sodium and bicarbonate ions. Zooplankton in each consists of Boeckella minuta, Thermocyclops hyalinus, and Daphnia lumholtzi, as well as a variety of other entomostracans. The coastal dune lakes have acid water dominated by sodium and chloride ions and a restricted zooplankton of one to three species, including Calarnoecia tasmanica. Compared with coastal dune lakes of southern Queensland, these are heterogenous in mode of origin, water chemistry, and zooplankton. Despite some similarities with dune lakes, Lake Barracoota is basically different. Its physiography suggests a recent marine origin which is confirmed by the presence of two isopods and a polychaete with marine affinities.

Coastal dune waterbodies of north-eastern New South Wales

1982 ◽  
Vol 33 (2) ◽  
pp. 203 ◽  
Author(s):  
BV Timms
Keyword(s):  
New South ◽  
Coastal Dunes ◽  
South Wales ◽  
Eastern Australia ◽  
Water Tables ◽  
North Eastern ◽  
Dune Lakes ◽  
Littoral Invertebrates ◽  
Physicochemical Features ◽  
Solids Content

Twenty-two lakes, swamps and ponds on, or adjacent to, siliceous coastal dunes from Newcastle to Tweed Heads were investigated. Most of the waterbodies originated by deflation, with organic accumulation and development of perched water-tables involved in establishing those in higher dunes inland. Some were located in depressions in hard rock, blocked by dunes. Most had low total dissolved solids content with Na+ and Cl- dominant, but in and near frontal dunes Ca2+ and HCO3- were important and salinity was higher. Dissolved organic matter coloured the water of those with swampy environs. Humic waters were markedly acidic, frontal dune ponds alkaline, and lakes in contact with dunes near neutral. The physicochemical features of the only waterbody connected to the sea, Blue Lagoon, varied spatially and temporally with rainfall. Lake muds were dys. The dominant plants were all emergents, with Lepironia auriculata (Retz) prominent in most waterbodies on or near leached dunes. Calamoecia tasmanica (Smith) dominated the plankton; species diversity was higher in lakes in contact with dunes than in those surrounded by leached dunes. No euzooplankters were recovered from frontal dune ponds or Blue Lagoon. Overall, littoral invertebrates were reasonably diverse but limited in frontal dune ponds. Most notable was the restriction of molluscs and ostracods to sites on or adjacent to frontal dunes, the presence of some characteristic microcrustaceans in sites on or near leached dunes, and the ubiquity of many insect groups, particularly hemipterans and coleopterans. Benthos was depauperate in species and numbers in lakes surrounded by leached dunes; diversity and standing crops were higher in lakes in contact with dunes. <P.A typology scheme, based on, and showing the interrelationships between, mode of origin, water chemistry and salient biological features, showed much greater heterogeneity among dune lakes in eastern Australia than previously thought.

Naïve rainforest frogs on Cape York, Australia, are at risk of the introduction of amphibian chytridiomycosis disease

2018 ◽  
Vol 66 (3) ◽  
pp. 174
Author(s):  
Conrad J. Hoskin ◽  
Harry B. Hines ◽  
Rebecca J. Webb ◽  
Lee F. Skerratt ◽  
Lee Berger
Keyword(s):  
At Risk ◽  
High Risk ◽  
Emergency Procedure ◽  
Eastern Australia ◽  
Risk Of Disease ◽  
Cape York

Amphibian chytridiomycosis disease has caused widespread declines and extinctions of frogs in cool, wet habitats in eastern Australia. Screening suggests that the disease does not yet occupy all areas modelled to be environmentally suitable, including rainforests on Cape York Peninsula. Cape Melville is an area of rainforest with several endemic frogs, including the stream-associated Melville Range treefrog (Litoria andiirrmalin), which is deemed at particular risk of disease impacts. We tested 40 L. andiirrmalin for chytrid infection by PCR and found them all to be negative. In conjunction with previous testing at another high-risk location, McIlwraith Range, this suggests that endemic rainforest frogs on Cape York have been spared the introduction of chytridiomycosis. We discuss how the disease could get to these areas, what can be done to reduce the risk, and suggest an emergency procedure should it be introduced.

An extension to the known range of the eastern grey kangaroo Macropus giganteus on Cape York Peninsula.

2005 ◽  
Vol 27 (2) ◽  
pp. 225 ◽  
Author(s):  
EG Ritchie
Keyword(s):  
Arid Regions ◽  
Grey Kangaroo ◽  
Eastern Australia ◽  
Northern Cape ◽  
Cape York ◽  
Open Forests ◽  
Semi Arid

THE eastern grey kangaroo (Macropus giganteus) is one of Australia?s widest-ranging large macropodids, occurring in open forests, woodlands, subalpine woodland, farmland, and semi-arid regions throughout most of eastern Australia (Menkhorst and Knight 2001). However current general accounts (e.g., Poole 1995, Menkhorst and Knight 2001) regard M. giganteus as being absent from the northern Cape York Peninsula.

Sapindaceae and the biogeography of eastern Australia

1996 ◽  
Vol 9 (2) ◽  
pp. 127 ◽  
Author(s):  
H Turner
Keyword(s):  
New Guinea ◽  
Western Pacific ◽  
Dispersal Pattern ◽  
The West ◽  
Eastern Australia ◽  
Cape York ◽  
Surrounding Areas ◽  
Dispersal Events ◽  
The Relationship ◽  
The Western Pacific

The biogeographic relations within eastern Australia and of this region to surrounding areas in New Guinea, West Malesia and the western Pacific are analysed using eight monophyletic groups of Sapindaceae. The results show that areas within eastern Australia are related (Cape York (Atherton Plateau + South East Queensland)), confirming similar results obtained by revious authors. The relationship between eastern Australia and surrounding areas is shown to be complex, involving both vicariance and dispersal events. There are at least two patterns connecting Australia to the West Pacific: an old vicariance (or dispersal) pattern involving the eastern end of the Inner Melanesian Arc and a more recent dispersal pattern via New Guinea involving the Outer Melanesian Arc. West Malesia is also probably connected to eastern Australia by numerous dispersal events via New Guinea. At least two patterns relate eastern Australia to New Guinea: an old vicariance pattern and a younger dispersal pattern from New Guinea back to Australia. These results are compared briefly with those obtained in earlier studies.

Systematics of the Australian species of Dictyopteris (Dictyotales, Phaeophyceae)

2000 ◽  
Vol 13 (2) ◽  
pp. 283 ◽  
Author(s):  
J. A. Phillips
Keyword(s):  
Cell Layer ◽  
South Australia ◽  
Reproductive Organs ◽  
Cortical Layer ◽  
Tropical Species ◽  
Species Discrimination ◽  
Isolated Populations ◽  
Australian Species ◽  
Eastern Australia ◽  
Reproductive Characters

Eleven species of Dictyopteris are recognised for Australia. The tropical species D. australis (Sonder) Askenasy, D. deliculata Lamouroux, D. plagiogramma (Montagne) Vickers, D. repens (Okamura) B&oslash;rgesen, D. serrata (Areschoug) Hoyt and D. woodwardia (R.Brown ex Turner) C.Agardh are recorded for warmer coasts, although isolated populations of D. australis occur in the Gulfs region of South Australia. Dictyopteris acrostichoides (J.Agardh) Bornet and D. crassinervia (Zanardini) Schmidt are endemic to eastern Australia, with D. acrostichoides also extending to the eastern end of the southern coast. Dictyopteris gracilis Womersley and D. muelleri (Sonder) Reinbold occur on temperate southwestern and southern coasts. The west coast species Dictyopteris secundispiralis J.A.Phillips sp. nov. is described, and D. nigricans Womersley is reduced to a taxonomic synonym ofD. muelleri. Detailed comparative studies undertaken on these species have identified several new taxonomically-informative characters useful for generic circumscription and species discrimination. Thallus branches which have a cortical layer composed of large cuboidal cells and reproductive organs scattered in fertile zones are additional characters which characterise the genus. Australian species of Dictyopteris are now well defined by differences in several distinctive vegetative and reproductive characters such as thallus morphology, blade cell layer number, structure of the thallus apex, presence of marginal teeth and lateral veins, distribution and structure of hair bundles, sporangia, oogonia and antheridial sori.

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