Regeneration of the vegetation on Koonamore vegetation Reserve, 1926-1962.

1964 ◽  
Vol 12 (2) ◽  
pp. 205 ◽  
Author(s):  
EAA Hall ◽  
RL Specht ◽  
CM Eardley
Keyword(s):  
Community Dynamics ◽  
South Australia ◽  
Range Management ◽  
Perennial Species ◽  
Shrub Species ◽  
The North ◽  
North Eastern ◽  
Perennial Vegetation ◽  
Acacia Aneura ◽  
Arid Vegetation

Koonamore Vegetation Reserve was established on an overgrazed section of arid vegetation in the north-eastern district of South Australia, in July 1925. It was fenced to exclude sheep and rabbits, or so it was hoped. This paper discusses the regeneration of perennial vegetation since that date. The species common on the Reserve (trees- Acacia aneura, Casuarina cristata, Myoporum platycarpum, Heterodendrum oleifolium, Eucarya acuminata; tall shrubs-Eremophila sturtii, E. scoparia, E. longifolia, Acacia burkittii, Cassia nemophila, C. sturtii; low shrubs-Atriplex vesicaria, A. stipitata, Kochia sedifolia) are characteristic of large areas of arid southern Australia. Little or no regeneration of most of the tree and shrub species has occurred in unprotected areas. Many stands are showing obvious signs of senescence and many trees have died. Rabbits appear to be a major problem hampering regeneration. However, stands of Atriplex spp. in paddocks adjacent to the south and east sides of the Reserve have provided a seed source for effective recolonization of some denuded areas within the Reserve. The regeneration of Cassia spp. has also been spectacular in some places. Problems in regeneration and fluctuations in numbers of perennial species are discussed in relation to community dynamics, range management, and soil erosion.

Hydrocotyle simulans (Araliaceae), a new perennial species from south-eastern Australia

Phytotaxa ◽  
2020 ◽  
Vol 437 (2) ◽  
pp. 66-72
Author(s):  
ANDREW J. PERKINS
Keyword(s):  
South Australia ◽  
Eastern Coast ◽  
Perennial Species ◽  
Photographic Images ◽  
South Eastern ◽  
The North ◽  
Eastern Australia ◽  
North Eastern ◽  
Floral Bracts ◽  
South Eastern Australia

Hydrocotyle simulans, a new perennial species from south-eastern Australia, is here described with associated illustration, photographic images and distribution map. The new species is restricted mostly to freshwater swamps in coastal areas of south-eastern South Australia, southern Victoria and to the Furneaux Group of islands, off the north-eastern coast of Tasmania. Hydrocotyle simulans resembles both H. plebeya and H. pterocarpa, in having orbicular-cordate to reniform leaves, hydathodes along leaf lamina margins and broadly ovate to orbicular stipules with entire margins. It differs from these taxa by a combination of characters, such as reflexed white trichomes congregated at the petiole apices, ovate floral bracts with basal lobes, subsessile flowers with pale to dark crimson petals and lenticular mericarps with minutely rugulose surfaces when mature.

Notes on a newly discovered population of the Pygmy Copperhead Austrelaps labialis (Jan, 1859) in the Adelaide Hills, South Australia

2021 ◽  
Author(s):  
Shawn Scott ◽  
Richard Biffin
Keyword(s):  
South Australia ◽  
Vulnerable Population ◽  
Isolated Population ◽  
Allopatric Population ◽  
Dense Vegetation ◽  
The North ◽  
North Eastern ◽  
Remnant Habitat

ABSTRACT The Pygmy Copperhead Austrelaps labialis is South Australia’s only endemic snake, being native to the Adelaide Mount Lofty Ranges and Fleurieu Peninsula; with an additional allopatric population on Kangaroo Island. Within the AMLR, it inhabits stringybark forests and adjacent dense vegetation, occupying a total area of ~150 km2. Here, we document a newly discovered and seemingly isolated population at the north-eastern extent of its known mainland distribution. We visited Lobethal Bushland Park from 2013–2018 and observed snakes of varying age and size, while documenting their ecology and behaviour. In late 2019, the site was decimated by catastrophic wildfire and its persistence here remains unknown. Alongside descriptions of our observations, we suggest measures for the conservation of this vulnerable population in its remnant habitat if it has survived the impacts of wildfire.

Margarite from the Olary Province of South Australia

1979 ◽  
Vol 43 (327) ◽  
pp. 433-435 ◽  
Author(s):  
Graham S. Teale
Keyword(s):  
Solid Solution ◽  
South Australia ◽  
Rock Matrix ◽  
The North ◽  
Broken Hill ◽  
A Value ◽  
Lower Proterozoic ◽  
Free Quartz ◽  
North Eastern ◽  
Tectonothermal Event

SynopsisIn Lower Proterozoic rocks of the Olary Province of South Australia margarite occurs in conjunction with sodic muscovite, pseudomorphing chiastolitic andalusite in graphite-rich schist, and as a pseudomorphic phase in rocks consisting of coarse muscovite together with lesser amounts of chloritoid, sillimanite, staurolite, and corundum. In the latter occurrence the assemblage (muscovite-sillimanite - chloritoid ± staurolite ± corundum) replaces massive andalusite. The margarite and sodic muscovite within the pseudomorphs lack a preferred orientation which suggests that their development was associated with the waning stages of the Palaeozoic Delamerian Orogeny (cf. Glen et al., 1977) which was the last major tectonothermal event in the region.Within the chiastolitic andalusite pseudo-morphs, equal proportions of margarite and sodic muscovite are separated from the rock matrix by a rim of coarser-grained muscovite, which has developed at the pseudomorph margins. A suggested reaction for the development of margarite is 10Al2SiO5+1.7Ca2++1.2K++Na++10H2O⇄(Ca1.6Na0.4)Al4(Si4Al4O20)(OH)3.6+(K1.2Na0.6Ca0.1)Al4(Si6Al20O20)(OH)4+6Al3++12.4OH−.The excess aluminium and hydroxyl ions from the above reaction leave the pseudomorph system but probably react with free quartz and more K+ ions to produce the muscovite fringe. 6SiO2+2K++6Al3++12OH−⇄K2Al4(Si6Al2O20)(OH)4+8H+.The above reactions are pertinent only for margarite and sodic muscovite produced by the pseudomorphism of chiastolitic andalusite.Margarite and sodic muscovite in the muscovite- chloritoid - sillimanite ± staurolite ± corundum rocks replace coarser-grained (up to 1 mm) muscovite, sillimanite, corundum, and chloritoid; staurolite is unaffected. The coarse muscovite of the earlier pseudomorphic assemblage contains 7–16 mole % paragonite in solid solution whereas the sodic muscovite assocated with margarite contains 22–33 mole% paragonite in solid solution. Margarite contains negligible muscovite but substantial (17–26 mole%) paragonite in solid solution. The phases plagioclase and paragonite were not detected in any of the investigated samples. Staurolite has an Mg/(Mg+Fe) value of 0.21 and associated chloritoid a value of 0.20.It is possible that much of the previously described sericitic alteration of andalusite (cf. D'arcy, 1977) within schists of the north-eastern Willyama Complex (north of Broken Hill) involves the production of margarite.

scholarly journals Seasonal changes in phytoplankton on the north-eastern shelf of Kangaroo Island (South Australia) in 2012 and 2013

Oceanologia ◽  
2015 ◽  
Vol 57 (3) ◽  
pp. 251-262 ◽  
Author(s):  
Sergio Balzano ◽  
Amanda V. Ellis ◽  
Charlotte Le Lan ◽  
Sophie C. Leterme
Keyword(s):  
Seasonal Changes ◽  
South Australia ◽  
The North ◽  
North Eastern ◽  
Eastern Shelf

Additional records of small mammals in northern South Australia

2011 ◽  
Vol 33 (1) ◽  
pp. 68 ◽  
Author(s):  
B. Allen ◽  
J. L. Read ◽  
G. Medlin
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Large Scale ◽  
South Australia ◽  
Isolated Population ◽  
Research Project ◽  
The North ◽  
North Eastern ◽  
The Status ◽  
Prey Remains

Analysis of prey remains found in predator scats is a valuable tool for assessing the distribution and status of small mammal populations. As part of a large-scale dingo research project in northern South Australia, the prey remains found in 1845 dingo scats were analysed. A range of species were identified as expected, though, of particular interest, additional records of Rattus villosissimus, Notomys fuscus and Pseudomys australis were obtained. Our R. villosissimus records confirm the contemporary range of this species in the north-eastern pastoral zone, while our N. fuscus records support other recent records of this species in the same area. Our P. australis record indicates that an isolated population of this species exists in the Strzelecki Desert, ~400 km east of the nearest known population. The status of these populations remains unknown, including the risk of dingo predation to them.

Comparative foraging preferences of the greater stick-nest rat Leporillus conditor and the European rabbit Oryctolagus cuniculus: implications for regeneration of arid lands.

2003 ◽  
Vol 25 (2) ◽  
pp. 135 ◽  
Author(s):  
SA Ryan ◽  
KE Moseby ◽  
DC Paton
Keyword(s):  
Plant Species ◽  
Oryctolagus Cuniculus ◽  
Arid Zone ◽  
South Australia ◽  
High Water ◽  
European Rabbit ◽  
High Water Content ◽  
Shrub Species ◽  
Foraging Preferences ◽  
Acacia Aneura

Dietary preferences of the greater stick-nest rat (Leporillus conditor) and the European rabbit (Oryctolagus cuniculus) were compared using cafeteria trials and direct observations. Despite overlap, these species exhibited differences in dietary preference. L. conditor showed a strong preference for chenopod shrub species and other plant species with a high water content including Gunniopsis quadrifida and Calandrinia remota. L. conditor also preferred female bladder saltbush (Atriplex vesicaria) foliage to male. O. cuniculus ate a greater selection of plant species in most trials with their most preferred species including mulga (Acacia aneura), Salsola kali and Calandrinia remota. Both O. cuniculus and L. conditor preferred seedlings of perennial species to adult cuttings. L. conditor has recently been re-introduced to a 14 km� O. cuniculus, cat (Felis catus) and red fox (Vulpes vulpes) proof exclosure in the arid zone of South Australia. The re-introduction of this herbivore and the removal of exotic herbivores may change the vegetation structure and composition within the exclosure by restricting growth of some succulent chenopod species but allowing the regeneration of tall shrub species such as Acacia aneura which are usually limited by O. cuniculus grazing.

Discussion on “The grinding wheel and production” at the North-Eastern Section of the Institution

1942 ◽  
Vol 21 (8) ◽  
pp. 315
Author(s):  
Bowen ◽  
Vickery ◽  
Buchanan ◽  
Swallow ◽  
Perks ◽  
...  
Keyword(s):  
Grinding Wheel ◽  
The North ◽  
North Eastern

The influence of submesoscale eddies on hydrochemical parameters and structural and functional characteristics of phytoplankton in the north-eastern part of the Black Sea

2019 ◽  
pp. 24-40
Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  
Keyword(s):  
Anticyclonic Eddy ◽  
The Black Sea ◽  
Hydrochemical Parameters ◽  
North East ◽  
The North ◽  
Seasonal Thermocline ◽  
North Eastern ◽  
Quantitative Indicators ◽  
The City ◽  
North Eastern Part

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.

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