Portrait of the engaged couple Albert Meyerhof and Dina Loebenberg. Portraits Couples

Digital Image

Portrait of Albert Meyerhof called "Nuck"; Israel.

Photo taken in Israel.

Studio portrait of Josef Molling with unidentified man; Heidelberg, Germany.

right: Joseph Molling sitting; left: unknown man standing

Portrait of Josef with his son Peter Molling.

Badly faded picture of Peter Molling, left, and his father, Josef Molling

Grave of Josef Molling; Germany.

Josef Molling committed suicide. He had financial problems, either embezzelment from the Prussian State Lottery or over an aircraft plant.

Resilience of a high-conservation-value, semi-arid grassland on fertile clay soils to burning, mowing and ploughing.

In grassland reserves, managed disturbance is often necessary to maintain plant species diversity. We carried out experiments to determine the impact of fire, kangaroo grazing, mowing and disc ploughing on grassland species richness and composition in a nature reserve in semi-arid eastern Australia. Vegetation response was influenced by winter-spring drought after establishment of the experiments, but moderate rainfall followed in late summer-autumn. Species composition varied greatly between sampling times, and the variability due to rainfall differences between seasons and years was greater than the effects of fire, kangaroo grazing, mowing or disc ploughing. In the fire experiment, species richness and composition recovered more rapidly after spring than autumn burning. Species richness and composition were similar to control sites within 12 months of burning and mowing, suggesting that removal of the dominant grass canopy is unnecessary to enhance plant diversity. Two fires (separated by 3 years) and post-fire kangaroo grazing had only minor influence on species richness and composition. Even disc ploughing caused only a small reduction in native richness. The minor impact of ploughing was explained by the small areas that were ploughed, the once-off nature of the treatment, and the high degree of natural movement and cracking in these shrink-swell soils. Recovery of the composition and richness of these grasslands was rapid because of the high proportion of perennial species that resprout vegetatively after fire and mowing. There appears to be little conservation benefit from fire, mowing or ploughing ungrazed areas, as we could identify no native plant species dependent on frequent disturbance for persistence in this grassland community. However, the ability of the Astrebla- and Dichanthium-dominated grasslands to recover quickly after disturbance, given favourable seasonal conditions, suggests that they are well adapted to natural disturbances (e.g. droughts, fire, flooding and native grazing).

Technical highlights: Invasive plant and animal research 2008-09

Technical highlights 2008–09, with detailed progress reports on the latest invasive plant and animal research undertaken by Biosecurity Queensland, a service unit of the Department of Employment, Economic Development and Innovation.

Studio portrait of the women of the Oppenheimer family.

l-r: Thekla Oppenheimer-Benedick, Jenny Oppenheimer-Frank, Fanny Oppenheimer and Adele Oppenheimer-Nathan

Studio portrait of the women of the Oppenheimer family.

l-r: Sisters Adele Oppenheimer-Nathan, Thekla Oppenheimer-Benedick, Jenny Oppenheimer-Frank and their mother Fanny Oppenheimer

Studio portrait of Josef Molling with unidentified man; Heidelberg, Germany.

right: Joseph Molling sitting; left: unknown man standing

Portrait of the engaged couple Albert Meyerhof and Dina Loebenberg. Portraits Couples

Digital Image

Portrait of Albert Meyerhof called "Nuck"; Israel.

Photo taken in Israel.

Studio portrait of Josef Molling with unidentified man; Heidelberg, Germany.

right: Joseph Molling sitting; left: unknown man standing

Portrait of Josef with his son Peter Molling.

Badly faded picture of Peter Molling, left, and his father, Josef Molling

Grave of Josef Molling; Germany.

Josef Molling committed suicide. He had financial problems, either embezzelment from the Prussian State Lottery or over an aircraft plant.