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Images, eqnz.chch.2010

Photos taken in New Brighton on March 31 following the February 22 earthquake. File reference: CCL-2011-03-25-New Brighton-After-The-Earthquake-NB Parkland 007 From the collection of Christchurch City Libraries

Images, eqnz.chch.2010

Neighbours across the river showing earthquake damage. Hotel Grand Chancellor in the background. File reference: CCL-2011-08-12-CanterburyPublic Library pre-demolition-044 From the collection of Christchurch City Libraries.

Images, eqnz.chch.2010

Propped up neighbours but life goes one. Photos taken in Lyttelton Library on May 24, 2011 following the February 22 earthquake. File reference: CCL-2011-05-24-Lyttelton-After-The-Earthquake-IMG_15 From the collection of Christchurch City Libraries

Images, UC QuakeStudies

A damaged driveway bridge over a stream has visibly moved, scraping up some of the driveway. The photographer comments, "Our neighbour Pam Shadbolt's house, immediately behind our house, on the bank of Dudley Creek. The bridge has broken free from its foundations".

Images, UC QuakeStudies

A photograph captioned by BeckerFraserPhotos, "An old advertisments which was revealed on a building on Lichfield Street when its neighbour was demolished. The advertisement reads 'New Zealand Candle Co Ltd.' and then adds 'Five Medal, British Sperm', which are brands of candle".

Images, UC QuakeStudies

A group of residents stand talking on the footpath beside River Road. The photographer comments, "Our neighbours were mostly already displaced by the Sep 4 2010 quakes. We all happened to arrive at the same time, so we had a good chat. From L-R; Deidre Crichton (389), Julie and Philip Cheyne (391), Marike Begg (363), Susannah and Kim Collins (383), Andy Corbin (389)".

Images, UC QuakeStudies

Damage to the garden of a house in Richmond. Liquefaction is visible among the plants and on the driveway, and the driveway is badly cracked. The photographer comments, "These photos show our old house in River Rd. Water and silt have flattened the long grass in the back garden. The growth right of centre is suckers growing from the stump of a prunus tree we had felled last year. The section of fence between us and our neighbour fell down in the Sep 4 quake".

Images, UC QuakeStudies

Damage to a residential property in Richmond. The brick wall of the garage has collapse inward, and the roof fallen in on top of it. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. The neighbours behind us used the kayak to get in to their house - it's flooded by Dudley Creek which runs behind the block, plus major liquefaction. Our old garage provides a good spot to park it".

Research Papers, Lincoln University

Tree mortality is a fundamental process governing forest dynamics, but understanding tree mortality patterns is challenging because large, long-term datasets are required. Describing size-specific mortality patterns can be especially difficult, due to few trees in larger size classes. We used permanent plot data from Nothofagus solandri var. cliffortioides (mountain beech) forest on the eastern slopes of the Southern Alps, New Zealand, where the fates of trees on 250 plots of 0.04 ha were followed, to examine: (1) patterns of size-specific mortality over three consecutive periods spanning 30 years, each characterised by different disturbance, and (2) the strength and direction of neighbourhood crowding effects on sizespecific mortality rates. We found that the size-specific mortality function was U-shaped over the 30-year period as well as within two shorter periods characterised by small-scale pinhole beetle and windthrow disturbance. During a third period, characterised by earthquake disturbance, tree mortality was less size dependent. Small trees (,20 cm in diameter) were more likely to die, in all three periods, if surrounded by a high basal area of larger neighbours, suggesting that sizeasymmetric competition for light was a major cause of mortality. In contrast, large trees ($20 cm in diameter) were more likely to die in the first period if they had few neighbours, indicating that positive crowding effects were sometimes important for survival of large trees. Overall our results suggest that temporal variability in size-specific mortality patterns, and positive interactions between large trees, may sometimes need to be incorporated into models of forest dynamics.