Influence of Gertrude Jekyll in the Adelaide Hills : the landscape of 'Broadlees'

‘Broadlees’ exists as an Adelaide Hills hill-station retreat in Australia, established in the 1920s as a permanent residence for the Waite sisters.1 Typically most large hill-station residences and their accompanying private ‘botanic gardens’ were developed as summer residences from the summer onslaught of the Adelaide Plains, but the Waite sisters saw ‘Broadlees’ as their permanent residence. Further, although the design of the residence was not important in the eyes of Misses Eva and Lily Waite, it was the gardens of the property that were their real passion. This article reviews the history and development of the ‘Broadlees’ property and in particular the role played by the writings and gardens of Gertrude Jekyll (1843–1932)2 in its design, form and plantings, which remain the most intact and mature Jekyll-inspired landscape in South Australia today. It is a significant, extant Jekyll-influenced garden developed in the 1920s and 1930s in the Adelaide Hills3 that has been little featured in the coffee-table garden profile literature in Australia, and no article has previously been written about the property. It has been profiled in the Australian Home Beautiful and the South Australian Homes & Gardens magazines in 1932 and 1936 respectively, and also has been subject to a recent comparative assessment as to the role and influence of prominent Adelaide garden designer ElsieMarion Cornish (1870–1946).4 Perhaps because of the wishes of the owners who personally developed and sought to maintain the privacy of the gardens and house, subsequent owners have sought to respect this philosophy in their curatorship of the property.5

Habitat fragmentation and landscape change

This chapter begins by summarizing the conceptual approaches used to understand conservation in fragmented landscapes. We then examine the biophysical aspects of landscape change, and how such change affects species and communities, posing two main questions: (i) what are the implications for the patterns of occurrence of species and communities?; and (ii) how does landscape change affect processes that influence the distribution and viability of species and communities. The chapter concludes by identifying the kinds of actions that will enhance the conservation of biota in fragmented landscapes.

Garden & landscape heritage:a crisis of tangible & intangible comprehension and curatorship

The cultural landscape of George Town, Penang, Malaysia, embraces the historic enclave of George Town as well as a range of other significant colonial vestiges adjacent to the entrépôt. Many of these landscapes cannot be isolated from the énclave as they are integral to and part of its cultural mosaic and character. Perhaps the most important are the Penang Hill hill-station landscape and the 'Waterfall‘ Botanic Gardens. The latter is an under-valued 'garden of the empire‘—a garden that significantly underpinned the development and historical and botanical stature of the Singapore Botanic Gardens.This paper reviews the cultural significance of colonial botanic gardens as they were established around the world during the scientific explosion of the late 1800s. It addresses their position within World Heritage listings, and considers the role, significance and importance of the 'Waterfall‘ Botanic Gardens within this context, within the concept of 'cultural landscapes‘, and critiques its absence from the recent World Heritage Listing of the colonial enclaves of Georgetown and Meleka in Malaysia.

A predictive model of avian natal dispersal distance provides prior information for investigating response to landscape change

1. Informative Bayesian priors can improve the precision of estimates in ecological studies or estimate parameters for which little or no information is available. While Bayesian analyses are becoming more popular in ecology, the use of strongly informative priors remains rare, perhaps because examples of informative priors are not readily available in the published literature.
2. Dispersal distance is an important ecological parameter, but is difficult to measure and estimates are scarce. General models that provide informative prior estimates of dispersal distances will therefore be valuable.
3. Using a world-wide data set on birds, we develop a predictive model of median natal dispersal distance that includes body mass, wingspan, sex and feeding guild. This model predicts median dispersal distance well when using the fitted data and an independent test data set, explaining up to 53% of the variation.
4. Using this model, we predict a priori estimates of median dispersal distance for 57 woodland-dependent bird species in northern Victoria, Australia. These estimates are then used to investigate the relationship between dispersal ability and vulnerability to landscape-scale changes in habitat cover and fragmentation.
5. We find evidence that woodland bird species with poor predicted dispersal ability are more vulnerable to habitat fragmentation than those species with longer predicted dispersal distances, thus improving the understanding of this important phenomenon.
6. The value of constructing informative priors from existing information is also demonstrated. When used as informative priors for four example species, predicted dispersal distances reduced the 95% credible intervals of posterior estimates of dispersal distance by 8-19%. Further, should we have wished to collect information on avian dispersal distances and relate it to species' responses to habitat loss and fragmentation, data from 221 individuals across 57 species would have been required to obtain estimates with the same precision as those provided by the general model.