From estrangement to a sense of place …

Maggie MacKellar in her book Core of my Heart, my Country writes 'What is sense of place? Why is relationship with place so fundamental to our identity as individuals and as communities?' MacKellar rightly acknowledges that 'A sense of place is a complex connection between land and self. Place is both inside and outside; it takes us beyond ourselves, yet allows us to make sense of ourselves. Attachments to place are born into us, but they are also formed through movement, through labour, through words.' My mother Maria Radzimirski-Herzog considered herself truly Swiss and thoroughly Australian. Through one migrant's story this paper explores something of the complex intertwining of place, memory and identity. It grapples with the notion of belonging to one's country of birth and one's adopted country via a rich understanding of place. In Maria's case, place becomes inextricably bound with who she became as a person. In the early 1940s, Maria explored Switzerland on bike and on foot during war-time restrictions on cars and she came to know it intimately. She photographed the land and the mountains; she documented her journeys. Spirn writes perceptively that 'Significance does not depend on human perception or imagination alone.' For Maria significance was, to use Spirn's words, 'there to be discovered, inherent and ascribed, shaped by what senses perceive, what instinct and experience read as significant, what minds know'. For Maria, Landscape was not 'mere scenery'. The ability to see, to listen, to be present in place, stood her in good stead in her adopted country, Australia. Maria called place into being for her children: through her lived experiences, her memories, her story telling, through language, traditions and history, Maria shared her Swiss identity with her children. But imperceptibly she also taught them how to understand her new homeland Australia, their birth country. How did Maria become Australian? Was that her creative response to exile from Switzerland? How did she come to feel at home in both countries, to understand both places? How did they seep into her and she into them? Through my own research on place I have discovered that assessing 'sense of place' is not an exact science but a creative analysis of the attributes of a place. The methodology I have adopted to explore the complex interrelationships between place, memory and identity allows recovery and reclamation, rediscovery, juxtaposing the subjective and the objective, the co-presence of different evidence. This paper draws on place research, on personal papers, letters and photographs, and the author's own experiences and memories. Through story and narrative it interweaves autobiography and biography with theoretical scholarship, to illuminate one migrant's journey from estrangement to a sense of place in her adopted country, Australia.

Habitat selection and energetics of the fiddler crab (Uca tangeri)

We tried to unravel the possible links between the skewed predation risk in Uca tangeri (where large individuals are more at risk from avian predators) and size-dependent changes in the physiology and habitat choice of this fiddler crab species. Over a transect running from low to high in the tidal zone of a beach in Mauritania, the temperature profile at various depths in the substrate, the water-table level of seep water, salt concentration of seep water, depth of the aerobic level, operative temperatures on the surface, and size distribution of crabs were assessed. In addition, resting metabolic rates, Q10 and thermal and starvation tolerances were estimated. Going from low to high in the tidal zone, crab size and burrow depth increased. At the preferred burrowing depth, microclimatological conditions appeared to be equally favourable at all sites. At the surface, conditions were more favourable low in the tidal zone, where also food availability is sufficient to enable small crabs to forage in the vicinity of their burrows. Large crabs have higher energy requirements and are thereby forced to forage in flocks low in the tidal zone where food is probably more abundant. Low in the tidal zone, digging deeply is impossible as the aerobic layer is rather thin. Large crabs prefer living high in the tidal zone as (1) deep burrows ensure better protection against predators, (2) more time is available for digging holes and (3) the substrate is better suited for reproduction. Energy reserves in late summer ensured an average of 34 days of survival. It is argued that the allotment of energy to growth must be considerable even in reproducing animals; the rewards of growth being the disproportional increase in reproductive output with size.

Biochemical responses to ocean acidification contrast between tropical corals with high and low abundances at volcanic carbon dioxide seeps

At two natural volcanic seeps in Papua New Guinea, the partial pressure of carbon dioxide (pCO2) in the seawater is consistent with projections for 2100. Here, the cover of massive scleractinian corals Porites spp. is twice as high at elevated compared with ambient pCO2, while that of branching corals such as Acropora millepora is greater than twofold reduced. To assess the underlying mechanisms for such community shifts under long-term exposure to elevated pCO2, biochemical parameters related to tissue biomass, energy storage, pigmentation, cell protection, and cell damage were compared between Porites spp. and A. millepora from control (mean pHtotal = 8.1, pCO2 = 323 µatm) and CO2 seep sites (mean pHtotal = 7.8, pCO2 = 803 µatm) each at two reefs. In Porites spp., only one of the biochemical parameters investigated (the ratio of photoprotective to light-harvesting pigments) responded to pCO2, while tissue biomass, total lipids, total proteins, and some pigments differed between the two reefs, possibly reflecting differences in food availability. Furthermore, some fatty acids showed pCO2 –reef interactions. In A. millepora, most pigments investigated were reduced at elevated pCO2, while other parameters (e.g. tissue biomass, total proteins, total lipids, protein carbonyls, some fatty acids and pigments) differed between reefs or showed pCO2–reef interactions. Tissue biomass, total lipids, and cell-protective capacities were distinctly higher in Porites spp. than in A. millepora, indicating higher resistance to environmental stress in massive Porites. However, our data suggest that important biochemical measures remain relatively unaffected in these two coral species in response to elevated pCO2 up to 800 µatm, with most responses being smaller than differences between species and locations, and also when compared with responses to other environmental stressors such as ocean warming.