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The spatial distribution of calving habitat of humpback whales ( Megaptera novaeangliae ) has been understood as confined to warm, low latitude waters. The need for females to reach such habitats to give birth and provide early maternal care underpins the dominant theories on humpback whale migration. In Australia, calving habitat is accepted to be distributed no further south than 23-28°S and is generally presumed not to occu...
Biophysical predictors of spatial variation in abundance and population dynamics of an invasive decapodNARA Subscribed
Population dynamics of invasive species and their impacts on native communities vary substantially geographically and in different environmental contexts. Therefore, effective management of invasive species requires understanding how habitat characteristics, anthropogenic effects, or other perturbations can influence their abundance and impacts on native communities at multiple spatial and temporal scales. This is particularly...
Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
δ 56 Fe in seabird guano reveals extensive recycling of iron in the Southern Ocean ecosystemNARA Subscribed
Availability of iron limits productivity in the Southern Ocean where vast regions of high‐nitrogen low‐chlorophyll conditions are punctuated by hotspots of production surrounding the subAntarctic islands. Here, we compare patterns in accumulation of iron, as indicated by [Fe] and Fe : C (from Wing et al. ), with proxies for uptake of iron within food webs, as indicated by Fe : Al and δ 56 Fe within the subAntarctic Auckland Is...
Measuring Douglas-Fir Crown Growth with Multitemporal LiDARNARA Subscribed
Patterns in the δ13C and δ15N signature of Ulva pertusa: Interaction between physical gradients and nutrient source poolsNARA Subscribed
Field surveys and laboratory experiments were used to investigate the influence of the physical environment on variability in δ 13 C and δ 15 N signatures of Ulva pertusa , an abundant macroalgae inhabiting the low salinity layer (LSL) of Doubtful Sound, a New Zealand fjord. Field surveys revealed significant spatial variability in δ 13 C (‐18% to ‐12%) and δ 15 N (0% to 6%). δ 13 C was enriched at high irradiance sites and de...
Macroinvertebrate diet in intertidal seagrass and sandflat communities: A study using C, N, and S stable isotopesNARA Subscribed
Most seagrass community food‐web studies using stable isotopes have been carried out in subtidal habitats during one sampling event. We used C, N, and S stable isotopes to characterise the diet of the dominant macroinvertebrates found in intertidal Zostera capricorni and sandflat communities of southern New Zealand in late summer and winter. The range of ä 13 C and ä 34 S values for Z. capricorni was wide (>5‰), which highligh...
SMART-1 after lunar capture: First results and perspectivesNARA Subscribed
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichmentNARA Subscribed
Iron supply is thought to regulate primary production in high nitrate, low chlorophyll (HNLC) regions of the sea in both the past and the present. A critical aspect of this relationship is acquisition of iron (Fe) by phytoplankton, which occurs through a complex series of extracellular reactions that are influenced by Fe chemistry and speciation. During the first in situ mesoscale Fe‐enrichment experiment in the Southern Ocean...
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