David J. Ayre

Isotopic niche of Centrostephanus rodgersii from barrens overlap with those from macroalgal forests in SE Australia

Jeremy Karl Day, Vincent Raoult, Nathan A. Knott, David J. Ayre et autres

Sea urchin ‘barrens’ are thought to offer fewer food resources than macroalgal habitats. As such, sea urchins from barrens are expected to have a smaller isotopic niche compared to those in dense macroalgal forests. Sea urchin isotopic niches in macroalgal forests are …

Spiny lobster predation of barrens‐forming sea urchins is not limited by body size, but may be overstated

Jeremy Karl Day, Nathan A. Knott, Daniel S. Swadling, David J. Ayre et autres

Abstract Worldwide, lobsters are considered key predators that control urchin populations. It has been widely reported that lobster size plays a significant role in the size of urchins they feed on, as does the size of the urchin. Generally, it is thought …

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Effects of habitat on predation of ecologically important sea urchin species on east coast Australian temperate reefs in tethering experiments

JA Day, Nathan A. Knott, David J. Ayre, Maria Byrne

The expansion and persistence of urchin-dominated habitats at the expense of macroalgal cover has long been of interest in marine ecology. Macroalgal habitats are considered to harbor a high abundance of urchin predators that protect these habitats from grazing. We tested this …

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Genetic assessment of the value of restoration planting within an endangered eucalypt woodland

Natalie L. Rosser, Anthony M. Quinton, Huw Davey, David J. Ayre et autres

Abstract Assessment of woodland restoration often focusses on stand demographics, but genetic factors likely influence long-term stand viability. We examined the genetic composition of Yellow Box (Eucalyptus melliodora) trees in endangered Box-Gum Grassy Woodland in SE Australia, some 30 years after planting …

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Non‐lethal sampling does not misrepresent trophic level or dietary sources for Sagmariasus verreauxi (eastern rock lobster)

Jeremy Karl Day, Nathan A. Knott, Daniel S. Swadling, David J. Ayre et autres

Rationale Isotope analysis can be used to investigate the diets of predators based on assimilation of nitrogen and carbon isotopes from prey. Recent work has shown that tissues taken from legs, antennae or abdomen of lobsters can give different indications of diet, …

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High adult mortality and failure of recruitment in a population of Banksia spinulosa following high‐intensity fire

Robert J. Whelan, David J. Ayre

ABSTRACT Serotinous plants that both release seed and resprout after fire are thought to be resistant to wildfires within the range of intensities that have been experienced up until now. However, the frequency and scale of intense wildfires is increasing under climate …

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Dietary analysis and mesocosm feeding trials confirm the eastern rock lobster (

Jeremy Karl Day, Daniel S. Swadling, David J. Ayre

Worldwide, lobsters are considered important predators of macroalgae-consuming urchin species, but this has not been tested for Australia’s common lobster, the eastern rock lobster (Sagmariasus verreauxi). We predicted that the abundant urchins, the long-spined urchin (Centrostephanus rodgersii) and the short-spined urchin (Heliocidaris …

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Low Genetic Differentiation despite Fragmentation in an Endangered Fire-Sensitive Shrub

David J. Ayre, Alison Haynes, David Gregory

Premise of research. Worldwide, fire-sensitive shrubs have an important but underresearched life history, and in Australia they are threatened by anthropogenic changes to fire regimes and habitat loss. Typically, adults are killed by fire, but they can also senesce and die if …

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Long inter‐fire intervals do not guarantee a large seed bank in a serotinous shrub (Banksia spinulosa Sm.)

Robert J. Whelan, David J. Ayre

Abstract It is often assumed that long‐lived woody perennials with canopy‐stored seed banks steadily accumulate seeds over time since fire. Trends in flowering and fruiting have usually been inferred from synchronic studies of sites of different post‐fire ages or counting stored seeds …

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Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia

Cairo N. Forrest, David G. Roberts, Andrew J. Denham, David J. Ayre

Clonality may provide reproductive assurance for many threatened plants while limiting sexual reproductive success either through energetic tradeoffs or because clones are self-incompatible. Most stands of the Australian arid-zone plant Acacia carneorum, flower annually but low seed set and an absence of …

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Do mass flowering agricultural species affect the pollination of Australian native plants through localised depletion of pollinators or pollinator spillover effects?

Amy‐Marie Gilpin, Andrew J. Denham, David J. Ayre

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Are there magnet plants in Australian ecosystems: Pollinator visits to neighbouring plants are not affected by proximity to mass flowering plants

Amy‐Marie Gilpin, Andrew J. Denham, David J. Ayre

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