Overwintering sites of <i>Chrysophtharta bimaculata</i> (Olivier) (Coleoptera: Chrysomelidae) in commercially managed <i>Eucalyptus obliqua</i> forests

Clarke, A. R.; Shohet, D.; Patel, V. S.; Madden, J. L.

doi:10.1111/j.1440-6055.1998.tb01562.x

Cited by 7 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most individuals of non-saproxylic species sampled are presumed to have been trapped in overwintering-or aestivating-sites when the eclectors were first closed. This is almost certainly the case for the most numerous species in this category, the eucalypt leaf-beetle Paropsisterna bimaculata, which is known to overwinter amongst fissured bark as well as under logs (Clarke et al 1998).…”

Section: Trophic Structurementioning

confidence: 99%

A decade of change in the saproxylic beetle fauna of eucalypt logs in the Warra long-term log-decay experiment, Tasmania. 1. Description of the fauna and seasonality patterns

Grove

Forster

2011

Biodivers Conserv

View full text Add to dashboard Cite

The first decade of sequential and cyclical sampling of saproxylic beetles by means of eclector traps on 12 freshly-felled Eucalyptus obliqua logs at Warra, Tasmania has allowed documentation of a taxonomically and ecologically diverse fauna present in such logs in their early decompositional state. About half of all species are apparently undescribed-a much higher proportion than in most temperate regions. The distribution of individuals among species is typically skewed, with most species being rare and few being common. Neither obligately nor facultatively saproxylic beetles dominate the fauna, but predators predominate over other larval feeding guilds, and-in accordance with ecological theory for early successional habitats-winged species predominate over functionally flightless species. There is some suggestion that trophic structure changed over the period of the study, with the proportion of functionally flightless species increasing. The fauna shows strong seasonality. While the summer months represent the peak of occurrence for most species (in keeping with the cool-temperate climate), every month has its own particular complement of species, such that a strong seasonal cycle in assemblage composition is apparent throughout the year. The timings of emergence peaks vary among the years represented in this study by up to 2 months, with the year of latest emergence corresponding to that with the lowest mean annual maximum temperature; no signature of climate change is evident in the data-set.

show abstract

Section: Trophic Structurementioning

confidence: 99%

A decade of change in the saproxylic beetle fauna of eucalypt logs in the Warra long-term log-decay experiment, Tasmania. 1. Description of the fauna and seasonality patterns

Grove

Forster

2011

Biodivers Conserv

View full text Add to dashboard Cite

show abstract

“…Beetles classified as tourists in our study include those known to overwinter on tree ferns, such as the eucalypt‐feeding chrysomelid Paropsisterna bimaculata (Clarke et al . 1998) and saproxylic species associated with Eucalyptus logs, such as certain cryptorhynchine weevils (Grove & Bashford 2003).…”

Section: Discussionmentioning

confidence: 99%

Beetle communities associated with the tree fernDicksonia antarcticaLabill. in Tasmania

Fountain-Jones

McQuillan

Grove

2012

Australian Journal of Entomology

View full text Add to dashboard Cite

Tree ferns are a conspicuous element of many wet forests in Australia, and in increasing demand in export markets, but little is known about their beetle fauna. The tree fern Dicksonia antarctica Labill. was sampled over four seasons at four sites in Tasmania. A total of 108 species of beetles, representing 35 families, were collected from three discrete microhabitats on 80 individual tree ferns. Beetle numbers were highest in the crown litter, then live fronds and least from the trunk. Curculionoids were the most diverse and abundant group of beetles and an anthribid genus, Xynotropis Blackburn, was most numerous. The crown litter was numerically dominated by species from four families, Anthribidae, Leiodidae, Ptiliidae and Staphylinidae. Two other families, Latridiidae and Coccinellidae, were most abundant on the live fronds, while Tenebrionidae, Staphylinidae and Anthribidae were common on the trunks. Predators, followed by fungivores contributed the highest proportion of species richness, however fungivores, spore-feeders and detritivores were most abundant as individuals. Despite a large foliar biomass, herbivores were notably few in numbers and diversity. The beetle assemblage on each of the three microhabitats associated with tree ferns was distinctive and characterised by sets of species that displayed some degree of geographical variation. Indicator analysis revealed that 13 species were broadly characteristic of site-by-microhabitat combinations. For exported tree ferns, the beetle fauna appears to be low in pest potential.

show abstract

“…The life-cycle consists of an overwintering phase in which adult beetles shelter under bark, in cracks and crevices of old trees and stags (Greaves 1966) and in the leaf clumps of Gahnia grandis (Clarke et al 1998b). During the overwintering stage, beetles are brown-red in colour.…”

Section: An Introduction To the Paropsines And Chrysophtharta Bimaculatamentioning

confidence: 99%

Oviposition site selection by the eucalypt herbivore Chrysophtharta bimaculata (Olivier) (Coleoptera: Chrysomelidae) and the implications for larval establishment

2001

Australian Journal of Entomology

View full text Add to dashboard Cite

Chrysophtharta bimaculata (Olivier) is a chrysomelid folivore of several Eucalyptus species, including E. (Monocalyptus) regnans, E. (M) delegatensis and E. (Symphyomyrtus) nitens. Both adults and larvae feed on the same tree species and eggs are laid directly onto host foliage. Adults feed and oviposit in aggregated swarms and, as a result, subsequent larval feeding may cause severe host tree defoliation and larval resource depletion. Further, previous research on a related chrysomelid has shown that factors associated with changing leaf age ( eg variation in toughness and nitrogen concentration) can seriously impact on larval survival.Because oviposition site selection is likely to be of fundamental importance to larval survival in C. bimaculata, the factors affecting oviposition site selection and the impact that the selected site had on subsequent larval establishment were chosen as the primary foci of this thesis.Research followed three main thrusts. In the first (Chapters 2-6), I documented exactly where C. bimaculata placed its eggs, both under natural and controlled conditions, from the individual leaf up to the level of tree species. Manipulative and correlative studies were used to determine what factors might affect site selection. C. bimaculata prefers to oviposit near the leaf tip and although there was no evidence that conspecific egg batches directly deter ovipositing beetles, leaves with egg batches on their tip are less preferred for oviposition. Other factors demonstrated to negatively influence oviposition site selection between leaves were increasing leaf toughness and conspecific beetle feeding damage. By altering leaf position it was demonstrated that leaf toughness, rather than leaf position, influenced C. bimaculata oviposition preference .. In chapter 5, I document the effects of egg batch placement on larval establishment. Wild, aggregated populations regularly deposit approximately one-third of egg batches on mature leaves unsuitable for neonate establishment. However, neonates had the ability to migrate to suitable leaves and establish with no increase in IV I would like to thank the following people and institutions for their contributions to my studies. Firstly, my supervisor Dr. Anthony Clarke for the great amount of time spent critically reviewing my experimental work and written material. His encouragement was very motivational and greatly appreciated. I would also like to thank my other supervisor Dr. John Madden for his suggestions, corrections and encouragement during my write up.I would like to thank the FFIC for the scholarship allowing me to conduct research into the interesting area of insect-plant interactions and the CRC for Sustainable Production Forestry for the use of office space and equipment, laboratory, glasshouse facilities and other equipment purchased for my research work. I would also like to thank Forestry Tasmania and ANM for providing information valuable to my work and for access to plantation and regeneration areas, North Forest Products for the use of clo...

show abstract

Overwintering sites of Chrysophtharta bimaculata (Olivier) (Coleoptera: Chrysomelidae) in commercially managed Eucalyptus obliqua forests

Cited by 7 publications

References 14 publications

A decade of change in the saproxylic beetle fauna of eucalypt logs in the Warra long-term log-decay experiment, Tasmania. 1. Description of the fauna and seasonality patterns

A decade of change in the saproxylic beetle fauna of eucalypt logs in the Warra long-term log-decay experiment, Tasmania. 1. Description of the fauna and seasonality patterns

Beetle communities associated with the tree fernDicksonia antarcticaLabill. in Tasmania

Oviposition site selection by the eucalypt herbivore Chrysophtharta bimaculata (Olivier) (Coleoptera: Chrysomelidae) and the implications for larval establishment

Contact Info

Product

Resources

About