Long-term flowering patterns of melliferous Eucalyptus (Myrtaceae) species

Birtchnell, Melanie J.; Gibson, Maria

doi:10.1071/bt05160

Cited by 32 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tree condition, as well as many other weather and habitat variables, can alter Eucalyptus reproduction (Setterfield and Williams 1996;Law et al 2000;Birtchnell and Gibson 2006;Semple et al 2007). We have 485…”

Section: Resultsmentioning

confidence: 99%

Living (and reproducing) on the edge: reproductive phenology is impacted by rainfall and canopy decline in a Mediterranean eucalypt

et al. 2016

View full text Add to dashboard Cite

Many of the worlds' forests and woodlands are currently showing symptoms of declining condition due to a range of factors, including changing climatic conditions, drought, and insect herbivory. Altered abiotic and 25 biotic conditions can influence the condition of trees which can, in turn, affect tree reproductive cycles.However, the potential impact of tree decline on reproductive cycles has rarely been examined. This study investigated the influence of canopy condition on the reproductive cycle of Eucalyptus wandoo in southwestern Australia. Canopy and seed trap monitoring were used to assess bud production, flowering, fruiting and seed fall over 12 months at 24 sites across two locations (Dryandra Woodland and Wandoo 30 Conservation Park). Time since last fire, rainfall, ambient temperatures and the condition of individual trees were recorded. We found that bud production, flowering and fruiting was correlated with tree condition:healthier trees were generally associated with higher reproductive effort. Time since last fire was also strongly related to the reproductive efforts at both locations. Declining annual rainfall and increased temperatures also an impact on reproduction, made evident by the aborted flowering in Dryandra Woodland. 35Decline in tree condition, coupled with changes in climate, have major implications for flowering phenology of this species and have the potential to alter reproductive effort, recruitment, and future population dynamics. Consideration of these issues should be incorporated into the conservation management of E.wandoo and similar Eucalypt species. 40

show abstract

Section: Resultsmentioning

confidence: 99%

Living (and reproducing) on the edge: reproductive phenology is impacted by rainfall and canopy decline in a Mediterranean eucalypt

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Eucalyptus flowers survive for between 4 and 18 days and provide a renewable resource during this time (Davis, 1997). Many species flower for periods of more than 3 months (Birtchnell and Gibson, 2006). Although Eucalyptus nectar has the potential to be available almost year round, it is likely to be difficult for ants to defend due to its high spatial dispersion and temporal ephemerality.…”

Section: Ecological Dominance and Arboreal Sugarsmentioning

confidence: 99%

Does the availability of arboreal honeydew determine the prevalence of ecologically dominant ants in restored habitats?

Gibb

Cunningham

2009

Insect. Soc.

View full text Add to dashboard Cite

Ants are extensive users of arboreal sugars, but little is known about how ecological dominance or habitat succession influences this interaction. We investigated how the availability and use of arboreal sugar resources by ants changes across a restoration chronosequence. We surveyed the use and availability of hemipteran honeydew and floral nectar on the two dominant plant genera, Eucalyptus and Acacia, in study sites in south eastern Australia. Sugars used by ants are likely to drive their role as ecosystem engineers, while sugars not used by ants remain available to other organisms. We also tested whether the use of sugars differed between ecologically dominant and nondominant ants; taxa likely to perform different functions in ecosystems. No floral nectar was available on Acacia, but later successional eucalypts supported more floral resources and fewer mutualist hemiptera. Successional stage significantly affected how much sugar remained unexploited by ants, with similar trends for ant use of sugars. Non-dominant ants used mainly floral nectar, while hemipteran honeydew resources were used disproportionately by dominant ants, consistent with the prediction that this group monopolises persistent carbohydrate resources. This pattern was similar across successional stages, but the difference was least in habitats with the greatest availability of floral nectar, suggesting that high sugar availability may reduce the incentive to defend honeydew. Across habitat types, the proportion of dominant ants increased with the availability of hemipteran honeydew. This suggests that honeydew availability may regulate ecological dominance, thus affecting ant-driven ecosystem processes.

show abstract

“…For example, in natural stands of E. regnans, anthesis commenced 13 approximately two weeks earlier at lower altitudes than at high altitudes (Ashton 1975;14 Griffin 1980). Temperature has also been implicated in the site-to-site variation observed in 15 honey-producing eucalypts in south-eastern Australia, as northern (usually warmer) sites 16 often flower earlier than southern sites (Birtchnell and Gibson 2006). 17…”

mentioning

confidence: 99%

Genetic control of flowering time in Eucalyptus globulus ssp. globulus

Jones

Vaillancourt

Potts

2011

Tree Genetics & Genomes

View full text Add to dashboard Cite

1Understanding the factors affecting variation in phenology within a species is important as 2 flowering time constitutes one of the major barriers to gene flow. We studied the genetic and 3 environmental control of flower initiation and anthesis time in E. globulus ssp. globulus. For 4 five years, flower initiation and anthesis were monitored in a seed orchard containing clones 5 of 63 genotypes from four different regions of the species' natural distribution. Anthesis 6 occurred over a long period each year, spanning as much as nine months in 2008. This 7 variation was under strong genetic control with little genotype by year interaction (broad-8 sense heritability, Ĥ 2 =0.78±0.04). There were highly significant differences among regions; 9 anthesis occurred earlier for Furneaux and Tasmania than Strzelecki and Otways each year. 10 Surprisingly though, there was little variation in flower initiation time between regions and 11 genotypes, and this was under weak genetic control (Ĥ 2 =0.06±0.05). The average anthesis 12 time in the orchard varied from year to year and there was evidence that heat sum was a 13 major driver of this environmental variation. Anthesis time is controlled by both genetic and 14 environmental factors, with the responses to each being predictable to some extent, and 15 unrelated to the timing of flower initiation. 16 17

show abstract

Long-term flowering patterns of melliferous Eucalyptus (Myrtaceae) species

Cited by 32 publications

References 26 publications

Living (and reproducing) on the edge: reproductive phenology is impacted by rainfall and canopy decline in a Mediterranean eucalypt

Living (and reproducing) on the edge: reproductive phenology is impacted by rainfall and canopy decline in a Mediterranean eucalypt

Does the availability of arboreal honeydew determine the prevalence of ecologically dominant ants in restored habitats?

Genetic control of flowering time in Eucalyptus globulus ssp. globulus

Contact Info

Product

Resources

About