The Subgeneric Composition of Eucalypt Forest Stands in a Region of South-Eastern Australia

Austin, MP; Cunningham, RB; Wood, JT

doi:10.1071/bt9830063

Cited by 17 publications

(11 citation statements)

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“…Co‐dominance of eucalypts from different subgenera is a common pattern known as Pryor's rule (Pryor ). A possible explanation for this pattern is that species from different subgenera are able to differentiate resource use, thereby alleviating competition (Austin, Cunningham & Wood ). Another potential explanation is that species from different subgenera are not able to interbreed (Ellis, Sedgley & Gardner ).…”

Section: Discussionmentioning

confidence: 99%

Understanding co‐occurrence by modelling species simultaneously with a Joint Species Distribution Model (JSDM)

et al. 2014

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Summary 1.A primary goal of ecology is to understand the fundamental processes underlying the geographic distributions of species. Two major strands of ecology -habitat modelling and community ecology -approach this problem differently. Habitat modellers often use species distribution models (SDMs) to quantify the relationship between species' and their environments without considering potential biotic interactions. Community ecologists, on the other hand, tend to focus on biotic interactions and, in observational studies, use co-occurrence patterns to identify ecological processes. Here, we describe a joint species distribution model (JSDM) that integrates these distinct observational approaches by incorporating species co-occurrence data into a SDM. 2. JSDMs estimate distributions of multiple species simultaneously and allow decomposition of species co-occurrence patterns into components describing shared environmental responses and residual patterns of co-occurrence. We provide a general description of the model, a tutorial and code for fitting the model in R. We demonstrate this modelling approach using two case studies: frogs and eucalypt trees in Victoria, Australia. 3. Overall, shared environmental correlations were stronger than residual correlations for both frogs and eucalypts, but there were cases of strong residual correlation. Frog species generally had positive residual correlations, possibly due to the fact these species occurred in similar habitats that were not fully described by the environmental variables included in the JSDM. Eucalypt species that interbreed had similar environmental responses but had negative residual co-occurrence. One explanation is that interbreeding species may not form stable assemblages despite having similar environmental affinities. 4. Environmental and residual correlations estimated from JSDMs can help indicate whether co-occurrence is driven by shared environmental responses or other ecological or evolutionary process (e.g. biotic interactions), or if important predictor variables are missing. JSDMs take into account the fact that distributions of species might be related to each other and thus overcome a major limitation of modelling species distributions independently.

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Section: Discussionmentioning

confidence: 99%

Understanding co‐occurrence by modelling species simultaneously with a Joint Species Distribution Model (JSDM)

et al. 2014

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“…Although our results are based on conditioning and feedbacks observed in a greenhouse environment, and many factors could affect their inference to natural systems (e.g., soil nutrient content and a full native soil community), these results raise the possibility that subgeneric differences in PSF may contribute to the structure of mixed eucalypt stands containing species belonging to each subgenus (Davidson and Reid 1980, Austin et al 1983, Duff et al 1983). Although our results are based on conditioning and feedbacks observed in a greenhouse environment, and many factors could affect their inference to natural systems (e.g., soil nutrient content and a full native soil community), these results raise the possibility that subgeneric differences in PSF may contribute to the structure of mixed eucalypt stands containing species belonging to each subgenus (Davidson and Reid 1980, Austin et al 1983, Duff et al 1983).…”

Section: Discussionmentioning

confidence: 89%

“…On the island of Tasmania, Australia, eucalypt species typically coexist in mixed stands that tend to include at least one species from each of the two larger eucalypt subgenera, Eucalyptus and Symphyomyrtus (Austin et al 1983, Duff et al 1983). On the island of Tasmania, Australia, eucalypt species typically coexist in mixed stands that tend to include at least one species from each of the two larger eucalypt subgenera, Eucalyptus and Symphyomyrtus (Austin et al 1983, Duff et al 1983).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic trait conservatism predicts patterns of plant‐soil feedback

et al. 2018

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Plant-soil feedbacks (PSFs) are important drivers of plant community structure and diversity, with species varying in the way they both condition soils and respond to them. While plant phylogenetic relationships alone can predict this variation in some instances, trait conservatism across phylogenies may provide more reliable predictions. Using integrated common garden and glasshouse inoculation experiments including 13 Eucalyptus species across two subgenera, we specifically investigated soil microbial conditioning and root chemical traits as underlying drivers of phylogenetic differences in PSF. We found that eucalypt species responded variably to soils conditioned by closely related species, depending on their phylogenetic lineage, which was further related to root terpene concentrations and the presence/absence of specific fungal taxa in conditioned soils. Overall, these findings show that trait conservatism in root chemical traits and the subsequent conditioning of soil microbial communities can explain whether or not plants show phylogenetic patterns in PSF.

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“…It has been claimed that mixed stands of eucalypts should contain species belonging to different subgenera (Pryor's rule;Pryor 1959) because, unlike in birches, there is no hybridization between species of different subgenera. However, a critical re-analysis of Pryor's rule confirmed its occurrence only in the mountain region of southeastern Australia in which Pryor had made his observations (Austin et al 1983). Thus, for other eucalypt habitats, there is a large potential for hybridization within members of this genus.…”

Section: Responses Of Birch and Eucalypt Insects To Host Hybridsmentioning

confidence: 92%

Can we learn about herbivory on eucalypts from research on birches, or how general are general plant‐herbivore theories?

Haukioja¹,

Hanhimäki²,

Walter³

1994

Australian Journal of Ecology

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The Subgeneric Composition of Eucalypt Forest Stands in a Region of South-Eastern Australia

Cited by 17 publications

References 0 publications

Understanding co‐occurrence by modelling species simultaneously with a Joint Species Distribution Model (JSDM)

Understanding co‐occurrence by modelling species simultaneously with a Joint Species Distribution Model (JSDM)

Phylogenetic trait conservatism predicts patterns of plant‐soil feedback

Can we learn about herbivory on eucalypts from research on birches, or how general are general plant‐herbivore theories?

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