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Bruhl, Jeremy
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Given Name
Jeremy
Jeremy
Surname
Bruhl
UNE Researcher ID
une-id:jbruhl
Email
jbruhl@une.edu.au
Preferred Given Name
Jeremy
School/Department
School of Environmental and Rural Science
92 results
Now showing 1 - 10 of 92
- PublicationPhenetic analyses of 'Homoranthus' (Myrtaceae: Chamelaucieae) on the basis of morphology'Homoranthus' A.Cunn. ex Schauer is an endemic Australian genus widespread in southern and eastern mainland Australia. Phenetic analyses using clustering and ordination techniques were used to test the limits of all 23 currently recognised species. Data were analysed for 48 morphological characters from 139 specimens representing all species across their geographic ranges. Specimens of 'Homoranthus bornhardtiensis' J.T.Hunter and 'H. prolixus' Craven & S.R.Jones formed one group and appear to be the same entity. A putative natural hybrid between 'H. zeteticorum' Craven & S.R.Jones and 'H. coracinus' A.R.Bean was found to be phenetically intermediate between its putative parent species. Within each of 'H. biflorus' Craven & S.R.Jones s.l., 'H. decumbens' (Byrnes) Craven & S.R.Jones s.l., 'H. melanostictus' Craven & S.R.Jones s.l. and 'H. porteri' (C.T.White) Craven & S.R.Jones s.l., there are two or three distinct entities worthy of recognition as species. There was also strong support for the recognition of an entity from near Tenterfield in northern New South Wales as a distinct species most similar to 'H. montanus' Craven & S.R.Jones. We conclude that a total of 28 species should be recognised within 'Homoranthus', including six new, currently undescribed species.
- PublicationSedges in the mist: A new species of 'Lepidosperma' (Cyperaceae, Schoeneae) from the mountains of TasmaniaThe status of a putative new species of 'Lepidosperma' from the mountains of south-western Tasmania, Australia, was investigated. Phenetic analysis (Flexible UPGMA Agglomerative Hierarchical Fusion and semi-strong hybrid multidimensional scaling) was conducted on a database derived from morphological and anatomical characters scored from herbarium material, culm anatomy slides and scanning electron micrographs of fruit. The results of the analysis support the recognition of a new species, here described as 'Lepidosperma monticola' G.T.Plunkett & J.J.Bruhl. The distribution, habitat and conservation status are discussed.
- PublicationOxalate nephropathy in a laboratory colony of common marmoset monkeys ('Callithrix jacchus') following the ingestion of 'Eucalyptus viminalis'Seven common marmoset monkeys ('Callithrix jacchus') from a laboratory colony of 17 died over a period of eight months. Death of six of these monkeys was attributed to kidney failure from an oxalate-induced nephropathy. The epidemiology of this outbreak suggested an exogenous source and there was strong evidence that the source was bark and leaves from an 'Eucalyptus viminalis' tree. Branches of this tree were introduced one month before the first death. The branches were removed one month after deaths commenced, but deaths continued for another five months. Urinalysis of all surviving marmosets at 80 and 122 days after initial contact with the 'E viminalis' branches suggested that these monkeys had renal impairment. In the cases described here, the eating behaviour of common marmosets apparently exposed the animals to toxic levels of oxalate in the bark and leaves of an 'E viminalis' tree.
- PublicationPhylogenetic Systematics Of Ectropothecium Mitt. (Hypnacea)
Micromorphological investigations and morphometric analyses of median laminal cells in Ectropothecium Mitt. and its relatives in Hypnales confirmed the presence of protuberances in some taxa. Differences in form and size of protuberances were diagnostic and statistically significant in some taxa. Combined cpDNA (rpL32-trnL, trnH-,em>psbA, and trnSGG) and ITS1-5.8S-ITS2 nDNA sequence data were well-suited to examine evolutionary relationships of Ectropothecium. All analyses recovered Ectropothecium as paraphyletic and supported sister relationships of Ectropothecium and Vesicularia (Müll.Hal.) Müll.Hal. Analyses of molecular and combined data supported the monophyly of Australasian Ectropothecium, with the inclusion of Trachythecium verrucosum (A.Jaeger) M.Fleisch. in Ectropothecium. These latter analyses also recovered Ectropothecium and Vesicularia as sisters.
- Publication24. Schoenus(Science Press and Missouri Botanical Garden Press, 2010)
; Wilson, KarenHerbs, perennial or rarely annual. Rhizomes short. Culms terete. Leaves basal or cauline; sheath reddish brown; leaf blade flat, 3-angled, or semiterete. Involucral bracts leaflike, sheathing. Inflorescences paniculate, racemose, or rarely headlike. Spikelets usually narrowly ovoid or oblong-ovoid, usually 1-4-flowered, basal 1 or 2 flowers usually bisexual, apical 1 or 2 flowers male. Glumes dark colored with whitish margin, distichous, usually papery, deciduous, 1-veined, keeled, basal 2 or 3 empty. Perianth bristles 6 or absent. Stamens 3. Style slender; stigmas 3. Nutlet ellipsoid or obovoid, usually terete, 3-sided, or rarely biconvex, smooth or with reticulate ornamentation. More than 120 species: mostly in Australia, a few in E and SE Asia, Pacific islands (New Caledonia, New Zealand), Europe, and America; four species (one endemic) in China. - PublicationIngested 'Eucalyptus viminalis' implicated in oxalate nephropathy of marmoset monkeysThe laboratory colony of Common Marmosets ('Callithrix jacchus') was founded at the University of New England in 1992. Prior to the oxalate poisoning that we report here, only 5 deaths had occurred and at the beginning of 2002 the colony comprised 6 males and 11 females. Seven of these died between February and August 2002. Death was attributed to kidney failure from an oxalate-induced nephropathy. The source of oxalate was identified as 'Eucalyptus viminalis'. Eucalypt branches, both dried and freshly cut from various sources had always been provided for climbing, and just before January 2002 the branches used were 'E. radiata'. Branches from a new source. a recently pruned 'E. viminalis', were put in the marmosets' cages in early January 2002 and the marmosets were observed to chew on leaves and bark. The deaths commenced in February and the branches were removed in March. Urinalysis indicated that all the surviving marmosets had chronic renal damage, and as a result deaths continued until August 2002.
- Publication14. 'Oxycaryum' Nees in C. F. P. von Martius et al., Fl. Brasil. 2(1): 90. 1842Herbs, perennial, not cespitose, stoloniferous, aquatic. Cu1ms solitary, trigonous. Leaves basal; ligules present, ciliate; blades flat to V-shaped in cross section, prominently keeled on abaxial surface. Inflorescences terminal, umbellate heads or capitate; involucral bracts 1-6+, spreading, leaflike. Spikelets: scales 5-10+, 3-ranked, spirally arranged, each subtending flower. Flowers bisexual; perianth absent; stamens 3; styles 2-fid, linear, base persistent. Achenes planoconvex, margins and apex corky.
- PublicationA morphometric analysis of the 'Banksia spinulosa' complex (Proteaceae) and its complex taxonomic implicationsSpecimens of all known taxa and putative entities belonging to the 'Banksia spinulosa' complex were collected from Kuranda in northern Queensland, western to central Queensland and down the eastern coast of Australia to Wilsons Promontory in southern Victoria. These specimens were used to investigate morphological variation in habit, stems, leaves, inflorescences, fruits and seeds in the complex. Phenetic analysis (unweighted pair-group method with arithmetic mean, UPGMA, clustering and semi-strong hybrid multi-dimensional scaling, SSH-MDS, ordination) was performed on the full dataset of 233 entities using 33 characters (18 quantitative, two binary and 13 multistate). To facilitate visualisation of patterns in both clustering and ordination, we also analysed subgroups based on the results of the phenogram from the full dataset. The results showed that the five known and described taxa are phenetically distinct, viz. 'B. collina sens. str.', 'B. cunninghamii sens. str.', 'B. neoanglica', 'B. spinulosa' and 'B. vincentia', and provided support for a further 12 morphometrically diagnosable entities, four of which could not be diagnosed with simple combinations of character states and require further investigation. The present study has highlighted that there is much more hidden morphological diversity in the B. spinulosa complex than has previously been recognised in any of the current competing taxonomies.
- PublicationHistorical biogeography of 'Breynia' (Phyllanthaceae): what caused speciation?(Wiley-Blackwell Publishing Ltd, 2015)
; Aim. The dated phylogeny of 'Breynia' (including 'Sauropus') was used to analyse historical biogeographical patterns and to compare the speciation events with tectonic occurrences and biotic and abiotic aspects. Location. Southeast Asia, Malesia and Australia. Methods. Existing molecular markers ('trnS-trnG, accD-psaI', 'PHYC' and ITS)were used in BEAST to make a Bayesian age estimate with an exponential relaxed molecular clock. The resulting cladograms and maximum clade credibility (MCC) tree were used as input in statistical dispersal-vicariance analysis(S-DIVA option in the RASP package). Results. 'Breynia' originated 25-20 Ma in Thailand (western part of northern to southern Thailand) up to peninsular Malaysia. Dispersal occurred in various directions (India+Sri Lanka, China+Indochina, Malesia+Australia) establishing widespread species. Most species evolved locally in the area of origin and a relatively high number of species form limestone endemics. Main conclusions. There is little correlation between tectonic movements and dispersal patterns in 'Breynia'. Only the dispersal over Wallace's Line occurred when stepping stones were in place. Speciation, especially in the area of origin seems to be linked to soil (limestone endemics) and pollination, as indicated by the presence of deviating inflorescences in B. subgen. 'Sauropus' (no pollinators are known yet) and the obligate moth pollination in B. sect. 'Breynia'. Moreover, B. sect. 'Breynia' and three widespread species of B. subgen. Sauropushave (more) fleshy fruits and all these taxa generally have wide distributions, probably because of bird dispersal. - PublicationCrosslandia setifolia is a partly monoecious species of Fimbristylis (Abildgaardieae: Cyperaceae)(Magnolia Press, 2019-03-26)
; ; Larridon, IsabelWhile the limits of Fimbristylis Vahl (1805: 285) are contentious (Goetghebeur & Coudijzer 1984, Gordon-Gray 1971, Lye 1971, 1973), particularly with regard to the inclusion of Abildgaardia Vahl (1805: 296) within Fimbristylis, all current data support the derivation of Crosslandia W.Fitzg. (1906: 9) from within Fimbristylis (Ghamkhar et al. 2007; Hinchliff & Roalson 2013, Reutemann et al. 2018, Semmouri et al. 2018, Roalson et al. 2019). Crosslandia was described as a monotypic genus in 1906 by Fitzgerald, with more details provided in 1918, where he distinguished Crosslandia from Fimbristylis in having monoecious spikelets and "…the position and structure of the female spikelets." This is clearly a specialized, derived condition from the typically hermaphroditic flowers in monomorphic spikes of Fimbristylis, and it is not, in itself, particularly surprising that monoecy has been derived within Fimbristylis. This has been found in other Cyperaceae genera, including Eleocharis Brown (1810: 224) where there are multiple species with dimorphic inflorescences with monoecious spikes derived from the more typical hermaphroditic flowers in monomorphic spikes (Roalson et al. 2010). In addition, Clarke (2005) found that monoeicy is not always present in specimens referred to Crosslandia setifolia. For these reasons, we provide a new name in Fimbristylis to replace Crosslandia setifolia W.Fitzg. (1906: 9).