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  • 1
    Online Resource
    Online Resource
    Cross-species patterns in the coordination between leaf and stem traits, and their implications for plant hydraulics
    Wiley ; 2006
    In:  Physiologia Plantarum Vol. 127, No. 3 ( 2006-07-05), p. 445-456
    Details
    In: Physiologia Plantarum, Wiley, Vol. 127, No. 3 ( 2006-07-05), p. 445-456
    Type of Medium: Online Resource
    ISSN: 0031-9317 , 1399-3054
    URL: Article
    DOI: 10.1111/j.1399-3054.2006.00699.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2006
    detail.hit.zdb_id: 208872-1
    detail.hit.zdb_id: 2020837-6
    SSG: 12
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  • 2
    Online Resource
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    Reversal of height dimorphism promotes pollen and seed dispersal in a wind-pollinated dioecious plant
    The Royal Society ; 2012
    In:  Biology Letters Vol. 8, No. 2 ( 2012-04-23), p. 245-248
    Details
    In: Biology Letters, The Royal Society, Vol. 8, No. 2 ( 2012-04-23), p. 245-248
    Abstract: Variation in the timing of reproductive functions in dioecious organisms may result in adaptive changes in the direction of sexual dimorphism during the breeding season. For plants in which both pollen and seeds are wind-dispersed, it may be advantageous for male plants to be taller when pollen is dispersed and female plants to be taller when seeds are dispersed. We examined the dynamics of height dimorphism in Rumex hastatulus , an annual, wind-pollinated, dioecious plant from the southern USA. A field survey of seven populations indicated that females were significantly taller than males at seed maturity. However, a glasshouse experiment revealed a more complex pattern of height growth during the life cycle. No dimorphism was evident prior to reproduction for six of seven populations, but at flowering, males were significantly taller than females in all populations. This pattern was reversed at reproductive maturity, consistent with field observations. Males flowered later than females and the degree of height dimorphism was greater in populations with a later onset of male flowering. We discuss the potential adaptive significance of temporal changes in height dimorphism for pollen and seed dispersal, and how this may be optimized for the contrasting reproductive functions of the sexes.
    Type of Medium: Online Resource
    ISSN: 1744-9561 , 1744-957X
    URL: Article
    DOI: 10.1098/rsbl.2011.0950
    Language: English
    Publisher: The Royal Society
    Publication Date: 2012
    detail.hit.zdb_id: 2103283-X
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    COMPARATIVE ANALYSES OF SEX-RATIO VARIATION IN DIOECIOUS FLOWERING PLANTS : SEX RATIOS IN FLOWERING PLANTS
    Wiley ; 2013
    In:  Evolution Vol. 67, No. 3 ( 2013-03), p. 661-672
    Details
    In: Evolution, Wiley, Vol. 67, No. 3 ( 2013-03), p. 661-672
    Type of Medium: Online Resource
    ISSN: 0014-3820
    URL: Issue
    URL: Article
    DOI: 10.1111/evo.2013.67.issue-3
    DOI: 10.1111/evo.12001
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2036375-8
    SSG: 12
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  • 4
    Online Resource
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    Predicting local adaptation in fragmented plant populations: implications for restoration genetics
    Wiley ; 2012
    In:  Evolutionary Applications Vol. 5, No. 8 ( 2012-12), p. 913-924
    Details
    In: Evolutionary Applications, Wiley, Vol. 5, No. 8 ( 2012-12), p. 913-924
    Abstract: Understanding patterns and correlates of local adaptation in heterogeneous landscapes can provide important information in the selection of appropriate seed sources for restoration. We assessed the extent of local adaptation of fitness components in 12 population pairs of the perennial herb R utidosis leptorrhynchoides ( A steraceae) and examined whether spatial scale (0.7–600 km), environmental distance, quantitative ( Q ST ) and neutral ( F ST ) genetic differentiation, and size of the local and foreign populations could predict patterns of adaptive differentiation. Local adaptation varied among populations and fitness components. Including all population pairs, local adaptation was observed for seedling survival, but not for biomass, while foreign genotype advantage was observed for reproduction (number of inflorescences). Among population pairs, local adaptation increased with Q ST and local population size for biomass. Q ST was associated with environmental distance, suggesting ecological selection for phenotypic divergence. However, low F ST and variation in population structure in small populations demonstrates the interaction of gene flow and drift in constraining local adaptation in R . leptorrhynchoides . Our study indicates that for species in heterogeneous landscapes, collecting seed from large populations from similar environments to candidate sites is likely to provide the most appropriate seed sources for restoration.
    Type of Medium: Online Resource
    ISSN: 1752-4571 , 1752-4571
    URL: Issue
    URL: Article
    DOI: 10.1111/eva.2012.5.issue-8
    DOI: 10.1111/j.1752-4571.2012.00284.x
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2405496-3
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  • 5
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    An evaluation of the genetic structure of seed sources and the maintenance of genetic diversity during establishment of two yellow box (Eucalyptus melliodora) seed-production areas
    CSIRO Publishing ; 2015
    In:  Australian Journal of Botany Vol. 63, No. 5 ( 2015), p. 455-
    Details
    In: Australian Journal of Botany, CSIRO Publishing, Vol. 63, No. 5 ( 2015), p. 455-
    Abstract: Vegetation clearing and land-use change have depleted many natural plant communities to the point where restoration is required. A major impediment to the success of rebuilding complex vegetation communities is having regular access to sufficient quantities of high-quality seed. Seed-production areas (SPAs) can help generate this seed, but these must be underpinned by a broad genetic base to maximise the evolutionary potential of restored populations. However, genetic bottlenecks can occur at the collection, establishment and production stages in SPAs, requiring genetic evaluation. This is especially relevant for species that may take many years before a return on SPA investment is realised. Two recently established yellow box (Eucalyptus melliodora A.Cunn. ex Schauer, Myrtaceae) SPAs were evaluated to determine whether genetic bottlenecks had occurred between seed collection and SPA establishment. No evidence was found to suggest that a significant loss of genetic diversity had occurred at this stage, although there was a significant difference in diversity between the two SPAs. Complex population genetic structure was also observed in the seed used to source the SPAs, with up to eight groups identified. Plant survival in the SPAs was influenced by seed collection location but not by SPA location and was not associated with genetic diversity. There were also no associations between genetic diversity and plant growth. These data highlighted the importance of chance events when establishing SPAs and indicated that the two yellow box SPAs are likely to provide genetically diverse seed sources for future restoration projects, especially by pooling seed from both SPAs.
    Type of Medium: Online Resource
    ISSN: 0067-1924
    URL: Article
    DOI: 10.1071/BT15023
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 1496155-6
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Ecological context and metapopulation dynamics affect sex-ratio variation among dioecious plant populations
    Oxford University Press (OUP) ; 2013
    In:  Annals of Botany Vol. 111, No. 5 ( 2013-5), p. 917-923
    Details
    In: Annals of Botany, Oxford University Press (OUP), Vol. 111, No. 5 ( 2013-5), p. 917-923
    Type of Medium: Online Resource
    ISSN: 1095-8290 , 0305-7364
    URL: Article
    DOI: 10.1093/aob/mct040
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2013
    detail.hit.zdb_id: 1461328-1
    SSG: 12
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  • 7
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    Effects of fine-scale population structure on the distribution of heterozygosity in a long-term study of Antirrhinum majus
    Oxford University Press (OUP) ; 2022
    In:  Genetics Vol. 221, No. 3 ( 2022-07-04)
    Details
    In: Genetics, Oxford University Press (OUP), Vol. 221, No. 3 ( 2022-07-04)
    Abstract: Many studies have quantified the distribution of heterozygosity and relatedness in natural populations, but few have examined the demographic processes driving these patterns. In this study, we take a novel approach by studying how population structure affects both pairwise identity and the distribution of heterozygosity in a natural population of the self-incompatible plant Antirrhinum majus. Excess variance in heterozygosity between individuals is due to identity disequilibrium, which reflects the variance in inbreeding between individuals; it is measured by the statistic g2. We calculated g2 together with FST and pairwise relatedness (Fij) using 91 SNPs in 22,353 individuals collected over 11 years. We find that pairwise Fij declines rapidly over short spatial scales, and the excess variance in heterozygosity between individuals reflects significant variation in inbreeding. Additionally, we detect an excess of individuals with around half the average heterozygosity, indicating either selfing or matings between close relatives. We use 2 types of simulation to ask whether variation in heterozygosity is consistent with fine-scale spatial population structure. First, by simulating offspring using parents drawn from a range of spatial scales, we show that the known pollen dispersal kernel explains g2. Second, we simulate a 1,000-generation pedigree using the known dispersal and spatial distribution and find that the resulting g2 is consistent with that observed from the field data. In contrast, a simulated population with uniform density underestimates g2, indicating that heterogeneous density promotes identity disequilibrium. Our study shows that heterogeneous density and leptokurtic dispersal can together explain the distribution of heterozygosity.
    Type of Medium: Online Resource
    ISSN: 1943-2631
    URL: Article
    DOI: 10.1093/genetics/iyac083
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
    detail.hit.zdb_id: 1477228-0
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  • 8
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    Online Resource
    Evolutionary history and genetic connectivity across highly fragmented populations of an endangered daisy
    Springer Science and Business Media LLC ; 2021
    In:  Heredity Vol. 126, No. 5 ( 2021-05), p. 846-858
    Details
    In: Heredity, Springer Science and Business Media LLC, Vol. 126, No. 5 ( 2021-05), p. 846-858
    Abstract: Conservation management can be aided by knowledge of genetic diversity and evolutionary history, so that ecological and evolutionary processes can be preserved. The Button Wrinklewort daisy ( Rutidosis leptorrhynchoides ) was a common component of grassy ecosystems in south-eastern Australia. It is now endangered due to extensive habitat loss and the impacts of livestock grazing, and is currently restricted to a few small populations in two regions 〉 500 km apart, one in Victoria, the other in the Australian Capital Territory and nearby New South Wales (ACT/NSW). Using a genome-wide SNP dataset, we assessed patterns of genetic structure and genetic differentiation of 12 natural diploid populations. We estimated intrapopulation genetic diversity to scope sources for genetic management. Bayesian clustering and principal coordinate analyses showed strong population genetic differentiation between the two regions, and substantial substructure within ACT/NSW. A coalescent tree-building approach implemented in SNAPP indicated evolutionary divergence between the two distant regions. Among the populations screened, the last two known remaining Victorian populations had the highest genetic diversity, despite having among the lowest recent census sizes. A maximum likelihood population tree method implemented in TreeMix suggested little or no recent gene flow except potentially between very close neighbours. Populations that were more genetically distinctive had lower genetic diversity, suggesting that drift in isolation is likely driving population differentiation though loss of diversity, hence re-establishing gene flow among them is desirable. These results provide background knowledge for evidence-based conservation and support genetic rescue within and between regions to elevate genetic diversity and alleviate inbreeding.
    Type of Medium: Online Resource
    ISSN: 0018-067X , 1365-2540
    URL: Article
    DOI: 10.1038/s41437-021-00413-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2006446-9
    detail.hit.zdb_id: 2423-5
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  • 9
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    Risk Factors for Tobacco Use by Utilizers of the Pediatric Emergency Department
    SAGE Publications ; 2003
    In:  Clinical Pediatrics Vol. 42, No. 7 ( 2003-09), p. 653-656
    Details
    In: Clinical Pediatrics, SAGE Publications, Vol. 42, No. 7 ( 2003-09), p. 653-656
    Type of Medium: Online Resource
    ISSN: 0009-9228 , 1938-2707
    URL: Article
    DOI: 10.1177/000992280304200714
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2003
    detail.hit.zdb_id: 2066146-0
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  • 10
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    Online Resource
    AusTraits, a curated plant trait database for the Australian flora
    Springer Science and Business Media LLC ; 2021
    In:  Scientific Data Vol. 8, No. 1 ( 2021-09-30)
    Details
    In: Scientific Data, Springer Science and Business Media LLC, Vol. 8, No. 1 ( 2021-09-30)
    Abstract: We introduce the AusTraits database - a compilation of values of plant traits for taxa in the Australian flora (hereafter AusTraits). AusTraits synthesises data on 448 traits across 28,640 taxa from field campaigns, published literature, taxonomic monographs, and individual taxon descriptions. Traits vary in scope from physiological measures of performance (e.g. photosynthetic gas exchange, water-use efficiency) to morphological attributes (e.g. leaf area, seed mass, plant height) which link to aspects of ecological variation. AusTraits contains curated and harmonised individual- and species-level measurements coupled to, where available, contextual information on site properties and experimental conditions. This article provides information on version 3.0.2 of AusTraits which contains data for 997,808 trait-by-taxon combinations. We envision AusTraits as an ongoing collaborative initiative for easily archiving and sharing trait data, which also provides a template for other national or regional initiatives globally to fill persistent gaps in trait knowledge.
    Type of Medium: Online Resource
    ISSN: 2052-4463
    URL: Article
    DOI: 10.1038/s41597-021-01006-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2775191-0
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