Seed traits and fate support probable primary dispersal of a native hemi-parasitic vine<i>Cassytha pubescens</i>(Lauraceae) by<i>Isoodon obesulus</i>, an endangered marsupial, in southern Australia

Maciunas, Elizabeth; Watling, Jennifer R.; Packer, Jasmin G.

doi:10.1080/03721426.2022.2050507

Cited by 2 publications

(2 citation statements)

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“…Connectivity between patches of retained vegetation, is critical for the dispersal and movement of species, with even small patches advocated as providing ‘stepping stones’ and refuges in a well‐connected landscape (Herrera et al., 2017; Sandberg et al., 2016; Wintle et al., 2019). Fragmentation can disrupt pollination and seed dispersal mechanisms, and overall genetic diversity (Delnevo et al., 2020; Maciunas et al., 2022; Nield et al., 2020; Xiao et al., 2016). The ongoing range of variation in genetic diversity of Sunshine Coast heathland Boronia spp.…”

Section: Discussionmentioning

confidence: 99%

Conserving diversity, distinctiveness and connectivity in the Sunshine Coast heathlands, Queensland, Australia

Pearl,

Ryan,

Howard

et al. 2024

Austral Ecology

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Australia is committed to global area‐based conservation targets whilst ensuring its National Reserve system is representative of ecosystem types. However, concern remains for the increasing habitat loss and fragmentation, and the possible impacts of loss of connectivity between remnant vegetation. This study uses a range of diversity metrics to examine the biodiversity conservation status of the Sunshine Coast heathlands, in the South Eastern Queensland bioregion. The pre‐clearing and remnant extent, and the protection status of the nine heath Regional Ecosystems were calculated. Fragmentation and connectivity were examined by comparing heath patch sizes, and by calculating the distance between patches, from pre‐clearing estimates, until 2019. Diversity metrics for the Regional Ecosystems, including phylogenetic metrics, were tested for correlation with habitat extent, patch size, patch number and distance between patches. Of the pre‐clearing extent, 62% of Sunshine Coast heathlands remain and 46% is protected in National Parks. Levels of protection in National Parks vary across the Local Government Areas, and between Regional Ecosystems, and the priority Regional Ecosystems for further protection were identified. There has been habitat loss resulting in reduced patch sizes, and fragmentation due to urbanization, but the number of patches of heath remains intact, and connectivity in terms of distance between patches remains stable. Phylogenetic dispersion, but not diversity, was correlated with the extent of heath and the number of patches. This highlights the opportunity to maintain biodiversity in these heathlands, with the value of small patches of heath identified as key to maintaining connectivity in the coastal lowlands, distinctiveness in the montane heaths and dunes, and overall phylogenetic dispersion. This study has shown how a variety of diversity metrics and landscape analyses can inform on priority areas for biodiversity conservation in the heathlands of an increasingly urbanized region.

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Section: Discussionmentioning

confidence: 99%

Conserving diversity, distinctiveness and connectivity in the Sunshine Coast heathlands, Queensland, Australia

Pearl,

Ryan,

Howard

et al. 2024

Austral Ecology

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“…Thus, it is assumed that zoochory (e.g., dispersal by vertebrates) is important for the spread of Cassytha ( French and Westoby, 1996 ). Recent experiments also provide evidence that mammals are involved in the dispersal of Cassytha pubescens ( Maciunas et al, 2022 ). Some Cassytha species, such as C. filiformis , have refractory seeds with a hard seed coat and are found predominantly in coastal regions ( Heide-Jørgensen, 2008 ; Mahadevan and Jayasuriya, 2013 ).…”

Section: Parasitic Habits and Host Range Of Cassythamentioning

confidence: 99%

The Angiosperm Stem Hemiparasitic Genus Cassytha (Lauraceae) and Its Host Interactions: A Review

Zhang¹,

Florentine²,

Tennakoon³

2022

Front. Plant Sci.

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Cassytha, also known as laurel dodder or love vine, is a stem hemiparasite of the Lauraceae family. It has long been used for medicinal purposes in many countries and has increasingly influenced agricultural and natural ecosystems by its effects on a wide range of host species. Previous studies have focused on the taxonomy and evolutionary position of different Cassytha, with the pan-tropical species Cassytha filiformis being the most widely studied. However, Cassytha–host interactions have never been reviewed, which is an essential issue related to the understanding of mechanisms underlying plant hemiparasitic and the assessment of benefits and damage caused by aerial parasitic plants. This review explores the parasitic habits, worldwide distribution, and host range of Cassytha, and examines its impacts on the biology of host plants and the overall influence of environmental changes on Cassytha–host associations. We also comment on areas of future research directions that require to better understanding Cassytha–host interactions. It appeared that some traits, such as flowering phenology, facilitated Cassytha’s widespread distribution and successful parasitism and that Cassytha preferred woody species rather than herbaceous species as a host, and preferred species from certain families as hosts, such as Fabaceae and Myrtaceae. Cassytha often decreased biomass and impacted the physiology of host species and global environmental changes seemed to intensify the negative impacts of Cassytha on their hosts. Cassytha was not only a noxious weed, but can also function as a biocontrol agent to mitigate alien plant invasion.

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Seed traits and fate support probable primary dispersal of a native hemi-parasitic vineCassytha pubescens(Lauraceae) byIsoodon obesulus, an endangered marsupial, in southern Australia

Cited by 2 publications

References 65 publications

Conserving diversity, distinctiveness and connectivity in the Sunshine Coast heathlands, Queensland, Australia

Conserving diversity, distinctiveness and connectivity in the Sunshine Coast heathlands, Queensland, Australia

The Angiosperm Stem Hemiparasitic Genus Cassytha (Lauraceae) and Its Host Interactions: A Review

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