Michelle Waycott

Michelle Waycott
University of Adelaide · Department of Ecology and Evolutionary Biology | School of Biological Science

About

334
Publications
89,932
Reads
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14,563
Citations
Citations since 2017
64 Research Items
7974 Citations
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
201720182019202020212022202302004006008001,0001,2001,400
Additional affiliations
August 2011 - present
University of Adelaide
Position
  • Professor of Plant Systematics
January 1996 - February 1997
University of Western Australia
Position
  • Research associate and Associate Lecturer

Publications

Publications (334)
Article
Full-text available
A molecular genetic approach was used to elucidate the phylogeographic relationships of the clover grass (Halophila baillonii Asch.) from three key regions within its current distributional range. Halophila baillonii is a small seagrass that has historically been only found in a few locations in the Caribbean and Atlantic coast of Brazil. In the pa...
Article
Full-text available
Metabarcoding has improved the way we understand plants within our environment, from their ecology and conservation to invasive species management. The notion of identifying plant taxa within environmental samples relies on the ability to match unknown sequences to known reference libraries. Without comprehensive reference databases, species can go...
Preprint
Full-text available
Metabarcoding has improved the way we understand plants within our environment, from their ecology and conservation to invasive species management. The notion of identifying plant taxa within environmental samples relies on the ability to match unknown sequences to known reference libraries. Without comprehensive reference databases, species can go...
Article
Full-text available
Globally marine-terrestrial interfaces are highly impacted due to a range of human pressures. Seagrass habitats exist in the shallow marine waters of this interface, have significant values and are impacted by a range of pressures. Cumulative risk analysis is widely used to identify risk from multiple threats and assist in prioritizing management a...
Article
Full-text available
Halophila johnsonii is an endangered seagrass species that is restricted to the southeast coast of Florida, United States. Its taxonomic status has been called into question, in particular, given the close morphological and genetic similarity of H. johnsonii and the widely distributed and morphologically variable Halophila ovalis, which is largely...
Article
Full-text available
Premise: Continental-scale disjunctions and associated drivers are core research interests in biogeographic studies. Here, we selected a species-rich Australian plant genus (Calytrix; Myrtaceae) as a case study to investigate these patterns. Species of this endemic Australian starflower genus have a disjunct distribution across the mesic fringes o...
Article
Full-text available
Metabarcoding of plant DNA recovered from environmental samples, termed environmental DNA (eDNA), has been used to detect invasive species, track biodiversity changes, and reconstruct past ecosystems. The P6 loop of the trnL intron is the most widely utilised gene region for metabarcoding plants due to the short fragment length and subsequent ease...
Preprint
A proliferation in environmental DNA (eDNA) research has increased the reliance on reference sequence databases to assign unknown DNA sequences to known taxa. Without comprehensive reference databases, DNA extracted from environmental samples cannot be correctly assigned to taxa, limiting the use of this genetic information to identify organisms in...
Preprint
Full-text available
Novel multi-gene targeted capture probes have been developed with the objective of obtaining multi-locus high quality sequence reads across any angiosperm lineage. Using existing genomic and transcriptomic data, two independent single assay probe/bait sets have been developed, the first targeting conserved exons from 20 low copy nuclear genes (OzBa...
Preprint
Full-text available
Metabarcoding of plant DNA recovered from environmental samples, termed environmental DNA (eDNA), has been used to detect invasive species, track biodiversity changes and reconstruct past ecosystems. The P6 loop of the trnL intron is the most widely utilized gene region for metabarcoding plants due to the short fragment length and subsequent ease o...
Article
Aim Gondwanan biogeographic patterns include a combination of old vicariance events following the breakup of the supercontinent, and more recent long-distance dispersals across the southern landmasses. Floristic relationships between Australia and New Zealand have mostly been attributed to recent dispersal events rather than vicariance. We assessed...
Article
Full-text available
Three case studies involving two temperate Australian seagrass species – Pondweed (Ruppia tuberosa) and Ribbon Weed (Posidonia australis) – highlight different approaches to their restoration. Seeds and rhizomes were used in three collaborative programmes to promote new approaches to scale up restoration outcomes.
Article
Full-text available
Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadly on the ecology of benthic nearshore environments dominated by seagrasses, seaweeds, and coral reefs. She took an empirical approach founded in techniques of physiological ecology. Susan was committed to applying her research results to ocean managemen...
Article
Full-text available
Cytonuclear discordance, commonly detected in phylogenetic studies, is often attributed to hybridization and/or incomplete lineage sorting (ILS). New sequencing technologies and analytical approaches can provide new insights into the relative importance of these processes. Hybridization has previously been reported in the Australian endemic plant g...
Article
Full-text available
A hybrid origin for a conservation listed taxon will influence its status and management options. Here, we investigate the genetic origins of a nationally endangered listed taxon—Eucalyptus paludicola—a tree that is restricted to the Fleurieu Peninsula and Kangaroo Island of South Australia. Since its description in 1995, there have been suggestion...
Article
Full-text available
Seagrasses are important marine ecosystems situated throughout the world’s coastlines. They are facing declines around the world due to global and local threats such as rising ocean temperatures, coastal development and pollution from sewage outfalls and agriculture. Efforts have been made to reduce seagrass loss through reducing local and regional...
Article
Full-text available
Implementing management actions to achieve environmental outcomes requires defining and quantifying ecological targets, but this is a complex challenge, and there are few examples of how to quantitatively set them in complex dynamic marine ecosystems. Here we develop a methodology to devise ‘desired state’ for tropical seagrasses in Cleveland Bay,...
Article
Full-text available
Temperate Australia has extensive and diverse coast and marine habitats throughout its inshore and offshore waters. The region includes the southernmost extent of mangroves, over 500 estuaries and coastal embayments, home to extensive meadows of seagrasses and tidal saltmarsh. In areas of hard substrate, rocky reefs are abundant and productive with...
Article
Full-text available
The diversification dynamics of the Australian temperate flora remains poorly understood. Here, we investigate whether differences in plant richness in the southwest Australian (SWA) biodiversity hotspot and southeast Australian (SEA) regions of the Australian continent can be attributed to higher net diversification, more time for species accumula...
Article
Full-text available
Mangroves provide many ecosystem services including a considerable capacity to sequester and store large amounts of carbon, both in the sediment and in the above-ground biomass. Assessment of mangrove above-ground carbon stock relies on accurate measurement of tree biomass, which traditionally involves collecting direct measurements from trees and...
Article
Full-text available
Seagrass, saltmarsh and mangrove habitats are declining around the world as anthropogenic activity and climate change intensify. To be able to effectively restore and maintain healthy coastal-vegetation communities, we must understand how and why they have changed in the past. Identifying shifts in vegetation communities, and the environmental or h...
Article
Full-text available
The genetic population structure of Halodule wrightii at locations in Florida, North Carolina, and Bermuda was investigated using 11 polymorphic microsatellite loci on samples representing 15 sites. We measured allelic diversity and genotypic richness and determined population differentiation and gene flow using principal components and k-means pop...
Article
Full-text available
In coastal waters around the world, the dominant primary producers are benthic macrophytes, including seagrasses and macroalgae, that provide habitat structure and food for diverse and abundant biological communities and drive ecosystem processes. Seagrass meadows and macroalgal forests play key roles for coastal societies, contributing to fishery...
Article
Full-text available
Understanding how microbial communities change with environmental degradation and restoration may offer new insights into the understudied ecology that connects humans, microbiota, and the natural world. Immunomodulatory microbial diversity and ‘Old Friends’ are thought to be supplemented from biodiverse natural environments, yet deficient in anthr...
Technical Report
Full-text available
The 2016 Bush Blitz Survey to Lake Torrens and five adjoining pastoral leases provided an opportunity to greatly increase the knowledge on the flora of the area. The preceding seasonal rainfall provided high quality conditions for plant growth and flowering and also the presence of water in areas of Lake Torrens and surrounds. A total of 382 unique...
Article
Full-text available
Evaluating genetic diversity of seagrasses provides insight into reproductive mode and adaptation potential, and is therefore integral to broader conservation strategies for coastal ecosystems. In this study, we assessed genetic diversity, population structure and gene flow in an opportunistic seagrass, Syringodium filiforme, in the Florida Keys an...
Data
Pairwise genetic differentiation. FST values are provided to the left of the diagonal and Jost's D values are provided to the right of the diagonal. Bold text indicates significance based on non-overlapping confidence intervals. (DOCX)
Data
Principal components analysis (PCA) plot. Axis loading values are depicted for the two principle coordinate axes containing the greatest amount of variation, PC1 (18.3% variance) and PC2 (7.7% variance). Genotypes from each population group are distinguished by color and shape (Atlantic: blue circles, Gulf: orange triangles, Bermuda: yellow diamond...
Data
Sample site GPS coordinates. GPS coordinates mark the exact location of each sample site. Latitude and longitude are in decimal degrees. (DOCX)
Data
Values for relative magnitude and direction of gene flow. Values represent the relative amount of gene flow from populations in the first column to receiving populations identified in the first row. For example, the highest amount of gene flow (1.000) occurs from Carysfort to Davis, while the lowest amount of gene flow occurs from the Bahamas to Ke...
Article
Seagrass ecosystems are inherently dynamic, responding to environmental change across a range of scales. Habitat requirements of seagrass are well defined, but less is known about their ability to resist disturbance. Specific means of recovery after loss are particularly difficult to quantify. Here we assess the resistance and recovery capacity of...
Article
Building DNA barcode databases for plants has historically been ad hoc, and often with a relatively narrow taxonomic focus. To realise the full potential of DNA barcoding for plants, and particularly its application to metabarcoding for mixed-species environmental samples, systematic sequencing of reference collections is required using an augmente...
Chapter
Seagrasses have evolved independently at least four times throughout their evolutionary history. All seagrasses are members of the monocot order Alismatales. A new molecular phylogenetic analysis, applying a molecular clock based on recently redefined fossil evidence, provides a framework for describing the timing and relationships of seagrass line...
Chapter
The coastal waters of southern and south-western Australia are home to almost 30,000 km² of seagrass, dominated by temperate endemic species of the genera Posidonia and Amphibolis. In this region, seagrasses are common in estuaries and sheltered coastal areas including bays, lees of islands, headlands, and fringing coastal reefs. Additionally, exte...
Chapter
Connectivity among populations influences resilience, genetic diversity , adaptation and speciation, so understanding this process is fundamental for conservation and management. This chapter summarises the main mechanisms of gene flow within and among seagrass meadows, and what we know about the spatial patterns of gene flow around Australia’s coa...
Chapter
Seagrasses are an organismal biological group united by their ability to grow in marine environments. As marine flowering plants they have evolved a combined suite of adaptations multiple times enabling the four known lineages containing species of seagrass to survive, and thrive, in the sea. Unlike many other biological groups of plants however, s...
Conference Paper
Understanding the factors influencing population structure and genetic diversity of marine communities is fundamental to the discipline of conservation genetics. Marine angiosperms such as Amphibolis antarctica battle variation in abiotic environmental factors. Highlighting the mechanisms that influence the population structure and understanding th...
Article
Human contact with soil may be important for building and maintaining normal healthy immune defence mechanisms, however this idea remains untested at the population-level. In this continent-wide, cross-sectional study we examine the possible public health benefit of ambient exposures to soil of high cation exchange capacity (CEC), a surrogate for p...
Article
Full-text available
Many ecosystems are experiencing rapid transformations due to global environmental change. Understanding how ecological shifts affect species persistence is critical to modern management strategies. The edge of a species range is often where physiological tolerances are in conflict with ability to persist. Extreme examples of clonality over large s...
Article
The limited data available on the genetic diversity of the temperate seagrass Amphibolis antarctica indicate diversity may be extremely low. The available previous study was based on allozymes and restriction fragment length polymorphisms (RFLPs) as molecular markers. Numerous studies into other seagrass taxa have shown that these markers may not h...
Article
Megatrends of urbanisation and reducing contact with natural environments may pose a largely unappreciated risk to human health, particularly in children, through declining normal (healthy) immunomodulatory environmental exposures. On the other hand, building knowledge of connections between environments, biodiversity and human health may offer new...
Technical Report
Full-text available
The 2017 Bush Blitz Survey to the Great Victoria Desert (GVD) targeted Mamungari Conservation Park (CP) and the adjoining area of the Maralinga Tjarutja Lands. It provided an opportunity to greatly increase the knowledge on the flora of the area. The survey resulted in the collection of 660 specimens with nearly all the vascular plant collections...
Article
Full-text available
Clonality is common in many aquatic plant species, including seagrasses, where populations are maintained through a combination of asexual and sexual reproduction. One common measure used to describe the clonal structure of populations is clonal richness. Clonal richness is strongly dependent on the biological characteristics of the species, and ho...
Technical Report
Full-text available
Summary The Government of South Australia has developed a network of 19 marine parks as the South Australian component of the National Representative System of Marine Protected Areas. In accordance with the objects of the Marine Parks Act 2007, the 19 marine parks across South Australia provide for biodiversity conservation and public appreciation...
Article
Seagrass species form important marine and estuarine habitats providing valuable ecosystem services and functions. Coastal zones that are increasingly impacted by anthropogenic development have experienced substantial declines in seagrass abundance around the world. Australia, which has some of the world’s largest seagrass meadows and is home to ov...
Article
Coastline degradation and subsequent ecosystem loss, has long been attributed to anthropogenic stress and is an all too familiar issue affecting coastal habitats. Should management and conservation efforts fail to improve the quality of coastal ecosystems and the services they provide, they may be irrevocably damaged. A significant limitation to co...
Article
Next-generation sequencing (NGS) provides numerous tools for population and systematic studies. These tools are a boon to researchers working with non-model and poorly characterised organisms where little or no genomic resources exist. Several techniques have been developed to subsample the genomes of multiple individuals from related populations a...
Article
Microbiota from environmental sources overlap and interact with human microbiota, contribute to human microbial diversity, and provide beneficial immunomodulatory stimuli. Meanwhile, reduced diversity in human microbiota and immune dysregulation have been associated with a range of diseases. Emerging evidence suggests landscape-scale drivers of mic...
Article
The movement of propagules among plant populations affects their ability to replenish and recover after a disturbance. Quantitative data on recovery strategies, including the effectiveness of population connectivity, are often lacking at broad spatial and temporal scales. We use numerical modelling to predict seagrass propagule dispersal and settle...
Article
Phenetic analysis of morphological characters in different species of Onobrychis Miller sect. HymenobrychisDC.(Fabaceae),classi edthem in two main groups based on corolla features. To determine the phylogenetic relationships among the 13 species, chloroplast DNA sequences were used. Analysis of these data resulted in a well-resolved and well-suppor...
Article
Seagrasses worldwide are highly vulnerable to, and at increasing risk from reduced light availability, and robust light thresholds are required for evaluating future impacts of changing light conditions. We tested the morphological response (shoot density and growth) of four Indo-West Pacific seagrass species (Cymodocea serrulata, Halodule uninervi...
Technical Report
Full-text available
Carpobrotus (pigface) is a world-wide genus of succulent plants, with species native to South Africa, Australia, South America and California. Herbarium botanists, NRM staff and coastal managers have all observed highly variable morphology of Carpobrotus rossii in the field and the relationship of this variability to potential hybridisation with C....
Article
Full-text available
Stakeholder engagement is important for successful management of natural resources, both to make effective decisions and to obtain support. However, in the context of coastal management, questions remain unanswered on how to effectively link decisions made at the catchment level with objectives for marine biodiversity and fisheries productivity. Mo...