Gerry P. Quinn's research while affiliated with Deakin University and other places

Publications (31)

Article
Aquafeed manufacturers are increasingly interested in ensuring consistently high-quality products, while relying heavily on poultry offal meal (POM), which is inevitably variable. This study examined the chemical composition of 22 different commercially and experimentally produced POM to determine which chemical variables best predict in vivo prote...
Article
QuestionsDo nurse plant interactions significantly influence understorey vegetation diversity in a large, semi-arid, shrub-dominated wetland? How do the modes and net effects of nurse plant interactions vary spatially along a flood frequency gradient, and temporally in response to drying?LocationNarran Lakes Ramsar site, New South Wales, Australia....
Article
In intermittently open estuaries, the sources of organic matter sustaining benthic invertebrates are likely to vary seasonally, particularly between periods of connection and disconnection with the ocean and higher and lower freshwater flows. This study investigated the contribution of allochthonous and autochthonous primary production to the diet...
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This study examined the effects of a guild of micrograzing harpacticoid copepods (dominated by two species of Paradactylopodia sp. nov. and one species of Scutellidium sp. nov.) and a mesograzing periwinkle, Afrolittorina praetermissa, on the early recruitment of intertidalmacroalgae on a wave-exposed, rocky shore. This is the first study, to our k...
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Species with broader geographical ranges are expected to be ecological generalists, while species with higher heat tolerances may be relatively competitive at more extreme and increasing temperatures. Thus, both traits are expected to relate to increased survival during transport to new regions of the globe, and once there, establishment and spread...
Article
Here we investigate behavioral responses to fine-scale spatial and temporal temperature gradients in a heat tolerant hydrothermal vent worm (Paralvinella sulfincola). While this species has been a model organism for understanding physiological adaptations to extreme environments, lacking are corroborative in situ experiments and characterization of...
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The structure and function of agricultural stream reaches with sparse riparian and floodplain vegetation differ from those of forested reaches, but may be ‘reset’ as these streams flow through reaches with forested riparian zones. We investigated whether invertebrate colonisation of River Red Gum (Eucalyptus camaldulensis) leaf packs in lowland int...
Article
1. The loss of input of leaf litter through clearing of riparian vegetation may result in significant changes to aquatic ecosystems. River red gums (Eucalyptus camaldulensis) surrounding floodplain wetlands in the Murray–Darling Basin, Australia, contribute large quantities of leaf litter, but the quality of this resource may change depending on th...
Article
Outflows from estuaries potentially contribute to the productivity of adjacent coastal waters, although most previous work has been on estuaries with considerable river discharge. We investigated the influence of estuary outflow on aspects of coastal sediments adjacent to two seasonally intermittent estuaries, the Curdles and Anglesea Rivers, in so...
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Improved access to multibeam sonar and underwater video technology is enabling scientists to use spatially-explicit, predictive modelling to improve our understanding of marine ecosystems. With the growing number of modelling approaches available, knowledge of the relative performance of different models in the marine environment is required. Habit...
Article
Extensive clearing of floodplain forests potentially reduces organic matter available to floodplain wetlands. Furthermore, on rivers regulated to provide irrigation water in summer, floodplain wetlands that were previously inundated in spring, now flood in summer/autumn. In the Murray-Darling Basin, Australia, this has changed the timing of organic...
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A major environmental issue for hydro-electric power generation is passage of fish through turbines, or entrainment onto trash racks. At Yarrawonga Weir, on the upper Murray River in south-eastern Australia, the positioning of a fish lock resulted in the potential for upstream migrating fish to be swept back into the adjacent power station by cross...
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Summary A common approach to nature conservation is to identify and protect natural ‘assets’ such as ecosystems and threatened species. While such actions are essential, protection of assets will not be effective unless the ecological processes that sustain them are maintained. Here, we consider the role of ecological processes and the complementar...
Article
We investigated the effects of flooding and drying over 6 months on growth and biomass allocation in seedlings of Muehlenbeckia florulenta Meisn. (tangled lignum), a common and widely distributed shrub of Australia's desert floodplains.We sought to determine if lignum seedlings respond to flooding or drying by altering traits or allocation patterns...
Article
The development of traceability methods to distinguish between farmed and wild-caught fish and seafood is becoming increasingly important. However, very little is known about how to distinguish fish originating from different farms. The present study addresses this issue by attempting to discriminate among intensively farmed freshwater Murray cod o...
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Ecological responses to wetting and drying in dryland river floodplain systems are often described in terms of "boom" and "bust". We suggest that patterns in floodplain species abundances and assemblage structures will be closely linked to the changes in spatial habitat heterogeneity that accompany flooding and drying phases. This study examined th...
Article
Summary • Large amounts of terrestrial detritus enter many low-order forested streams, and this organic material is often the major basal resource in the metazoan food webs of such systems. However, despite their apparently low biomass, algae are the dominant food of organisms in a number of aquatic communities which conventionally would have been...
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INTRODUCTION Riparian zones, river-marginal wetland environments and flood plains are key landscape elements with a high diversity of natural functions and services. They are dynamic systems that are shaped by repeated erosion and deposition of sediment, inundation during rising water levels, and complex groundwater–surface water exchange processes...
Article
Clustering of multivariate data is a commonly used technique in ecology, and many approaches to clustering are available. The results from a clustering algorithm are uncertain, but few clustering approaches explicitly acknowledge this uncertainty. One exception is Bayesian mixture modelling, which treats all results probabilistically, and allows co...
Article
Clustering of multivariate data is a commonly used technique in ecology, and many approaches to clustering are available. The results from a clustering algorithm are uncertain, but few clustering approaches explicitly acknowledge this uncertainty. One exception is Bayesian mixture modelling, which treats all results probabilistically, and allows co...
Conference Paper
Every year, millions of dollars are spent on river management and rehabilitation activities across Australia. Most of these activities are based on assumptions about the ecology of river systems and potential threats or causes of degradation. While river management activities are widespread, monitoring and evaluation to assess if . interventions ha...
Book
1. Introduction 2. Estimation 3. Hypothesis testing 4. Graphical exploration of data 5. Correlation and regression 6. Multiple regression and correlation 7. Design and power analysis 8. Comparing groups or treatments - analysis of variance 9. Multifactor analysis of variance 10. Randomized blocks and simple repeated measures: unreplicated two-facto...
Article
Monitoring Ecological Impacts provides the tools needed to design assessment programs that can reliably monitor, detect, and allow management of human impacts on the natural environment. The procedures described are well-grounded in inferential logic, and the statistical models needed to analyse complex data are given. Step-by-step guidelines and f...
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Full-text available
Large floodplain ecosystems are a feature of Australia's dryland rivers. They are associated with extensive wetlands and numerous lakes and their ecological integrity is maintained by hydrological connections between the floodplain and adjacent river channels. The Lower Balonne floodplain complex straddles the New South Wales (NSW) and Queensland (...
Article
Full-text available
There is growing enthusiasm to evaluate stream rehabilitation projects. We have undertaken the long process of conceiving, designing and implementing an evaluation of riparian revegetation on Victorian streams. Two approaches were initially considered: space­for­time substitution, whereby we try and learn about the impact of riparian replanting by...

Citations

... resulting in the loss of river length and habitat heterogeneity, altered lateral and longitudinal connectivity, and reduced nutrient and sediment retention (Tockner et al., 2008). Compounding these physical modifications, the proliferation of introduced species has become a key challenge impacting the ecological resilience of floodplain systems. ...
... For testing for statistical differences between the macroinvertebrate communities of three groups of sites with different land use, we used a test of similarity or ANOSIM. For ANOSIM and NMDS analyses, the matrix of abundance was transformed into a dissimilarity matrix using Bray-Curtis dissimilarity measure and 9999 permutations [57]. SIMPER analysis was used to detect macroinvertebrate orders responsible for separating each group. ...
... As interações biológicas entre as espécies na comunidade vegetal podem ser positivas ou negativas (James et al. 2015). Tal fato ocorre devido às semelhanças entre as características ambientais de um determinado ambiente, no que se refere principalmente às variáveis climáticas, solo e síndrome de dispersão (Miles, Grainger e Phillips 2004). ...
... As for other parts of the lower Condamine-Balonne catchment, flows in the Narran River are highly variable among years and when they occur they are of relatively high magnitude for short duration, with intervening years typically consisting of little or no flow (Thoms et al. 2002). Large floods typically reach the Narran Lakes after heavy rain in the upper Condamine-Balonne catchment in Queensland. ...
... The distribution of elements in pore waters can be heterogeneous compared to the water column (Griscom and Fisher, 2004) and could therefore cause some variance in specimens from the same population. However, A. helmsi are suspension feeders (Lautenschlager et al., 2014) and so regularly access the main water column. We did not investigate the chemistry of the pore water in this study, but it could be an interesting avenue for further investigation. ...
... (NASA, Washington, DC; Cheeseman & Stutz, 1996; freely available for download at https://ti.arc.nasa.gov/tech/rse/synthesis-projects-applications/autoclass/autoclass-c/). Previous hydrologic classifications have demonstrated the utility and robustness of this unsupervised fuzzy classification method (Jones et al., 2014;Kennard et al., 2010;Reidy Liermann et al., 2012;Webb et al., 2007). In contrast with other common fuzzy clustering routines such as fuzzy k-means, AutoClass calculates classes directly from the data and does not require users to specify the number of classes. ...
... Egg banks and emergence of microinvertebrates can be affected by a range of factors, including vegetation structure, hydrology, leaf litter, land use, water quality and biological interactions (Hann and Goldsborough 1997;Gleason et al. 2004;Ning and Nielsen 2011;Watkins et al. 2011;Nielsen et al. 2013;Zokan and Drake 2015). In contrast to these localised influences, the influence of landscape-scale factors such as physical location and wetland size remains relatively unstudied (Freiry et al. 2016). ...
... There is an increase in precipitation, flow levels flooding and a vertical increase in alluvial plains in active sedimentary areas affected by periodic floods [5]. Several studies describe the variability of physico-chemical properties of alluvial soils and sediments in different hydrological contexts [6,7,8,9,10]. The constant supply of alluvium transported by successive floods would have an impact on the physico-chemical properties of the sediments. ...
... Other algae can also compete with H. banksii zygotes reducing their survivorship . Finally, micrograzers such as copepods can remove H. banksii embryos and recruits (Bellgrove et al. 2014) but some grazers can remove competitors and indirectly benefit H. banksii embryos . Overall, it is clear that multiple abiotic and biotic factors influence the post-settlement survival of H. banksii and, even if gamete production varied over time, these factors may have contributed to the observed patterns of recruitment in H. banksii in this study. ...
... If source populations already possess plastic genotypes, they may be predisposed toward having a broad thermal niche (Ainsworth and Drake 2020), leading to similar thermal performance breadths in native and invasive populations. Alternatively, if the degree of thermal variation (e.g., temperature seasonality) differs in the native and introduced ranges, then thermal breadth could differ between invasive and native populations (Zerebecki and Sorte 2011;Bates et al. 2013), reflecting niche expansions or contractions. Further, genetic drift and admixture of source populations could result in maladaptive shifts of TPC parameters, such that thermal optimum and breadth differ in the invasive range despite similar thermal environments as the native range. ...