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Katherine R. O'Brien
Information Technology University
EcologySeagrassPhytoplanktonEnvironmental scienceBiology
80Publications
18H-index
1,026Citations
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Publications 87
Newest
#1Matthew P. AdamsH-Index: 10
#2Edwin J.Y. Koh (UQ: University of Queensland)
Last. Katherine R. O'Brien (UQ: University of Queensland)H-Index: 18
view all 10 authors...
Abstract Seagrass ecosystems are increasingly subjected to multiple interacting stressors, making the consequent trajectories difficult to predict. Here, we present a new process-based model of seagrass decline in response to cumulative light and temperature stress. The model is calibrated to laboratory datasets for Great Barrier Reef seagrasses using Bayesian inference. Our model, which is fit to both physiological and morphological data, supports the hypothesis that physiological carbon loss r...
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#1Man Xiao (Griffith University)H-Index: 7
#2David P. Hamilton (Griffith University)H-Index: 45
Last. Michele Astrid Burford (Griffith University)H-Index: 37
view all 6 authors...
Abstract Predicting algal population dynamics using models informed by experimental data has been used as a strategy to inform the management and control of harmful cyanobacterial blooms. We selected toxic bloom-forming species Microcystis spp. and Raphidiopsis raciborskii (basionym Cylindrospermopsis raciborskii) for further examination as they dominate in 78 % and 17 %, respectively, of freshwater cyanobacterial blooms (cyanoHABs) reported globally over the past 30 years. Field measurements of...
1 CitationsSource
#1Amanda D. Neilen (Griffith University)H-Index: 3
#2Anthony Richard Carroll (Griffith University)H-Index: 33
Last. Michele Astrid Burford (Griffith University)H-Index: 37
view all 5 authors...
Abstract Previous studies have shown that under laboratory conditions, dissolved organic matter (DOM) leached from plants can be differentially more phytotoxic to cyanobacteria, compared to green algae. This study examined how DOM source and transformation processes (microbial and photochemical) affect its chemical composition and phytotoxicity towards a cultured species of cyanobacteria (Raphidiopsis raciborskii) using a factorial experimental design. To complement cyanobacterial bioassays, the...
2 CitationsSource
#1Tracy Roxbury (UQ: University of Queensland)H-Index: 3
#2Katie L. McMahon (QUT: Queensland University of Technology)H-Index: 46
Last. David A. Copland (UQ: University of Queensland)H-Index: 34
view all 10 authors...
The majority of task-based fMRI studies examining the neural mechanisms of aphasia recovery have been in the chronic phase, where people with aphasia typically employ both intact language areas, as well as recruiting additional areas within the left hemisphere and right hemisphere language homologues (Turkeltaub, Messing, Norise, & Hamilton, 2011). However, recovery from post-stroke aphasia (or language impairment) occurs in a number of stages, each underpinned by distinct neural mechanisms (Kir...
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#1Katherine R. O'Brien (UQ: University of Queensland)H-Index: 18
#2Milena Holmgren (WUR: Wageningen University and Research Centre)H-Index: 31
Last. Brian Head (UQ: University of Queensland)H-Index: 24
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Why do inequalities persist between male and female scientists, when the causes are well-researched and widely condemned? In part, because equality has many dimensions. Presenting eight definitions of gender equality, we show each is important but incomplete. Rigid application of any single equality indicator can therefore have perverse outcomes.
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#1Saphira Rekker (UQ: University of Queensland)H-Index: 5
#2Jacquelyn E. Humphrey (UQ: University of Queensland)H-Index: 10
Last. Katherine R. O'Brien (UQ: University of Queensland)H-Index: 18
view all 3 authors...
The 2015 Paris Agreement set a global warming limit of 2°C above preindustrial levels. Corporations play an important role in achieving this objective, and methods have recently been developed to map global climate targets to specific industries, and individual corporations within those industries. In this article, we assess whether Sustainability ratings capture corporate performance in meeting the 2°C target. We analyze nine rating schemes used by investors and three commonly used in academic ...
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#1Matthew J. Prentice (Griffith University)H-Index: 2
#2David P. Hamilton (Griffith University)H-Index: 45
Last. Michele Astrid Burford (Griffith University)H-Index: 37
view all 5 authors...
Phosphorus (P) is a key driver of phytoplankton growth in lentic systems. During summer-stratified periods when dissolved inorganic P (DIP) is low, the phytoplankton assemblage often has elevated P uptake rates. Under these conditions, dissolved organic P (DOP) can become an important source of P for phytoplankton and a driver of phytoplankton succession. We examined how DOP mineralisation by alkaline phosphatase (AP) activity (APA), relative to phytoplankton P release (i.e., from exudation and ...
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#1Paul S. MaxwellH-Index: 18
#1Paul S. MaxwellH-Index: 1
view all 11 authors...
Seagrasses are a dominant feature in the seascape of Moreton Bay. They host numerous animals and provide the region with a wide range of ecosystem services that we are only beginning to better understand. In the past 20 years, the focus of seagrass research in Moreton Bay has shifted towards predictive modelling based on comprehensive ecological understanding. There are seven species of seagrasses in Moreton Bay that persist across a wide range of environmental conditions from muddy sediments in...
#2Matthew P. AdamsH-Index: 10
Last. Katherine R. O'BrienH-Index: 18
view all 10 authors...
#1Tracy RoxburyH-Index: 3
#2Katie L. McMahonH-Index: 46
Last. David A. CoplandH-Index: 34
view all 10 authors...
Recovery from post-stroke aphasia is highly variable1 and there is currently no effective method of predicting individual recovery of symptoms to guide rehabilitation. This project addresses the lack of knowledge regarding brain mechanisms responsible for aphasia recovery to provide much needed specificity in determining the best predictors of recovery for language symptoms commonly targeted in rehabilitation. Aim 1: Determine whether subacute language-related brain activity predicts subsequent ...
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