Bartels, N, Camp, EF, Dilernia, NJ & Suggett, DJ 2024, 'Regulation of cultured coral endosymbiont photophysiology by alternate heat stress protocols', Marine Biology, vol. 171, no. 1.
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Buckley, T, Vuong, T, Karanam, K, Vo, PHN, Shukla, P, Firouzi, M & Rudolph, V 2024, 'Response to ‘Comment on “Using foam fractionation to estimate PFAS air-water interface adsorption behaviour at ng/L and µg/L” by T. Buckley, T. Vuong, K. Karanam, P.H.N. Vo, P. Shukla, M. Firouzi & V. Rudolph, Water research 239, 120028’', Water Research, vol. 249, pp. 120811-120811.
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Cotter, DJ, Severson, AL, Kang, JTL, Godrej, HN, Carmi, S & Rosenberg, NA 2024, 'Modeling the effects of consanguinity on autosomal and X-chromosomal runs of homozygosity and identity-by-descent sharing', G3: Genes, Genomes, Genetics, vol. 14, no. 2.
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Abstract Runs of homozygosity (ROH) and identity-by-descent (IBD) sharing can be studied in diploid coalescent models by noting that ROH and IBD-sharing at a genomic site are predicted to be inversely related to coalescence times—which in turn can be mathematically obtained in terms of parameters describing consanguinity rates. Comparing autosomal and X-chromosomal coalescent models, we consider ROH and IBD-sharing in relation to consanguinity that proceeds via multiple forms of first-cousin mating. We predict that across populations with different levels of consanguinity, (1) in a manner that is qualitatively parallel to the increase of autosomal IBD-sharing with autosomal ROH, X-chromosomal IBD-sharing increases with X-chromosomal ROH, owing to the dependence of both quantities on consanguinity levels; (2) even in the absence of consanguinity, X-chromosomal ROH and IBD-sharing levels exceed corresponding values for the autosomes, owing to the smaller population size and lower coalescence time for the X chromosome than for autosomes; (3) with matrilateral consanguinity, the relative increase in ROH and IBD-sharing on the X chromosome compared to the autosomes is greater than in the absence of consanguinity. Examining genome-wide SNPs in human populations for which consanguinity levels have been estimated, we find that autosomal and X-chromosomal ROH and IBD-sharing levels generally accord with the predictions. We find that each 1% increase in autosomal ROH is associated with an increase of 2.1% in X-chromosomal ROH, and each 1% increase in autosomal IBD-sharing is associated with an increase of 1.6% in X-chromosomal IBD-sharing. For each calculation, particularly for ROH, the estimate is reasonably close to the increase of 2% predicted by the population-size difference between autosomes and X chromosomes. The results support the utility of coalescent models for understanding patterns of genomic sharing an...
Dilernia, NJ, Woodcock, S, Camp, EF, Hughes, DJ, Kühl, M & Suggett, DJ 2024, 'Intra‐colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species', Ecology and Evolution, vol. 14, no. 3, p. e11100.
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AbstractOxygen (O2) availability is essential for healthy coral reef functioning, yet how continued loss of dissolved O2 via ocean deoxygenation impacts performance of reef building corals remains unclear. Here, we examine how intra‐colony spatial geometry of important Great Barrier Reef (GBR) coral species Acropora may influence variation in hypoxic thresholds for upregulation, to better understand capacity to tolerate future reductions in O2 availability. We first evaluate the application of more streamlined models used to parameterise Hypoxia Response Curve data, models that have been used historically to identify variable oxyregulatory capacity. Using closed‐system respirometry to analyse O2 drawdown rate, we show that a two‐parameter model returns similar outputs as previous 12th‐order models for descriptive statistics such as the average oxyregulation capacity (Tpos) and the ambient O2 level at which the coral exerts maximum regulation effort (Pcmax), for diverse Acropora species. Following an experiment to evaluate whether stress induced by coral fragmentation for respirometry affected O2 drawdown rate, we subsequently identify differences in hypoxic response for the interior and exterior colony locations for the species Acropora abrotanoides, Acropora cf. microphthalma and Acropora elseyi. Average regulation capacity across species was greater (0.78–1.03 ± SE 0.08) at the colony interior compared with exterior (0.60–0.85 ± SE 0.08). Moreover, Pcmax occurred at relatively low pO2 of <30% (±1.24; SE) air saturation for a...
Espinoza-Corral, R, Iwai, M, Zavřel, T, Lechno-Yossef, S, Sutter, M, Červený, J, Niyogi, KK & Kerfeld, CA 2024, 'Phycobilisome protein ApcG interacts with PSII and regulates energy transfer in Synechocystis', Plant Physiology, vol. 194, no. 3, pp. 1383-1396.
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Abstract Photosynthetic organisms harvest light using pigment–protein complexes. In cyanobacteria, these are water-soluble antennae known as phycobilisomes (PBSs). The light absorbed by PBS is transferred to the photosystems in the thylakoid membrane to drive photosynthesis. The energy transfer between these complexes implies that protein–protein interactions allow the association of PBS with the photosystems. However, the specific proteins involved in the interaction of PBS with the photosystems are not fully characterized. Here, we show in Synechocystis sp. PCC 6803 that the recently discovered PBS linker protein ApcG (sll1873) interacts specifically with PSII through its N-terminal region. Growth of cyanobacteria is impaired in apcG deletion strains under light-limiting conditions. Furthermore, complementation of these strains using a phospho-mimicking version of ApcG causes reduced growth under normal growth conditions. Interestingly, the interaction of ApcG with PSII is affected when a phospho-mimicking version of ApcG is used, targeting the positively charged residues interacting with the thylakoid membrane, suggesting a regulatory role mediated by phosphorylation of ApcG. Low-temperature fluorescence measurements showed decreased PSI fluorescence in apcG deletion and complementation strains. The PSI fluorescence was the lowest in the phospho-mimicking complementation strain, while the pull-down experiment showed no interaction of ApcG with PSI under any tested condition. Our results highlight the importance of ApcG for selectively directing energy harvested by the PBS and imply that the phosphorylation status of ApcG plays a role in regulating energy transfer from PSII to PSI.
Gill, RL, Fleck, R, Chau, K, Westerhausen, MT, Lockwood, TE, Violi, JP, Irga, PJ, Doblin, MA & Torpy, FR 2024, 'Fine particle pollution during megafires contains potentially toxic elements', Environmental Pollution, vol. 344, pp. 123306-123306.
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Hinners, J, Argyle, PA, Walworth, NG, Doblin, MA, Levine, NM & Collins, S 2024, 'Multi-trait diversification in marine diatoms in constant and warmed environments.', Proc Biol Sci, vol. 291, no. 2019, p. 20232564.
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Phytoplankton are photosynthetic marine microbes that affect food webs, nutrient cycles and climate regulation. Their roles are determined by correlated phytoplankton functional traits including cell size, chlorophyll content and cellular composition. Here, we explore patterns of evolution in interrelated trait values and correlations. Because both chance events and natural selection contribute to phytoplankton trait evolution, we used population bottlenecks to diversify six genotypes of Thalassiosirid diatoms. We then evolved them as large populations in two environments. Interspecific variation and within-species evolution were visualized for nine traits and their correlations using reduced axes (a trait-scape). Our main findings are that shifts in trait values resulted in movement of evolving populations within the trait-scape in both environments, but were more frequent when large populations evolved in a novel environment. Which trait relationships evolved was population-specific, but greater departures from ancestral trait correlations were associated with lower population growth rates. There was no single master trait that could be used to understand multi-trait evolution. Instead, repeatable multi-trait evolution occurred along a major axis of variation defined by several diatom traits and trait relationships. Because trait-scapes capture changes in trait relationships and values together, they offer an insightful way to study multi-trait variation.
Parker, LM, Scanes, E, O'Connor, WA, Dove, M, Elizur, A, Pörtner, H-O & Ross, PM 2024, 'Resilience against the impacts of climate change in an ecologically and economically significant native oyster', Marine Pollution Bulletin, vol. 198, pp. 115788-115788.
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Scanes, E, Kutti, T, Fang, JKH, Johnston, EL, Ross, PM & Bannister, RJ 2024, 'The long-lived deep-sea bivalve Acesta excavata is sensitive to the dual stressors of sediment and warming', Marine Pollution Bulletin, vol. 202, pp. 116323-116323.
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Seymour, JR, Brumley, DR, Stocker, R & Raina, J-B 2024, 'Swimming towards each other: the role of chemotaxis in bacterial interactions', Trends in Microbiology.
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Siboni, N, King, WL, Williams, NLR, Scanes, E, Giardina, M, Green, TJ, Ostrowski, M, O'Connor, W, Dove, M, Labbate, M & Seymour, JR 2024, 'Increased abundance of potentially pathogenic Vibrio and a marine heatwave co-occur with a Pacific Oyster summer mortality event', Aquaculture, vol. 583, pp. 740618-740618.
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Strudwick, P, Camp, EF, Seymour, J, Roper, C, Edmondson, J, Howlett, L & Suggett, DJ 2024, 'Impacts of plastic‐free materials on coral‐associated bacterial communities during reef restoration', Environmental Microbiology Reports, vol. 16, no. 1.
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AbstractCoral propagation and out‐planting based restoration approaches are increasingly being applied to assist natural recovery of coral reefs. However, many restoration methods rely on plastic zip‐ties to secure coral material which is potentially problematic for the marine environment. Plastic‐free biodegradable alternatives may however pose unique risks to coral‐associated bacterial communities integral to coral health. Therefore, to identify whether biodegradable materials differentially impact coral‐associated bacterial communities we examined Acropora millepora coral‐associated bacterial communities during propagation in two experiments on the Great Barrier Reef. Coral fragments were secured to coral nurseries with conventional plastic, metal, or biodegradable (polyester and polycaprolactone) ties. Tie failure and coral‐associated bacterial communities were then characterized over six months. Minimal coral mortality was observed (3.6%–8%) and all ties had low failure rates (0%–4.2%) except for biodegradable polyester ties (29.2% failure). No differences were observed between coral‐associated bacterial communities of fragments secured with different ties, and no proliferation of putatively pathogenic bacteria was recorded. Overall, our findings suggest that reducing reliance on conventional plastic is feasible through transitions to biodegradable materials, without any notable impacts on coral‐associated bacterial communities. However, we caution the need to examine more coral taxa of different morphologies and new plastic‐free materials prior to application.
Vo, PHN, Danaee, S, Hai, HTN, Huy, LN, Nguyen, TAH, Nguyen, HTM, Kuzhiumparambil, U, Kim, M, Nghiem, LD & Ralph, PJ 2024, 'Biomining for sustainable recovery of rare earth elements from mining waste: A comprehensive review', Science of The Total Environment, vol. 908, pp. 168210-168210.
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Vo, PHN, Ky Le, G, Huy, LN, Zheng, L, Chaiwong, C, Nguyen, NN, Nguyen, HTM, Ralph, PJ, Kuzhiumparambil, U, Danaee, S, Toft, S, Madsen, C, Kim, M, Fenstermacher, J, Hai, HTN, Duan, H & Tscharke, B 2024, 'Occurrence, spatiotemporal trends, fate, and treatment technologies for microplastics and organic contaminants in biosolids: A review', Journal of Hazardous Materials, vol. 466, pp. 133471-133471.
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Vo, PHN, Nguyen, TTP, Nguyen, HTM, Baulch, J, Dong, S, Nguyen, CV, Thai, PK & Nguyen, AV 2024, 'PFAS removal from landfill leachate by ozone foam fractionation: System optimization and adsorption quantification', Water Research, vol. 253, pp. 121300-121300.
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Windhagauer, M, Doblin, MA, Signal, B, Kuzhiumparambil, U, Fabris, M & Abbriano, RM 2024, 'Metabolic response to a heterologous poly-3-hydroxybutyrate (PHB) pathway in Phaeodactylum tricornutum', Applied Microbiology and Biotechnology, vol. 108, no. 1, pp. 1-16.
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