A5084090601- Coral and Marine Ecosystems Studies
- Ocean Acidification Effects and Responses
- Marine and coastal plant biology
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Fish Ecology and Management Studies
- Marine animal studies overview
- Marine Sponges and Natural Products
- Methane Hydrates and Related Phenomena
- Environmental and Social Impact Assessments
- Aquaculture disease management and microbiota
- Calcium Carbonate Crystallization and Inhibition
- Marine Biology and Environmental Chemistry
- Reservoir Engineering and Simulation Methods
- CO2 Sequestration and Geologic Interactions
- Offshore Engineering and Technologies
Australian Institute of Marine Science
2011-2025
Google (United States)
2013
James Cook University
2012
The ecological effects of ocean acidification (OA) from rising atmospheric carbon dioxide (CO2) on benthic marine communities are largely unknown. We investigated in situ the consequences long-term exposure to high CO2 coral-reef-associated macroinvertebrate around three shallow volcanic seeps Papua New Guinea. densities many groups and number taxa (classes phyla) macroinvertebrates were significantly reduced at elevated (425-1100 µatm) compared with control sites. However, sensitivities...
Abstract Key calcifying reef taxa are currently threatened by thermal stress associated with elevated sea surface temperatures (SST) and reduced calcification linked to ocean acidification (OA). Here we undertook an 8 week experimental exposure near-future climate change conditions explored the microbiome response of corals Acropora millepora Seriatopora hystrix , crustose coralline algae Hydrolithon onkodes foraminifera Marginopora vertebralis Heterostegina depressa urchin Echinometra sp....
Crustose coralline algae (CCA) fulfill important ecosystem functions in coral reefs, including reef framework stabilization and induction of larval settlement. To investigate situ the effects high carbon dioxide on CCA communities, we deployed settlement tiles at three tropical volcanic CO2 seeps Papua New Guinea along gradients spanning from 8.1 to 7.4 pH. After 5 13 months deployment, there was a steep transition presence absence around pH 7.8 (660 μatm pCO2): 98% had > 7.8, whereas only...
Ocean acidification (OA) impacts the physiology of diverse marine taxa; among them corals that create complex reef framework structures. Biological processes operating on coral frameworks remain largely unknown from naturally high-carbon-dioxide (CO2) ecosystems. For first time, we independently quantified response multiple functional groups instrumental in construction and erosion these (accretion, macroboring, microboring, grazing) along natural OA gradients. We deployed blocks dead...
The future of coral reefs under increasing CO 2 depends on their capacity to recover from disturbances. To predict the recovery potential communities that are fully acclimatized elevated , we compared relative success recruitment and later life stages at two volcanic seeps adjacent control sites in Papua New Guinea. Our field experiments showed effects ocean acidification (OA) rates were up an order magnitude greater than survival growth established corals. Settlement rates, recruit juvenile...
Inshore coral reefs are experiencing the combined pressures of excess nutrient availability associated with coastal activities and warming seawater temperatures. Both known to have detrimental effects on early life history stages hard corals, but studies their demographic lacking. We conducted a series experiments test enrichment (three levels) elevated temperature (up five inshore Acropora tenuis, common species in Indo-Pacific Red Sea. Gamete fertilization, larval survivorship settlement...
Abstract Increasing carbon dioxide (CO2) emissions are raising sea surface temperature (SST) and causing ocean acidification (OA). While higher SST increases the frequency of mass coral bleaching events, it is unclear how OA will interact to affect this process. In study, we combine in situ surveys around three tropical CO2 seeps with a 2-month two-factor (CO2 temperature) tank experiment investigate combination susceptibility reef corals. Surveys at seep control sites during minor regional...
Abstract The effects of long-term exposure to elevated levels carbon dioxide (CO2) on seagrass communities are still poorly understood. This study investigates the tropical subtidal at three shallow volcanic CO2 vents in Papua New Guinea. Seagrass cover and biomass increased threefold fivefold, respectively, from control medium high pCO2 sites (average pH = 7.9, 7.7, 7.5, respectively). community composition differed significantly between sites: Cymodocea serrulata, rotundata, Halodule...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 456:127-137 (2012) - DOI: https://doi.org/10.3354/meps09687 Coral size, health and structural complexity: effects on ecology of a coral reef damselfish Sam H. C. Noonan1,3,*, Geoffrey P. Jones1,2, Morgan S. Pratchett2 1School Tropical Biology, 2ARC Centre Excellence for Reef Studies, James Cook University,...
We investigated ecological, physiological, and skeletal characteristics of the calcifying green alga Halimeda grown at CO2 seeps (pHtotal ∼ 7.8) compared them to those control reefs with ambient conditions 8.1). Six species were recorded both high sites. For two most abundant digitata opuntia we determined in situ light dark oxygen fluxes calcification rates, carbon contents stable isotope signatures. In species, rates increased site controls (131% 41%, respectively). dark, was not affected...
Phototrophic sessile organisms, such as reef corals, adjust their photosynthetic apparatus to optimize the balance of light capture versus protection in response variable availability (photoacclimation). In shallow marine environments, daily integrals (DLI) can vary several-fold water clarity and clouds. This laboratory study investigated responses two coral species fluctuations DLI. Corals were exposed four contrasting DLI treatments: 'high-light' (potentially photoinhibiting conditions, 32...
Increasing seawater temperatures are expected to have profound consequences for reef-building corals' physiology. Understanding how demography changes in response chronic exposure warming will help forecast coral communities respond climate change. Here, we measure growth rates of fragments four common species, while exposing them ranging from 19°C 31°C one month calibrate their thermal-performance curves (TPCs). Our results show that, there contrasting differences between the shape TPCs was...
Coral reefs worldwide are experiencing frequent disturbances, rendering coral recruitment critical for population recovery. This large-scale study identifies environmental, spatial, and biotic drivers of recruit densities at 141 stations stratified across seven regions three depths (1, 5, 15 m depths) with contrasting environmental conditions along the Great Barrier Reef Torres Strait. Settlement tiles were deployed two years, benthic cover quantified following retrieval. Benthic communities...
Ocean acidification (OA) is expected to negatively affect coral reefs, however little known about how OA will change the coral-algal symbiosis on which reefs ultimately depend. This study investigated whether there would be differences in Symbiodinium types response OA, potentially improving performance. We used denaturing gradient gel electrophoresis (DGGE) of internal transcribed spacer 2 (ITS2) region ribosomal DNA investigate dominant associating with six species scleractinian that were...
Climate change is causing rapid changes in reef structure, biodiversity, and function, though most sponges are predicted to tolerate conditions projected for 2100. Sponges maintain intimate relationships with microbial symbionts, previous studies suggesting that flexibility may be pivotal success under ocean acidification (OA). We performed a reciprocal transplantation of the coral Coelocarteria singaporensis Stylissa cf. flabelliformis between control site an adjacent CO2 vent Papua New...
Ocean acidification is expected to alter community composition on coral reefs, but its effects reef metabolism are poorly understood. Here we document how early successional benthic communities change in situ along gradients of carbon dioxide (CO2), and the consequences these changes rates photosynthesis, respiration, light dark calcification. Ninety standardised were grown PVC tiles deployed at two shallow-water volcanic CO2 seeps adjacent control sites Papua New Guinea. Along gradient,...
In situ effects of ocean acidification are increasingly studied at submarine CO2 vents. Here we present a preliminary investigation into the water chemistry and biology cool temperate vents near Whakaari–White Island, New Zealand. Water samples were collected inside three vent shafts, within distance 2m from shaft control sites. Vent contained both seawater pH on total scale (pHT) carbonate saturation states that severely reduced, creating conditions as predicted for beyond year 2100. showed...
Abstract Ocean acidification imposes many physiological, energetic, structural and ecological challenges to stony corals. While some corals may increase autotrophy under ocean acidification, another potential mechanism alleviate of the adverse effects on their physiology is heterotrophy. We compared feeding rates Galaxea fascicularis colonies that have lived entire lives conditions at natural carbon dioxide (CO 2 ) seeps with living present-day CO conditions. When provided same quantity...