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Short-and medium-term exposure to ocean acidification reduces olfactory sensitivity in gilthead seabream (2019)
Journal Article
Velez, Z., Roggatz, C., Benoit, D., Hardege, J., & Hubbard, P. C. (in press). Short-and medium-term exposure to ocean acidification reduces olfactory sensitivity in gilthead seabream. Frontiers in Physiology, https://doi.org/10.3389/fphys.2019.00731

The effects of ocean acidification on fish are only partially understood. Studies on olfaction are mostly limited to behavioural alterations of coral reef fish; studies on temperate species and/or with economic importance are scarce. The current stu... Read More

Free-sustaining three-dimensional S235 steel-based porous electrocatalyst for highly efficient and durable oxygen evolution (2018)
Journal Article
Han, W., Kuepper, K., Hou, P., Akram, W., Eickmeier, H., Hardege, J., …Schäfer, H. (2018). Free-sustaining three-dimensional S235 steel-based porous electrocatalyst for highly efficient and durable oxygen evolution. ChemSusChem, 11(20), 3661-3671. doi:10.1002/cssc.201801351

A novel oxygen evolution reaction (OER) catalyst (3D S235-P steel) based on steel S235 substrate has been successfully prepared via a facile one-step surface modification. The standard Carbon Manganese steel was phosphorizated superficially leading t... Read More

Pheromone (2018)
Book Chapter
Vaglio, S., Bartels-Hardege, H., Hardege, J., & Hardege, J. (2018). Pheromone. In Encyclopedia of Animal Cognition and Behavior, 1-11. Springer Publishing Company. doi:10.1007/978-3-319-47829-6_457-1

Target gene expression studies on Platynereis dumerilii and Platynereis cfr massiliensis at the shallow CO2 vents off Ischia, Italy (2017)
Journal Article
Wäge, J., Rotchell, J. M., Gambi, M., & Hardege, J. D. (2018). Target gene expression studies on Platynereis dumerilii and Platynereis cfr massiliensis at the shallow CO2 vents off Ischia, Italy. Estuarine, coastal and shelf science, 207, 351-358. doi:10.1016/j.ecss.2017.11.012

© 2017 Elsevier Ltd Many studies predict negative effects of ocean acidification on marine organisms, potentially leading to loss of biodiversity and ecosystem function. Research on species inhabiting naturally high pCO2 environments, such as volcani... Read More

The sibling polychaetes Platynereis dumerilii and Platynereis massiliensis in the Mediterranean Sea: are phylogeographic patterns related to exposure to ocean acidification? (2017)
Journal Article
Wäge, J., Valvassori, G., Hardege, J. D., Schulze, A., & Gambi, M. C. (2017). The sibling polychaetes Platynereis dumerilii and Platynereis massiliensis in the Mediterranean Sea: are phylogeographic patterns related to exposure to ocean acidification?. Marine Biology, 164(10), doi:10.1007/s00227-017-3222-x

High pCO2 environments, such as volcanic carbon dioxide (CO2) vents, which mimic predicted near-future scenarios of ocean acidification (OA), offer an opportunity to examine effects of low pH conditions on marine biodiversity and adaptation/acclimati... Read More

Cyanobacteria and microcystin contamination in untreated and treated drinking water in Ghana (2017)
Journal Article
Addico, G. N. D., Hardege, J. D., Kohoutek, J., DeGraft-Johnson, K. A. A., & Babica, P. (2017). Cyanobacteria and microcystin contamination in untreated and treated drinking water in Ghana. Advances in oceanography and limnology, 8(1), doi:10.4081/aiol.2017.6323. ISSN 1947-573X

Although cyanobacterial blooms and cyanotoxins represent a worldwide-occurring phenomenon, there are large differences among different countries in cyanotoxin-related human health risk assessment, management practices and policies. While national sta... Read More

Short-term effects of CO₂-induced low pH exposure on target gene expression in Platynereis dumerilii (2016)
Journal Article
Wäge, J., Rohr, S., Hardege, J. D., & Rotchell, J. M. (2016). Short-term effects of CO₂-induced low pH exposure on target gene expression in Platynereis dumerilii. Journal of Marine Biology and Oceanography, 5(2), doi:10.4172/2324-8661.1000155

Objective: Increasing atmospheric CO₂ concentration are causing changes to the seawater carbonate chemistry, lowering the pH and we study potential impacts of these changes at the molecular level in a non-calcifying, marine polychaete species Platyne... Read More

Electro-oxidation of Ni42 steel: A highly active bifunctional electrocatalyst (2016)
Journal Article
Schäfer, H., Chevrier, D. M., Zhang, P., Stangl, J., Müller-Buschbaum, K., Hardege, J. D., …Schmidt, M. (2016). Electro-oxidation of Ni42 steel: A highly active bifunctional electrocatalyst. Advanced Functional Materials, 26(35), 6402-6417. doi:10.1002/adfm.201601581

Janus type water‐splitting catalysts have attracted highest attention as a tool of choice for solar to fuel conversion. AISI Ni42 steel is upon harsh anodization converted into a bifunctional electrocatalyst. Oxygen evolution reaction (OER) and hydro... Read More

Ocean acidification affects marine chemical communication by changing structure and function of peptide signalling molecules (2016)
Journal Article
Roggatz, C. C., Lorch, M., Hardege, J. D., & Benoit, D. M. (2016). Ocean acidification affects marine chemical communication by changing structure and function of peptide signalling molecules. Global change biology, 22(12), (3914-3926). doi:10.1111/gcb.13354. ISSN 1354-1013

Ocean acidification is a global challenge that faces marine organisms in the near future with a predicted rapid drop in pH of up to 0.4 units by the end of this century. Effects of the change in ocean carbon chemistry and pH on the development, growt... Read More

Seizure control by decanoic acid through direct AMPA receptor inhibition (2015)
Journal Article
Chang, P., Augustin, K., Boddum, K., Williams, S., Sun, M., Terschak, J. A., …Williams, R. S. (2016). Seizure control by decanoic acid through direct AMPA receptor inhibition. Brain, 139(2), 431-443. https://doi.org/10.1093/brain/awv325

The medium chain triglyceride ketogenic diet is an established treatment for drug-resistant epilepsy that increases plasma levels of decanoic acid and ketones. Recently, decanoic acid has been shown to provide seizure control in vivo, yet its mechani... Read More

Exposure to low pH induces molecular level changes in the marine worm, Platynereis dumerilii (2015)
Journal Article
Lerebours, A., Hardege, J. D., Rotchell, J. M., & Wäge, J. (2016). Exposure to low pH induces molecular level changes in the marine worm, Platynereis dumerilii. Ecotoxicology and environmental safety, 124(February), (105-110). doi:10.1016/j.ecoenv.2015.10.008. ISSN 0147-6513

© 2015 Elsevier Inc. Fossil fuel emissions and changes in net land use lead to an increase in atmospheric CO 2 concentration and a subsequent decrease of ocean pH. Noticeable effects on organisms' calcification rate, shell structure and energy metabo... Read More

Oxidized mild steel S235: an efficient anode for the electrocatalytically initiated water-splitting (2015)
Journal Article
Schäfer, H., Küpper, K., Wollschläger, J., Kashaev, N., Hardege, J., Walder, L., …Dorn, F. (2015). Oxidized mild steel S235: an efficient anode for the electrocatalytically initiated water-splitting. ChemSusChem, 8(18), (3099-3110). doi:10.1002/cssc.201500666. ISSN 1864-5631

The surface of steel S235 was oxidized by Cl₂ gas and checked for its electrocatalytic efficiency regarding oxygen formation in aqueous solution. If exposed to humid Cl₂ gas for 110 min, steel S235 became an electrocatalyst that exhibits an overpoten... Read More

Stainless steel made to rust: a robust water-splitting catalyst with benchmark characteristics (2015)
Journal Article
Schäfer, H., Sadaf, S., Walder, L., Kuepper, K., Dinklage, S., Wollschläger, J., …Daum, D. (2015). Stainless steel made to rust: a robust water-splitting catalyst with benchmark characteristics. Energy & environmental science, 8(9), (2685-2697). doi:10.1039/c5ee01601k. ISSN 1754-5692

The oxygen evolution reaction (OER) is known as the efficiency-limiting step for the electrochemical cleavage of water mainly due to the large overpotentials commonly used materials on the anode side cause. Since Ni–Fe oxides reduce overpotentials oc... Read More

Effects of low seawater pH on the marine polychaete Platynereis dumerilii (2015)
Journal Article
Wäge, J., Hardege, J. D., Larsson, T. A., Simakov, O., Chapman, E. C., Arendt, D., & Rotchell, J. M. (2015). Effects of low seawater pH on the marine polychaete Platynereis dumerilii. Marine pollution bulletin, 95(1), 166-172. https://doi.org/10.1016/j.marpolbul.2015.04.027

An important priority for any organism is to maintain internal cellular homeostasis including acidbase balance. Yet, the molecular level impacts of changing environmental conditions, such as low pH, remain uncharacterised. Herein, we isolate partial... Read More

Adaptation and acclimatization to ocean acidification in marine ectotherms: an in situ transplant experiment with polychaetes at a shallow CO₂ vent system (2013)
Journal Article
Rastrick, S. P., de Guzman, H. J., Hardege, J. D., Spicer, J. I., Davidson, L., Hardege, J., …Spicer, J. (2013). Adaptation and acclimatization to ocean acidification in marine ectotherms: an in situ transplant experiment with polychaetes at a shallow CO₂ vent system. Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 368(1627), (0-0). doi:10.1098/rstb.2012.0444. ISSN 0962-8436

Metabolic rate determines the physiological and life-history performances of ectotherms. Thus, the extent to which such rates are sensitive and plastic to environmental perturbation is central to an organism's ability to function in a changing enviro... Read More

Divergence of scent pheromones in allopatric populations of Acanthodactylus boskianus (Squamata: Lacertidae) (2013)
Journal Article
Khannoon, E. R., Lunt, D. H., Schulz, S., & Hardege, J. (2013). Divergence of scent pheromones in allopatric populations of Acanthodactylus boskianus (Squamata: Lacertidae). Zoological Science, 30(5), (380-385). doi:10.2108/zsj.30.380. ISSN 0289-0003

The evolutionary phenomena associated with divergence in chemical signals between populations of the same species help to understand the process of speciation. Animals detect and react to semiochemicals and pheromones used in communication. Compariso... Read More

Identification of a female sex pheromone in Carcinus maenas (2011)
Journal Article
Bublitz, R., Walther, T., Welham, K., Davidson, L., Smith, M., Harley, M., …Terschak, J. (2011). Identification of a female sex pheromone in Carcinus maenas. Marine ecology progress series, 436, 177-189. doi:10.3354/meps09226

Despite major progress in our understanding of animal signaling systems, the identification of chemical signals in aquatic organisms is still in its infancy. Exemplary for this is the lack of structural knowledge of crustacean sex pheromones despite... Read More

Analytical challenges and the development of biomarkers to measure and to monitor the effects of ocean acidification (2011)
Journal Article
Hardege, J., Rotchell, J., Terschak, J., & Greenway, G. (2011). Analytical challenges and the development of biomarkers to measure and to monitor the effects of ocean acidification. Trends in Analytical Chemistry, 30(8), (1320-1326). doi:10.1016/j.trac.2011.07.004. ISSN 0165-9936

Changing ocean-carbonate chemistry caused by oceanic uptake of anthropogenic atmospheric carbon dioxide leads to the formation of carbonic acid, thus lowering the pH of the sea with predictions of a decrease from current levels at 8.15 to 7.82 by the... Read More

Simultaneously hermaphroditic shrimp use lipophilic cuticular hydrocarbons as contact sex pheromones (2011)
Journal Article
Hardege, J. D., Harley, M. A., Lin, J., Terschak, J. A., & Zhang, D. (2011). Simultaneously hermaphroditic shrimp use lipophilic cuticular hydrocarbons as contact sex pheromones. PloS one, 6(4), (e17720). doi:10.1371/journal.pone.0017720. ISSN 1932-6203

Successful mating is essentially a consequence of making the right choices at the correct time. Animals use specific strategies to gain information about a potential mate, which is then applied to decision-making processes. Amongst the many informati... Read More

The fecal odor of sick hedgehogs (Erinaceus europaeus) mediates olfactory attraction of the tick Ixodes hexagonus (2011)
Journal Article
Bunnell, T., Hanisch, K., Hardege, J. D., & Breithaupt, T. (2011). The fecal odor of sick hedgehogs (Erinaceus europaeus) mediates olfactory attraction of the tick Ixodes hexagonus. Journal of Chemical Ecology, 37(4), (340-347). doi:10.1007/s10886-011-9936-1. ISSN 0098-0331

Parasite loads of animals vary among individuals, but the underlying mechanisms have not been fully identified. Here, we investigated whether health status of hedgehogs (Erinaceus europaeus) is correlated with tick burden, and whether chemical cues l... Read More