Michael Oellermann

Michael Oellermann
Technische Universität München | TUM · Aquatic Systems Biology

PhD

About

45
Publications
7,026
Reads
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333
Citations
Citations since 2017
15 Research Items
281 Citations
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Introduction
All around the world, aquatic animals face warming waters, leading to range shifts and novel species interactions. My research aims to understand how aquatic invertebrates respond to rapid warming and how this influences unprecedented biotic interactions. To identify which drivers determine animal´s responses to warming, I study physiological traits at various levels combined with behavioural and inter-species experiments. I currently study those relations in highly invasive crayfish.
Additional affiliations
April 2020 - April 2021
Technische Universität München
Position
  • Fellow
Description
  • Factors driving invasion and continued expansion of the signal crayfish Pacifastacus leniusculus,
April 2017 - October 2020
University of Tasmania
Position
  • Fellow
Description
  • Predicting redistribution of spiny lobsters in an ocean warming hotspot
March 2015 - February 2017
Loligo Systems ApS
Position
  • Researcher
Description
  • Development of blood oxygen binding device.

Publications

Publications (45)
Preprint
Full-text available
Freely and openly shared low-cost electronic applications, known as open electronics, have sparked a new open-source movement, with much un-tapped potential to advance scientific research. Initially designed to appeal to electronic hobbyists, open electronics have formed a global community of "makers" and inventors and are increasingly used in scie...
Article
Full-text available
Improved public understanding of the ocean and the importance of sustainable ocean use, or ocean literacy, is essential for achieving global commitments to sustainable development by 2030 and beyond. However, growing human populations (particularly in mega-cities), urbanisation and socio-economic disparity threaten opportunities for people to engag...
Article
Full-text available
Marine species not only suffer from direct effects of warming oceans but also indirectly via the emergence of novel species interactions. While metabolic adjustments can be crucial to improve resilience to warming, it is largely unknown if this improves performance relative to novel competitors. We aimed to identify if spiny lobsters—inhabiting a g...
Article
Full-text available
Openly shared low-cost electronic hardware applications, known as open electronics, have sparked a new open-source movement, with much untapped potential to advance scientific research. Initially designed to appeal to electronic hobbyists, open electronics have formed a global “maker” community and are increasingly used in science and industry. In...
Article
Full-text available
Climate change increases the need to control range-extending species, which adversely impact their recipient ecosystem. Increasing populations of resident predators may be effective to counter such range-extension, but only if they consume the novel invaders at sufficient rates. In South-East Australia, poleward range-extending Longspined Sea Urchi...
Article
Full-text available
Species redistributions are one of the most prevalent changes observed in oceans worldwide due to climate change. One of the major challenges is being able to predict temperature-driven changes to species interactions and the outcome of these changes for marine communities due to the complex nature of indirect effects. In the ocean-warming hotspot...
Article
Full-text available
One of the most pronounced effects of climate change on the world's oceans is the (generally) poleward movement of species and fishery stocks in response to increasing water temperatures. In some regions, such redistributions are already causing dramatic shifts in marine socioecological systems, profoundly altering ecosystem structure and function,...
Preprint
Full-text available
Marine species not only suffer from direct effects of warming oceans but also indirectly via the emergence of novel species interactions. While metabolic adjustments can be crucial to improve resilience to warming, it is largely unknown if this improves performance relative to novel competitors. We aimed to identify if spiny lobsters – inhabiting a...
Preprint
Full-text available
(arXiv:2106.15852) Freely and openly shared low-cost electronic applications, known as open electronics, have sparked a new open-source movement, with much untapped potential to advance scientific research. Initially designed to appeal to electronic hobbyists, open electronics have formed a global community of "makers" and inventors and are increas...
Article
Full-text available
In an ocean warming hotspot off south-east Australia, many species have expanded their ranges polewards, including the eastern rock lobster, Sagmariasus verreauxi. This species is likely extending its range via larval advection into Tasmanian coastal waters, which are occupied by the more commercially important southern rock lobster, Jasus edwardsi...
Article
Full-text available
Climate‐driven species redistribution is pervasive and accelerating, yet the complex mechanisms at play remain poorly understood. The implications of large‐scale species redistribution for natural systems and human societies have resulted in a large number of studies exploring the effects on individual species and ecological communities worldwide....
Article
Full-text available
Understanding mechanisms of thermal sensitivity is key to predict responses of marine organisms to changing temperatures. Sustaining heart function is critical for complex organisms to oxygenate tissues, particularly under temperature stress. Yet, specific mechanisms that define thermal sensitivity of cardiac function remain unclear. Here we invest...
Article
Full-text available
The Antarctic Ocean hosts a rich and diverse fauna despite inhospitable temperatures close to freezing, which require specialist adaptations to sustain animal activity and various underlying body functions. While oxygen transport has been suggested to be key in setting thermal tolerance in warmer climates, this constraint is relaxed in Antarctic fi...
Article
Full-text available
Octopods have successfully colonised the world's oceans from the tropics to the poles. Yet, successful persistence in these habitats has required adaptations of their advanced physiological apparatus to compensate impaired oxygen supply. Their oxygen transporter haemocyanin plays a major role in cold tolerance and accordingly has undergone function...
Thesis
Full-text available
The Southern Ocean hosts a rich and diverse fauna that required specialist adaptations to colonize and persist at temperatures close to freezing. While much has been revealed about key adaptations in Antarctic fishes little is known about evolutionary strategies of other Antarctic ectotherms, particularly the abundant benthic incirrate octopods. Th...
Technical Report
Full-text available
The implementation of a pH microsensor and a miniature broad range spectrophotometer in a gas diffusion chamber facilitated the pH dependent analysis of blood oxygen binding properties. Parallel recordings of pH and pigment absorbance in only micro-volumes of unbuffered blood at freezing temperatures yielded highly resolved oxygen equilibrium curve...
Article
Full-text available
Haemocyanin is the respiratory protein of most of the Mollusca. In cephalopods and gastropods at least two distinct isoforms are differentially expressed. However, their physiological purpose is unknown. For the common cuttlefish Sepia officinalis, three isoforms are known so far, whereas for only two of them the complete mRNA sequences are availab...
Article
Full-text available
Oxygen equilibrium curves have been widely used to understand oxygen transport in numerous organisms. A major challenge has been to monitor oxygen binding characteristics and concomitant pH changes as they occur in vivo, in limited sample volumes. Here we report a technique allowing highly resolved and simultaneous monitoring of pH and blood pigmen...
Data
Oxygen equilibrium curves have been widely used to understand oxygen transport in numerous organisms. A major challenge has been to monitor oxygen binding characteristics and concomitant pH changes as they occur in vivo, in limited sample volumes. Here we report a technique allowing highly resolved and simultaneous monitoring of pH and blood pigmen...
Presentation
Full-text available
Presentation of project and of results of the first year
Article
Full-text available
In the eurythermal cuttlefish Sepia officinalis, performance depends on hearts that ensure systemic oxygen supply over a broad range of temperatures. We therefore aimed to identify adjustments in energetic cardiac capacity and underlying mitochondrial function supporting thermal acclimation and adaptation that could be crucial for the cuttlefish's...
Data
In the eurythermal cuttlefish Sepia officinalis, performance depends on hearts that ensure systemic oxygen supply over a broad range of temperatures. We therefore aimed to identify adjustments in energetic cardiac capacity and underlying mitochondrial function supporting thermal acclimation and adaptation that could be crucial for the cuttlefish's...
Article
Full-text available
In diabetic cardiomyopathy, ventricular dysfunction occurs in the absence of hypertension or atherosclerosis and is accompanied by altered myocardial substrate utilization and depressed mitochondrial respiration. It is not known if mitochondrial function differs across the left ventricular (LV) wall in diabetes. In the healthy heart, the inner sube...
Conference Paper
Full-text available
Cephalopod molluscs are exceptional athletic invertebrates that have evolved a high performance cardio-branchial system comprised of three hearts. As cellular powerhouses, mitochondria have central roles in aerobic heart function. This study tested the acute and chronic impacts of thermal challenges on acclimation and evolution of mitochondria from...
Article
The Stylonematophyceae is an early diverging red algal class that contains organisms in which sexual reproduc-tion has not been reported. Previous studies have hypothesized a single copy of the actin gene in this class. Amplification of the actin gene in members of the Stylonematophyceae, including several isolates of Sty-lonema alsidii, reveals a...
Conference Paper
Full-text available
Cuttlefish (Sepia officinalis) display diurnal changes in activity levels that are linked to the gas loading of the cuttle- bone, which regulates buoyancy (Denton and Gilpin-Brown, 1961). To investigate diurnal changes of standard and active metabolic rates, we analysed activity patterns of S. officinalis using new techniques of video tracking. We...

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