News from Centre for Ocean Life

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2019
02 MAY

A trait collection of marine fish species

We compiled 14 traits of 1700 marine fish species on three latitudinal gradients to facilitate large-scale studies on fish traits and functional diversity of fish communities...

29 APR

Silicified cell walls as a defensive trait in diatoms

Diatoms contribute nearly half of the marine primary production. These microalgae differ from other phytoplankton groups in having a silicified cell wall, which is the...

01 MAR

Honorable mention by the American Naturalist for our paper on evolution of reproductive...

Jellyfish are weird creatures that can reproduce in different modes both sexually and asexually. Similar functional strategies are also present in several other species...

25 FEB

Competition-defense tradeoff increases the diversity of microbial plankton communities...

Defense mechanisms are very common in unicellular plankton. A wide variety of these mechanisms (toxins, shell etc.) is observed and it is rather difficult to quantify...

22 FEB

Why are diatoms so successful?

A mechanistic model of diatoms reveals a conundrum. The defining physical attributes of diatoms – their silica shell and their large central vacuole – give diatoms an...

12 FEB

Resource limitation determines temperature response of unicellular plankton communities

Increases in temperature increase enzymatic activity, so one expects growth to also increase. However, this is not always the case. We show that when organisms are resource...

12 FEB

Climate change-induced shifts in the distribution of plankton alter the global...

Changes in the distribution of zooplankton in the North Atlantic during the past 55 years has led to major changes in the biological carbon pump.

07 FEB

When more is less: phytoplankton abundance drives behavior mediated cascades in...

Our traditional view of the interactions between marine organisms is conceptualized as food webs where species interact with one another mainly via direct consumption...

05 FEB

Changes in community traits of North Sea fish not similar in time and space

The North Sea fish community has a long history of intense fishing and environmental change. Scientific bottom trawl surveys, which have been ongoing in the North Sea...

28 JAN

Non-mechanistic traits and false trade-offs

Trade-offs are the cornerstone of trait-based ecology. They describe the advantages and costs of a certain trait, and thus determine when and where organisms with that...

21 JAN

New study identifies rapid developmental shifts in the thermal sensitivity of...

Ectotherms often grow to a smaller adult body size when reared in warmer conditions. Typically, this is because development rate increases faster than growth rate with...

10 JAN

Limited impact of big fish mothers for population replenishment

A new paper from the Center for Ocean Life shows that the implications of a recent Science paper by Barneche et al. (Science 360(6389): 642) are much less dramatic than...

10 JAN

Why are some flagellates living in a ribbon case?

Choanoflagellates are filter feeders and an important component of microbial foodwebs. Because they are the ancestors of multicellular life, they have been intensely...

04 JAN

Predator prey games in multiple habitats reveal mixed strategies in diel vertical...

Can we apply economic principles to fish ecology and diel vertical migration? It appears that the way fish and zooplankton behave in the presence of other individuals can...

2018
20 DEC

Happy Christmas and one final achievement for the year

After a wonderful annual retreat and Christmas party, it is now time to wish everyone a lovely Christmas and for most, safe travels to their home country.

18 DEC

The global biogeography of zooplankton foraging traits

Do zooplankton traits matter? Scaling up trade-offs to the global scale. Taxa-transcending traits and trade-offs have been shown through lab experiments and literature...

14 DEC

7th Annual Meeting of the Centre for Ocean Life

Centre's annual retreat took place in Hohenwarte 10-13 December to summarize the scientific success of 2018 and discuss future directions.

22 NOV

How does the trait distribution change between oligotrophic and eutrophic pelagic...

When we look at nutrient poor (oligotrophic) and nutrient rich (eutrophic) ecosystem, we generally observe different species. We can therefore conclude that these ecosystems...

05 SEP

Postdoctoral Fellowship Available

Postdoctoral fellowship opportunity on modelling of marine nitrogen fixation.

24 AUG

Copepods avoid eating Toxic Algae

Copepods avoid eating most toxic dinoflagellates and thus the toxin efficiently protects the algae against grazing

15 AUG

New paper: Modelling the cost of toxin production in phytoplankton

Is toxin production in phytoplankton costly? How do environmental conditions affect the cost of toxin production?

13 AUG

The trait based approach to Ocean Ecology

Marine ecosystems are overwhelmingly complex. The trait-based method offers a simple way to describe, model, and understand complex marine systems. In a new paper we...

06 AUG

New paper: Prey perception mechanism determines maximum clearance rates of planktonic...

What zooplankton foraging strategy is more efficient in terms of volume of water cleared? What mechanism determines clearance efficiency of zooplankton foraging strategies...

01 MAY

Crude oil spills can cause the initiation of harmful algal blooms (“red tides...

After oil spills and dispersant applications, the formation of red tides or harmful algal blooms (HABs) has been observed, but the link between both phenomena was unknown...

21 MAR

The Smell of Danger

Diatoms change chain-formation and up-or downregulate thousands of genes when smelling copepod grazers

21 MAR

New paper: Sex-specific starvation tolerance in planktonic copepods

Can sexual dimorphism lead to differences in starvation tolerance between copepod genders? Can mating activities reduce starvation tolerance in planktonic copepods?...

21 MAR

Global mismatch in marine conservation protection

A new Ocean Life paper demonstrates a global mismatch in the protection of multiple marine biodiversity components and ecosystem services.

24 JAN

Defence mechanisms in phytoplankton: traits and trade-offs

New review experimentally exploring plankton defense mechanism

24 JAN

Flying Copepods

Some copepods, mm-sized zooplankton, that live in the very surface layer of the ocean jump out of the water and perform spectacular flights when escaping from predators...

22 JAN

Implications of late-in-life density-dependent growth for fishery size-at-entry

Density dependence is the major driving force behind population regulation. Here we looked at density-dependent growth in real-life fish stocks, and how this relates...

17 JAN

How do copepods respond to toxic prey? And can the copepods acclimate to algal...

Many species of phytoplankton produce substances that are toxic to both human consumers and planktonic grazers, and toxin production is often considered a defense mechanism...

08 JAN

PhD positions at the Centre for Ocean Life

Centre for Ocean Life offers 3-year PhD fellowships in experimental plankton ecology and trait-based modelling within the general topic of trait-based Marine Ecology. The...

05 JAN

Temporal and spatial differences between taxonomic and trait biodiversity in a...

Biodiversity is a multifaceted concept, yet most biodiversity studies have taken a taxonomic approach, implying that all species are equally important. However, species...

2017
21 DEC

6th Annual Meeting of the Centre for Ocean Life

Centre's annual retreat took place 13-14/12 in Faxe to summarize the scientific success of 2017.

04 DEC

How do food-webs respond to climate change?

To understand the effects of climate change on changing ocean biomass, understanding how different species interact is a difficult but necessary task.

28 NOV

Global patterns in marine predatory fish

Why do we find primarily large pelagic predators such as tunas and billfish in the tropics, while in boreal and temperate regions large demersal species of gadoids and...

17 NOV

New paper on invasive species from ocean life

Life-history traits of comb jellies (Mnemiopsis) invaded to European waters start reproducing at a body mass 100 times less than in mother populations. This is consistent...

13 NOV

New postdoc at the Centre

We welcome a new postdoc at the Centre for Ocean life!

17 OCT

New PhD students at the Centre

We welcome two new PhD students at the Centre for Ocean life!

25 AUG

The Centre for Ocean Life has been extended for another 5 years to the end of...

Our application to the Villum Foundation for the extension of the Centre for Ocean Life has been granted. This is great news as it will allow us to continue the high level...

17 AUG

Copepod foraging behaviour shapes the functional response: new paper

Why search for food if there is little or nothing of it? And why spend a lot of effort foraging if there is plenty of it, particularly since foraging implies elevated...

15 AUG

New paper: Hydrodynamics of microbial filter feeding

What physical constraints govern microbial filter feeding, and what can we derive about the microbial filter feeder as a trait?

26 JUL

Welcome – Aurore and Jeremiah!

We welcome a new PhD student and Postdoc at the Centre for Ocean life!

27 JUN

Hans van Someren Gréve defended his PhD thesis

Copepods have developed two distinct behavioral strategies that have different costs and benefits when it comes to feeding, mating and avoiding predators. A new PhD thesis...

27 JUN

Gender dependent feeding rates in planktonic copepods

Can differences in behavior between genders lead to reduced male feeding rates?

05 APR

Life history strategies of the European Seas fish communities

What are the spatial patterns of fish life history strategies in the European Seas and what are their main drivers?

03 APR

New paper on predation risk in planktonic copepods

Differences in motile behavior related to feeding and mate finding lead up to almost an order of magnitude difference in mortality risk?

23 MAR

New paper on trophic strategies of unicellular plankton

We have developed a trait-based model to describe how the size of organisms and the environmental conditions interact to determine trophic strategies of unicellular plankton...

23 MAR

Benthic-pelagic coupling and ecosystem functioning in a changing world

How are the bottom substrate and water column habitats linked? How does this coupling affect the functioning of the ecosystem and how sensitive is it to human pressures...

13 MAR

New paper on an analytical model of flagellate hydrodynamics

We present an analytical model framework with which we can predict near-cell flows and trajectories of freely swimming unicellular organisms that swim with different numbers...

06 MAR

Calanus hyperboreus and the lipid pump

A new Ocean Life paper shows that overwintering of the copepod Calanus hyperboreus contributes significantly to the sequestration of carbon.  We propose a general method...

06 MAR

Trophic trait coupling and seasonal succession in plankton

In a new paper we reveal how the seasonal succession within plankton communities can be characterized in terms of a few key traits that govern the shifting trophic arrangements...

14 FEB

New data paper on marine copepod traits

We compiled data to understand the ecology of marine copepods based on their fundamental traits, such as body size or growth rate, rather than based on species names...

07 FEB

New paper on behaviour-dependent predation risk in zooplankton

What is the cost in terms of predation risk of different feeding behaviours in zooplankton? What feeding strategies are more risky?  Are copepod males more susceptible...

31 JAN

New paper on swimming and feeding of mixotrophic biflagellates

Imagine you are a microscopic cell with two thin “arms” and want to survive in the ocean. How should you arrange and move those appendages to swim fast and efficiently...

24 JAN

Philipp Brun defended his PhD thesis

Last Friday (20st Jan 2017) Philipp defended his PhD thesis with the title “Plankton biogeography – an exploration of patterns, drivers, functions, and predictability...

06 JAN

New paper - Dynamics of a physiologically structured population in a time-varying...

We have studied a model of a size structured Daphnia population feeding on an algae resource that have a periodically varying growth rate. Depending on parameter values...

03 JAN

5th Annual Meeting of the Centre for Ocean Life

5-year evaluation report of the Centre for Ocean Life available for download.

2016
21 DEC

New paper on behavior of copepods feeding on toxic algae

How do copepods react to toxic prey and what’s the effect on survival of both prey and predator?

28 NOV

When in life does density dependence occur in fish populations?

- and how should we fish them if we knew? New paper from Ocean Life.

09 NOV

Global susceptibility of ecosystems to jellyfish – new paper

In a new study, environmental effects on the competition between fish and jellyfish are examined through a trait-based food web model.

24 OCT

Ocean life article discussed on Videnskab.dk

A popular article discusses the findings of the recently published paper “Trait biogeography of marine copepods - an analysis across scales” by Brun, Payne and Kiørboe...

11 OCT

New paper on trait biogeography of marine copepods

We have produced the first ever global maps of key traits of copepods, the dominant group of zooplankton, by combining geo-located observations of hundreds of taxa that...

05 OCT

New paper on the sex-specific metabolic footprints of a copepod.

Copepods leave chemical traces in the water in which they live. Some of these chemicals may be signals of conspecifics. Can we find the signal molecules among the thousands...

03 OCT

The function of bacterioplankton communities in coastal waters – new paper

Coastal waters are among the most productive and biogeochemically active systems on Earth, and provide important ecosystem services in terms of biological productivity...

08 SEP

Living at the small scale – New paper

Microscopic aquatic organisms live in a non-intuitive ‘sticky’ world dominated by viscosity. The way that larger organisms swim does not function in this small-scale world...

03 SEP

Thermal traits of fish eggs indicate vulnerability of different species and stocks...

We conducted a meta-analysis to investigate and compare responses of development time, cumulative degree-days and survival of fish eggs from 32 populations of 17 species...

31 AUG

Modeling succession of key resource-harvesting traits of mixotrophic plankton...

New study from the Centre for Ocean Life shows the succession of three key resource-harvesting traits: photosynthesis, phagotrophy and inorganic nutrient uptake predicting...

28 AUG

New Ocean Life paper shows the fisheries efficiency in five large marine ecosystems

In a new paper in Fish and Fisheries Ocean life researchers investigate the efficiency of fishing in large marine ecosystems in Europe, Africa and North America.  They...

23 AUG

Small bugs with a big impact – New paper and report from two ASLO session on linking...

A new paper and a report from two ASLO sessions disuss the links between ecology and behavior of plankton and large scale oceanic processes, and how these links are important...

15 AUG

Differences in density dependence drive dual offspring size strategies in fish...

New study from the Centre for Ocean Life show how the huge differences in offspring size between sharks and bony fish can be explained by differences in early life density...

02 AUG

New paper shows the importance of allelochemicals promoting biodiversity

In a new Ocean Life paper, we show how allelochemicals released by toxic phytoplankton helps in the coexistence of more phytoplankton species than the number of limiting...

14 JUN

Life history theory reveals trade-offs reproductive traits across fish species

In a new Ocean Life paper, we examine life history traits of fish, and find a consistent empirical relationship between size at maturity, fecundity and spawning type...

01 JUN

New paper demonstrates remarkable physiological control over stolen chloroplasts...

This is the first evidence that organisms with stolen chloroplasts (kleptochloroplasts) can have significant control over the physiological state and ‘health’ of their...

23 MAY

Report on the 2nd workshop on “Trait-based Approaches to Ocean Life”

The report on the workshop is now available online.

23 MAY

Resident cod population benefits from the seasonal feast on fat herring - new...

Sometimes we don´t have to look in the distance to discover ecological spectacles worth studying, communicating, and preserving. 

11 MAY

New paper shows widespread body size reduction with seasonal warming in copepods

The first global synthesis of copepod temperature-body size (T-S) responses in nature across seasons, published in Global Ecology and Biogeography .

21 APR

Nature News Feature quotes Ocean Life tuna research

Ocean Life research on climate impacts on fish distributions has been quoted in the latest issue of Nature in a "News Feature" article about Greenland's future.  

18 APR

Our new PhD student - Esther Beukhof

We welcome a new PhD student at the Centre for Ocean life!

04 APR

How reliable are predictions of future plankton distributions? A new paper offers...

We find the reliability of predictions of distributional shifts of plankton made by commonly used ‘species distribution models’ to be worse than is commonly appreciated...

04 APR

New paper on diffusion approximations of moving organisms

A new and simple method for scaling up individual movements to large-scale fluxes of organisms .

29 MAR

New paper on how copepods percieve their prey

It remains a controversial issue how feeding-current feeding copepods perceive individual algal prey.

21 MAR

New paper on the patterns and drivers of fish communities in the Baltic Sea.

What are the patterns and drivers of the species richness and functional richness of fish communities in the Baltic Sea? A new paper explores the assembly rules controlling...

14 MAR

New Ocean Life paper: Offspring size in the ocean

A new paper explores patterns of offspring size for life in the ocean, from micro- to macroscopic.   

10 MAR

The metabolic footprint of copepods - New Paper

How do copepods use chemical signaling to communicate? The paper investigates the composition of  metabolites  exuded  from live copepods.

10 MAR

Popular science article in Aktuel Naturvidenskab: High functional richness despite...

How to and why measure functional diversity? Insights from a species poor Baltic Sea with a high functional richness.

15 FEB

Silicate-directed motility in diatoms

A recent study shows how diatoms find the building material for their cells walls.

18 JAN

New Ocean Life paper estimates the contribution of vertically migrating zooplankton...

PhD student Agnethe N. Hansen has recently published a paper in Limnology and Oceanography on the optimal diel vertical migration of zooplankton and its consequences for...

14 JAN

VILLUM Young Investigator Grant to Martin Lindegren

Martin has been awarded a prestigious Young Investigator's Grant to support his ambitious and exciting new research ideas.

07 JAN

4th Annual Meeting of the Centre for Ocean Life

Centre's annual retreat took place 10-11/12 in Søminestationen (Holbæk) to summarize the scientific success of 2015. Annual report available for download.

2015
30 DEC

New paper explores effects of warming on sexual size dimorphism in arthropods...

Data compilation study investigates the temperature control on the sexual size dimorphism within 85 diverse arthropod species  and reveals that, on average,  the sexes...

02 DEC

"Big fish or small fish": another successful PhD defense at the Centre.

Last Friday Nis Sand Jacobsen has successfully defended his PhD work investigating the ecosystem effects of fishing using size-based methods.

30 NOV

Popular scientific article in Aktuel Naturvidenskab: Why does organic carbon persist...

Massive amounts of organic carbon are floating around in the oceans. The carbon can persist for thousands of years, most likely because it is so dilute that the bacteria...

17 NOV

New Ocean Life paper compares ecosystem model predictions for fisheries management...

Nis S Jacobsen and Ken H Andersen from Centre for Ocean Life together with Tim Essington from University of Washington has published a paper looking at differences and...

11 NOV

Photo gallery papers in the Bulletin of ESA highlight work from the Centre.

Research of the Centre for Ocean Life features in the Ecological Society of America Photo Gallery.

23 OCT

Navish Wadhwa successfully defended his PhD!

Co-supervised by the Centre for Ocean Life, Navish defended his PhD work on "Zooplankton hydrodynamics". 

15 OCT

Centre for Ocean Life in the Discover Magazine!

Sachia Jo Traving discusses her research on biochemistry of free-living microbes and its implications for the Discover Magazine. 

21 SEP

New paper in Applied and Environmental Microbiology: “A Model Addressing Enzyme...

Vast amounts of carbon are stored in the ocean interior as dissolved organic matter. Bacteria and their extracellular enzymes are key for understanding the persistence...

21 SEP

Size and sensing in the ocean – new paper from the Centre from Ocean Life

Resulting from an interdisciplinary collaboration at the Centre for Ocean Life, “Size structures sensory hierarchy in ocean life” is now available online from Proceedings...

10 SEP

TOL2015 - Invitation to ALL marine researchers

DTU Aqua, Center for Ocean Life and the European Environment Agency will host a workshop on Transatlantic Ocean Literacy funded by the Danish Research Council (INP), during...

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News from Centre for Ocean Life

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19 SEPTEMBER 2019