Nettsider med emneord «Competition»

two dell picture symbolysing cold years and warm years withe effect on cod and haddock
Publisert 10. aug. 2020 12:16

In the Boreal-Arctic seas, the two most abundant gadoid fish are the Atlantic cod (Gadus morhua) and the haddock (Melanogrammus aeglefinus). Both tend to respond to climate warming by an abundance increase and a change of distribution. Are these changes affecting how they are interacting? Statistical analysis using a state-space threshold model of acoustic and trawl survey data on cod and haddock abundance indicates that the interaction is changing with sea temperature: the cod negatively affecting the haddock when sea temperature is over 4 °C.

Publisert 2. feb. 2018 15:20

In a study recently published in Ecology we find apparent competition between major zooplankton groups in a large marine ecosystem. Apparent competition is an indirect, negative interaction between two species or species groups mediated by a third species other than their prey.

Publisert 24. apr. 2015 10:59

Climate warming is known to affect predator-prey relationship and phenology. Less is known about competitive relationships specifically in a nonlinear framework. In a recent study, we studied this topic on…

passerine birds.

Publisert 28. nov. 2014 00:00

Short supplies of adequate nesting sites and food resources are often associated in discussions of the ultimate factors controlling seabird population size, distribution and breeding success. Shift of prey distribution may affect the interaction between seabirds breeding at the same site. 

Publisert 11. nov. 2014 12:40

Understanding the interaction between species is particularly actual in marine systems where ecosystem approach of  management is desirable. This is particularly the case in high latitude systems such as the Barents Sea where climate change effect is supposed to be the strongest.

Publisert 26. mars 2014 21:04