Browsing Articles by Author "Aschan, Michaela"
Now showing items 1-9 of 9
-
Change in Fish Community Structure in the Barents Sea
Aschan, Michaela; Fossheim, Maria; Greenacre, Michael; Primicerio, Raul (Journal article; Peer reviewed, 2013-04-29)Change in oceanographic conditions causes structural alterations in marine fish communities, but this effect may go undetected as most monitoring programs until recently mainly have focused on oceanography and commercial ... -
Climate change alters the structure of arctic marine food webs due to poleward shifts of boreal generalists
Kortsch, Susanne; Primicerio, Raul; Fossheim, Maria; Dolgov, Andrey V.; Aschan, Michaela (Journal article; Peer reviewed, 2015-09-07)Climate-driven poleward shifts, leading to changes in species composition and relative abundances, have been recently documented in the Arctic. Among the fastest moving species are boreal generalist fish which are expected ... -
Climate-driven changes in functional biogeography of Arctic marine fish communities
Frainer, André; Primicerio, Raul; Kortsch, Susanne; Aune, Magnus; Dolgov, Andrey V.; Fossheim, Maria; Aschan, Michaela (Peer reviewed; Journal article, 2017) -
Food-web structure varies along environmental gradients in a high-latitude marine ecosystem
Kortsch, Susanne; Primicerio, Raul; Aschan, Michaela; Lind, Sigrid; Dolgov, Andrey V.; Planque, Benjamin (Journal article; Peer reviewed, 2018)Large‐scale patterns in species diversity and community composition are associated with environmental gradients, but the implications of these patterns for food‐web structure are still unclear. Here, we investigated how ... -
Functional roles and redundancy of demersal Barents Sea fish: Ecological implications of environmental change
Aune, Magnus; Aschan, Michaela; Greenacre, Michael; Dolgov, Andrey V.; Fossheim, Maria; Primicerio, Raul (Journal article; Peer reviewed, 2018)When facing environmental change and intensified anthropogenic impact on marine ecosystems, extensive knowledge of how these systems are functioning is required in order to manage them properly. However, in high-latitude ... -
Increased functional diversity warns of ecological transition in the Arctic
Frainer, André; Primicerio, Raul; Dolgov, Andrey V.; Fossheim, Maria; Johannesen, Edda; Lind, Sigrid; Aschan, Michaela (Peer reviewed; Journal article, 2021)As temperatures rise, motile species start to redistribute to more suitable areas, potentially affecting the persistence of several resident species and altering biodiversity and ecosystem functions. In the Barents Sea, a ... -
Recruitment of shrimp (Pandalus borealis) in the Barents Sea related to spawning stock and environment
Aschan, Michaela; Ingvaldsen, Randi (Journal article; Peer reviewed, 2008-10)The shrimp spawn in autumn, and the females carry their eggs as out roe until spring when the larvae hatch. Within a period of 2 months the shrimp larvae settle to the bottom. It has been claimed that the year-class strength ... -
The role of marine mammals in the Barents Sea foodweb
Blanchet, Marie-Anne; Primicerio, Raul; Frainer, André; Kortsch, Susanne; Skern-Mauritzen, Mette; Dolgov, Andrey V.; Aschan, Michaela (Peer reviewed; Journal article, 2019)Marine mammals are important players in the Barents Sea ecosystem but their structural role in the foodweb has been little explored. We compare foodweb-related characteristics within and between phylogenetic groups for 19 ... -
A two-dimensional geostatistic method to simulate the precision of abundance estimates
Aschan, Michaela; Harbitz, Alf (Journal article; Peer reviewed, 2003)In this paper, we outline a geostatistic method to simulate the relative precision (coefficient of variation, CV) of total abundance estimates of one species in a predetermined, stratified area when it is appropriate to ...