A5089474444- Avian ecology and behavior
- Marine and fisheries research
- Fish Ecology and Management Studies
- Animal Behavior and Reproduction
- Climate variability and models
- Wildlife Ecology and Conservation
- Plant and animal studies
- Species Distribution and Climate Change
- COVID-19 epidemiological studies
- Genetic and phenotypic traits in livestock
- Bird parasitology and diseases
- Animal Ecology and Behavior Studies
- Isotope Analysis in Ecology
- Marine animal studies overview
- Migration and Labor Dynamics
- Oceanographic and Atmospheric Processes
- Marine and coastal plant biology
- Wildlife Conservation and Criminology Analyses
- Ancient Near East History
- Coral and Marine Ecosystems Studies
- Rangeland and Wildlife Management
- Sustainability and Climate Change Governance
- Census and Population Estimation
- Zoonotic diseases and public health
- Ecology and biodiversity studies
Stockholm University
2015-2024
Stockholm Resilience Centre
2012-2023
Swedish University of Agricultural Sciences
2017
British Antarctic Survey
1997-2002
Natural Environment Research Council
2002
Swedish Museum of Natural History
2002
Uppsala University
1996-1999
Swedish Research Council
1999
The abundance and availability of food are critical determininants reproductive success population dynamics marine top predators. However, recent work has indicated that the quality may also be critically important for some ‘junkfood hypothesis’ was originally suggested as a potential explanation dramatic decline Stellers sea lions Eumetopias jubatus in Gulf Alaska. According to hypothesis, dietary switch prey low energy content led detrimental effects on lions. A number observations...
The widespread lockdowns put in place to limit the spread of new coronavirus disease (COVID-19) offers a rare opportunity understanding how human presence influence ecosystems. Using data from long-term seabird monitoring, we reveal previously concealed guarding effect by tourist groups on an iconic colony Baltic Sea. absence tourists 2020 lead sevenfold increase white-tailed eagles Haliaeetus albicilla, their disturbance breeding common murres Uria aalge and causing 26% lower murre...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 323:233-238 (2006) - doi:10.3354/meps323233 Fish, seabirds and trophic cascades in Baltic Sea Henrik Österblom1,*, Michele Casini2, Olof Olsson3, Anders Bignert4 1Stockholm University, Department of Systems Ecology, 106 91 Stockholm, Sweden 2Swedish Board Fisheries, Institute Research, PO Box 4, 453 21...
Climate change research on seabirds has so far focused mainly indirect effects acting via impacts at lower trophic levels. However, that breed in exposed sites may also be vulnerable to direct from extreme weather events such as heatwaves, which are projected increase both severity and frequency with climate change. Yet there relatively few field studies of how breeding respond heatwaves. Here, we used video footage a colony common guillemots Uria aalge the Baltic Sea over 4 consecutive...
King Penguins Aptenodytes patagonicus which were rearing chicks studied during three summers from November 1991 to March 1994 at South Georgia. Stomach samples ( n =115) collected by flushing had a mean mass of 1308 g. Fish was allocated each species based on the relationship between fish and otolith length. Three mesopelagic lanternfishes (Myctophidae), Krefftichthys anderssoni, Electrona carlsbergi Protomyctophum choriodon , dominated diet both numbers mass. They small with 3–7 Overall, K....
During 1988–1992, 684 scats were collected throughout the year in territory of only reproducing family group (mean five individuals) wolves Canis lupus Scandinavia. Moose Alces alces , roe deer Capreolus capreolus and badger Meles meles constituted three most important prey species, hair from them was found 52%, 50%, 19% scats, respectively. When compensating for different area/volume ratios species size, these estimated to constitute 97% biomass ingested. The proportions moose, deer, 66%,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 444:239-249 (2012) - DOI: https://doi.org/10.3354/meps09417 Contrasting effects of food quality and quantity on a marine top predator M. Kadin1,*, H. Österblom1,2, J. Hentati-Sundberg1, O. Olsson1 1Stockholm Resilience Centre, Stockholm University, 106 91 Stockholm, Sweden 2Baltic Nest Institute, *Email:...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 475:277-289 (2013) - DOI: https://doi.org/10.3354/meps10125 Foraging behaviour of common murres in Baltic Sea, recorded by simultaneous attachment GPS and time-depth recorder devices Thomas J. Evans1,*, Martina Kadin2, Olof Olsson2, Susanne Åkesson1 1Centre for Animal Movement Research, Department Biology,...
Abstract Ecological research and monitoring need to be able rapidly convey information that can form the basis of scientifically sound management. Automated sensor systems, especially if combined with artificial intelligence, contribute such rapid high‐resolution data retrieval. Here, we explore prospects automated methods generate insights for seabirds, which are often monitored their high conservation value being sentinels marine ecosystem changes. We have developed a system video...
When King Penguin Aptenodytes patagonicus males arrive on the breeding grounds to start courtship, their energy reserves must sustain them during a fast lasting about five weeks, including firs ...
There was a seasonal biomodality in the distribution of breeding activities King Penguins Aptenodytes patagonicus, studied from 1991 to 1994 at South Georgia, with peaks courtship and egg-laying 2-3 months apart. The late peak birds that bred successfully previous year, whereas early had failed. Successful were delayed because median time for complete cycle, including moult, > 14 month. Although most made attempt each none two consecutive seasons. Hence, practice cycle biennial. period...
Biologging devices are providing detailed insights into the behaviour and movement of animals in their natural environments. It is usually assumed that this method gathering data does not impact on observed. However, potential negative effects birds have rarely been investigated before field‐based studies initiated. Seabirds which both fly use pursuit diving may be particularly sensitive to increases drag load resulting from carrying biologging devices. We studied chick‐rearing adult common...
In long-lived and monogamous species, with partners separated between breeding seasons, the previous mate usually returns waiting is therefore rewarded, thus contributing to retention as a ...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 224:305-309 (2001) - doi:10.3354/meps224305 A decrease in fledging body mass common guillemot Uria aalge chicks Baltic Sea Henrik Österblom1,*, Anders Bignert2, Thord Fransson3, Olof Olsson4 1Department of Vertebrate Zoology, 2Contaminant Research Group, and 3Bird Ringing Centre, Swedish Museum Natural...
The quantity and quality of food available within the foraging area set important constraints for chick‐rearing birds, but responses to low are not well understood. This study explored potential parent birds adjust (feeding rate) (energy content) in chick provisioning, by studying Common Guillemots Uria aalge on Stora Karlsö, Baltic Sea, predominantly utilizing Sprat Sprattus sprattus , during conditions high reduced quality. Quality is central reproductive success this single‐prey loader....
Many key ecological dynamics such as biomass distributions are only detectable on a fine spatiotemporal scale. Autonomous data collection with Unmanned Surface Vehicles (USV) creates new possibilities to sample aquatic high resolution over large areas by being cost efficient. However, the extent of spatial coverage and final sampling remain uncertain due novelty technology. Further, there is no established method for analysing fine-scale autocorrelated without aggregation, compromising...
From 1991 to 1996 we investigated how the breeding cycle of King Penguins Aptenodytes patagonicus, in a small colony at South Georgia, was affected by variation food availability between years. During first (1992) and third (1996) three successful cycles studied, plentiful, whereas lower during second (1994). We found (1) duration longer (455 days) 1994 compared 1992 (437 (438 days), (2) fewer birds made late attempts (38%) than (88%) (70%), (3) those that laid their egg later (mean 16...