A5039778537- Avian ecology and behavior
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Ecology and Vegetation Dynamics Studies
- Animal Ecology and Behavior Studies
- Animal Behavior and Reproduction
- Bird parasitology and diseases
- Plant and animal studies
- Rangeland and Wildlife Management
- Animal Vocal Communication and Behavior
- Ecology and biodiversity studies
- Climate variability and models
- Insurance, Mortality, Demography, Risk Management
- Agricultural pest management studies
- Insect and Pesticide Research
- Food Industry and Aquatic Biology
- Rabbits: Nutrition, Reproduction, Health
- Bat Biology and Ecology Studies
- Nutrition, Genetics, and Disease
- Wildlife-Road Interactions and Conservation
- Agriculture Sustainability and Environmental Impact
- Arctic and Antarctic ice dynamics
- Conservation, Ecology, Wildlife Education
- Environmental DNA in Biodiversity Studies
- Animal Behavior and Welfare Studies
Aarhus University
2016-2024
Hudson Institute
2019
John Wiley & Sons (United States)
2019
Evidence of declines in insect populations has recently received considerable scientific and societal attention. However, the lack long-term monitoring makes it difficult to assess whether are geographically widespread. By contrast, bird well monitored often used as indicators environmental change. We compared population trends European insectivorous birds with those other patterns were consistent insects. further examined evident for insectivores different habitats, foraging strata,...
Birds populations allied in abundance Changes climate can cause of species to decline, increase, or remain steady. Stephens et al. looked across common birds Europe and the United States. Despite many differences between two regions, expectations about how a might respond change did predict actual responses. Species predicted benefit from increasing temperatures, their associated effects, tended whereas those be negatively affected declined. Thus, even widely varying ecological conditions...
Abstract Aim Long‐term monitoring of biodiversity is necessary to identify population declines and develop conservation management. Because long‐term labour‐intensive, resources implement robust programmes are lacking in many countries. The increasing availability citizen science data online public databases can potentially fill gaps structured programmes, but only if trends estimated from unstructured match those programmes. We therefore aimed assess the correlation between data. Location...
Global climate change is driving species' distributions towards the poles and mountain tops during both non-breeding breeding seasons, leading to changes in composition of natural communities. However, degree season differences climate-driven community shifts has not been thoroughly investigated at large spatial scales. We compared rates winter (non-breeding season) summer (breeding) their relation temperature changes. Based on continental-scale data from Europe North America, we examined...
Summary The 2020 EU biodiversity strategy aims to halt the loss of and ecosystem services, but this requires effective monitoring determine whether these are achieved. Common bird continuously assesses changes in avian community, providing a powerful tool for temporal abundance distribution upper trophic level consumers. Two-thirds Denmark’s land area is intensively farmed, so agricultural habitats make major contribution Danish biodiversity. We looked amongst farmland birds Denmark during...
Capsule Long-distance migrant birds show less favourable trends than sedentary/short-distance species. Aims To use breeding bird surveys to contrast population amongst common species according their migration pattern. Methods Changes in abundance of 62 Danish sedentary, short-distance (Europe/North Africa) or long-distance (trans-Saharan) migrants were described by fitting log linear regression models point-count census data gathered during 1976–2005. Results Trans-Saharan declined 1.3% per...
Abstract Aim Changes in climate and land use practices have been found to affect animal populations different parts of the world. These studies typically conducted during breeding season, whereas non‐breeding season (hereafter ‘winter’) has received much less attention. regional winter abundances could be caused by changes overall population sizes and/or redistribution populations. We tested these mechanisms for terrestrial bird Northern Europe explored role change species habitat...
The effects of different environmental drivers on the changes in species' population abundances can be difficult to disentangle as they often act simultaneously. Researchers have built statistical models that include variables (such annual temperature) or species attributes a temperature preference), which are assumed detect impacts specific climate change). However, these approaches applied separately or, if combined, not explicitly compared. We show complementary insights gained by...
The Danish breeding Starling population declined at a mean annual rate of −2.24% ± 0.39 (95% CI) during 1976–2015 (a 60% decline overall). density in the mid-1990s was positively correlated with dairy cattle abundance 13 local areas. Regional declines between 2001 and 2014 were loss high intensity grazing pressure by cattle, as more animal husbandry moved indoors. long-term national long term numbers outdoors. This study therefore confirms that not only does extent available grassland to...
Harvest records are often assumed to offer an indirect measure of population abundance in huntable species. However, this requires density changes reflected comparable linear harvest rates. We tested assumption for common snipe Gallinago gallinago, wood pigeon Columba palumbus, coot Fulica atra, grey partridge Perdix perdix, roe deer Capreolus capreolus and brown hare Lepus europaeus Denmark. If we consider hunting a form predator—prey interaction, the annual kill can be viewed as predator...
The abundant and widespread Common Starling (Sturnus vulgaris) is currently declining across much of Europe due to landscape changes caused by agricultural intensification. proximate mechanisms causing adverse effects breeding Starlings are unclear, hampering our ability implement cost-efficient agri-environmental schemes restore populations former levels. This study aimed show how this central foraging farmland bird uses selects land cover types in general use habitat relation distance from...
We combined data from two independent Danish citizen science time‐series to describe changes in (1) abundance and (2) distribution of 12 wintering populations geese swans tested the hypothesis that increases national since 2003 correlated with an expansion into formerly unoccupied winter farmland habitat. Five showed significant abundance, declined remainder no trend over same period; nine (including five nationally increasing declining) significantly positive correlations between annual...
Long-distance migrants are particularly recognized for the distances covered on migration, yet little is known about they cover during rest of year. GPS-tracks 29 Montagu's harriers from breeding areas in France, The Netherlands and Denmark showed that fly between 35 653 88 049 km yr −1 , which average only 28.5% migration. Mean daily migration were 296 d autumn 252 spring. Surprisingly, males' (217 ) close to those whereas females moved significantly less (101 than males. In terms flight...
The greatest loss of biodiversity in the EU has occurred on agricultural land. Common Starling (Sturnus vulgaris) is one many numerous and widespread European farmland breeding bird species showing major population declines linked to intensification. Here we present results based monitoring data collected since 1975 24 countries examine influence changing extent grassland cattle abundance (based earlier studies importance lowland grazed for species), wintering provenance temperature national...
The population of barnacle geese wintering in Denmark has shown a steep increase during the last decades, prompting parallel escalation agricultural conflicts. In Denmark, economic compensation to farmers suffering goose damage crops is not practiced, but despite that fully protected, landowners can obtain permit undertake so-called derogation shooting (lethal scaring) reduce local where other means scaring have been insufficient. Here, we describe development numbers and efforts period...
Extensive ringing data from Falsterbo, South Sweden, were used to analyse numbers, migration patterns and recoveries in the Blue Tit Pants caeruleus during 15 years (1980–94). The totals as well counts at Falsterbo showed an overall increase of Tits this period. This corresponded with trends other monitoring projects Sweden number annually ringed nestlings. Analyses daily seasonal age sex composition carried out. majority migrating females, but increasing proportion males numbers Tits....
Summary As a result of increasingly intensified agricultural practices in Europe over the last century, agroecosystems have experienced severe biodiversity declines. Among species experiencing negative population trajectories habitats are meadow and farmland birds, which suffered loss both habitat food availability cultivated fields. In Denmark, biotope plans (a requirement to establish small agro-environmental on properties with stocking game birds) been implemented as measure mitigate...
The exponential increase in the ‘NW/SW European Greylag Goose population’ (NGGP) has created demands for more precise estimates of national breeding populations and improved understanding their movements to support its effective management. Increased NGGP abundance been associated with a northeast-ward shift wintering centre gravity, suggesting major changes migratory patterns. Greater numbers Geese Denmark could originate from increases Danish population showing sedentary habit and/or...
Abstract Rooks Corvus frugilegus are common and widespread in urban agricultural habitats Denmark. Large numbers killed annually by derogation shooting to control population growth reduce noise near populated areas prevent damage. Responding increasing public complaints about nuisance from rookeries, we investigated changes extent of within 500 m, 1000 m 2000 all known breeding rook colonies (rookeries) eastern Jutland, Denmark 1991 compared 2021 based on open access land cover GIS layers...
Abstract Most European goose populations have increased exponentially, and this has increasingly brought them into conflict with human activities. To manage conflict, we used multi-criteria decision analysis to help set population targets for a super-abundant of greylag geese ( Anser anser ). We relied on expert elicitation assess the consequences varying abundance nine ecological, economic, societal objectives. Representatives from national governments non-governmental organizations then...