Thomas Grünkorn

Thomas Grünkorn
Bio Consult SH

About

26
Publications
7,720
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216
Citations
Citations since 2016
14 Research Items
147 Citations
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20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025

Publications

Publications (26)
Article
Full-text available
Wildlife exposures to pest controlling substances have resulted in population declines of many predatory species during the past decades. Many pesticides were subsequently classified as persistent, bioaccumulative, and toxic (PBT) and banned on national or global scales. However, despite their risks for non-target vertebrate wildlife, PBT substance...
Article
Full-text available
Ziesemer, F., M. Schlüter & T. Grünkorn 2021. Video-Beobachtungen an Horsten des Wespenbussards Pernis apivorus in Schleswig-Holstein. Corax 24: 369-380. We analyzed data from two nests, each with two nest- lings aged about three weeks until after fledging. Videos (with audio at one nest) and some photos were taken by day and by night, with some g...
Article
Full-text available
roughly two-thirds of humanity are expected to live in urban areas. As cities expand, humans irreversibly transform natural ecosystems, creating both opportunities and challenges © 2020 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits u...
Chapter
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Aim of this part of the study was to investigate the flight behaviour of white-tailed sea eagles in the vicinity of existing wind farms by means of visual observations to determine especially the collision risk. Attempts were made to observe adult birds flying near wind turbines and to determine flight paths. Despite long watching series no substan...
Chapter
Full-text available
The increase of wind power plants as a German strategy to develop green, renewable energy in order to overcome energy produced by nuclear power and fossil energy sources leads to a substantial collision risk for the white-tailed sea eagle. The aim of our study was to understand how frequently and under which circumstances eagles approach wind turbi...
Chapter
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By means of case studies, nature and extent of the effects of individuals lost due to wind turbines on establishment and survival of breeding territories and the breeding success of the white-tailed sea eagle are presented. By identifying individual colour rings and collection of moulted feathers, the individual breeding birds and the breeding succ...
Chapter
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In this chapter, distance from breeding site, spatial distribution of birds found dead and location of foraging waters of white-tailed sea eagles is put into context with existing wind turbines in Schleswig-Holstein in northern Germany. A general spatial separation of breeding sites of the white-tailed sea eagle and currently installed wind turbine...
Chapter
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Aim of the project was to investigate to what extent white-tailed sea eagles fly near wind turbines, to estimate the collision risks and to make proposals on how to reduce collisions.
Chapter
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This chapter summarizes the main results of the study and recommends measures to avoid collisions of birds of prey at wind turbines.
Chapter
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Collisions of birds with wind turbines are a focal point when discussing the implications of renewable energies on nature conservation. The project “Prognosis and assessment of collision risks of birds at wind turbines in northern Germany” (PROGRESS) focused on the extent and consequences of bird mortality at wind turbines. Collision victims were s...
Article
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Nocturnally migrating birds, particularly passerines, are known to be vulnerable to collision with manmade structures such as buildings, towers or offshore platforms, yet information with respect to wind farms is ambiguous. We recorded bird flight intensities using radar during autumn migration at four wind farms situated within a major migration f...
Technical Report
Full-text available
Kollisionen von Vögeln (und Fledermäusen) sind ein zentrales Konfliktfeld zwischen dem Ausbau der Windenergienutzung und dem Naturschutz. Obwohl mittlerweile eine hohe Anzahl von Studien zu diesem Bereich vorliegt, gibt es nur sehr wenige systematische Untersuchungen, in denen Kollisionsraten von Vögeln quantifiziert wurden. Dies erschwert die Bewe...
Article
Full-text available
Parents may adapt their offspring sex ratio in response to their own phenotype and environmental conditions. The most significant causes for adaptive sex-ratio variation might express themselves as different distributions of fitness components between sexes along a given variable. Several causes for differential sex allocation in raptors with rever...
Article
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Common Scoter (Melanitta nigra) at the Schleswig-Holstein North Sea coast The Schleswig-Holstein North Sea coast has internatio- nal importance for Common Scoters as a wintering and moulting area. The Agency for Mining, Energy and Geo- logy (Landesamt für Bergbau, Energie und Geologie (LBEG)) gave the permission to extract sea sand to the west of...
Article
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Density-dependent reproduction is commonly explained by either the habitat heterogeneity (HHH) or individual adjustment (IAH) hypothesis. Under the HHH, high quality territories are assumed to be occupied first. At higher density, occupation of low-quality territories increases due to lower availability of high-quality territories, which reduces me...
Article
Full-text available
1. The habitat heterogeneity (HHH) and individual adjustment (IAH) hypotheses are commonly proposed to explain a decrease in reproduction rate with increasing population density. Higher numbers of low-quality territories with low reproductive success as density increases lead to a decrease in reproduction under the HHH, while more competition at hi...
Article
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Linking age-specific vital rates to population growth through demographic matrix models can enhance our understanding of crucial population processes, vital in a conservation context. The white-tailed eagle (Haliaeetus albicilla) population in the Federal State of Schleswig-Holstein, Germany, has been monitored since re-colonisation in 1947 and pro...
Article
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Many bird species adjust their offspring sex ratio as a response to environmental conditions or sexual dimorphism in size and dispersal. Offspring sex ratios may therefore vary among populations depending on the different demographic and ecological trajectories. We sampled Common Raven Corvus corax nestlings close to the fledging stage from three C...
Conference Paper
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This study investigates the effects of an operating offshore wind farm on the temporal and spatial pattern of harbour porpoise acoustic activi ty at a fine scale. The project was conducted jointly by the University of Hamburg and BioConsult SH in the two Danish offshore wind farms Horns Rev (North Sea) and Nysted (Baltic Sea) and financed by th...
Article
Full-text available
Struwe-Juhl, B. & T. Grünkorn 2007: Results of colour-ringing White-tailed Sea Eagles Haliaeetus albicilla in Schleswig-Holstein: site fidelity, movements, dispersal, age of first breeding, age structure and breeding of siblings. Vogelwelt 128: 117 – 129. Between 1977 and 2006, 328 White-tailed Sea Eagle nestlings were ringed in Schleswig-Holstein...
Article
The study investigated breeding stock and breeding success of the Common buzzard (Buteo buteo) from 2002 to 2004 in an area of 90 km2 west of Schleswig (Schleswig-Holstein, Germany) with a high density of wind power plants. Abundance increased in areas with a higher amount of grassland. The study revealed nor correlation between number of eggs or n...

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