A5018037145- Avian ecology and behavior
- Animal Behavior and Reproduction
- Ecology and Vegetation Dynamics Studies
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Animal Ecology and Behavior Studies
- Plant and animal studies
- Ecology, Conservation, and Geographical Studies
- Environmental Conservation and Management
- Bird parasitology and diseases
- Fish Ecology and Management Studies
- Rangeland and Wildlife Management
- Marine and coastal plant biology
- Genetic diversity and population structure
- Wind Energy Research and Development
- Species Distribution and Climate Change
- Hemispheric Asymmetry in Neuroscience
- Construction Project Management and Performance
- Physiological and biochemical adaptations
- Arctic and Antarctic ice dynamics
- Environmental Philosophy and Ethics
- International Human Rights and Reproductive Law
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Environmental Science and Technology
Nature And Biodiversity Conservation Union
2004-2017
Kiel University
1989-2000
Comparative analyses of avian population fluctuations have shown large interspecific differences in variability that been difficult to relate variation general ecological characteristics. Here we show demographic stochasticity, caused by random among individuals their fitness contributions, can be predicted from a knowledge the species' position along "slow‐fast" gradient life‐history variation, ranging high reproductive species with short life expectancy at one end often produce single...
Abstract Gene flow promotes genetic homogeneity of species in time and space. can be modulated by sex‐biased dispersal that links population genetics to mating systems. We investigated the phylogeography widely distributed K entish plover C haradrius alexandrinus . This small shorebird has a large breeding range spanning from W estern E urope J apan exhibits an unusually flexible system with high female dispersal. analysed structure gene using 427‐bp fragment mitochondrial (mt DNA ) control...
Fitness can be profoundly influenced by the age at first reproduction (AFR), but to date AFR-fitness relationship only has been investigated intraspecifically. Here, we between AFR and average lifetime reproductive success (LRS) across 34 bird species. We assessed differences in deviation of Optimal (i.e., species-specific associated with highest LRS) from sexual maturity, considering potential effects life history as well social ecological factors. Most individuals adopted both mean species...
Abstract Despite the protective measures that have been implemented to increase productivity of meadow birds, populations are still declining in most breeding and wintering areas. We therefore do not know how large efforts need be curb decline bird populations. By taking advantage monitoring data from lapwings Netherlands (NL) one region Germany [Schleswig‐Holstein (SH)], we investigated demographic drivers responsible for evaluated impact measures. In these populations, some nests marked...
Due to the ‘double‐clutch’ mating system found in arctic‐breeding Little Stint Calidris minuta , each parent cares for a clutch and brood alone. The resulting constraint on feeding time, combined with cold climate small body size, may cause energetic bottlenecks. Based notion that mass stores birds serve as an ‘insurance’ transient periods of negative energy balance, but entail certain costs well, vary relation climatic conditions stage breeding cycle. We studied Stints geographical...
In many colonial bird species there is considerable intraspecific variation in colony size and inter‐nest distance (colony density). Possible causes of this its effects on hatching success (survival eggs) breeding (probability a pair raising chicks) were studied 48 Avocet Recurvirostra avosetta colonies Schleswig‐Holstein (Germany) between 1991 1996. Colony density was influenced by time year habitat (categories: island or mainland, close to far from feeding grounds). Colonies islands had...
Abstract We investigated breeding success of Avocets Recurvirostra avosetta on the Wadden Sea coast Schleswig-Holstein, Germany, during years 1988–1997. Annual variations in hatching were mainly determined by presence Red Foxes Vulpes vulpes an embanked part study site and occurrence storm tides saltmarshes. Hatching did not correlate with population size avian egg predators. chick survival rates positively associated June temperatures. The influence predators was detectable. (number...
Abstract Growth of mass and linear body dimensions (bill, tarsus wing length) was studied in the Little Stint Calidris minuta at several locations on Taimyr Peninsula, Siberia (73°–76°N) 1983–94. Stints fledged near-adult mass, 15 days age. followed an S-shaped pattern which best described mathematically by a logistic curve. Curves this type showed that growth similar between study sites years, although there were differences development during first after hatching, perhaps related to...
-In intertidal habitats, Dunlins (Calidris alpina), like other shorebirds, spend most of the time around high tide roosting on ground. Occasionally, however, remain airborne at and fly over sea rather than sitting in saltmarshes. Here I describe over-sea flocking German Wadden Sea coast try to analyze factors associated with this behavior. Over-sea occurred only one site, Jadebusen, where it was recorded 5 out 35 occasions. absence safe (poorly or non-vegetated) sites, presence tall trees...
Evidence for the occurrence of conspecific nest parasitism (CNP) in Pied Avocets Recurvirostra avosetta is presented. Clutches more than four eggs had obviously been produced by one female but were incubated only pair each. Minimum estimates frequencies parasitized clutches and parasitic 3.3% 1.3% respectively. CNP increased frequency colonies with higher densities. The was unaffected rate failures early season. On average, laid earlier season majority non‐parasitic eggs. Parasitic usually...
-Egg size variation in the Pied Avocet Recurvirostra avosetta was studied at seven breeding colonies on North Sea coast of Schleswig-Holstein Germany 1999. A total 999 eggs from 283 clutches were measured during whole period. Egg very variable and most variance due to differences between clutches. Eggs within a clutch relatively uniform size. Size laying order could not be detected. did differ four-egg three-egg size, length incubation period decreased as season progressed. chick hatching...
Abstract Experimental studies have shown that individual wildfowl can shorten or skip moulting if the time between breeding and wintering is short; however, in wild birds are scarce. We tracked nine Common Shelducks Tadorna tadorna during seasons determined flightless based on typical movement patterns. found different patterns for two late-breeding females, suggesting they skipped shortened moult of their flight feathers. These results provide a link previous experimental situation birds,...