Many different species rely on secondary sexual traits to communicate fitness and individual value to potential mates. Songbirds are known to use many different secondary sexual traits, including visual displays, plumage coloration, and song; for territorial defense, mate attraction/assessment, and pair interactions. Song is thought to reflect key traits of singers including the species and popula

In the European human-dominated landscapes, large carnivores have recently experienced a return to many areas where they were previously extirpated. The degree of this recovery however varies importantly throughout the continent, and the factors causing this difference remain largely undocumented. I attempted to shed light on this pattern of recovery by developing models of the distribution of the

Tawny owls and food for thought I have been focusing on tawny owls, which are a species of owls that you can find in a wide range of habitats. Everywhere from open fields to cities, they have found a way to survive, hunt for food and settle down. A very adaptable species. I was interested in finding out just what do these birds of prey eat, and how does that affect how well they survive, in diffe

Den svartmunnade smörbulten – Här för att stanna? Jorden är en plats vi tillsammans delar vår levnadstid på och kallar vår planet. Den är stor och indelad i flera olika kontinenter där stora bergsmassiv och hav fungerar som barriärer. Dessa barriärer delar inte bara in oss människor på geografiskt olika platser, utan även andra levande organismer som har levt med dessa gränser sedan det blev beb

How dams affect invertebrates Getting your electricity from naturally produced energy sounds good, but this has its consequences too. To produce electricity from water, dams must be constructed, and these form a barrier between upstream and downstream areas. This stops our migrating species such as salmons, trout's, and eels and a decline in these economically valuable fish. Not only do salmo

Plastic pollution is a severe global problem and every year approximately 368 million tons of plastic is produced. Both terrestrial and marine environments are impacted and hundreds of species affected. Marine plastic debris accounts for a weight of 268 940 tons and affects hundreds of marine species through habitat degradation, entanglement and ingestion. Microplastics (MPs) are a type of plastic

Titel: Att leda och leda sig själv på distans - En kvalitativ studie om chefers utmaningar i ledarskapet och hur dessa bemöts under Covid-19 Författare: Elin Thomsen och Nathalie Bengtsson Handledare: Malin Andersson Nivå och kurs: Kandidatuppsats vid Institutionen för Service Management, Lunds Universitet, Campus Helsingborg, KSMK65 Service Management: Examensarbete för kandidatexamen, VT 2021, 1

Metodutveckling i sökandet efter mikroplaster i tarminnehåll från tumlare Ett allt växande problem är ökande mängden mikroplaster i havet och hur de påverkar havslevande organismer. Mikroplast är små plastbitar som är mellan 0,1 - 500 mikrometer. De är uppdelade i primära och sekundära mikroplaster. Det har visat sig att båda typerna ackumuleras och stannar kvar i vattenlevande ekosystem där plasAn ever-growing problem is the increasing amount of microplastics in the sea and how they affect marine organisms. Microplastics are small pieces of plastic that are between 0.1 - 500 micrometres. They are divided into primary and secondary microplastics. Primary microplastics are those plastics that are intentionally produced to be microplastics. Secondary microplastics are generated from larger

På offensiven mot invasiva parksliden - Kill it with heat! Invasiva främmande arter är ett växande problem världen över. De konkurrerar ut de växter som redan finns. Det leder till att även andra djur och organismer drabbas, vilket har en övergripande negativ inverkan på den biologiska mångfalden. De påverkar även många ekosystemtjänster och den årliga kostnaden bara i Sverige har beräknats till

Jobba med, inte mot, naturen: Hur väl hjälper vanligt förekommande naturliga element oss mot översvämningar? Den enskilt viktigaste parametern för översvämningshantering för korta regn är ett naturligt elements (t.ex dammar, regnträdgårdar) lagringsförmåga. Av de åtta studerade elementen så var vanliga dammar de mest effektiva, men samtliga hade en viss effekt. Idag är översvämningar den enskilClimate change alterations in precipitation patterns, coupled with rapid urbanization are posing a great challenge for city planners and storm water engineers alike. The traditional approach for flood mitigation, with ever-larger pipes and barriers, are slowly being replaced by the implementation of natural elements, also called blue-green elements, in the urban environment. This thesis aimed to c

Fishing for interaction partners Bacteria, the most abundant living organisms, come in many shapes and sizes depending on how they grow and divide. Some bacteria like Escherichia coli form rodlike structures and divide in the middle. Others, like Streptomyces venezuelae, grow as long and branching filamentous cells called hyphae. They build their cell walls at the tips of these hyphae. Two protei

Mysteriet på genen i den vita kornplantan Domesticeringen av sädesslaget korn (Hordeum Vulgare.L) kan spåras 10 000 år tillbaka i tiden. Förutom att ge oss djurfoder, mjöl, öl, whiskey och annat gott har korn länge använts som en modellorganism för analyser inom växtgenetik för att det finns en stor samling korn-mutationer tillgängligt för forskare. Kartläggningen av växtens gener har pågått seda

Distinguishing between people's voices is something the human brain does naturally, using only frequencies picked up by the inner ear. The field of speaker recognition is concerned with making machines do the same thing using digitally sampled speech and data processing. The processing extracts relevant information about the speech from the high dimensional acoustic data which can help the mac

Non-native trees are common in urban environments all over the world. From a conservation viewpoint, it is essential to understand how these trees are affecting urban breeding birds. Non-native trees house fewer and smaller invertebrates than native trees do and are considered a poor food source for insectivorous birds. Still, studies are lacking on exactly how non-native trees affect birds’ feedi

SYFTE Undersöka hur A-huset fungerar som arkitektskola. MÅL Frigöra arkitektskolan från A-husets våld. INNEHÅLL Arbetet bygger på: • Intervjuer med studenter, alumner, lärare, bibliotekarie, verkstadsinstruktör, arkitekter, fastighetsutvecklare. • Studieresor till uma, kth samt Chalmers och samtal med personal och studenter från dessa skolor. • Arkivstudier, sökande i ArkDes-arkiv, Universite

Neurogenesis, the formation of new neurons from neural stem cells, persists throughout life but with a rapid reduction during aging. With such a reduction, decline in cognitive abilities and the occurrence of neurodegenerative diseases are imminent. It is, therefore, important to better understand the role of key factors involved in the reduction of neurogenesis during aging. Microglia, the brain-

Cost efficiency is important in the society and more or less relevant in most building projects. When designing fire safety in a building, cost/benefit analyzes can form a basis for decision-making, in order to provide proposals for the most cost-effective solution for the object. In this report a model for calculating cost/benefit is developed. The proposed model is an Excel-tool that can be used