Sökning: "population continuity"

Visar resultat 1 - 5 av 53 avhandlingar innehållade orden population continuity.

1. 1. Divergence, admixture and continuity in the human past : Demographic inference using ancient and modern genomes

   Författare :James McKenna; Mattias Jakobsson; Per Sjödin; Ida Moltke; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Human evolution; population genetics; ancient genomes; population continuity; divergence; Biology with Specialisation in Human Evolution and Genetics; Biologi med inriktning mot människans evolution och genetik;

   Sammanfattning : Demographic forces shaping the genetic variation we observe today can include population divergences, admixture events and continuity through time. The advancement of high-throughput sequencing technologies, together with developments in molecular and bio-informatics methods, mean the number of ancient genomes available for inference has risen steeply. LÄS MER

3. 2. Ecology and conservation of the moth Dysauxes ancilla

   Författare :Per-Eric Betzholtz; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; Djurekologi; marc-recapture; population viability; fluctuating asymmetry; genetic status; larval feeding; movements; endangered species; conservation; outpost population; Lepidoptera; Dysauxes ancilla;

   Sammanfattning : The ecology of the moth Dysauxes ancilla was studied in the only Swedish breeding area at Beijershamn, situated on the Baltic island of Öland. The population is a northern outpost, separated from the species´ continous distribution area in middle- and southeast Europe. LÄS MER

4. 3. Plant species diversity in semi-natural grasslands. Effects of scale, landscape structure and habitat history

   Författare :Triin Reitalu; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; habitat fragmentation; landscape diversity; habitat connectivity; historical maps; continuity; land-use history;

   Sammanfattning : The thesis examines the impact of present and past landscape structure, habitat history and management on different aspects of present-day plant species diversity in fragmented semi-natural grasslands in Sweden and in Estonia. Species diversity was significantly associated with present and/or past grassland connectivity in the majority of the studies in the thesis. LÄS MER

5. 4. Sockenbankirerna : Vånga socken i Skåne 1840-1900

   Författare :Anders Perlinge; Mats Hellspong; Johan Söderberg; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; institutional economic theory; transaction costs; claims; incurring of debts; interpersonal relationships; rituals; relational power; counter power; categorical inequality; continuity; discontinuity; probate inventories; cultural history; mortality; poverty; savings bank; insider loans; local credit market; finance patterns; social activity fields; lending policy; borrowing strategies; promissory notes; debts; Ethnology; Etnologi;

   Sammanfattning : Theories on human behaviour and transaction costs contribute to our present understanding of why new institutions, such as banks, were established. Private promissory notes had long been circulated as local instruments of credit, and to a much greater degree than the new banknotes. LÄS MER

7. 5. Den rotfaste bonden - myt eller verklighet? Brukaransvar i Ramkvilla socken 1620-1820

   Författare :Magnus Perlestam; Historia; []
   Nyckelord :HUMANIORA; HUMANITIES; Modern historia ca. 1800-1914 ; Contemporary history circa 1800 to 1914 ; Tidig modern historia till ca. 1800 ; farmer; Modern history up to circa 1800 ; Sweden; Småland; Ramkvilla parish; gender; Age of Greatness; eighteenth century; inheritance practices; traditional peasant society; inter-generational relationships; myth creation; familial continuity; migration.; population registers; bönder; History subjects;

   Sammanfattning : For how many years was a farmer responsible for running a farm in Sweden’s old peasant society’? This is the question that underpins my research into life in Ramkvilla parish in the province of Småland for two hundred years (1623–1819). By conducting a detailed study of farm practice at the individual level, I have been able to analyse a complex theme that touches upon the issues of responsibility for work and taxes, relationships between the generations and sexes, and the crises of agrarian society. LÄS MER