Sökning: "Historical ecology"

Visar resultat 31 - 35 av 98 avhandlingar innehållade orden Historical ecology.

  1. 31. Zooplankton response to cyanotoxins

    Författare :Susanne Gustafsson; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; cyanotoxins; maternal effects; algal toxins; zooplankton; tolerance; cyanobacteria;

    Sammanfattning : Mass development of cyanobacteria (blue-green algae) is common in many lakes and coastal waters worldwide as a result of an increased nutrient loading. These blooms of cyanobacteria are undesirable for several reasons; thick mats of algae and unpleasant odour reduces the recreational values, bad taste reduces the quality of drinking water and the potent toxins produced by some species of cyanobacteria endanger human health. LÄS MER

  3. 32. SEA CHANGE : Social-ecological co-evolution in Baltic Sea fisheries

    Författare :Jonas Hentati-Sundberg; Henrik Österblom; Joakim Hjelm; Trevor Branch; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; resilience; social-ecological systems; complex adaptive systems; fisheries; Baltic Sea; Sustainability Science; vetenskap om hållbar utveckling;

    Sammanfattning : Sustainable management of natural resources requires an in-depth understanding of the interplay between social and ecological change. Linked social-ecological systems (SES) have been described as complex adaptive systems (CAS), which mean that they are irreducible, exhibit nonlinear dynamics, have interactions across scales and are uncertain and unpredictable. LÄS MER

  4. 33. Indirect effects of predation in human-modified landscapes

    Författare :Ellinor Sahlén; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Large carnivores affect prey species, with cascading effects on entire ecosystems. In anthropogenic regions large carnivores come into conflicts with humans, especially in rural areas where farming and hunting traditions are widespread. As a result, large carnivores have been eradicated from many regions across their historical distribution. LÄS MER

  5. 34. The hidden landscape : on fine-scale green structure and its role regulating ecosystem services in the urban environment

    Författare :Johanna Deak Sjöman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The thesis investigates and highlights the role of fine scale green structure in the urban landscape with regards to the regulating ecosystem services of runoff mitigation, wind speed regulation and modification to mean radiant temperatures. The analysis was based on case studies in southern Sweden, projecting from a flooding incident in the Höjeå river catchment in 2007 and the current seafront development of Lomma Harbour and similar schemes in the Öresund region. LÄS MER

  7. 35. Myrar på Storön vid Norrbottenskusten

    Författare :Jan Elveland; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Våtmarker; Sverige; Norrbotten; Växtsamhällen;

    Sammanfattning : ELVELAND, J. 1976. Coastal mires on the Storön peninsula, Norrbotten, N Sweden. Wahlenbergia 3. LÄS MER