Sökning: "Ecosystem processes"

Visar resultat 1 - 5 av 267 avhandlingar innehållade orden Ecosystem processes.

1. 1. Ecosystem processes and biodiversity : theoretical studies and experiments with an aquatic model ecosystem

   Författare :Jon Norberg; Michael L Pace; Stockholms universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Systems Ecology; systemekologi;

   Sammanfattning : Today, human enterprise has implications for all of nature, from the well being of the smallest organism, to the alteration of global biogeochemical cycles. To understand how major ecosystem processes are affected by environmental changes and decreasing biodiversity is crucial as many of natures services depend of such processes. LÄS MER

3. 2. The importance of biodiversity for ecosystem processes in sediments : experimental examples from the Baltic Sea

   Författare :Johan Näslund; Jonas Gunnarsson; Sara Sjöling; Nils Kautsky; Antoine Grémare; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biodiversity; Soft-bottom sediment; Ecosystem processes; Ecosystem function; Benthic-pelagic coupling; Baltic Sea; Trophic interactions; Pollutant biodegradation; Organic matter mineralization; Deposit feeder; Detritivore; Invasive species; Marine ecology; Marin ekologi; marin ekotoxikologi; Marine Ecotoxicology;

   Sammanfattning : Aquatic sediments are, by surface, the largest habitat on Earth. A wide diversity of organisms inhabit these sediments and by their actions they have a large influence on and also mediate many ecosystem processes. LÄS MER

4. 3. Fish for Food and Ecosystem Function : Fisheries, Trade and Key Ecosystem Processes in Coral Reefs

   Författare :Matilda Thyresson; Magnus Nyström; Edward H. Allison; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fish; food; key ecosystem processes; functional groups; coral reefs; trade; gear; small-scale fisheries; social-ecological systems; Zanzibar; Tanzania; Western Indian Ocean; naturresurshushållning; Natural Resources Management;

   Sammanfattning : Fish is a key source of food and income to millions of people living along tropical coastlines. They also play essential roles underpinning key ecosystem processes in coral reefs. For example, herbivorous fish keep algae in check that otherwise may outcompete corals, reducing the reef’s social-ecological values. LÄS MER

5. 4. Från ett perspektiv på ekologiska processer till ett verktyg för att diskutera hållbarhetsfrågor : Hur ekosystemtjänster – ett nytt ämnesinnehåll, kan ta form i undervisningspraktiken

   Författare :Andreas Magnusson; Ulla Runesson Kempe; Jönköping University; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ecosystem services; ecosystem; sustainable development; education for sustainable development; learning study; variation theory; activity theory; the cycle of expansive learning; middle school;

   Sammanfattning : The aim of this study was to generate knowledge about how teachers embark on new subject content and how their understandings of ecosystem services evolve and change in teaching practice, and also what it means to be able to discuss the relationship between the ecological and social in terms of ecosystem services in a teaching practice in middle school.The teachers used the learning study model and variation theory to explore the object of learning, by trying to design an instruction that offers fifth grade students the possibility to develop their knowledge of ecosystem services. LÄS MER

7. 5. Learning ecosystem complexity : A study on small-scale fishers’ ecological knowledge generation

   Författare :Diana Garavito-Bermúdez; Camilla Thunborg; Cecilia Lundholm; Beatrice Crona; Alan Reid; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; small-scale fishers; informal learning; knowledge generation; systems thinking; ecological knowledge; ecosystem complexity; work practices; emotional bonds to place; sustainable fisheries management; environmental learning; Vättern; Blekinge; Baltic Sea.; pedagogik; Education;

   Sammanfattning : Small-scale fisheries are learning contexts of importance for generating, transferring, and updating ecological knowledge of natural environments through everyday work practices. The rich knowledge fishers have of local ecosystems is the result of the intimate relationship fishing communities have had with their natural environments across generations (see e. LÄS MER