Search for dissertations about: "ecosystem complexity"

Showing result 1 - 5 of 64 swedish dissertations containing the words ecosystem complexity.

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

   Author : Diana Garavito-Bermúdez; Camilla Thunborg; Cecilia Lundholm; Beatrice Crona; Alan Reid; Stockholms universitet; []
   Keywords : 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;

   Abstract : 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. READ MORE

4. 2. Extinctions and Ecosystem Stability

   Author : Susanne Pettersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; structural stability; ecosystems; interaction structure; Generalised Lotka-Volterra; complexity; local stability; dynamical systems; stability;

   Abstract : Human society's expansion and demand for both biotic and abiotic natural resources exert a large pressure on ecosystems around the globe. Ecosystems are complex networks of species interacting with each other and their physical surroundings. READ MORE

5. 3. How on Earth : Operationalizing the ecosystem service concept for local sustainability

   Author : Katja Malmborg; Lisen Schultz; Albert Norström; Elin Enfors-Kautsky; Erik Gomez-Baggethun; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecosystem service bundles; System dynamics; Participatory methods; Usable knowledge; Leverage points; Learning; Complexity; Sustainability Science; vetenskap om hållbar utveckling;

   Abstract : Ecosystem services are co-produced in social-ecological systems. Due to their social-ecological framing, ecosystem services hold the potential to be a concept around which different stakeholders with vested interests in different aspects of landscape management can meet. READ MORE

6. 4. Ecosystem functioning in streams : Disentangling the roles of biodiversity, stoichiometry, and anthropogenic drivers

   Author : André Frainer; Roland Jansson; Brendan McKie; Jonathan Benstead; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; detrital food web; functional diversity; stoichiometry; nitrogen and phosphorus concentrations; recalcitrant carbon; spatial and temporal species distribution; pools and riffles; isotopes; leaf decomposition rates; land use; restoration; habitat complexity;

   Abstract : What will happen to ecosystems if species continue to go extinct at the high rates seen today? Although ecosystems are often threatened by a myriad of physical or chemical stressors, recent evidence has suggested that the loss of species may have impacts on the functions and services of ecosystems that equal or exceed other major environmental disturbances. The underlying causes that link species diversity to ecosystem functioning include species niche complementarity, facilitative interactions, or selection effects, which cause process rates to be enhanced in more diverse communities. READ MORE

7. 5. Complexity and Change in a Simple Food Web : Studies in the Baltic Sea (FAO Area 27.IIId)

   Author : Henrik Österblom; Sture Hansson; Robert W Furness; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Avian cholera; Bottom-up; Bycatch; Clupea harengus; Ecosystem; Food web; Gadus morhua; Halichoerus grypus; Regime shift; Sprattus sprattus; Top-down; Trophic cascade; Uria aalge; Marine ecology; Marin ekologi;

   Abstract : An influence at one trophic level can result in dynamic impacts also on other components of a food web. These dynamics are known as trophic cascades, and can be both top-down and bottom-up. After a near-collapse of the Baltic cod Gadus morhua stock in the 1980s, its main prey sprat Sprattus sprattus increased dramatically. READ MORE