Search for dissertations about: "Community structure"

Showing result 1 - 5 of 347 swedish dissertations containing the words Community structure.

  1. 1. Species interactions and community structure

    University dissertation from Peter Frodin, Department of Theoretical Ecology, Ecology Building, S-223 62 Lund, Sweden

    Author : Peter Frodin; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; spatial structure; local stability; enrichment; species interactions; Community structure; population dynamics;

    Abstract : In this theses I have focused on how the mechanisms of species interactions affect community structure. It is well known that certain species may have a particularly strong influence on the structure of a community. What is not fully understood is how to characterize these species that have such a strong impact on community structure. READ MORE

  2. 2. Distribution and Differences Stratification and the System of Reproduction in a Swedish Peasant Community 1620-1820

    University dissertation from Uppsala : Universitetsbiblioteket

    Author : Jonas Lindström; Maria Ågren; Jan Lindegren; Carl-Johan Gadd; [2008]
    Keywords : HUMANIORA; HUMANITIES; Peasant; stratification; inequality; reproduction; resources; distribution; social mobility; household; family; community; landholding; principles; conditions; social structure; feudalism; early modern period; Björskog; Sweden; agrarian history; social history; HUMANITIES and RELIGION History and philosophy subjects History subjects History; HUMANIORA och RELIGIONSVETENSKAP Historisk-filosofiska ämnen Historieämnen Historia;

    Abstract : This dissertation examines the character, conditions and change of peasant stratification in early modern Sweden. Wherever and whenever one looks, one finds that resources were unevenly spread among peasant households. In the literature, there are different, and conflicting, views compatible with this finding. READ MORE

  3. 3. Benthic diatoms in the Gulf of Bothnia Community analysis and diversity

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Svenja Busse; Michael Sullivan; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Baltic Sea; Biodiversity; Biomass; Community ecology; Diatoms; Multivariate analysis; Navicula; Phytobenthos; Salinity gradient; Scale; Size; Water movement; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi; Ecological Botany; Ekologisk botanik;

    Abstract : Benthic diatoms are valuable tools for biological monitoring and paleo-ecological reconstruction of past environmental conditions. This thesis aims at describing size-related properties of benthic diatoms and suggests that data assessment for community analysis can be improved by considering the importance of scale. READ MORE

  4. 4. Pollution-Induced Community Tolerance (PICT) of Bacteria: Evaluation in Phenol- and Antibiotic Polluted Soil

    University dissertation from Section of Biological and Earth Sciences

    Author : Louise Aldén; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Antibiotics; Bacteria; Community; Fungi; Leucine incorporation; Phenols; Soil; Pollution-Induced Community Tolerance PICT ;

    Abstract : The effects of organic pollutants on the soil microbial community were studied in this work. The main aim was to evaluate the use of pollution-induced community tolerance (PICT) in studying the effects of pollution. The leucine incorporation technique (indicating bacterial growth) was used to monitor changes in tolerance. READ MORE

  5. 5. Ectomycorrhizal community structure and function in relation to forest residue harvesting and wood ash applications

    University dissertation from Microbial Ecology, Lund University

    Author : Shahid Mahmood; [2000]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 14C allocation; P uptake; Calcium oxalate; Solubilisation; Tricalcium phosphate; Wood ash; Forest residue; N deposition; rDNA; ITS region; PCR-RFLP; Spruce; Ectomycorrhiza; Community structure; Wood ash colonisation; Spruce colonisation; Competition; Ecology; Ekologi;

    Abstract : Ectomycorrhizal fungi form symbiotic associations with tree roots and assist in nutrient-uptake and -cycling in forest ecosystems, thereby constituting a most significant part of the microbial community. The aims of the studies described in this thesis were to evaluate the potential of DNA-based molecular methods in below-ground ectomycorrhizal community studies and to investigate changes in ectomycorrhizal communities on spruce roots in sites with different N deposition, and in sites subjected to harvesting of forest residues or application of wood ash. READ MORE