Sökning: "competition communities"

Visar resultat 1 - 5 av 74 avhandlingar innehållade orden competition communities.

1. 1. Evolving ecological communities in changing environments

   Författare :Jacob Johansson; Evolutionär ekologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adaptive dynamics; competition; community evolution; ecological communities; environmental change; evolutionary branching;

   Sammanfattning : This thesis consists of theoretical studies of the evolutionary consequences of environmental change in ecological communities. Paper I and II are concerned with the origin of diversity, i.e. how a single lineage can split into two, under the influence of selection induced by competitive interactions (evolutionary branching). LÄS MER

3. 2. Functional and structural characterizations of phytoplankton-bacteria interactions in response to environmental challenges

   Författare :Eva Sörenson; Catherine Legrand; Elin Lindehoff; Jarone Pinhassi; Sonya Dyhrman; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Interactions; phytoplankton; microalgae; bacteria; communities; aquatic; diversity; functions; structure; species-specific; microbiome; core microbiome; response diversity; resilience; resource partitioning; competition; coexistence; amplicon sequencing; metatranscriptome; Akvatisk ekologi; Aquatic Ecology; Mikrobiologi; Microbiology;

   Sammanfattning : Microorganisms, such as phytoplankton and bacteria, make up ≈70% of aquatic biomass and contribute 50-85% of the oxygen in Earth’s atmosphere. The microbial loop concept and the discovery of the large diversity in microbial communities acknowledge that biotic interactions between microorganisms in addition to resource competition enable the recycling of energy and nutrients in aquatic food webs. LÄS MER

4. 3. Interaction strength and responses of ecological communities to disturbances

   Författare :Maria Christianou; Bo Ebenman; Peter de Ruiter; Linköpings universitet; []
   Nyckelord :Species deletion; secondary extinctions; keystone species; keystone links; species reintroductions; Lotka-Volterra models; local stability; permanence; resilience; sensitivity analysis; diversity; complexity; food webs; competition communities; NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : Ecological communities are continuously exposed to natural or anthropogenic disturbances of varied intensity and frequency. The way communities respond to disturbances can depend on various factors, such as number of species, structural characteristics of the community, stability properties, species characteristics and the nature of the disturbance. LÄS MER

5. 4. Structuring factors for macroinvertebrate communities and the importance for ecosystem processing

   Författare :Pia Hertonsson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ephemeroptera; competition; Predation risk; brownification; invasive sp.; decomposition; grazing; growth; gastropoda; mortality; amphipoda; isopoda;

   Sammanfattning : Aquatic macroinvertebrates play important roles in our ecosystems and are essential for the ecosystem processing. An improved knowledge of structuring factors, such as competition and predation, and the way in which they operates in the macroinvertebrate community is crucial for our understanding of not only the macroinvertebrates but also the ecosystem in general. LÄS MER

7. 5. Behind the scenes of land grabbing : conflict, competition, and the gendered implications for local food production and rural livelihoods in Cameroon

   Författare :Frankline Ndi; Simon Batterbury; Australia Victoria University of Melbourne; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Land grabbing; conflict; competition; access to land; gender; food production; rural livelihoods; political ecology; Cameroon;

   Sammanfattning : Large-scale land acquisitions or land grabbing are widespread – cutting across almost all parts of the developing world – Asia, Latin America and Africa. In recent years, this phenomenon has grown at unprecedented rates with Africa being the most targeted continent. LÄS MER