Sökning: "subarctic ecology"

Hittade 5 uppsatser innehållade orden subarctic ecology.

1. 1. Trends in mountain birch seed abundance and its relation to temperature and moth abundance: a ten-year study from Swedish Lapland

   Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

   Författare :Frida Gustafsson; [2023-02-09]
   Nyckelord :Betula pubescens; climate change; seed production; Epirrita autumnata; Operophtera brumata; subarctic ecology; folivory; larval abundance;

   Sammanfattning : Boreal forest is the world’s largest terrestrial biome. Being one of the most ubiquitous and coldtolerant tree species in Sweden, the mountain birch forms a unique deciduous treeline and marks the forest-tundra ecotone. LÄS MER

3. 2. Plant community responses to 15 years of nitrogen and phosphorus fertilization along an elevational gradient in the subarctic tundra

   Master-uppsats, SLU/Dept. of Forest Ecology and Management

   Författare :Gaya Ten Kate; [2023]
   Nyckelord :arctic tundra; climate change; fertilization; nitrogen; phosphorus; plant community composition; species richness; Simpson’s diversity; Shannon-Wiener diversity; elevational gradient;

   Sammanfattning : Climate change in the Arctic has profound effects on tundra vegetation, directly through increasing temperatures and indirectly through changes in plant community composition and nutrient cycling. Fertilization experiments are widely used to study the effects of increased nutrient availability on arctic tundra vegetation. LÄS MER

4. 3. Legacy effects of temperature alterations on microbial resistance and resilience to drying and rewetting

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Franklin Lee Harris; [2023]
   Nyckelord :microbial ecology; soil; carbon dynamics; high latitudes; climate change; moisture stress; isotopes; respiration; trait based ecology; soil microbes; Environmental Changes in High Latitudes EnCHIL ; Earth and Environmental Sciences; Biology and Life Sciences;

   Sammanfattning : With warming in soils due to climate change, a series of secondary factors arise, which have multifaceted effects on soil microbial communities. Of these, alterations to soil moisture are among the most crucial to understanding how microbial functions will change in the face of climate change. LÄS MER

5. 4. ARCTIC MYCORRHIZAL INTERACTIONS UNDER CLIMATE CHANGE

   Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

   Författare :Otto Minas; [2022-07-06]
   Nyckelord :Climate change; Arctic ecology; arbuscular mycorrhiza; graminoids; plant ecology; soil ecology; carbon cycle.;

   Sammanfattning : The Arctic is experiencing climate change at an extreme rate, affecting both the rates of plant growth and nutrient cycling. Due to the changes in temperature, but also in nutrient cycling, with increased nutrient mineralization and decreasing P:N ratio (phosphorus, P and nitrogen, N), the arbuscular mycorrhizal fungi (AM) that are prevalent in warmer soils have shown the potential to increase in the otherwise unfavorable Arctic environment. LÄS MER

7. 5. Variation in protein precipitation and phenolic content within and among species across an elevational gradient in subarctic Sweden

   Magister-uppsats, SLU/Dept. of Forest Ecology and Management

   Författare :Elin Olofsson; [2010]
   Nyckelord :Phenolic compounds; Protein complexation; Elevational gradient; Subarctic; Fertility gradient;

   Sammanfattning : This project investigated how elevation and vegetation type influences variation in plant litter phenolic content and protein precipitation capacity among and within common plant species for two different vegetation types, heath and meadow, in a subarctic ecosystem in the Abisko region of northern Sweden. As nutrient availability generally decreases with increasing elevation as a result of decreasing temperature, I hypothesised that phenolic content would increase with elevation and be higher on the heath than the meadow. LÄS MER