Essays about: "Arctic vegetation"

Showing result 11 - 15 of 50 essays containing the words Arctic vegetation.

1. 11. Influence of permafrost disintegration on wetland carbon fluxes in Abisko, Sweden

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Aida Esmailzadeh Davani; [2021]
   Keywords : Physical Geography; Ecosystem Analysis; Permafrost; CH4 flux; CO2 flux; Abisko; Wetlands; Earth and Environmental Sciences;

   Abstract : The northern permafrost regions are experiencing a rapid warming as surface temperatures are rising, causing a disintegration of permafrost and a deepening of the active layer (AL). This releases previously frozen carbon, making it available for decomposition by microbes. READ MORE

3. 12. Effects of the 2018 drought on mire productivity in Skogaryd - Evaluation of ground sensors, satellite data and meteorological data

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Ines Júlio Alfredo; [2021]
   Keywords : Sentinel 2; Vegetation Indices; Ground Sensors; Drought and Mire; Earth and Environmental Sciences;

   Abstract : The drought is a complex meteorological phenomenon associated with low precipitation and low water saturation in atmosphere, soils and plants and can has a great effect on aboveground biomass and change the structure and function of the ecosystems. The droughts also are known to reduce the primary and secondary productivity of vegetation. READ MORE

4. 13. Impact of vegetation mycorrhizal type on fungal community composition in arctic tundra

   University essay from SLU/Dept. of Soil and Environment

   Author : Leah Kirchhoff; [2021]
   Keywords : arctic climate change; shrubification; fungal metabarcoding; ectomycorrhiza; ericoid mycorrhiza;

   Abstract : on the effects of vegetation and associated changes on above and below-ground processes in tundra soils. In a sub-arctic alpine tundra heath, vegetation composition was manipulated by removing plant species with certain mycorrhizal associations. READ MORE

5. 14. Estimating active layer thickness at the high Arctic study site Zackenberg from remotely sensed ground subsidence

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Lotte Wendt; [2021]
   Keywords : active layer thickness; DInSAR; subsidence; permafrost; Zackenberg; CALM; Earth and Environmental Sciences;

   Abstract : The active layer thickness (ALT) is an indicator of permafrost thaw, which potentially leads to the release of large amounts of greenhouse gases under global warming, and thus could further amplify climate change. The thaw depth of the active layer also governs seasonal surface deformation, caused by the volume change between ice to water, which poses risks for slope stability and infrastructure foundations. READ MORE

6. 15. Legacy effects of spring temperature anomalies on seasonal productivities in northern ecosystems

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Hanna Marsh; [2021]
   Keywords : Physical geography; Ecosystem analysis; Northern ecosystems; Legacy effects; Climate Change; Gross Primary Production; Earth and Environmental Sciences;

   Abstract : Legacy effects of spring temperature anomalies on seasonal productivities in northern ecosystems Direct and lagged effects from spring temperature anomalies for the time-period 2001-2018 have been investigated for northern ecosystems (> 30°N). Three different data sets of Gross Primary Production (GPP) estimates (GOSIF, NIRvGPP and FLUX GPP) have been used in tandem with concurrent climate data to find significant correlations between spring growth and temperature anomalies and subsequent growing seasons. READ MORE