Analyses of soil profiles in dwarf-shrub vegetation in south Greenland.

  • 33 Pages
  • 2.67 MB
  • English
C. A. Reitzel , København
Plant ecology -- Greenland., Soils -- Anal



SeriesMeddelelser om Grønland udgivne aj kommissionen for videnskabelige undersøgelser i Grønland, bd. 178, nr. 5, Meddelelser om Grønland ;, bd. 178, nr. 5.
LC ClassificationsQ115 .D39 bd. 178, nr. 5
The Physical Object
Pagination33 p.
ID Numbers
Open LibraryOL4959904M
LC Control Number76439074

Additional Physical Format: Online version: Hansen, Kjeld, Analyses of soil profiles in dwarf-shrub vegetation in south Greenland. København, C.A. Reitzel, In this study, we have demonstrated clear effects of vegetation height and soil moisture on diversity and composition of spiders and beetles in low Arctic Greenland.

This effect is evident across distances of 10–20 m. Fen, heath, and shrub vegetation hosted distinct arthropod communities differing in both composition and :// Abstract.

During the formative years of northern pedologic studies in Alaska, the term Arctic generally was reserved for the Brooks Range and land to the north.

Some investigators, however, extended the definition to include some of the treeless sectors of western and central ://   The other two soil pits (C44 and C46) lay in patches of Kobresia myosuroides (dry steppe), one pit adjacent to a deflation area and the other one close to dwarf shrub heath.

Deflation areas store least SOC stocks, due to disturbance of vegetation cover and soil :// Sixty-three soil profiles were examined and described. Of these, sixteen were sampled in the Brattahlid, Narsarssuaq, Gardar, Hvalsey and Godthåb areas (Fig.

m east of ruins; and Profile 20 from the west-facing slopes north of the airport at Godthåb. Laboratory analyses ?doi=&rep=rep1&type=pdf.

Within the flux tower soil profiles, temperature and volumetric water content (VWC) were also measured at depths of 10, 20 and 40 cm. Temperatures were measured using soil temperature probes (modelCampbell Scientific Inc., Logan, UT, USA), and VWC was measured at the same depths using time-domain reflectometry (model CSL soil LÖFFLER, J.

() Reindeer Grazing Impact on Arctic-Alpine Landscapes in Western Greenland, and Central and Northern Norway. Geoöko, 26, 1– Doi: /jtbx. LÖFFLER, J. () Snow Cover Dynamics, Soil Moisture Variability and Vegetation Ecology in Central Norwegian High Mountain  › Startseite › Forschung › Arbeitsgruppen › Arbeitsgruppe Löffler.

Analyses of potential carry‐over effects: superposed epoch analysis. To identify the immediate and carry‐over effect of the outbreak events on shrub growth and xylem anatomy, we applied the superposed epoch analysis (Holmes & Swetnam, ; Swetnam & Betancourt, ).

After identifying the outbreak year, an 11‐year window (spanning Twenty‐six soil profiles were described across a 4‐km transect from the valley floor (‐m elevation) to an elevation of m (Fig.

1).Vegetation ecotypes across the transect were characterized by Lowland Sedge‐Dryas Meadow and Riverine Birch, Alder, and Low Willow Shrub tundra in the floodplain of the Noatak River; Upland Dwarf Birch‐Tussock Shrub and Lowland Alder Tall Shrub LÖFFLER, J.

() Reindeer Grazing Impact on Arctic-Alpine Landscapes in Western Greenland, and Central and Northern Norway. Geoöko, 26, 1– Doi: /jtbx. LÖFFLER, J. () Snow Cover Dynamics, Soil Moisture Variability and Vegetation Ecology in Central Norwegian High Mountain :// We investigated soil seed banks and corresponding plant community composition in three contrasting vegetation types in West Greenland, viz.

dwarf shrub heaths, herb slopes and fell‐:// The vegetation at the site consists of lichen heath, with lichens forming the most abundant plant functional group, followed by dwarf shrubs (Löffler ).

Alectoria ochroleuca and Cetraria nivalis are the most abundant lichen species, while B. nana and E.

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hermaphroditum are the dominant dwarf shrub species. Both shrub species grow decumbent The analysis identified vegetation transitions named here as herb → dwarf shrub → herb in Greenland (Fig. 1a,b), Betula → Pinus → Betula in Norway (Fig. 1c,d) and herb → Betula → Picea → Alnus in Ruppert Lake, Alaska with the final part of the sequence (Betula → Picea → Alnus) being recorded in Woody Bottom Pond (Fig.

1e,f). Soils samples were collected from the uppermost mineral soil horizons at a point just outside the southwest corner of each vegetation plot.

Larger soil pits were dug just outside the southwest corner of the 50 m × 50 m grid to fully describe vertical and horizontal variation in the soil :// The vegetation in the sandy regions consisted of open heathlands with light-demanding plants and was probably dominated by dwarf shrub taxa such as E.

nigrum and B. nana (Fig. 3 a, ESM 2). On the other hand, the landscapes of Region C were wooded and dominated by tree birch (probably ://   Evaluation of simulated ozone effects in forest ecosystems against biomass damage estimates from fumigation experiments.

In: Biogeosciences, 15,Authors: Franz, M., Alonso, R., Arneth, A., Büker, P., Elvira, S., Gerosa, G., Emberson et al DOI: /bg Four published ozone damage functions previously used in terrestrial biosphere models were   A year record of natural and anthropogenic soil erosion in South Greenland.

the climate gradually changes from maritime to more continental conditions reflected in the vegetation by an increase in dwarf-shrub heath or scrub which tends to cover most of the ground. Non destructive laboratory :// Soil profiles and measures of soil erosion.

Stratigraphic sections in aeolian soils have been measured at over sites around Eyjafjallajökull, and detailed field mapping is supported by geochemical analyses and radiocarbon dating (DugmoreDugmore and BucklandDugmore and ErskineDugmore et al.Larsen et al.

Cultivating the surface soil to renovate a Grama Rhodes (Chloris gayana e) pasture in northwest Argentine (NOA)Effect of nitrogen fertilization; The utilization of stored soil moistures for forage legumes supply in the dry season in west Timor,?baseid=ZGCY between the above dates.

The lowland vegetation between Cape Farewell (lat. N) and Disko (latitude N) grades from open birchwoods in the most favoured part of the south park-tundra'; cf. Iversen,fig. 10) through willow scrubs into treeless dwarf shrub and grass-sedge heaths, herb mats, and open communities of   Where dwarf-shrubs (i.e.

shrubs vegetation, such as tundra or xeric shrublands), they should be treated as a low version of the shrub stratum (or short shrub substratum). In many vegetation types, dwarf-shrubs may simply   Web view. The plant associations with which the species occurs throughout its range are of two types, tundra vegetation in the north, and sub-alpine dwarf shrub vegetation in the south of its ://   Currently, grazing exclosure is one of the most important grassland management measures for restoring all types of degraded alpine grassland in the Qinghai–Tibetan Plateau (QTP).

The most widely distributed grassland ecosystems across the northeastern QTP are the alpine meadow (AM), alpine meadow steppe (AMS), and alpine steppe (AS). However, whether the impacts of fencing on vegetation   In the numerical vegetation ordination analyses, 30–80 plots from each study site were included.

In total, the data set used for the vegetation ordination analyses contains sample plots with cover estimations on vascular plants, bryophytes, and ://   Eight vegetation types are present: dwarf shrub heaths (dominated by Cassiope tetragona, Salix arctica, Vaccinium uliginosum ssp. microphyllum or Betula nana, depending on soil and duration of snow cover); grasslands, which dry out in summer (Arctagrostis latifolia, Carex bigelowii, C.

misandra, and Eriophorum triste); permanently wet fens   Over time, dwarf shrubs and mosses eventually into and around the tussocks, killing the tussocks.

The authors stated that fire would slow these successional trends by reducing vegetation and organic soil around tussocks and increasing tussock growth and reproduction, unless the fire was so severe that there was no tussock recovery [,].

Description Analyses of soil profiles in dwarf-shrub vegetation in south Greenland. PDF

At Aim To understand better the representation of arctic tundra vegetation by pollen data, we analysed pollen assemblages and pollen accumulation rates (PARs) in the surface sediments of lakes. Location Modern sediment samples were collected from seventy‐eight lakes located in the Arctic Foothills and Arctic Coastal Plain regions of northern Alaska.

Methods For seventy of the lakes, we analysed Moreover, only few High Arctic shrub chronologies cover the recent decade of substantial warming. This study investigates the climatic causes of growth variability of the evergreen dwarf shrub Cassiope tetragona between and in the northernmost polar desert at 83°N in North Greenland.

Meer weergeven Minder weergeven The dominant vegetation compositions showed a clear transformation from shrub-steppe (Salicaceae, Rhododendron, Rosoidaeae, Betula) at – ka to steppe (Ranunculus 1, 2, Tephroseris, Saxifraga) at – ka and to wetland herbs with a portion of dwarf willow (Carex aquatilis, Comarum palustre, Salix) at Wetland vegetation including bogs, fens and mosaic mires is estimated by Christensen et al.

to cover per cent of the entire Torneträsk catchment. This vegetation covered per cent of the area sampled by Dahlberg et al.

Details Analyses of soil profiles in dwarf-shrub vegetation in south Greenland. EPUB

in and per cent when re-sampled in by Hedenås et ://. Qualifications. PhD Geography (University of Southampton) BSc Environmental Science (University of Southampton, First Class Hons).

Career. Associate Professor, University of Exeter Senior Lecturer, University of Exeter Lecturer, University of Exeter Manager of the NERC Equipment Pool for Field Spectroscopy, University of ?web_id=Karen_Anderson&tab=pubs.Vegetation and soil responses to added carbon and nutrients remain six years after discontinuation of long-term treatments.

Bennike, O., & Elberling, B. (). Glacial Rock Flour as Soil Amendment in Subarctic Farming in South Greenland. Land, [ S., Blok, D., & Elberling, B. (). Temperature sensitivity of willow dwarf shrub Abstract. The responses of high latitude ecosystems to global change involve complex interactions among environmental variables, vegetation distribution, carbon dynamics, and water and energy exchange.

These responses may have important consequences for the earth system. In this study, we evaluated how vegetation distribution, carbon stocks and turnover, and water and energy exchange