A5029298794- Ecology and Vegetation Dynamics Studies
- Forest ecology and management
- Botany and Plant Ecology Studies
- Plant Water Relations and Carbon Dynamics
- Plant and animal studies
- Tree-ring climate responses
- Plant and Biological Electrophysiology Studies
- Seedling growth and survival studies
- Plant Diversity and Evolution
- Climate change and permafrost
- Plant Parasitism and Resistance
- Peatlands and Wetlands Ecology
- Forest Ecology and Biodiversity Studies
- Plant responses to elevated CO2
- Soil Carbon and Nitrogen Dynamics
- Fire effects on ecosystems
- Tree Root and Stability Studies
- Plant Physiology and Cultivation Studies
- Geology and Paleoclimatology Research
- Botany, Ecology, and Taxonomy Studies
- Fern and Epiphyte Biology
- Botanical Research and Applications
- Cutaneous Melanoma Detection and Management
- Archaeology and ancient environmental studies
- Cephalopods and Marine Biology
Swedish Research Council
2007-2016
KTH Royal Institute of Technology
2016
Abisko Scientific Research Station
1994-2007
Royal Academy of Fine Arts
2001-2007
Uppsala University
1998-2007
Royal Swedish Academy of Sciences
1994-2007
Stockholm University
1994-2005
Swedish University of Agricultural Sciences
2004
Swedish Academy
1998-2001
Chalmers University of Technology
1998
Abstract Whether climate change will turn cold biomes from large long‐term carbon sinks into sources is hotly debated because of the great potential for ecosystem‐mediated feedbacks to global climate. Critical are direction, magnitude and generality responses plant litter decomposition. Here, we present first quantitative analysis major climate‐change‐related drivers decomposition rates in northern worldwide. Leaf litters collected predominant species 33 manipulation experiments...
Nutrient conservation plays an important role in plants adapted to infertile environments. Nutrients can be conserved mainly by extending the life span of plant parts and/or minimizing nutrient content those that are abscissed. Together these two parameters (life and resorption) define mean residence time ( MRT ) a nutrient. In this review we summarize available information on nitrogen resorption span, evaluate their relationship nitrogen, both between within species. Abundant with respect...
Summary Growth and nitrogen (N) economy of mountain birch are reported here in response to temperature change. Mechanisms effects on plant growth temperate–arctic regions discussed the light decreasing rates increasing leaf‐N contents along altitudinal latitudinal gradients. Mountain ( Betula pubescens ssp. czerepanovii) seedlings were grown at two soil temperatures, air temperatures nutrient concentrations a full‐factorial experiment during one growing season northern Sweden. Changes...
Effects of herbivory on radial growth mountain birch (Betula pubescens ssp. tortuosa) were investigated in defoliation experiments a subarctic environment northern Sweden. The effects foliage loss the rate photosynthesis and annual increment assessed to test whether compensation had occurred. Fifty per cent no significant effect ring width. In trees defoliated 100%, rings formed during treatment year each following 3 years only 15-25% as wide corresponding control (...)
1) The population dynamics of the perennial geophytes Pinguicula alpina, P. villosa and vulgaris are presented for first 8 years an on-going study in Swedish Subarctic. 2) Between-year variation density was highest villosa, this species also had steepest depletion curve, suggesting that it has a shorter life-span than other two, perhaps as result its more competitive habitat. short could be effect allocation pattern, since investment flowering structures by is relatively high increases risk mortality
Effects of different winter soil temperature on summertime growth rate individual seedlings mountain birch (Betula pubescens ssp. czerepanovii) were evaluated in an outdoor pot experiment subarctic Sweden. The hypothesis tested was that low could decrease growing-season nutrient uptake capacity and by injury the root system; further, damage should stimulate replacement roots, which be reflected increased biomass allocation to roots. Mountain exposed two temperatures during wintertime...
:Direct and indirect effects of soil temperature on the nitrogen economy growth characteristics mountain birch, Betula pubescens ssp. tortuosa, seedlings were assessed in a subarctic environment close to species' altitudinal distribution limit. One-year-old grown for one season silica sand at three temperatures (5, 10 15°C) two nutrient levels factorial design. Another set was same but natural birch woodland supplied with distilled water only. Nitrogen more strongly affected by than supply...
S ummary The significance of the carnivorous habit Pinguicula vulgaris L. was studied when plants were fed with insects and/or supplied complete nutrient solution in substrate. In most cases, alone or combination fertilizer showed higher values for dry wt, number and length leaves, concentrations nitrogen phosphorus. amount absorbed added to fertilized larger than contained. It is inferred that P. uses both phosphorus from insect. hypothetized some other substance also obtained used uptake...
The annual above-ground turnover of nutrients was compared among 14 wild plant species representing four life-forms (woody evergreen, woody deciduous, graminoid, herb) and growing in two contrastin ...
1. Resorption of nitrogen and dry matter prior to leaf fall was monitored in 40 mountain birch trees [Betula Ehrh. pubescens ssp tortuosa (Ledeb.) Nyman] at four sites during 4 consecutive years. The variation resorption
1 Seedlings of mountain birch Betula pubescens ssp. czerepanovii were grown outdoors, under different environmental conditions, during their first growing season at Abisko, northern Sweden. Winter survival seedlings was studied in relation to growth and nitrogen (N) acquisition rate the previous season. 2 Effects fertilization soil temperature on seedling N analysed a factorial experiment including seven fertilizer levels two treatments. shading neighbours (B. p. Empetrum hermaphroditum)...
Current understanding of the extent, causes for, and consequences variation in nutrient composition plants is limited. Important questions to be addressed include what extent nutrients covary, how flexible ratios are within a population or species, reproduction influences ratios, much mass each other change through ontogeny. This information needed assess physiological ecological plant function as balanced systems acquisition allocation resources. We studied stoichiometry (i.e., ratio...
Resource investment in reproduction and its consequences were compared for three iteroparous plant species, Pinguicula alpina, P. villosa vulgaris, a subarctic environment. (dry matter, nitrogen phosphorus) was estimated as reproductive effort, RE, the relative somatic cost of reproduction, RSC, decreased post-breeding survival reproduction. The allocation varied from 0.2 (N & P large alpina plants) to 0.7 matter small villosa) (...)
Physiological integration in clonal plants, which can be assumed to dependent on vascular connections among ramets, is associated with several potential benefits, especially nutrient-poor env ...