A5049966105- Remote Sensing in Agriculture
- Species Distribution and Climate Change
- Peatlands and Wetlands Ecology
- Forest ecology and management
- Plant Water Relations and Carbon Dynamics
- Botany and Plant Ecology Studies
- Coastal wetland ecosystem dynamics
- Remote Sensing and LiDAR Applications
- Horticultural and Viticultural Research
- Forest Ecology and Biodiversity Studies
- Ecology and Vegetation Dynamics Studies
- Tree-ring climate responses
- Land Use and Ecosystem Services
- Lichen and fungal ecology
- Hydrology and Watershed Management Studies
- Research Data Management Practices
- Biomedical Text Mining and Ontologies
- Urban Heat Island Mitigation
- Forest Management and Policy
National Museum of Nature and Science
2018-2019
University of Edinburgh
2011-2015
National Institute for Environmental Studies
2014
Abstract Although the effects of atmospheric nitrogen deposition on species composition are relatively well known, roles different forms nitrogen, in particular gaseous ammonia ( NH 3 ), have not been tested field. Since 2002, we manipulated form N to an ombrotrophic bog, W him, deep peat southern S cotland, with low ambient (wet + dry = 8 kg ha −1 yr ) and (4 deposition. A gradient , from 70 down background, 3–4 was generated by free air release. Wet ammonium 4 wet N) provided replicate...
Abstract. Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant stages their response to climate management practices are crudely represented land surface models. As visual observations phenology laborious, there a need supplement long-term with automated techniques such as those provided by digital repeat photography at high temporal spatial resolution. We present first...
Summary Carbon dioxide flux measurements using the eddy covariance (EC) methodology have helped researchers to develop models of ecosystem carbon balance. However, making reliable predictions fluxes is not straightforward due phenological changes and possible abiotic/biotic stresses that profoundly influence tree functioning. To assess canopy state on CO 2 flux, we installed two different digital camera systems at viewing angles (an outdoor webcam with a near‐horizontal view commercial...
Summary The elevational limit of trees (henceforth, the ‘tree line’) is widely considered to be a sensitive indicator environmental change. Here, we document 20th century tree line advance and increase in population at ecotone, along Pinus sylvestris ‐dominated slope north‐eastern Finland, conditions where growth recruitment have generally been linked temperature variation. Using ages (growth 1.3 m height) an transect, compared variation associated with dynamics, seed cone crops, reindeer...
Abstract Wet deposition of nitrogen (N) occurs in oxidized (nitrate) and reduced (ammonium) forms. Whether one form drives vegetation change more than the other is widely debated, as field evidence has been lacking. We are manipulating N wet to an ombrotrophic bog, Whim (Scottish Borders), here report nine years results. Ammonium nitrate were provided rainwater spray NH 4 Cl or NaNO 3 at 8, 24 56 kg ha −1 yr , plus a only control, via automated system coupled site meteorology. Detrimental...
Background: To understand how forests and woodland respond to global climate change, phenological observations are being made at a number of sites worldwide. Recently, digital cameras have been deployed as part the existing network ecosystem CO2 flux towers provide time-series canopy images, various numerical indices so far used by different authors. Aims: identify which most effective colour calculate from signals extracted cameras, in order recommendations scientific community. Methods:...
Summary Digital images of tree canopies have been analysed to understand how forest phenology responds climate change. Researchers used different colour indices carry out quantitative analyses, but uncertainties over the performance various are hampering progress in their use. To compare under controlled conditions, we carried experiments using a low‐cost off‐the‐shelf digital camera with set standard charts as model leaves for stages: emerging leaves, yellowish green; newly expanded fully...
Abstract. Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant stages their response to climate management practices are crudely represented land surface models. As visual observations phenology laborious, there a need supplement long-term with automated techniques such as those provided by digital repeat photography at high temporal spatial resolution. We present first...
Background: Forests in subarctic regions inhabit the transitional zone between temperate region and Arctic, where plant survival depends on capability of individuals to adjust changing environments. This zone, generally falling 50° N 70° N, is becoming increasingly vulnerable under a climate, with treelines moving further north also higher up slopes. Aims: The current study was carried out at 68° most sensitive northern limit tree growth Finnish Lapland. physiology trees these conditions...
Abstract Quantitative models play an increasing role in exploring the impact of global change on biodiversity. To win credibility and trust, they need validating. We show how expert knowledge can be used to assess a large number empirical species niche constructed for British vascular plant bryophyte flora. Key outcomes were (a) scored assessments each modeled axis combination, (b) guidance needing further development, (c) exploration trade‐off between presenting more complex model...