I. Impens

发表

Measurement of gap fraction of fractal generated canopies using digitalized image analysis

Reinhart Ceulemans, R. Ceulemans, S. G. Chen, 1993 .

Effects of plant canopy structure on light interception and photosynthesis

Reinhart Ceulemans, S. G. Chen, R. Ceulemans, 1994 .

A fractal-based Populus canopy structure model for the calculation of light interception

R. Ceulemans, S. G. Chen, I. Impens, 1994 .

Twist number statistics as an additional measure of habitat perimeter irregularity

J. Bogaert, R. Moermans, I. Impens, 1999, Environmental and Ecological Statistics.

Leaf nitrogen content as a predictor of photosynthetic capacity in ambient and global change conditions

I. Impens, I. Nijs, T. Behaeghe, 1995 .

The Interior-to-Edge Breakpoint Distance as a Guideline for Nature Conservation Policy

J. Bogaert, I. Impens, David Salvador-Van Eysenrode, 2001, Environmental management.

Estimates of the diffusion resistance of some large sunflower leaves in the field.

I. Impens, L. A. Hunt, E. Lemon, 1967, Plant physiology.

Canopy gap edge determination and the importance of gap edges for plant diversity

Jan Bogaert, P Van Hecke, D Salvador-Van Eysenrode, 2002 .

Influence of tree-fall orientation on canopy gap shape in an Ecuadorian rain forest

J. Bogaert, I. Impens, P. Hecke, 1998, Journal of Tropical Ecology.

Towards a Quantification of Ecological Theory: The Importance of Multivariate Analysis and of an Accurate Diversity Measurement

R. Ceulemans, J. Bogaert, I. Impens, 2002, Acta biotheoretica.

An improvement on area-perimeter ratios for interior-edge evaluation of habitats.

Jan Bogaert, J. Bogaert, I. Impens, 1998 .

Influence of High Temperature on End-of-Season Tundra CO2 Exchange

I. Impens, F. Kockelbergh, I. Nijs, 2001, Ecosystems.

Simulation of space measurements of vegetation canopy bidirectional reflectance factors

Ranga B. Myneni, Ghassem R. Asrar, I. Impens, 1993 .

Climate Warming Postpones Senescence in High Arctic Tundra

J. Pontailler, I. Impens, F. Kockelbergh, 2004 .

Water Vapour and Carbon Dioxide Diffusion Resistances of Four Hevea brasiliensis Clonal Seedlings

I. Impens, Z. Samsuddin, 1978, Experimental Agriculture.

Diffusive resistances at, and transpiration rates from leaves in situ within the vegetative canopy of a corn crop.

D. W. Stewart, I. Impens, L. Allen, 1966, Plant physiology.

Free Air Temperature Increase (FATI): a new tool to study global warming effects on plants in the field

I. Impens, F. Kockelbergh, I. Nijs, 1996 .

Direct effects of acidic wet deposition on photosynthesis and stomatal conductance of two Populus clones (P. cv. Beaupré and P. cv. Robusta)

I. Impens, C. Martens, K. Landuydt, 1989 .

Competition in a Global Change Environment: The Importance of Different Plant Traits for Competitive Success

I. Impens, P. Hecke, I. Nijs, 1995 .

Vegetation, Modelling and Climatic Change Effects.

F. Veroustraete, R. Ceulemans, D. Hall, 1997 .

Effects of elevated atmospheric carbon dioxide on gas exchange and growth of white clover

I. Impens, I. Nijs, T. Behaeghe, 1988, Photosynthesis Research.

Leaf and canopy responses of Lolium perenne to long-term elevated atmospheric carbon-dioxide concentration

I. Impens, I. Nijs, T. Behaeghe, 1989, Planta.

Genetic variation in aspects of leaf growth of Populusclones, using the leaf plastochron index

R. Ceulemans, I. Impens, V. Steenackers, 1988 .

Variations in photosynthetic, anatomical, and enzymatic leaf traits and correlations with growth in recently selected Populus hybrids.

R. Ceulemans, I. Impens, V. Steenackers, 1987 .

Effects of rising atmospheric carbon dioxide concentration on gas exchange and growth of perennial ryegrass

I. Impens, I. Nijs, T. Behaeghe, 1988 .

Effects of long-term elevated atmospheric CO2 concentration on Lolium perenne and Trifolium repens canopies in the course of a terminal drought stress period

I. Impens, I. Nijs, T. Behaeghe, 1989 .

Geometrical considerations for evaluation of reserve design

J. Bogaert, I. Impens, P. Hecke, 2001 .

The susceptibility of PS II of Lolium perenne to a sudden fall in air temperature—response of plants grown in elevated CO2 and/or increased air temperature

I. Impens, I. Nijs, M. Barták, 1998 .

Influence of Fertilization Level on Gas Exchange, Structural, and Growth Characteristics of Azalea1

R. Ceulemans, I. Impens, R. Gabriels, 1982, HortScience.

NET CO2 EXCHANGE RATE AS A SENSITIVE INDICATOR OF PLANT WATER STATUS IN CORN (Zea mays L.)

R. Ceulemans, M. Laker, I. Impens, 1988 .

A Reference Value for the Interior-to-Edge Ratio of Isolated Habitats

J. Bogaert, I. Impens, P. Van Hecke, 1999 .

The wood productivity of two poplar clones (Populus trichocarpa × Populus deltoides) as affected by stocking and age

R. Ceulemans, I. Impens, W. Galiński, 1991 .

Climate Warming Postpones Senescence in High Arctic

I. Impens, F. Kockelbergh, F. Marchand, 2005 .

Diurnal changes in the response of canopy photosynthetic rate to elevated CO2 in a coupled temperature-light environment

I. Impens, P. Hecke, I. Nijs, 1992, Photosynthesis Research.

Alternative area-perimeter ratios for measurement of 2D shape compactness of habitats

Ronald Rousseau, Jan Bogaert, Piet Van Hecke, 2000, Appl. Math. Comput..

The response of CO2 exchange rate to photosynthetic photon flux density for several Populus clones under laboratory conditions

R. Ceulemans, R. Moermans, I. Impens, 1980, Photosynthesis Research.

Net CO2 exchange rates and diffusion resistance of leaves from chicory selections during vegetative growth

I. Impens, H. Huygens, J. Lips, 1983, Biologia Plantarum.

Stomatal conductance and stomatal behavior in Populus clones and hybrids

R. Ceulemans, I. Impens, R. Imler, 1988 .

MORPHOLOGICAL AND PHYSIOLOGICAL INDICATORS OF TOLERANCE TO ATMOSPHERIC STRESS IN TWO SENSITIVE AND TWO TOLERANT TEA CLONES IN SOUTH AFRICA

R. Samson, R. Lemeur, G. Olyslaegers, 2002, Experimental Agriculture.

Water movement in the soil poplar atmosphere system. i. comparative study of stomatal morphology and anatomy, and the influence of stomatal density and dimensions on the leaf diffusion characteristics in different poplar clones

R. Ceulemans, R. Lemeur, R. Moermans, 1978 .

Leaf gas exchange processes and related characteristics of seven poplar clones under laboratory conditions

R. Ceulemans, I. Impens, 1980 .

Stomatal response of hybrid poplar to incident light, sudden darkening and leaf excision

R. Ceulemans, T. Hinckley, I. Impens, 1989 .

Elevated CO2and Temperature have Different Effects on Leaf Anatomy of Perennial Ryegrass in Spring and Summer

I. Impens, I. Nijs, T. Behaeghe, 1996 .

Photosynthetic Performance of Poplar Leaves at Different Levels in the Canopy

I. Impens, P. V. Elsacker, 1984 .

Photosynthesis and diffusion resistances to carbon dioxide in Hevea brasiliensis muel. agr. clones

I. Impens, Z. Samsuddin, 2004, Oecologia.

Photosynthetic rates and diffusion resistances of sevenHevea brasiliensis muell. arg. clones

I. Impens, Z. Samsuddin, 1979, Biologia Plantarum.

Photosynthetic, Morphological, and Biochemical Gas Exchange Characteristics in Relation to Growth of Young Cuttings of Populus Clones

R. Ceulemans, I. Impens, 1984 .

Photosynthetic Capacity, Leaf Development, Growth and Productivity of Sugar Beet under Optimal Nitrogen Supply

J. Feyen, R. Ceulemans, I. Impens, 1987 .

Effects of supplemental irradiation with HID lamps, and NFT gutter size on gas exchange, plant morphology and yield of strawberry plants

R. Ceulemans, I. Impens, W. Baets, 1986 .

Variations among physiological, morphological and biochemical characteristics of evergreen azalea (Rhododendron simsii Planch.) cultivars

R. Ceulemans, I. Impens, N. Ibrahim, 1984 .

Effect of fertilization level on some physiological, morphological and growth characteristics of Ficus benjamina

R. Ceulemans, I. Impens, R. Gabriels, 1983 .

Seasonal variations in photosynthetic capacity, growth, leaf development and productivity of sugar beet plants under optimal nitrogen supply.

J. Feyen, R. Ceulemans, I. Impens, 1990 .

Ribulose-1, 5-bisphosphate carboxylase activity, chlorophyll and protein concentrations in differentPopulus clones

R. Ceulemans, I. Impens, F. Assche, 2008, Biologia Plantarum.

The importance of the ratio UV‐B/photosynthetic active radiation (PAR) during leaf development as determining factor of plant sensitivity to increased UV‐B irradiance: effects on growth, gas exchange and pigmentation of bean plants (Phaseolus vulgaris cv. Label)

I. Impens, G. Deckmyn, C. Martens, 1994 .

Trifolium repens L. cv. Blanca) Sward

I. Impens, T. Behaeghe, I. Nus, 1989 .

A Very Sensitive Electric Dendrograph for Recording Radial Changes of a Tree

I. Impens, J. Schalck, 1965 .

ECOPHYSIOLOGICAL ASPECTS OF HIGH DENSITY PLANTING RELATED TO HEVEA BRASILIENSIS LATEX PRODUCTION

I. Impens, Z. Samsuddin, 1978 .

Effects of elevated CO2 concentration and climate-warming on photosynthesis during winter in Lolium perenne

I. Impens, I. Nijs, 1996 .

Development of Leaf Blade Class Concept for the Characterisation of Hevea brasiliensis MueL Arg. Leaf Age

I. Impens, Z. Samsuddin, Khir ABD. Rahman, 2004 .

Forest canopy perforation in time and space in Amazonian Ecuador.

J. Bogaert, I. Impens, P. Hecke, 2000 .

Canopy gap morphology determinants in an Amazonian rain forest.

J. Bogaert, I. Impens, D. S. Eysenrode, 1999 .

Photosynthesis, Stomatal Conductance and Leaf Water Potential during Water Stress Situations in Young Rubbertrees ( Hevea brasiliensis ) Under Tropical Conditions

R. Ceulemans, I. Impens, A. Ng, 1983 .

Comparative study of photosynthesis, transpiration, diffusion resistances and water-use efficiency of two azalea cultivars

R. Ceulemans, I. Impens, R. Gabriels, 1980 .

Antitranspirant effects on transpiration, net CO2 exchange rate and water-use efficiency of azalea

R. Ceulemans, I. Impens, R. Gabriels, 1983 .

Underlying effects of resource use efficiency in diversity‐productivity relationships

I. Impens, I. Nijs, 2000 .

A procedural approach for studying the radiation regime of infinite and truncated foliage spaces. Part II. Experimental results and discussion

R. Myneni, I. Impens, 1985 .

A procedural approach for studying the radiation regime of infinite and truncated foliage spaces. Part I. Theoretical considerations

R. Myneni, I. Impens, 1985 .

Canopy architecture, irradiance distribution on leaf surfaces and consequent photosynthetic efficiencies in heterogeneous plant canopies. Part II. Results and discussion

R. Myneni, G. Asrar, E. Kanemasu, 1986 .

Biological diversity and probability of local extinction of ecosystems

I. Impens, I. Nijs, 2000 .

Temporal variation of species composition and species diversity in permanent grassland plots with different fertilizer treatments

I. Impens, P. Hocke, T. Behaeghe, 1981, Vegetatio.

The radiation balance of several field crops

R. Lemeur, I. Impens, 1969 .

Preliminary Wind Tunnel Studies of the Photosynthesis and Evapotranspiration of Forage Stands 1

I. Impens, L. A. Hunt, E. Lemon, 1967 .

Spatial and temporal variation of net radiation in crop canopies

R. Lemeur, R. Moermans, I. Impens, 1970 .

UV‐B increases the harvest index of bean (Phaseolus vulgaris L.)

I. Impens, G. Deckmyn, 1995 .

Seasonal responses of six Poaceae to differential levels of solar UV-B radiation

I. Impens, G. Deckmyn, 1999 .

Effects of solar UV-B irradiation on vegetative and generative growth of Bromus catharticus

I. Impens, I. Impens, G. Deckmyn, 1998 .

Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ions

I. Impens, P. V. Elsacker, 1989 .

Comparative Net Photosynthesis of Four Hevea brasiliensis Clonal Seedlings

I. Impens, Z. Samsuddin, 1978, Experimental Agriculture.

Stomatal regulation in a changing climate: a field study using Free Air Temperature Increase (FATI) and Free Air CO2 Enrichment (FACE)

I. Impens, I. Nijs, H. Blum, 1997 .

The effect of long-term exposure of Lolium perenne L. plants toelevated CO2 and/or elevated air temperature on quantum yieldof PS II and net photosynthesis

I. Impens, I. Nijs, M. Barták, 1996 .

Stomatal and anatomical leaf characteristics of 10 Populus clones

R. Ceulemans, I. Impens, V. Steenackers, 1984 .

Quantifying habitat edge for nature reserve design.

J. Bogaert, I. Impens, P. Hecke, 1998 .

Factors determining the longwave radiation exchange over natural surfaces

I. Impens, D. Wouters, H. Keppens, 1980 .

Simulation of climate change with infrared heaters reduces the productivity of Lolium perenne L. in summer

I. Impens, I. Nijs, H. Blum, 1996 .

Contrasting CO2 and temperature effects on leaf growth of perennial ryegrass in spring and summer

I. Impens, I. Nijs, T. Behaeghe, 1996 .

Effects of Different CO2 Environments on the Photosynthesis-Yield Relationship and the Carbon and Water Balance of a White Clover (Trifolium repens L. cv. Blanca) Sward

I. Impens, I. Nijs, T. Behaeghe, 1989 .

Effects of long-term elevated atmospheric carbon dioxide onLolium perenne andTrifolium repens, using a simple photosynthesis model

I. Impens, I. Nijs, 2004, Vegetatio.

Comparative growth analysis of five first year establishment poplar clones (Populus sp.) grown under a short-rotation intensive culture system

I. Impens, F. Mau, 1989 .

Climate-warming Simulation in Tundra: Enhanced Precision and Repeatability with an Improved Infrared-heating Device

I. Impens, F. Kockelbergh, I. Nijs, 2000 .

Climate-warming simulation in tundra: enhanced precision and repeatability with an improved infrared-heating device.

I. Impens, F. Kockelbergh, I. Nijs, 2000 .

A computerised numerical experimental study of average solar radiation penetration in plant stands

S. G. Chen, I. Impens, B. Shao, 1993 .

A simple photographical method for analyzing the radiation interception by an individual tree

P Van Elsacker, H Keppens, I. Impens, 1983 .

ECOPASS -- a multivariate model used as an index of growth performance of poplar clones.

R. Ceulemans, I. Impens, 1982 .

The ratio UV-B/photosynthetically active radiation (PAR) determines the sensitivity of rye to increased UV-B radiation

I. Impens, G. Deckmyn, 1997 .

Combined effects of enhanced UV-B radiation and nitrogen deficiency on the growth, composition and photosynthesis of rye (Secale cereale)

I. Impens, G. Deckmyn, 2004, Plant Ecology.