Norby RJ, Ogle K, Curtis PS, Badeck F-W, Huth A, Hurtt GC, Kohyama T, Peñuelas J (2001) Aboveground growth and competition in forest gap models: an analysis for studies of climatic change. Climatic Change 51:415-447.
Inoue Y, Peñuelas J (2001) An AOTF-based hyperspectral imaging system for field use in ecophysiological and agricultural applications. International Journal of Remote Sensing 22:3883-3888.
Oliveira G, Peñuelas J (2001) Allocation of absorbed light energy into photochemistry and dissipation in a semi-deciduous and an evergreen Mediterranean woody species during winter. Australian Journal of Plant Physiology 28:471-480.
Peñuelas J, Lloret F, Montoya R (2001) Severe drought effects on Mediterranean woody flora in Spain. Forest Science 47:214-218.
Peñuelas J, Filella I (2001) Responses to a warming world. Science 294:793-795.
Peñuelas J, Filella I, Tognetti R (2001) Leaf mineral concentrations of Erica arborea, Juniperus communis and Myrtus communis growing in the proximity of a natural CO2 spring. Global Change Biology 7:291-301.
Peñuelas J, Llusià J (2001) The complexity of factors driving volatile organic compound emissions by plants. Biologia Plantarum 44:481-487.
Llusià J., Peñuelas J. (2001) Emission of volatile organic compounds by apple trees under spider mite attack and attraction of predatory mites. Experimental and Applied Acarology. 25: 65-77.EnllaçDoi: 10.1023/A:1010659826193
Emission rates of volatile organic compounds (VOCs) from Pirus malus L. subsp. mitis (Wallr.) var. Golden Delicious and var. Starking attacked by the phytophagous mite Panonychus ulmi Koch, and their attractiveness to the predatory mites Amblyseius andersoni Chant and Amblyseius californicus McGregor, were studied during three years. A large variability was found in the emission of individual VOCs depending on the infestation, the apple tree variety and the date. There were larger total VOC emission rates and larger total VOC leaf concentrations in apple trees attacked by phytophagous mites, especially in the var. Starking. In infested trees of this variety, there were also more predatory mites. An olfactometer assay showed that predatory mites preferentially chose branches infested by Panonychus ulmi (85% went to infested branches vs 15% to uninfested control branches) indicating that volatiles may be used as cues to find their prey.
Peñuelas J., Filella I. (2001) Phenology: Responses to a warming world. Science. 294: 793-795.EnllaçDoi: 10.1126/science.1066860
[No abstract available]
Peñuelas J., Filella I. (2001) Herbaria century record of increasing eutrophication in Spanish terrestrial ecosystems. Global Change Biology. 7: 427-433.EnllaçDoi: 10.1046/j.1365-2486.2001.00421.x
Additional biological evidence is presented for the alteration of biogeochemical cycles by human activities. The leaf δ15N and the concentrations of nutrients in herbarium specimens of 24 species of vascular plants and 3 species of bryophytes collected in northern and eastern regions of Spain have substantially changed throughout the XX century. In the second half of the century, when anthropogenic nitrogen fixation and mobilization started to increase rapidly, leaf δ15N values started to decrease strongly, indicating that additional anthropogenic nitrogen is being retained in Spanish terrestrial ecosystems. The concentration of nutrients in vascular plants did not present any clear pattern, but there were increasing concentrations of N and other nutrients (P, K, and S) in the last decades in bryophytes, which are usually better biomonitors of airborne chemicals than vascular plants. Important consequences for ecosystem structure and functioning such as enhancement of the carbon sink or changes in community biodiversity and species distribution may be expected from this increase in eutrophication.
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