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Science 26 October 2001:
Vol. 294. no. 5543, pp. 793 - 795
DOI: 10.1126/science.1066860
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Perspectives

PHENOLOGY:
Responses to a Warming World

Josep Peñuelas and Iolanda Filella

Animal and plant life cycles are increasingly shown to depend on temperature trends and patterns. In their Perspective, Peñuelas and Filella review the evidence that global warming during the 20th century has affected the growth period of plants and the development and behavior of animals from insects to birds. The authors warn that changes in the interdependence between species could have unpredictable consequences for ecosystems, that the lengthening of the plant growing season contributes to the global increased carbon fixation, and that changes in phenology may affect not only ecosystems but also agriculture and sanitation.

The authors are in the Unitat Ecofisiologia CSIC-CREAF, Center for Ecological Research and Forestry Applications (CREAF), Edifici C, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain. E-mail: josep.penuelas@uab.es, i.filella@creaf.uab.es

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Science. ISSN 0036-8075 (print), 1095-9203 (online)