Size structure of populations within populations: leaf number and size in crowded and uncrowded Impatiens pallida individuals

Research output: Contribution to journalJournal articleResearchpeer-review

We compared the size distributions of leaves on naturally-occurring crowded and experimentally thinned "uncrowded" individuals of Impatiens pallida in southeastern Pennsylvania. Crowding decreased the number of leaves on individual plants and altered the distribution of leaf size. Crowded individuals had smaller leaves, but the size (length) inequality of the leaf population did not change. The relationships between the height of a plant and the mean and maximum length of its leaves were significantly different for crowded and uncrowded plants. There were weak positive relationships between height and total leaf area, and height and total number of leaves for uncrowded plants, whereas crowded plants showed tighter but curvilinear relationships between these variables. Our results point out the strengths and the limitations of viewing canopies as populations of modules.

Original languageEnglish
Issue number3
Pages (from-to)327-331
Number of pages5
Publication statusPublished - 1 Jan 1991

    Research areas

  • Competition, Demography, Impatiens pallida, Modules, Size

ID: 224650745