Size structure of populations within populations: leaf number and size in crowded and uncrowded Impatiens pallida individuals
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Size structure of populations within populations : leaf number and size in crowded and uncrowded Impatiens pallida individuals. / Berntson, Glenn M.; Weiner, Jacob.
In: Oecologia, Vol. 85, No. 3, 01.01.1991, p. 327-331.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - Size structure of populations within populations
T2 - leaf number and size in crowded and uncrowded Impatiens pallida individuals
AU - Berntson, Glenn M.
AU - Weiner, Jacob
PY - 1991/1/1
Y1 - 1991/1/1
N2 - 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.
AB - 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.
KW - Competition
KW - Demography
KW - Impatiens pallida
KW - Modules
KW - Size
UR - http://www.scopus.com/inward/record.url?scp=0026096315&partnerID=8YFLogxK
U2 - 10.1007/BF00320607
DO - 10.1007/BF00320607
M3 - Journal article
AN - SCOPUS:0026096315
VL - 85
SP - 327
EP - 331
JO - Oecologia
JF - Oecologia
SN - 0029-8519
IS - 3
ER -
ID: 224650745