Open AccessDry matter economy and reproduction of a temperate forest spring geophyte, Allium ursinum
Author(s) -
Eggert Andreas
Publication year - 1992
Publication title -
ecography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.973
H-Index - 128
eISSN - 1600-0587
pISSN - 0906-7590
DOI - 10.1111/j.1600-0587.1992.tb00007.x
Subject(s) - dry matter , biology , perennial plant , dormancy , temperate climate , biological dispersal , population , inflorescence , reproduction , anemophily , botany , agronomy , ecology , pollination , pollen , demography , germination , sociology , pollinator
For a natural population of Allium ursinum age states are defined on the basis of morphological criteria Differences in the dry matter economy of these age states illustrate the underlying life history Most seeds rest several years m dormancy after maturity It takes on average more than 6 yr until juvenile plants attain the dry matter threshold level for the production of an inflorescence Flowering plants divert 41% of their dry matter gain during spring to reproductive parts (7% to the seeds) Since flowering plants show a marked negative annual dry matter balance, c 81% of them are not able to flower again the next year At the same expense of carbon reserves the formation of daughter bulbs results in a considerably higher number of new ramets than the production of seeds Nevertheless, the investment in seed production is extraordinarily high in relation to other woodland perennials This might be explained by the lack of an effective dispersal of the daughter bulbs By vegetative propagation dense groups of adult ramets develop, which will finally undergo mutual shading