The Reproductive Ecology of an Emergent Dipterocarp in a Lowland Rain Forest in Sarawak
作者:
KUNIYASU MOMOSE,
TERUYOSHI NAGAMITSU,
TAMIJI INOUE,
期刊:
Plant Species Biology
(WILEY Available online 1996)
卷期:
Volume 11,
issue 2‐3
页码: 189-198
ISSN:0913-557X
年代: 1996
DOI:10.1111/j.1442-1984.1996.tb00145.x
出版商: Blackwell Publishing Ltd
关键词: pollination;selective abortion;seed predation;reproductive effort;Dipterocarpaceae
数据来源: WILEY
摘要:
AbstractThis paper reports the first direct observation of reproductive processes of an emergent tree,Dryobalanops lanceolata(Dipterocarpaceae), and its interactions with pollinators and seed predators, using a canopy observation system built in Sarawak, Malaysia.D. lanceolataflowers were mostly pollinated by medium‐sized stingless bees (Trigonaspp., Apidae), and stigmas of all unbagged flowers received pollen grains. Ovaries did not develop without pollination. Abortion rate in the early stage of fruit development was 93% in fruits fertilized by natural pollinators. All the experimentally selfed ovaries were aborted at this stage. Despite the heavy abortion rate, the dry weight loss at this stage was only 17% of the total reproductive effort, because abortion occurred before active investment in fruits. Among the remaining fruits, 40% were lost to the primary seed predator,Mecysolobus crassus(Curculionidae). Such attacked fruits were also selectively aborted at the middle stage of fruit maturation. Final germinating fruits, which were 3.6% of the total number of flowers, got 47% of the total reproductive effor
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