Resprouting ability of<Emphasis Type="Italic"> Quercus crispula</Emphasis> seedlings depends on the vegetation cover of their microhabitats |
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Authors: | Email author" target="_blank">Daisuke?KabeyaEmail author Akiko?Sakai Kiyoshi?Matsui Satoki?Sakai |
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Institution: | (1) Department of Ecology and Evolutionary Biology, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan;(2) Mount Hakkoda Botanical Laboratory, Graduate School of Science, Tohoku University, Sendai, Japan;(3) Graduate School of Life Science, Tohoku University, Sendai, Japan;(4) Present address: Forestry and Forest Products Research Institute, Kiso Experiment Station, 5473-8 Kisofukushima, Kiso, Nagano 397-0001, Japan;(5) Present address: Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan;(6) Present address: Biological Laboratory, Nara University of Education, Nara, Japan |
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Abstract: | To examine the effects of vegetation cover on the resprouting abilities of Quercus crispula seedlings, in each of three consecutive years, we artificially clipped seedlings growing in microhabitats with differing
degrees of vegetation cover. We also investigated the relationship between the level of total nonstructural carbohydrate (TNC)
and resprouting ability. Seedlings with clipped shoots in gaps produced larger resprouting shoots than those in the understory.
Moreover, both the percentage of resprouting seedlings and the survival ratio in seedlings with clipped shoots were negatively
correlated with the degree of vegetation cover. Seedlings stored high levels of TNC, especially in their roots, and their
TNC levels were negatively correlated with the degree of vegetation cover. There were also positive relationships between
the TNC levels in their roots and the degree of resprouting. Hence, we conclude that release from vegetation cover enhanced
the resprouting ability of Q. crispula seedlings by increasing their levels of stored carbohydrate. The key variables affected were the resprouting ratio (the proportion
of seedlings capable of producing new shoots) and the size of the resprouted shoots. |
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Keywords: | Quercus crispula Resprouting TNC Tree seedling |
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