Foliar Nutrient Dynamics of Five Dominant Plant Species in Yuanyang Lake Nature Preserve, Taiwan
Resource
Taiwania,49(一)
Journal
Taiwania
Journal Volume
49
Journal Issue
一
Pages
-
Start Page
49
End Page
56
Date Issued
2004
Date
2004
Author(s)
DOI
246246/2006121215551008
Abstract
The vegetation composition of Yuanyang Lake (YYL), a subalpine natural preserve in
Taiwan, could be divided into two major communities, the coniferous-hardwood and the swamp
communities. Nutrient contents of N, P, K and Mg in mature and senescent leaves of Chamaecyparis
obtuse var. formosana and Rhododendron formosanum, dominating the coniferous-hardwood
community, Sparganium fallax, Schoenoplectus mucronatus subsp. robustus, and Miscanthus
transmorrisonensis, the swamp community, were measured in April, July and October of 2002 and
January of 2003. The objectives of this study were to compare the seasonal changes in nutrient
contents of leaves among the five species and to determine the extent of nutrient loss in these species
prior to leaf fall. In general, mature leaves of marsh plants had higher N, P and K contents than those
of the two terrestrial plants. Among the nutrients measured, only Mg contents showed consistently
seasonal trend. Mature and senescent leaves of the five species had consistently higher Mg contents in
April than those collected in other seasons. In comparison between mature and senescent leaves,
senescent leaves always had significantly lower N, P, and K contents than mature leaves, indicating
loss of these nutrients from aging leaves. Potassium was the greatest among the nutrients lost. In
comparison between terrestrial and marsh plants, senescent leaves of marsh plants lost significantly
more P than those of the two terrestrial plants.
Subjects
Nutrients
Senescent
YYL
Rhododendron formosanum
Chamaecyparis obtuse
Sparganium fallax
Schoenoplectus mucronatus
Miscanthus transmorrisonensis
Publisher
臺北市：國立台灣大學生態學與演化生物學研究所
Type
journal article
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