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The species composition and forest s...

Sun, I-Fang.

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The species composition and forest structure of a subtropical rain forest at southern Taiwan.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The species composition and forest structure of a subtropical rain forest at southern Taiwan./
作者:	Sun, I-Fang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 1993,
面頁冊數:	215 p.
附註:	Source: Dissertations Abstracts International, Volume: 56-04, Section: B.
Contained By:	Dissertations Abstracts International56-04B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9430708

The species composition and forest structure of a subtropical rain forest at southern Taiwan.
Sun, I-Fang.

The species composition and forest structure of a subtropical rain forest at southern Taiwan. - Ann Arbor : ProQuest Dissertations & Theses, 1993 - 215 p.

Source: Dissertations Abstracts International, Volume: 56-04, Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 1993.

This item must not be added to any third party search indexes.

This thesis examines a subtropical rain forest in which a stress gradient (directional wind exposure) generates and interacts with gradients of light, moisture and soil nutrients to produce a sharply differentiated mosaic forest on windward vs. leeward slopes separated by very short distances. This rain forest sits astride low mountains at an elevation of 300 m above sea level, on slope facing northeast into the direction of the prevailing monsoon winds. In 1989 a permanent three hectare plot was established in Nanjenshan Nature Reserve in Ken-Ting National Park on the southern tip of Taiwan. The plot measuring 100 m wide by 300 m long and spans the wind stress gradient from the most exposed to the most protected sites. All free standing woody plants with a stem diameter of at least 1 cm dbh at breast height have been tagged, identified, measured and mapped. A total of 118 species and 36,609 individuals, representing 78 genera and 41 families, were recorded in the census. On windward slopes, the forest is very short in stature (3-5m), unstratified, high in stem density, and low in per-area species richness. Leaves are small and thick, and litterfall rates are low. On leeward slopes and in protected creek bottom, the forest is taller in stature ($<$10m), stratified, low in stem density, and high in per-area species richness. Leaves are larger, thinner, and litterfall rates are much higher. Soil chemistry analyses indicates that the soil of study site are relatively acid and low in available nitrogen and organic carbon. Furthermore, the soil of windward habitat are relatively poorer than those of the leeward habitat. On the other hand, light levels reaching the soil surface are high in the windward forest and low in the leeward forest. The results of TWINSPAN and Chi-square analyses demonstrated that the Nanjenshan forest is highly differentiated into zones with abrupt changes in species composition, and the existence of varying degrees of specialization and generalization of trees species to conditions along the stress gradient. Leaf area and thickness comparison show that individuals of specialists growing outside their preferred habitat exhibited a shift in leaf area and thickness toward the values found in specialized species in that habitat. For generalists found throughout the gradient, however, the shifts in leaf morphology were not as large or as often statistically significant as in specialists. The results of seedling transplantation experiment indicated that all species grew and survived well in a cleared common garden in a sheltered site with high light and a more fertile soil environment. However, all seedlings exhibited reduced growth during the winter monsoon season, strongly suggesting that wind, or associated factors such as low temperature and low irradiance, are responsible for the reduced growth of the seedlings during the winter monsoon.Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

China

The species composition and forest structure of a subtropical rain forest at southern Taiwan.
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100 1 $a Sun, I-Fang. $3 3548153
245 1 4 $a The species composition and forest structure of a subtropical rain forest at southern Taiwan.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1993
300 $a 215 p.
500 $a Source: Dissertations Abstracts International, Volume: 56-04, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Baker, Herbert G.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 1993.
506 $a This item must not be added to any third party search indexes.
506 $a This item must not be sold to any third party vendors.
520 $a This thesis examines a subtropical rain forest in which a stress gradient (directional wind exposure) generates and interacts with gradients of light, moisture and soil nutrients to produce a sharply differentiated mosaic forest on windward vs. leeward slopes separated by very short distances. This rain forest sits astride low mountains at an elevation of 300 m above sea level, on slope facing northeast into the direction of the prevailing monsoon winds. In 1989 a permanent three hectare plot was established in Nanjenshan Nature Reserve in Ken-Ting National Park on the southern tip of Taiwan. The plot measuring 100 m wide by 300 m long and spans the wind stress gradient from the most exposed to the most protected sites. All free standing woody plants with a stem diameter of at least 1 cm dbh at breast height have been tagged, identified, measured and mapped. A total of 118 species and 36,609 individuals, representing 78 genera and 41 families, were recorded in the census. On windward slopes, the forest is very short in stature (3-5m), unstratified, high in stem density, and low in per-area species richness. Leaves are small and thick, and litterfall rates are low. On leeward slopes and in protected creek bottom, the forest is taller in stature ($<$10m), stratified, low in stem density, and high in per-area species richness. Leaves are larger, thinner, and litterfall rates are much higher. Soil chemistry analyses indicates that the soil of study site are relatively acid and low in available nitrogen and organic carbon. Furthermore, the soil of windward habitat are relatively poorer than those of the leeward habitat. On the other hand, light levels reaching the soil surface are high in the windward forest and low in the leeward forest. The results of TWINSPAN and Chi-square analyses demonstrated that the Nanjenshan forest is highly differentiated into zones with abrupt changes in species composition, and the existence of varying degrees of specialization and generalization of trees species to conditions along the stress gradient. Leaf area and thickness comparison show that individuals of specialists growing outside their preferred habitat exhibited a shift in leaf area and thickness toward the values found in specialized species in that habitat. For generalists found throughout the gradient, however, the shifts in leaf morphology were not as large or as often statistically significant as in specialists. The results of seedling transplantation experiment indicated that all species grew and survived well in a cleared common garden in a sheltered site with high light and a more fertile soil environment. However, all seedlings exhibited reduced growth during the winter monsoon season, strongly suggesting that wind, or associated factors such as low temperature and low irradiance, are responsible for the reduced growth of the seedlings during the winter monsoon.
590 $a School code: 0028.
650 4 $a Ecology. $3 516476
650 4 $a Botany. $3 516217
653 $a China
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690 $a 0309
710 2 $a University of California, Berkeley. $3 687832
773 0 $t Dissertations Abstracts International $g 56-04B.
790 $a 0028
791 $a Ph.D.
792 $a 1993
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9430708