Community structure and topographic distribution of lianas in a watershed on Okinawa, south-western Japan

Buntarou Kusumoto, Tsutomu Enoki, Yasushi Watanabe

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We investigated spatial distribution of lianas, and examined relationships between distribution and topography in a secondary forest on the northern part of the main island of Okinawa, south-west Japan. All lianas with a stem diameter exceeding 2 cm at a point 1.3 m from the root were inventoried, and stem diameter and root position were measured within a small watershed (16.0625 ha). Geographical information systems (GIS) were used to divide the watershed into 257 cells in total, each cell being 25 m × 25 m. Three topographic parameters were measured in each cell: slope angle, slope aspect and relief. In total, 930 stems from 20 species of lianas were recorded. Distribution of all liana stems and 14 of 15 species analysed were biased toward concave sites. Abundance of total lianas was higher in concave sites than in convex sites. Our results suggest that distribution and abundance of lianas are strongly affected by topography, and that lianas tend to be distributed in sites with more water and nutrients, which are formed by relief in the Okinawa forest. Factors affecting stem density differed among species.

Original languageEnglish
Pages (from-to)675-683
Number of pages9
JournalJournal of Tropical Ecology
Volume24
Issue number6
DOIs
Publication statusPublished - Nov 1 2008

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lianas
Ryukyu Archipelago
community structure
stem
watershed
Japan
stems
relief
topography
slope angle
secondary forest
GIS
secondary forests
cells
spatial distribution
geographic information systems
distribution
nutrient
nutrients
water

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

Cite this

Community structure and topographic distribution of lianas in a watershed on Okinawa, south-western Japan. / Kusumoto, Buntarou; Enoki, Tsutomu; Watanabe, Yasushi.

In: Journal of Tropical Ecology, Vol. 24, No. 6, 01.11.2008, p. 675-683.

Research output: Contribution to journalArticle

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