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The abundance and distribution of rattan over an elevation gradient in Sulawesi, Indonesia [An article from: Forest Ecology and Management]
Book Details
Author(s)S.F. Siebert
PublisherElsevier
ISBN / ASINB000RR2SYC
ISBN-13978B000RR2SY6
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Forest Ecology and Management, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The rattan flora of Central Sulawesi is abundant, species rich and patchily distributed in lowland and montane forests. I recorded the abundance and distribution of rattan on five randomly established 10mx1000m transects between 830 and 1330m elevation and associated changes in forest canopy heights, photosynthetically active radiation (PAR) and soil characteristics. Rattans were observed at all sites and elevations (100% of 10mx10m sample plots in the transects contained rattan), but exhibited the greatest diversity (species richness) between 1180 and 1280m elevation. Overall (all species and elevations), there was an average of 314 mature rattan genets per hectare. The two most prominent rattans in terms of size, abundance and distribution, Calamus zollingeri and Daemonorops robusta, averaged 62 and 40genets/ha overall, respectively. Several other rattans, including C. leiocaulis, C. leptostachys, and C. ornatus occurred on all transects and all elevations. In contrast, C. didymocarpus, C. minahassae, C. symphysipus and Korthalsia celebica were patchily distributed, and C. didymocarpus and C. sp. ('kalaka') were restricted to higher elevations. Resident cane collectors differentiate C. zollingeri and D. robusta into low and high elevation forms on the basis of morphological and growth characteristics, but this distinction is not discernable in sterile specimens. Based on local classification, lowland forms of C. zollingeri and D. robusta were replaced by high elevation forms over less than 200m vertical elevation which corresponds to the transition from upper lowland to montane forests. The mean canopy height of upper lowland forest between 900 and 1000m was significantly greater than that of montane forests between 1100 and 1300m (30.0 and 21.2m, respectively). Soils in upper lowland forests had significantly higher concentrations of NO"3 and P, significantly lower organic matter levels and higher pH than montane soils in both O and A/E soil horizons. PAR levels did not vary significantly by forest type. Most large diameter rattans are marketed under a single trade name and cannot be distinguished by cane characteristics. These findings have significance for biodiversity conservation and management because rattan harvesting is widespread and unmanaged, and the Sulawesi rattan flora remains poorly known taxonomically and ecologically.
Description:
The rattan flora of Central Sulawesi is abundant, species rich and patchily distributed in lowland and montane forests. I recorded the abundance and distribution of rattan on five randomly established 10mx1000m transects between 830 and 1330m elevation and associated changes in forest canopy heights, photosynthetically active radiation (PAR) and soil characteristics. Rattans were observed at all sites and elevations (100% of 10mx10m sample plots in the transects contained rattan), but exhibited the greatest diversity (species richness) between 1180 and 1280m elevation. Overall (all species and elevations), there was an average of 314 mature rattan genets per hectare. The two most prominent rattans in terms of size, abundance and distribution, Calamus zollingeri and Daemonorops robusta, averaged 62 and 40genets/ha overall, respectively. Several other rattans, including C. leiocaulis, C. leptostachys, and C. ornatus occurred on all transects and all elevations. In contrast, C. didymocarpus, C. minahassae, C. symphysipus and Korthalsia celebica were patchily distributed, and C. didymocarpus and C. sp. ('kalaka') were restricted to higher elevations. Resident cane collectors differentiate C. zollingeri and D. robusta into low and high elevation forms on the basis of morphological and growth characteristics, but this distinction is not discernable in sterile specimens. Based on local classification, lowland forms of C. zollingeri and D. robusta were replaced by high elevation forms over less than 200m vertical elevation which corresponds to the transition from upper lowland to montane forests. The mean canopy height of upper lowland forest between 900 and 1000m was significantly greater than that of montane forests between 1100 and 1300m (30.0 and 21.2m, respectively). Soils in upper lowland forests had significantly higher concentrations of NO"3 and P, significantly lower organic matter levels and higher pH than montane soils in both O and A/E soil horizons. PAR levels did not vary significantly by forest type. Most large diameter rattans are marketed under a single trade name and cannot be distinguished by cane characteristics. These findings have significance for biodiversity conservation and management because rattan harvesting is widespread and unmanaged, and the Sulawesi rattan flora remains poorly known taxonomically and ecologically.
