Required sample size for estimating soil respiration rates in large areas of two tropical forests and of two types of plantation in Malaysia

Minako Adachi, Yukiko Sakata Bekku, Akihiro Konuma, Wan Rasidah Kadir, Toshinori Okuda, Hiroshi Koizumi

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We estimated the required sample sizes for estimating large-scale soil respiration (for areas from 1 to 2 ha) in four ecosystems (primary and secondary forests, and oil palm and rubber plantations) in Malaysia. The soil respiration rates were 769 ± 329 mg CO2 m-2 h-1 in the primary forest (2 ha, 50 sample points), 708 ± 300 mg CO2 m-2 h-1 in the secondary forest (2 ha, 50 points), 815 ± 363 mg CO2 m-2 h-1 in the oil palm plantation (1 ha, 25 points), and 450 ± 178 mg CO2 m -2 h-1 in the rubber plantation (1 ha, 25 points). According to our sample size analysis, the number of measurement points required to determine the mean soil respiration rate at each site with an error in the mean of no more than 10% ranged from 67 to 85 at the 95% probability level. These results suggest that evaluating the spatial heterogeneity of soil respiration rates in the tropics may require more measurement points than in temperate forests.

Original languageEnglish
Pages (from-to)455-459
Number of pages5
JournalForest Ecology and Management
Volume210
Issue number1-3
DOIs
Publication statusPublished - 2005 May 16
Externally publishedYes

Fingerprint

soil respiration
Malaysia
tropical forests
tropical forest
plantation
plantations
primary forests
Elaeis guineensis
secondary forest
secondary forests
rubber
sampling
oil
temperate forests
temperate forest
tropics
rate
ecosystems
ecosystem
primary forest

Keywords

  • Oil palm plantation
  • Rubber plantation
  • Spatial variability
  • Tropical forest

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Forestry
  • Ecology

Cite this

Required sample size for estimating soil respiration rates in large areas of two tropical forests and of two types of plantation in Malaysia. / Adachi, Minako; Bekku, Yukiko Sakata; Konuma, Akihiro; Kadir, Wan Rasidah; Okuda, Toshinori; Koizumi, Hiroshi.

In: Forest Ecology and Management, Vol. 210, No. 1-3, 16.05.2005, p. 455-459.

Research output: Contribution to journalArticle

Adachi, Minako ; Bekku, Yukiko Sakata ; Konuma, Akihiro ; Kadir, Wan Rasidah ; Okuda, Toshinori ; Koizumi, Hiroshi. / Required sample size for estimating soil respiration rates in large areas of two tropical forests and of two types of plantation in Malaysia. In: Forest Ecology and Management. 2005 ; Vol. 210, No. 1-3. pp. 455-459.
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AB - We estimated the required sample sizes for estimating large-scale soil respiration (for areas from 1 to 2 ha) in four ecosystems (primary and secondary forests, and oil palm and rubber plantations) in Malaysia. The soil respiration rates were 769 ± 329 mg CO2 m-2 h-1 in the primary forest (2 ha, 50 sample points), 708 ± 300 mg CO2 m-2 h-1 in the secondary forest (2 ha, 50 points), 815 ± 363 mg CO2 m-2 h-1 in the oil palm plantation (1 ha, 25 points), and 450 ± 178 mg CO2 m -2 h-1 in the rubber plantation (1 ha, 25 points). According to our sample size analysis, the number of measurement points required to determine the mean soil respiration rate at each site with an error in the mean of no more than 10% ranged from 67 to 85 at the 95% probability level. These results suggest that evaluating the spatial heterogeneity of soil respiration rates in the tropics may require more measurement points than in temperate forests.

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