Field Measurements for Forest Carbon Monitoring

Hoover, Coeli M.

doi:10.1007/978-1-4020-8506-2

Cited by 49 publications

(2 citation statements)

References 189 publications

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“…The study was performed because the focus of the study was the natural forest of the plant species. Based on the delineation results, measurements were then taken to produce an inventory of the carbon stock, which represents the current state of the forest (Hoover 2008). Furthermore, the cluster sampling method was used to determine the stand density level and then continued with stratified random sampling (Sugiyono 2020;Bentsi-Enchill et al 2022) for random selection of the population with a proportional placement.…”

Section: Inventory Of Eucalyptus Urophyllamentioning

confidence: 99%

Carbon storage potential of Eucalyptus urophylla at several density levels and forest management types in dry land ecosystems

et al. 2022

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Abstract. Marimpan LS, Purwanto RH, Wardhana W, Sumardi. 2022. Carbon storage potential of Eucalyptus urophylla at several density levels and forest management types in dry land ecosystems. Biodiversitas 23: 2830-2837. Tropical forests can store high amounts of carbon because they have suitable environmental factors. Furthermore, they are different from others that grow in dry areas, which tend to experience limited rainfall. Ampupu (Eucalyptus urophylla) is an endemic tree in East Nusa Tenggara, which is continuously damaged. This is caused by various anthropogenic activities, which increase along with the population around the forest. Therefore, this study aims to estimate the carbon content stored in natural forest areas of E. urophylla at different density levels and land use types. Field inventory was carried out in the study location using the stratified sampling method, after which the density levels were divided into three groups, viz. high, medium, and low. Sampling was then carried out in 3 different land-use areas, including production, protection, and conservation forests. Furthermore, a total of 90 plots were used, where each land-use type consists of 30 plots with a size of 25 m × 40 m. The results showed that the carbon content at the low, medium and high-density levels were 108.20, 185.24, and 291.33 MgCha-1, respectively. Values of 211.91, 214.69, and 221.14 MgCha-1 were also obtained from the production, protection, and conservation forests, respectively. Based on the results, the natural forests of E. urophylla have a significant effect on carbon sequestration in East Nusa Tenggara.

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Section: Inventory Of Eucalyptus Urophyllamentioning

confidence: 99%

Carbon storage potential of Eucalyptus urophylla at several density levels and forest management types in dry land ecosystems

et al. 2022

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“…Airborne laser scanning (ALS) has become a widely used remote sensing method for assessing forest structure variables in operational forestry (Andersen, McGaughey & Reutebuch, 2005). The main applications of ALS are forest height map construction (Arumäe & Lang, 2016a;Naesset, 1997a), wood volume and biomass estimation (Bouvier, Durrieu, Fournier, & Renaud, 2015;Guerra-Hernández et al, 2016;Naesset, 1997b;Patenaude et al, 2004, Popescu, Zhao, Neuenschwander, & Lin, 2011, carbon stock monitoring (Bright, Hicke, & Hudak, 2012) and biodiversity mapping (Müller & Vierling, 2014;Smith, Anderson, & Fladeland, 2008). Vertical canopy cover (CC) is the key factor for most of these estimates and when combined with other forest structure parameters it is used for leaf-area index (LAI) mapping (Korhonen & Morsdorf, 2014;Solberg et al, 2009) or could be used for planning of thinnings in forest management (Vastaranta et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Estimation of canopy cover in dense mixed-species forests using airborne lidar data

Arumäe

Lang

2017

European Journal of Remote Sensing

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Airborne laser scanning (ALS) data and digital hemispherical photos (DHP) from 93 sample plots in Laeva test site, Estonia, were used to study effects of phenology and scan angle on the ALS-based canopy cover (CC ALS) estimates. The relative share of first returns (P 1/A) for 6185 forest stands was analysed. The CC ALS was calculated using different height thresholds and echoes, and was compared with the CC estimates based on DHP (CC DHP) and crown model (CC RCrown). The first of many echoes-based canopy cover estimate (CC ALS,1.3_1) saturated at values greater than 80%. The strongest correlation of CC DHP was found with CC ALS,1.3_A using all echoes and a 1.3 m height break (R 2 = 0.81, RMSE = 11.8%). Correcting the estimate for view nadir angle did not improve the correlation of CC ALS,1.3_A with CC DHP. The CC RCrown had a weak correlation (R 2 < 0.25) with CC ALS and with CC DHP. The P 1/A was not influenced by tree species composition, but by phenology, stand relative density and forest height; however, CC ALS was not dependent on stand height. Foliage phenology had a substantial effect on CC ALS and CC DHP. In dense mixed-species forests, we recommend to use all returns for canopy cover estimation.

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Experimental warming increased soil nitrogen sink in the Tibetan permafrost

Chang

Wang

Yang

et al. 2017

J. Geophys. Res. Biogeosci.

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In permafrost soil, warming regulates the nitrogen (N) cycle either by stimulating N transformation or by enhancing cryoturbation, the mixture of soil layers due to repeated freeze thaw. Here N isotopic values (δ15N) of plants and the soil were investigated in a 7 year warming experiment in a permafrost‐affected alpine meadow on the Qinghai‐Tibetan Plateau. The results revealed that warming significantly decreased the δ15N in the plant (aboveground and belowground parts) and different soil fractions (clay and silt fraction, aggregate, and bulk soil). The decreased soil δ15N was associated with an increase in soil N stock due to greater N fixation. The incremental N retention in plants and soil mineral‐associated fractions from warming resulted in a decrease in soil inorganic N, which constrains the role of nitrification/denitrification in soil δ15N, suggesting a restrained rather than an open N cycle. Furthermore, enhanced cryoturbation under warming, identified by a downward redistribution of 137Cs into deeper layers, promoted N protection from transformation. Overall, the decrease in soil δ15N indicated higher rates of N input through fixation relative to N loss through nitrification and denitrification in permafrost‐affected ecosystems under warming conditions.

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Field Measurements for Forest Carbon Monitoring

Cited by 49 publications

References 189 publications

Carbon storage potential of Eucalyptus urophylla at several density levels and forest management types in dry land ecosystems

Carbon storage potential of Eucalyptus urophylla at several density levels and forest management types in dry land ecosystems

Estimation of canopy cover in dense mixed-species forests using airborne lidar data

Experimental warming increased soil nitrogen sink in the Tibetan permafrost

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