Estimation of Aboveground Biomass of Acacia Trees in the Hyper-Arid Arava, Israel Using Allometric Analysis—Allometric Equations for Acacia Trees in the Desert  

作　　者：Gidon Winters Casey Alexander Thanh Hoai Tran Giorgio Matteucci Elli Groner Gidon Winters;Casey Alexander;Thanh Hoai Tran;Giorgio Matteucci;Elli Groner(The Dead Sea and Arava Science Center, Masada National Park, Mount Masada, Israel;Eilat Campus, Ben-Gurion University of the Negev, Hatmarim Blv, Eilat, Israel;Arava Institute for Environmental Studies, Ketura, Israel;Department of Molecular Biology and Ecology of Plants, Tel Aviv University, Tel-Aviv, Israel;National Research Council of Italy, Institute for Agricultural and Forestry Systems in the Mediterranean Via Patacca, Ercolano (NA), Italy)

机构地区：[1]The Dead Sea and Arava Science Center, Masada National Park, Mount Masada, Israel [2]Eilat Campus, Ben-Gurion University of the Negev, Hatmarim Blv, Eilat, Israel [3]Arava Institute for Environmental Studies, Ketura, Israel [4]Department of Molecular Biology and Ecology of Plants, Tel Aviv University, Tel-Aviv, Israel [5]National Research Council of Italy, Institute for Agricultural and Forestry Systems in the Mediterranean Via Patacca, Ercolano (NA), Italy

出　　处：《Open Journal of Ecology》2025年第2期194-204,共11页生态学期刊(英文)

摘　　要：Biomass is among the most important state variables used to characterize ecosystems. Estimation of tree biomass involves the development of species-specific “allometric equations” that describe the relationship between tree biomass and tree diameter and/or height. While many allometric equations were developed for northern hemisphere and tropical species, rarely have they been developed for trees in arid ecosystems, limiting, amongst other things, our ability to estimate carbon stocks in arid regions. Acacia raddiana and A. tortilis are major components of savannas and arid regions in the Middle East and Africa, where they are considered keystone species. Using the opportunity that trees were being uprooted for land development, we measured height (H), north-south (C1) and east-west (C2) canopy diameters, stem diameter at 1.3 meters of the largest stem (D1.3 or DBH), and aboveground fresh and dry weight (FW and DW, respectively) of nine trees (n = 9) from each species. For A. tortilis only, we recorded the number of trunks, and measured the diameter of the largest trunk at ground level (D0). While the average crown (canopy) size (C1 + C2) was very similar among the two species, Acacia raddiana trees were found to be significantly taller than their Acacia tortilis counterparts. Results show that in the arid Arava (southern Israel), an average adult acacia tree has ~200 kg of aboveground dry biomass and that a typical healthy acacia ecosystem in this region, may include ~41 tons of tree biomass per km2. The coefficients of DBH (tree diameter at breast height) to biomass and wood volume, could be used by researchers studying acacia trees throughout the Middle East and Africa, enabling them to estimate biomass of acacia trees and to evaluate their importance for carbon stocks in their arid regions. Highlights: 1) Estimations of tree biomass in arid regions are rare. 2) Biomass allometric equations were developed for A. raddiana and A. tortilis trees. 3) Equations contribute to the estimation of carbon stocks in aBiomass is among the most important state variables used to characterize ecosystems. Estimation of tree biomass involves the development of species-specific “allometric equations” that describe the relationship between tree biomass and tree diameter and/or height. While many allometric equations were developed for northern hemisphere and tropical species, rarely have they been developed for trees in arid ecosystems, limiting, amongst other things, our ability to estimate carbon stocks in arid regions. Acacia raddiana and A. tortilis are major components of savannas and arid regions in the Middle East and Africa, where they are considered keystone species. Using the opportunity that trees were being uprooted for land development, we measured height (H), north-south (C1) and east-west (C2) canopy diameters, stem diameter at 1.3 meters of the largest stem (D1.3 or DBH), and aboveground fresh and dry weight (FW and DW, respectively) of nine trees (n = 9) from each species. For A. tortilis only, we recorded the number of trunks, and measured the diameter of the largest trunk at ground level (D0). While the average crown (canopy) size (C1 + C2) was very similar among the two species, Acacia raddiana trees were found to be significantly taller than their Acacia tortilis counterparts. Results show that in the arid Arava (southern Israel), an average adult acacia tree has ~200 kg of aboveground dry biomass and that a typical healthy acacia ecosystem in this region, may include ~41 tons of tree biomass per km2. The coefficients of DBH (tree diameter at breast height) to biomass and wood volume, could be used by researchers studying acacia trees throughout the Middle East and Africa, enabling them to estimate biomass of acacia trees and to evaluate their importance for carbon stocks in their arid regions. Highlights: 1) Estimations of tree biomass in arid regions are rare. 2) Biomass allometric equations were developed for A. raddiana and A. tortilis trees. 3) Equations contribute to the estimation of carbon stocks in a

关 键 词：Acacia raddiana Acacia tortilis Carbon Stocks Desert Ecosystems DESERTIFICATION Allometric Equations 

分 类 号：O17[理学—数学]