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  1. AU="Nestor Laurier, Engone Obiang"
  2. AU="Huberty, Fanny"
  3. AU="Ju, Beomsoo"
  4. AU="Yu, Jessica"
  5. AU="Yamada, Hiroyuki"
  6. AU="Uruski, Pawel"
  7. AU="Laranjeiro, Ricardo"
  8. AU="Ahmadi, Reza"
  9. AU="Hoet, Peter H.M."
  10. AU=Sengupta Sohini AU=Sengupta Sohini
  11. AU="Conlon, Dara"
  12. AU=Endeman Henrik AU=Endeman Henrik
  13. AU="New, Sophie E.P"

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  1. Artikel ; Online: Using Model Analysis to Unveil Hidden Patterns in Tropical Forest Structures

    Nicolas Picard / Frédéric Mortier / Pierre Ploton / Jingjing Liang / Géraldine Derroire / Jean-François Bastin / Narayanan Ayyappan / Fabrice Bénédet / Faustin Boyemba Bosela / Connie J. Clark / Thomas W. Crowther / Nestor Laurier Engone Obiang / Éric Forni / David Harris / Alfred Ngomanda / John R. Poulsen / Bonaventure Sonké / Pierre Couteron / Sylvie Gourlet-Fleury

    Frontiers in Ecology and Evolution, Vol

    2021  Band 9

    Abstract: When ordinating plots of tropical rain forests using stand-level structural attributes such as biomass, basal area and the number of trees in different size classes, two patterns often emerge: a gradient from poorly to highly stocked plots and high ... ...

    Abstract When ordinating plots of tropical rain forests using stand-level structural attributes such as biomass, basal area and the number of trees in different size classes, two patterns often emerge: a gradient from poorly to highly stocked plots and high positive correlations between biomass, basal area and the number of large trees. These patterns are inherited from the demographics (growth, mortality and recruitment) and size allometry of trees and tend to obscure other patterns, such as site differences among plots, that would be more informative for inferring ecological processes. Using data from 133 rain forest plots at nine sites for which site differences are known, we aimed to filter out these patterns in forest structural attributes to unveil a hidden pattern. Using a null model framework, we generated the anticipated pattern inherited from individual allometric patterns. We then evaluated deviations between the data (observations) and predictions of the null model. Ordination of the deviations revealed site differences that were not evident in the ordination of observations. These sites differences could be related to different histories of large-scale forest disturbance. By filtering out patterns inherited from individuals, our model analysis provides more information on ecological processes.
    Schlagwörter forest structure ; forest typology ; null model ; pattern and process ; rain forest ; correlation ; Evolution ; QH359-425 ; Ecology ; QH540-549.5
    Thema/Rubrik (Code) 006
    Sprache Englisch
    Erscheinungsdatum 2021-11-01T00:00:00Z
    Verlag Frontiers Media S.A.
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel: Opportunity costs of carbon sequestration in a forest concession in central Africa

    Ndjondo, Michel / Sylvie Gourlet-Fleury / Raphaël J Manlay / Nestor Laurier Engone Obiang / Alfred Ngomanda / Claudia Romero / Florian Claeys / Nicolas Picard

    Carbon balance and management. 2014 Dec., v. 9, no. 1

    2014  

    Abstract: BACKGROUND: A large proportion of the tropical rain forests of central Africa undergo periodic selective logging for timber harvesting. The REDD+ mechanism could promote less intensive logging if revenue from the additional carbon stored in the forest ... ...

    Abstract BACKGROUND: A large proportion of the tropical rain forests of central Africa undergo periodic selective logging for timber harvesting. The REDD+ mechanism could promote less intensive logging if revenue from the additional carbon stored in the forest compensates financially for the reduced timber yield. RESULTS: Carbon stocks, and timber yields, and their associated values, were predicted at the scale of a forest concession in Gabon over a project scenario of 40 yr with reduced logging intensity. Considering that the timber contribution margin (i.e. the selling price of timber minus its production costs) varies between 10 and US$40 m ⁻³, the minimum price of carbon that enables carbon revenues to compensate forgone timber benefits ranges between US$4.4 and US$25.9/tCO ₂ depending on the management scenario implemented. CONCLUSIONS: Where multiple suppliers of emission reductions compete in a REDD+ carbon market, tropical timber companies are likely to change their management practices only if very favourable conditions are met, namely if the timber contribution margin remains low enough and if alternative management practices and associated incentives are appropriately chosen.
    Schlagwörter business enterprises ; carbon ; carbon markets ; carbon sequestration ; carbon sinks ; income ; logging ; opportunity costs ; prices ; production costs ; tropical rain forests ; tropical wood ; Gabon
    Sprache Englisch
    Erscheinungsverlauf 2014-12
    Umfang p. 4.
    Erscheinungsort Springer International Publishing
    Dokumenttyp Artikel
    ISSN 1750-0680
    DOI 10.1186/s13021-014-0004-3
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel: How to improve allometric equations to estimate forest biomass stocks? Some hints from a central African forest

    Moundounga Mavouroulou, Quentin / Alfred Ngomanda / Nestor Laurier Engone Obiang / Judicaël Lebamba / Hugues Gomat / Géraud Sidoine Mankou / Joël Loumeto / Donald Midoko Iponga / Franck Kossi Ditsouga / Roland Zinga Koumba / Karl Henga Botsika Bobé / Nicaise Lépengué / Bertrand Mbatchi / Nicolas Picard

    Canadian journal of forest research =. 2014 Mar. 3, v. 44, no. 7

    2014  

    Abstract: Predicting the biomass of a forest stand using forest inventory data and allometric equations involves a chain of propagation of errors going from the sampling error to the tree measurement error. Using a biomass data set of 101 trees in a tropical rain ... ...

    Abstract Predicting the biomass of a forest stand using forest inventory data and allometric equations involves a chain of propagation of errors going from the sampling error to the tree measurement error. Using a biomass data set of 101 trees in a tropical rain forest in Gabon, we compared two sources of error: the error due to the choice of allometric equation, assessed using Bayesian model averaging, and the biomass measurement error when tree biomass is calculated from tree volume rather than directly weighed. Differences between allometric equations resulted in a between-equation error of about 0.245 for log-transformed biomass compared with a residual within-equation error of 0.297. Because the residual error is leveled off when randomly accumulating trees whereas the between-equation error is incompressible, the latter turned out to be a major source of error at the scale of a 1 ha plot. Measuring volumes rather than masses resulted in an error of 0.241 for log-transformed biomass and an average overestimation of the biomass by 19%. These results confirmed the choice of the allometric equation as a major source of error but unexpectedly showed that measuring volumes could seriously bias biomass estimates.
    Schlagwörter Bayesian theory ; allometry ; biomass ; data collection ; equations ; forest inventory ; forest stands ; prediction ; trees ; tropical rain forests ; aboveground woody biomass ; error propagation ; prediction error ; biomass measurement ; Gabon
    Sprache Englisch
    Erscheinungsverlauf 2014-0303
    Umfang p. 685-691.
    Erscheinungsort NRC Research Press
    Dokumenttyp Artikel
    ZDB-ID 1473096-0
    ISSN 1208-6037 ; 0045-5067
    ISSN (online) 1208-6037
    ISSN 0045-5067
    DOI 10.1139/cjfr-2013-0520
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  4. Artikel ; Online: Evenness mediates the global relationship between forest productivity and richness [Correction: Sept. 2023, 111(9), p. 2090]

    Hordijk, Iris / Maynard, Daniel S. / Hart, Simon P. / Lidong, Mo / Steege, Hans ter / Liang, Jingjing / de‐Miguel, Sergio / Nabuurs, Gert‐Jan / Reich, Peter B. / Abegg, Meinrad / Adou Yao, C. Yves / Alberti, Giorgio / Almeyda Zambrano, Angelica M. / Alvarado, Braulio V. / Esteban, Alvarez‐Davila / Alvarez‐Loayza, Patricia / Alves, Luciana F. / Ammer, Christian / Antón‐Fernández, Clara /
    Araujo‐Murakami, Alejandro / Arroyo, Luzmila / Avitabile, Valerio / Aymard C, Gerardo A. / Baker, Timothy / Bałazy, Radomir / Banki, Olaf / Barroso, Jorcely / Bastian, Meredith L. / Bastin, Jean‐Francois / Birigazzi, Luca / Birnbaum, Philippe / Bitariho, Robert / Boeckx, Pascal / Bongers, Frans / Bouriaud, Olivier / Brancalion, Pedro H. S. / Brandl, Susanne / Brienen, Roel / Broadbent, Eben N. / Bruelheide, Helge / Bussotti, Filippo / Cazzolla Gatti, Roberto / César, Ricardo G. / Cesljar, Goran / Chazdon, Robin / Chen, Han Y. H. / Chisholm, Chelsea / Cienciala, Emil / Clark, Connie J. / Clark, David B. / Colletta, Gabriel / Coomes, David / Cornejo Valverde, Fernando / Corral‐Rivas, Jose J. / Crim, Philip / Cumming, Jonathan / Dayanandan, Selvadurai / de Gasper, André L. / Decuyper, Mathieu / Derroire, Géraldine / DeVries, Ben / Djordjevic, Ilija / Iêda, Amaral / Dourdain, Aurélie / Nestor Laurier, Engone Obiang / Enquist, Brian / Eyre, Teresa / Fandohan, Adandé Belarmain / Fayle, Tom M. / Ferreira, Leandro V. / Feldpausch, Ted R. / Finér, Leena / Fischer, Markus / Fletcher, Christine / Frizzera, Lorenzo / Gamarra, Javier G. P. / Gianelle, Damiano / Glick, Henry B. / Harris, David / Hector, Andrew / Hemp, Andreas / Hengeveld, Geerten / Hérault, Bruno / Herbohn, John / Hillers, Annika / Honorio Coronado, Eurídice N. / Hui, Cang / Cho, Hyunkook / Ibanez, Thomas / Jung, Il Bin / Imai, Nobuo / Jagodziński, Andrzej M. / Jaroszewicz, Bogdan / Johanssen, Vivian / Joly, Carlos A. / Jucker, Tommaso / Karminov, Viktor / Kartawinata, Kuswata / Kearsley, Elizabeth / Kenfack, David / Kennard, Deborah / Kepfer‐Rojas, Sebastian / Keppel, Gunnar / Khan, Mohammed Latif / Killeen, Timothy / Kim, Hyun-Seok / Kitayama, Kanehiro / Köhl, Michael / Korjus, Henn / Kraxner, Florian / Laarmann, Diana / Lang, Mait / Lewis, Simon / Lu, Huicui / Lukina, Natalia / Maitner, Brian / Malhi, Y. / Marcon, Eric / Marimon, Beatriz Schwantes / Marimon‐Junior, Ben Hur / Marshall, Andrew Robert / Martin, Emanuel / Martynenko, Olga / Meave, Jorge A. / Melo‐Cruz, Omar / Mendoza, Casimiro / Merow, Cory / Miścicki, Stanisław / Mendoza, Abel Monteagudo / Moreno, Vanessa / Mukul, Sharif A. / Mundhenk, Philip / Nava‐Miranda, Maria G. / Neill, David / Neldner, Victor / Nevenic, Radovan / Ngugi, Michael / Niklaus, Pascal A. / Oleksyn, J. / Ontikov, Petr / Ortiz‐Malavasi, Edgar / Pan, Yude / Paquette, Alain / Parada‐Gutierrez, Alexander / Parfenova, Elena / Park, Minjee / Parren, Marc / Parthasarathy, Narayanaswamy / Peri, Pablo L. / Pfautsch, Sebastian / Phillips, Oliver L. / Picard, Nicolas / Piedade, Maria Teresa / Piotto, Daniel / Pitman, Nigel C. A. / Polo, Irina / Poorter, L. / Poulsen, Axel Dalberg / Poulsen, John R. / Pretzsch, Hans / Ramirez Arevalo, Freddy / Restrepo‐Correa, Zorayda / Rodeghiero, Mirco / Rolim, Samir / Roopsind, Anand / Rovero, Francesco / Rutishauser, Ervan / Saikia, Purabi / Salas‐Eljatib, Christian / Schall, Peter / Schepaschenko, Dmitry / Scherer‐Lorenzen, Michael / Schmid, Bernhard / Schöngart, Jochen / Searle, Eric B. / Šebeň, Vladimír / Serra‐Diaz, Josep M. / Sheil, Douglas / Shvidenko, Anatoly / Silva‐Espejo, Javier / Silveira, Marcos / Singh, James / Sist, Plinio / Slik, Ferry / Sonké, Bonaventure / Souza, Alexandre F. / Stereńczak, Krzysztof / Svenning, Jens‐Christian / Svoboda, Miroslav / Swanepoel, Ben / Targhetta, Natalia / Tchebakova, Nadja / Thomas, Raquel / Tikhonova, Elena / Umunay, Peter / Usoltsev, Vladimir / Valencia, Renato / Valladares, Fernando / van der Plas, Fons / Tran, Do Van / Van Nuland, Michael E. / Vásquez, Rodolfo / Verbeeck, Hans / Viana, Helder / Vibrans, Alexander C. / Vieira, Simone / Gadow, Klaus von / Wang, Hua‐Feng / Watson, James / Werner, Gijsbert D. A. / Wiser, Susan K. / Wittmann, Florian / Wortel, Verginia / Zagt, Roderick / Zawila‐Niedzwiecki, Tomasz / Zhang, Chunyu / Zhao, Xiuhai / Zhou, Mo / Zhu, Zhi‐Xin / Zo‐Bi, Irie Casimir / Crowther, Thomas W.

    Journal of Ecology. 2023 June, v. 111, no. 6, p. 1308-1326

    2023  , Seite(n) 1308–1326

    Abstract: 1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less ... ...

    Abstract 1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity–ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions.
    Schlagwörter biomass production ; data collection ; ecosystem management ; ecosystems ; forests ; net primary productivity ; rare species ; species richness ; trees
    Sprache Englisch
    Erscheinungsverlauf 2023-06
    Umfang p. 1308-1326
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 3023-5
    ISSN 0022-0477
    ISSN 0022-0477
    DOI 10.1111/1365-2745.14098
    Datenquelle NAL Katalog (AGRICOLA)

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  5. Artikel ; Online: Evenness mediates the global relationship between forest productivity and richness

    Hordijk, Iris / Maynard, Daniel S. / Hart, Simon P. / Lidong, Mo / ter Steege, Hans / Liang, Jingjing / de-Miguel, Sergio / Nabuurs, Gert Jan / Reich, Peter B. / Abegg, Meinrad / Adou Yao, Yves / Alberti, Giorgio / Almeyda Zambrano, Angelica M. / Alvarado, Braulio V. / Esteban, Alvarez Davila / Alvarez-Loayza, Patricia / Alves, Luciana F. / Ammer, Christian / Antón-Fernández, Clara /
    Araujo-Murakami, Alejandro / Arroyo, Luzmila / Avitabile, Valerio / Aymard C, Gerardo A. / Baker, Timothy / Bałazy, Radomir / Banki, Olaf / Barroso, Jorcely / Bastian, Meredith L. / Bastin, Jean Francois / Birigazzi, Luca / Birnbaum, Philippe / Bitariho, Robert / Boeckx, Pascal / Bongers, Frans / Bouriaud, Olivier / Brancalion, Pedro H.S. / Brandl, Susanne / Brienen, Roel / Broadbent, Eben N. / Bruelheide, Helge / Bussotti, Filippo / Cazzolla Gatti, Roberto / César, Ricardo G. / Cesljar, Goran / Chazdon, Robin / Chen, Han Y.H. / Chisholm, Chelsea / Cienciala, Emil / Clark, Connie J. / Clark, David B. / Colletta, Gabriel / Coomes, David / Cornejo Valverde, Fernando / Corral-Rivas, Jose J. / Crim, Philip / Cumming, Jonathan / Dayanandan, Selvadurai / de Gasper, André L. / Decuyper, Mathieu / Derroire, Géraldine / DeVries, Ben / Djordjevic, Ilija / Iêda, Amaral / Dourdain, Aurélie / Nestor Laurier, Engone Obiang / Enquist, Brian / Eyre, Teresa / Fandohan, Adandé Belarmain / Fayle, Tom M. / Ferreira, Leandro V. / Feldpausch, Ted R. / Finér, Leena / Fischer, Markus / Fletcher, Christine / Frizzera, Lorenzo / Gamarra, Javier G.P. / Gianelle, Damiano / Glick, Henry B. / Harris, David / Hector, Andrew / Hemp, Andreas / Hengeveld, Geerten / Hérault, Bruno / Herbohn, John / Hillers, Annika / Honorio Coronado, Eurídice N. / Hui, Cang / Cho, Hyunkook / Ibanez, Thomas / Bin Jung, Il / Imai, Nobuo / Jagodzinski, Andrzej M. / Jaroszewicz, Bogdan / Johanssen, Vivian / Joly, Carlos A. / Jucker, Tommaso / Karminov, Viktor / Kartawinata, Kuswata / Kearsley, Elizabeth / Kenfack, David / Kennard, Deborah / Kepfer-Rojas, Sebastian / Keppel, Gunnar / Khan, Mohammed Latif / Killeen, Timothy / Kim, Hyun Seok / Kitayama, Kanehiro / Köhl, Michael / Korjus, Henn / Kraxner, Florian / Laarmann, Diana / Lang, Mait / Lewis, Simon / Lu, Huicui / Lukina, Natalia / Maitner, Brian / Malhi, Yadvinder / Marcon, Eric / Marimon, Beatriz Schwantes / Marimon-Junior, Ben Hur / Marshall, Andrew Robert / Martin, Emanuel / Martynenko, Olga / Meave, Jorge A. / Melo-Cruz, Omar / Mendoza, Casimiro / Merow, Cory / Stanislaw, Miscicki / Mendoza, Abel Monteagudo / Moreno, Vanessa / Mukul, Sharif A. / Mundhenk, Philip / Nava-Miranda, Maria G. / Neill, David / Neldner, Victor / Nevenic, Radovan / Ngugi, Michael / Niklaus, Pascal A. / Oleksyn, Jacek / Ontikov, Petr / Ortiz-Malavasi, Edgar / Pan, Yude / Paquette, Alain / Parada-Gutierrez, Alexander / Parfenova, Elena / Park, Minjee / Parren, Marc / Parthasarathy, Narayanaswamy / Peri, Pablo L. / Pfautsch, Sebastian / Phillips, Oliver L. / Picard, Nicolas / Piedade, Maria Teresa / Piotto, Daniel / Pitman, Nigel C.A. / Polo, Irina / Poorter, Lourens / Poulsen, Axel Dalberg / Poulsen, John R. / Pretzsch, Hans / Ramirez Arevalo, Freddy / Restrepo-Correa, Zorayda / Rodeghiero, Mirco / Rolim, Samir / Roopsind, Anand / Rovero, Francesco / Rutishauser, Ervan / Saikia, Purabi / Salas-Eljatib, Christian / Schall, Peter / Schepaschenko, Dmitry / Scherer-Lorenzen, Michael / Schmid, Bernhard / Schöngart, Jochen / Searle, Eric B. / Šebeň, Vladimír / Serra-Diaz, Josep M. / Sheil, Douglas / Shvidenko, Anatoly / Silva-Espejo, Javier / Silveira, Marcos / Singh, James / Sist, Plinio / Slik, Ferry / Sonké, Bonaventure / Souza, Alexandre F. / Stereńczak, Krzysztof / Svenning, Jens Christian / Svoboda, Miroslav / Swanepoel, Ben / Targhetta, Natalia / Tchebakova, Nadja / Thomas, Raquel / Tikhonova, Elena / Umunay, Peter / Usoltsev, Vladimir / Valencia, Renato / Valladares, Fernando / van der Plas, Fons / Tran, Do Van / Van Nuland, Michael E. / Vasquez Martinez, Rodolfo / Verbeeck, Hans / Viana, Helder / Vibrans, Alexander C. / Vieira, Simone / von Gadow, Klaus / Wang, Hua Feng / Watson, James / Werner, Gijsbert D.A. / Wiser, Susan K. / Wittmann, Florian / Wortel, Verginia / Zagt, Roderick / Zawila-Niedzwiecki, Tomasz / Zhang, Chunyu / Zhao, Xiuhai / Zhou, Mo / Zhu, Zhi Xin / Zo-Bi, Irie Casimir / Crowther, Thomas W.

    Journal of Ecology

    2023  Band 111, Heft 6

    Abstract: 1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less ... ...

    Abstract 1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. ...
    Schlagwörter diversity ; ecosystem function and services ; evenness ; forests ; global ; productivity ; species richness
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsland nl
    Dokumenttyp Artikel ; Online
    ZDB-ID 3023-5
    ISSN 0022-0477
    ISSN 0022-0477
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

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  6. Artikel: How to improve allometric equations to estimate forest biomass stocks? Some hints from a central African forest

    Moundounga Mavouroulou, Quentin / Alfred Ngomanda / Nestor Laurier Engone Obiang / Judicaël Lebamba / Hugues Gomat / Géraud Sidoine Mankou / Joël Loumeto / Donald Midoko Iponga / Franck Kossi Ditsouga / Roland Zinga Koumba / Karl Henga Botsika Bobé / Nicaise Lépengué / Bertrand Mbatchi / Nicolas Picard

    Canadian journal of forest research =

    Band v. 44,, Heft no. 7

    Abstract: Predicting the biomass of a forest stand using forest inventory data and allometric equations involves a chain of propagation of errors going from the sampling error to the tree measurement error. Using a biomass data set of 101 trees in a tropical rain ... ...

    Abstract Predicting the biomass of a forest stand using forest inventory data and allometric equations involves a chain of propagation of errors going from the sampling error to the tree measurement error. Using a biomass data set of 101 trees in a tropical rain forest in Gabon, we compared two sources of error: the error due to the choice of allometric equation, assessed using Bayesian model averaging, and the biomass measurement error when tree biomass is calculated from tree volume rather than directly weighed. Differences between allometric equations resulted in a between-equation error of about 0.245 for log-transformed biomass compared with a residual within-equation error of 0.297. Because the residual error is leveled off when randomly accumulating trees whereas the between-equation error is incompressible, the latter turned out to be a major source of error at the scale of a 1 ha plot. Measuring volumes rather than masses resulted in an error of 0.241 for log-transformed biomass and an average overestimation of the biomass by 19%. These results confirmed the choice of the allometric equation as a major source of error but unexpectedly showed that measuring volumes could seriously bias biomass estimates.
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 1208-6037
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

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