{"paper_id":"410bc5c6-f643-4083-bc7c-179954ad77b6","body_text":"Allometric Equation for Aboveground Biomass Estimation for Selected Trees Shrubs in Gesha - Sayilem Moist Afromontane Forest. | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Help Center Sign In Submit a Preprint Cite Share Download PDF Research Allometric Equation for Aboveground Biomass Estimation for Selected Trees Shrubs in Gesha - Sayilem Moist Afromontane Forest. Admassu Addi Merti, Teshome soromessa Soromessa, Tura Bareke Kefle This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-210985/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Background: Allometric equations which are regressions linking the biomass to some independent variables that are used to estimate tree components from the forest. The generic equation developed by many authors may not adequately reveal the tree biomass in a specific region in tropics including in Ethiopia. Therefore, the use of species specific allometric equations is important to achieve higher levels of accuracy because trees of different species may differ in size and biomass. The objective of the study was to develop species-specific allometric equations for Apodytes dimidiata , Ilex mitis , Sapium ellipticum and shrubs ( Galiniera saxifraga and Vernonia auriculifera ) for estimating the aboveground biomass (AGB). Non-destructive sampling method was used for the measurement of tree biomass, accordingly the trees and shrubs whose Diameter at Breast Height (DBH) is ≥ 5 cm were sampled. For trees serial measurements of the height and diameter of trunk were done at 2 m intervals. For the determination of biomass of shrubs destructively sampled. Four branches were trimmed from tree and the trimmed branches were separated into leaves and wood and oven dried at 105 0 C and recorded to estimate the biomass of untrimmed small branches. Nested model was used and the best fit model was selected based on higher Adjusted R 2 , lower residual standard error and Akaike information criterion. Results: All the necessary biomass calculations were done, and biomass equations were developed for each species. The regression equations relate AGB with DBH, height (H), and density (ρ) were computed and the models were tested for accuracy based on observed data. The best model was selected based higher adj R 2 and lower residual standard error and Akaike information criterion than rejected models. The relations for all selected models are significant (p<0.000), which showed strong correlation AGB with selected dendrometric variables. Accordingly, the AGB was strongly correlated with DBH and was not significantly correlated with wood density and height individually in Ilex mitis . In combination, AGB was strongly correlated with DBH, height and wood density; are better for carbon assessment than general equations. Conclusions: The specific allometeric equation developed for the Gesha-Sayilem Afromontane Forest which can be used in similar moist forests in Ethiopia for the implementation of Reduced Emission from Deforestation and Degradation (REDD + ) activities to benefit the local communities from carbon trade. Forestry Allometeric equation Biomass Afromontane forest Gesha and Sayilem Figures Figure 1 Figure 2 Figure 3 Figure 4 Full Text Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the latest manuscript can be downloaded and accessed as a PDF. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {\"props\":{\"pageProps\":{\"initialData\":{\"identity\":\"rs-210985\",\"acceptedTermsAndConditions\":true,\"allowDirectSubmit\":true,\"archivedVersions\":[],\"articleType\":\"Research\",\"associatedPublications\":[],\"authors\":[{\"id\":10661153,\"identity\":\"4eae968a-a2a3-4045-845b-b51657a7c20b\",\"order_by\":0,\"name\":\"Admassu Addi Merti\",\"email\":\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA40lEQVRIiWNgGAWjYFCCBCh9ILHxAZDi4SNFS7MBSAsbCVoS2CRANEEt/O3ZiR9//Dksz3c8ua3ya46dDBsD88NHN/BokTjzdrM0b9thw5lnHrbdlt2WDHQYm7FxDj5rbuRukGZsOMy44UZi223JbcxALTxs0vi0yN/I3fwT6DB7kJZiyW31hLUY3MjdJsHDdjgRpIXx47bDhLUYnnm7zZq3LT0Z6JdmacZtx3nYmAn4Re547uabP/5Y2/YdT3/48ee2ant+9uaHj/F6Hxkw84BJYpWDAOMPUlSPglEwCkbBiAEATxFRKrVhKi4AAAAASUVORK5CYII=\",\"orcid\":\"\",\"institution\":\"Oromia Agricultural research Institute\",\"correspondingAuthor\":true,\"submittingAuthor\":false,\"prefix\":\"\",\"firstName\":\"Admassu\",\"middleName\":\"Addi\",\"lastName\":\"Merti\",\"suffix\":\"\"},{\"id\":10661154,\"identity\":\"004f0921-2861-41e7-acd2-f59dd7fcf7ad\",\"order_by\":1,\"name\":\"Teshome soromessa Soromessa\",\"email\":\"\",\"orcid\":\"\",\"institution\":\"Addis Ababa University\",\"correspondingAuthor\":false,\"submittingAuthor\":false,\"prefix\":\"\",\"firstName\":\"Teshome\",\"middleName\":\"soromessa\",\"lastName\":\"Soromessa\",\"suffix\":\"\"},{\"id\":10661155,\"identity\":\"72e816f1-0c84-4e13-8707-0ef0428157f1\",\"order_by\":2,\"name\":\"Tura Bareke Kefle\",\"email\":\"\",\"orcid\":\"\",\"institution\":\"Oromia agricultural research institute\",\"correspondingAuthor\":false,\"submittingAuthor\":false,\"prefix\":\"\",\"firstName\":\"Tura\",\"middleName\":\"Bareke\",\"lastName\":\"Kefle\",\"suffix\":\"\"}],\"badges\":[],\"createdAt\":\"2021-02-05 17:53:19\",\"currentVersionCode\":1,\"declarations\":\"\",\"doi\":\"10.21203/rs.3.rs-210985/v1\",\"doiUrl\":\"https://doi.org/10.21203/rs.3.rs-210985/v1\",\"draftVersion\":[],\"editorialEvents\":[],\"editorialNote\":\"\",\"failedWorkflow\":false,\"files\":[{\"id\":6119380,\"identity\":\"60c08820-bcf0-454f-8c25-c16d2090b451\",\"added_by\":\"auto\",\"created_at\":\"2021-02-19 00:48:23\",\"extension\":\"jpeg\",\"order_by\":1,\"title\":\"Figure 1\",\"display\":\"\",\"copyAsset\":false,\"role\":\"figure\",\"size\":355876,\"visible\":true,\"origin\":\"\",\"legend\":\"Map of Ethiopia, Oromia and SNNP Region, Kaffa zone, Gesha and Sayilem districts \\nSource: (Admassu et al. 2020)\\nNote: The designations employed and the presentation of the material on this map\\ndo not imply the expression of any opinion whatsoever on the part of Research Square concerning\\nthe legal status of any country, territory, city or area or of its authorities, \\nor concerning the delimitation of its frontiers or boundaries. This map has been provided by the authors.\",\"description\":\"\",\"filename\":\"floatimage1.jpeg\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1/042904a767ab6065b1c22993.jpeg\"},{\"id\":6119040,\"identity\":\"13aa75ea-3ee0-4099-8dbd-518d9d5dd805\",\"added_by\":\"auto\",\"created_at\":\"2021-02-19 00:45:23\",\"extension\":\"png\",\"order_by\":2,\"title\":\"Figure 2\",\"display\":\"\",\"copyAsset\":false,\"role\":\"figure\",\"size\":47670,\"visible\":true,\"origin\":\"\",\"legend\":\"Determination of total fresh biomass. (A) Separation and measurement of trimmed and untrimmed biomass, (B) numbering of the sections and branches measured on a trimmed tree.\\nSource: Picard, et al. (2012).\\n\",\"description\":\"\",\"filename\":\"floatimage2.png\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1/e6c6b57a69daad863ccef936.png\"},{\"id\":6118777,\"identity\":\"71ea696c-e7eb-4fd8-a6c7-f3f8a56be052\",\"added_by\":\"auto\",\"created_at\":\"2021-02-19 00:42:23\",\"extension\":\"png\",\"order_by\":3,\"title\":\"Figure 3\",\"display\":\"\",\"copyAsset\":false,\"role\":\"figure\",\"size\":13156,\"visible\":true,\"origin\":\"\",\"legend\":\"Measuring wood volume by water displacement\",\"description\":\"\",\"filename\":\"floatimage3.png\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1/9b33069a39df875781209c11.png\"},{\"id\":6119038,\"identity\":\"b3ded1e2-3047-48c3-8141-9c1cfa3bebea\",\"added_by\":\"auto\",\"created_at\":\"2021-02-19 00:45:23\",\"extension\":\"png\",\"order_by\":4,\"title\":\"Figure 4\",\"display\":\"\",\"copyAsset\":false,\"role\":\"figure\",\"size\":24185,\"visible\":true,\"origin\":\"\",\"legend\":\"Aboveground biomass partitioning for the main sampled tree and shrub species \",\"description\":\"\",\"filename\":\"4.png\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1/20cc7deb165cd7e30511b0f1.png\"},{\"id\":13590954,\"identity\":\"2b1d3a64-b67a-4978-bd4a-3301e15b536b\",\"added_by\":\"auto\",\"created_at\":\"2021-09-17 05:06:54\",\"extension\":\"pdf\",\"order_by\":1,\"title\":\"\",\"display\":\"\",\"copyAsset\":false,\"role\":\"manuscript-pdf\",\"size\":837017,\"visible\":true,\"origin\":\"\",\"legend\":\"\",\"description\":\"\",\"filename\":\"Manscuriptallometeryforpublication4.pdf\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1_covered.pdf\"},{\"id\":6119744,\"identity\":\"81f3153b-2eca-47ea-b07c-7a1e301f2208\",\"added_by\":\"auto\",\"created_at\":\"2021-02-19 00:51:28\",\"extension\":\"pdf\",\"order_by\":1,\"title\":\"\",\"display\":\"\",\"copyAsset\":false,\"role\":\"manuscript-pdf\",\"size\":1510894,\"visible\":true,\"origin\":\"\",\"legend\":\"\",\"description\":\"\",\"filename\":\"Manscuriptallometeryforpublication4.pdf\",\"url\":\"https://assets-eu.researchsquare.com/files/rs-210985/v1_stamped.pdf\"}],\"financialInterests\":\"\",\"formattedTitle\":\"\\u003cp\\u003eAllometric Equation for Aboveground Biomass Estimation for Selected Trees Shrubs in Gesha - Sayilem Moist Afromontane Forest.\\u003c/p\\u003e\",\"fulltext\":[{\"header\":\"Full Text\",\"content\":\"Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the latest manuscript can be downloaded and \\u003ca href='/article/rs-210985/latest.pdf' target='_blank'\\u003e accessed as a PDF.\\u003c/a\\u003e\"}],\"fulltextSource\":\"\",\"fullText\":\"\",\"funders\":[],\"hasAdminPriorityOnWorkflow\":false,\"hasManuscriptDocX\":false,\"hasOptedInToPreprint\":true,\"hasPassedJournalQc\":\"\",\"hasAnyPriority\":false,\"hideJournal\":true,\"highlight\":\"\",\"institution\":\"\",\"isAcceptedByJournal\":false,\"isAuthorSuppliedPdf\":true,\"isDeskRejected\":\"\",\"isHiddenFromSearch\":false,\"isInQc\":false,\"isInWorkflow\":false,\"isPdf\":false,\"isPdfUpToDate\":true,\"isWithdrawnOrRetracted\":false,\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"researchsquare\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":true,\"externalIdentity\":\"\",\"sideBox\":\"\",\"snPcode\":\"\",\"submissionUrl\":\"/submission\",\"title\":\"Research Square\",\"twitterHandle\":\"researchsquare\",\"acdcEnabled\":true,\"dfaEnabled\":false,\"editorialSystem\":\"\",\"reportingPortfolio\":\"\",\"inReviewEnabled\":false,\"inReviewRevisionsEnabled\":true},\"keywords\":\"Allometeric equation, Biomass, Afromontane forest, Gesha and Sayilem\",\"lastPublishedDoi\":\"10.21203/rs.3.rs-210985/v1\",\"lastPublishedDoiUrl\":\"https://doi.org/10.21203/rs.3.rs-210985/v1\",\"license\":{\"name\":\"CC BY 4.0\",\"url\":\"https://creativecommons.org/licenses/by/4.0/\"},\"manuscriptAbstract\":\"\\u003cp\\u003e\\u003cstrong\\u003eBackground: \\u003c/strong\\u003eAllometric equations which are regressions linking the biomass to some independent variables that are used to estimate tree components from the forest. The generic equation developed by many authors may not adequately reveal the tree biomass in a specific region in tropics including in Ethiopia. Therefore, the use of species specific allometric equations is important to achieve higher levels of accuracy because trees of different species may differ in size and biomass. The objective of the study was to develop species-specific allometric equations for \\u003cem\\u003eApodytes dimidiata\\u003c/em\\u003e, \\u003cem\\u003eIlex mitis\\u003c/em\\u003e, \\u003cem\\u003eSapium ellipticum\\u003c/em\\u003e and shrubs (\\u003cem\\u003eGaliniera saxifraga\\u003c/em\\u003e and \\u003cem\\u003eVernonia auriculifera\\u003c/em\\u003e) for estimating the aboveground biomass (AGB). Non-destructive sampling method was used for the measurement of tree biomass, accordingly the trees and shrubs whose Diameter at Breast Height (DBH) is ≥ 5 cm were sampled. For trees serial measurements of the height and diameter of trunk were done at 2 m intervals. For the determination of biomass of shrubs destructively sampled. Four branches were trimmed from tree and the trimmed branches were separated into leaves and wood and oven dried at 105\\u003csup\\u003e0\\u003c/sup\\u003eC and recorded to estimate the biomass of untrimmed small branches. Nested model was used and the best fit model was selected based on higher Adjusted R\\u003csup\\u003e2\\u003c/sup\\u003e, lower residual standard error and Akaike information criterion. \\u003c/p\\u003e\\u003cp\\u003e\\u003cstrong\\u003eResults:\\u003c/strong\\u003e All the necessary biomass calculations were done, and biomass equations were developed for each species. The regression equations relate AGB with DBH, height (H), and density (ρ) were computed and the models were tested for accuracy based on observed data. The best model was selected based higher adj R\\u003csup\\u003e2\\u003c/sup\\u003e and lower residual standard error and Akaike information criterion than rejected models. The relations for all selected models are significant (p\\u0026lt;0.000), which showed strong correlation AGB with selected dendrometric variables. Accordingly, the AGB was strongly correlated with DBH and was not significantly correlated with wood density and height individually in \\u003cem\\u003eIlex mitis\\u003c/em\\u003e. In combination, AGB was strongly correlated with DBH, height and wood density; are better for carbon assessment than general equations.\\u003c/p\\u003e\\u003cp\\u003e\\u003cstrong\\u003eConclusions:\\u003c/strong\\u003e \\u0026nbsp;The specific allometeric equation developed for the Gesha-Sayilem Afromontane Forest which can be used in similar moist forests in Ethiopia for the implementation of Reduced Emission from Deforestation and Degradation (REDD\\u003csup\\u003e+\\u003c/sup\\u003e)\\u003csup\\u003e \\u003c/sup\\u003eactivities to benefit the local communities from carbon trade.\\u0026nbsp;\\u0026nbsp;\\u003c/p\\u003e\",\"manuscriptTitle\":\"Allometric Equation for Aboveground Biomass Estimation for Selected Trees Shrubs in Gesha - Sayilem Moist Afromontane Forest.\",\"msid\":\"\",\"msnumber\":\"\",\"nonDraftVersions\":[{\"code\":1,\"date\":\"2021-02-19 00:42:22\",\"doi\":\"10.21203/rs.3.rs-210985/v1\",\"editorialEvents\":[{\"type\":\"communityComments\",\"content\":0}],\"status\":\"published\",\"journal\":{\"display\":true,\"email\":\"info@researchsquare.com\",\"identity\":\"researchsquare\",\"isNatureJournal\":false,\"hasQc\":true,\"allowDirectSubmit\":true,\"externalIdentity\":\"\",\"sideBox\":\"\",\"snPcode\":\"\",\"submissionUrl\":\"/submission\",\"title\":\"Research Square\",\"twitterHandle\":\"researchsquare\",\"acdcEnabled\":true,\"dfaEnabled\":false,\"editorialSystem\":\"\",\"reportingPortfolio\":\"\",\"inReviewEnabled\":false,\"inReviewRevisionsEnabled\":true}}],\"origin\":\"\",\"ownerIdentity\":\"f568ad30-d6a2-4be3-bf6d-d1d30c4a2d9e\",\"owner\":[],\"postedDate\":\"February 19th, 2021\",\"published\":true,\"recentEditorialEvents\":[],\"rejectedJournal\":[],\"revision\":\"\",\"amendment\":\"\",\"status\":\"posted\",\"subjectAreas\":[{\"id\":2494640,\"name\":\"Forestry\"}],\"tags\":[],\"updatedAt\":\"2021-02-19T00:42:23+00:00\",\"versionOfRecord\":[],\"versionCreatedAt\":\"2021-02-19 00:42:22\",\"video\":\"\",\"vorDoi\":\"\",\"vorDoiUrl\":\"\",\"workflowStages\":[]},\"version\":\"v1\",\"identity\":\"rs-210985\",\"journalConfig\":\"researchsquare\"},\"__N_SSP\":true},\"page\":\"/article/[identity]/[[...version]]\",\"query\":{\"redirect\":\"/article/rs-210985\",\"identity\":\"rs-210985\",\"version\":[\"v1\"]},\"buildId\":\"GqpaHPwrfC8PjnIFayRh5\",\"isFallback\":false,\"isExperimentalCompile\":false,\"dynamicIds\":[84888],\"gssp\":true,\"scriptLoader\":[]}","source_license":"CC-BY-4.0","license_restricted":false}