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Evolution history dominantly regulates fine root lifespan in tree species across the world

Forest Ecosystems 2024年第4期11卷 516-525页

作者： Xingzhao Huang Zhouying Lu Fangbing Li Yang Deng Fangfang Wan Quancheng Wang fousseni folega Jinsong Wang Zijian Guo Anhui Province Key Laboratory of Forest Resources and Silviculture Anhui Agricultural UniversityHefei 230036China State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Laboratory of Botany and Plant Ecology(LBEV) University of LomeTogo01PoBox 1515LomeTogo State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing 100083China School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China

Understanding the drivers of variations in fine root lifespan is key to informing nutrient cycling and productivity in terrestrial ***,the general patterns and determinants of forest fine root lifespan at the global scale are still *** compiled a dataset of 421 fine root lifespan observations from 76 tree species globally to assess phylogenetic signals among species,explored relationships between fine root lifespan and biotic and abiotic factors,and quantified the relative importance of phylogeny,root system structure and functions,climatic and edaphic factors in driving global fine root lifespan ***,fine root lifespan showed a clear phylogenetic signal,with gymnosperms having a longer fine root lifespan than *** root lifespan was longer for evergreens than deciduous ***(ECM)plants had an extended fine root lifespan than arbuscular mycorrhizal(AM)*** different climatic zones,fine root lifespan was the longest in the boreal zone,while it did not vary between the temperate and tropical *** root lifespan increased with soil depth and root ***,the analysis of relative importance indicated that phylogeny was the strongest driver influencing the variation in forest fine root lifespan,followed by soil clay content,root order,mean annual temperature,and soil depth,while other environmental factors and root traits exerted weaker *** results suggest that the global pattern of fine root lifespan in forests is shaped by the interplay of phylogeny,root traits and environmental *** findings necessitate accurate representations of tree evolutionary history in earth system models to predict fine root longevity and its responses to global changes.

关键词： Fine root lifespan Trees Phylogeny Root order Soil property Climatic factors

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Land use patterns and tree species diversity in the Volta Geological Unit, Togo

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Journal of Mountain Science 2019年第8期16卷 1869-1882页

作者： folega fousseni ATAKPAMA Wouyo WALA Kperkouma MUKETE Beckline SHOZO Shibata AKIRA Osawa ZHAO Xiu-hai AKPAGANA Koffi Geomatic and Ecosystems Modeling/Laboratory of botany and Plant Ecology Faculty of SciencesUniversity of LomeLome01BP1515Togo Key Laboratory for Forest Resources&Ecosystem Processes Beijing Forestry UniversityBeijing 100083China Graduate School of Global Environmental Studies Kyoto UniversityKyoto 606-8501Japan Department of Forest Management Beijing Forestry UniversityBeijing 100083China

The application of remote sensing in understanding tree species structural diversity and land use patterns relationship is imperative for reforestation and biodiversity conservation efforts. This study assesses land use patterns and tree species structural diversity in previously reforested hilly sandstone regions of northern Togo. The physical height, and diameter at breast height(DBH) more than 5 cm of all tree species in each given plot were measured in summer 2017. A total of 75 plots of 900 m^2 installed along the toposequence were recorded. In addition, a semi-supervised classification of Landsat 8 images in January of 2018, was also used to classify the land use patterns. 36 tree species and 19 families were recorded for the entire study area. Meanwhile, 19 tree species and 15 families were recorded for the previously afforested zones. The most abundant species included the Sterculiaceae, Zygophyllaceae, Meliaceae, and Mimosaceae. The trees stand structure represented 8.61 ± 0.57 m, 11.28 ± 1.76 cm, and 0.018 ± 0.009 m^2 per hectare for height, diameter and basal area respectively. Major land use patterns were tree and shrub savannahs, parklands and croplands which represented over 60% of the landscape. It is necessary to examine the regeneration and vegetative multiplication potentials of the most frequent and abundant tree species for any eventual future afforestation programs in these hilly sandstone regions of northern Togo.

关键词： Ecological diversity Land use Ecological restoration Forest degradation Togo

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Satellite monitoring of land-use and land-cover changes in northern Togo protected areas

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Journal of Forestry Research 2014年第2期25卷 385-392页

作者： fousseni folega Chun-yu Zhang Xiu-hai Zhao Kperkouma Wala Komlan Batawila Hua-guo Huang Marra Dourma Koffi Akpagana The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Université de Lomé Laboratoire de botanique et écologie végétaleFaculté des sciences

Remote-sensing data for protected areas in northern Togo, obtained in three different years （2007, 2000, and 1987）, were used to assess and map changes in land cover and land use for this drought prone zone. The normalized difference vegetation index （NDVI） was applied to the images to map changes in vegetation. An unsupervised classification, followed by classes recoding, filtering, identifications, area computing and post-classification process were applied to the composite of the three years of NDVI images. Maximum likelihood classification was applied to the 2007 image （ETM＋2007） using a supervised classification process. Seven vegetation classes were defined from training data sets. The seven classes included the following biomes： riparian forest, dry forest, flooded vegetation, wooded savanna, fallows, parkland, and water. For these classes, the overall accuracy and the overall kappa statistic for the classi- fied map were 72.5% and 0.67, respectively. Data analyses indicated a great change in land resources; especially between 1987 and 2000 proba- bly due to the impact of democratization process social, economic, and political disorder from 1990. Wide-scale loss of vegetation occurred during this period. However, areas of vegetation clearing and regrowth were more visible between 2000 and 2007. The main source of confusion in the contingency matrix was due to heterogeneity within certain classes. It could also be due to spectral homogeneity among the classes. This research provides a baseline for future ecological landscape research and for the next management program in the area.

关键词： land change NDVI land cover protected areas Northern Togo

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Woody vegetation of protected areas in northern Togo. Cases of Barkoissi, Galangashi and Oti-Keran: ecological and structure analyses of plant communities

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Forestry Studies in China 2011年第1期13卷 23-35页

作者： folega fousseni Wala KPERKOUM ZHANG Chun-yu ZHAO Xiu-hai Akpagana KOFFI Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing 100083 P. R. China Universite de Lome Laboratoire de Botanique et Eeologie Vegetale Faculte des Sciences Lome BP 1515 Togo

The 170 samples obtained from ligneous investigation in Barkoissi,Galangashi and Oti-Keran protected areas（northern Togo） were subjected to floristic processing and several multivariate analyses in order to study plant diversity,life form and chorological type distribution and to classify and identify the main plant communities with their demographic ***,the overall life form and phytogeographical type frequencies were calculated to analyze and show the distribution of the 68 plants species in this *** plant communities were determined by using the hierarchical clustering with wards *** plant communities found were identified by the technique of indicator value（IndVal）.For each grouping diversity index such as specific richness,Shannon index and Pielou＇s evenness was set *** canonical correspondence analysis（CCA） was also used to relate the impact of environment factors and the distribution of *** the variance analysis（ANOVA） associated to post-hoc test was used to compare the similarity between the *** these 170 samples,12 plant communities were discriminated,three for the reserve of Barkoissi,three for the reserve of Galangashi and six for the reserve of *** samples were well distributed in the factorial plan form by axe 1 and 3 of *** plant communities were distributed along the moisture gradient in the *** Sudano-Zambesian species followed by Sudanian species were the phytogeographical types most found in these *** microphanerophytes were the most represented life *** structural parameters such as diameter and height means,the basal area and the densities determined and submitted to post-hoc test show some important similarity between some groups *** overall,the vegetation condition of the three protected areas is somehow disturbed while most of the plant communities are *** preliminary ecological data obtained are essential and fundamental for the management an

关键词： diversity phytogeography phytosociology CCA ANOVA Barkoissi Galangashi Oti-Keran

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Assessment and impact of anthropogenic disturbances in protected areas of northern Togo

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Forestry Studies in China 2012年第3期14卷 216-223页

作者： folega fousseni Dourma MARRA Kperkouma WALA Komlan BATAWILA ZHANG Chun-yu ZHAO Xiu-hai Koffi AKPAGANA Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing 100083 E R. China Universite de Loree Laboratoire de Botanique et d'Ecologie Vegetale Faculte des Sciences Lome BP 1515 Togo

These days, human activities in the savanna and the remaining dry and riparian forests of the Sudanian ecoregions continue to have their impact. These anthropogenic practices are still the main cause of disturbances in these areas. In order to investigate and assess the importance of these disturbances, caused by people bordering on protected areas and to determine the relation between these activities and the environment in which they are carried out, 220 samples were selected in the three main protected areas of northern Togo. The investigation was mainly qualitative, considering the floristic sampling of this drought area; any anthropogenic activities observed were recorded. A simple investigative questionnaire about the activities of rural people in the reserved areas was distributed to individuals encountered in the study area. Each sample in the investigation ended with a site description of its ecologi- cal characterization, i.e., soil features, topography, fauna footprints, dominant plant species and GPS position; we also took photo- graphs of the site. Data processing was entirely based on descriptive statistics and a factor analysis. The results show that eight kinds of human activities, i.e., the use of pastures, tree cutting, bush fires, charcoal production, harvesting of plant material, fanning, honey harvesting and hunting, were noted to be serious disturbances to the integrity of the ecosystems. Among these disturbances, three are recurrent in all the sampled areas of which the use of pastures accounts for 31.88%, tree cutting for 30.35% and bush fires for 30.13%. Fire and pasture disturbances are closely linked and are responsible for the current features of the savanna area of the region. Tree cutting is more a direct function of the need for the production of wood fuel, generally used by city populations. Hunting, farm- ing and honey production are of lesser importance in the area and therefore, do not pose a significantly negative effect on the gr

关键词： disturbances protected areas seasonal migration anthropogenic impact Togo

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Long Term Evaluation of Green Vegetation Cover Dynamic in the Atacora Mountain Chain(Togo) and its Relation to Carbon Sequestration in West Africa

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Journal of Mountain Science 2015年第4期12卷 921-934页

作者： fousseni folega Yao Agbélessessi WOEGAN Dourma MARRA Kperkouma WALA Komlan BATAWILA Jean Leonardo SEBURANGA ZHANG Chun-yu PENG Dao-li ZHAO Xiu-hai Koffi AKPAGANA Université de Lomé Laboratoire de botanique et écologie végétale Faculté des Sciences The Key Laboratory for Forest Resources & Ecosystem Processes of Beijing Beijing Forestry University Department of Biology Faculty of Science National University of Rwanda

The research was done in the Atacora Mountain chain in Togo which tended to assess the change of vegetation cover during a 24-year *** also aims to evaluate the dynamic of the net primary productivity(NPP) of the living plants over the same *** Landsat imagery covering three different periods(1987, 2000, and 2011) was pre-processed to correct atmospheric and radiometric parameters as well as gapfilling the 2011 SCL-off ***, the vegetation indices such as NDVI(normalized difference vegetation index), SR(simple ratiovegetation index), SAVI(soil-adjusted vegetation index), and CASA(carnegie- ames- stanford approach)model for NPP were applied on these images after masking the study *** results showed a quiet decrease in the vegetation *** vegetation loss was more significant from 2000 to 2011 than from1987 to 2000, and anthropogenic activities can be deemed as the main cause of the vegetation *** biomass assessment by NPP computation also showed a decrease over the *** to the change of the vegetation cover, the ecosystem net productivity was very low in 2011 compared to 2000 and *** seems that the general health condition of thevegetation, including its potentiality in carbon sinking,was negatively affected in this area, which has already been under threatened.A perpetual monitoring of these ecosystems by means of efficient techniques could enhance the sustainable management tools of in the framework of reducing emissions from deforestation and forest degradation(REDD).

关键词： Vegetation cover NPP Carbon sinking Biomass Togo

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Assessment of the Protected Areas Strategy in Togo under Sustainable Management: The Case Study of Oti-Keran, Togodo, and Abdoulaye Faunal Reserve

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Open Journal of Ecology 2020年第4期10卷 141-159页

作者： Kossi Fandjinou Kebin Zhang fousseni folega Beckline Mukete Xiaohui Yang Kperkouma Wala Koffi Akpagana Eve Bohnett School of Soil and Water Conservation Beijing Forestry University Beijing China Laboratoire de Botanique et d’Ecologie Végétale Université de Lome Lome Togo Department of Forest Management Beijing Forestry University Beijing China Institute of Desertification Studies Chinese Academy of Forestry Beijing China Departement of Landscape Architecture University of Florida Gainesville FL USA

This study aims to identify the drivers of environmental degradation due to the dependency of surrounding residents on three protected areas in Togo, Africa (Oti-Keran, Togodo, and Abdoulaye national parks (abbr. OTA national parks)). Surveys of villagers conducted in and around the OTA national parks added to data downloaded from Indexmundi data portal. National-level trend analysis results indicated: 1) the number of terrestrial protected areas showed an upward trend, while savannah and forest cover showed alarming decrease trends. 2) At the local level, supplying socio-economic needs in the three selected protected areas directly resulted in biodiversity degradation through animal grazing, hunting and farming. 3) Over 70% of the respondent’s livelihoods consisted of farming and related dependencies on the protected areas for timber and non-timber forest products and income despite the protected status hold by these classified areas. 4) The OTA national parks have been experiencing an increase of anthropogenic pressure such as uncontrolled tree logging and hunting, which seriously impacts animal and vegetation biodiversity. 5) Policymakers should invest more resources in implementing an integrated management system based not only on a holistic vision of the PA that includes participatory management but also accounts for multi-dimensional principles to enable anthropogenic activities in and around the protected areas to satisfy sustainable development requirements.

关键词： Classified Area Multi-Dimensional Principle Viable Strategy Approach

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