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您的检索式：作者名="Louis Zapfack"
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| 1 | Floristic diversity and carbon stocks in the periphery of Deng–Deng National Park,Eastern Cameroon显示文摘Carbon is continuously being removed from the atmosphere by photosynthesis and stored in carbon pools(live,dead,and soil carbon)of forest ecosystems.However,carbon stock in dead wood and of trees with diameters at breast height(dbh)between 5 and 10 cm is often not considered in many studies carried out in the Congo Basin Forest.The relationship between tree diversity,life-forms and carbon stocks has received little attention.This study was carried out on the outskirts of Deng Deng National Park(DDNP)to determine tree diversity(dominant families,species richness and Shannon index),assess carbon stocks in the five carbon compartments(living tree,understory,fine roots,dead wood and litter)as well as to analyze the relationship between(1)carbon stocks and tree diversity;and,(2)between carbon stock and life-forms.The Shannon index of trees≥10 cm dbh ranged from 2.6 in riparian forest to 4.3 in secondary forest;and for the tree between 5 and 10 cm,it ranged to 1.56 in riparian forest to 3.68 in the secondary forest.The study site housed 16 species,7 genera and 3 families which are only found in trees of dbh between 5 and 10 cm.The average total carbon stock of the five compartments varied from 200.1 t ha-1 in forest residues to 439.1 t ha-1 in secondary forest.Dead wood carbon stock varied from 1.2 t ha-1 in riparian forests to 12.51t ha-1 in agroforests.The above ground carbon stocks for trees with diameter between 5 and 10 cm varied from 0.7 t ha-1 in young fallow fields to 5.02 t ha-1 in old secondary forests.This study reveals a low but positive correlation between species richness and total carbon stocks,as well as a significant positive relationship between life-forms and total carbon stocks.The findings highlight the need for more data concerning carbon content of dead wood,carbon of trees≥5 cm<10 cm dbh and the relationship between carbon stocks and tree diversity from other areas of the Congo Basin for a good understanding of the contribution of tropical forests to climate change mitigation. | Louis Paul Roger Kabelong Banoho Louis Zapfack Robert Bertrand Weladji Cedric Chimi Djomo Melanie Chichi Nyako Yannick Enock Bocko Damien Marie Essono Julliete Mancho Nasang Nade`ge Madountsap Tagnang Charles Innocent Memvi Abessolo Kenneth Roger Mvondo Sakouma Farikou Mamadou Souahibou Florence Jeanne Sarah Palla Tonga Ketchatang Peguy Remi Jiagho Thierry Loic Kenmou Ulrich Arnaud Choumele Kana Jumo Boris Armel Anyam Yi Andjik Roger Bruno Tabue Mbobda | 2020 | Journal of Forestry Research2020，31，3： | 0 |
| 2 | Floristic composition,growth temperament and conservation status of woody plant species in the Cameroonian tropical rainforests显示文摘Introduction:Cameroon’s tropical rainforests are nowadays strewn with rural forests maintained by local popula‑tions;however,these forests are not officially recognized in the non‑permanent forest domain.Rural forests are non‑delimited riparian areas within the dense moist forest,reserved for rural housing,agricultural activities and agroforestry practices,freely exploited by the local communities for their livelihood without them having any rights to artisanal and commercial logging.This study aimed at contributing to the flora knowledge and the conservation state of woody plant species in rainforests.The study was carried out in two rural forests located in the Eastern and Southern agroforestry zones of Cameroon.Methods:The method adopted for floristic inventories combined a fixed area sampling unit and a variable area sampling unit.Woody individuals with diameter at breast height(dbh)<3.2 cm were counted and shrubs of 3.2≤dbh<10 cm were measured to analyse the understorey,while trees with dbh≥10 cm were measured and identified to characterize the canopy.Results:In the Essiengbot‑Mbankoho rural forest in Eastern Cameroon,468 species belonging to 61 families were recorded in the understory while 227 species belonging to 53 families were identified at the canopy level.A total of 40(7.68%)threatened species,18(3.45%)Near Threatened species and 408(78.31%)Least Concern species were recorded.In the Nbgwassa‑Opkweng rural forest in Southern Cameroon,534 species belonging to 64 families were identified in the understory while 225 species belonging to 43 families were recorded in the canopy.A total of 54(9.69%)threatened species,25(4.49%)Near Threatened species and 421(75.58%)Least Concern species were identified in this forest.Shannon’s diversity indices were above five in the understories and canopies of both forests.Shade‑bearer species were the most represented in the understories while the non‑pioneer light‑demanding and shade‑bearer species were the most abundant in the canopies.Conclusions:Despite the influence of slash‑and‑burn agriculture and subsistence farming practices,rural forests managed by local populations provide opportunities for preserving plant biodiversity.However,the presence of threatened species,pioneer species and non‑pioneer light‑demanding species in these forests is an indicator of mod‑erate and man‑induced disturbances that,in the absence of a forest management plan or sustainable management,may threaten this biodiversity.Legal management of rural forests could help in limiting the anthropogenic activities and pressures on community forests. | Olivier Clovis Kengne Samuel Severin Kenfack Feukeng Eric Tchatchouang Ngansop Raissa Gwladys Daghela Meyan‑ya Louis Zapfack | 2022 | Ecological Processes2022，11，1： | 0 |
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