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Data paper

Tree diversity of the Dja Faunal Reserve, southeastern Cameroon

expand article infoBonaventure Sonké, Thomas L.P. Couvreur,
† Université de Yaoundé I, Ecole Normale Supérieure, Yaoundé, Cameroon
‡ Institut de Recherche pour le Développement (IRD), Montpellier, France
Open Access

Abstract

The Dja Faunal Reserve located in southeastern Cameroon represents the largest and best protected rainforest patch in Cameroon. Here we make available a dataset on the inventory of tree species collected across the Dja. For this study nine 5 km long and 5 m wide transects were installed. All species with a diameter at breast height greater than 10 cm were recorded, identified and measured. A total of 11546 individuals were recorded, corresponding to a total of 312 species identified with 60 genera containing unidentified taxa. Of the 54 identified families Fabaceae, Rubiaceae and Malvaceae were the most species rich, whereas Fabaceae, Phyllantaceae and Olacaceae were the most abundant. Finally, Tabernaemontana crassa was the most abundant species across the Reserve. This dataset provides a unique insight into the tree diversity of the Dja Faunal Reserve and is now publically available and usable.

Keywords

Africa, diversity, transect, Dja Faunal Reserve, conservation, species inventory

Introduction

Tropical rainforests are among the most diverse plant communities worldwide and contain more than 50% of the Earth’s species diversity (Parmentier et al. 2007). Rain forests are remarkable by the diversity of tree species they contain, in places reaching up to 300 different species within a single hectare of inventoried forest (Valencia et al. 1994). Yet inventory of species in tropical countries remains challenging (Campbell and Hammond 1989). The Republic of Cameroon, situated on the Atlantic Coast in the Gulf of Guinea, covers 475440 km² and has such a great diversity of habitats that it is often compared to "a small Africa".

Although Cameroon has been better explored by botanists than most of other Central African countries (Letouzey 1968), its flora remains incompletely known, and several new species are described or newly recorded every year (e.g. Cheek 2009, Droissart et al. 2009, Lachenaud and Séné 2012, Sonké et al. 2009, Lachenaud et al. 2013). This is partly due to the high botanical diversity of the country (e.g. Kenfack et al. 2007) which includes many endemics (Onana 2011). In addition, botanical efforts have tended to focus on some specific sites (e.g. Mt Cameroon, Bakossi mountains, Campo Ma'an National Park; Cheek et al. 2004, Cable and Cheek 1998, Tchouto et al. 2006), leaving other areas almost unexplored, especially in the west and southeast (Onana 2011, Droissart et al. 2012). The present contribution publishes the results of an inventory made some years ago in the Dja Faunal Reserve, a UNESCO World Heritage Site, located in southeastern Cameroon. Its altitude is between 500 and 700 m and covers an area of 526,000 ha mainly classified as moist evergreen tropical forests  (Letouzey 1985) and belongs to the Guineo-congolian phytochoria of (White 1979). It is bounded on three-quarters of its periphery by a natural barrier that is the Dja river. The reserve also belongs to the TRIDOM forest block that encompasses several other major reserves such as Odzala National Parc in the République du Congo and the Minkébé Natinal Parc in Gabon. This region is characterized by a low collection density of botanical specimens and are thus fragmentarily known (Valkenburg et al. 1998, Onana 2011, Droissart et al. 2012).

The present dataset was available only under printed form (Sonké 2004, Sonké 1998). Here we make it available open access under electronic form. This dataset has been used to assess the role of dispersal and niche differentiation in explaining species distribution across the reserve (Hardy and Sonké 2004).

Project description
Title: 

Tree Inventory of the Dja Faunal Reserve, South Cameroon.

Personel: 

Bonaventure Sonké

Study area description: 

The dataset contains tree inventory of nine 5 km long 5 meters wide transects across the Dja Faunal Reserve. The Dja Forest Reserve is situated at 2°50 – 3°30 N and 12°20 – 13°40 E in southeastern Cameroon, bounded on three sides by the Dja River (Fig. 1), a major tributary of the Congo river, within the area known as the southern plateau. Most of the Dja Faunal Reserve is situated at 600–700 m above the sea level and covers 526,000 ha making it one of the largest and best protected areas of lowland rainforest across tropical Africa. The monthly average temperature lies between 23.5 °C and 24.5 °C and the annual rainfall between 1180 mm and 2350 mm. There are four major vegetation types in the Dja: primary terra firme primary forest (74% of total individuals collected occurring in this vegetation type); (ii) secondary forest (8% of total individuals); (iii) gaps (4% of total individuals). Finally, two hydromorphic types were defined as (iv) swamps (11%) and (v) flooded forest (3%). The different vegetation types across each transect are provided in Suppl. material 2. Transects were placed at the following coordinates:

Figure 1.

The Dja Faunal Reserve, South Cameroon, with the location of the 9 transects (T1-T9). Dark blue lines represent rivers. Light blue lines represent the delimitation of the Dja Faunal Reserve. Yellow patches are degraded vegetation while green and dark green patches represent tropical rain forest. Finer scale vegetation patterns are note represented here. Vegetation types based on Guillaumet, Chevillotte & Valton (IRD; MNHN).

T1: start: 12.8573; 3.3243; end: 12.8622; 3.2824

T2: start: 12.8637; 3.2303; end: 12.8622; 3.2726

T3: start: 12.8695; 3.1752; end: 12.8636; 3.2183

T4: start: 12.8846; 3.0895; end: 12.8787; 3.1325

T5: start: 12.5367; 3.1816; end: 12.5866; 3.1787

T6: start: 12.5958; 3.1936; end: 12.6447; 3.1925

T7: start: 13.3293; 2.9203; end: 13.3301; 2.8792

T8: start: 13.3105; 2.9787; end: 13.3133; 2.9403

T9: start: 13.5287; 3.0510; end: 13.5817; 3.0498

There are local Baka people living in the forest practicing subsistence hunting and gathering, thus there is some minimal human pressure on the forest. The forest has its full compliment of large animals, including Western Lowland Gorillas (Gorilla gorilla gorilla) and African forest elephants (Loxodonto Africana cyclotis) (Dupain et al. 2004).

Funding: 

Collection of the data in the field was funded by the European Union project ECOFAC.

Sampling methods
Study extent: 

The dataset was collected between August 1993 and August 1995.

Sampling description: 

A line transect approach was chosen to sample forest diversity because it covers the heterogeneity of the forest better than a square plot. We used standardized methods to install the transects, identify, map, measure and re-measure the trees (Baker et al. 2004). Each transect line was 5 meters wide and 5 km long. A total of 9 such transects were done at different places across the reserve Fig. 1. All trees ≥ 10 cm dbh (diameter at breast height, 1.3 m or above all deformities, notable buttresses, if present), were identified, mapped, individually numbered with an aluminium tag and nail, and measured with a diameter tape, or estimated if this the correct point of measurement was not possible to reach. Trees were identified up to species level, and in some cases just up to genus level. Voucher specimens were collected and deposited in different herbaria (mainly YA) and in case of any doubt, supplementary material was collected for further identifications.

Quality control: 

The present dataset was updated to match the APG III classification of angiosperm families (APGIII 2003) and all species names were checked for validity (spelling and authorship) against online databses (http://tnrs.iplantcollaborative.org/index.html, http://ipni.org; http://plants.jstor.org/; http://www.ville-ge.ch/musinfo/bd/cjb/africa/recherche.php).

Step description: 

The dataset presented here was collected over a period of three years.

Geographic coverage
Description: 

Data was collected in 9 different sites across the reserve as illustrated in Fig. 1.

Coordinates: 13.666667 and 2.833333 Latitude; 12.333333 and 3.5 Longitude.
Taxonomic coverage
Description: 

The dataset contains a total of 11546 tagged individuals representing 312 total taxa identified to species level (Table 1) belonging to 54 families and 213 genera (a few photos of selected species are provided in Figs 2, 3). For 60 genera some individuals remained unidentified (marked as sp.). This is mainly related to the poorly known taxonomy of those genera or lack of appropriate material (e.g. flowers) to provide a definite determination. The raw data is available in Suppl. material 1.

List of identified species collected in the Dja Faunal Reserve.

Species_name Author_name APGIII_family_name
Afzelia bella Harms Fabaceae
Afzelia bipindensis Harms Fabaceae
Aidia micrantha (K. Schum.) Bullock ex F. White Rubiaceae
Albizia adianthifolia (Schumach.) W. Wight Fabaceae
Albizia ferruginea (Guill. & Perr.) Benth. Fabaceae
Albizia glaberrima Benth. Fabaceae
Albizia gummifera (J.F. Gmel.) C.A. Sm. Fabaceae
Albizia zygia J.F. Macbr. Fabaceae
Allanblackia floribunda Oliv. Clusiaceae
Allanblackia gabonensis Bamps Clusiaceae
Allophylus africanus P. Beauv. Sapindaceae
Alstonia boonei De Wild. Apocynaceae
Amphimas ferrugineus Pierre ex Harms Fabaceae
Amphimas pterocarpoides Harms Fabaceae
Angylocalyx pynaertii De Wild. Fabaceae
Annickia affinis (Exell) Versteegh & Sosef Annonaceae
Anonidium mannii Engl. & Diels Annonaceae
Anopyxis klaineana (Pierre) Engl. Rhizophoraceae
Anthonotha cladantha (Harms) J. Léonard Fabaceae
Anthonotha fragrans (Baker f.) Exell & Hillc. Fabaceae
Anthonotha macrophylla P. Beauv. Fabaceae
Antidesma laciniatum Aubrév. Phyllanthaceae
Antidesma membranaceum Müll. Arg. Phyllanthaceae
Antidesma venosum E. Mey. ex Tul. Phyllanthaceae
Antrocaryon klaineanum Pierre Anacardiaceae
Antrocaryon micraster A. Chev. & Guillaumin Anacardiaceae
Aoranthe cladantha (K. Schum.) Somers Rubiaceae
Aulacocalyx jasminiflora Hook. f. Rubiaceae
Autranella congolensis (De Wild.) A. Chev. Sapotaceae
Baillonella toxisperma Pierre Sapotaceae
Balanites wilsoniana Dawe & Sprague Zygophyllaceae
Barteria nigritana subsp. fistulosa (Mast.) Sleumer Passifloraceae
Belonophora coriacea Hoyle Rubiaceae
Bertiera racemosa (G. Don) K. Schum. Rubiaceae
Blighia sapida K.D. Koenig Sapindaceae
Blighia welwitschii (Hiern) Radlk. Sapindaceae
Bombax brevicuspe Sprague Malvaceae
Bombax buonopozense P. Beauv. Malvaceae
Brenania brieyi (De Wild.) Petit Rubiaceae
Bridelia grandis Pierre ex Hutch. Phyllanthaceae
Bridelia micrantha (Hochst.) Baill. Phyllanthaceae
Buchnerodendron speciosum Gürke Achariaceae
Calpocalyx dinklagei Harms Fabaceae
Canarium schweinfurthii Engl. Burseraceae
Carapa procera DC. Meliaceae
Casearia barteri Mast. Salicaceae
Cavacoa quintasii (Pax & K. Hoffm.) Leonard Euphorbiaceae
Ceiba pentandra (L.) Gaertn. Malvaceae
Celtis adolfi-friderici Engl. Cannabaceae
Celtis gomphophylla Baker Cannabaceae
Celtis tessmannii Rendle Cannabaceae
Celtis zenkeri Engl. Cannabaceae
Centroplacus glaucinus Pierre Centroplacaceae
Chlamydocola chlamydantha (K. Schum.) M. Bodard Malvaceae
Chrysophyllum africanum A. DC. Sapotaceae
Chrysophyllum boukokoense (Aubrév. & Pellegr.) L. Gaut. Sapotaceae
Chrysophyllum lacourtianum De Wild. Sapotaceae
Chrysophyllum pruniforme Pierre ex Engl. Sapotaceae
Chytranthus atroviolaceus Baker f. ex Hutch. & Dalziel Sapindaceae
Chytranthus macrobotrys (Gilg) Exell & Mendonça Sapindaceae
Clausena anisata (Willd.) Hook. f. ex Benth. Rutaceae
Cleistopholis glauca Pierre ex Engl. & Diels Annonaceae
Cleistopholis patens (Benth.) Engl. & Diels Annonaceae
Coelocaryon botryoides Vermoesen Myristicaceae
Coelocaryon preussii Warb. Myristicaceae
Cola acuminata (P. Beauv.) Schott & Endl. Malvaceae
Cola altissima Engl. Malvaceae
Cola ballayi Cornu ex Heckel Malvaceae
Cola flavo-velutina K. Schum. Malvaceae
Cola lateritia K. Schum. Malvaceae
Cola verticillata (Thonn.) Stapf ex A. Chev. Malvaceae
Cordia aurantiaca Baker Boraginaceae
Cordia platythyrsa Baker Boraginaceae
Corynanthe pachyceras K. Schum. Rubiaceae
Croton oligandrus Pierre ex Hutch. Euphorbiaceae
Crotonogyne preussii Pax Euphorbiaceae
Cuviera cuvieroides (Wernham) Onana Rubiaceae
Cylicodiscus gabunensis Harms Fabaceae
Dacryodes buettneri (Engl.) H.J. Lam Burseraceae
Dacryodes edulis (G. Don) H.J. Lam Burseraceae
Dacryodes klaineana (Pierre) H.J. Lam Burseraceae
Desbordesia glaucescens (Engl.) Tiegh. Irvingiaceae
Desplatsia chrysochlamys (Mildbr. & Burret) Mildbr. & Burret Malvaceae
Desplatsia dewevrei (De Wild. & T. Durand) Burret Malvaceae
Detarium macrocarpum Harms Fabaceae
Dialium bipindense Harms Fabaceae
Dialium dinklagei Harms Fabaceae
Dialium guineense Willd. Fabaceae
Dialium zenkeri Harms Fabaceae
Dichostemma glaucescens Pierre Euphorbiaceae
Diospyros bipindensis Gürke Ebenaceae
Diospyros cinnabarina (Gürke) F. White Ebenaceae
Diospyros conocarpa Gürke & K. Schum. Ebenaceae
Diospyros crassiflora Hiern Ebenaceae
Diospyros hoyleana F. White Ebenaceae
Diospyros suaveolens Gürke Ebenaceae
Discoglypremna caloneura (Pax) Prain Euphorbiaceae
Distemonanthus benthamianus Baill. Fabaceae
Dracaena arborea (Willd.) Link Asparagaceae
Drypetes aframensis Hutch. Putranjivaceae
Drypetes africana Vahl Putranjivaceae
Drypetes afzelii (Pax) Hutch. Putranjivaceae
Drypetes capillipes (Pax) Pax & K. Hoffm. Putranjivaceae
Drypetes chevalieri Beille Putranjivaceae
Drypetes gossweileri S. Moore Putranjivaceae
Drypetes klainei Pierre ex Pax Putranjivaceae
Drypetes laciniata (Pax) Hutch. Putranjivaceae
Drypetes molunduana Pax & K. Hoffm. Putranjivaceae
Drypetes paxii Hutch. Putranjivaceae
Drypetes staudtii (Pax) Hutch. Putranjivaceae
Duboscia macrocarpa A. Chev. Malvaceae
Duguetia staudtii (Engl. & Diels) Chatrou Annonaceae
Elaeophorbia grandifolia (Haw.) Croizat Euphorbiaceae
Entada gigas (L.) Fawc. & Rendle Fabaceae
Entandrophragma angolense (Welw. ex C. DC.) C. DC. Meliaceae
Entandrophragma candollei Harms Meliaceae
Entandrophragma cylindricum (Sprague) Sprague Meliaceae
Eribroma oblongum (Mast.) Pierre ex A. Chev. Malvaceae
Eriocoelum macrocarpum Gilg ex Radlk. Sapindaceae
Erismadelphus exsul Mildbr. Vochysiaceae
Erythrophleum suaveolens (Guill. & Perr.) Brenan Fabaceae
Fernandoa adolphi-friderici (Gilg & Mildbr.) Heine Bignoniaceae
Ficus exasperata Vahl Moraceae
Ficus mucuso Welw. ex Ficalho Moraceae
Ficus sur Forssk. Moraceae
Funtumia africana (Benth.) Stapf Apocynaceae
Funtumia elastica (Preuss) Stapf Apocynaceae
Garcinia kola Heckel Clusiaceae
Garcinia gnetoides Hutch. & Dalziel Clusiaceae
Garcinia mannii Oliv. Clusiaceae
Garcinia punctata Oliv. Clusiaceae
Garcinia smeathmannii (Planch. & Triana) Oliv. Clusiaceae
Gilbertiodendron dewevrei (De Wild.) J. Léonard Fabaceae
Glyphaea brevis (Spreng.) Monach. Malvaceae
Gossweilerodendron joveri Normand ex Aubrév. Fabaceae
Greenwayodendron suaveolens (Engl. & Diels) Verdc. Annonaceae
Grewia brunnea K. Schum. Malvaceae
Grewia coriacea Mast. Malvaceae
Grewia oligoneura Sprague Malvaceae
Guarea cedrata (A. Chev.) Pellegr. Meliaceae
Guarea thompsonii Sprague & Hutch. Meliaceae
Harungana madagascariensis Lam. ex Poir. Hypericaceae
Heinsia crinita (Afzel.) G. Taylor Rubiaceae
Heisteria trillesiana Pierre Olacaceae
Heisteria zimmereri Engl. Olacaceae
Hexalobus crispiflorus A. Rich. Annonaceae
Homalium discophylum Jacq. Salicaceae
Homalium le-testui Pellegr. Salicaceae
Hylodendron gabunense Taub. Fabaceae
Hymenocardia lyrata Tul. Phyllanthaceae
Hymenostegia afzelii (Oliv.) Harms Fabaceae
Irvingia excelsa Mildbr. Irvingiaceae
Irvingia gabonensis (Aubry-Lecomte ex O'Rorke) Baill. Irvingiaceae
Irvingia grandifolia (Engl.) Engl. Irvingiaceae
Irvingia robur Mildbr. Irvingiaceae
Keayodendron bridelioides (Gilg & Mildbr. ex Hutch. & Dalziel) Leandri Phyllanthaceae
Khaya ivorensis A. Chev. Meliaceae
Klaineanthus gaboniae Pierre ex Prain Euphorbiaceae
Klainedoxa gabonensis Pierre ex Engl. Irvingiaceae
Klainedoxa microphylla A.H. Gentry Irvingiaceae
Lannea welwitschii (Hiern) Engl. Anacardiaceae
Lasiodiscus mannii Hook. f. Rhamnaceae
Lecaniodiscus cupanioides Planch. ex Benth. Sapindaceae
Lepidobotrys staudtii Engl. Lepidobotryaceae
Leptactina involucrata Hook. f. Rubiaceae
Lindackeria echinata C. Presl Achariaceae
Lovoa trichilioides Harms Meliaceae
Macaranga barteri Müll. Arg. Euphorbiaceae
Macaranga occidentalis (Müll. Arg.) Müll. Arg. Euphorbiaceae
Macaranga spinosa Müll. Arg. Euphorbiaceae
Maesobotrya klaineana (Pierre) J. Léonard Phyllanthaceae
Maesopsis eminii Engl. Rhamnaceae
Mammea africana G. Don Calophyllaceae
Manilkara letouzei Aubrév. Sapotaceae
Manilkara obovata (Sabine & G. Don) J.H. Hemsl. Sapotaceae
Maprounea membranacea Pax & K. Hoffm. Euphorbiaceae
Maranthes chrysophylla (Oliv.) Prance Chrysobalanaceae
Maranthes glabra (Oliv.) Prance Chrysobalanaceae
Mareyopsis longifolia (Pax) Pax & K. Hoffm. Euphorbiaceae
Margaritaria discoidea (Baill.) G.L. Webster Phyllanthaceae
Markhamia lutea (Benth.) K. Schum. Bignoniaceae
Massularia acuminata (G. Don) Bullock ex Hoyle Rubiaceae
Memecylon afzelii G. Don Melastomataceae
Microdesmis puberula Hook. f. ex Planch. Pandaceae
Microdesmis zenkeri Pax Pandaceae
Milicia excelsa (Welw.) C.C. Berg Moraceae
Millettia laurentii De Wild. Fabaceae
Millettia sanagana Harms Fabaceae
Mitragyna stipulosa (DC.) Kuntze Rubiaceae
Monodora myristica (Gaertn.) Dunal Annonaceae
Monodora tenuifolia Benth. Annonaceae
Musanga cecropioides R. Br. ex Tedlie Urticaceae
Myrianthus arboreus P. Beauv. Urticaceae
Nauclea diderrichii (De Wild.) Merr. Rubiaceae
Nauclea pobeguinii (Hua ex Pobég.) Merr. Rubiaceae
Nesogordonia papaverifera (A. Chev.) Capuron ex N. Hallé Malvaceae
Ochna calodendron Gilg & Mildbr. Ochnaceae
Odyendyea gabonensis (Pierre) Engl. Simaroubaceae
Omphalocarpum elatum Miers Sapotaceae
Omphalocarpum lecomteanum Pierre ex Engl. Sapotaceae
Oncoba echinata Oliv. Salicaceae
Oncoba gilgiana Sprague Salicaceae
Oncoba glauca (P. Beauv.) Planch. Salicaceae
Oncoba welwitschii Oliv. Salicaceae
Ongokea gore (Hua) Pierre Olacaceae
Ophiobotrys zenkeri Gilg Salicaceae
Oxyanthus speciosus DC. Rubiaceae
Pancovia pedicellaris Radlk. & Gilg Sapindaceae
Panda oleosa Pierre Pandaceae
Parinari excelsa Sabine Chrysobalanaceae
Parkia bicolor A. Chev. Fabaceae
Pauridiantha callicarpoides (Hiern) Bremek. Rubiaceae
Pauridiantha efferata N. Hallé Rubiaceae
Pauridiantha floribunda (K. Schum. & K. Krause) Bremek. Rubiaceae
Pausinystalia macroceras (K. Schum.) Pierre Rubiaceae
Pentaclethra macrophylla Benth. Fabaceae
Pentadesma butyracea Sabine Clusiaceae
Persea americana Mill. Lauraceae
Petersianthus macrocarpus (P. Beauv.) Liben Lecythidaceae
Phyllocosmus africanus (Hook. f.) Klotzsch Ixonanthaceae
Phyllocosmus sessiliflorus Oliv. Ixonanthaceae
Picralima nitida (Stapf) T. Durand & H. Durand Apocynaceae
Piptadeniastrum africanum (Hook. f.) Brenan Fabaceae
Plagiostyles africana (Müll. Arg.) Prain Euphorbiaceae
Pouteria altissima (A. Chev.) Baehni Sapotaceae
Pouteria pierrei (A. Chev.) E.O. Beal Sapotaceae
Pseudospondias microcarpa (A. Rich.) Engl. Anacardiaceae
Psidium guajava L. Myrtaceae
Pteleopsis hylodendron Mildbr. Combretaceae
Pterocarpus mildbraedii Harms Fabaceae
Pterocarpus soyauxii Taub. Fabaceae
Pterygota bequaertii De Wild. Malvaceae
Pycnanthus angolensis (Welw.) Warb. Myristicaceae
Quassia undulata (Guill. & Perr.) D. Dietr. Simaroubaceae
Raphia monbuttorum Drude Arecaceae
Raphia regalis Becc. Arecaceae
Rauvolfia caffra Sond. Apocynaceae
Rauvolfia vomitoria Wennberg Apocynaceae
Rhabdophyllum bracteolatum (Gilg) Farron Ochnaceae
Ricinodendron heudelotii (Baill.) Pierre ex Pax Euphorbiaceae
Rinorea longifolia De Wild. Violaceae
Rinorea oblongifolia (C.H. Wright) Marquand ex Chipp Violaceae
Rinorea spongiocarpa Achound. Violaceae
Rinorea subsessilis M. Brandt Violaceae
Rinorea welwitschii Kuntze Violaceae
Rothmannia lateriflora (K. Schum.) Keay Rubiaceae
Rothmannia lujae (De Wild.) Keay Rubiaceae
Santiria trimera (Oliv.) Aubrév. Burseraceae
Sapium ellipticum (Hochst.) Pax Euphorbiaceae
Schrebera arborea A. Chev. Oleaceae
Scottellia klaineana Pierre Achariaceae
Sorindeia grandifolia Engl. Anacardiaceae
Spathodea campanulata P. Beauv. Bignoniaceae
Staudtia kamerunensis Warb. Myristicaceae
Sterculia tragacantha Lindl. Malvaceae
Streblus usambarensis (Engl.) C.C. Berg Moraceae
Strephonema pseudo-cola A. Chev. Combretaceae
Strombosia grandifolia Hook. f. Olacaceae
Strombosia pustulata Oliv. Olacaceae
Strombosia scheffleri Engl. Olacaceae
Strombosia zenkeri Engl. Olacaceae
Strombosiopsis tetrandra Engl. Olacaceae
Symphonia globulifera L. f. Clusiaceae
Synsepalum brevipes (Baker) T.D. Penn. Sapotaceae
Synsepalum dulcificum (Schumach. & Thonn.) Daniell Sapotaceae
Synsepalum longecuneatum De Wild. Sapotaceae
Syzygium guineense (Willd.) DC. Myrtaceae
Syzygium rowlandii Sprague Myrtaceae
Tabernaemontana citrifolia L. Apocynaceae
Tabernaemontana crassa Benth. Apocynaceae
Tapura africana Oliv. Dichapetalaceae
Teclea afzelii Engl. Rutaceae
Terminalia superba Engl. & Diels Combretaceae
Tessmannia africana Harms Fabaceae
Tetracera alnifolia Willd. Dilleniaceae
Tetracera stuhlmanniana Gilg Dilleniaceae
Tetrapleura tetraptera (Schumach. & Thonn.) Taub. Fabaceae
Tetrorchidium didymostemon (Baill.) Pax & K. Hoffm. Euphorbiaceae
Treculia africana Decne. ex Trécul Moraceae
Trema orientalis (L.) Blume Cannabaceae
Tricalysia anomala E.A. Bruce Rubiaceae
Tricalysia crepiniana De Wild. & T. Durand Rubiaceae
Tricalysia discolor Brenan Rubiaceae
Trichilia monadelpha (Thonn.) J.J. de Wilde Meliaceae
Trichilia prieuriana A. Juss. Meliaceae
Trichilia rubescens Oliv. Meliaceae
Trichilia tessmannii Harms Meliaceae
Trichilia welwitschii C. DC. Meliaceae
Trichoscypha acuminata Engl. Anacardiaceae
Trichoscypha arborea A. Chev. Anacardiaceae
Tridesmostemon omphalocarpoides Engl. Sapotaceae
Trilepisium madagascariense DC. Moraceae
Triplochiton scleroxylon K. Schum. Malvaceae
Turraeanthus africana (Welw. ex C. DC.) Pellegr. Meliaceae
Uapaca acuminata (Hutch.) Pax & K. Hoffm. Phyllanthaceae
Uapaca guineensis Müll. Arg. Phyllanthaceae
Uapaca paludosa Aubrév. & Leandri Phyllanthaceae
Uapaca staudtii Pax Phyllanthaceae
Uapaca vanhouttei De Wild. Phyllanthaceae
Uvariopsis dioica (Diels) Robyns & Ghesq. Annonaceae
Vepris louisii G.C.C. Gilbert Rutaceae
Vitex grandifolia Gürke Lamiaceae
Vitex rivularis Gürke Lamiaceae
Vitex thyrsiflora Baker Lamiaceae
Vitex zenkeri Gürke Lamiaceae
Xylopia aethiopica (Dunal) A. Rich. Annonaceae
Xylopia hypolampra Mildbr. Annonaceae
Xylopia parviflora (Guill. & Perr.) Engl. & Diels Annonaceae
Xylopia quintasii Pierre ex Engl. & Diels Annonaceae
Xylopia rubescens Oliv. Annonaceae
Zanthoxylum gilletii (De Wild.) P.G. Waterman Rutaceae
Zanthoxylum heitzii (Aubrév. & Pellegr.) P.G.Waterman Rutaceae
Figure 2.

Selected species found in the Dja Faunal Reserve (1). (Photos: TLP Couvreur)

aMonodora myristica (Annonaceae)
bAmphimas pterocarpoides (Fabaceae)
Figure 3.

Selected species from the Dja Faunal Reserve (2). (Photos: a, b: TLP Couvreur; c, d: B Sonké)

aGreenwayodendron suaveolens (Annonaceae)
bAnnickia affinis (Annonaceae)
cRothmannia lateriflora (Rubiaceae)
dPauridiantha floribunda (Rubiaceae)

Of the 54 families Fabaceae, Rubiaceae and Malvaceae were the most species rich (Table 2) whereas Fabaceae, Phyllantaceae and Ochnaceae were the most abundant families in terms of individuals sampled (Table 3, Fig. 4, Suppl. material 3). Finally, Tabernaemontana crassa (Apocynaceae) was the most abundant species recorded for the reserve with 633 individuals tagged (Table 4). Species diversity and abundance per family for each transect is given in Table 5.

Ten most species rich families in the Dja Faunal Reserve (excluding non identified taxa (sp.)).

Position Family Species richness
1 Fabaceae 37
2 Rubiaceae 24
3 Malvaceae 23
4 Euphorbiaceae 18
5 Sapotaceae 16
6 Annonaceae 15
7 Meliaceae 14
8 Phyllanthaceae 13
9 Putranjivaceae 11
10 Clusiaceae 9

Ten most abundant families in terms of individuals inventoried.

Family Family abundance
Fabaceae 1203
Phyllanthaceae 1011
Olacaceae 830
Annonaceae 826
Euphorbiaceae 794
Apocynaceae 775
Meliaceae 605
Rubiaceae 446
Burseraceae 436
Malvaceae 396

Twenty most abundant species in the Dja Faunal Reserve.

Position Species Species abundance
1 Tabernaemontana crassa 633
2 Petersianthus macrocarpus 382
3 Santiria trimera 349
4 Greenwayodendron suaveolens 332
5 Uapaca guineensis 330
6 Uapaca paludosa 260
7 Strombosiopsis tetrandra 240
7 Pentaclethra macrophylla 240
7 Plagiostyles africana 240
8 Desbordesia glaucescens 210
9 Trichilia rubescens 206
10 Dichostemma glaucescens 197
11 Rinorea oblongifolia 189
12 Anonidium mannii 181
13 Strombosia pustulata 172
14 Heisteria trillesiana 156
15 Coelocaryon preussii 152
16 Carapa procera 136
17 Anthonotha macrophylla 134
18 Corynanthe pachyceras 131
19 Trichoscypha acuminata 128
20 Antidesma laciniatum 124

Tree diversity and abundance among the nine transects in the Dja Faunal Reserve. Family and species are ordered alphabetically.

Family/species
Plot number L1 L2 L3 L4 L5 L6 L7 L8 L9 Total
Achariaceae 2 2 1 2 1 8
Buchnerodendron speciosum 1 1
Lindackeria echinata 1 1
Scottellia klaineana 2 2 1 1 6
Agavaceae 2 1 1 1 5
Dracaena arborea 2 1 1 1 5
Anacardiaceae 61 60 43 42 26 32 32 22 21 339
Antrocaryon klaineanum 1 1 1 3
Antrocaryon micraster 1 1
Lannea welwitschii 1 1 2 1 4 2 3 14
Pseudospondias microcarpa 14 3 6 3 2 6 3 2 39
Sorindeia grandifolia 19 29 16 13 5 4 7 3 96
Sorindeia sp. 6 4 6 4 4 6 1 11 4 46
Trichoscypha acuminata 20 22 15 17 13 15 11 8 7 128
Trichoscypha arborea 1 1 3 6 1 12
Anisophylleaceae 1 2 2 2 3 10
Anopyxis klaineana 1 2 2 2 3 10
Annonaceae 136 112 103 69 75 97 64 99 71 826
Annickia affinis 9 17 9 5 7 10 11 14 6 88
Anonidium mannii 53 22 19 3 21 14 9 13 27 181
Cleistopholis glauca 1 4 1 5 11
Cleistopholis patens 5 5 4 4 6 4 4 2 2 36
Duguetia staudtii 4 3 5 3 4 4 2 2 2 29
Greenwayodendron suaveolens 46 37 42 28 22 45 27 55 30 332
Hexalobus crispiflorus 6 3 1 1 1 1 1 14
Monodora myristica 1 1
Monodora tenuifolia 1 3 2 1 2 9
Uvariopsis dioica 1 3 2 8 14
Xylopia aethiopica 2 2 3 2 3 2 14
Xylopia hypolampra 1 1 2
Xylopia parviflora 4 2 3 2 11
Xylopia quintasii 6 6 12 7 5 2 7 9 3 57
Xylopia rubescens 1 4 4 2 5 1 1 18
Xylopia sp. 2 1 2 1 3 9
Apocynaceae 73 145 36 79 133 124 71 82 32 775
Alstonia boonei 5 5 1 4 10 7 5 6 2 45
Funtumia africana 1 1
Funtumia elastica 2 5 2 1 16 25 6 5 2 64
Landolphia sp. 3 2 5
Picralima nitida 2 2 4 5 2 1 1 17
Rauvolfia caffra 1 1 2
Rauvolfia vomitoria 1 1 2 1 5
Strophanthus sp. 1 1
Tabernaemontana citrifolia 1 1
Tabernaemontana crassa 63 132 32 66 100 87 59 67 27 633
Tabernanthe sp. 1 1
Arecaceae 10 2 17 38 1 25 93
Raphia monbuttorum 10 2 17 38 1 68
Raphia regalis 25 25
Asteraceae 1 1
Vernonia sp. 1 1
Bignoniaceae 2 2 1 8 3 8 3 1 3 31
Fernandoa adolfi-friderici 1 2 1 1 2 1 8
Markhamia lutea 1 7 3 6 2 19
Spathodea campanulata 3 1 4
Boraginaceae 1 1 2 1 2 2 9
Cordia aurantiaca 1 2 1 4
Cordia platythyrsa 1 2 2 5
Burseraceae 64 63 50 43 46 51 30 40 49 436
Canarium schweinfurthii 1 1 1 2 2 2 9
Dacryodes buettneri 10 1 11
Dacryodes edulis 17 6 2 4 10 14 2 1 4 60
Dacryodes klaineana 1 1
Dacryodes sp. 1 4 1 6
Santiria trimera 45 56 44 38 24 34 26 37 45 349
Calophyllaceae 6 4 7 2 4 4 6 3 3 39
Mammea africana 6 4 7 2 4 4 6 3 3 39
Cannabaceae 69 28 13 10 11 35 24 9 16 215
Celtis adolfi-friderici 1 1
Celtis gomphophylla 1 1
Celtis tessmannii 19 17 5 5 11 7 19 8 11 102
Celtis zenkeri 50 11 7 5 28 5 1 1 108
Trema orientalis 3 3
Celastraceae 8 7 5 3 7 30
Salacia sp. 8 7 5 3 7 30
Centroplacaceae 6 6 12 4 1 5 34
Centroplacus glaucinus 6 6 12 4 1 5 34
Chrysobalanaceae 17 11 7 12 3 6 4 19 79
Acioa sp. 1 1 2
Maranthes chrysophylla 1 8 2 14 25
Maranthes glabra 12 4 3 2 2 2 1 26
Maranthes sp. 5 4 2 2 1 1 1 2 18
Parinari excelsa 2 1 1 1 2 7
Parinari sp. 1 1
Clusiaceae 22 20 38 16 8 5 19 19 15 162
Allanblackia floribunda 13 5 6 8 6 1 8 2 10 59
Allanblackia gabonensis 1 1
Garcinia gnetoides 2 4 6
Garcinia kola 1 1
Garcinia mannii 4 12 9 8 2 2 5 2 1 45
Garcinia punctata 1 1
Garcinia smeathmannii 11 11
Garcinia sp. 2 1 3
Pentadesma butyracea 2 1 3
Symphonia globulifera 4 1 10 2 4 8 3 32
Combretaceae 3 8 2 10 12 5 6 4 5 55
Combretum sp. 5 1 2 8
Pteleopsis hylodendron 1 1 4 6 1 1 1 15
Strephonema pseudo-cola 1 1
Strephonema sp. 1 3 4
Terminalia superba 2 2 4 6 1 5 3 4 27
Dichapetalaceae 1 1
Tapura africana 1 1
Dilleniaceae 2 5 3 10
Tetracera alnifolia 1 3 4
Tetracera stuhlmanniana 1 5 6
Ebenaceae 17 14 3 3 17 16 10 10 14 104
Diospyros bipindensis 1 3 1 5
Diospyros cinnabarina 3 3
Diospyros conocarpa 1 1
Diospyros crassiflora 1 3 2 7 13
Diospyros hoyleana 4 4 2 5 5 1 6 27
Diospyros sp. 4 4 1 1 7 2 1 2 1 23
Diospyros suaveolens 8 5 1 2 9 2 5 32
Euphorbiaceae 32 82 80 84 100 29 133 139 81 760
Cavacoa quintasii 17 17
Croton oligandrus 1 1
Crotonogyne preussii 1 1
Dichostemma glaucescens 12 37 38 32 55 4 13 6 197
Discoglypremna caloneura 4 2 5 4 3 3 1 22
Elaeophorbia grandifolia 1 1
Hymenocardia lyrata 1 2 1 7 11
Hymenocardia sp. 1 1 2
Klaineanthus gaboniae 5 6 1 7 11 3 11 13 57
Macaranga barteri 2 3 5
Macaranga occidentalis 2 2 4
Macaranga sp. 4 2 2 1 1 2 12
Macaranga spinosa 11 10 2 1 12 4 12 1 53
Maprounea membranacea 3 3
Maprounea sp. 1 1
Mareyopsis longifolia 21 28 21 5 1 22 1 99
Plagiostyles africana 1 2 1 4 86 103 43 240
Ricinodendron heudelotii 3 1 4 2 2 3 15
Sapium ellipticum 1 1 1 1 4
Tetrorchidium didymostemon 1 5 9 15
Fabaceae 181 156 164 123 130 107 157 84 101 1203
Afzelia bella 1 1
Afzelia bipindensis 1 2 1 4
Albizia adianthifolia 3 2 1 6 2 3 17
Albizia ferruginea 1 1
Albizia glaberrima 1 3 1 1 3 4 13
Albizia gummifera 3 4 7
Albizia sp. 5 1 1 1 8
Albizia zygia 1 1 1 1 4
Amphimas ferrugineus 2 2
Amphimas pterocarpoides 1 1 1 2 1 6
Angylocalyx pynaertii 8 6 13 10 3 9 13 1 12 75
Angylocalyx sp. 1 1 1 3
Anthonotha cladantha 7 13 18 1 39
Anthonotha fragrans 3 3
Anthonotha macrophylla 10 26 38 19 10 12 7 10 2 134
Anthonotha sp. 1 1 2
Balanites wilsoniana 1 1
Baphia sp. 1 1
Calpocalyx dinklagei 8 8 13 20 10 10 3 12 5 89
Cylicodiscus gabunensis 3 5 1 1 5 1 2 2 20
Detarium macrocarpum 1 1 1 3 3 2 1 12
Dialium bipindense 1 1
Dialium dinklagei 4 2 1 1 8
Dialium guineense 1 1 1 6 3 3 15
Dialium zenkeri 3 3 15 16 8 8 6 1 2 62
Distemonanthus benthamianus 15 4 2 1 13 7 42
Entada gigas 2 5 1 3 5 16
Erythrophleum suaveolens 4 6 1 6 6 8 2 3 36
Gilbertiodendron dewevrei 52 1 53
Gossweilerodendron joveri 1 1
Hylodendron gabunense 19 12 8 5 9 8 9 3 4 77
Hymenostegia afzelii 1 1
Millettia laurentii 2 2
Millettia sanagana 2 2
Millettia sp. 1 2 1 4
Newtonia sp. 1 1
Oddoniodendron sp. 1 1
Parkia bicolor 3 1 1 5
Pentaclethra macrophylla 44 31 31 24 29 14 19 25 23 240
Piptadeniastrum africanum 7 1 1 1 2 9 2 7 30
Pterocarpus mildbraedii 16 12 1 3 4 2 3 41
Pterocarpus soyauxii 15 7 7 5 10 10 7 4 11 76
Tessmannia africana 4 1 6 5 15 31
Tetrapleura tetraptera 2 4 1 1 7 1 16
Hypericaceae 3 3
Harungana madagascariensis 3 3
Irvingiaceae 34 40 49 62 42 43 34 44 37 385
Desbordesia glaucescens 13 31 25 43 25 28 12 16 17 210
Irvingia excelsa 1 1 2
Irvingia gabonensis 11 4 15 8 10 4 12 10 8 82
Irvingia grandifolia 4 2 2 3 2 5 1 3 3 25
Irvingia robur 1 1
Irvingia sp. 1 1
Klainedoxa gabonensis 3 2 6 8 5 6 5 13 7 55
Klainedoxa microphylla 3 1 2 2 1 9
Ixonanthaceae 4 1 3 8
Oubanguia sp. 1 1
Phyllocosmus africanus 1 1 2
Phyllocosmus sessiliflorus 3 3
Phyllocosmus sp. 2 2
Lauraceae 4 5 3 3 3 6 5 2 6 37
Beilschmiedia sp. 4 5 3 3 2 6 1 2 6 32
Persea americana 1 4 5
Lecythidaceae 101 47 19 8 81 51 34 20 21 382
Petersianthus macrocarpus 101 47 19 8 81 51 34 20 21 382
Lepidobotryaceae 15 21 12 5 4 5 7 13 2 84
Lepidobotrys staudtii 15 21 12 5 4 5 7 13 2 84
Loganiaceae 1 1 1 3
Strychnos sp. 1 1 1 3
Malvaceae 39 56 45 45 55 35 63 49 31 418
Bombax brevicuspe 1 3 5 9
Bombax buonopozense 1 1 2 2 6
Ceiba pentandra 2 1 1 1 2 7
Chlamydocola chlamydantha 1 4 2 2 2 1 1 13
Cola acuminata 6 9 13 1 3 5 37
Cola altissima 1 1
Cola ballayi 3 3 4 6 16
Cola flavo-velutina 1 1
Cola lateritia 4 5 3 1 11 6 6 2 38
Cola sp. 8 4 10 16 1 1 7 12 2 61
Cola verticillata 1 1
Desplatsia chrysochlamys 4 12 4 7 9 6 6 1 49
Desplatsia dewevrei 3 3
Duboscia macrocarpa 6 11 11 10 4 9 11 6 8 76
Eribroma oblongum 2 1 2 3 1 9
Glyphaea brevis 1 5 6
Grewia brunnea 2 2
Grewia coriacea 2 2
Grewia oligoneura 1 2 3
Grewia sp. 2 1 1 4 8
Leptonichia sp. 1 1 1 3
Nesogordonia papaverifera 1 1 2
Octolobus sp. 1 1
Pterygota bequaertii 3 1 3 7
Pterygota sp. 1 1 2
Sterculia tragacantha 7 7 2 2 4 7 11 3 4 47
Triplochiton scleroxylon 1 3 4 8
Melastomataceae 3 3
Memecylon afzelii 3 3
Meliaceae 97 98 57 23 56 65 71 67 71 605
Carapa procera 36 27 19 1 16 22 5 7 3 136
Entandrophragma angolense 4 1 2 2 9
Entandrophragma candollei 4 2 1 4 3 5 19
Entandrophragma cylindricum 2 2 1 2 5 3 2 17
Entandrophragma sp. 4 2 6
Guarea cedrata 2 1 2 1 10 2 18 36
Guarea thompsonii 3 1 1 1 8 6 20
Khaya ivorensis 1 1
Lovoa trichilioides 7 10 6 2 1 4 4 2 36
Trichilia monadelpha 2 2 11 1 9 25
Trichilia prieuriana 2 1 3
Trichilia rubescens 33 46 24 8 26 26 25 18 206
Trichilia sp. 1 1 1 3 2 1 2 3 1 15
Trichilia tessmannii 49 1 50
Trichilia welwitschii 3 1 4
Turraeanthus africana 1 6 2 2 11 22
Moraceae 75 17 7 9 10 3 21 4 30 176
Ficus exasperata 2 7 2 11
Ficus mucuso 4 1 6 11
Ficus sur 1 1
Milicia excelsa 1 1 2 4 2 2 12
Streblus usambarensis 6 7 15 28
Treculia africana 7 5 4 2 2 3 2 25
Trilepisium madagascariense 65 12 2 1 6 2 88
Myristicaceae 65 19 19 9 41 13 65 29 48 308
Coelocaryon botryoides 1 1
Coelocaryon preussii 38 5 7 2 17 5 39 11 28 152
Pycnanthus angolensis 8 6 3 3 9 1 9 2 8 49
Staudtia kamerunensis 18 8 9 4 15 7 17 16 12 106
Myrsinaceae 1 1
Embelia sp. 1 1
Myrtaceae 5 6 4 9 2 4 3 7 8 48
Eugenia sp. 4 2 3 3 1 6 4 23
Psidium guajava 1 1
Syzygium guineense 1 1
Syzygium rowlandii 4 1 6 2 2 2 1 4 22
Syzygium sp. 1 1
Ochnaceae 4 1 4 6 1 5 2 3 26
Ochna calodendron 2 2
Rhabdophyllum bracteolatum 4 1 4 6 1 3 2 3 24
Olacaceae 95 82 108 82 104 80 73 106 100 830
Heisteria trillesiana 41 16 22 7 51 16 2 1 156
Heisteria zimmereri 2 4 1 26 24 35 92
Ongokea gore 5 1 4 2 4 1 2 2 1 22
Strombosia grandifolia 1 1 2 1 2 9 4 9 29
Strombosia pustulata 13 7 30 27 19 25 7 18 26 172
Strombosia scheffleri 4 16 21 9 1 14 5 12 1 83
Strombosia sp. 1 1 2
Strombosia zenkeri 5 27 2 34
Strombosiopsis tetrandra 29 36 24 35 2 19 22 46 27 240
Oleaceae 1 1
Schrebera arborea 1 1
Pandaceae 9 10 6 12 6 13 8 8 14 86
Microdesmis puberula 1 1
Microdesmis sp. 4 5 2 3 4 1 7 26
Microdesmis zenkeri 1 1
Panda oleosa 5 5 3 11 3 9 7 8 7 58
Passifloraceae 4 4 1 9 1 19
Barteria nigritana subsp. fistulosa 4 4 1 9 1 19
Phyllanthaceae 127 170 90 77 124 68 107 171 77 1011
Antidesma laciniatum 8 22 18 31 4 4 15 16 6 124
Antidesma membranaceum 3 5 2 6 2 9 4 4 35
Antidesma sp. 2 1 4 7
Antidesma venosum 2 1 11 1 15
Bridelia grandis 2 1 9 4 16
Bridelia micrantha 9 2 2 1 1 1 16
Keayodendron bridelioides 5 4 3 5 4 4 1 7 2 35
Maesobotrya klaineana 6 11 3 4 5 4 3 8 4 48
Maesobotrya sp. 3 3
Margaritaria discoidea 1 1 1 3 13 1 20
Uapaca acuminata 16 21 2 19 3 7 68
Uapaca guineensis 18 72 37 24 12 22 31 87 27 330
Uapaca paludosa 60 30 22 4 74 25 13 12 20 260
Uapaca staudtii 1 3 10 6 20
Uapaca vanhouttei 1 9 1 3 14
Putranjivaceae 35 17 84 61 13 4 30 46 30 320
Drypetes aframensis 1 7 2 10
Drypetes africana 1 1
Drypetes afzelii 1 1
Drypetes capillipes 5 5
Drypetes chevalieri 6 1 10 5 22
Drypetes gossweileri 2 2 4
Drypetes klainei 5 5
Drypetes laciniata 1 1 1 1 3 7
Drypetes molunduana 1 1
Drypetes paxii 1 1
Drypetes sp. 22 14 66 41 12 2 27 40 20 244
Drypetes staudtii 4 1 5 6 1 1 1 19
Rhamnaceae 1 7 17 13 4 3 2 3 5 55
Lasiodiscus mannii 1 4 16 13 2 3 3 4 46
Maesopsis eminii 3 1 2 2 1 9
Rubiaceae 34 29 64 61 30 40 59 57 72 446
Aidia micrantha 17 12 52 81
Aoranthe cladantha 3 4 3 4 1 1 16
Aulacocalyx jasminiflora 2 1 3
Belonophora coriacea 2 2
Bertiera racemosa 1 1
Brenania brieyi 3 1 2 2 2 3 1 14
Canthium sp. 2 4 1 4 1 2 2 16
Corynanthe pachyceras 6 8 32 23 7 5 21 26 3 131
Cuviera cuvieroides 1 2 6 7 1 9 26
Cuviera sp. 1 1
Heinsia crinita 1 2 2 4 9
Leptactina involucrata 1 1
Massularia acuminata 1 1 1 1 4
Mitragyna stipulosa 2 5 2 1 1 4 15
Nauclea diderrichii 2 2 1 1 6
Nauclea pobeguinii 1 1 1 3
Oxyanthus speciosus 2 1 3
Pauridiantha callicarpoides 1 1
Pauridiantha efferata 1 5 1 2 2 11
Pauridiantha floribunda 3 1 5 1 1 11
Pausinystalia macroceras 1 1
Pavetta sp. 1 1
Rothmannia lateriflora 5 3 3 2 6 1 2 22
Rothmannia lujae 4 5 3 2 3 6 7 5 3 38
Tricalysia anomala 1 3 2 6
Tricalysia crepiniana 1 1 2
Tricalysia discolor 1 3 6 3 5 1 1 20
Tricalysia sp. 1 1
Rutaceae 7 4 4 6 6 6 10 2 3 48
Clausena anisata 1 1
Teclea afzelii 1 1 2
Vepris louisii 2 2 4
Zanthoxylum gilletii 7 3 4 3 6 5 3 2 3 36
Zanthoxylum heitzii 1 4 5
Salicaceae 23 22 19 22 21 19 4 5 8 143
Casearia barteri 11 6 16 2 4 2 41
Homalium discophylum 4 7 9 4 4 3 4 35
Homalium le-testui 1 1
Homalium sp. 2 1 1 2 6
Oncoba echinata 3 1 4
Oncoba gilgiana 1 1
Oncoba glauca 2 6 1 8 12 12 1 5 47
Oncoba sp. 1 2 3
Oncoba welwitschii 1 1
Ophiobotrys sp. 2 2
Ophiobotrys zenkeri 2 2
Sapindaceae 33 34 23 67 14 35 34 21 9 270
Allophylus africanus 4 4
Blighia sapida 18 13 8 8 6 19 2 5 2 81
Blighia sp. 1 1
Blighia welwitschii 3 11 12 1 9 6 5 47
Chytranthus atroviolaceus 1 1
Chytranthus macrobotrys 1 1
Chytranthus sp. 6 1 1 8 3 5 7 1 32
Eriocoelum macrocarpum 4 8 8 2 1 1 24
Lecaniodiscus cupanioides 2 1 5 2 9 7 1 27
Pancovia pedicellaris 6 31 5 7 3 52
Sapotaceae 26 17 43 22 7 12 16 5 17 165
Afrosersalisia sp. 3 1 4
Autranella congolensis 1 1
Baillonella toxisperma 3 2 1 1 1 8
Chrysophyllum africanum 1 2 3 1 3 10
Chrysophyllum boukokoense 1 1 1 1 1 5
Chrysophyllum lacourtianum 9 7 1 2 2 9 3 1 34
Chrysophyllum pruniforme 1 2 1 1 5
Chrysophyllum sp. 1 1
Letestua sp. 1 1
Manilkara letouzei 3 1 5 7 4 1 21
Manilkara obovata 2 2
Manilkara sp. 1 1 2
Omphalocarpum elatum 1 1 2
Omphalocarpum lecomteanum 2 2
Pouteria altissima 1 1 1 1 2 6
Pouteria pierrei 1 1
Pouteria sp. 1 1
Synsepalum brevipes 1 3 4
Synsepalum dulcificum 23 23
Synsepalum longecuneatum 2 3 3 3 2 1 14
Tridesmostemon omphalocarpoides 2 1 3 4 1 1 6 18
Simaroubaceae 8 2 1 1 2 3 6 5 28
Odyendyea gabonensis 8 2 1 1 2 2 6 5 27
Quassia undulata 1 1
Urticaceae 17 14 1 5 12 6 45 2 59 161
Musanga cecropioides 12 2 7 1 21 57 100
Myrianthus arboreus 5 14 1 3 5 5 24 2 2 61
Verbenaceae 3 5 1 4 1 6 2 3 25
Vitex grandifolia 1 1
Vitex rivularis 2 5 3 1 11
Vitex sp. 1 1 2 2 6
Vitex thyrsiflora 1 1
Vitex zenkeri 5 1 6
Violaceae 26 16 18 13 3 11 30 50 28 195
Rinorea longifolia 1 1
Rinorea oblongifolia 23 15 18 12 3 11 30 49 28 189
Rinorea spongiocarpa 1 1
Rinorea subsessilis 1 1 2
Rinorea welwitschii 2 2
Vochysiaceae 2 4 18 1 3 1 2 31
Erismadelphus exsul 2 4 18 1 3 1 2 31
Total 1579 1472 1299 1147 1238 1100 1311 1245 1155 11546
Figure 4.

Plant family abundance in the Dja Faunal Reserve. This table was produced from Suppl. material 3.

Traits coverage

The only trait measured and published in this dataset is the diameter at breast height for each individual found in Suppl. material 1.

Temporal coverage
Data range: 
1993 8 01 - 1995 8 31.
Usage rights
Use license: 
Creative Commons CCZero
IP rights notes: 

This dataset can be freely used provided it is cited

Data resources
Data package title: 
Djatrees: Trees of the Dja Faunal Reserve
Number of data sets: 
1
Data set name: 
Djatrees
Data format: 
excel sheet
Description: 

List of all individuals (including sp.) per transect collected in the nine transects.

Column label Column description
Species_name Name of the identified species
Family_name Plant family for the species follwing APG III
Transect_number Transect number
Diameter Diameter at breast hight (in cm)

Author contributions

BS collected the data; BS & TC analyzed and curated the data; BS & TC wrote the paper. The authors wish to thank Vincent Droissart, Gretchen Walters and Lyubomir Penev for comments and improvements to an earlier draft.

References

Supplementary materials

Suppl. material 1: List of all individuals collected in all 9 transects of the Dja Faunal Resreve.
Authors:  Sonké & Couvreur
Data type:  List of individuals collected in each transcet in the Dja Faunal Reserve
Brief description: 

This is the raw dataset with indication of each individual collected as well as its diameter. This dataset is also availible at https://sites.google.com/site/tlpcouvreur/home/ressources.

Suppl. material 2: Vegetation distribution across the transects in the Dja Faunal Reserve Cameroon
Authors:  Sonké & Couvreur
Data type:  excel sheet
Suppl. material 3: Individual abundances per family
Authors:  Sonké & Couvreur
Data type:  excel sheet
Brief description: 

This sheet provides the number of individuals per family for all the species collected in the Dja Faunal Reserve. First coloum: Family; second coloum: number of individuals. this table was used to generate figure 2 of the article.