conservation p111poscs, h11t also lo res m-cc manag rs. . ·c"t ... data, dcsp1 t ' 1 L'i easy a c:esst bil ny and L â¢mporal ovcrag ha sh wn to b" v r otll â¢, 1,11 . ' gr ,I.
Ba na, ., Moat,]. & Forbo eh, P. (2010). Monitoring veg tation c ver change in Mount ku and th ljim Ridge ( am ro n) using al llite and a rial n or d l cti n. In: X. van d r Burgt,J. van � r Mae n &J.-M. Onana (eds), Systematic and C ns rvation of African Plants, pp. 459-470. oyal Botani Garden , Kew.
MONITORING VEGETATION COVER CHANGES IN MOUNT OKU AND THE IJIM RIDGE (CAMEROON) USING SATELLITE AND AERIAL SENSOR DETECTION
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A.b tract �:. Ord 'r to ass, s Lh hang taking pla in th v g t.ation cov r f tr pi al m ntan, ,l tnfor t in M unt ku and th ljim R.idg a t of a'rial phot graph and r mot 'cn·s·1ng tmag w r, analys d. p t- lassifi ati n l hniqu' was u -d a· th hang ckt, ·t 1 o n pro dur and th ntir data s t was rth r tifi ·d u·ing a Raclarsat OEM h r sul show ·trong patial pallern. of d fi r station tncrat d fi r th purpo· 19 'n 58 and l 8 , foll w d by a r g '11 r· ti n progr :si n . tartin in 1988 ju ·t t r lh fir l ons rvati n Pr Ll t was r at d. In thi · last L9 8-2001 p riod, 7.8% of tl 1 8 1 leth�) 8 montan · for sl t n i n ha, b· n re ov r d. h , for·st g lation b undar n onh- asl ha b n h kl al th 1988 I v I and in lh ·asl it r' ov·r cl and l n 'lq c ed. In th w t rn b undary, the r ·scrv limit hav al o b' n held at th 19 5 1(•v . · . ·I' r •gen rat ·t 11 I' Sl·11 lak'mg pIa 11 'I. l l h ''C 1 ·llllllJ'. l
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SuJVi d · chang ments du couvert vegetal au moot Oku et la crAt d ljim (Cameroun) p I irnag ,1ar atellite et la t'ledetection aeri nn . Nin d' 'valu "r I ·s mo liri ations tv A >� ,n s clans 1, ouv rl v'g'tal d· la f r L du monl ku l la rct. cl Ijim, d·s l lltoou • , , . , . te'I' ommand' ·s 011t t' ana I ys ,, 'S. U n t d s unag ,h r clp h'1' a t,�n_clis qu'il y a u r'gen - ration t t •nsion al' ·t. l'ou ·st, I ·s limit de la r' ·· vc n lq, · ' . et ant ff' ll. a' l'i,w, . lllatnt 'nu , u niv au ou 11 'tai·nt n 19 5, la r'·g'·n -rauon ' 11 'llr d lie - i. �Ywo d h r • ange
lion cl C r station, for sl reg
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n rvati n of Afri an Plants
1 Introduction S veral r gi ns around lh world ar .urr ntly und rgoing rapid, wide-rangi �� 1 hange 1 chang in land ov r. Mu h f this a tivity is enlr d in th tropi . Th cn land ov r, in parli ular tropi al for sl l aring hav atlra l d all nti n for the g r� l 11 h use ontribulion and th profoundly n galiv impa L in bi div r ity. D fi re tal . is in r as s atmosph ri , 2 and oth r Lra ga , p sibly aff, ting ·limat , be a� : 1 th, on cntration of arbon is high r in for st than in th agri ultural lands whr · cI ru n-off and c n qu ntly n oding 1 1azai r"pla them. hi a tivity also in r a (Mas, t 99 ; My rs, 1988; II ughton, 1991). r, ropi .al f, rest oc upi'S 1 ss than 7% of th t ·rr str i a) surfa , y L ontain _mo is (My r , J988). Tr pi al d for ·tatJ 11 ·. than half of th plant and animal ·p · i responsible for mas ·ivc spe ies .xtin tion and affi L5 biol gi al div r ity in thr "�ay:j l habitat d ·stru .ti< n, is lation of form rly ont i guous for st into for sl fragments, _,lJ 1 1n ' adv rs, physi al and biologi al ons "qu "n 'S of dg"' and "buff r" ff, LS w ith I oundary zon · h twccn for ·st and deforest' l ar as (Tuck r T wnsh nd, 2000)· 1 .11 · · · · · · aJust1 r·1l _& Tu k r, 1993). �"s it � tlil' glol al oncern, several mcthod ologr ·al and orgamsallonal probl ms p �rst ·t �LH� ·•i C J 111 ·n· .stimatcs or th · magnitud � and rat ·s of cl ·for •stati n nlinu, L b a nu.uor is\c l in ons11 . it ·volution, lh · fiv · basic atcgorics distinguish •cl d uring th sup •ni · •cl Jassrh , pro ·css wcn mcrg o dur · unfi a ibl ". an all rnativ ', th £ ur diff>r nt up rvis d lassifi ations \r ' r : e 'valuatcd in t 'rm f signatur parability, a stali ti al m a ur of di tan lwe '11 two si natur . on ting n y matrix f, r a h cl · ifi ation wa als mpul d, 1• r c s ' n t ing th p r nta · of pi I. in th training amp! la. ·ifi l a p L 'd, ,/1 . . i'.'l V n1r n · 1 'a a . ur o stat1stJ a c th 1 parat1 n b tw n al gory r ·p n p Lt rn . ,c., v· i F >r v ·ry imag • lassifi ati n "m ntan for t" la, s pr ·nts high ·parability ,\ ll(• spatial variation in the VCYClation over (P •tit r>I al., 2001). . 'I ()) ('·St area 'Stimati n wa, d riv ·d from p1x' · 1 count 111 . . the output 1)in ary 1ma �s. ht•�t· r. < suits wer, used to , timat ar as and per C'ntag • of for 'SL- ov ·r hang' as w 11 l\ . 1 • • 1111,'l,l11ll'1J rat ·. 'al ulations w'f arn• 'd out for th • um mt ·rvals defin cl by th • 1 1�/f for ·st-covcr hange during 1988-19 5 ar very c_,J tl'l Deforestation was takin r plart•rj . 0< 111 whi h th r s rv ' p rforman , an l ass ss d. Th pall rn: f for sl o r 1 t l,�ng' insid th r s rv limits in this p riod ar· diffi·rcnl from th ·e hang s outsi I h I rt o 15, Cm111 ii for Bird pr ·s 'rvation. , , (I. Malingrcau,J. P., Achard, E, D'Souza, ,., Stibig, H.J., [ '. ouza,J., , str guil , . & f,v,�� S R E (1995). The :VI IRR for g l bal tropical forest monitoring: the 1 sson of the T prc�j S,,11si11g 22: 3435-3156. frif, . ( H)89). Digita l hangl' dct-' tion te hniqu •s u. ing r •mot ly s -ns d d,it,1• ingh, S .f. Nn11olr> Sensing 6: 989-1003 . . 1 jJl Skok, D. L. & Tuck
