Woody plants' diversity, structural analysis and regeneration status of Wof Washa natural forest, North-east Ethiopia

被引:23
作者
Fisaha, Gebremicael [1 ]
Hundera, Kitessa [2 ]
Dalle, Gemedo [3 ]
机构
[1] Debre Berhan Univ, Coll Nat Sci, Dept Biol, Debre Berhan, Ethiopia
[2] Jimma Univ, Coll Nat Sci, Dept Biol, Jimma, Ethiopia
[3] Inst Biodivers Conservat, Addis Ababa, Ethiopia
关键词
dry Afromontane forest; plant community; population structure; regeneration; soil seed bank;
D O I
10.1111/aje.12071
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Wof-Washa forest is one of the few remaining dry Afromontane forests in the central plateau of Ethiopia. Woody species composition, structure and regeneration patterns of this forest were studied to generate information essential for formulating feasible management options for the forest. Vegetation data were collected from 64 quadrats of size 20mx20m, 10mx10m and 5mx5m for tree/shrub, sapling and seedling, respectively, laid systematically along transects. A total of 62 woody species belonging to 54 genera and 40 families were recorded. Rosaceae was the most diverse family with five (12.5%) species followed by Anacardiaceae, Euphorbiaceae and Myrsinaceae with three (7.5%) species each. Tree/shrub, sapling and seedling densities were 699, 1178 and 7618.7 individuals/ha. About 56.7% of the importance value index was contributed by Juniperus procera, Maytenus arbutifolia, Podocarpus falcatus and Ilex mitis. Vegetation classification resulted in five plant communities: Ilex mitis - Maytenus obscura, Galiniera saxifraga - Maesa lanceolata, Juniperus procera - Erica arborea, Podocapus falcatus - Allophylus abyssinicus and Pittosporum viridiflorum - Polycias fulva community types. Regeneration status of all the woody plant species was categorized as Good' (28%), Fair' (19%), Poor' (8%), None' (40%) and New' (5%). Resume La foret de Wof-Washa est une des dernieres forets seches afromontagnardes du plateau central de l'Ethiopie. La composition, la structure et les schemas de regeneration des especes ligneuses de cette foret ont ete etudies pour disposerdes informations essentielles afin de formuler des options de gestion possibles pour la foret. Les donnees sur la vegetation furent obtenues sur 64 quadrats de 20x20m, de 10x10m et de 5x5m respectivement pour les arbres et arbustes, les jeunes plants et les repousses, disposes systematiquement le long de transects. Un total de 62 especes ligneuses furent enregistrees, appartenant a 54 genres et a 40 familles. Les Rosaceae etaient la famille la plus diversifiee avec 5 especes (12.5%), suivies par les Anacardiaceae, les Euphorbiaceae et les Myrsinaceae avec 3 especes (7.5%) chacune. La densite des arbres et arbustes, des jeunes plants et des repousses etait de 699, 1178 et 7618.7 individus/ha. Pres de 56.7% de l'indice de la valeur d'importance etait du a Juniperusprocera, Maytenusarbutifolia, PodocarpusfalcatusetIlexmitis. La classification de la vegetation a abouti a cinq communautes vegetales, a savoir les types suivants: Ilexmitis - Maytenusobscura, Galinierasaxifraga - Maesalanceolata, Juniperusprocera - Erica arborea, Podocapusfalcatus - Allophylusabyssinicuset Pittosporum viridiflorum - Polyciasfulva. Le statut de regeneration de toutes les especes ligneuses a ete classe comme << Bon >> (28%), << Correct >> (19%), << Mediocre >> (8%), << Inconnu >> (40%) et << Nouveau >> (5%).
引用
收藏
页码:599 / 608
页数:10
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