[ Mode de répartition spatiale des trois espèces Ficalhoa laurifolia, Ocotea usambarensis et Piptadeniastrum africanum dans la Réserve Forestière de Kalikuku, Province du Nord-Kivu, RD Congo ]
Volume 38, Issue 1, November 2022, Pages 151–168
Paluku Nzenda Gilbert1
1 Institut Supérieur d’Etudes Agronomiques, Vétérinaires et Forestières (ISEAVF-Butembo), BP 421, Ville de Butembo, RD Congo
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The mode of spatial distribution of Ficathoa laurifolia and Ocotea usambarensis species has been treated in the game reserve of Kalikuku, Lubero Territory. In order to reach the result, we have delimited a plot for each species and in which we have carried out the sampling of diameter critter at «DHP» of each target tree according to our criterion, and the distances which could separate the individuals as they moved closer to one another, following the method called: Nearest Neighbor Method. That means the method of the neighbor that in very near, of Clark and Evans. The results that we have found are the following. The aggregation clue R has given 0,86 for Ficalhoa laurifolia, 1,5 for Ocotea usambarensis and -3,6 for Piptadeniastrum africanum. After the application of test Z of spatial deviation, Z has given - 4,12; 12,6 and -3,6 respectively for restoring it and aggregate distribution and even Ocotea usambarensis towards unpredictable or aleatory distribution, Piptadeniastrum africanum as an aggregate. The diametric structure of the three species presents a curve in form of bell «Gauss» in the base classes to decline from the beacon classes presenting then a curve in form of reversed j, witness of a natural forest. The very great land surface for Ficalhoa laurifolia has been of 19,8398 m2 in the fourth class of diameter, 4,2398 m2 in the class for Ocotea usambarensis and 26,679 m2 of Piptadeniastrum africanum in the third class.
Author Keywords: Mode, Spatial distribution, Ocotea usambarensis, Ficalhoa laurifolia, Piptadeniastrum africanum.
Volume 38, Issue 1, November 2022, Pages 151–168
Paluku Nzenda Gilbert1
1 Institut Supérieur d’Etudes Agronomiques, Vétérinaires et Forestières (ISEAVF-Butembo), BP 421, Ville de Butembo, RD Congo
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The mode of spatial distribution of Ficathoa laurifolia and Ocotea usambarensis species has been treated in the game reserve of Kalikuku, Lubero Territory. In order to reach the result, we have delimited a plot for each species and in which we have carried out the sampling of diameter critter at «DHP» of each target tree according to our criterion, and the distances which could separate the individuals as they moved closer to one another, following the method called: Nearest Neighbor Method. That means the method of the neighbor that in very near, of Clark and Evans. The results that we have found are the following. The aggregation clue R has given 0,86 for Ficalhoa laurifolia, 1,5 for Ocotea usambarensis and -3,6 for Piptadeniastrum africanum. After the application of test Z of spatial deviation, Z has given - 4,12; 12,6 and -3,6 respectively for restoring it and aggregate distribution and even Ocotea usambarensis towards unpredictable or aleatory distribution, Piptadeniastrum africanum as an aggregate. The diametric structure of the three species presents a curve in form of bell «Gauss» in the base classes to decline from the beacon classes presenting then a curve in form of reversed j, witness of a natural forest. The very great land surface for Ficalhoa laurifolia has been of 19,8398 m2 in the fourth class of diameter, 4,2398 m2 in the class for Ocotea usambarensis and 26,679 m2 of Piptadeniastrum africanum in the third class.
Author Keywords: Mode, Spatial distribution, Ocotea usambarensis, Ficalhoa laurifolia, Piptadeniastrum africanum.
Abstract: (french)
Un mode de répartition spatiale des espèces Ficalhoa laurifolia, Ocotea usambarensis et Piptadeniastrum africanum a été mené dans la Réserve Forestière de Kalikuku dans le Territoire de Lubero. Pour y arriver, nous avons délimité une parcelle pour chaque espèce et dans laquelle nous avons procédé au prélèvement du diamètre à hauteur de poitrine (1,30m) du sol de chaque arbre cible selon notre critère, ensuite les distances qui séparaient les individus selon qu’ils se rapprochaient les uns des autres suivant la méthode « Nearest Neighbor Method », c’est-à-dire la méthode du voisin le plus proche de Clark et Evans. Les résultats auxquels nous avons abouti sont les suivants: L’indice d’agrégation R a donné 0,86 pour Ficalhoa laurifolia, 1,5 pour Ocotea usambarensis et 0,85 pour Piptadeniastrum africanum. Après application du test Z de déviation spatiale, Z a donné – 4,12; 12,6 et -3,6 respectivement pour Ficalhoa laurifolia le ramenant ainsi à une distribution agrégative, Ocotea usambarensis vers une distribution aléatoire et Piptadeniastrum africanum vers un agrégat. La structure diamétrique de ces trois espèces présente une courbe en forme de cloche (Gauss) dans les basses classes pour décliner à partir des classes phares présentant alors une courbe en forme de j renversé, témoignage d’une forêt naturelle. La plus grande surface terrière pour Ficalhoa laurifolia a été de 19,8398 m2 dans la 4e classe de diamètre et de 4,2398 m2 dans la 6e classe pour Ocotea usambarensis et 26,679m2dans la 3è classe pour Piptadeniastrum africanum.
Author Keywords: Mode, Répartition spatiale, Ficalhoa laurifolia, Ocotea usambarensis, Piptadeniastrum africanum,.
How to Cite this Article
Paluku Nzenda Gilbert, “Mode of spatial distribution of the three species Ficalhoa laurifolia, Ocotea usambarensis and Piptadeniastrum africanum in the Kalikuku Forest Reserve, North Kivu Province, DR Congo,” International Journal of Innovation and Applied Studies, vol. 38, no. 1, pp. 151–168, November 2022.
