scholarly journals RELATION OF THE STRUCTURE AND DIVERSITY OF VEGETATION WITH LANDSCAPE METRIC IN THE VANGUARDIA FOREST RESERVE, VILLAVICENCIO, COLOMBIA

FLORESTA ◽  
2022 ◽  
Vol 52 (1) ◽  
pp. 140
Author(s):  
Rodrigo Isaac Velosa Caicedo ◽  
Veronica Duque ◽  
Francois Herrera
2018 ◽  
Vol 2 (3) ◽  
pp. 84-92
Author(s):  
R. Obour, D. Amankwaa, A. Asare

Protected Areas (PAs) are created for the protection and maintenance of biological diversity, but many of Ghana’s PAs are subjectto severe pressures and threats, the main pressures being the illegal extraction of natural resources. Rattans are indisputablyone of the most important Non-Timber Forest Products (NTFPs) in Ghana’s Protected Areas that is without doubt one of thereasons for which it has drawn the attention of researchers. In this study the illegal rattan extraction patterns in the AnkasaConservation Area (ACA) in Ghana was inspected. Simple random sampling and Snowball sampling techniques were used. Datacollection employed the use of semi-structured questionnaires, interviews and field enumeration of rattans as well as an analysisof Effective Patrol Man-days (EPMDS) from 2004 to 2012. The results showed a significant positive correlation (r = 0.75, p<0.05, r2 = 0.557) between patrol effort and rattan extraction encounters. In addition, there was a general reduction in illegalrattan extraction encounters from 2004 to 2012 at a rate of 4.3 per year. The highest illegal rattan extraction incidences wererecorded in 2006 (76 encounters), 2005 (35 encounters), 2008 (22 encounters), 2004 (18 encounters) and the least incidencewere recorded in both 2010 (3 encounters) and 2011 (3 encounters).The research also revealed that Eremospatha macrocarpawas the most extracted rattan species followed by Laccosperma secundiflorum. The major rattan extraction and trade routesoriginate in the northern parts and in the area east of the reserve and also south of Draw River Forest Reserve. Generally, rattanpoaching in Ankasa Conservation Area has declined, but there are still human incursions in the northern part of the reserve. Thestudy recommended an intensification of patrols in the north of the reserve. Also, enrichment planting and Agroforestry practicesof inter-cropping rattans with seasonal crops should be pursued vigorously for the local communities.


2001 ◽  
Vol 152 (11) ◽  
pp. 453-459 ◽  
Author(s):  
Georg Iselin ◽  
Albin Schmidhauser

During the past ten years most cantonal forest services have undergone re-organisations. Lucerne's cantonal forest administration initiated a fundamentally new way of providing forestry services by differentiating between sovereign tasks and management tasks. By examining the individual steps of the process we demonstrate how starting with the mandate,goals were developed and implemented over several years. Product managers assumed responsibility for products, as defined in the New Public Management Project, on a cantonal-wide basis. Work within a matrix organisation has led to significant changes. Territorial responsibilities are increasingly assumed by district foresters, who have modern infrastructures at their disposal in the new forestry centres. The re-organisation has led to forest districts being re-drawn and to a reduction in the number of forest regions. To provide greater efficiency,state forest management has been consolidated into a single management unit. The new forest reserve plan removes almost half of the state forest from regular forest management,resulting in a reduction in the volume of work and in the work force. We show how effective the differentiation of sovereignty tasks and management tasks has been in coping with the effects of hurricane Lothar.


1999 ◽  
Vol 64 ◽  
Author(s):  
D. Van den Meersschaut ◽  
B. De Cuyper ◽  
K. Vandekerkhove ◽  
N. Lust

Natural  stand changes in the forest reserve of Liedekerke were analysed during the  period    1986-1996, using a permanent grid of circular plots. The monitoring  concentrated on natural    changes in species composition, using stem number and basal area as  indicators, and changes    in spatial distribution and colonization capacities of trees and shrubs,  with special interest in the    competition between exotic and indigenous species. After only a decade of  monitoring important    natural changes in the woody layer were detected. The pioneer forest is  gradually maturing    through self-thinning processes and shifts in species composition. The  overall stem number    decreased with 33.6%, while the basal area increased with 20.9%. Birch (Betula pendula/    pubescens) and indigenous oak (Quercus robur/petraea) remained  dominant. More tolerant    exotic species, like red oak (Quercus rubra) and sweet chestnut (Castanea  sativa), are slowly    increasing their share in the species composition and expanding their  range. Pioneer species on    the other hand, like aspen (Populus tremula), willow (Salix  capreaicinerealaurita), alder buckthorn    (Frangula alnus) and  common (Alnus glutinosa)  and grey alder (A. incana),  strongly declined.    Black cherry (Prunus serotina) seems to be slowly invading the forest due to its  massive    natural regeneration. Strong competition may be expected especially from  rowan ash (Sorbus    aucuparia), which showed similar regeneration  and colonization capacities. Elder (Sambucus    nigra) dramatically extented its range, though  its share remains marginal. Beech remained absent    most probably due to the lack of mature trees in the vacinity of the  forest. Finally this    change detection allowed that general predictions could be made on the  future natural development    and composition of this forest reserve, which could serve forest management  decisions.


Author(s):  
Rahmad Zakaria ◽  
Azim Rabbani ◽  
Syed Mohd Edhzam Syed Hamzah ◽  
Zulhazman Hamzah ◽  
Muhammad Faizal

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