scholarly journals Exotic Tree Species Outnumbering Native Tree Species: an Alarming Situation for the Sustainable Urban Plantation Development

Author(s):  
Muhammad Umair Umair Shafique ◽  
Adnan Younis ◽  
Muhammad Asif ◽  
Mansoor Hameed

Abstract This present study mainly focuses on the tree distribution and diversity of some selected roadsides in Faisalabad, a major city in Punjab, Pakistan. A total census of the tree population on selected roads was carried out and then studied for various parameters. Shannon–Wiener index, Reciprocal of Simpson’s diversity index, and Shannon Evenness were among the different species diversity indices which were studied. Observational results showed that the selected roads in the city hold low tree diversity, with nearly 2858 trees of 34 species, 30 genera, and 15 families. Mainly exotic tree species dominated the plantation of selected roadsides. The topmost three species contributing approximately 60% of the tree population are Conocarpus erectus, Eucalyptus crebra, and Terminalia mantaly. Despite the dominance of exotic tree species, many native tree species are also growing along selected roadsides. Since, Faisalabad has been reported as one of the most polluted cities in the world due to high suspended particulate matter, appropriate efforts are needed to improve the plantation pattern and also to enhance the canopy of the trees in the city to minimize the problem of air pollution.

2008 ◽  
pp. 29-39 ◽  
Author(s):  
Cheryl Batistel ◽  
Victor Asio

The study evaluated the effects of incorporation and subsequent decomposition of leaves of exotic tree species (Gmelina arborea, Swietenia macrophylla and Tectona grandis) and native tree species (Pterocarpus indicus, Dipterocarpus validus and Parashorea plicata) on the quality of forest soil. Forty-two pots containing an acidic and clayey forest soil and added with fresh leaves of the different tree species were setup in an open area in Mt. Pangasugan. Retrieval of the first three pots for each treatment was done after two months and the remaining three pots, five months later. Soil samples were collected from each pot and were analyzed for soil respiration rate, pH, OM, total N and available P. Findings showed that in general the exotic tree species did not change the soil pH while the native species appeared to decrease it. Regardless of tree species, leaf decomposition significantly increased available soil phosphorus. The leaves of the exotic tree species decomposed faster than those of the native tree species.


Author(s):  
MR Haider ◽  
S Alam ◽  
M Mohiuddin

Natural regeneration status of native tree species in three natural forests of Moulvibazar, Sylhet Forest Division, Bangladesh was assessed through stratified random sampling method. A total of 70 tree species belonging to 31 families was recorded. Moraceae has the maximum number of species (8 species). Myrtaceae has 6 species and Rubiaceae has 5 species while both Euphorbiaceae and Meliaceae have 4 species each. The families Anacardiaceae, Bignoniaceae, Combretaceae, Fagaceae, Lauraceae, Sterculiaceae, Verbenaceae have 3 species each, while Clausiaceae, Mimosaceae and Ternstroemiaceae has 2 species each, and the rest 16 families (viz. Apocynaceae, Aquifoliaceae, Araliaceae, Arecaceae, Bombacaceae, Burseraceae, Caesalpinaceae, Dilleniaceae, Dipterocarpaceae, Elaeocarpaceae, Lythraceae, Myrsinaceae, Polygalaceae, Rutaceae, Tiliaceae, Thymelaeaceae) comprise one species each. Artocarpus chama represents maximum seedlings production per hectare (2,528), followed by Syzygium firmum (1825), Ficus racemosa (1425), Syzygium fruticosum (1033) and Holigarna caustica (917). Biological diversity indices were also calculated which ensure a promising regeneration status of Moulvibazar Natural forests. The percentage distribution of seedlings was maximum (78.12%) for 0-50 cm height range for all species. The numbers of seedling reduced proportionately with height growth indicating the reduction recruitment of seedlings in Moulvibazar natural forests. Artocarpas chama showed maximum (1.97 %) seedling recruitment. Natural regeneration potential is useful for developing the management plans for effective functioning of Moulvibazar natural forests, Sylhet, Bangladesh.J. Biodivers. Conserv. Bioresour. Manag. 2017, 3(2): 1-10


1977 ◽  
Vol 53 (5) ◽  
pp. 287-290 ◽  
Author(s):  
W. A. G. Morsink ◽  
L. O. W. Burridge

An urban forestry program in Windsor, Ontario, focuses on the planting and maintenance of a permanent canopy of street and park trees. Diversification of the tree population has resulted from an emphasis on the use of native tree species, together with various management techniques.


Author(s):  
Nsengimana Venuste

To assesseffects of land use change on soil and litter arthropods, a research was conducted inexotic and native tree species at the Artboretum of Ruhande and in varieties of coffee andbanana plantations at the Rubona agricultural research station, in southern Rwanda. Datawere collected by pitfall traps, hand sorting, and Berlese-Tullgren funnels. Collectedspecimens of soil and litter arthropods were morphologically identified under microscope,and classified to the family level by using dichotomous keys. Fourteen orders and 20 familiescomprising 2135 individuals were identified. The family of Formicidae was more abundantcompared to the other identified families, and occurred in all land uses. High abundance anddiversity of soil and litter arthropods werefound under plots of native tree species and bananaplantations compared to exotic tree species and coffee plantations. Research concluded thatnative tree species offer suitable habitats for soil and litter arthropods.It recommendedfurtherstudies in other land uses and ecological zones of Rwanda to generalize the findings.Key words: arthropod, fauna, land use change, soil and litter


2017 ◽  
Vol 8 (3) ◽  
pp. 149
Author(s):  
Patrícia De Oliveira Neves ◽  
André Carlos Cruz Copetti ◽  
Gabriel Martini Lemos ◽  
Luís Henrique De Araújo Gouvêa ◽  
Francisco De Marques De Figueiredo ◽  
...  

A presença de áreas arborizadas reflete em benefícios tanto de caráter ecológico, quanto funcional e psicológico, pois as árvores urbanas oferecem alimentos para a avifauna, controle da poluição do ar e de ruídos, além de tranquilidade, harmonia e paz. O trabalho relata as ações do projeto de extensão “Onde há verde, há vida!”, cujo objetivo principal consiste em contribuir na melhoria das condições socioambientais do município de São Gabriel (Rio Grande do Sul, Brasil), através da produção e plantio de mudas arbóreas nativas da flora brasileira, em parceria com a comunidade gabrielense. Está sendo desenvolvido na Universidade Federal do Pampa (UNIPAMPA)/campus São Gabriel, desde 2014, com a colaboração de servidores e discentes da instituição. Em 27 meses, foram produzidas 539 mudas, das quais, 202 já foram plantadas no município, incluindo propriedades particulares, área militar e instituições de ensino. No município, a iniciativa é relevante no sentido de promover o plantio de espécies arbóreas nativas da flora local ou regional, além de dar início à arborização do campus universitário. No ambiente escolar, o plantio e o acompanhamento do crescimento das mudas pelas crianças, dará suporte para ações teórico-práticas sobre educação ambiental, importantes para a formação de cidadãos comprometidos com a preservação do meio ambiente. Em 2017, o projeto seguirá, com a firmação de novas parcerias, incluindo instituições de outros municípios. Palavras-chave: Áreas Verdes, Biodiversidade, Extensão Universitária   Native tree species planting: an alternative for improving socio-environmental conditions of the municipality of São Gabriel, Brazil Abstract: The presence of green areas brings ecological, functional and psychological benefits, because the urban trees offer food for birds, control air pollution and noise, as well as reflect tranquility, harmony, and peace. This article reports the actions from the university extension project "Where there is green, there is life!" which main objective is to improve socio-environmental conditions of São Gabriel city (Rio Grande do Sul State, Brazil), through the production and planting of native tree seedlings from Brazilian flora, in partnership with São Gabriel’s community. This work is being developed, since 2014, at the Universidade Federal do Pampa (UNIPAMPA)/campus São Gabriel, with the collaboration of employees and students. In 27 months, 539 seedlings were produced, of which 202 have already been planted in the city, including private properties, military area, and educational institutions. The project is a relevant initiative to the city, in order to promote the planting of native tree species from local or regional flora, in addition, it promotes the university campus arborization. In the school environment, the planting and monitoring of seedlings growth by children support theoretical and practical actions on environmental education, which is very important to the development of citizens committed to the environment preservation. In 2017, the project will continue, with new partnerships, including institutions from other cities. Keywords: Green Areas, Biodiversity, University Extension   Plantaciones de especies arbóreas nativas: una alternativa para la mejoría de las condiciones socio ambientales del municipio de São Gabriel, Brasil    Resumen: La presencia de zonas arborizadas refleja en beneficios tanto de carácter ecológico como funcional y psicológico, ya que los árboles urbanos ofrecen alimentos para la avifauna, control de la polución del aire y de ruidos, así como la tranquilidad, armonía y paz. El trabajo describe las acciones del proyecto de extensión “¡Donde hay verde, hay vida!”, cuyo objetivo principal consiste en contribuir con la mejoría de las condiciones socio ambientales del municipio de São Gabriel (estado de Rio Grande do Sul, Brasil), a través de la producción y plantío de plantones arbóreos nativos de la flora brasileña, en cooperación  con la comunidad de São Gabriel. Está siendo desarrollado en la Universidade Federal do Pampa (UNIPAMPA)/campus São Gabriel, desde 2014, con la colaboración de servidores y estudiantes de la institución. En 27 meses, se produjeron 539 plantones, de los cuales, 202 ya han sido plantados en el municipio, incluyendo propiedades privadas, área militar y las instituciones educativas. En la ciudad, la iniciativa es relevante en el sentido de promover la plantación de especies nativas de la flora local o regional, además de iniciar el proceso de arborización del campus universitario. En el entorno escolar, la plantación y el mantenimiento del crecimiento de los plantones por los niños, apoyarán las acciones teórico-prácticas sobre educación ambiental, importantes para la formación de ciudadanos comprometidos con la preservación del medio ambiente. En 2017, el proyecto va a seguir, con la adhesión de nuevas asociaciones, incluyendo instituciones de otros municipios. Palabras-clave: Zonas Verdes, Biodiversidad, Extensión Universitaria


2021 ◽  
Vol 305 ◽  
pp. 05002
Author(s):  
Avry Pribadi ◽  
Ahmad Junaedi

Most studies mentioned that Acacia crassicarpa belongs to invasive species that could threat the native biodiversity. To respond that issue, we conducted a study that covers the understory and soil macrofauna diversity of three native tree species, namely mahang (Macaranga pruinosa), skubung (Macaranga gigantea) and geronggang (Cratoxylum arborescens) and an exotic species namely krassikarpa in a drained peatland in Pelalawan, Riau. The observation of understory vegetation under each studied species was undertaken by using 2 x 1 m plots. Furthermore, the structure of macrofauna was observed by pitfall trap methods. Results revealed that there were two fern species namely Neprolephis biserrata and Stenochlaena palustris that dominated the understory vegetation in namely mahang (Macaranga pruinosa), skubung (Macaranga gigantea) and geronggang (Cratoxylum arborescens). The diversity index in vegetation structure among those four tree species was insignificantly varied. Moreover, the percentage of understory coverage under A. crassicarpa was significantly higher than that under all native tree species. On the other hand, Formicidae and Rhinotermitidae were dominant in skubung and krassikarpa. Meanwhile, Formicidae and Blattidae were high in mahang and geronggang. Furthermore, diversity index of macrofauna were significantly low at krassikarpas`s understory compare to other three native species. This study suggested that the introduction of krassikarpa affect the biodiversity.


2019 ◽  
Vol 29 (6) ◽  
Author(s):  
Jaime O. Yazzie ◽  
Peter Z. Fulé ◽  
Yeon‐Su Kim ◽  
Andrew Sánchez Meador

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