MYCORRHIZAL COLONIZATION PATTERNS OF THREE BLETIA SPECIES IN A NATURAL FOREST RESERVE IN MICHOACÁN, MEXICO

In any plantation establishment programme there should be adequate number of healthy seedlings and this depends on the nutrition and care given to them at the nursery stage. Pot experiment was conducted to assess the response of Moringa oleifera (Lam) seedlings to different soil and nutritional sources at nursery stage. One hundred seeds were obtained from Centre for Environmental Renewable Resources Research and Development (CENRAD) Ibadan, Nigeria and sown in germination trays. Seed germination was completed between 10-15 days, 36 uniformly growing seedlings were transplanted into polythene pots of size 29×25 cm and were filled with different soil sources at 500 gm (arable) soil, forest reserve soil and natural forest mixed with nutritional sources of the same ratio (10 gm) i.e. poultry manure, cow dung and N.P.K 15.15.15. The experiment was factorial arranged in a completely randomized design. Result showed that pots with natural forest soil mixed with 10 gm N.P.K (s3f3) produced seedlings with highest value In plant height (76.30 cm), stem diameter (3.47 mm) and number of branches (10.00) which was significantly different (p< 0.01) from the other treatments. The least value in plant height (30.70 cm) stem diameter (1.50 mm) and number of branches (3.3) were recorded in pots with forest reserve soil mixed with cow dung (s2f2). Interaction effect of soil and nutritional sources were significant for all the growth parameters assessed (p<0.01). Results showed that Natural forest soils treated with N.P.K 15.15.15 could be employed in raising Moringa oleifera seedlings at nursery stage for optimum performance.

Download Full-text

Analyse phytosociologique de la végétation de la réserve naturelle forestière de Vyanda au Sud-Ouest du Burundi

International Journal of Biological and Chemical Sciences ◽

10.4314/ijbcs.v15i4.3 ◽

2021 ◽

Vol 15 (4) ◽

pp. 1325-1337

Author(s):

André Nduwimana ◽

Richard Habonayo ◽

Blaise Ndayizeye ◽

Mathias Hitimana

Keyword(s):

Anthropogenic Disturbances ◽

Life Forms ◽

Natural Forest ◽

Natural Ecosystem ◽

Human Pressure ◽

Forest Reserve ◽

Floristic Inventory ◽

Open Forest ◽

The Impact ◽

Natural Reserves

La réserve naturelle forestière de Vyanda subit des pressions anthropiques permanentes et risque de disparaître avant qu’elle ne soit étudiée. La présente étude a pour objectif de déterminer la composition et la diversité de la végétation de cette réserve et de motiver la prise des mesures de conservation localement adaptées. L’étude a procédé par l’inventaire de la végétation suivant la méthode du relevé phytosociologique de Braun Blanquet (1932). Des spectres bruts et pondérés des formes biologiques, des types de diaspores et des types phytogéographiques ont été établis. Les résultats de l’inventaire floristique ont fait état de 108 espèces réparties en 81 genres et 41 familles. Sur le plan des formes biologiques et des types de diaspores, les phanérophytes et les sarcochores dominent tandis que les hémicryptophytes de même que les sclérochores sont bien représentés. Sur le plan phytogéographique, l’étude a mis en évidence une forte représentativité de l’élément paléo-africain, de l’élément soudano-zambézien et de l’élément guinéo-congolais. Ces spectres attestent la spécificité de cette réserve comme forêt claire du type miombo tout en mettant en évidence l’impact des perturbations dont elle est victime. L’étude met en évidence la richesse spécifique de la réserve et démontre l’intérêt qu’il y a de prendre des mesures visant à arrêter les perturbations anthropiques et à bien gérer ce milieu naturel. Sa diversité est en effet grande comparé aux autres réserves naturelles du voisinage. English title: Phytosociological analysis of the vegetation of the Vyanda natural forest reserve in southwestern Burundi The Vyanda natural forest reserve is under constant human pressure and is in danger of disappearing before it is studied. The objective of this study is to determine the composition and diversity of the vegetation of this reserve and to motivate the taking of locally adapted conservation measures. The study carried out a vegetation inventory using the Braun Blanquet (1932) phytosociological approach. Spectra of life forms, phytogeographical elements and diaspores morphology were established. The results of the floristic inventory revealed 108 species divided into 81 genera and 41 families. In terms of life forms and types of diaspores, phanerophytes and sarcochores dominate when hemicryptophytes as well as sclerochores are well represented. Phytogeographically, the study revealed a strong representativeness of the Paleo-African element, the Sudano-Zambezian element and the Guinean-Congolese element. These spectra attest to the specificity of Vyanda natural forest reserve as an open forest of the miombo type while highlighting the impact of the disturbances that affect it. The study highlights the specific richness of the reserve and its diversity and demonstrates an urgent need to take measures to stop anthropogenic disturbances and well managing this natural ecosystem. Its diversity is indeed great compared to other natural reserves in the region.

Download Full-text

Mycorrhizal Colonization Patterns Under Contrasting Grazing and Topographic Conditions in the Flooding Pampa (Argentina)

Rangeland Ecology & Management ◽

10.2111/1551-5028(2004)057[0601:mcpucg]2.0.co;2 ◽

2004 ◽

Vol 57 (6) ◽

pp. 601-605 ◽

Cited By ~ 2

Author(s):

Gonzalo Grigera ◽

Martín Oesterheld

Keyword(s):

Mycorrhizal Colonization ◽

Flooding Pampa ◽

Colonization Patterns

Download Full-text

Structural Diversity of Tree Stems of Elephant Camp Natural Forest in Omo Forest Reserve

Environmental Sciences Proceedings ◽

10.3390/iecf2020-08087 ◽

2020 ◽

Vol 3 (1) ◽

pp. 75

Author(s):

Oladele Fisayo Falade ◽

Janet Ugochukwu Iheke

Keyword(s):

Species Diversity ◽

Structural Diversity ◽

Natural Forest ◽

Tree Size ◽

Coefficient Of Determination ◽

Resource Utilisation ◽

Stem Density ◽

Old Growth ◽

Forest Reserve ◽

Old Growth Forests

Tree size diversity is an indicator of biodiversity values of a forest. Microsite conditions of a forest determine the survival and growth of trees. However, the contribution of variable habitats to tree size hierarchy and segregation is poorly understood. Tree size variation in a population is caused by different competition mechanisms. Therefore, the size distribution and spatial pattern of trees can identify the process governing resource utilisation in the forest. The objective of the study was to investigate the tree stem structural diversity in the Elephant Camp natural forest in the Omo Forest Reserve. Three and four 0.09 ha sample plots were established in Riparian (RF) and Old-growth forests (OF) in the Elephant Camp natural forest, respectively. The tree stems (Dbh ≥ 5cm) were identified to the species level and enumerated within each plot, and the stem density was computed. The diameter at breast height (Dbh) was measured with diameter tape. Species diversity was assessed using Shannon–Weiner (H’) and Simpson indices (1-D’), while size inequality was assessed using the Gini coefficient (GC), coefficient of variation (CV), H’ and I-D’. The performance of single two- and three-parameter Weibull models was evaluated using Kolmogorov–Smirnov (K-S) chi-square (χ2), root-mean-square error (RMSE), bias and the coefficient of determination (R2). Data were analysed using descriptive statistics. A total of 27 and 24 tree species were identified in RF and OF, respectively. The stem density of RF was significantly higher than that of OF. The values of species diversity (H’, 1-D’) and evenness (E’) were higher in OF than in RF, while richness (Margalef and number of species) was higher in RF than in OF. The Dbh was 38.30 ± 21.4 and 42.87 ± 19.2 cm in Riparian and Old-growth forests, respectively. Size-density distributions of both forests were positively skewed and expressed exponential pattern. The forest types of the Elephant Camp natural forest comprise the same size-density frequency shape but a different proportion of tree sizes and structural diversities.

Download Full-text

Mycorrhizal Colonization Patterns Under Contrasting Grazing and Topographic Conditions in the Flooding Pampa (Argentina)

Journal of Range Management ◽

10.2458/azu_jrm_v57i6_grigera ◽

2011 ◽

Vol 57 (6) ◽

Author(s):

Gonzalo Grigera ◽

Martin Oesterheld

Keyword(s):

Mycorrhizal Colonization ◽

Flooding Pampa ◽

Colonization Patterns

Download Full-text

Abundance and Diversity of Birds in the Ogbese Forest Reserve, Ekiti State, Nigeria

Asian Journal of Research in Zoology ◽

10.9734/ajriz/2019/v2i230063 ◽

2019 ◽

pp. 1-9

Author(s):

O. O. Ogunyemi

Keyword(s):

Species Composition ◽

Relative Abundance ◽

Bird Species ◽

Natural Forest ◽

Vegetation Types ◽

Plantation Forest ◽

Forest Reserve ◽

Dry Seasons ◽

Abundance And Diversity ◽

Wet And Dry Seasons

A study was carried out to evaluate the species composition and relative abundance of bird species of the natural and plantation forest of Ogbese Forest Rserve, Ekiti State. The study was conducted from April, 2010 to February, 2011 covering both wet and dry seasons. Sample sites were stratified based on the vegetation types and transect count techniques was employed for the evaluation. A total of 52 bird species consisting of 47 resident and 5 immigrant species was recorded. The species composition of birds during the wet and dry seasons was not significantly different. The natural forest vegetation had the highest species diversity and evenness. The relative abundance score of species during the Wet and dry seasons was variable in both habitats. The result of this study has shown that the natural and plantation vegetation types of Ogbese Forest Reserve, Ekiti State. The heterogeneity of flora species in the natural forest compared to the plantation forest might be responsible for the variation. The management of birds in the reserve should take cognisance of the vegetation types for effective conservation of bird species which are resident in the reserve.

Download Full-text

Evaluation of different nutritional and soil sources on the early growth of Moringa oleifera (Lam.)

Revista Brasileira de Gestão Ambiental e Sustentabilidade ◽

10.21438/rbgas.061322 ◽

2019 ◽

Vol 6 (13) ◽

pp. 549-555

Author(s):

M. O. Ojo

Keyword(s):

Plant Height ◽

Moringa Oleifera ◽

Growth Parameters ◽

Poultry Manure ◽

Natural Forest ◽

Stem Diameter ◽

Cow Dung ◽

Forest Reserve ◽

Moringa Oleifera Lam ◽

Number Of Branches

In any plantation establishment programme their must be adequate number of healthy seedlings and these depend on the nutrition and care given to them at the nursery stage. Pot experiment was conducted to assess the response of Moringa oleifera (Lam.) seedlings to different soil and nutritional sources at nursery stage. One hundred seeds were obtained from Centre for Environmental Renewable Resources Research and Development (CENRAD), Ibadan, Nigeria, and sown in germination trays. Seed germination was completed between 10-15 days, 36 uniformly growing seedlings were transplanted into polythene pots of size 29 cm x 25 cm and were filled with different soil sources at 500 g (arable) soil, forest reserve soil and natural forest mixed with nutritional sources of the same ratio (10 g) i.e. poultry manure, cow dung and NPK (15:15:15). The experiment was factorial arranged in a completely randomized design. Result showed that pots with natural forest soil mixed with 10 m NPK (s3f3) produced seedlings with highest value. In plant height (76.30 cm), stem diameter (3.47 mm) and number of branches (10) which was significantly different (p > 0.01) from the other treatments. The least value in plant height (30.70 cm) stem diameter (1.50 mm) and number of branches (3.3) were recorded in pots with forest reserve soil mixed with cow dung (s2f2). Interaction effect of soil and nutritional sources were significant for all the growth parameters assessed (p > 0.01). Natural forest soils treated with NPK (15:15:15) should be employed in raising Moringa oleifera seedlings at nursery stage for optimum performance.

Download Full-text