Impacts of slope aspects on altitudinal species richness and species composition of Narapani-Masina landscape, Arghakhanchi, West Nepal

Nepali, Babu Ram; Skartveit, John; Baniya, Chitra Bahadur

doi:10.1016/j.japb.2021.04.005

Cited by 9 publications

(6 citation statements)

References 68 publications

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“…The regeneration of the species may vary due to climatic, edaphic, topographic, biological and anthropogenic factors. However, Nepali et al (2021) explained no significance of the slope and aspect on species richness which commensurate to our finding as the number of regeneration did not vary significantly with the change in slope and aspect. Shah and Shah (2016) established a relationship between slope and the number of regeneration and concluded that rolling slopes had a higher number of regeneration than regular and steep slopes.…”

Section: Discussionsupporting

confidence: 86%

Regeneration Status and Population Structure in Terai Community Forest: Evidence from Kalyankot Community Forest, Kapilvastu District, Nepal

Chhetri¹,

Shrestha²,

Parajuli³

et al. 2023

Int. J. Environ.

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The regeneration status of a forest is an essential metrics to assess the regeneration potential and population structure of forests. In emerging nations like Nepal, however, human dependency on forests has had a negative influence on forest diversity and sustainability. This paper analyzes the regeneration status and its link with bio-physical aspects and human disturbances. The data were collected using a systematic random sampling method and sample plots were established using the fishnet tool in ArcGIS. An inventory survey of 96 plots was carried out with nested circular sample plots with a main radius of 1261 cm. The overall regeneration condition of the forest was found to be in good condition according to Community Forestry Inventory Guideline, 2004. The majority of the tree species were determined to have a sound quality and medium (II) grades in this study. In terms of the diameter class distribution, lower diameter classes (21-60 cm) comprised more adults than the upper diameter classes (61-120 cm). This study found no significant variations in the effects of biophysical factors, such as slope and aspect, on species regeneration. The study concludes the inadequate silvicultural management interventions in the forest. This information can be useful to devise systematic plans to promote good-quality regeneration and manage the factors that are likely to affect the overall regeneration. Further research focusing on other biophysical factors as well as social factors and their influence on regeneration including its management techniques is recommended.

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Section: Discussionsupporting

confidence: 86%

Regeneration Status and Population Structure in Terai Community Forest: Evidence from Kalyankot Community Forest, Kapilvastu District, Nepal

Chhetri¹,

Shrestha²,

Parajuli³

et al. 2023

Int. J. Environ.

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“…Aspect causes prominent temperature alterations and therefore affects species richness and composition in the mountains indirectly by affecting the soil-plantatmosphere continuum (SPAC) (Aalto et al, 2013). The south aspect receives higher inputs of solar radiation in comparison to the north and west-facing aspects (Nepali et al, 2021). Furthermore, in temperate mountain regions like the study area, convective cloud formation is a common phenomenon (Geiger, 1950).…”

Section: Discussionmentioning

confidence: 99%

Elevation, aspect, and habitat heterogeneity determine plant diversity and compositional patterns in the Kashmir Himalaya

Wani

Negi

Bhat

et al. 2023

Front. For. Glob. Change

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Elevational gradient, slope, and aspect offer a unique opportunity to explore the response of plant species under changing environmental conditions. The present study aimed to analyze the species diversity and distribution patterns with respect to altitude, aspect, and habitat types in the Kashmir Himalayas. Considering major aspects and habitats, a total of 123 representative sites were selected along the elevational gradients for the present study. The plant species composition of each selected site was studied by organized sampling following the standard ecological methods. During the present study, a total of 361 vascular plant species belonging to 71 families and 214 genera were identified in the study area. At the lower altitudes, the southern aspect and drier habitats showed the highest diversity. Moreover, a significant amount of compositional dissimilarity was observed between the studied aspects, habitats, and elevation belts and was mainly due to species turnover rather than the nestedness component. Further, among the studied variables, altitude was the most important contributing variable, explaining the greatest variation in the species composition. The paired effects of altitude and habitat explained the maximum variation in plant species composition. It may be concluded that floristic diversity should be studied not only with reference to elevational gradients but should also include aspects and habitats. The current study will act as a reference in this direction. A similar study must be replicated in other parts of the Himalayan region in the future to improve our understanding of the distribution and preferences of plant species in mountainous zones. This, in turn, will be immensely helpful in the conservation and sustainable utilization of resources in these ecologically fragile regions.

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“…Sentani Watershed area has varied landforms ranging from a flat plain to hill, and mountain, furthermore, topography plays an important role in determining the speed of surface water in carrying soil particles. Also, one of the factors influencing and controlling the soil formation process is a slope which greatly affects species composition but has no significant effect on their richness (Nepali et al 2021). This seems possible because the mentioned parameter tends to initiate the formation of either fertile or critical land of any particular area, and the higher the slope gradient, the potential for critical land becomes greater.…”

Section: Sago Palm Habitat Based On Slope Gradientmentioning

confidence: 99%

“…In addition, the slope direction also greatly affects certain plant species. This deals with the aspect of sunlight direction as the exposure has an immediate impact on varied environmental temperatures (Nepali et al 2021) Topographically, the sago palm still lives and grows in a non-flat plain (steep to very steep). However, this plant is in form of small clusters which have poor vegetative growth and longer harvest time in certain plots of a site that has a very steep slope.…”

Section: Sago Palm Habitat Based On Slope Gradientmentioning

confidence: 99%

The spatial distribution of sago palm landscape Sentani watershed in Jayapura District, Papua Province, Indonesia

2021

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Abstract. Dimara PA, Purwanto RH, Sunarta S, Wardhana W. 2021. The spatial distribution of sago palm landscape Sentani watershed in Jayapura District, Papua Province, Indonesia. Biodiversitas 22: 3811-3820. Sago palm is one of the starch sources used as local food in Papua, therefore this research aims to identify the supporting environment for the plant to grow by utilizing spatial data. The methods used were Spatial Analysis and Field Survey, where the first employed satellite imagery of Quickbird in 2012 and Landsat 8 in 2020 to distinguish between sago and non-sago palm landscape. In the process, five parameters were used, consisting of covering land elevation, slope gradient, soil type, rainfall as well as the optimal distance from the river and lake. The result showed the sago palm landscape in Sentani Watershed lies in the elevation of 0-450 m asl, while its largest habitat which lies between 0-100 m asl covering an area of 4,385.63 is found in a flat slope covering an area of 2,941.99 ha and in a very steep slope that spreads out over 41.92 ha. Generally, in Sentani Watershed, the plant grows in Mediterranean soil possessing thick solum with pH 5.0-7.0 and medium to great soil erodibility. Moreover, the largest habitat experiences a precipitation rate of 1,750 mm yr-1 covering a total of 6,846.24 ha, while the Doyo River has the largest sago palm landscape compared to other rivers.

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Impacts of slope aspects on altitudinal species richness and species composition of Narapani-Masina landscape, Arghakhanchi, West Nepal

Cited by 9 publications

References 68 publications

Regeneration Status and Population Structure in Terai Community Forest: Evidence from Kalyankot Community Forest, Kapilvastu District, Nepal

Regeneration Status and Population Structure in Terai Community Forest: Evidence from Kalyankot Community Forest, Kapilvastu District, Nepal

Elevation, aspect, and habitat heterogeneity determine plant diversity and compositional patterns in the Kashmir Himalaya

The spatial distribution of sago palm landscape Sentani watershed in Jayapura District, Papua Province, Indonesia

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