Ecological niche modelling for predicting the habitat suitability of endangered tree species Taxus contorta Griff. in Himachal Pradesh (Western Himalayas, India)

2022 ◽  
Author(s):  
Saurav Chauhan ◽  
Shankharoop Ghoshal ◽  
K. S. Kanwal ◽  
Vikas Sharma ◽  
G. Ravikanth
Keyword(s):  
Tree Species ◽  
Habitat Suitability ◽  
Ecological Niche ◽  
Himachal Pradesh ◽  
Ecological Niche Modelling ◽  
Western Himalayas ◽  
Niche Modelling ◽  
Endangered Tree ◽  
Endangered Tree Species

scholarly journals Predicting habitat suitability for basking sharks (Cetorhinus maximus) in UK waters using ensemble ecological niche modelling

2019 ◽  
Vol 153 ◽  
pp. 101767 ◽  
Author(s):  
Rebecca A. Austin ◽  
Lucy A. Hawkes ◽  
Philip D. Doherty ◽  
Suzanne M. Henderson ◽  
Richard Inger ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Ecological Niche ◽  
Ecological Niche Modelling ◽  
Niche Modelling ◽  
Cetorhinus Maximus

scholarly journals Ecological assessment and environmental niche modelling of Himalayan rhubarb (Rheum webbianum Royle) in northwest Himalaya

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259345
Author(s):  
Ishfaq Ahmad Wani ◽  
Susheel Verma ◽  
Priyanka Kumari ◽  
Bipin Charles ◽  
Maha J. Hashim ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Ecological Niche ◽  
Climatic Conditions ◽  
Ecological Niche Modelling ◽  
Environmental Niche ◽  
Niche Modelling ◽  
Jammu And Kashmir ◽  
Actual Distribution ◽  
Potential Habitats ◽  
Rcp 8.5

In an era of anthropocene, threatened and endemic species with small population sizes and habitat specialists experience a greater global conservation concern in view of being at higher risk of extinction. Predicting and plotting appropriate potential habitats for such species is a rational method for monitoring and restoring their dwindling populations in expected territories. Ecological niche modelling (ENM) coalesces species existence sites with environmental raster layers to construct models that describe possible distributions of plant species. The present study is aimed to study the potential distribution and cultivation hotspots for reintroducing the high value, vulnerable medicinal herb (Rheum webbianum) in the Union territories of Jammu and Kashmir and Ladakh using population attributes and ecological niche modelling approach. Sixty-three populations inventoried from twenty-eight areas display a significant change in the phytosociological attributes on account of various anthropogenic threats. The current potential habitats coincide with actual distribution records and the mean value of Area Under Curve (AUC) was 0.98 and the line of predicted omission was almost adjacent to omission in training samples, thus validating a robustness of the model. The potential habitat suitability map based on the current climatic conditions predicted a total of 103760 km2 as suitable area for the growth of Rheum webbianum. Under the future climatic conditions, there is a significant reduction in the habitat suitability ranging from -78531.34 Km2 (RCP 4.5 for 2050) to -77325.81 (RCP 8.5 for 2070). Furthermore, there is a slight increase in the suitable habitats under future climatic conditions, ranging from +21.99 Km2 under RCP 8.5 (2050) to +3.14 Km2 under RCP 4.5 (2070). The Jackknife tests indicated Precipitation of Driest Month (BIO14) as the most contributing climatic variable in governing the distribution of R. webbianum. Therefore, scientifically sound management strategies are urgently needed to save whatever populations are left in-situ to protect this species from getting extinct. Present results can be used by conservationists for mitigating the biodiversity decline and exploring undocumented populations of R. webbianum on one hand and by policymakers in implementing the policy of conservation of species with specific habitat requirements by launching species recovery programmes in future on the other.

scholarly journals Spatial Heterogeneity of Habitat Suitability for Rift Valley Fever Occurrence in Tanzania: An Ecological Niche Modelling Approach

2016 ◽  
Vol 10 (9) ◽  
pp. e0005002 ◽  
Author(s):  
Calvin Sindato ◽  
Kim B. Stevens ◽  
Esron D. Karimuribo ◽  
Leonard E. G. Mboera ◽  
Janusz T. Paweska ◽  
...  
Keyword(s):  
Spatial Heterogeneity ◽  
Habitat Suitability ◽  
Rift Valley ◽  
Ecological Niche ◽  
Rift Valley Fever ◽  
Ecological Niche Modelling ◽  
Niche Modelling ◽  
Valley Fever ◽  
Modelling Approach

Floristic Variation of Tree Communities and Their Association with Soil Properties in Pulau Jerejak, Penang, Peninsular Malaysia

2020 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Faezah Pardi
Keyword(s):  
Tree Species ◽  
Diversity Index ◽  
Basal Area ◽  
Peninsular Malaysia ◽  
Importance Value ◽  
Conservation Action ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Tree Communities ◽  
Floristic Variation

This study was conducted at Pulau Jerejak, Penang to determine the floristic variation of its tree communities. A 0.5-hectare study plot was established and divided into 11 subplots. A total of 587 trees with diameter at breast height (DBH) of 5 cm and above were measured, identified and recorded. The tree communities comprised of 84 species, 63 genera and 32 families. The Myrtaceae was the most speciose family with 10 recorded species while Syzgium glaucum (Myrtaceae) was the most frequent species. The Myrtaceae recorded the highest density of 306 individuals while Syzgium glaucum (Myrtaceae) had the highest species density of 182 individuals. Total tree basal area (BA) was 21.47 m2/ha and family with the highest BA was Myrtaceae with 5.81 m2/ha while at species level, Syzgium glaucum (Myrtaceae) was the species with the highest total BA in the plot with value of 4.95 m2/ha. The Shannon˗Weiner Diversity Index of tree communities showed a value of 3.60 (H'max = 4.43) and Evenness Index of 0.81 which indicates high uniformity of tree species. The Margalef Richness Index (R') revealed that the tree species richness was 13.02. Myrtaceae had the highest Importance Value of 20.4%. The Canonical Correspondence Analysis (CCA) showed that Diospyros buxifolia (Ebenaceae) and Pouteria malaccensis (Sapotaceae) were strongly correlated to low pH. Dysoxylum cauliflorum (Meliaceae) and Eriobotrya bengalensis (Rosaceae) were correlated to phosphorus (P) and calcium ion (Ca2+), respectively. Therefore, the trees species composition at Pulau Jerejak showed that the biodiversity is high and conservation action should be implemented to protect endangered tree species. Keywords: Floristic variation; Tree communities; Trees composition; Pulau Jerejak; Species diversity

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