Phytodiversity of Herbaceous Vegetation in Disturbed and Undisturbed Forest Ecosystems of Pahalgam Valley, Kashmir Himalaya, India

Shameem, S. A.; Mushtaq, Hina; Wani, Aijaz A.; Ahmad, Naseer; Hai, Abdul

doi:10.9734/bjecc/2017/31696

Cited by 5 publications

(2 citation statements)

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“…The diversity of the culturable bacteria in different altitudinally varied micro-vegetational habitats of DNP revealed clear variations with respect to differences in soil properties as well as vegetation types which are often considered to be the vital factors affecting the density, diversity, growth and populations of bacteria in soil 31,93,94,99 . The vegetational diversity is considered to likely affect the soil bacterial activity, biomass as well as their composition, either in a direct manner by the production of litter and root exudates, or in an indirect way by influencing and changing the physico-chemical properties of soil [100][101][102] . In our study, results depicted that in Grassland vegetation, there was pre-dominance of soil bacterial species belonging to Firmicutes which are capable of surviving under harsh environments 103,104 .…”

Section: Discussionmentioning

confidence: 99%

Exploring soil bacterial diversity in different micro-vegetational habitats of Dachigam National Park in North-western Himalaya

Mushtaq

Ganai

Jehangir

2023

Sci Rep

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Dachigam National Park (DNP), in Zabarwan mountains of north-western Himalaya constitutes a region of high biodiversity with greater endemism. DNP is known for its unique micro-climate together with distinct vegetational zones providing home to variety of threatened and endemic plant, animal, and bird species. However, studies on soil microbial diversity in fragile ecosystems of north-western Himalaya in general and DNP in particular are lacking. This was thus a maiden attempt to study variations in soil bacterial diversity of DNP with respect to changing soil physico-chemical properties, vegetation, and altitude. Soil parameters depicted significant variations among different sites with highest values for temperature, OC, OM and TN being 22.2 ± 0.75 °C, 6.53 ± 0.32%, 11.25 ± 0.54%, 0.545 ± 0.04% from site-2 (low altitudinal grassland site) in summer and lowest of 5.1 ± 0.65 °C, 1.24 ± 0.26%, 2.14 ± 0.45% and 0.132 ± 0.04% at site-9 (high altitudinal mixed pine site) in winter. Bacterial CFU showed significant correlations with soil physico-chemical attributes. This study led to the isolation and identification of 92 morphologically varied bacteria with the highest (15) from site-2 and lowest (04) from site-9 which post BLAST analysis (via 16S rRNA analysis) depicted presence of only 57 distinct bacterial species under taxonomic phylum, Firmicutes and Proteobacteria. Nine species were widely spread (i.e., isolated from > 3 sites), however, most bacteria (37) were restricted to a particular site. Diversity indices ranged between 1.380 to 2.631 (Shannon–Weiner’s index); 0.747 to 0.923 (Simpson’s index) with highest values for site-2 and lowest for site-9. Index of similarity was highest (47.1%) between riverine sites (site-3 and site-4) whereas two mixed pine sites (site-9 and site-10) showed no similarity.

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Section: Discussionmentioning

confidence: 99%

Exploring soil bacterial diversity in different micro-vegetational habitats of Dachigam National Park in North-western Himalaya

Mushtaq

Ganai

Jehangir

2023

Sci Rep

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“…Many species had tufted or clumped growth forms. The dominance of contagious distribution may be due to the fact that majority of grass species reproduce vegetatively in addition to their sexual reproduction (Shameem et al, 2017).…”

Section: Discussion Species Composition and Diversitymentioning

confidence: 99%

Effect of tree canopy on species composition, diversity and biomass of herbaceous vegetation and soil characteristics in semi-arid forests of the Aravalli hills

Garg

Joshi

Garkoti

2020

Preprint

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Background: Herbaceous vegetation is of great ecological importance and responds quickly to environmental changes. Present study was aimed to understand the variation in herbaceous species composition, diversity, biomass and soil physicochemical properties in canopy gaps and under the canopy of semi-arid forests in the Aravalli hills. Methods: Four permanent plots consisting of canopy gaps and under canopy were established. To study herbs phytosociological attributes and biomass, 10 quadrats of 0.5 x 0.5 m size were laid in each plot. For soil physico-chemical properties, 5 soil samples were collected randomly at 0-10 cm depth from each plot. Relationship between biodiversity indices, herbs biomass and soil physicochemical properties was determined using Redundancy Analysis (RDA) and correlation analyses. Results: The sites differed in terms of herbaceous species composition, diversity, biomass and soil physico-chemical properties. Canopy gaps were dominated by grasses while forbs were higher under the canopy. Across the sites, poaceae was the dominant family. All species showed contagious distribution pattern. Oplismenus burmannii reported highest IVI (138.0; 230.5) under the canopy while Achyranthes aspera (56.15) and Eragrostis ciliaris (53.1) had highest IVI in canopy gaps. Diversity indices were higher in canopy gaps. Herbaceous community biomass in canopy gaps ranged from 700-900 gm-2 while under the canopy it ranged from 30-70 gm-2. Cenchrus ciliaris (597.97 gm-2) and Chrysopogon sp. (391.2 gm-2) constituted major proportion of biomass in canopy gaps. The soil of under canopy regions had lower pH and bulk density, but higher soil moisture (%), electrical conductivity, soil organic carbon (SOC), soil total nitrogen (TN), SOC stock and soil TN stock than the canopy gaps. Linear positive relationship between species diversity and biomass; negative relationship between soil chemical properties and herbaceous biomass was found in study area. Even though canopy had positive effects on soil physico-chemical properties, overall negative effect on herbaceous diversity and biomass was seen. Conclusions: Reduced light for photosynthesis and tree root competition for soil resources may be the major factors negatively affecting herbaceous diversity and biomass. Canopy had a significant impact and herbs species composition, diversity, biomass and soil physico-chemical properties showed distinct differences in relation to it.

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Do aeolian deposits and sand encroachment intensity shape patterns of vegetation diversity and plant functional traits in desert pavements?

et al. 2023

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Phytodiversity of Herbaceous Vegetation in Disturbed and Undisturbed Forest Ecosystems of Pahalgam Valley, Kashmir Himalaya, India

Cited by 5 publications

References 0 publications

Exploring soil bacterial diversity in different micro-vegetational habitats of Dachigam National Park in North-western Himalaya

Exploring soil bacterial diversity in different micro-vegetational habitats of Dachigam National Park in North-western Himalaya

Effect of tree canopy on species composition, diversity and biomass of herbaceous vegetation and soil characteristics in semi-arid forests of the Aravalli hills

Do aeolian deposits and sand encroachment intensity shape patterns of vegetation diversity and plant functional traits in desert pavements?

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