Wisdom of the crowd: evidence for density-dependent species fitness in Hyptis suaveolens (L.) Poit. DOI Creative Commons

Kanhaiya Shah,

Gyan Prakash Sharma

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: May 14, 2025

Abstract Background Biological invasions pose severe threats to global biodiversity and human well-being. Invading populations often experience negative growth rates during the ‘lag phase’, leading Allee effects, a density-dependent phenomenon. effects reduce species fitness or plant performance due low-density populations. The rapid spread range expansion of an invader, Hyptis suaveolens (L.) Poit. has been reported have impacts on local in invaded regions Vindhyan highlands, India. present study examines varied population densities H. its vegetative trait performance, reproductive output, regulations. Understanding relationship between density modulation ability at fine coarse scales could help strategize for management. Methods was conducted habitats Population divided into low-, medium-, high-density groups. Plant assessed two scales—fine scale scale. traits, growth, output were estimated as traits (PlTs) patch (PaTs) plasticity response index (PI) also among three densities. Results showed that PlTs-vegetative such height, biomass, number seeds, significantly different across densities, with medium-density individuals showing maximum height biomass exhibiting higher seeds per plant. PaTs analysis revealed similar medium- populations, whereas low- PI values PlTs low, medium, high plastic responses, while exhibited low responses. Conclusions concludes exhibits As increases, grow more rapidly, resulting denser These can negatively impact recipient and, if left unchecked, seed production. suggests areas should be considered priority developing efficient cost-effective management strategies. emphasizes importance incorporating dynamics invasion studies predicting high-risk/priority strategizing invasive

Language: Английский

Changes in Soil Properties, Organic Carbon, and Nutrient Stocks After Land‐Use Change From Forests to Grasslands in Kumaun Himalaya, India DOI Open Access
Archana Fartyal, Surendra Singh Bargali, Kiran Bargali

et al.

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

ABSTRACT Land‐use changes are anticipated to be a substantial contributor global change climate, substantially causing significant modifications in soil characteristics. This study addressed the impact of land‐use from native forests grasslands on physico‐chemical properties entirely replicated three different forest zones (Oak, Pine and Cypress) temperate region Kumaun Himalaya. A total 162 samples (6 sites × 3 plots seasons depths = samples) were randomly collected each site triplicates depths. The texture, bulk density (bD), porosity, water holding capacity, moisture content, pH, organic carbon (SOC), nitrogen (TN), available phosphorus (P) potassium (K) determined at grassland sites. Results showed that bD, SOC, TN, P K significantly ( p < 0.05) decreased with increasing depth. Moreover, conversion into reduced nutrient concentrations, physical qualities (bD porosity), pH levels. decreasing trend along depth explains zone accumulation is not well established these because leaching effect. Our findings indicate natural resulted losses SOC TN stocks which can attributed disturbance forests. Therefore, while making plans, alterations nutrients must considered. These emphasize value establishing vegetation (forests) areas retain safeguard against runoff erosion. However, anticipating impacts alteration necessitates better comprehension its relations other drivers change, such as changing climate deposition.

Language: Английский

Citations

6
The Relationship Between Phenological Characteristics and Life Forms Within Temperate Semi-Natural Grassland Ecosystems in the Central Himalaya Region of India DOI Creative Commons
Archana Fartyal, Rupesh Chaturvedi, Surendra Singh Bargali

et al.

Plants, Journal Year: 2025, Volume and Issue: 14(6), P. 835 - 835

Published: March 7, 2025

The seasonal phenological segregation observed among various species within a plant community can be interpreted as form of niche differentiation that facilitates the coexistence these species. In present study, life forms and attributes dominant in temperate semi-natural grasslands Central Himalaya, India, were assessed between January 2022 December 2022. This study was carried out three sites different forest zones, viz. oak, cypress pine. each site, plots measuring 0.5 hectares established assessments conducted plots. A total 50, 36, 49 herbaceous identified pine respectively, with categorized into five distinct classes. both oak hemicryptophytes emerged predominant form, whereas zone grasslands, it found chamaephytes take precedence. differences classifications ascribed to geographical distribution biotic interactions sites. exhibit comparable climatic conditions day lengths, resulting no significant variations soil temperature, light intensity or overall factors. majority commenced their flowering phase during monsoon season, attributed favorable characterized by warm, humid weather adequate moisture. Various events, including germination, growth, senescence, are significantly affected climate, timing subsequently influences ecosystem processes reciprocal manner. provides valuable foundational data for ecological environmental research, aiding comparison distinction compositions across Himalayas its ecosystems.

Language: Английский

Citations

0
Floristic composition and diversity in Lantana camara L. invaded forest zones of Kumaun Himalaya, India DOI
Charu Joshi, Vartika Joshi, Kiran Bargali

et al.

Vegetos, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Language: Английский

Citations

0
Effects of nitrogen and precipitation on the life history of spring- and autumn-germinated plants of Hypecoum erectum L. (Papaveraceae) DOI Creative Commons

Shanlin Yang,

Rongrong Cui,

Xueying Yang

et al.

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(5), P. e0321259 - e0321259

Published: May 9, 2025

Nitrogen deposition and precipitation are the topics of current global climate change, also major environmental factors influencing plant growth. This study utilized ephemeral H. erectum , which is distributed in Gurbantunggut Desert northwest China, as experimental material to analyze influence nitrogen water-nitrogen interaction treatment on phenology, survival rate, traits, biomass accumulation, seed dormancy spring- autumn-germinated plants. The research results indicate that increased increases rate There no significant impact phenological events. However, traits such leaf number, area, branch quantity, accumulation all reduced. During growth development process, more allocated reproductive organs, result production a large number non-dormant seeds. Therefore, arid semi-arid ecosystems, plays crucial role plants rapid reproduction offspring. After treatment, significantly increased. main phenology (leafing date, first flowering last fruiting date withering date) were delayed, extending life cycle Biomass organs with same allocation trend, produce dormant not only influences regulates their uptake, changes mechanisms adverse environments.

Language: Английский

Citations

0
Wisdom of the crowd: evidence for density-dependent species fitness in Hyptis suaveolens (L.) Poit. DOI Creative Commons

Kanhaiya Shah,

Gyan Prakash Sharma

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: May 14, 2025

Abstract Background Biological invasions pose severe threats to global biodiversity and human well-being. Invading populations often experience negative growth rates during the ‘lag phase’, leading Allee effects, a density-dependent phenomenon. effects reduce species fitness or plant performance due low-density populations. The rapid spread range expansion of an invader, Hyptis suaveolens (L.) Poit. has been reported have impacts on local in invaded regions Vindhyan highlands, India. present study examines varied population densities H. its vegetative trait performance, reproductive output, regulations. Understanding relationship between density modulation ability at fine coarse scales could help strategize for management. Methods was conducted habitats Population divided into low-, medium-, high-density groups. Plant assessed two scales—fine scale scale. traits, growth, output were estimated as traits (PlTs) patch (PaTs) plasticity response index (PI) also among three densities. Results showed that PlTs-vegetative such height, biomass, number seeds, significantly different across densities, with medium-density individuals showing maximum height biomass exhibiting higher seeds per plant. PaTs analysis revealed similar medium- populations, whereas low- PI values PlTs low, medium, high plastic responses, while exhibited low responses. Conclusions concludes exhibits As increases, grow more rapidly, resulting denser These can negatively impact recipient and, if left unchecked, seed production. suggests areas should be considered priority developing efficient cost-effective management strategies. emphasizes importance incorporating dynamics invasion studies predicting high-risk/priority strategizing invasive

Language: Английский

Citations

0