Do Plants Have a Choice of Traits to Be Modulated? Evidence from an Invasive Plant Mikania micrantha Kunth in Different Urban Environments
| Autor: | Achyut Kumar Banerjee, Anjana Dewanji, Swayambhu Ghosh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
education.field_of_study
Phenotypic plasticity Biomass (ecology) Ecology fungi Population food and beverages 04 agricultural and veterinary sciences General Medicine 010501 environmental sciences Biology biology.organism_classification 01 natural sciences Invasive species Habitat Germination 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Biological dispersal education Mikania micrantha 0105 earth and related environmental sciences |
| Zdroj: | American Journal of Plant Sciences. :835-855 |
| ISSN: | 2158-2750 2158-2742 |
| DOI: | 10.4236/ajps.2017.84057 |
| Popis: | The successful establishment of an invasive plant in a novel environment has been attributed to the phenotypic plasticity of plant traits, with most studies focussing on vegetative trait plasticity in either experimental and/or natural habitat conditions. This study explores the role of phenotypic plasticity, in both vegetative and reproductive traits, of an invasive plant Mikania micrantha growing as a ground cover in diverse urban areas in the city of Kolkata, India. Quadrat based plant and soil sampling was conducted in three habitat types, namely roadsides, natural areas and abandoned plots, from four regions within the city. The above ground biomass and fitness related vegetative and seed traits were estimated from the plant samples whereas soil macro-and micro-nutrients as well as soil health (in terms of organic carbon and microbial biomass carbon) were estimated from the soil samples. Habitat-specific selection of traits in M. micrantha was observed in this study. In roadside population which has more chances of long distance dispersal, the excessive production of reproductive biomass as a compensatory response to the low germination ability of the seeds was evident. In natural areas which are more prone to anthropogenic disturbance and where the plant has greater chances of local spread, modulation of both vegetative (higher SLA) and reproductive traits (lighter seeds with faster germination ability) helped the plant to maintain its population. In abandoned plots where there was more number of associated species, the longer span of germination and increased population height ensured the survivability of M. micrantha in the community. Thus, a continuous monitoring program to check for M. micrantha growth should be prioritized in urban areas due to its immense trait plasticity in different habitat conditions where uncontrolled growth can lead to its establishment and spread, thereby making its control more difficult. |
| Databáze: | OpenAIRE |
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