Diversity and distribution of invasive alien plants along the altitudinal gradient in Darjiling Himalaya, India. By: S. Moktan & A. P. Das (original) (raw)
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A study was carried out to assess the phytosociology of the invasive alien plants along the altitudinal gradient in Darjiling Himalaya with information on family, growth form and nativity. A total of 66 invasive alien species belonging to 26 families have been recorded. The analysis revealed that most of the species were reported from American sub-continent. Majority of the species were found to be introduced unintentionally and the distribution was maximum towards the temperate zone. Proper management strategies are required to understand the invasion and colonization of these alien species in this region.
Invasive Alien Plants of Indian Himalayan Region—Diversity and Implication
American Journal of Plant Sciences, 2012
The present study deals with comprehensive list of Invasive alien plants of Indian Himalayan Region with background information on family, habit and nativity. A total of 190 invasive alien species under 112 genera, belonging to 47 families have been recorded. Among these, the dicotyledons represent by 40 families, 95 genera and 170 species; monocotyledons represent by 7 families, 17 genera and 20 species. The analysis of invasive species reveals that 18 species have been introduced intentionally, while the remaining species established unintentionally through trade. In terms of nativity, amongst 13 geographic regions, the majority of invasive plants reported from American continent (73%). While in life form analysis, the herbs (148 species) are dominant, followed by shrubs (19 species), Grass (11 species), Trees (4 species), sedges and climber (3 species each). Most of the invasive species are annual habit (63%). Apart from these, 90 species (47%) are being used by locals for medicinal purposes. A better planning is needed for early detection to control and reporting of infestations of spread of new and naturalized weeds to be monitored.
Invasive Alien Plants of Himachal Pradesh, India
The present paper deals with the invasive alien plants found in the state of Himachal Pradesh, India. A total number of 125 invasive alien species under 83 genera, belonging to 39 families have been recorded based on field observations, herbarium and literature consultation. Tropical American elements contribute 75% of alien species found in the state. Among the invasive, annuals comprise 63%, herbs constitute 79% and only four tree species recorded as invasive species. Invasive species based habitat shows that 44% of invasive species were most abundant in wasteland, while cultivated fields, roadsides and forests were preferred by 20, 16 and 9% species respectively. Among the invasive alien elements, 70 species (56%) are being used by local inhabitants for different medicinal uses. Early detection and monitoring of naturalized weeds are essential for better control.
Catalogue of invasive alien flora of India
The present study deals with comprehensive list of invasive alien species in the flora of India with background information on family, habit and nativity. Total 173 invasive alien species belonging to 117 genera under 44 families were documented. It was prepared based on history, species origin, species behavior and field observations. Literature and websites were consulted extensively for relevant publications. Almost 80% of the species were introduced from neotropics. Tropical America (74%) and Tropical Africa (11%) contribute maximum proportion to the invasive alien flora of India. Habit wise analysis shows herbaceous species share 151 species, followed by shrubs , climbers (5) and trees (3). A better planning is needed for early detection and reporting of infestations of spread of new and naturalized weeds to monitor and control.
Checklist of invasive alien species in CSIR-NBRI Botanic Garden, Lucknow, India
2015
The invasive alien species of CSIR-NBRI Botanic Garden are enumerated and their impact on the surrounding ecosystem are discussed. This study deals with the information on habit, nativity and family of plant species occurring in the area of study. A total of 103 invasive alien species under 86 genera and 36 families were recorded. Among these, the eudicotyledons represent 85 species, 69 genera and 32 families; monocotyledons represent 18 species, 17 genera and 4 families. In terms of nativity, species from Tropical America are the most dominant group with 34 species. In addition, based on life forms, herbs are dominant (88 species), followed by shrubs (8 species), climbers (4 species) and trees (3 species).
Diversity of invasive alien species in Pantnagar flora
2015
Biological diversity faces many threats throughout the world and one of the major threats is caused by invasion of alien species. The present study proves presence of 94 invasive alien species in flora of Pantnagar, Uttarakhand, India. These 94 invasive alien species (IAS) belong to 72 genera, under 33 families 85 species are dicotyledons while 9 species are monocotyledons. On the basis of their nativity maximum IAS have their sourced region as American continents (74), followed by Africa (8), Europe (5), Mediterranean (3) and Asia & Australia (2). The taxonomic analysis of IAS reveals dominance of Asteraceae with 18 spp. followed by Fabaceae, Amaranthaceae, Convolvulaceae, Malvaceae, Solanaceae, Poaceae etc. Among these, 78 IAS are herbs followed by shrubs (8), grasses (4), sedges (2), trees (1), and climber (1). Such a large number of invasive alien species in small area of Pantnagar, indicate miserable condition of natural vegetation.
2021
The Western Himalayas regions are one of the riches repositories of the plant diversity in India. The spread of invasive alien plant species across Himalayan range causes loss of biodiversity including species extinction and change in the ecosystem functioning. These exotic plant species differ from their native area, based on their requirements, mode of resource asset and consumption may lead to the change in the structure, profile of the soil as well as the nutrient content. This results in adverse impacts on the biodiversity and ecosystem. However, various studies have been performed in documenting the ecological impacts of invasive species but there is a lack of understanding in regards of their economic importance, medicinal values, and livelihood considerations and in assessment the risk on human health. Present paper showcased some invasive alien species which are common and becoming threat for the forest zones and alpine regions in the Western Himalayan states of India.
Alien Plant Invasions in India: Current Status and Management Challenges
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences, 2012
ABSTRACT Invasive species are a major driver of global environmental change contributing to the loss of biodiversity, altering of ecosystem structure and functioning, and affecting provision of ecosystem services worldwide, including in India. In view of globalization of Indian economy and consequential increase in international travel and trade, introduction, establishment and spread of alien species is likely to escalate in India with serious ecological and socio-economic consequences. A recent study has reported the occurrence of 1,599 alien plant species belonging to 841 genera in 161 families in India, and the alien flora thus represents 8.5 % of the total Indian vascular flora. While the taxonomic inventory of alien species represents the first important step, but more detailed studies on characterization of alien species on the basis of their stage of invasion, identification of potentially invasible habitats/ecosystems, detection of introduction pathways and vectors of alien species, assessment, mapping and monitoring of invasive species using modern geo-spatial technology such as hyperspectral remote sensing, impact assessment, containment, control and restoration are still lacking in India and hence impede effective management of plant invasions in the country. It is in this context that an integrated research and policy framework for the management of alien plant invasions in India is proposed.
Study of Invasive Plant Species Distribution in Warangal City, Telangana, India
2021
The invasive plant species are non-native organisms which invade natural habitats and destroy the indigenous flora. The invasion of alien plant species into various places is recognized as a major cause of loss of biodiversity, after habitat destruction. The aim of the present investigation is to study invasive flora of city of Warangal, Telangana with detailed study about their nativity, family, habit and distribution. A total of 97 species belonging to 72 genera of 30 families have been recorded as alien species. Among them about 63% are native to tropical America. Fabaceae is the dominant family with 13 species, followed by Asteraceae with 12 species, Convolvulaceae with 8 species, Amaranthaceae, Malvaceae, Solanaceae, Euphorbiaceae with 6 species each. Remaining families are represented by species less than 6. Habit wise analysis of invasive plant species showed that 75% species belongs to herbs, 9% belongs to shrubs, 3% trees, and 2% climbers. Mesosphaerum suaveolens, Partheniu...
Status of Invasive Alien Plant species in Dhankuta Municipality
Journal of research and development, 2023
Invasive alien species are plants, animals, pathogens and other organisms that are non-native to an ecosystem, and which may cause economic or environmental harm or adversely affect human health. At least 179 species of alien plant species are naturalized in Nepal and 26 of them have become invasive with negative impacts on environment and economy. Out of 26 invasive alien species four species are among the 100 of the world's worst invasive alien species. The present study intended to investigate the invasive alien plant species found in Dhankuta Municipality, which has not been explored previously. Present study reported 30 species of invasive alien plant species belong to 13 families of 28 genera. Agro-ecosystems accounted for 40% of the 30 species' IAPS, followed by grasslands and residential areas (31% each), and forests and shrubland (27% each).