Studies indicate that in Pakistan 700 alien species are found, among these six species are considered to have extreme invasive nature, i.e. Sores on the tree’s trunk and leaf dieback (when the infection kills foliage farthest out first then moves inward) indicate an infected plant, according to the Center for Invasive Species Research. They said that Conocarpus plantation on a large scale in Karachi was not a well-thought-out action on part of the city district government, because the plant had properties that were damaging for local biodiversity. While speaking to , some senior botanists warned the authorities against planting of alien species on a large scale unless their impact on the environment was scientifically studied. Rashid, M., et al. In fact, it invaded every town and became dominant by eliminating natural vegetation, they said. Invasive plants could thrive in areas beyond their natural range of dispersal, as the species were hardy with high adaptability and reproductive capacity and could cause harm to environment and humans, he said. Originate from: Southeast Asia. Looks like you’ve clipped this slide to already. Many studies showed that certain functional traits of introduced plant species are associated with their ability to become invasive (e.g. Impact: Now growing invasively in most states, purple loosestrife can become the dominant plant species in wetlands.One plant can produce as many as 2 million wind-dispersed seeds per year and underground stems grow at a rate of 1 foot per year. The plains present a parkland view of scattered trees. N… Pistia stratiotes, Eichornia crassipes and Salvinia species were aquatic plants and now widely cover water bodies after destroying local vegetation. Reviewed by M. Farooq Ahmad (ZSD) 36 30 Table: 16.1 Invasive and Alien Species 37 31 Table: 16.2 Exotic Fish in Pakistan 40 32 Table: 17.1 List of Ramsar Wetland sites in Pakistan 41 The second worst threat is the biological invasion of alien species (Convention for. Sharing his opinion on the subject, Dr Ajmal Khan, who heads the Institute of Sustainable Halophyte Utilisation at Karachi University, said: “Invasive species might not be problematic in their native environment because of nature's controlling mechanism in specific ecological conditions that help maintain their population at a certain level. invasive alien flora of india c. sudhakar reddy, g. bagyanarayana, k.n. UsesMulberry leaves are the only source of food for silkworms. The toxic chemicals, he said, were found in all its parts except bean pods which were eaten by animals. J Ecol 104(4):957–968 CrossRef Google Scholar Ööpik M, Bunce RGB, Tischler M (2013) Horticultural markets promote alien species invasions: an Estonian case study of herbaceous perennials. Dawn. As part of this, teams ensured inclusiveness of rural women as major stakeholders due to… They are native to Pakistan and India and were imported to South Texas in the 1930’s. Text, images and maps give biological, ecological and geographical information. These are examples of alien invasive plant species which not only reduce land value and cause great loss to agricultural communities but were detected as a source of allergy as well. Plant traits associated with invasiveness. Invasive plant species of the world: A reference guide to environmental weeds. Nilgai consume mainly grass, but will also forage on forbs and will include all plant parts. Switzerland and the invasive plant species issue. A plant introduced with human help (intentionally or accidentally) to a new place or new type of habitat where it was not previously found. Nederlandse oecologische flora. The other alien invasive species harming local vegetation include Parthnium hysterophorus (found in the Punjab and Khyber-Pakhtunkhwa), Broussenetia papyrifera, salvinia and eucalyptus species.
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