| Article Details : |
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| | | Article Name : | | | Distribution of Parthenium hysterophorus Linn and
its Impacts on Biodiversity in Nyando Sub-County,
Kisumu County, Kenya | | Author Name : | | | DORCA AUMA MURONO1, EMILY WABUYELE, PAUL K. MUORIA, JOHN OTIENO ABUTO | | Publisher : | | | Bridge Center | | Article URL : |  | | | Abstract : | | | Parthenium hysterophorus Linn has been classified as one of
the world’s most serious invasive plants. The weed threatens natural
and agro-ecosystems in over 30 countries worldwide. Parthenium
hysterophorus is a hazardous weed which causes harm to biodiversity,
natural plant ecosystems, humans and livestock. In Kenya, the weed
was first reported in the early 1970s and has since spread to several
parts of the country. Currently, there is no study on the detailed
distribution of P. hysterophorus and its impacts on biodiversity in
Kenya. Thus, the aim of this study was to evaluate the extent of
invasion and impacts of P. hysterophorus on plant species diversity in
Nyando Sub-County of Kisumu County. GPS data on the presence of P.
hysterophorus was loaded into ArcGPS 9.1 software to develop point distribution map. Fifteen transects were randomly established and
vegetation surveys conducted. One-way ANOVA was used to determine
significant differences in the mean values of vegetation variable data
(richness, diversity and density) among various land use types (p ?
0.05). The effects of P. hysterophorus density on species diversity,
richness and density of other herbaceous plant species were evaluated
by correlation and linear regression analyses. There was a negative
correlation between the density of the weed and species diversity (r = -
0.075, p = 0.029) and richness (r = -0.924, p = 0.001). This shows that
where P. hysterophorus density was high, species diversity, and
richness was low. Therefore, there is need for increased awareness of P.
hysterophorus, its impacts and possible solutions among the local
people and relevant stakeholders. Appropriate measures should be
taken to control this weed in Kenya. | | Keywords : | | | Parthenium hysterophorus, invasive plants, distribution,
diversity, richness, density.
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