Classification and Ordination Methods as a Tool for Analyzing of Plant Communities

Chahouki, Mohammad Ali Zare

doi:10.5772/54101

Cited by 14 publications

(11 citation statements)

References 53 publications

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“…PAST was used to analyse rodent habitat association. The Bray-Curtis similarity index and Correspondence Analysis (CA) (Chahouki & Zare 2012), were used to analyse rodent habitat association at both habitat and grid level. When conducting the CA, rare species were excluded.…”

Section: Data Collection and Analysismentioning

confidence: 99%

Rodent species composition, relative abundance, and habitat association in the Mabira Central Forest Reserve, Uganda

Ssuuna

Makundi²,

Isabirye

et al. 2020

Journal of Vertebrate Biology

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Section: Data Collection and Analysismentioning

confidence: 99%

Rodent species composition, relative abundance, and habitat association in the Mabira Central Forest Reserve, Uganda

Ssuuna

Makundi²,

Isabirye

et al. 2020

Journal of Vertebrate Biology

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“…NMDS is an indirect ordination technique and an iterative method of sorting and, summarizing the multivariate relationships among sites. Environmental variables that were not significant contributors to explain the vegetation patterns were excluded from the final diagram (Chahouki 2013). In addition, Spearman's correlation analysis was used to evaluate the relationship between the stronger environmental variables identified by the NMDS and percentage exotic plants at each site.…”

Section: Discussionmentioning

confidence: 99%

Environmental factors affecting the success of exotic plant invasion in a wildland-urban ecotone in temperate South America

Nievas¹,

Calderón²,

Moglia³

2019

NBC

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Urbanization is one of the main causes driving changes in biodiversity patterns and it is regarded as a major threat to native biota. Successful exotic plant invasion depends on invasiveness and invasibility. Invasiveness is related to the characteristics of exotic plants and invasibility to the features of the sites. The objective of this study was to identify the invasibility environmental factors affecting the success of exotic plant invasion in a wildland-urban ecotone of the central region of Argentina (Potrero de los Funes Village, San Luis). Fifty phytosociological inventories were recorded in an area of 700 ha during spring and summer seasons (2013–2015). Abundance-coverage values of plants and environmental variables such as soil characteristics, anthropogenic disturbance, and altitude of the sites were assessed. Soil moisture, electrical conductivity (EC), acidity (pH), organic matter content, and nitrates were determined as part of the soil analysis. A Nonmetric Multidimensional Scaling analysis was used to identify the possible relationship between abundance-coverage of the vegetation and environmental variables. Abundance-coverage of exotic plants was positively influenced by anthropogenic disturbance and nitrate levels, and negatively affected by altitude. However, no significant correlation was found between percentage of exotic plants and pH, EC, or soil moisture. Thus, urbanization and touristic activities influenced the success of exotic plant invasion.

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“…We used data from 25 surveyed fields and plantations in the analysis; because we only had presence/ absence data, we used the Jaccard index as a distance measure. The NMDS is a non-parametric multivariate ordering technique that is based on the rankings of distances between points (Chahouki, 2012). In addition, we calculated the proportion of the samples that each weed species represented and examined whether it is exclusive to any crop or bioclimatic zone of the state.…”

Section: Methodsmentioning

confidence: 99%

Weeds of commercial crops in Colima, Mexico

et al. 2021

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Weeds are plants adapted to habitats modified by people and that often interfere with different human activities. These plants constitute an economically and ecologically relevant group because of their implications for agriculture. Because the agrestal weeds of the state of Colima, Mexico have been poorly documented, we surveyed these plants in commercial agricultural fields and plantations of the state, from February 2015 through May 2019. We surveyed 25 sites, each of about 1 ha, dedicated to cash-crops (blueberry, blackberry, coffee, maize, onion, jalapeño pepper, papaya, Mexican lime, and sugarcane). We found 222 weedy species (43 eudicots, 6 monocots, 2 magnoliids, 1 fern, and 1 liverwort), belonging to 53 families. The most species-rich families were Poaceae (29 species) and Asteraceae (25). A high percent of the weed flora was native (84.2%) and 15.8% alien. The most common species were Euphorbia hirta and Heliotropium procumbens. We found 21 endemic species and Manihot chlorosticta in the near threatened (NT) risk category of the IUCN. Also, we found that each crop tends to have a distinctive weed community, which in general appears to be determined by bioclimatic factors, principally temperature and precipitation.

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Classification and Ordination Methods as a Tool for Analyzing of Plant Communities

Cited by 14 publications

References 53 publications

Rodent species composition, relative abundance, and habitat association in the Mabira Central Forest Reserve, Uganda

Rodent species composition, relative abundance, and habitat association in the Mabira Central Forest Reserve, Uganda

Environmental factors affecting the success of exotic plant invasion in a wildland-urban ecotone in temperate South America

Weeds of commercial crops in Colima, Mexico

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