Skip to main content

Table 4 Matrices used in the partial canonical ordination (CCA)

From: Ecological and socio-cultural factors influencing plant management in Náhuatl communities of the Tehuacán Valley, Mexico

Matrices

Variables

Description

Management Intensity (Response Matrix Y)

Life cycle

Annual or perennial.

Method of reproduction

Sexual, asexual or both.

Reproductive System

Mostly self-incompatible or Mostly self-compatible.

Maintenance Labours

Cleaning or weeding, grooves water penetration, apply fertilizer, fumigation, etc.

Artificial selection

If selection criteria are recognized by specific characteristic.

Collective regulation

Existence of rules governing access to the resource and how it is applied.

Using Tools

Types of tools used in resource extraction.

Proximity to site collects

Distance in meters from households to the extraction sites.

Time spent in collecting

Minutes, hours, and days.

Management types

Conditions of a plant’s management, whether gathered, tolerated, promoted, protected or cultivated.

Ecological (Matrix X)

Spatial distribution

Percentage of plots in which each species is present.

Temporal distribution

Harvested parts are available continuously throughout the year or only seasonally.

Lyfe cycle

Annual or perennial.

Reproductive System

Mostly self-incompatible or Mostly self-compatible.

Ecological Dominance Index

Value calculated from the frequency, biomass, coverage and density.

Usefulparts

Mostly vegetative parts, mostly reproductive parts or whole individuals.

Frecuency

Proportion of presence in the quadrants of each sampling.

Cover

Percentage of cover in three quadrants of 1m2 for annuals.

Biomass

Calculated from the hedges and the diameter at breast height for perennials.

Density

Number of individuals per hectare.

Sociocultural and economic (Matrix W)

Consumption

Number of people consuming any edible species considered in this study.

Frequency of use

Consumption over the year.

Last day of consumption

Days, weeks, months or years.

Uses

Number of uses that have a species.

Useful parts

Mostly vegetative parts, mostly reproductive parts or whole individuals.

NumberUsefulParts

Total number useful parts.

Commercialization

Local market presence.

Medicinal use

Medicinal use edible addition.

Average price

Average price of a plant species in all markets.

Sales Volume

Total sales volume in local market.

People who sell

People in the community who market some resource.