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Table 1 Criteria used to define the values of vulnerability of Agave species according to socio-cultural, economic, ecological, and biological indicators

From: Vulnerability and risk management of Agave species in the Tehuacán Valley, México

Variable Criterion Value
Useful part Use of dead plant parts 0
Use of vegetative parts (leaves, fiber, spines) 1
Use of sap and reproductive parts (flower buds, inflorescences 2
Use of the entire plant 3
Management Cultivated, domesticated, and introduced species (no wild populations occurring in the region) 0
Wild native species cultivated ex-situ by seeds 1
Wild native species cultivated ex situ through vegetative propagules 2
Wild native species tolerated and protected in situ in modified originally natural areas 3
Wild native species under simple gathering of vegetative parts (leaves) and vegetative sprouts. 4
Wild native species under simple gathering of reproductive parts (flowers and inflorescences) and entire individual plants before sexual reproduction 5
Demand in markets Not interchanged in markets 0
Commercialized or bartered in markets 1
Ecological status Cultivated introduced species 1
Wild and cultivated species 2
Only wild populations 3
Propagation Seeds, caespitose and rhizomatous suckers and/or bulbils 1
Seeds and multiannual rhizomatous suckers 2
Seeds and low production of early rhizomatous suckers 3
Seeds and axilar suckers 4
Exclusively seeds 5
Distribution in regional vegetation types Occurring in five or more vegetation types 1
Occurring in four regional vegetation types 2
Occurring in three regional vegetation types 3
Occurring in two regional vegetation types 4
Occurring in one single regional vegetation type 5
Distribution in other regions of Mexico Cultivated broadly distributed species 0
Occurring in more than six states of Mexico 1
Occurring in two to five states of Mexico 2
  Endemic to the region 3