On-Farm Agrobiodiversity Index
The on-farm agrobiodiversity index applies the mathematics of biological diversity — richness, evenness, and combined indices such as Shannon, Simpson and Margalef — to the crops, landraces, varieties and livestock breeds that farmers actually maintain in their fields and herds. Rather than counting wild species in an ecosystem, it quantifies cultivated and reared diversity: how many distinct crop species and varieties a farm grows, how evenly the area or production is spread across them, and how this compares between farms, communities and regions. Devra Jarvis and a large international team showed in 2008 that these measures of richness, evenness and divergence reveal substantial crop-variety diversity still maintained on farms worldwide and provide a sound basis for indicators of on-farm conservation. Built on Magurran's standard diversity formulas, the index turns agrobiodiversity into measurable, comparable numbers for research and policy.
Изворни запис
Цитирани радови су копирани дословно из изворног записа методе. Из њих се не изводи верификација на нивоу тврдње.
- Jarvis, D. I., Brown, A. H. D., Cuong, P. H., Collado-Panduro, L., Latournerie-Moreno, L., Gyawali, S., et al. (2008). A global perspective of the richness and evenness of traditional crop-variety diversity maintained by farming communities. Proceedings of the National Academy of Sciences, 105(14), 5326-5331. · DOI 10.1073/pnas.0800607105
- Magurran, A. E. (2004). Measuring Biological Diversity. Oxford: Blackwell Publishing. · ISBN 9780632056330
Куроване тврдње
Тврдње су сачуване у регистру доказа, свака са својом проценом.
Овај приказ не измишља процену тврдње када регистар нема ниједну.
Сродне методе
Генерисано из графа метода и приказано као машински предложене везе — не изводи се тврдња доказа.