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Biodiversity in agricultural and food systems of jhum landscape in the West Garo Hills, North-eastern India.

ABSTRACT: Jhum is a swidden agriculture agroforestry system indigenous to India. It enriches crop diversity and dietary diversity, helping to ensure food security and nutrition. However, jhum is now being rapidly abandoned in favour of intensive agriculture, often involving monoculture. Such changes in land use are a major threat to local food security. Based on a survey of 97 households in four villages of the West Garo Hills in the state of Meghalaya in north-eastern India, jhum and the corresponding food diversity (as maintained by the Garo indigenous communities) were examined. We used a mixed-methods approach to quantify the contribution to dietary diversity, and food and nutritional security. The jhum system of farming comprised of 39 crops and four indigenous breeds of livestock, which were categorized into five core food groups that sustain nutritional security and the food culture of indigenous people. The traditional food basket is supplemented with wild edible plants collected from fringes of forest and jhum fallows that are part of the system. The traditional foods of Garo communities, that are drawn almost entirely from locally available sources, are a significant part of local culture, and serve to reinforce conservation of biodiversity. The traditional food diversity guarded by indigenous people can serve as a basis for designing and implementing public policies aimed at ensuring food security of those regions that practise such systems, and more widely. Given this close interdependence between agrobiodiversity, culture, and livelihoods prevailing in the community, the present study recommended for keeping some area under traditional land use, supplemented with fresh measures to ensure its economic viability.

Supplementary information

The online version contains supplementary material available at 10.1007/s12571-021-01251-y.

SUBMITTER: Pandey DK

PROVIDER: S-EPMC8761519 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BACKGROUND: Molecular techniques have facilitated the studies on genetic diversity of Plasmodium species particularly from field isolates collected directly from patients. The msp-1 and msp-2 are highly polymorphic markers and the large allelic polymorphism has been reported in the block 2 of the msp-1 gene and the central repetitive domain (block3) of the msp-2 gene. Families differing in nucleotide sequences and in number of repetitive sequences (length variation) were used for genotyping purposes. As limited reports are available on the genetic diversity existing among Plasmodium falciparum population of India, this report evaluates the extent of genetic diversity in the field isolates of P. falciparum in eastern and north-eastern regions of India. METHODS: A study was designed to assess the diversity of msp-1 and msp-2 among the field isolates from India using allele specific nested PCR assays and sequence analysis. Field isolates were collected from five sites distributed in three states namely, Assam, West Bengal and Orissa. RESULTS: P. falciparum isolates of the study sites are highly diverse in respect of length as well as sequence motifs with prevalence of all the reported allelic families of msp-1 and msp-2. Prevalence of identical allelic composition as well as high level of sequence identity of alleles suggest a considerable amount of gene flow between the P. falciparum populations of different states. A comparatively higher proportion of multiclonal isolates as well as multiplicity of infection (MOI) was observed among isolates of highly malarious districts Karbi Anglong (Assam) and Sundergarh (Orissa). In all the five sites, R033 family of msp-1 was observed to be monomorphic with an allele size of 150/160 bp. The observed 80-90% sequence identity of Indian isolates with data of other regions suggests that Indian P. falciparum population is a mixture of different strains. CONCLUSION: The present study shows that the field isolates of eastern and north-eastern regions of India are highly diverse in respect of msp-1 (block 2) and msp-2 (central repeat region, block 3). As expected Indian isolates present a picture of diversity closer to southeast Asia, Papua New Guinea and Latin American countries, regions with low to meso-endemicity of malaria in comparison to African regions of hyper- to holo-endemicity.

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Biodiversity in agricultural and food systems of jhum landscape in the West Garo Hills, North-eastern India.

Supplementary information

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