Publications by authors named "Marc J J Janssens"
Rapid assessment methods of resilience for natural and agricultural systems.
An Acad Bras Cienc
December 2010
The resilience, ecological function and quality of both agricultural and natural systems were evaluated in the mountainous region of the Atlantic Rain Forest of Rio de Janeiro through Rapid Assessment Methods. For this goal new indicators were proposed, such as eco-volume, eco-height, bio-volume, volume efficiency, and resilience index. The following agricultural and natural systems have been compared according: (i) vegetables (leaf, fruit and mixed); (ii) citrus; (iii) ecological system; (iv) cattle, (v) silvo-pastoral system, (vi) forest fragment and (vii) forest in regeneration stage (1, 2 and 3 years old).
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- Sweet potato cultivars react differently to higher ozone levels, impacting their suitability for farming.
- The first cultivar prioritized leaf growth over tuber development, reducing starch content in leaves but maintaining carotenoid levels.
- The second cultivar kept tuber-to-plant ratio stable under ozone, but had lower tuber yield and starch content, which affects industrial use, though this may benefit chip production.