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TRANSCRIPT
Threats to and Conservation of Wetland Environments
in the Pantanal
Keiichiro YOSHIDA (Yokohama National University, Japan)
- Japan-Brazil Symposium on Research Collaboration -
- Contents -
• The Pantanal – Location – Diversity – Human
• Threat to the Pantanal – Deforestation – Modifying the hydrological cycle – Sedimentation and flood regimes
• Negative effects of conservation – “arrombado”
• Comprehensive approach – Toward wetland conservation
PantanalBrazil
Brasilia
Sao Paulo
Atlantic
Pacific
Fig. Map of the Pantanal The gray-hatched area indicates the Brazil Pantanal.
Nhécolândia
Paiaguás
Cuiaba
Campo Grande
Corumba
baia
cerradão
cerrado
campo limpo
campo sujo
Fig. Vegetation types and water level in the Pantanal.
(Yoshida et al. 2006)
cerrado campo limpo campo sujo
• Cattle ranching – since 19th century
• Sustainable resource management
– natural grasslands used as pasture – practices for maintaining the grassland – control of the flood regime
• “wise use” of wetlands
Threats to the Pantanal
Threats to the Pantanal
Deforestation • The natural forests (cerrado and
cerradão) have been replaced by pasture for cattle ranching.
Threats to the Pantanal
Deforestation
Modifying the hydrology • The road crossing the Pantanal
changed the hydrological cycle.
Transpantaneira (147km)
←upstream downstream→
Threats to the Pantanal
Deforestation
Modifying the hydrology
Sedimentation • The river sedimentation changed
the flood regime in Taquari basin .
Rio Taquari
• Wetland conservation policies – Establishment of protected areas – Prevention of deforestation – Prohibition of flood control activities
Parque Nacional do Pantanal Matogrossense
Negative effect
of conservation policy
arrombado (“boca do caronal”)
• “arrombado” (“boca do rio”) – The natural levee breaks – Traditionally, the local inhabitants close them
to mitigate the flood damage.
• However, the closure of arrombado has been prohibited since the 1990s to “conserve the wetland ecosystem”
Nhécolândia
Paiaguás
Rio Taquari
arrombado
Nov 1987 Nov 1997
Table. Forest decline and tree species on the earth mounds (“capãoes” & “murundus” ) in the inundated area of Paiaguas.
decline class 1 decline class 3 decline class 5
Natural Resource Degradation
• forest decline • habitat loss • biodiversity reduction
Expansion of perennial inundation area
Prohibition of closure of “arrombado”
Social Problems
• farmland abandonment • Pantaneiro leaving the Pantanal • loss of traditional knowledge
How can we conserve the Pantanal?
• Loss of traditional wetland management systems – non-sustainable use of natural resources – conservation policies without concerning about the local
inhabitants
• Conservation of the human-influenced wetland – A comprehensive approach that integrates traditional
knowledge and modern science – Contribution to both wetland conservation and human well-
being
Decline of the traditional cattle ranching
Degradation of the wetland environments
Explore new relationships between human and nature in the Pantanal