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Cited by 74Geography and Environmental StudiesHydrology and Sediment Transport ProcessesSoil erosion and sediment transport

Stream-valley systems of the Brazilian Cerrado: Impact assessment and conservation scheme

Wantzen, Karl M., Siqueira, Alberto, Cunha, Cátia Nunes da, Pereira de Sá, Maria de Fátima·2006·Aquatic Conservation: Marine and Freshwater Ecosystems
DOI 10.1002/aqc.807
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Abstract

1. The Cerrado, a seasonal savanna vegetation, is one of the largest biomes in the Neotropics. Conversion of Cerrado into agroecosystems has caused severe alterations in the species composition, functioning and habitat structure of streams and rivers. 2. As a case study for the Cerrado, the environmental quality of stream-valley systems was investigated in the catchment of the Tenente Amaral River near the city of Jaciara, Mato Grosso, Brazil. 3. Interpreting a Landsat-7 image of the area, and using a rapid assessment protocol with airborne and field observations, 481 first-order streams were identified in the catchment area (875.36 km2), equivalent to an average of 0.55 springs per square kilometre. The total stream density was 0.83 km km−2. 4. Only the uppermost headwater zones of the streams were unimpaired (8.5% of the stream channels). The largest part of the studied stream sectors were moderately (59.3%) or strongly (32.2%) impaired. 5. The greatest impact was caused by erosion. Sediments released by gully erosion alone were calculated as 2.6 × 106 m3 of sediments in the upper zone of one tributary of the Tenente Amaral River. The sediments had deleterious effects on fauna and flora. 6. The highly erosion-prone stream valleys in the Cerrado require full protection. In the transition area between agroecosystems and hillslopes, buffer zones consisting of a replanted interfluvial Cerrado tree vegetation and a vegetated buffer strip should be planted. Apart from erosion protection, these strips can provide valuable income for the farmers through selling non-wood products. 7. The legal situation providing the baseline for the protection of the Cerrado streams is reviewed, including the efforts of the Brazilian states and collaboration of UNESCO. 8. We suggest that it is possible to transfer this management strategy to similar biomes in the seasonal tropics provided that the tree species lists are carefully adapted to the regional flora. Copyright © 2006 John Wiley & Sons, Ltd.

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  • 30 slum areas, houses of 750 families in risk areas by the Barigui river margins, and over 100 illegal settlements in existing reserves were demolished and relocated for conformity with Brazilian legislation protecting river and lake margins.

    “30 slum areas, and houses of 750 families that inhabit risk areas by the Barigui river margins and over 100 illegal settlements in existing reserves have been demolished and relocated for conformity with the Brazilian legislation that protects river and lake margins (so-called 'permanently protected areas', area de proteção permanente, or APPs [177]).”

    From Urban Stream and Wetland Restoration in the Global South—A DPSIR Analysis (2019) · cites this paper as [177]

  • Enforcement of existing laws, protection of riparian forests and headwater swamps, maintenance of environmental flows, public decision to keep parts of the river continuum entirely free of dams, and the principle of espace de liberté can solve large parts of the rural problem.

    “Very often, enforcement of existing laws (e.g., the Brazilian Forest Code, [54]), protection of riparian forests and headwater swamps [177], maintenance of environmental flows [87], and the public decision to keep parts of the river continuum entirely free of dams (e.g., [10]), and the principle of “espace de liberté” (space for river dynamics), can solve a large parts of the rural problem.”

    From Urban Stream and Wetland Restoration in the Global South—A DPSIR Analysis (2019) · cites this paper as [177]

  • The Brazilian Forest Code considers that a riparian zone of 50-100 m beside each stream needs to be protected.

    “For example, the Brazilian Forest Code (Codigo Florestal) considers that a riparian zone of 50-100 m aside each stream [177] need to be protected.”

    From Urban Stream and Wetland Restoration in the Global South—A DPSIR Analysis (2019) · cites this paper as [177]

  • A large part of the solutions for siltation must be found in headwater regions rather than in the cities themselves.

    “Here, too, a large part of the solutions must be found rather in the headwater regions than in the cities themselves (e.g., Wantzen et al. [177]).”

    From Urban Stream and Wetland Restoration in the Global South—A DPSIR Analysis (2019) · cites this paper as [177]

  • Due to intensive and still increasing agricultural and mining activity and inefficient erosion control in the Global South, siltation problems are ubiquitous in urban streams and lakes.

    “Due to an intensive (and still increasing) agricultural and mining activity, and inefficient erosion control in the Global South, siltation problems are ubiquitous in urban streams and lakes.”

    From Urban Stream and Wetland Restoration in the Global South—A DPSIR Analysis (2019) · cites this paper as [177]

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Authors
Wantzen, K. M., Siqueira, A., Cunha, C. N. D., & Pereira de Sá, M. D. F.
Affiliations
Max Planck Society (DE)
Corresponding author
Wantzen, Karl M.
ORCID
Venue
Aquatic Conservation: Marine and Freshwater Ecosystems
Publisher
Wiley
Published
2006-10-25
Volume
16
Issue
7
Pages
713-732
ISSN
  • 1052-7613 (ISSN-L)
  • 1099-0755
DOI
10.1002/aqc.807
OpenAlex
W2084829775
Cited by
74
References
31
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 6 · 2022: 2 · 2021: 2 · 2020: 6 · 2019: 2 · 2018: 2 · 2017: 3 · 2016: 7 · 2015: 1 · 2014: 9 · 2013: 2 · 2012: 4
FWCI
5.01
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
  • Aquatic Conservation Marine and Freshwater Ecosystems (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Geography and Environmental Studies
  • Physical Sciences › Environmental Science › Ecology › Hydrology and Sediment Transport Processes
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
Keywords
Cerrado, stream impairment, gully erosion, sedimentation, riparian buffers, non-wood products, stream conservation, environmental impact assessment, Mato Grosso

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