Recuperação em área de empréstimo usada para construção de usina hidrelétrica

Alves, Marlene Cristina; Nascimento, Vagner do; Souza, Zigomar Menezes de

doi:10.1590/s1415-43662012000800011

Cited by 17 publications

(11 citation statements)

References 21 publications

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“…Previously, surface soil removal of approximately 8.6 m of the original soil profile for constructing the foundation of the dam of the hydropower plant from Ilha Solteira effectively eliminated the native vegetation of a massive area in this region (Alves, Nascimento, & Souza, 2012; Teixeira et al., 2019). The area was vastly colonized by green algae and bryophytes, but taller plants were still scarce and patchy, which may suggest that nutrients and/or water limitation hamper ecological succession in the studied area.…”

Section: Methodsmentioning

confidence: 99%

Boron application increases growth of Brazilian Cerrado grasses

Lannes

Venterink

Leite

et al. 2020

Ecology and Evolution

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Nutrients are known to limit productivity of plant communities around the world. In the Brazilian Cerrado, indirect evidences point to phosphorus as the main limiting nutrient, but some fertilization experiments suggest that one or more micronutrients might play this role. Boron is one of the essential micronutrients for plants. Agronomically, it received some attention, but it has mostly been neglected in ecological studies assessing the effects of nutrients on plant growth. Through field fertilization and mesocosm experiments in a degraded area in the Cerrado, we show that boron addition increased biomass production of herbaceous vegetation. This could be related to a lower aluminum uptake in the boron fertilized plants. Even considering that plant growth was promoted by boron addition due to aluminum toxicity alleviation, this is the first study reporting boron limitation in natural, noncultivated plant communities and also the first report of this kind in vegetative grasses. These results contribute to disentangling patterns of nutrient limitation among plant species of the species‐rich, aluminum‐rich, and nutrient‐poor Cerrado biome and highlight the potential role of micronutrients, such as boron, for growth of noncrop plants. Understanding how nutrient limitation differs among functional groups in the highly biodiverse areas founded on ancient tropical soils may help managing these plant communities in a changing world.

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Section: Methodsmentioning

confidence: 99%

Boron application increases growth of Brazilian Cerrado grasses

Lannes

Venterink

Leite

et al. 2020

Ecology and Evolution

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“…The areas that provide these materials are commonly known as quarries and borrow pits, normally located in the region surrounding the project area [ 11 – 13 ]. In the case of borrow pits for the removal of clays, in addition to the elimination of vegetation, part or all of the surface horizons of the soil are also removed, sometimes exposing the C horizon [ 12 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream

et al. 2021

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Construction of dams for hydroelectric power requires significant quantities of soil and rock, which are often extracted in borrow pits from adjacent regions. Although the effects of dams on stream processes has received significant attention, the effects of borrow pits has not. The main objective of this study was to analyze the geomorphological and sedimentological aspects of two second-order streams, one of which was directly affected by the borrow pit located upstream of its source (Pedra Branca stream). Flow rates were measured and cross-sections of 600m stretches in both streams were monitored over a hydrological year. At the same time, sediments from the bed of the channels and soils on their banks had their physical and chemical characteristics evaluated. Streams sediments differed in their chemical and organic matter composition. The mean particle size of the sediment particles was different between the reference and degraded streams. The water flow was very similar to both streams, only varying along the seasonal seasons. However, the fluvial channels presented great geomorphological differentiation, mainly downstream, due to the location of the Pedra Branca stream and its proximity to the borrow pit. Despite the great importance for the production of clean electric energy, the construction of hydroelectric plants promotes persistent impacts that affect structural and functional aspects of the adjacent aquatic habitats. Borrow pits used for the construction of projects become large sources of sediment for aquatic environments, affecting the drainage network of the hydrographic basin and the balance of river erosion, transport and deposition processes. The results show the need to review the intervention protocols in borrow pits and the environmental legislation that regulates their rehabilitation.

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“…For Brazilian animals and plant communities there is a knowledge gap concerning the effect of manure additions and of their diversified nutrient contents on plant growth. The Brazilian Cerrado is a biodiversity hotspot (MYERS et al, 2000) undergoing several threats due to agricultural and industrial expansion and in need of development of techniques aiding the recuperation of the degraded areas in this biome (ALVES et al, 2012). Recently, Teixeira et al (2019) showed that the addition of sheep manure in a degraded area in the Cerrado promoted soil nutrient enrichment and further helped plant establishment, suggesting that this practice can be successfully applied as a natural organic source of nutrients to the soil.…”

Section: Introductionmentioning

confidence: 99%

Effects of animal manure upon growth of Cerrado plants

Ferreira

Viñales

Silva

et al. 2020

RICA

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Through excretion, animals return to the soil part of the nutrients they ingest. This input can be an alternative to artificial inorganic fertilization aiming at increasing soil nutrient concentrations in degraded areas that are prone to restoration. In nutrient-poor soils, the addition of animal manure can promote increases in soil fertility, but studies assessing its effects upon plant communities are meager. This study aims at checking whether the addition of manure originated from livestock promotes plant growth increase and enzyme activity in Cerrado native plants of different functional groups as a way to subsidize processes of environmental recuperation in degraded areas using organic fertilization of an easily available source, as animal manure. The experiment was conducted in a screenhouse through a completely randomized design with four manure and six species treatments with three replicates. Manure treatments used were control, cattle, sheep and goat manure. The plant species selected belonged to main Cerrado herbaceous functional groups – two naturalized grasses, two alien invasive grasses, a legume herb and a Malvaceae herb. Phosphorus and nitrogen concentrations, and N:P ratios varied according to the type of manure. Soil organic matter content, phosphorus and potassium concentrations increased upon manure addition. Different manure types promoted various effects in height, biomass and acid phosphatase activity amongst the plants. Goat and cattle manure positively influenced Urochloa decumbens, an exotic invasive grass living in the Cerrado, whereas sheep manure addition promoted increase of non-invasive grasses. These results show that animal manure can promote better nutrient conditions for plants living in degraded areas, but the selection of the manure type for application in restoration projects aiming at aiding plant growth in Cerrado degraded areas will depend on the purpose of the project because different dung types benefit different plant functional groups.

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Recuperação em área de empréstimo usada para construção de usina hidrelétrica

Cited by 17 publications

References 21 publications

Boron application increases growth of Brazilian Cerrado grasses

Boron application increases growth of Brazilian Cerrado grasses

Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream

Effects of animal manure upon growth of Cerrado plants

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