#563: 300L Biotope Aquascape Forest Creek near Barcelus, Rio Negro Tributaries in Brazil

王鹏 本溪市, China


Be careful in your write up that it describes your biotope not en entire river system. An entire river the size of the Rio Negro is not a "Biotope". It is many MANY biotopes. The title of your scape is more accurate than your long description. But even there your tank looks more like a section of flooded forest than a creek.
— Karen Randall

Aquascape Details

Dimensions 120 × 50 × 50 cm
Title Forest Creek near Barcelus, Rio Negro Tributaries in Brazil
Volume 300L
Background Black stickers
Lighting Netlea/Nitley LED 6500K 50W×3 / Spotlight 5W×4
Heating device:
Filtration ATMAN-CF1200 External Filter ×2 / Pre-filter ×2
Degreasing Film Filter ×2
Plants Eichhornia crassipes and some algae
Animals Nannostomus eques / Paracheirodon axelrodi / Hemigrammus bleheri /Dicrossus filamentosus
Materials The materials I chose were collected in rivers, riverbanks and forest parks, and some of them were purchased.
Material includes drifting trees, branches, dried leaves (oak leaves), natural river sand, peat and coconut soil mixtures to simulate the bottom of forest streams.
Additional Information The Negro River, which means the Black River, is the largest tributary on the North Bank of the Amazon. Its source is the watershed between the Orinoco River and the Amazon River. It is connected with the Orinoco River by the Cassikiahre River. The Negro River is named the Guyana River in Colombia, its source, and its largest tributary is the Vopes River. The Negro River has a total length of 2252.6 km, a basin area of 620,000 square kilometers, an average annual discharge of 30,000 cubic meters per second, an average annual runoff depth of 1,600 mm and suspended mass concentration of 0.007/cubic meters. The largest tributary of the lower Negro River is the Broncou River, which originates from the Rofuma River at the junction of Brazil and Guyana, Brazil and Venezuela. Mountains (Roraima, 2772 m above sea level) are called Cotingo in the upstream of Zhengyuan and Surumu in the downstream. There are two main tributaries in the upper reaches of the Broncou River: the Takatu River and the Ireng River, both of which are the boundary between Brazil and Guyana and the Uraricoera River, which originate from the eastern slope of the Parima Mountains on the border between Brazil and Venezuela. The tributaries of the Takatu River include Auari, Parima, Uraricaa and Majari. The middle and lower tributaries are Mucajai, Ajarani, Anaua and Catrimani, etc. The whole length of the Bronchus River is 1470 km from the Urariquila River. It flows through northwest Brazil and southeast, accepting tributaries such as the Broncou River and pouring into the Amazon River 17 kilometers below Manaus. It's about 2000 kilometers long. The river is winding and winding. The lower reaches of the river are sandy bars with a width of 30-50 kilometers, similar to long lakes. It is navigable below Taproquala. Through the Negro and Cassikiares rivers, the Amazon and Orinoco rivers are interconnected. The watershed is hot and rainy with few people. Because of the humus in the marshes along the coast, the river is dark. One of the small tributaries is Igarap do Daracua, located near Barcelona in the depths of the Amazon rainforest. It is covered by rain and needs to be entered by boats. A large number of interlaced drifting trees and fallen leaves (close to dense trees) are accumulated underwater, and some mud flows into the river with the arrival of the rainy season.
The rainy season begins in September and ends in May. The temperature of water is about 22-24 degrees C. The PH:6, TDS:2 and DH:2 of water are measured. In the dry season, the water level decreases and the temperature rises from May to September, and the water temperature is about 28-30 degree C. Because of the low water level, there are a large number of leaves and branches at the bottom of the river. The water contains a lot of tannins. It dyes the water "brown". It is a black river. The PH value of the water is low, about 3.5-4ph, TDS:8, DH:4. The illumination is longer in summer and distinct in two seasons.
During the rainy season, the water level rises and floods into the surrounding forests. Some of the trees are underwater, and fish swim to parts of their native River habitats, completely covered by the canopy of the rainforest. These waters are sheltered by rainforest trees, and the underwater light is dark and distinct. Here, fish produce a lot of aggregation. There, abundant food sources were found and began to breed. Forests are the main source of natural food for juvenile and adult fish. The underwater environment also provides them with perfect habitats and shadows on the water surface to prevent overheating or even excessive drying during the dry season. The bottom bed is sandy, with a lot of drifting trees and fallen leaves and soil at the roots of flooded forests. Many branches are inserted into the water from the surface of the water, providing a good shelter for fish. No aquatic plants were found in the environment I described. Only some terrestrial plants were submerged during the rainy season. There were many Eichhornia crassipes and some duckweeds on the water. Water carries large amounts of debris, which contains decomposed organic matter.
Fishes include Crenuchus spilurus, Nanostomus eques, Poecilocharax weitzmani, Liosomadoras oncinus, Dicrossus filamentosus, Crenicichla notophthalmus, Mesonauta festivus, Acarichthys heckelii, Crenichla morata, Hernotos atus.In my aquarium, I used a lot of drifting trees, branches, dead leaves and some soil to simulate the underwater environment of forest streams in the rainy season. A large number of driftwood also provide a habitat for nitrifying bacteria. Eichhornia crassipes is a good choice. It can also purify water quality and shield light to simulate the natural environment of underwater habitats (dark and distinct). I used two larger external filters and two pre-filters for both physical filtration and nitrifying bacteria cultivation. I use pure water and a small amount of domestic water to mix to ensure the balance of GH/TDS values, because there are a lot of driftwood and dead leaves in the tank, they can control the fluctuation of PH values very well. It's easy for me to control algae growth by changing water and controlling light time. In daily maintenance, only changing water and cleaning the glass of fish tank. In the photos and videos, you can see that the fish are in excellent condition. They like the ecological environment I simulate very much, and I am very happy about it.
The impact on nature:
Because it was a dense forest stream, people could only reach it by boat, so he was not cut down and mined. But when it rains in the Amazon tropics closer to where humans live, their fate is unfortunate. The annual deforestation of forests has affected the lungs of the Earth. Global warming, deterioration of air quality, abnormal climate and frequent natural disasters. Nature is warning humans that if it continues, we may not have winter or summer in years to come. Please put down your logging tools and stop logging in the Amazon Tropical Rain. Rain shower is a surface biological community composed mainly of trees. It has rich species, complex structure and various functions. Occasionally, I saw a documentary film on TV. In the film, people used to cut down the trees of heaven at will for their own sake. So I decided to create one. In order to appeal to people to protect nature and continue our earth's artery.

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