Volume of your aquarium: 200 L
水族箱容积：200 升
Dimensions of your aquarium: 90x50x45 cm
水族箱尺寸：90x50x45 厘米
List of fishes: Paracheirodon Axelrodi, Hemigrammus bleheri
鱼类名录：Paracheirodon axelrodi、Hemigrammus bleheri
List of plants: N/A 植物名录：无
Description of Decorations and Substrate: Sand with a granulation of 0,1-0,5 mm; Roots (the roots and branches I used are roots from various trees that were brought by the nearby river. They were washed and cleaned well.) I also used magnolia and oak leaves.
装饰与底床描述：使用粒径为 0.1-0.5 毫米的细沙；沉木（所用树根与枝条来自附近河流冲刷而来的多种树木，已彻底清洗并清理干净）。此外还使用了木兰叶和橡树叶。
Description of Equipment: Filter Tetratec ex1200 l/h; Lamp Life Aqua Prime 900, Heater 300w
设备描述：过滤器采用 Tetratec ex1200（流量 1200 升/小时）；灯具为 Life Aqua Prime 900；加热棒功率 300 瓦。
Water Parameters: PH 6, GH 4, kh 2
水质参数：pH 6，GH 4，KH 2。
Additional Info: I change the water once a week, about 30%, without touching the substrate. I use osmosis water to ensure the balance of water parameters, there are plenty of dead wood and leaves in the aquarium; they can control well the fluctuation of the pH value.
补充说明：每周换水一次，换水量约 30%，换水时不扰动底床。使用反渗透水以维持水质参数稳定；缸内放置了大量沉木与落叶，可有效缓冲 pH 值的波动。
Description of the Area Surrounding the Biotope: Rio Negro is the second largest river in South America with many river tributaries that eventually end up with smaller forest streams. One of these forest streams is Igarapé do Daracua in Brazil and is named after the village of Daracua, which is located near Barcelos.
生物群落周边环境描述：内格罗河是南美洲第二大河，拥有众多支流，这些支流最终汇入更小的森林溪流。其中一条名为达鲁阿溪（Igarapé do Daracua），位于巴西，以邻近巴塞罗斯的达鲁阿村命名。
Village Daracua is located in an inaccessible place in the depths of the Amazon rainforest, and it is easiest to get to it by boat.
达鲁阿村地处亚马逊雨林深处，交通不便，乘船前往最为便捷。
Description of the Underwater Landscape of the Biotope: During the rainy season the water level rises and is poured into the surrounding forest. This is a time of abundance, because the fish migrate into the submerged forest where abundant food sources are found and the breeding begins. Forests represent a major source of plankton and other natural foods necessary for young fish, as well as for adult ones. Other than providing natural food for fish, forests provide them with the shelter from predators and create the shadow above water, thereby preventing overheating and even excessive drying during the dry season. The soil is sandy and with almost no mineral content. A large amount of leaf litter forms a dense carpet, along with the roots of the flooded forest and branches. Water carries a large amount of detritus. Detritus contains decomposing organic matter, including animal remains, plant residues.
生物群落的水下景观描述：在雨季，水位上涨并涌入周围的森林。这是一个丰饶的时期，因为鱼类会迁徙到被淹没的森林中，那里有丰富的食物来源，繁殖也随之开始。森林是浮游生物和其他天然食物的主要来源，这些食物对幼鱼和成鱼都至关重要。除了为鱼类提供天然食物外，森林还为它们提供了躲避捕食者的庇护所，并在水面上形成遮荫，从而防止水温过高，甚至在旱季避免过度干涸。土壤为沙质，几乎不含矿物质。大量的落叶层与泛滥森林的树根和树枝一起，形成了致密的覆盖层。水中携带大量碎屑，其中包含正在分解的有机物质，包括动物残骸和植物残留物。
Description of the Habitat Parameters: During the rainy season (starts in September and ends in May) the water is considerably colder and temperature is about 23 °C, water pH is about 6ph. During the dry season (starts around 29th of May and ends in September), the water level is reduced and warmer, the temperature of water is around 28-30°C. Due to the low water level and the large number of leaves and branches, the water contains a large concentration of tannins, which adds a dark color like “Tea color” and the water pH is low, about 3-4ph.
栖息地参数描述：在雨季（始于 9 月，止于 5 月），水温明显较低，约为 23°C，pH 值约为 6。在旱季（大约从 5 月 29 日开始，至 9 月结束），水位下降且水温升高，水温约为 28-30°C。由于水位较低以及大量落叶和树枝的存在，水中含有高浓度的单宁酸，使水呈现如“茶色”般的深暗色泽，同时 pH 值极低，约为 3-4。
List of Fishes and Invertebrates Occurring in the Nature Biotope: Crenuchus spilurus, Nanostomus eques, Poecilocharax weitzmani, Liosomadoras oncinus, Dicrossus filamentosus, Crenicichla notophthalmus, Mesonauta festivus, Acarichthys heckelii, Crenicichla marmorata, Heros notatus.
自然生境中出现的鱼类和无脊椎动物名录：Crenuchus spilurus、Nanostomus eques、Poecilocharax weitzmani、Liosomadoras oncinus、Dicrossus filamentosus、Crenicichla notophthalmus、Mesonauta festivus、Acarichthys heckelii、Crenicichla marmorata、Heros notatus。
List of Plants Found in the Nature Biotope: There are no aquatic plants found in the environment I have described, only some terrestrial plants submerged by the rainy season.
自然生境中发现的植物名录：在我所描述的环境中未发现水生植物，仅有部分因雨季淹没而处于水下的陆生植物。
Threats to the Ecology of the Biotope: The Amazon rainforest, besides having a great impact on the biotope, has also an impact on the overall climate of the Earth. About 20% of Amazon is already deforested; Between 1985 and 2015, Brazil lost almost 70 million hectares of native vegetation.
该生物群落生态面临的威胁：亚马逊雨林不仅对该生物群落产生重大影响，也对全球气候造成影响。目前约 20% 的亚马逊地区已被砍伐；1985 年至 2015 年间，巴西失去了近 7000 万公顷的原生植被。
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