Tropical Island

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Description

```yaml island_setting: name: "Unnamed Tropical Island" # Can be freely named by you size: "10 square kilometers, nearly circular in shape" traversal_time: cross_island: "Approximately 45 minutes (at a normal adult walking speed of 5 km/h in a straight line)" circumnavigate: "Approximately 2 hours and 15 minutes (to walk around the entire island along the coast or natural paths)" development: "All development on the island is entirely decided by you. Can establish a tribe, a nation, become the island lord, live as a lone castaway, or realize any imagined possibility." isolation: "There is no other land or trace of human activity within thousands of kilometers." island_geology: soil: "The island's soil is entirely alfisol(leached soil), yellowish-brown in color. The topsoil is relatively light, while the subsoil is heavy due to the accumulation of clay particles, forming a distinct clayey layer. It has strong water and fertilizer retention capacity, high base saturation, and above-average natural fertility, making it an excellent growing medium for the island's plants." bedrock: main: "The bedrock of the entire island is mainly siliceous rock, with basalt distributed in some areas." - "Siliceous rock are hard and dense (Mohs hardness 6.5–7), with extremely strong resistance to weathering. Their color depends mainly on the impurities they contain, and they are usually grayish-white, occasionally with grayish-green, red, or brown hues. Local exposures can easily create steep landforms." - "Basalt is mainly distributed in the stone forest area, ranging in color from dark gray to blackish-gray. It is fine-grained and dense, often exhibiting typical columnar jointing, and after weathering and erosion, it forms dense vertical ridges and walls." minerals: - "Copper and tin ores: Primarily concentrated in siliceous rock areas." - "Gold ore: Distributed in basalt areas, content increases with depth." - "Iron ore: Mainly found in the basalt-siliceous rock transition zone." - "Kaolin, gypsum, saltpeter, and bituminous coal: Primarily distributed in siliceous rock areas." island_environment: the_cycle_of_day_and_night: "Sunrise occurs between approximately 5:30 and 6:30 a.m., sunset between approximately 5:45 and 6:45 p.m., and nightfall(the end of astronomical twilight) between approximately 7:15 and 7:30 p.m. Day and night are of equal length throughout the year, with each day consisting of roughly 12 hours of daylight and 12 hours of night." climate: "Typical tropical maritime climate, characterized by mild temperature fluctuations and minimal daily and annual temperature variations. The climate is warm and humid year-round, with no cold spells or distinct winter, nor extreme heat waves; the seasons are distinguished almost entirely by rainfall patterns." temperature: "Between 24°C and 31°C" humidity: "Between 70% and 85%" seasons: rainy: "May to October, with monthly rainfall of 300–600 mm, frequent short heavy convective rains and afternoon thunderstorms." dry: "November to April, sunny and dry, occasionally affected by northeast trade winds." typhoon: "10–20% chance of being affected by the outer edges of typhoons from July to September." island_biomes: - name: "Rainforest" location: "Most of the island's inland areas" description: "Dense vegetation with rich layering and extremely high biodiversity." characteristic_plants: ["Palm trees", "Rubber trees", "Mahogany", "Bamboo", "Cocoa trees", "Banana trees", "Mango trees", "Durian trees", "Papaya trees", "Wild pineapple", "Wild ginger", "Taro"] characteristic_animals: ["Wild goats", "Wild rabbits", "Pheasants", "Macaws", "Hornbills", "Sunbirds", "Green tree pythons", "Fireflies"] - name: "Stone Forest / Columnar Joint Landscape" location: "Central-southern part of the island" description: "The unique stone forest landform, developed from volcanic basalt, features highly developed columnar joints in the basalt. Dense, vertical ridges and walls, averaging 2-3.5 meters in height, crisscross the landscape, dividing the ground into numerous narrow passages and small open grassy areas, creating a complex, natural maze-like terrain. The ridge surfaces are mostly hexagonal or polygonal columnar structures, some with slightly rounded edges due to weathering, or forming isolated pillars. The ground is mainly flat grass or a thin layer of weathered soil, with almost no obvious fissures, making walking relatively comfortable. The overall landscape presents an ancient, regular, and mysterious basalt labyrinth; The volcanic zone is strictly located in the central core of the stone forest area, and the two have completely different ecosystems: entering the outer perimeter or most of the stone forest area does not necessarily mean reaching the volcanic zone." characteristic_plants: ["Silky-leaf oak", "Ferns", "Orchids", "Azaleas", "Sand ginger"] characteristic_animals: ["Lizards", "Butterfly swarms", "Beetles"] volcanic_features: - "Main volcano: Located in the center of the Stone Forest area, it is composed of basalt and has a regular conical shape. It is currently dormant. The basalt in the Stone Forest area shares the same origin as the main volcano, but the columnar jointing of the basalt in the Stone Forest area is more developed." - "Volcanic Zone Ecology: The bedrock is mainly basalt (both the Stone Forest area and the volcanic zone are dominated by this). The surface in the Stone Forest area has a significant amount of weathered soil and grassland cover, while in the volcanic zone, most of the soil is exposed or covered with volcanic debris, with extremely low vegetation cover. Only scattered drought-resistant, acid-resistant, and heat-resistant shrubs and wild grasses, and occasionally one or two isolated large heat-resistant plants, form a unique geothermal ecosystem near the crater. Even if the main volcano erupts, the lava mainly falls on nearby land or exposed rock surfaces, preventing it from spreading throughout the Stone Forest area or causing island-wide fires." - "Volcanic geological features: Sulfur deposits, graphite deposits, natural hot springs, and a few mud volcanoes (mainly erupting mineral mud and gases)." - "Mineral mud: Also known as mineral clay, formed by volcanic ash and lava debris mixed with water. It appears in a few mineral mud hot springs. It is bright gray (with a silver-white metallic mineral sheen), rich in minerals, warm like a hot spring bath. When sinking into it, the texture is fine and smooth like well-mixed plaster, accompanied by a mineral scent and light bubbles. The viscosity is moderate. (Note: Strictly do not confuse with the silt in the marsh wetland.)" - name: "Marsh Wetland (Tropical Freshwater Long Marsh)" location: "Northwestern and southwestern coastal areas of the island and their inland extensions" description: "A typical tropical freshwater herbaceous wetland formed by perennial or seasonal waterlogged lowlands. The core wetland area has denser trees and shrubs, while the edges and transition zones gradually become sparser, blending with shallow water marshes and muddy tidal flats. The water is primarily freshwater with extremely low salinity (only slight brackish influence in the outermost coastal transition zones). The soil is long-term saturated and rich in organic matter, with many shallow water areas and muddy flats on the surface; peat can sometimes be dug up. This area has clear ecological boundaries with other parts of the island (such as the stone forest and rainforest)" marsh_mud_texture: "The silt in marsh wetland is soft and sticky, formed from yellowish-brown alfisol(leached soil) mixed with decaying plant debris under long-term waterlogging conditions. Rich in organic matter, it carries the scent of damp leaves, soil, and slightly fermented plants (sometimes with a faint sulfurous odor). Stepping on it or pulling your feet out produces a dull gurgling sound and a splashing noise." - "The surface silt is a rich, warm, dark brown (like moist cocoa sauce or dark roast coffee), moderately sticky, and easily adheres to shoes, clothing, or skin." - "The deeper silt, once dug in or tamped down, is a cool, grayish-brown, slightly moist, and has a texture like a thick ointment or wet dough." - "The deepest mud layer usually reaches only above the waist but never to the chest. Here, all areas with dense grass or shrubs are relatively solid ground; most surfaces without grass, that are reflective, or covered with shallow water are soft mud. (Note: Silt can only be found in swamp wetland. It must not be confused with mineral mud/mineral clay in volcanic areas. It is strictly forbidden to describe silt as grayish-white, silvery, metallic, or sulfurous.)" characteristic_plants: ["Nipa palm", "Willow trees", "Water lilies", "Cattails", "Reeds and papyrus", "Lotus (lotus roots and seed pods can be harvested)", "Water ferns"] characteristic_animals: ["Mudskippers", "Archerfish", "Mud crabs and fiddler crabs", "Herons and egrets", "Flamingos", "Siamese crocodiles", "Otters", "Frogs and toads", "Various water birds and insects", "Dugongs (extremely rare, only in coastal transition zones)"] - name: "Lakes and Rivers" description: "There is one medium-sized freshwater lake with a radius of 350 meters and five clear rivers on the island. The rivers vary in width from 3 to 6 meters and flow from the inland toward the sea." characteristic_plants: ["Ferns", "Wild rice (in shallow water areas)"] characteristic_animals: ["Mallards", "Otters", "Sea turtles (occasionally)", "Mudskippers (at river mouths)", "Archerfish (at river mouths)"] - name: "Beach" location: "Surrounding the entire island perimeter; rocky cliffs on the southern and northern coasts, while the eastern and western coasts are flat." description: "The white sand beach is composed of fine, soft coral fragments containing calcium carbonate, feeling like a carpet underfoot. The seawater is turquoise and crystal clear, with coral reefs scattered in the open ocean surrounding the island. The beach is generally 40-60 meters wide (narrowest at high tide, 20-30 meters, and widest at low tide, up to 80 meters). Some areas may contain varying amounts of rocks." rocks: "Beach reefs mainly consist of tropical beach rock and carbonate rock cemented from coral debris, appearing grayish-white or light brown. They often form layered or patchy structures in the intertidal zone. After long-term wave erosion, the surface is smooth or full of holes. At low tide, they are exposed, forming natural tide pools." characteristic_plants: ["Coconut palms", "Bougainvillea", "Glasswort", "Sea peas"] characteristic_animals: ["Coconut crabs (rare)", "Fiddler crabs", "Soldier crabs", "Hermit crabs", "Sea turtles (during nesting season)", "Dolphins (near shore)", "Seagulls", "Frigatebirds"] cliff_walls: cliff_walls_name: "Cliff Walls" cliff_walls_description: "Exposed cliff walls are distributed along the southern and northern coasts of the island, primarily composed of siliceous rock. Cliff heights range from 1 to 4 meters, with slopes from 60° to 80°. Beach width here shrinks to 10–30 meters (narrowest 3–7 meters at high tide, widest 30 meters at low tide). The western and eastern coasts are flat with no obvious cliffs." cliff_walls_geological_features: - "Main rock: Siliceous rock" - "Associated minerals: Gypsum (white or translucent crystal clusters, often embedded in siliceous rock fissures)" cliff_walls_characteristics: "Small sea-eroded platforms and tidal pools sometimes form at the base of the rock face, exposing a slippery rock surface at low tide. Some sections of the rock face have a high gypsum content, resulting in a slight white powdery exudate that shimmers in the sunlight. The climbing difficulty is relatively low." cliff_walls_ecological_note: "A few salt-tolerant and drought-resistant ferns and bougainvillea grow in the cliff crevices. Occasionally, hermit crabs and fiddler crabs can be seen moving among the rock fissures." island_main_plants: common: ["Palm trees", "Orchids", "Ferns", "Water lilies", "Rubber trees", "Bougainvillea", "Bamboo", "Mahogany", "Taro", "Cocoa trees", "Banana trees", "Mango trees", "Papaya trees", "Wild pineapple", "Kapok trees", "Silky-leaf oak", "Azaleas"] salt_tolerant_plants: - name: "Glasswort (Salicornia europaea L.)" aliases: ["Sea beans", "Sea asparagus"] description: "A plant in the Amaranthaceae family, genus Salicornia. The tender stems are crisp and juicy with a natural salty flavor. It can be eaten raw, in salads, pickled, or stir-fried, and also used medicinally. It helps calm the liver, promote diuresis, lower blood lipids, and assist with weight loss." uses: ["Specialty vegetable", "Oil extraction", "Livestock feed", "Green fodder"] characteristics: "Extremely salt-tolerant, flood-tolerant, and barren-soil tolerant, with high protein and amino acid content." - name: "Quinoa (Chenopodium quinoa Willd.)" aliases: ["Inca rice", "Golden grain"] description: "A plant in the Amaranthaceae family. Mature flower spikes are red, purple, or yellow. When cooked, it has a texture similar to millet rice with a slight bitter note." characteristics: "High protein, low glucose, rich in unsaturated fatty acids, vitamins, and antioxidants." - name: "Sea Pea (Lathyrus japonicus)" aliases: ["Beach sweet pea", "Coastal vetchling"] description: "A climbing legume that grows on beaches and in the intertidal zone. The vines are covered with salt frost and produce small pale purple flowers. The pods are slender, and the seeds are olive-green with a sea-salt and nutty aroma." characteristics: "Taste similar to peas but with a slight salty and nutty flavor. Contains β-ODAP; long-term heavy consumption carries a risk of neurotoxicity (e.g., leg paralysis). Suitable only as a small supplementary food." caution: "Consumption quantity must be strictly controlled. Cooking does not completely remove the toxin." rules: - "you can freely develop and modify the island, but descriptions must maintain realistic ecological logic and immersion." - "{{char}} will absolutely not control, represent, or assume any actions, thoughts, feelings, or conversations of you" - "All descriptions of creatures, plants, geography, and environment must strictly follow the biome distributions set above." - "Flora and fauna from different biomes appear only in their corresponding environments, with only minor overlap possible in transition zones." - "Use vivid, sensory-rich language to describe the environment (visual, sound, smell, touch, temperature)" - "Animal behavior should conform to real tropical island ecology (e.g., sea turtles appear in large numbers only during nesting season; dugongs are extremely rare but friendly)" ```

Visual cheat sheet

A nearly circular tropical island of 10 square kilometers, dominated by a dense, layered rainforest in its interior. A distinctive stone forest of dark gray to black basalt columns, forming a natural maze-like landscape, rises in the central-southern area, with a dormant conical volcano at its core. Northwestern and southwestern coastal areas feature a tropical freshwater marsh with lush vegetation like nipa palms and willows. The entire island is fringed by a white sand beach composed of fine coral fragments, with rocky cliffs along the northern and southern coasts. The scene is set in bright daylight under a typical tropical maritime climate, presenting a vivid palette of deep greens, grays, and the turquoise of the surrounding sea.