Sub-Saharan Africa includes regions south of the Sahara. Region contains 46-48 countries according to UN definition. Population was 1.1 billion in 2019, projected to reach 2-2.5 billion by 2050
Herbivores are animals adapted to feed on plants, especially vascular tissues. Term "herbivore" derived from Latin "herba" meaning small plant. First evidence of herbivory in arthropods 20 million years after land plants. Tetrapod herbivory developed in Late Carboniferous (307-299 million years ago)
Krill are small marine crustaceans found worldwide in all oceans. Name comes from Norwegian word meaning "small fry of fish". Most species are 1-2 cm long, some reach 6-15 cm. Have bioluminescent photophores and five pairs of swimming legs
Tundra is a biome where tree growth is hindered by cold temperatures. Contains dwarf shrubs, sedges, grasses, mosses, and lichens. Soil is rich in nitrogen and phosphorus. Term comes from Russian word adapted from Sámi languages
Second-largest freshwater lake worldwide, second deepest after Lake Baikal. Located in Albertine Rift, shared by Tanzania (46%) and DRC (40%). Extends 676 km north-south, covers 32,900 km² with 1,828 km shoreline. Maximum depth 1,470 m, average depth 570 m
Ephemerality describes things existing only briefly, from digital media to streams. Ephemeral streams exist only after precipitation, with low hydrological connectivity. Ephemeral wetlands and ecosystems are common globally, especially in northeastern US. Ephemeral habitats support amphibians during dry seasons and breeding