Tramp species

any species (such as an ant) that is well-adapted to living in close association with humans and easily dispersed around the world as humans ship goods and travel from one place to another (A4, C4)


the process of forming or depositing sediment, often caused by soil being eroded and washed into the ocean (C4, M4)


a reproductive female ant (A4, C4)


a restraint upon the transport of goods designed to prevent the spread of diseases or pests (C4)

Pipped egg

an egg with a shell that has been broken through in the initial stages of hatching (C4)


a substance toxic to plants or insects used to control their populations (A4, C4)


long-term studies involving repeated surveys done in the same sites over time (C4, R4)