A wetland food web is a diagram that shows the feeding relationships of animals living in wetlands, according to Offwell Woodland & Wildlife Trust. The diagram features frogs, toads, tadpoles, newts and a range of invertebrates. A simplistic version of this food web shows the kingfisher and the sparrowhawk as top predators.
According to Coastal Carolina University, food webs can be drawn for animals living in specific types of wetlands. For instance, salt-marsh wetlands have marsh grasses, spartina and other salt-tolerant plants at the bottom of their food webs, and they include rats and mice as potential predators. Consumers in the food web depend on their preferred habitat and preferred prey of choice. Aerial habitat consumers include spiders and insects living on plant leaves and snails. All grazers and birds common to salt-marshes, such as some sparrows and marsh wrens, are also included.
Mangroves wetlands have less variety of producers because of the salt, Coastal Carolina University explains. They are rich in biomass as a result of sustained supply of tidal nutrients. Consumers in the food web include filter feeders and detritivores, such as barnacles and oysters. Fiddler crabs hunt other invertebrates, specifically smaller ones. Producers in tidal freshwater marshes include pondweed, waterweed, wild rice and cordgrass.