Habitat use by indigenous grazing ungulates in relation to sward structure and veld condition.

Abstract

The objective of this study was to examine the relationships between the habitat requirements of different wild ungulate species, sward structure and veld condition. Veld condition score was correlated with sward height: habitats with high condition scores were dominated by tall grass species, whereas habitats with low scores were dominated by short grasses. Illustrates with tables; The objective of the study was to examine the relationships between the habitat requirements of different wild ungulate species, sward structure and veld condition. Veld condition score was correlated with sward height: habitats with high condition scores were dominated by tall grass species, whereas habitats with low scores were dominated by short grasses. This was because grass species that decrease as a result of heavy grazing ('decreaser' species) are typically tall, whereas those that are promoted by grazing ('increaser' species) are typically short. Grazers that require tall grasses (mountain zebra and red hartebeest) favoured habitat with high condition scores, whereas short grass grazers (black wildebeest) favoured range with low condition scores. The patch-selective grazing habits of the short grass grazers tended to create short grass lawns dominated by increaser grasses. The relevance of veld condition assessment for areas managed to support wild grazing ungulates is discussed.Language: English

Keywords: Grass; Niche separation; Specific habitat patches; Underlying hypothesis; Veld management; conservation; grazing; habitat; sward height; ungulates; veld condition assessment; veld condition score; sward structure; grazers; habitat requirements; habitats; grasses; mountain zebra; red hartebeest; black wildebeest; mountain zebra national park; eastern cape; south africa