The influence of sward height and vegetation composition in determining the habitat preferences of three Chorthippus species (Orthoptera: Acrididae) in Chelmsford, Essex, UK

Autor:	Robin Field, Julian Hill, Tim Gardiner, M Pye
Rok vydání:	2002
Předmět:	Chorthippus brunneus Chorthippus biology Festuca Agronomy Ecology Insect Science Chorthippus parallelus Chorthippus albomarginatus biology.organism_classification Grasshopper Poa trivialis Lolium perenne
Zdroj:	Journal of Orthoptera Research. 11:207-213
ISSN:	1937-2426 1082-6467
DOI:	10.1665/1082-6467(2002)011[0207:tiosha]2.0.co;2
Popis:	This paper investigates the habitat preferences of Chorthippus albomarginatus, Chorthippus brunneus and Chorthippus parallelus in relation to sward height and vegetation composition. using 2 X 2-m quadrats, the grasshopper fauna of 15 sites was surveyed in July and August of 2000 and 2001. The results obtained highlight the importance of sward height and vegetation composition in determining grasshopper abundance. The three Chorthippus species were found to favor sward heights between 100 to 200 mm. C. brunneus and C. parallelus in particular, were positively associated with fine-leaved grass species such as Agrostis spp. or Festuca spp. (p < 0.05) and negatively associated with Lolium perenne L. and Poa trivialis L. (p < 0.01). Both C. parallelus and C. brunneus were found to be in significantly higher abundance at heathland sites than in agricultural habitats. This may have been because the farmland sites were dominated by L. perenne, which may not be a suitable food resource for grasshoppers, ...
Databáze:	OpenAIRE
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