biodiversity management in dryland ecosystems grant norbury james smith andrea byrom roger pech
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Biodiversity management in dryland ecosystems Grant Norbury James Smith Andrea Byrom Roger Pech. Diverse, but threatened, indigenous biodiversity. Two major ecological issues. Complex food webs Successional vegetation. Exotic invaders. Short grass. Tall grass. Tall grass Shrub. - PowerPoint PPT PresentationTRANSCRIPT
Biodiversity outcomes of pest-pest interactions Grant Norbury James Smith Andrea Byrom Roger Pech
Biodiversity management in dryland ecosystems
Grant NorburyJames SmithAndrea ByromRoger Pech1
Diverse, but threatened, indigenous biodiversity
2Two major ecological issuesComplex food webs
Successional vegetation3Exoticinvaders
4
5
Short grassShrubTall grassShrubTall grassShrub succession6Conservation management in drylandsPredator controlRabbit controlWeed controlLand retirementLand development7LizardsInvertebratesMesopredators
Insectivores
Herbivores
Top predators
Pasture/seed/fruit
Predator controlMesic
LizardsInvertebratesMesopredators
Insectivores
Herbivores
Top predators
Pasture/seed/fruit
Predator controlDryland
LizardsInvertebratesMesopredators
Insectivores
Herbivores
Top predators
Pasture/seed/fruit
Rabbit control
?
10LizardsInvertebratesMesopredators
Insectivores
Herbivores
Top predators
Pasture/seed/fruit
Weed control
Grass
?LizardsInvertebratesMesopredators
Insectivores
Herbivores
Top predators
Pasture/seed/fruit
Land retirement?
Short grassShrubTall grassShrubTall grassLand use intensification
Land use intensification
14
1990
20035 km
ConclusionsEcosystem complexity leads to uncertain outcomes
Changes in land use can have profound effects on food webs, and therefore on biodiversity
Scale of management is critical
Thankyou
Foundation for Research, Science & Technology
Department of Conservation