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Core mechanism cluster: Competition / predation = affects populations / niches / coexistence
Fruit pigeons – Bismark Achipelago Islands = closely related pigeons – questioned coexistence (required null model)
Greenwood (1986) - Duck and Skunks = 1600 nests – 5 skunk removal sites = higher hatch rate
McNaughton (1985) - Serengeti Plains = circular migration = suggested grazing facilitation
Core Mechanism cluster: Plants - have defences against herbivorous populations
Oak trees - have chemical and structural defences
chemical - tannins increase in oak leaves from spring to autumn (adapting to insect life cycles)
Structural - altered leaf texture - old leaves are tougher than tender young ones
Core Mechamism cluster: Habitats - affected by allogenic (not themselves) vs autogenic (themselves)
Stream communities - terrestrial and aquatic food webs linked
Reichman and Seabloom (2002) - Pocket Gophers = ecosystem engineers through borrowing = gaps in plant matrix
Marczak, Roderick and Richardson (2007) - removal of aquatic insects = reduced riparian spiders = ecosystem connectivity
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