Tropical Forest Community Ecology

Ecosystem Decay in Closed Forest Fragments 311

Table 18.1 Relative abundance of some animals on Lago Guri islands, by functional group.

Functional group Landmass category

Small Medium Large Mainland

Predatorsofvertebrates

Jaguar, puma, harpy tr. +

Ocelot tr. ++

Raptors ++

Boa, rattlesnake ++

Predatorsofinvertebrates

Birds ++ − + +

Amphibians

Dendrobatesleucomelos +++++ + +

Bufospp. ++ + + +

Lizards

Ameivaameiva +++++ + +

Spiders ++++ + +

Pollinators

Social bees −+++

Butterflies −+++

Hummingbirds ++ + + +

Seeddispersers

Capuchin monkey ++ ++ +

Guans # ++

Toucans # ++

Cotingidae −++

Pipridae +++++

Thraupidae # +++

Turdidae # ++

Seedpredators

Collared peccary tr. ++ +

Bearded saki monkey # ++

Agouti ++ ++ +

Paca ++

Spiny rat ++

Other small rodents ++++++ + +

Generalistherbivores

Tortoise ++ ++ +

Deer # ++

Tapir +

Howler monkey +++++ + +

Iguana +++++ + +

Porcupine #? ++

Leaf-cutter ants +++++ + +

Socialinsectpredators

Armadillo, nine-banded ++ + +

Armadillo, large # ++

Tamandua # ++

Giant anteater tr. +

Army ant (E.hammatum) ++

Note:+, abundance equivalent to mainland;++, supranormal abundance;+++, hyperabundant;−, abundance
less than on mainland; #, present on one or more islands of class; tr., transient; ?, presence uncertain.