Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1093-1100 |
| Journal | Ecology Letters |
| Volume | 14 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2011 |
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Keywords
- barro-colorado island
- janzen-connell model
- rain-forest
- species-diversity
- neotropical tree
- bruchid beetles
- plant diversity
- parent palm
- dispersal
- predation
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Tri-trophic interactions affect density dependence of seed fate in a tropical forest palm. / Visser, M.D.; Muller-Landau, H.C.; Wright, J.; Rutten, G.; Jansen, P.A.
In: Ecology Letters, Vol. 14, No. 11, 2011, p. 1093-1100.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Tri-trophic interactions affect density dependence of seed fate in a tropical forest palm
AU - Visser, M.D.
AU - Muller-Landau, H.C.
AU - Wright, J.
AU - Rutten, G.
AU - Jansen, P.A.
PY - 2011
Y1 - 2011
N2 - Natural enemies, especially host-specific enemies, are hypothesised to facilitate the coexistence of plant species by disproportionately inflicting more damage at increasing host abundance. However, few studies have assessed such Janzen–Connell mechanisms on a scale relevant for coexistence and no study has evaluated potential top-down influences on the specialized pests. We quantified seed predation by specialist invertebrates and generalist vertebrates, as well as larval predation on these invertebrates, for the Neotropical palm Attalea butyracea across ten 4-ha plots spanning 20-fold variation in palm density. As palm density increased, seed attack by bruchid beetles increased, whereas seed predation by rodents held constant. But because rodent predation on bruchid larvae increased disproportionately with increasing palm density, bruchid emergence rates and total seed predation by rodents and bruchids combined were both density-independent. Our results demonstrate that top-down effects can limit the potential of host-specific insects to induce negative-density dependence in plant populations.
AB - Natural enemies, especially host-specific enemies, are hypothesised to facilitate the coexistence of plant species by disproportionately inflicting more damage at increasing host abundance. However, few studies have assessed such Janzen–Connell mechanisms on a scale relevant for coexistence and no study has evaluated potential top-down influences on the specialized pests. We quantified seed predation by specialist invertebrates and generalist vertebrates, as well as larval predation on these invertebrates, for the Neotropical palm Attalea butyracea across ten 4-ha plots spanning 20-fold variation in palm density. As palm density increased, seed attack by bruchid beetles increased, whereas seed predation by rodents held constant. But because rodent predation on bruchid larvae increased disproportionately with increasing palm density, bruchid emergence rates and total seed predation by rodents and bruchids combined were both density-independent. Our results demonstrate that top-down effects can limit the potential of host-specific insects to induce negative-density dependence in plant populations.
KW - barro-colorado island
KW - janzen-connell model
KW - rain-forest
KW - species-diversity
KW - neotropical tree
KW - bruchid beetles
KW - plant diversity
KW - parent palm
KW - dispersal
KW - predation
U2 - 10.1111/j.1461-0248.2011.01677.x
DO - 10.1111/j.1461-0248.2011.01677.x
M3 - Article
VL - 14
SP - 1093
EP - 1100
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 11
ER -