Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient

Allbwn ymchwil: Cyfraniad at gynhadleddPapuradolygiad gan gymheiriaid

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Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. / Lewis, Owen T.; Markesteijn, Lars.
2016. Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen.

Allbwn ymchwil: Cyfraniad at gynhadleddPapuradolygiad gan gymheiriaid

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Lewis, OT & Markesteijn, L 2016, 'Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient', Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen, 23/02/16 - 26/02/16.

APA

Lewis, O. T., & Markesteijn, L. (2016). Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen.

CBE

Lewis OT, Markesteijn L. 2016. Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen.

MLA

Lewis, Owen T. a Lars Markesteijn Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. European Conference of Tropical Ecology 2016, 23 Chwef 2016, Göttingen, Yr Almaen, Papur, 2016.

VancouverVancouver

Lewis OT, Markesteijn L. Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. 2016. Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen.

Author

Lewis, Owen T. ; Markesteijn, Lars. / Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient. Papur a gyflwynwyd yn European Conference of Tropical Ecology 2016, Göttingen, Yr Almaen.

RIS

TY - CONF

T1 - Effects of pathogens and insect herbivores on plant dynamics and diversity across a natural rainfall gradient

AU - Lewis, Owen T.

AU - Markesteijn, Lars

PY - 2016/2/23

Y1 - 2016/2/23

N2 - Density-dependent seed and seedling mortality caused by pests and diseases has been implicated in maintaining high plant diversity in tropical forests To investigate how these Janzen-Connell effects vary with rainfall we monitored seed arrival and seedling recruitment for 18 months at eight sites spanning a natural precipitation gradient across the Isthmus of Panama Seedling plots were treated with either a fungicide, an insecticide or used as a control. Seedling recruitment was negatively density-dependent in control plots, but this density-dependence was greatly reduced in the insecticide-treated plots. Insecticide treatment also largely eliminated the increase in diversity observed in control plots when comparing seedlings to seeds The positive effects of insects on plant diversity increased significantly with rainfall. Our results suggest a mechanistic explanation for well-documented positive relationships between rainfall and (i) the strength of negative density dependence and (ii) overall tropical forest plant diversity.

AB - Density-dependent seed and seedling mortality caused by pests and diseases has been implicated in maintaining high plant diversity in tropical forests To investigate how these Janzen-Connell effects vary with rainfall we monitored seed arrival and seedling recruitment for 18 months at eight sites spanning a natural precipitation gradient across the Isthmus of Panama Seedling plots were treated with either a fungicide, an insecticide or used as a control. Seedling recruitment was negatively density-dependent in control plots, but this density-dependence was greatly reduced in the insecticide-treated plots. Insecticide treatment also largely eliminated the increase in diversity observed in control plots when comparing seedlings to seeds The positive effects of insects on plant diversity increased significantly with rainfall. Our results suggest a mechanistic explanation for well-documented positive relationships between rainfall and (i) the strength of negative density dependence and (ii) overall tropical forest plant diversity.

M3 - Paper

T2 - European Conference of Tropical Ecology 2016

Y2 - 23 February 2016 through 26 February 2016

ER -