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Dantas De Paula, M.; Forrest, M.; Langan, L.; Bendix, J.; Homeier, J.; Velescu, A.; Wilcke, W. &amp; Hickler, T. (2021): <b>Nutrient cycling drives plant community trait assembly and ecosystem functioning in a tropical mountain biodiversity hotspot</b>. <i>New Phytologist</i> <b>-</b>(-), -.

Resource Description

Title: Nutrient cycling drives plant community trait assembly and ecosystem functioning in a tropical mountain biodiversity hotspot
FOR816dw ID: 1933
Publication Date: 2021-07-06
License and Usage Rights:
Resource Owner(s):
Individual: Mateus Dantas De Paula
Contact:
Individual: Matthew Forrest
Contact:
Individual: Liam Langan
Contact:
Individual: Jörg Bendix
Contact:
Individual: Jürgen Homeier
Contact:
Individual: Andre Velescu
Contact:
Individual: Wolfgang Wilcke
Contact:
Individual: Thomas Hickler
Contact:
Abstract:
Summary Community trait assembly in highly diverse tropical rainforests is still poorly understood. Based on more than a decade of field measurements in a biodiversity hotspot of southern Ecuador, we implemented plant trait variation and improved soil organic matter dynamics in a widely used dynamic vegetation model (the Lund-Potsdam-Jena General Ecosystem Simulator, LPJ-GUESS) to explore the main drivers of community assembly along an elevational gradient. In the model used here (LPJ-GUESS-NTD, where NTD stands for nutrient-trait dynamics), each plant individual can possess different trait combinations, and the community trait composition emerges via ecological sorting. Further model developments include plant growth limitation by phosphorous (P) and mycorrhizal nutrient uptake. The new model version reproduced the main observed community trait shift and related vegetation processes along the elevational gradient, but only if nutrient limitations to plant growth were activated. In turn, when traits were fixed, low productivity communities emerged due to reduced nutrient-use efficiency. Mycorrhizal nutrient uptake, when deactivated, reduced net primary production (NPP) by 61–72% along the gradient. Our results strongly suggest that the elevational temperature gradient drives community assembly and ecosystem functioning indirectly through its effect on soil nutrient dynamics and vegetation traits. This illustrates the importance of considering these processes to yield realistic model predictions.
Keywords:
| mycorrhiza | dynamic vegetation model | nutrient cycling | plant community assembly | plant functional traits | tropical montane forests (TMF) |
Literature type specific fields:
ARTICLE
Journal: New Phytologist
Volume: -
Issue: -
Page Range: -
Metadata Provider:
Individual: Maik Dobbermann
Contact:
Online Distribution:
Download File: http://www.lcrs.de/publications.do?citid=1933


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