Florian Hofhansl

Tropical Ecosystem Research


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Amazonas-Regenwald: Welche Blüten der Klimawandel treibt

Download von http://www.picturedesk.com am 30.05.2017 (15:32).
View from the ATTO tower at the ATTO research center in the rain forest in Manaus, Brazil, 7 November 2016. PHOTO: GEORG ISMAR/dpa – 20161107_PD13343

Der Klimawandel macht auch vor dem Amazonas-Regenwald nicht halt. Ein internationales Forscherteam ergründet nun, wie seine Bäume darauf reagieren Manaus/Wien – (derstandard.at›WissenschaftForschung Spezial, Text von Bernadette Strohmaier, 12.6.2017)

http://derstandard.at/2000058829411/Amazonas-Regenwald-Welche-Blueten-der-Klimawandel-treibt#forumstart

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TLS comparing vegetation structure along topographic gradients

Recently we have been investigating species composition and vegetation structure in 20 one-hectare plots established along edaphic and topographic gradients across the OSA peninsula, Costa Rica comparing plot-based field measurements with data derived from terrestrial laser scanning (TLS). Check out some scans right here:


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LACOSA project update

In the currently running LACOSA project we will be investigating species composition and vegetation structure of >10.000 tree individuals that have been mapped and identified in 20 one-hectare plots established in SW Costa Rica. By using TLS to map aboveground C stocks across topoedaphic and successional gradients on the OSA peninsula we aim to create a more mechanistic understanding of how the controlling state factors (e.g. climate, geology, time and biota) determine the distribution of aboveground C stocks at the landscape-scale. Check out some of the scans right here:


ATBC 2016 conference meeting, Montpellier, France

The impacts of elevated atmospheric CO2 (eCO2) and alterations in nutrient availability on the carbon storage capacity and resilience of the Amazon forest remain highly uncertain. Carbon dynamics are controlled by multiple eco-physiological processes responding to environmental change, but we lack solid experimental evidence, hampering theory development and thus representation in ecosystem models.

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Here, we present two ecosystem-scale manipulation experiments, to be carried out in the Amazon, that examine tropical ecosystem responses to eCO2 and alterations in nutrient availability and thus will elucidate the representation of crucial ecological processes by ecosystem models.

We highlight current gaps in our understanding of tropical ecosystem responses to projected global changes in light of the eco-physiological assumptions considered by current ecosystem models.

We conclude that a more detailed process- based representation of the spatial (e.g., soil type; plant functional type) and temporal (seasonal and inter-annual) variability of tropical forests is needed to enhance model predictions of ecosystem responses to projected global environmental change.

Link to contribution “Amazon forest responses to elevated atmospheric CO2”: http://journal.frontiersin.org/article/10.3389/feart.2016.00019/full