Keynote speaker at the IUFRO Regional Congress for Asia and Oceania –
Forests for Sustainable Development: The Role of Research
Professor Zhang, the IUFRO Regional Congress for Asia and Oceania 2016 is jointly organized by IUFRO and the Chinese Academy of Forestry. This is the first Congress of its kind to be held in the region of Asia and Oceania and will offer an extraordinary opportunity for enhancing forest science cooperation. You are one of the leading scientists in silviculture and forest management in China and have a long experience in the establishment of planted forests on the one hand, and sustainable forest management on the other hand. The Congress will particularly focus on these two areas with its themes “Planted forests for fostering a greener economy”, and “Sustainable forest management for enhanced provision of ecosystem services”. Read more…
Sharing Knowledge to Rebuild Tropical Forests and Landscapes
Tropical forests contain a huge amount of biological diversity, play a key role in human health, offer a vast array of ecosystem services and have become central to global debates on climate change.
But extensive deforestation and degradation are causing a significant decline in the biological diversity and the ecosystem goods and services provided by them. And, in many African countries there is a notable connection between degradation and the inability of decision makers – and the larger society – to access existing scientific knowledge and innovations that could help reverse the impacts of forest degradation. Read more…
Impacts of logging on carbon storage and biodiversity in tropical production forests of Latin America
Moderator: Plinio Sist, CIRAD-ES, France
Friday, 14 June 2013, 8:00-10:00 (Chirripó)
Find more information on the IUFRO Task Force on Biodiversity and Ecosystem Services at:
The session addressed the very important issue of the trade-offs between biomass harvest, carbon storage and biodiversity. Biomass harvest is negatively correlated with biomass storage and, in most cases, with biodiversity.
A key finding of the first presentation, which dealt with a permanent plot experiment in the Amazon, is that logging intensity affects biomass recovery rate and period. The study determined that increased logging intensity is ensued by increased recovery rate, but increases the recovery period.
Another presentation highlighted the effects of logging after 30 years on tree diameter, timber species and floristic diversity. Floristic diversity had recovered to the original state. Conversely, diameter distribution was less heterogeneous and tree species composition had shifted to pioneer and other light demanding species.
The role of individual big trees was also highlighted in a presentation. The study conducted in Pará, Amazon, found that selective logging caused a net biomass storage decrease. Moreover, selective logging creates instability in stands, which results in elevated natural mortality of individual big trees, even 8 years subsequent to logging.
Another presentation emphasised the role of disturbance regimes, showing data that El Nino decreased standing biomass more than logging; where mature stands suffered more damage than newly logged stands. Emphasis was placed on the importance of rotation cycles, as the risk of devastating disturbance regimes increased with increasing rotation periods.
Presentations in this session:
Is Tropical Forest Conservation through silviculture possible? The contribution of Tropical Production Forest Observatory Sentinel Landscape. (Plinio Sist, CIRAD-ES, France)
Thirty years after logging: Three species dynamics in the Tapajos National Forest, Eastern Amazon. (Ademir Ruschel, Embrapa Amazonia Oriental, Brazil
20 years forest dynamics study case in the Embrapa Acre Forest in Acre State, Brazilian Western Amazon. (Marcus d’Olivera)
La dinámica a largo plazo de la diversidad taxonómica y functional de especies leñosas en bosques lluviosos tropicales aprovechados y con tratamiento silvicultural en Costa Rica. (Bryan Finegan, CATIE, Costa Rica)
Post-logging biomass recovery: a pan-tropical analysis (J Putz, Alexander Shenkin)