dear colleagues,
Please find enclosed a paper published in current biology by Rutishauser
et al. 2015, from our TmFO network that might interest you, particularly
those interested in tropical silviculture.
abstract:
While around 20% of the Amazonian forests has been cleared for pastures
and agriculture, one fourth of the remaining forests is dedicated to
wood production. Most of these production forests have been or will be
selectively harvested for commercial timber, but recent studies show
that even soon after logging, harvested stands retain much of their
tree-biomass carbon and biodiversity. We use a network of 79 permanent
sample plots (376 ha total) located at 10 sites across the Amazon Basin
to assess the main drivers of time-to-recovery of post-logging tree
carbon. Recovery time is of direct relevance to policies governing
management practices (i.e. allowable volumes cut and cutting cycle
lengths), and indirectly forest-based climate change mitigation
interventions. We found that the proportion of initial above-ground
carbon stock lost (i.e., trees harvested and destroyed by logging
operations) best predicted the time to recover initial carbon stocks. No
other variables tested contributed substantially to the prediction of
recovery times, despite the fact that the sampled plots span large
geographic and environmental gradients across the entire Amazon Basin.
These results reveal clear patterns that can clarify tradeoffs for
policy-makers and forest managers between short-term economics and
long-term carbon storage and hence climate regulation. Forest management
regulations vary among Amazonian countries, but generally set minimum
cutting cycles at 30-60 years, with harvests of 10- 30 m3 ha-1. While
these cutting cycles are generally insufficient to recover commercial
timber stocks, such harvest intensities require 7 and 21 years
respectively to recover their initial ACS, assuming ACS losses
proportional to harvested timber volumes.
cheers
--
Plinio Sist
Cirad-ES
Directeur-Director
UR (B&SEF) "Biens et Services des Ecosystèmes Forestiers tropicaux"
Coordinator of IUFRO 1.02.02 Ecology and silviculture of moist forests in the tropics
Campus International de Baillarguet, TA C-105/D
34398 Montpellier Cedex 5 France
Tél : +33 4 67 59 39 13
Tel.Portable/Mobile Phone: +33 786 3289 46
http://ur-bsef.cirad.fr/fr
Division 1 Colleagues:
Announcing an *“Expert Workshop on Restoration and Adaptation of Mountain
Forests in Central and Northeast Asia”* to be held 19-22 October 2015 at
the City Hotel in Bishkek, Kyrgyzstan. This workshop is sponsored by IUFRO
Unit 1.06.00 Restoration of Degraded Sites, Unit 1.01.05 Mountain Forest
Management, and the Task Force Forest Adaptation and Restoration under
Global Change. It provides a targeted follow-on to the workshop held in
2014 in Ulaanbaatar, Mongolia and to the Keep Asia Green work supported by
the ASEAN-Korea Environmental Cooperation Project (AKECOP) and the Special
Programme for Development of Capacities (SPDC) of the International Union
of Forest Research Organizations (IUFRO). For more information contact Dr.
John Stanturf, jstanturf(at)fs.fed.us.
--
John Stanturf
Center for Forest Disturbance Science
US Forest Service Southern Research Station
320 Green Street
Athens, GA 30602 USA
+ 706-559-4316 tel
+ 706-559-4317 fax
+ 706-202-8066 mobile
website: http://sites.google.com/site/johnstanturf/
*“Leadership is solving problems. The day soldiers stop bringing you their
problems is the day you have stopped leading them. They have either lost
confidence that you can help or concluded you do not care. Either case is a
failure of leadership.”* ~ Colin Powell
Views and Opinions expressed in this email are solely representative of the
sender and do not represent those of the Forest Service or any other agency.
Dear Colleagues,
I am please to invite you to this side event organized by Cirad, FAO and
Cifor on concession in tropical forests. The main objectove of this side
event is to discuss and to evaluate the future prospects of
concession-based forestry, firstly based on an analysis of specific
challenges the forest concession forestry now faces in the three major
tropical forest regions (Amazon Basin, Congo Basin and South East Asia)
and, secondly by comparing the design and implementation of forest
concessions in the three regions where tropical forests occur (Central
Africa, Tropical America and South east Asia). I hope that the
colleagues from division 1 attending the congress will participate to
this side event on Monday night 19h45-21h00...
best regards
--
Plinio Sist
Cirad-ES
Directeur-Director
UR (B&SEF) "Biens et Services des Ecosystèmes Forestiers tropicaux"
Coordinator of IUFRO 1.02.02 Ecology and silviculture of moist forests in the tropics
Campus International de Baillarguet, TA C-105/D
34398 Montpellier Cedex 5 France
Tél : +33 4 67 59 39 13
Tel.Portable/Mobile Phone: +33 786 3289 46
http://ur-bsef.cirad.fr/fr
Effects of Ungulate Browsing on Forest Regeneration and Silviculture
Birmensdorf (Zürich), Switzerland / 14 - 16 October 2015
http://www.wsl.ch/iufro-ungfor2015/
Dear Division 1 Scientists and Colleagues,
Ungulate browsing is one of the many factors that affect tree establishment, growth and mortality and thus both structure and species composition of forests. Tree saplings are part of the usual food of ungulate species and palatable tree species, like Abies alba (European silver fir), are often browsed by ungulates. At the same time, natural regeneration of a mixture of species is valued in mountain protection forests to mitigate damages of snow avalanches, rockfall, mass flow and wind storms. Thereby, species with deep rooting systems (like Abies alba and Acer pseudoplatanus) are particularly important.
Measuring and monitoring the effects of ungulates on forest regeneration pose however major challenges because leader shoot browsing rate linearly correlates neither with tree density nor with species composition. The conference intends to present the current state of knowledge on ungulate impacts on tree regeneration and their implications for forest stand dynamics. We specifically focus on sustainable natural tree regeneration under current and predicted future climate.
If you are working in this area and have not yet registered for the symposium, here is your chance to do so: visit http://www.wsl.ch/iufro-ungfor2015/registration/ and book your place!
We are looking forward to welcoming you to WSL Birmensdorf!
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***********************************************************************************
posted by Brigitte Burger on behalf of
Andreas Zingg, research forester, dipl Forsting. ETH
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
Zürcherstrasse 111
CH-8903 Birmensdorf
Switzerland
phone +41-44-739 23 35
fax +41-44-739 22 15
http://www.wsl.ch
