Forest Degradation and Logging: Detection and Effects.

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Presentation transcript:

Forest Degradation and Logging: Detection and Effects

Guiding Questions from Previous Meetings 1.1 How much logging and forest degradation is taking place at the different LBA sites? 1.2How does this logging and forest degradation vary spatially and temporally in the Basin? 1.3Are there discernible trends along the LBA transects? 1.4What are the effects of logging on the local and regional budgets of carbon and nutrients?

Session Objectives 2.1 Discuss and evaluate progress since last meeting Remote sensing of logging/forest degradation Progress on countryside surveys, field studies, modeling of logging/forest degradation Integration of remote sensing and field studies 2.2 Define future needs Compare methodologies for validation of regional logging products Design a methodology to extrapolate LBA site studies to regional scale Define an action plan to conduct and above

Forest Degradation Logging Fragmentation Fire

Operational Definition of Forest Degradation “Impairment” or “impoverishment”, but what are the metrics? Human-driven changes in forest cover or gap fraction Beyond “natural” levels of gap dynamics

Voiced Needs and Gaps Remote sensing: –Traditional logging –Varzea logging –Forest fragmentation over time –Logging-fire –Fragmentation-fire –Catalog of natural variation that looks like logging –Inter-comparison of methodologies and products Countryside surveys: –Current installed capacity (new sawmills, new roads,…) –Stocks and areas affected RS – modeling linkages –Regeneration: from non-spatial to regional –Harvest projections according to socio-economic and biophysical constraints (transportation, market values, sawmill centers, topography, vegetation) –Fire risk – RS gap fraction –County-level support capacity: integrating logging econ/market with RS-gap fraction –Spatial determinants of logging expansion –Retrospective analysis of forest stock depletion Gap-BGC modeling activity (none noted in Phase-II)

Cross-team Activities for 2004 Goals/NeedsActivitiesLead PersonsParticipantsDelivery Traditional logging Study based on current field data Ane AlencarGreg, Sanae, Carlos July 2004 Catalog of natural variation Basin- gap/forest type analysis Greg AsnerCarlos, Elsa, Ane/Antonio, Dar, Susan, Diogenes, Rita/Juliana, Natalino July 2004 RS Inter- comparison Two-site intercomparison/syn thesis (Tapajos, Carlos SouzaDar, Greg, Mark Cochrane, Joao, Ane, Rita/Juliana, Natalino, Jeff Dec 2004 Installed capacity Surveys + GISDan Nepstad/ Frank Merry Paulo, Natalino, Cesar Sabogal Dec 2004 Logging BGCInter-site comparison and data-gap identification Michael KellerLydia, Susan, Zebu, Greg, Mercedes July 2004 (first cut)

Hierarchical listing of needs from Last LBA Business Meeting Level 1 (most basic level) Location (geographic coordinates) and polygons Rainfall Soil type –moisture regime (number of months PET>PPT) –soil texture and rooting depth: –soil pH, base saturation, exchangeable Al, P, Ca

Hierarchical listing of needs from Last LBA Business Meeting Level 2 History Percent of logged area under FSC? Who conducted deforestation or logging? How was area logged? Time since last logging? Destiny –Area to be deforested –Ownership change - Role of public/private settlements? –Market changes (new demand; species:price; cost:benefit) –Fire risk (increasing edge effects and flammability??) –Infrastructure & land speculation

Hierarchical listing of needs from Last LBA Business Meeting Level 3 (most complex) Current logging statistics/databases and the confidence/reliability of the information logging –IBGE, IBAMA, Greenpeace Forest degradation Ground fires (canopy damage, mortality) Edge effects (biomass collapse, species dynamics, flammability) Who is assessing? How relevant to the regional C budget?

Identify Possible Gaps and Needs for Remote sensing methods and products GIS and modeling Field-based knowledge, validation