Forest fragmentation and edge effects from deforestation and selective logging in the Brazilian Amazon

Broadbent, Eben N.; Asner, Gregory P.; Keller, Michael; Knapp, David; Oliveira, Paulo J. C.; Silva, Javier

doi:10.1016/j.biocon.2008.04.024

Cited by 459 publications

(407 citation statements)

References 56 publications

Supporting

Mentioning

375

Contrasting

Unclassified

Order By: Relevance

“…The next three most significant factors, including the fractional cover of nonwoody plants and bare substrate as well as relative elevation above nearest water body, accounted for an additional 32% of the ACD variation throughout the country. Within forest ecosystems, nonwoody canopy and bare substrate cover are well-known metrics of deforestation and degradation via logging and fire that removes woody plants (16)(17)(18)(19)(20)(21)(22). Relative elevation above the nearest water is highly indicative of a water deficit in deserts and grasslands or of a water surplus (which can cause anoxia) in rainforests, both of which reduce vegetation carbon storage.…”

Section: Resultsmentioning

confidence: 99%

Targeted carbon conservation at national scales with high-resolution monitoring

Asner

Knapp

Martin

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

106

134

View full text Add to dashboard Cite

Terrestrial carbon conservation can provide critical environmental, social, and climate benefits. Yet, the geographically complex mosaic of threats to, and opportunities for, conserving carbon in landscapes remain largely unresolved at national scales. Using a new high-resolution carbon mapping approach applied to Perú, a megadiverse country undergoing rapid land use change, we found that at least 0.8 Pg of aboveground carbon stocks are at imminent risk of emission from land use activities. Map-based information on the natural controls over carbon density, as well as current ecosystem threats and protections, revealed three biogeographically explicit strategies that fully offset forthcoming land-use emissions. High-resolution carbon mapping affords targeted interventions to reduce greenhouse gas emissions in rapidly developing tropical nations.carbon sequestration | forest degradation | deforestation | light detection and ranging | REDD+

show abstract

Section: Resultsmentioning

confidence: 99%

Targeted carbon conservation at national scales with high-resolution monitoring

Asner

Knapp

Martin

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

106

134

View full text Add to dashboard Cite

show abstract

“…First, we are able to apply GLOBIO at a fine resolution with globally available data by improving the designation of different land-use types (e.g., managed pasture vs. grassland, managed vs. primary-growth forest), and we develop a method for estimating fragmentation using a Gaussian filter to smooth individual pixel changes. Second, we adapt the InVEST carbon model to account for empirical evidence that higher mortality rates for large trees exist in forest edges, and thus the amount of carbon that vegetation can store increases with distance from forest edge (48,49). We use the pantropical carbon and associated land cover datasets created by the Woods Hole Research Center (50) to construct a logarithmic regression between distance to forest edge and forest biomass and apply that predictive relationship to all forest pixels in our scenarios.…”

Section: Methodsmentioning

confidence: 99%

Spatial patterns of agricultural expansion determine impacts on biodiversity and carbon storage

Chaplin‐Kramer

Sharp

Mandle

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

221

133

View full text Add to dashboard Cite

The agricultural expansion and intensification required to meet growing food and agri-based product demand present important challenges to future levels and management of biodiversity and ecosystem services. Influential actors such as corporations, governments, and multilateral organizations have made commitments to meeting future agricultural demand sustainably and preserving critical ecosystems. Current approaches to predicting the impacts of agricultural expansion involve calculation of total land conversion and assessment of the impacts on biodiversity or ecosystem services on a per-area basis, generally assuming a linear relationship between impact and land area. However, the impacts of continuing land development are often not linear and can vary considerably with spatial configuration. We demonstrate what could be gained by spatially explicit analysis of agricultural expansion at a large scale compared with the simple measure of total area converted, with a focus on the impacts on biodiversity and carbon storage. Using simple modeling approaches for two regions of Brazil, we find that for the same amount of land conversion, the declines in biodiversity and carbon storage can vary two-to fourfold depending on the spatial pattern of conversion. Impacts increase most rapidly in the earliest stages of agricultural expansion and are more pronounced in scenarios where conversion occurs in forest interiors compared with expansion into forests from their edges. This study reveals the importance of spatially explicit information in the assessment of land-use change impacts and for future land management and conservation.ecosystem services | deforestation | agricultural expansion | fragmentation | edge effects

show abstract

“…Logging gaps are heterogeneous. In particular, the proportion of edges and centres may differ depending on the gap shape (Broadbent et al 2008;Lopes et al 2009). We thus focused on two habitats, gap edges (a 4-m-perimeter band of each gap), and logging gaps (gap centres at least 4 m from any edge).…”

Section: S I T E D E S C R I P T I O Nmentioning

confidence: 99%

Contrasting taxonomic and functional responses of a tropical tree community to selective logging

Baraloto

Hérault

Paine

et al. 2012

Journal of Applied Ecology

113

100

View full text Add to dashboard Cite

Summary1. Considerable debate surrounds the extent to which tropical forests can be managed for resource extraction while conserving biodiversity and ecosystem properties, which depend on functional composition. Here we evaluate the compatibility of these aims by examining the effects of logging on taxonomic and functional diversity and composition in a tropical forest. 2. Twenty years after selective logging, we inventoried 4140 stems regenerating in logging gaps and adjacent undisturbed areas, and we integrated a database of 13 functional traits describing leaf and wood economics of tropical trees. 3. We found no differences in taxonomic and functional richness among habitats, but logging gaps had significantly higher taxonomic and functional evenness. 4. Logging also effected striking, long-term changes in both species and functional composition. In particular, the xylem density of recruits in logging gaps was 6% less than in unlogged forests, leaves were 11% less tough and had 6-13% greater mineral nutrient concentrations. 5. Synthesis and applications. Our results suggest that managers of tropical forests should limit overall surface area converted to logging gaps by creating fewer, larger gaps during selective logging, to reduce impacts on the taxonomic and functional composition of the regenerating stand.

show abstract

Forest fragmentation and edge effects from deforestation and selective logging in the Brazilian Amazon

Cited by 459 publications

References 56 publications

Targeted carbon conservation at national scales with high-resolution monitoring

Targeted carbon conservation at national scales with high-resolution monitoring

Spatial patterns of agricultural expansion determine impacts on biodiversity and carbon storage

Contrasting taxonomic and functional responses of a tropical tree community to selective logging

Contact Info

Product

Resources

About