Tree species richness and composition 15 years after strip clear-cutting in the Peruvian Amazon

Rondon, Xanic J.; Gorchov, David L.; Cornejo, Fernando

doi:10.1007/978-90-481-2795-5_3

Cited by 4 publications

(22 citation statements)

References 44 publications

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“…Alchornea is widely known as a pioneer taxon (Marchant et al, 2002;Rondon et al, 2009), and its high abundance here could be interpreted to represent the development of secondary forest. However, it is also a common constituent of floodplain vegetation and palm swamps (Roucoux et al, 2013;Aguajal Project, 2015), and given the context and co-occurring taxa, it is these wetland species of Alchornea which are most likely to have been present during this period.…”

Section: Accepted M Manuscriptmentioning

confidence: 87%

The vegetation history of an Amazonian domed peatland

Kelly

Lawson

Roucoux

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Section: Accepted M Manuscriptmentioning

confidence: 87%

The vegetation history of an Amazonian domed peatland

Kelly

Lawson

Roucoux

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…1). The last censuses in strip 1 and 2 took place in 2004 and 2005, when all trees ‡5 cm dbh were measured in all 20 subplots of each strip (Rondon et al 2009a). …”

Section: History Of the Stripsmentioning

confidence: 99%

“…Only 1 % of these trees had no identification to the family level. In the following censuses, great efforts were taken to identify tree taxa (Dolanc et al 2003;Rondon et al 2009a). In the 2004/2005 censuses, all tree taxa ‡5 cm dbh were identified to either species or genus level, and only <1 % of the trees had no identification to the species level.…”

Section: Tree Identificationmentioning

confidence: 99%

“…Thus, carbon stocks (Mg C ha À1 ) were estimated for six time periods: in the pre-clearing (1989) considered old-growth forest [calculated with all trees >7.5 cm dbh in strip 1, only data available for the subplots for the year 1989 (Rondon et al 2009a)], after clearing or year zero (1989), three years after clearing (1992), seven years after clearing (1996), 11 years after clearing (2000), and about 15 years after clearing (2004/2005). Since we have complete tree inventories for year zero (stumps, advanced regeneration, and trees left uncut in defermentcut of strip 2) and year 15, we used all 20 subplots in strip 1 and all 10 subplots in the clear-cut and deferment-cut portions of strip 2 to estimate wood specific gravity and carbon stocks, but for the remaining years we used data from the demography subplots which include recruits.…”

Section: Aboveground Carbon Dynamicsmentioning

confidence: 99%

“…However, the composition at the early stages of regeneration was dominated by pioneer species of low commercial value . Fifteen years into the regeneration of two clear-cut strips, commercial species still had low densities and comprised only 8-15 % of the original basal area (Rondon et al 2009a). Furthermore, commercial stems had low diameter growth rates (<0.3 cm year À1 ) even after the application of silvicultural thinning (Dolanc et al 2003).…”

Section: Introductionmentioning

confidence: 98%

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Aboveground carbon dynamics following strip clear‐cutting in the Peruvian Amazon

Rondon

Gorchov

Noble

et al. 2015

Ecological Research

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Aboveground carbon dynamics were estimated in two strips (30 m · 150 m) clear-cut in the Peruvian Amazon following 15 years after clearing. While strip 1 recovered 50 % (64 Mg C ha À1 ) of its pre-clearing carbon stocks, the clear-cut portion of strip 2 recovered 39 % (53 Mg C ha À1 ). During this period, there were high carbon sequestration rates (>6 Mg C ha À1 year À1 ) from tree growth and low carbon emission rates from tree mortality (up to 3 Mg C ha À1 year À1 ) in both strip 1 and the clearcut portion of strip 2. Recruits make up most of the tree composition in both strips, and therefore play an important role in carbon sequestration. However, there were high carbon emission rates from timber harvesting and processing (>20 Mg C ha À1 year À1 ). A thinning treatment, applied 7 years after clearing, did not affect carbon dynamics. In the 15-year period total carbon emissions (+) were greater than sequestration (À). Net carbon fluxes for strip 1 and the clear-cut portion of strip 2 were +26 and +68 Mg C ha À1 . Comparable carbon dynamics were found in the deferment-cut treatment, applied to the south half of strip 2. To conclude, the 15 year-old clear-cut strips are not carbon sinks yet, and will require >140 years to reach old-growth carbon stocks.

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Edge effects in recruitment of trees, and relationship to seed dispersal patterns, in cleared strips in the Peruvian Amazon

Gorchov

Rondon

Cornejo

et al. 2012

Ecological Research

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We investigated the spatial pattern of tree recruitment 15 years after clear‐cutting in two logged strips in the Peruvian Amazon, focusing on differences between seed dispersal modes and cohorts, and relating these to spatial patterns of seed dispersal in the years immediately following clearing. Most trees that recruited in logged strips belonged to taxa dispersed by birds or nonvolant mammals, with smaller numbers dispersed by bats or wind. Seed dispersal patterns differed, with few mammal‐dispersed seeds reaching strips, bird‐dispersed seeds more abundant near the forest edge than strip centers, and bat‐ and wind‐dispersed seeds more evenly distributed. However, this pattern was not reflected in the tree recruits, except in the deferment cut half of strip 2. Different dispersal modes were differentially represented in different cohorts; for example, in strip 1 bird‐dispersed trees predominated in early cohorts, while trees dispersed by nonvolant mammals predominated in later cohorts. Our finding that trees dispersed by mammals (which disperse the majority of commercial trees in Amazonia) successfully regenerate from seed in the interior of logged strips highlights the value of maintaining these animals in forest management systems.

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Tree species richness and composition 15 years after strip clear-cutting in the Peruvian Amazon

Cited by 4 publications

References 44 publications

The vegetation history of an Amazonian domed peatland

The vegetation history of an Amazonian domed peatland

Aboveground carbon dynamics following strip clear‐cutting in the Peruvian Amazon

Edge effects in recruitment of trees, and relationship to seed dispersal patterns, in cleared strips in the Peruvian Amazon

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