Ecological consequences of a massive flowering event of bamboo (<i>Chusquea culeou</i>) in a temperate forest of Patagonia, Argentina

Marchesini, Victoria A.; Sala, Osvaldo E.; Austin, Amy T.

doi:10.1111/j.1654-1103.2009.05768.x

Cited by 53 publications

(78 citation statements)

References 31 publications

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“…Bamboo tends to reduce density and basal area of trees [67,68], restraining forest biomass development due to a negative feedback with the recruitment, growth, and survival of other individuals [69,70]. Tree recruitment is suppressed by the low density of seedlings and saplings [71][72][73][74].…”

Section: Discussionmentioning

confidence: 99%

Post-Fire Changes in Forest Biomass Retrieved by Airborne LiDAR in Amazonia

Sato

Gomes²,

Shimabukuro

et al. 2016

Remote Sensing

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Abstract:Fire is one of the main factors directly impacting Amazonian forest biomass and dynamics. Because of Amazonia's large geographical extent, remote sensing techniques are required for comprehensively assessing forest fire impacts at the landscape level. In this context, Light Detection and Ranging (LiDAR) stands out as a technology capable of retrieving direct measurements of vegetation vertical arrangement, which can be directly associated with aboveground biomass. This work aims, for the first time, to quantify post-fire changes in forest canopy height and biomass using airborne LiDAR in western Amazonia. For this, the present study evaluated four areas located in the state of Acre, called Rio Branco, Humaitá, Bonal and Talismã. Rio Branco and Humaitá burned in 2005 and Bonal and Talismã burned in 2010. In these areas, we inventoried a total of 25 plots (0.25 ha each) in 2014. Humaitá and Talismã are located in an open forest with bamboo and Bonal and Rio Branco are located in a dense forest. Our results showed that even ten years after the fire event, there was no complete recovery of the height and biomass of the burned areas (p < 0.05). The percentage difference in height between control and burned sites was 2.23% for Rio Branco, 9.26% for Humaitá, 10.03% for Talismã and 20.25% for Bonal. All burned sites had significantly lower biomass values than control sites. In Rio Branco (ten years after fire), Humaitá (nine years after fire), Bonal (four years after fire) and Talismã (five years after fire) biomass was 6.71%, 13.66%, 17.89% and 22.69% lower than control sites, respectively. The total amount of biomass lost for the studied sites was 16,706.3 Mg, with an average loss of 4176.6 Mg for sites burned in 2005 and 2890 Mg for sites burned in 2010, with an average loss of 3615 Mg. Fire impact associated with tree mortality was clearly detected using LiDAR data up to ten years after the fire event. This study indicates that fire disturbance in the Amazon region can cause persistent above-ground biomass loss and subsequent reduction of forest carbon stocks. Continuous monitoring of burned forests is required for depicting the long-term recovery trajectory of fire-affected Amazonian forests.

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Section: Discussionmentioning

confidence: 99%

Post-Fire Changes in Forest Biomass Retrieved by Airborne LiDAR in Amazonia

Sato

Gomes²,

Shimabukuro

et al. 2016

Remote Sensing

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“…Estes autores discutem ainda que Gymnanthes concolor suporta elevadas densidades, e que possui geralmente distribuição agrupada, resultado do mecanismo de dispersão autocórico, moldado por dispersão dos diásporos em curtas distâncias, com muitos indivíduos sendo recrutados próximos da planta mãe. Conforme já discutido por Marchesini et al (2009) e Budke et al (2010, a abrupta germinação de sementes de M. multiramea provavelmente leva a espécie a não formar banco de sementes. Além disto, o aumento do número de indivíduos, bem como da altura média dos colmos reflete no vigor da espécie em ocupar tanto áre-as de dossel contínuo, quanto áreas abertas pela morte e queda da população antiga .…”

Section: Famílias/espéciesunclassified

“…Da mesma forma, estudos abrangendo o manejo de M. multiramea, especialmente quanto ao potencial de estabelecimento de espécies arbóreas, serão cruciais para se avaliar até que ponto a presença destas espécies pode interferir na dinâmica florestal. Até o presente momento, quatro anos após a floração, frutificação e morte das populações de M. multiramea, é notório que a riqueza de espécies aumentou ao longo do tempo, corroborando outros estudos com dinâmica de bambúseas no sul da América (Holz & Veblen 2006;Rafaelle et al 2007;Marchesini et al 2009), sendo possível uma avaliação destas variáveis ao longo do tempo, sobretudo quanto à necessidade de manejo das áreas com elevada densidade desta bambúsea.…”

Section: Famílias/espéciesunclassified

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Regeneração de espécies arbóreas sob a influência de Merostachys multiramea Hack. (Poaceae) em uma floresta subtropical

2012

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ABSTRACT(Regeneration of tree species infl uenced by Merostachys multiramea Hack. (Poaceae) in a subtropical forest). Th e occurrence of bamboo species is common in several forest physiognomies, and the high abundance of these species may aff ect the regeneration of other ones. We evaluated both tree species and Merostachys multiramea Hack. recruitment in a transition area between mixed Araucaria rain forest and seasonal semideciduous forests in southern Brazil. We compared the regeneration structure of the areas evaluated two and four years aft er fl owering, fruiting and death of M. multiramea. We randomly distributed 25 100 m 2 sampling units, and surveyed all living culms of M. multiramea and tree saplings. We sampled 4,372 living bamboos and 2,918 tree saplings, belonging to 32 plant families and 75 species. Most species were classifi ed as zoochorous and canopy light-demanding. On the other hand, plant abundance revealed a greater contribution of autochorous, understory and shade-tolerant trees. M. multiramea density was higher over the four years aft er the reproductive event (p<0.05), with taller culms (p<0.01), but with the same mean number of culms (p=0.46). A NPMANOVA revealed signifi cant diff erences in composition and abundance between surveys, with higher similarity among samplings two years aft er the reproductive event of M. multiramea. We also detected higher species richness over the study period, which was found to be directly associated with the abundance of M. multiramea (p=0.002), but with lower evenness of abundance among regenerating species.

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“…A regeneração natural de espécies do componente arbustivo-arbóreo está relacionada à capacidade dessas espécies se estabelecerem e se desenvolverem em diferentes condições ambientais, tornando-as capazes de se restaurarem após distúrbios naturais ou antrópicos (MARCHESINI et al, 2009 …”

Section: Introductionunclassified