Aboveground net primary productivity in tropical forest regrowth increases following wetter dry-seasons

Vasconcelos, S. S.; Zarin, Daniel J.; Araújo, Maristela Machado; Miranda, Izildinha Souza

doi:10.1016/j.foreco.2012.03.034

Cited by 21 publications

(24 citation statements)

References 39 publications

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“…Seasonal detrended time series of climate and productivity variables: dry days (DD), multivariate ENSO index (MEI), mean monthly maximum temperature (T max ), bulk precipitation (BP), mean annual leaf area index (LAI), mean monthly minimum temperature (T min ), as well as monthly means of litterfall (LF), canopy production (CP), wood production (WP), and aboveground net primary production (ANPP) recorded during the period 2006-2013 at primary ridge forest (PRi; red bars), primary ravine forest (PRa; blue bars), and secondary ravine forest (SRa; green bars) located in southwestern Costa Rica. The levels of significant variation in time series are indicated by asterisks (***, p < 0.001; **, p < 0.01; *, p < 0.05; degree sign, p < 0.1; n.s., nonsignificant) and were calculated from seasonal detrended variables using linear mixed effects models (see Table S3 [ Vasconcelos et al, 2012]. Supporting this finding, it has been demonstrated that there exists a substantial decoupling between the irradiance driven leaf renewal and the water-driven wood production, triggering a temporal asynchronism in leaf and wood production in tropical forests [Wagner et al, 2013].…”

Section: Sensitivity Of Lowland Anpp Components To Climate Anomaliesmentioning

confidence: 76%

Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica

Hofhansl

Köbler

Ofner

et al. 2014

Global Biogeochemical Cycles

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The productivity of tropical forests is driven by climate (precipitation, temperature, and light) and soil fertility (geology and topography). While large-scale drivers of tropical productivity are well established, knowledge on the sensitivity of tropical lowland net primary production to climate anomalies remains scarce. We here analyze seven consecutive years of monthly recorded tropical forest aboveground net primary production (ANPP) in response to a recent El Niño-Southern Oscillation (ENSO) anomaly. The ENSO transition period resulted in increased temperatures and decreased precipitation during the El Niño dry period, causing a decrease in ANPP. However, the subsequent La Niña wet period caused strong increases in ANPP such that drought-induced reductions were overcompensated. Most strikingly, the climatic controls differed between canopy production (CP) and wood production (WP). Whereas CP showed strong seasonal variation but was not affected by ENSO, WP decreased significantly in response to a 3°C increase in annual maximum temperatures during the El Niño period but subsequently recovered to above predrought levels during the La Niña period. Moreover, the climate sensitivity of tropical forest ANPP components was affected by local topography (water availability) and disturbance history (species composition). Our results suggest that projected increases in temperature and dry season length could impact tropical carbon sequestration by shifting ANPP partitioning toward decreased WP, thus decreasing the carbon storage of highly productive lowland forests. We conclude that the impact of climate anomalies on tropical forest productivity is strongly related to local site characteristics and will therefore likely prevent uniform responses of tropical lowland forests to projected global changes.

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Section: Sensitivity Of Lowland Anpp Components To Climate Anomaliesmentioning

confidence: 76%

Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica

Hofhansl

Köbler

Ofner

et al. 2014

Global Biogeochemical Cycles

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“…Some previous research has addressed how past land uses [24] and natural conditions influence forest regeneration, such as climate factors [25] and soil fertility [26]. However, further research is needed to help elucidate the positive or negative influence of factors, such as previous land-use intensity, the availability of nearby forests to act as a source for seeds, the use of different species of nurse trees and how to adapt restoration to suit particular ecological contexts, such as forests on white-sand soils, steep slopes and in riparian areas.…”

Section: Understanding Of Historical Geographical and Ecological Aspmentioning

confidence: 99%

Challenges of Governing Second-Growth Forests: A Case Study from the Brazilian Amazonian State of Pará

Vieira

Gardner

Ferreira

et al. 2014

Forests

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Despite the growing ecological and social importance of second-growth and regenerating forests across much of the world, significant inconsistencies remain in the legal framework governing these forests in many tropical countries and elsewhere. Such inconsistencies and uncertainties undermine attempts to improve both the transparency and sustainability of management regimes. Here, we present a case-study overview of some of the main challenges facing the governance of second-growth forests and the forest restoration process in the Brazilian Amazon, with a focus on the state of Pará, which is both the most populous state in the Amazon and the state with the highest rates of deforestation in recent years. First, we briefly review the history of environmental governance in Brazil that has led to the current system of legislation governing second-growth forests and the forest restoration process in Pará. Next, we draw on this review to examine the kinds of legislative and operational impediments that stand in the way of the development and implementation of a more effective governance system. In particular, we highlight problems created by significant ambiguities in legal terminology and OPEN ACCESSForests 2014, 5 1738 inconsistencies in guidance given across different levels of government. We also outline some persistent problems with the implementation of legal guidance, including the need to understand local biophysical factors in order to guide an effective restoration program, as well as difficulties presented by access to technical assistance, institutional support and financial resources for the establishment and monitoring of both existing secondary forests and newly regenerating areas of forest. Whilst we focus here on a Brazilian case study, we suggest that these kinds of impediments to the good governance of second-growth forests are commonplace and require more concerted attention from researchers, managers and policy makers.

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“…Dry season irrigation in dry tropical forests has increased various biogeochemical processes, such as litter decomposition (Vasconcelos, Zarin, da Rosa, de Assis Oliveira, & de Carvalho, ; Wieder & Wright, ) and aboveground productivity (Vasconcelos, Zarin, Araujo, & I. d. S. Miranda., ; Wilson, Marra, & Sillett, ). However, there are few studies directly exploring the effects of seasonal precipitation changes on soil respiration (Allen et al, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest

Chen

et al. 2019

Ecology and Evolution

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Precipitation is projected to change intensity and seasonal regime under current global projections. However, little is known about how seasonal precipitation changes will affect soil respiration, especially in seasonally dry tropical forests. In a seasonally dry tropical forest in South China, we conducted a precipitation manipulation experiment to simulate a delayed wet season (DW) and a wetter wet season (WW) over a three-year period. In DW, we reduced 60% throughfall in April and May to delay the onset of the wet season and irrigated the same amount water into the plots in October and November to extend the end of the wet season. In WW, we irrigated 25% annual precipitation into plots in July and August. A control treatment (CT) receiving ambient precipitation was also established. Compared with CT, DW significantly increased soil moisture by 54% during October to November, and by 30% during December to April. The treatment of WW did not significantly affect monthly measured soil moisture. In 2015, DW significantly increased leaf area index and soil microbial biomass but decreased fine root biomass. In contrast, WW significantly decreased fine root biomass and forest floor litter stocks. Soil respiration was not affected by DW, which could be attributed to the increased microbial biomass offsetting the decrease in fine root biomass. In contrast, WW significantly increased soil respiration from 3.40 to 3.90 μmol m −2 s −1 in the third year, mainly due to the increased litter decomposition and soil pH (from 4.48 to 4.68). The present study suggests that both a delayed wet season and a wetter wet season will have significant impacts on soil respiration-associated ecosystem components. However, the ecosystem components can respond in different directions to the same change in precipitation, which ultimately affected soil respiration. K E Y W O R D S climate change, precipitation regime, rainfall change, soil CO 2 , tropics S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Yu S, Mo Q, Chen Y, et al. Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest. Ecol Evol. 2020;10:467-479.

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Aboveground net primary productivity in tropical forest regrowth increases following wetter dry-seasons

Abstract: 2016-12-23T18:52:10

Cited by 21 publications

References 39 publications

Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica

Sensitivity of tropical forest aboveground productivity to climate anomalies in SW Costa Rica

Challenges of Governing Second-Growth Forests: A Case Study from the Brazilian Amazonian State of Pará

Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest

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