Combined effect of elevated CO2 level and temperature on germination and initial growth of Montrichardia arborescens (L.) Schott (Araceae): a microcosm experiment

Lopes, Aline; Ferreira, Aurélia Bentes; Pantoja, Pauline Oliveira; Piedade, Maria Teresa Fernandez

doi:10.1007/s10750-015-2598-1

Cited by 19 publications

(18 citation statements)

References 48 publications

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“…Note that these dominations, which have been adopted for all work in these chambers, are overly cautious, since the “Extreme” condition (~4.5°C) is based on the most likely scenario for global mean temperature in the absence of mitigation, and, as noted earlier, the temperature in Manaus would increase by 6–8°C in the hottest part of the year under this scenario [ 1 ]. For more information regarding the chambers see [ 27 , 39 – 40 ]. Due to the high cost of building and maintaining chambers with real-time variations in air temperature and CO 2 , our design was not completely orthogonal (see more details in [ 41 ]).…”

Section: Methodsmentioning

confidence: 99%

Effects of increasing temperature and, CO2 on quality of litter, shredders, and microorganisms in Amazonian aquatic systems

et al. 2017

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Climate change may affect the chemical composition of riparian leaf litter and, aquatic organisms and, consequently, leaf breakdown. We evaluated the effects of different scenarios combining increased temperature and carbon dioxide (CO2) on leaf detritus of Hevea spruceana (Benth) Müll. and decomposers (insect shredders and microorganisms). We hypothesized that simulated climate change (warming and elevated CO2) would: i) decrease leaf-litter quality, ii) decrease survival and leaf breakdown by shredders, and iii) increase microbial leaf breakdown and fungal biomass. We performed the experiment in four microcosm chambers that simulated air temperature and CO2 changes in relation to a real-time control tracking current conditions in Manaus, Amazonas, Brazil. The experiment lasted seven days. During the experiment mean air temperature and CO2 concentration ranged from 26.96 ± 0.98ºC and 537.86 ± 18.36 ppmv in the control to 31.75 ± 0.50ºC and 1636.96 ± 17.99 ppmv in the extreme chamber, respectively. However, phosphorus concentration in the leaf litter decreased with warming and elevated CO2. Leaf quality (percentage of carbon, nitrogen, phosphorus, cellulose and lignin) was not influenced by soil flooding. Fungal biomass and microbial leaf breakdown were positively influenced by temperature and CO2 increase and reached their highest values in the intermediate condition. Both total and shredder leaf breakdown, and shredder survival rate were similar among all climatic conditions. Thus, low leaf-litter quality due to climate change and higher leaf breakdown under intermediate conditions may indicate an increase of riparian metabolism due to temperature and CO2 increase, highlighting the risk (e.g., decreased productivity) of global warming for tropical streams.

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Section: Methodsmentioning

confidence: 99%

Effects of increasing temperature and, CO2 on quality of litter, shredders, and microorganisms in Amazonian aquatic systems

et al. 2017

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“…The rising CO 2 concentration may induce global warming [ 9 , 11 – 13 ], and it has had direct impacts on the structure and function of ecosystems, including effects on tree physiology and growth [ 4 , 14 – 16 ]. For example, plant biomass increases under elevated CO 2 conditions [ 16 , 17 ], as does forest productivity [ 1 , 18 ], and there have been changes in the C dynamics of various ecosystems under these conditions [ 19 , 20 ]. An increasing CO 2 concentration has increased the total amount of C cycling and distorted the global C balance in ecosystems [ 1 , 2 , 5 – 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies that have focused on aboveground tree responses have shown that CO 2 enrichment can lead to differences in forest ecosystem structure and function through direct effects on tree physiology and growth [ 4 , 14 – 16 ], changes in C cycling [ 19 , 20 ], and possible shifts in climate [ 9 , 11 – 13 ]. Moreover, elevated CO 2 levels can affect litter quality by altering the nutrient concentrations of plant tissue.…”

Section: Introductionmentioning

confidence: 99%

Effect of elevated atmospheric CO2 concentration on growth and leaf litter decomposition of Quercus acutissima and Fraxinus rhynchophylla

et al. 2017

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The atmospheric carbon dioxide (CO2) level is expected to increase substantially, which may change the global climate and carbon dynamics in ecosystems. We examined the effects of an elevated atmospheric CO2 level on the growth of Quercus acutissima and Fraxinus rhynchophylla seedlings. We investigated changes in the chemical composition of leaf litter, as well as litter decomposition. Q. acutissima and F. rhynchophylla did not show differences in dry weight between ambient CO2 and enriched CO2 treatments, but they exhibited different patterns of carbon allocation, namely, lower shoot/root ratio (S/R) and decreased specific leaf area (SLA) under CO2-enriched conditions. The elevated CO2 concentration significantly reduced the nitrogen concentration in leaf litter while increasing lignin concentrations and carbon/nitrogen (C/N) and lignin/N ratios. The microbial biomass associated with decomposing Q. acutissima leaf litter was suppressed in CO2 enrichment chambers, while that of F. rhynchophylla was not. The leaf litter of Q. acutissima from the CO2-enriched chambers, in contrast with F. rhynchophylla, contained much lower nutrient concentrations than that of the litter in the ambient air chambers. Consequently, poorer litter quality suppressed decomposition.

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“…Moreover, they influence the hydrological, geomorphological and abiotic environmental characteristics (Gurnell et al., ; Jeppesen, Søndergaard, Søndergaard, & Christoffersen, ; Madsen, Chambers, James, Koch, & Westlake, ; Wood et al., ). Despite their value, freshwater macrophytes are globally threatened by climate change and by the introduction of alien species that represent a risk to the conservation of both aquatic plants and the ecosystems where they are found (Lopes, Ferreira, Pantoja, Parolin, & Piedade, ; O'Hare et al., ; Zhang et al., ). From the perspective of applied ecology, knowing the patterns in biodiversity, including its alpha and beta components, is essential for accurate management and conservation of macrophytes and their ecosystem services as well as for environmental assessments in response to human changes.…”

Section: Introductionmentioning

confidence: 99%

The importance of local environmental, hydrogeomorphological and spatial variables for beta diversity of macrophyte assemblages in a Neotropical floodplain

Schneider

Cunha

Espínola

et al. 2019

J Vegetation Science

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Questions Understanding the processes that determine the variation in community composition (β‐diversity) is a major challenge in ecology, evolution, and conservation. Here we assess the importance of abiotic variables associated with local environmental features, hydrogeomorphology, and space to explain β‐diversity patterns in macrophytes by addressing the following questions: (1) Which are the sets of environmental, hydrogeomorphological, and spatial variables that contribute significantly to the spatial variation of macrophytes? (2) Which are their relative contributions to explaining the total β‐diversity, nestedness and turnover of macrophyte assemblages? Study Site Middle Paraná River floodplain, Argentina. Methods We sampled 20 lakes at low and high water levels in the Middle Paraná River floodplain. To investigate the relationship of total β‐diversity, turnover and nestedness with explanatory variables, we used the constrained analysis of principal coordinates (CAP). We used variation partitioning to assess the proportion of the variation related to each subset of variables (environmental, hydrogeomorphological and spatial). Results Among four alternatives considered to explain the spatial structure, the distance between lakes by watercourses best described the spatial organization of β‐diversity. Species turnover was largely explained by hydrogeomorphological variables, followed by spatial descriptors, whereas nestedness was exclusively related to spatial variables. Conclusions In the Middle Paraná River floodplain β‐diversity of macrophyte communities is partly shaped by turnover (mainly driven by the hydrogeomorphology of the floodplain) and nestedness (resulting from dispersal limitation by watercourses), but it also seems to be randomly organized (possibly because of random colonization and extinction, due to disturbances such as floods). Our work indicates that environmental pressures reflect differences between macrophyte communities of lakes with different geomorphological and hydrographical conditions. This suggests that certain ecological processes (such as species sorting) are driven at a higher degree by hydrogeomorphology than by local environment.

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Combined effect of elevated CO2 level and temperature on germination and initial growth of Montrichardia arborescens (L.) Schott (Araceae): a microcosm experiment

Cited by 19 publications

References 48 publications

Effects of increasing temperature and, CO2 on quality of litter, shredders, and microorganisms in Amazonian aquatic systems

Effects of increasing temperature and, CO2 on quality of litter, shredders, and microorganisms in Amazonian aquatic systems

Effect of elevated atmospheric CO2 concentration on growth and leaf litter decomposition of Quercus acutissima and Fraxinus rhynchophylla

The importance of local environmental, hydrogeomorphological and spatial variables for beta diversity of macrophyte assemblages in a Neotropical floodplain

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