Variation on water quality of Kerangas forest streams due to invasion of Acacia

Environmental Monitoring and Assessment, Journal Year: 2025, Volume and Issue: 197(3)

Published: Feb. 13, 2025

Language: Английский

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The soil response in experimental Leucaena leucocephala plots under manipulated rainfall regimes

Tropical Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

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Canopy Gaps Control Litter Decomposition and Nutrient Release in Subtropical Forests

Forests, Journal Year: 2023, Volume and Issue: 14(4), P. 673 - 673

Published: March 24, 2023

The formation of a canopy gap results in changes to the microenvironment which, turn, affect litter decomposition and nutrient release. However, mechanisms underlying these effects differently sized gaps non-gaps remain poorly understood. To address this knowledge, we selected three large (above 150 m2), medium (50–100 small (30–50 with basically same site conditions. We then used bag method investigate leaf branch over year Castanopsis kawakamii natural forest aim characterizing mass remaining release non-gaps. Our revealed that was lower compared other gaps, decomposed faster than litter. Environmental factors were identified as primary drivers total carbon nitrogen during decomposition. Gap size (canopy openness), taxonomic Margalef index, Brillouin index soil microbes, content, pH value, average air temperature main driving from In late stage, Pielou potassium water relative humidity content also found be affecting throughout different stages Overall, our study highlights impact on microenvironmental variation, community diversity, microbial functional diversity how ultimately influence findings provide an important foundation for further research into cycling subtropical forests.

Language: Английский

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Estudos em Biociências e Biotecnologia: Desafios, Avanços e Possibilidades II

Editora Artemis eBooks, Journal Year: 2023, Volume and Issue: unknown

Published: May 29, 2023

capítulos 3 a 6); produção e proteção de alimentos (capítulos 7 9); ambiente biorrecursos 10 12).

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Dieback and Replacement of Riparian Trees May Impact Stream Ecosystem Functioning

Microbial Ecology, Journal Year: 2024, Volume and Issue: 87(1)

Published: Jan. 16, 2024

Abstract Alders are nitrogen (N)-fixing riparian trees that promote leaf litter decomposition in streams through their high-nutrient inputs. While alders widespread across Europe, populations at risk due to infection by the oomycete Phytophthora × alni , which causes alder dieback. Moreover, death opens a space for establishment of an aggressive N-fixing invasive species, black locust ( Robinia pseudoacacia ). Shifts from vegetation containing healthy infected and, eventually, loss and replacement with may alter key process associated microbial decomposer assemblages. We examined this question microcosm experiment comparing three types mixtures: one representing original forest composed Alnus lusitanica ), ash Fraxinus angustifolia poplar Populus nigra ); same species composition where had been P. ; replaced locust. The lasted six weeks, every two microbially driven decomposition, fungal biomass, reproduction, assemblage structure were measured. Decomposition was highest mixtures lowest locust, reflecting differences nutrient concentrations. Mixtures showed distinct assemblages higher sporulation rates than Our results indicate its stream ecosystem processes assemblages, important changes already occurring during infection. This highlights importance maintaining heathy forests preserve proper functioning.

Language: Английский

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Litter Quality Is a Stronger Driver than Temperature of Early Microbial Decomposition in Oligotrophic Streams: a Microcosm Study

Microbial Ecology, Journal Year: 2021, Volume and Issue: 82(4), P. 897 - 908

Published: Sept. 27, 2021

Litter decomposition is an ecological process of key importance for forest headwater stream functioning, with repercussions the global carbon cycle. The directly and indirectly mediated by microbial decomposers, mostly aquatic hyphomycetes, influenced environmental biological factors such as water temperature litter quality. These two are forecasted to change globally within next few decades, in ways that may have contrasting effects on microbial-induced decomposition: while warming expected enhance performance, reduction quality due increased atmospheric dioxide community composition alteration opposite outcome. We explored this issue through a microcosm experiment focused early microbial-mediated under oligotrophic conditions, simultaneously manipulating (10 °C 15 °C) (12 broadleaf plant species classified into 4 categories based initial concentrations nitrogen tannins). assessed potential changes performance fungal decomposers (i.e., respiration, biomass accrual, sporulation rate) richness. found stronger quality, which enhanced rates, than temperature, barely any studied variables. Our results suggest poorer associated will major repercussion ecosystem functioning.

Language: Английский

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Proximity to forest plantations is associated with presence and abundance of invasive plants in landscapes of south-central Chile

NeoBiota, Journal Year: 2024, Volume and Issue: 92, P. 129 - 153

Published: April 2, 2024

Invasive plant species (IPs) are widespread in forests and cause substantial environmental, economic social impacts. They occupy native ecological niches, causing local extinctions to the detriment of biodiversity disrupting ecosystem services provision. How landscape characteristics may determine success IPs remains unclear and, more importantly, how land-use land-cover changes result spatial shifts invasion risk. Furthermore, study factors influence biological invasions has focused on particular species, but not IPs’ community. In this study, we identify assess variables that presence distribution community temperate a global hotspot south-central Chile. We fitted spatially explicit models, combining field-sampling information related land-use/land-cover, topography, climate, soil anthropogenic explain predict From whole sampling identified eight classified as IPs: three trees five shrubs. used field data from 125 500 × 2 m-transects, which registered richness, abundance basal area Distance forest plantations was variable with most distribution. Richness, were higher at shorter distances plantations. The best model explaining relationship between variables. All descriptors showed similar patterns: tree disturbed areas. Our findings contribute increasing our understanding patterns landscapes. models can be suitable tools for designing strategies prevent, mitigate or make integrated control impacts invasive

Language: Английский

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Changes in decomposition dynamics, soil community function and the growth of native seedlings under the leaf litter of two invasive plants

Biological Invasions, Journal Year: 2024, Volume and Issue: 26(11), P. 3695 - 3714

Published: Aug. 12, 2024

Language: Английский

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Effect of litter decomposition on mowing and plant composition change during Solidago stand restoration

Ecological Questions, Journal Year: 2024, Volume and Issue: 35(3), P. 1 - 13

Published: Feb. 8, 2024

Decomposition of organic matter supports important soil ecosystem services. The rate decomposition depends mostly on the type plant material being decomposed and abundance diversity organisms that process matter. Consequently, any disturbance to will affect process. Invasive plants, such as Solidago species, pose a serious ecological threat natural habitats, so effective environmentally safe methods controlling their occurrence should be developed. In this study, rates were used indicators health during grassland restoration after invasion. Different seed mixtures (grasses, grasses with legumes, seeds collected from seminatural meadow; use fresh hay no seeds) sown field experiment different mowing frequencies (1, 2 3 times per year) established. Two hypotheses tested: (1) species composition in affects litter rates, (2) regimes rates. It was found higher plots highest diversity. This indicates an increase has positive effect processes. Secondly, two three season conclusion, can tool identify adequate management.

Language: Английский

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Invasive forest pathogens affect the characteristics, microbial colonisation, and decomposition of leaf litter in streams

Freshwater Biology, Journal Year: 2021, Volume and Issue: 67(2), P. 416 - 429

Published: Nov. 24, 2021

Abstract Invasive tree pathogens threaten forests worldwide, but their effects on streams are poorly understood. Nevertheless, infections that lead to changes in the characteristics of litter inputs may affect stream communities and ecosystem processes. We studied cross‐ecosystem derived from Phytophthora cinnamomi , × alni Ophiostoma novo‐ulmi infection Castanea sativa (chestnut), Alnus lusitanica (alder), Ulmus minor (elm) trees, respectively, by assessing physical chemical senescent leaves healthy, symptomatic, highly symptomatic individuals. Leaf three health statuses per species was then incubated laboratory microcosms microbial decomposers leaf decomposition were assessed. Tree significantly affected characteristics, decomposition, status trees conditioned these differently depending species. In C. had higher toughness, polyphenolic concentration slower than healthy trees. A. phosphorus concentration, lower carbon:phosphorus ratio faster Finally, U. nitrogen carbon:nitrogen Effects mediated decomposer colonisation activity. The composition aquatic hyphomycetes associated with varied status. Most striking two‐fold richness infected O. alters nutritional quality litter, potentially affecting functioning ecosystems strongly dependent riparian inputs.

Language: Английский

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