scholarly journals Substrate Preference Determines Macrofungal Biogeography in the Greater Mekong Sub-Region

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 824 ◽  
Author(s):  
Ye ◽  
Li ◽  
Mortimer ◽  
Xu ◽  
Gui ◽  
...  
Keyword(s):  
Taxonomic Diversity ◽  
Plant Litter ◽  
Substrate Preference ◽  
Secondary Forests ◽  
Saprotrophic Fungi ◽  
Multiple Substrates ◽  
Substrate Preferences ◽  
Symbiotic Fungi ◽  
Greater Mekong Subregion

The availability and the quality of substrates are important drivers of macrofungal biogeography, and thus macrofungal species occurrence is potentially dependent on the availability of different substrates. However, few studies have explored the properties of macrofungal substrates and assessed the relationship between macrofungal diversity and substrate diversity at a landscape level. To address this issue, we conducted a landscape-scale survey of basidiocarp substrates in the Greater Mekong Subregion (GMS). A total of 957 macrofungal species distributed across 73 families and 189 genera were collected. Substrates of these macrofungi were categorized into four main groups (namely, litter, soil, root, and rare substrates) and referenced into 14 sub-substrate types (such as branches, leaves, and fruit). The results revealed that 50% of the observed macrofungal species were symbiotrophs living in ectomycorrhizal association with plant hosts, 30% were saprotrophs decomposing plant litter, 15% lived in soil organic matter, and 5% lived in rare substrates. The most abundant root symbiotic fungi were members of Russula, whereas most litter saprotrophic fungi belonged to Marasmius. Macrofungi commonly favored a single substrate. This specificity was not affected by changes in vegetation or climate. Less than 1% of macrofungi (e.g., Marasmius aff. maximus) could live on multiple substrates. Most of these unusual macrofungi were characterized as highly mobile and were generally found in successional areas. In secondary forests, our survey indicated that significant correlations exist between substrate preference and taxonomic diversity, reflected as higher substrate diversity generally accompanied by higher macrofungal diversity. In conclusion, substrate preference is an important factor driving macrofungal composition and distribution in the GMS. Macrofungi that thrive on multiple substrates constitute pioneer groups that have an important role in establishing macrofungal communities in new habitats. These observations have furthered our understanding of how substrate preferences could explain macrofungal biogeography.

scholarly journals Plant Litter Submergence Affects the Water Quality of a Constructed Wetland

PLoS ONE ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. e0171019 ◽  
Author(s):  
Xu Pan ◽  
Yunmei Ping ◽  
Lijuan Cui ◽  
Wei Li ◽  
Xiaodong Zhang ◽  
...  
Keyword(s):  
Water Quality ◽  
Constructed Wetland ◽  
Plant Litter

scholarly journals Contribution of Plant Litter in Fragments of Dry Tropical Forest in Paraíba

2018 ◽  
Vol 10 (12) ◽  
pp. 437 ◽  
Author(s):  
Adão Batista de Araújo ◽  
Patrícia Carneiro Souto ◽  
Jacob Silva Souto ◽  
Fabio Junho Alves da Silva ◽  
Francisco de Assis Pereira Leonardo ◽  
...  
Keyword(s):  
Climatic Variability ◽  
Organic Matter Content ◽  
Plant Litter ◽  
Matter Content ◽  
Litter Production ◽  
Rainy Period ◽  
Caatinga Vegetation ◽  
Reproductive Material ◽  
Metal Frame

Deposition of plant litter in the environment represents the entrance into the system, with reflection on soil organic matter content and environmental quality of the site. The objective of this study was to estimate the deposition, accumulation and decomposition of plant litter in preserved Caatinga vegetation, and the interference of climatic variability in the dynamics of these events. This research was developed in the Private Natural Heritage Reserve (RPPN), Tamanduá Farm, in the municipality of Santa Terezinha-PB, in a Caatinga area. Plant litter deposited in 20 twenty 1.0 m² litterfall traps of 1.0 m × 1.0 m was collected monthly (June/2014 to July/2015), covering the dry and rainy period of the region. The material was separated into leaves, branches + bark, reproductive material and miscellaneous material. Litter stock accumulated on the forest floor was quantified using a 0.5 m × 0.5 m metal frame to estimate decomposition rate of litter. We found that that leaves fraction obtained the highest deposition average in July 2014 with 395.80 kg ha-1 and the lowest in February/2015 with 9.5 kg ha-1. We concluded that that litter production obtained during the evaluation period was 2.2 mg ha-1, being the highest contribution of litter at the end of the rainy season of the region.

scholarly journals Preliminary studies of fungi in the Biebrza National Park (NE Poland). II. Macromycetes

2013 ◽  
Vol 47 (2) ◽  
pp. 235-264 ◽  
Author(s):  
Anna Kujawa ◽  
Marta Wrzosek ◽  
Grażyna Domian ◽  
Kamil Kędra ◽  
Jarosław Szkodzik ◽  
...  
Keyword(s):  
Nature Conservation ◽  
Mycorrhizal Fungi ◽  
National Park ◽  
Taxonomic Diversity ◽  
Plant Litter ◽  
Molecular Techniques ◽  
Future Research ◽  
Ecological Niches ◽  
Short Term ◽  
Ne Poland

This paper presents the second part of the results of the first short-term inventory of fungi species occurring in the Biebrza National Park and is focused on a survey of macrofungi. The total number of macrofungi found during the survey in late August 2012 was 289 taxa: 17 ascomycetes and 272 basidiomycetes, inhabiting diverse ecological niches. The identified fungi belonged to ectomycorrhizal symbionts and saprobionts decomposing wood, plant litter and animal remnants. The identity of 25 mycorrhizal fungi species has been confirmed using molecular techniques. Five species are newly reported for Poland (<em>Amanita olivaceogrisea, Lepiota lepida, Stropharia alcis, Xerocomus fennicus, X. cisalpinus</em>) and 225 taxa (79 %) were not known in the Biebrza National Park. Fifty species are endangered in Poland, of which nine species are protected by law. Data on species richness and the taxonomic diversity of the identified fungi are briefly commented in terms of their significance for nature conservation and future research.

scholarly journals Fungi exposed to chronic nitrogen enrichment are less able to decay leaf litter

2016 ◽  
Author(s):  
Linda T.A. van Diepen ◽  
Serita D. Frey ◽  
Elizabeth A. Landis ◽  
Eric W. Morrison ◽  
Anne Pringle
Keyword(s):  
Growth Rates ◽  
Common Garden ◽  
N Deposition ◽  
Plant Litter ◽  
Atmospheric N Deposition ◽  
Saprotrophic Fungi ◽  
Soil C ◽  
Litter Decay ◽  
N Enrichment

AbstractSaprotrophic fungi are the primary decomposers of plant litter in temperate forests, and their activity is critical for carbon (C) and nitrogen (N) cycling. Simulated atmospheric N deposition is associated with reduced fungal biomass, shifts in fungal community structure, slowed litter decay, and soil C accumulation. Although rarely studied, N deposition may also result in novel selective pressures on fungi, affecting evolutionary trajectories. To directly test if long-term N enrichment reshapes fungal behaviors, we isolated decomposer fungi from a longterm (28 year) N addition experiment and used a common garden approach to compare growth rates and decay abilities of isolates from control and N amended plots. Both growth and decay were significantly altered by long-term exposure to N enrichment. Changes in growth rates were idiosyncratic, but litter decay by N isolates was generally lower compared to control isolates of the same species, a response not readily reversed when N isolates were grown in control (low N) environments. Changes in fungal behaviors accompany and perhaps drive previously observed N-induced shifts in fungal diversity, community composition, and litter decay dynamics.

scholarly journals Comparison of long-chain fatty acyl-CoA synthetases from rabbit heart and liver: substrate preferences and effects of Mg2+

1997 ◽  
Vol 322 (2) ◽  
pp. 649-654 ◽  
Author(s):  
Margaret T. WEIS ◽  
Andrea BERCUTE
Keyword(s):  
Arachidonic Acid ◽  
Palmitic Acid ◽  
Liver Enzymes ◽  
Rabbit Heart ◽  
Fatty Acyl ◽  
Substrate Preference ◽  
Maximal Velocity ◽  
Substrate Preferences ◽  
Hill Plots ◽  
Long Chain

Rabbit heart has a single, non-specific, fatty acyl-CoA synthetase (HP1) which is dependent on Mg2+, apart from the requirement for MgATP2-. Two long-chain fatty acyl-CoA synthetase activities (LP1 and LP2) can be resolved by hydroxyapatite chromatography of liver preparations; the Mg2+ requirement for these enzymes is undefined. These experiments were done to define the Mg2+ requirements of the liver enzymes and to compare them with the heart enzyme. For all three sources of enzyme and for arachidonic, oleic and palmitic acid substrates, the overall velocity of the reaction increased as [Mg2+] increased. Depending on the substrate and the source of enzyme, the increase in overall velocity could be attributed to changes in affinity or maximal velocity or both. The substrate preference of the HP1 enzyme for arachidonic acid (AA) was fifth or sixth of eight substrates regardless of the concentration of Mg2+. In contrast, increasing [Mg2+] shifted the relative substrate preference of both liver enzymes for AA. At low [Mg2+], AA was ranked seventh or eighth (least preferred) of eight substrates, whereas at high [Mg2+], AA was ranked as fifth or sixth. Hill plots of competition studies were consistent with Mg2+-induced positive co-operativity in LP1, but not in HP1 or LP2. Although enzymes from the three sources exhibit substantial kinetic differences, it is uncertain whether they are three different enzymes.

Prey–predator interaction suggests sacred groves are not functionally different from neighbouring used lands

2020 ◽  
pp. 1-5
Author(s):  
M. Hariraveendra ◽  
T.P. Rajesh ◽  
Anjana P. Unni ◽  
Palatty Allesh Sinu
Keyword(s):  
Structural Complexity ◽  
Structural Similarity ◽  
Predation Rate ◽  
Secondary Forests ◽  
Sacred Groves ◽  
Bite Marks ◽  
Predation Intensity ◽  
Protected Forests ◽  
Negative Effect

Abstract Sacred groves (SG) of south India are either relics of primary or secondary forests or swamps, worshipped by the local communities, and distributed in the countrysides (CS) and forest landscapes of India. Studies suggest that SGs harbour a biodiversity different from that of adjoining CS and have a structural similarity to protected forests. Studies also suggest a negative effect of structural complexity of forests on predation. Considering these two expectations, we compared the predation of artificial caterpillars inside SGs and CSs with the hypothesis that predation will be less in SG than in CS. Examining the predation marks, we identified the likely predator and scored the intensity of predation. Bite marks of arthropods, birds, lizards and mammals were observed on caterpillars of both habitats. The predation rate and predation intensity were similar for overall predators and for each predator taxon in both habitats, despite the fact that mammal predation was mostly encountered in SGs. Because the proportion of predated caterpillars is not different between habitats and the intensity of predation is high in SGs, we conclude that SGs may not have a quality of the expected standard.

scholarly journals SOIL WORMS POPULATION IN VARIOUS LITTLE QUALITY (C, N, C / N, LIGNIN, AND POLYPHENOL) (CASE STUDY ON AGROFORESTRY LAND IN KELIMUTU NATIONAL PARK, ENDE REGENCY-INDONESIA)

2020 ◽  
Vol 8 (1) ◽  
pp. 124-130
Author(s):  
Agustinus JP Ana Ana Saga ◽  
Heny M.C. Sine ◽  
Laurensius Lehar
Keyword(s):  
Organic Matter ◽  
National Park ◽  
Agricultural Land ◽  
Agroforestry System ◽  
Agroforestry Systems ◽  
Secondary Forests ◽  
Vegetable Crops ◽  
Earthworm Biomass ◽  
Agricultural Business

The agricultural business that is applied to the agroforestry system in Kelimutu National Park causes differences in the quality of organic matter of plants and earthworm populations, which have consequences for soil environmental services. The purpose of this study is to evaluate the earthworm population and the quality of plant organic matter in various agroforestry systems, intensive agriculture, and secondary forests. Sampling of organic matter from plants and earthworms was carried out in January - July 2016 (in the rainy season) in Agroforestry land: Clove (AF - CK), Cocoa (AF - KK), Candlenut (AF - KM), Coffee (AF - KM) ) compared to intensive agricultural land (monoculture vegetable crops) and secondary forests (SPL-HS), with 3 times repetition. Variables observed were in addition to the number of earthworms found and biomass worms (monolith sampling), also observed the quality of plant organic matter (C (Walkley and black), N (Kjeldahl), Lignin, and Polyphenol (Goering and Van Soest)) (Quadrants). The survey results show that the population of earthworms in SPL-AF is as low as the population in SPL-HS, an average of 3 m-2, while in the SPL-PI the average is only 0.24 m-2. Earthworm biomass in AF is about 69% smaller than worms found in SPL-HS; average earthworm biomass in SPL-AF 15 gm-2 while in SPL-HS an average of 47 gm-2; and the smallest worm biomass found in SPL-PI averaging around 2.3 gm-2. The average quality of organic matter of C-org plants in all SSTs was 38% to 50%, the highest C-org content of AF-CK, AF-KP and SPL-HS were significantly different (p <0.05) with C levels that were others (39% on average). The N and lignin levels of all plant organic matter are the same (P> 0.05), the average is 1.36% and 41.13%, respectively. The C / N ratio in AF - CK and HS is the same at an average of 52.78% or 58 times higher than AF - KK, AF - KM, and AF - KP, the average is 31.11% The polyphenolic levels of different plant organic matter significant (p <0.05) between SPL. The highest levels of polyphenols were on average 17.5% found in plant organic matter AF - CK and SPL - HS, while plant organic matter in other fields averaged 3.4%. Plant organic matter with polyphenol content> 2% will slow decay.

scholarly journals Substrate Preferences of Ruderal Plants in Colonizing Stone Monuments of the Pasargadae World Heritage Site, Iran

2021 ◽  
Vol 13 (16) ◽  
pp. 9381
Author(s):  
Zohreh Hosseini ◽  
Giulio Zangari ◽  
Marta Carboni ◽  
Giulia Caneva
Keyword(s):  
World Heritage ◽  
World Heritage Site ◽  
Substrate Preference ◽  
Archaeological Sites ◽  
Plant Colonization ◽  
Substrate Preferences ◽  
Heritage Site ◽  
Periodic Monitoring ◽  
Management Plans ◽  
Favorable Conditions

Plant colonization on archaeological structures is limited by the substrate conditions of stone surfaces. Despite its relevance for ecological studies and the management plans of archaeological sites, the knowledge on monuments substrate (e.g., stones, microhabitats, microsites), which could be suitable sites for plant establishment, is an underestimated topic. Here, we aim to identify the substrate preference of plants in colonizing stone surfaces as a first step in evaluating the biodeterioration risk. We selected the Pasargadae World Heritage Site (WHS) for its variety of different conditions, and we assessed the substrate preference of 142 ruderal plants occurring on nine monuments, two types of stones, and eight microsites. Our data indicated that stone typology and microsite conditions affected species composition, diversity, and richness. The porosity of the different limestone and the progressive weathering phenomena resulted as relevant factors in plant colonization. Significantly, microsites as a junction of two stone blocks (M1a) and big fractures covered by soil (M3) hosted the most favorable conditions, which needed periodic monitoring during the maintenance activities of the site. Evaluating the substrate preference of ruderal plants can contribute to the identification of the high-risk areas for plant colonization, which need to be considered in the management plans of archaeological sites.

Origination and extinction components of taxonomic diversity: General problems

Paleobiology ◽  
2000 ◽  
Vol 26 (S4) ◽  
pp. 74-102 ◽  
Author(s):  
Mike Foote
Keyword(s):  
Temporal Variation ◽  
Fossil Record ◽  
Taxonomic Diversity ◽  
Set Covering ◽  
Interval Length ◽  
Marine Animals ◽  
Data Set ◽  
Extinction Rates ◽  
Single Interval

Mathematical modeling of cladogenesis and fossil preservation is used to explore the expected behavior of commonly used measures of taxonomic diversity and taxonomic rates with respect to interval length, quality of preservation, position of interval in a stratigraphic succession, and taxonomic rates themselves. Particular attention is focused on the independent estimation of origination and extinction rates. Modeling supports intuitive and empirical arguments that single-interval taxa, being especially sensitive to variation in preservation and interval length, produce many undesirable distortions of the fossil record. It may generally be preferable to base diversity and rate measures on estimated numbers of taxa extant at single points in time rather than to adjust conventional interval-based measures by discarding single-interval taxa.A combination of modeling and empirical analysis of fossil genera supports two major trends in marine animal evolution. (1) The Phanerozoic decline in taxonomic rates is unlikely to be an artifact of secular improvement in the quality of the fossil record, a point that has been argued before on different grounds. (2) The post-Paleozoic rise in diversity may be exaggerated by the essentially complete knowledge of the living fauna, but this bias is not the principal cause of the pattern. The pattern may partly reflect a secular increase in preservation nevertheless.Apparent temporal variation in taxonomic rates can be produced artificially by variation in preservation rate. Some empirical arguments suggest, however, that much of the short-term variation in taxonomic rates observed in the fossil record is real. (1) For marine animals as a whole, the quality of the fossil record of a higher taxon is not a good predictor of its apparent variability in taxonomic rates. (2) For a sample data set covering a cross-section of higher taxa in the Ordovician, most of the apparent variation in origination and extinction rates is not statistically attributable to independently measured variation in preservation rates. (3) Previous work has shown that standardized sampling to remove effects of variable preservation and sampling yields abundant temporal variation in estimated taxonomic rates. While modeling suggests which rate measures are likely to be most accurate in principle, the question of how best to capture true variation in taxonomic rates remains open.

scholarly journals Symbiotic Fungi Produce Laccases Potentially Involved in Phenol Degradation in Fungus Combs of Fungus-Growing Termites in Thailand

2005 ◽  
Vol 71 (12) ◽  
pp. 7696-7704 ◽  
Author(s):  
Yaovapa Taprab ◽  
Toru Johjima ◽  
Yoshimasa Maeda ◽  
Shigeharu Moriya ◽  
Savitr Trakulnaleamsai ◽  
...  
Keyword(s):  
Gene Product ◽  
Laccase Activity ◽  
Phenol Degradation ◽  
Plant Litter ◽  
Partial Purification ◽  
Copper Binding ◽  
Degenerate Primers ◽  
Fungus Combs ◽  
Fungus Comb ◽  
Symbiotic Fungi

ABSTRACT Fungus-growing termites efficiently decompose plant litter through their symbiotic relationship with basidiomycete fungi of the genus Termitomyces. Here, we investigated phenol-oxidizing enzymes in symbiotic fungi and fungus combs (a substrate used to cultivate symbiotic fungi) from termites belonging to the genera Macrotermes, Odontotermes, and Microtermes in Thailand, because these enzymes are potentially involved in the degradation of phenolic compounds during fungus comb aging. Laccase activity was detected in all the fungus combs examined as well as in the culture supernatants of isolated symbiotic fungi. Conversely, no peroxidase activity was detected in any of the fungus combs or the symbiotic fungal cultures. The laccase cDNA fragments were amplified directly from RNA extracted from fungus combs of five termite species and a fungal isolate using degenerate primers targeting conserved copper binding domains of basidiomycete laccases, resulting in a total of 13 putative laccase cDNA sequences being identified. The full-length sequences of the laccase cDNA and the corresponding gene, lcc1-2, were identified from the fungus comb of Macrotermes gilvus and a Termitomyces strain isolated from the same fungus comb, respectively. Partial purification of laccase from the fungus comb showed that the lcc1-2 gene product was a dominant laccase in the fungus comb. These findings indicate that the symbiotic fungus secretes laccase to the fungus comb. In addition to laccase, we report novel genes that showed a significant similarity with fungal laccases, but the gene product lacked laccase activity. Interestingly, these genes were highly expressed in symbiotic fungi of all the termite hosts examined.

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