keyword
MENU ▼
Read by QxMD icon Read
search

leaf litter

keyword
https://www.readbyqxmd.com/read/28720979/first-report-of-phyllosticta-citricarpa-and-description-of-two-new-species-p-%C3%A2-paracapitalensis-and-p-%C3%A2-paracitricarpa-from-citrus-in-europe
#1
V Guarnaccia, J Z Groenewald, H Li, C Glienke, E Carstens, V Hattingh, P H Fourie, P W Crous
The genus Phyllosticta occurs worldwide, and contains numerous plant pathogenic, endophytic and saprobic species. Phyllosticta citricarpa is the causal agent of Citrus Black Spot disease (CBS), affecting fruits and leaves of several citrus hosts (Rutaceae), and can also be isolated from asymptomatic citrus tissues. Citrus Black Spot occurs in citrus-growing regions with warm summer rainfall climates, but is absent in countries of the European Union (EU). Phyllosticta capitalensis is morphologically similar to P...
June 2017: Studies in Mycology
https://www.readbyqxmd.com/read/28706573/the-effects-of-catchment-and-riparian-forest-quality-on-stream-environmental-conditions-across-a-tropical-rainforest-and-oil-palm-landscape-in-malaysian-borneo
#2
Sarah H Luke, Holly Barclay, Kawi Bidin, Vun Khen Chey, Robert M Ewers, William A Foster, Anand Nainar, Marion Pfeifer, Glen Reynolds, Edgar C Turner, Rory P D Walsh, David C Aldridge
Freshwaters provide valuable habitat and important ecosystem services but are threatened worldwide by habitat loss and degradation. In Southeast Asia, rainforest streams are particularly threatened by logging and conversion to oil palm, but we lack information on the impacts of this on freshwater environmental conditions, and the relative importance of catchment versus riparian-scale disturbance. We studied 16 streams in Sabah, Borneo, including old-growth forest, logged forest, and oil palm sites. We assessed forest quality in riparian zones and across the whole catchment and compared it with stream environmental conditions including water quality, structural complexity, and organic inputs...
June 2017: Ecohydrology: Ecosystems, Land and Water Process Interactions, Ecohydrogeomorphology
https://www.readbyqxmd.com/read/28694813/intrapopulation-genotypic-variation-of-foliar-secondary-chemistry-during-leaf-senescence-and-litter-decomposition-in-silver-birch-betula-pendula
#3
Ulla Paaso, Sarita Keski-Saari, Markku Keinänen, Heini Karvinen, Tarja Silfver, Matti Rousi, Juha Mikola
Abundant secondary metabolites, such as condensed tannins, and their interpopulation genotypic variation can remain through plant leaf senescence and affect litter decomposition. Whether the intrapopulation genotypic variation of a more diverse assortment of secondary metabolites equally persists through leaf senescence and litter decomposition is not well understood. We analyzed concentrations of intracellular phenolics, epicuticular flavonoid aglycones, epicuticular triterpenoids, condensed tannins, and lignin in green leaves, senescent leaves and partly decomposed litter of silver birch, Betula pendula...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28687764/impacts-of-increasing-typhoons-on-the-structure-and-function-of-a-subtropical-forest-reflections-of-a-changing-climate
#4
Kuo-Chuan Lin, Steven P Hamburg, Lixin Wang, Chin-Tzer Duh, Chu-Mei Huang, Chung-Te Chang, Teng-Chiu Lin
Due to their destructive and sporadic nature, it is often difficult to evaluate and predict the effects of typhoon on forest ecosystem patterns and processes. We used a 21-yr record of litterfall rates to explore the influence of typhoon frequency and intensity, along with other meteorological variables, on ecosystem dynamics in a subtropical rainforest. Over the past half century there has been an increasing frequency of strong typhoons (category 3; >49.6 m s(-1); increase of 1.5 typhoons/decade) impacting the Fushan Experimental Forest, Taiwan...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28680653/transoceanic-origin-of-microendemic-and-flightless-new-caledonian-weevils
#5
Emmanuel F A Toussaint, Rene Tänzler, Michael Balke, Alexander Riedel
The origin of the astonishing New Caledonian biota continues to fuel a heated debate among advocates of a Gondwanan relict scenario and defenders of late oceanic dispersal. Here, we study the origin of New Caledonian Trigonopterus flightless weevils using a multimarker molecular phylogeny. We infer two independent clades of species found in the archipelago. Our dating estimates suggest a Late Miocene origin of both clades long after the re-emergence of New Caledonia about 37 Ma. The estimation of ancestral ranges supports an ancestral origin of the genus in a combined region encompassing Australia and New Guinea with subsequent colonizations of New Caledonia out of New Guinea in the mid-Miocene...
June 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28679727/exposure-to-the-leaf-litter-microbiome-of-healthy-adults-protects-seedlings-from-pathogen-damage
#6
Natalie Christian, Edward Allen Herre, Luis C Mejia, Keith Clay
It is increasingly recognized that microbiota affect host health and physiology. However, it is unclear what factors shape microbiome community assembly in nature, and how microbiome assembly can be manipulated to improve host health. All plant leaves host foliar endophytic fungi, which make up a diverse, environmentally acquired fungal microbiota. Here, we experimentally manipulated assembly of the cacao tree (Theobroma cacao) fungal microbiome in nature and tested the effect of assembly outcome on host health...
July 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28675878/contrasting-habitats-but-comparable-microbial-decomposition-in-the-benthic-and-hyporheic-zone
#7
Ute Risse-Buhl, Clara Mendoza-Lera, Helge Norf, Javier Pérez, Jesús Pozo, Jeanette Schlief
Input of allochthonous leaf litter is the main carbon source for heterotrophic metabolism in low-order forested streams. A major part of this leaf litter is accumulated at benthic retention structures or buried in the hyporheic zone. As a result of hyporheic sediment characteristics, hyporheic physicochemistry differs from that of the benthic zone selecting the microbial community. The present study aimed at understanding the influence of the hydrological and physiochemical differences between the benthic and hyporheic zone on microbial leaf litter decomposition and on the structure and function of the associated microbial community...
July 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28659130/what-makes-a-successful-species-traits-facilitating-survival-in-altered-tropical-forests
#8
Mareike Hirschfeld, Mark-Oliver Rödel
BACKGROUND: Ongoing conversion, disturbance and fragmentation of tropical forests stress this ecosystem and cause the decline or disappearance of many species. Particular traits have been identified which indicate an increasing extinction risk of a species, but traits facilitating survival in altered habitats have mostly been neglected. Here we search for traits that make a species tolerant to disturbances, thus independent of pristine forests. We identify the fauna that have an increasing effect on the ecosystem and its functioning in our human-dominated landscapes...
June 28, 2017: BMC Ecology
https://www.readbyqxmd.com/read/28649350/driving-factors-and-temporal-fluctuation-of-collembola-communities-and-reproductive-mode-across-forest-types-and-regions
#9
Melanie M Pollierer, Stefan Scheu
Despite the major role of Collembola in forest soil animal food webs, ecological and evolutionary determinants of their community composition are not well understood. We investigated abundance, community structure, life forms, and reproductive mode of Collembola in four different forest types (coniferous, young managed beech, old managed beech, and unmanaged beech forests) representing different management intensities. Forest types were replicated within three regions across Germany: the Schorfheide-Chorin, the Hainich, and the Swabian Alb, differing in geology, altitude, and climate...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28640343/the-peculiar-breeding-biology-of-the-amazonian-frog-allobates-subfolionidificans-aromobatidae
#10
Jesus R D Souza, Igor L Kaefer, Albertina P Lima
Allobates subfolionidificans is a vulnerable and endemic leaf-litter frog from the state of Acre, Brazilian Amazonia. We monitored a population of A. subfolionidificans through regular censuses and mark-recapture of 181 individuals during an entire breeding season to characterize its reproductive behavior. The space use of A. subfolionidificans individuals differed between sexes, with males using smaller and more segregated spaces. Males defended territories and were aggressive against same-sex individuals, which was not the case in females...
April 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28624948/metal-release-from-contaminated-leaf-litter-and-leachate-toxicity-for-the-freshwater-crustacean-gammarus-fossarum
#11
Florence Maunoury-Danger, Vincent Felten, Clément Bojic, Fabrice Fraysse, Mar Cosin Ponce, Odile Dedourge-Geffard, Alain Geffard, François Guérold, Michael Danger
Industrialization has left large surfaces of contaminated soils, which may act as a source of pollution for contiguous ecosystems, either terrestrial or aquatic. When polluted sites are recolonized by plants, dispersion of leaf litter might represent a non-negligible source of contaminants, especially metals. To evaluate the risks associated to contaminated leaf litter dispersion in aquatic ecosystems, we first measured the dynamics of metal loss from leaf litter during a 48-h experimental leaching. We used aspen (Populus tremula L...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624939/additive-effect-of-calcium-depletion-and-low-resource-quality-on-gammarus-fossarum-crustacea-amphipoda-life-history-traits
#12
Marc Rollin, Romain Coulaud, Michael Danger, Bénédicte Sohm, Justine Flayac, Alexandre Bec, Arnaud Chaumot, Olivier Geffard, Vincent Felten
Gammarus fossarum is an often-abundant crustacean detritivore that contributes importantly to leaf litter breakdown in oligotrophic, mainly heterotrophic, headwater streams. This species requires large amounts of Ca to moult, thus allowing growth and reproduction. Because resource quality is tightly coupled to the organism's growth and physiological status, we hypothesised that low Ca concentration [Ca] and low food resource quality (low phosphorus [P] and/or reduced highly unsaturated fatty acid [HUFA] contents) would interactively impair molecular responses (gene expression) and reproduction of G...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28622366/decomposition-of-recalcitrant-carbon-under-experimental-warming-in-boreal-forest
#13
Adriana L Romero-Olivares, Steven D Allison, Kathleen K Treseder
Over the long term, soil carbon (C) storage is partly determined by decomposition rate of carbon that is slow to decompose (i.e., recalcitrant C). According to thermodynamic theory, decomposition rates of recalcitrant C might differ from those of non-recalcitrant C in their sensitivities to global warming. We decomposed leaf litter in a warming experiment in Alaskan boreal forest, and measured mass loss of recalcitrant C (lignin) vs. non-recalcitrant C (cellulose, hemicellulose, and sugars) throughout 16 months...
2017: PloS One
https://www.readbyqxmd.com/read/28611807/size-and-reproductive-traits-rather-than-leaf-economic-traits-explain-plant-community-composition-in-species-rich-annual-vegetation-along-a-gradient-of-land-use-intensity
#14
Inga Dirks, Rita Dumbur, Patrick Lienin, Michael Kleyer, José M Grünzweig
Agricultural land use imposes a major disturbance on ecosystems worldwide, thus greatly modifying the taxonomic and functional composition of plant communities. However, mechanisms of community assembly, as assessed by plant functional traits, are not well known for dryland ecosystems under agricultural disturbance. Here we investigated trait responses to disturbance intensity and availability of resources to identify the main drivers of changes in composition of semiarid communities under diverging land use intensities...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28610227/revision-and-phylogeny-of-i-hypotelus-i-erichson-a-neotropical-genus-of-minute-rove-beetles-coleoptera-staphylinidae-piestinae
#15
Sidnei Bortoluzzi, Edilson Caron, Cibele S Ribeiro-Costa
The rove beetle genus Hypotelus Erichson, 1839 is one of seven extant genera of a subfamily with a historically misinterpreted concept, status and phylogenetic position. The genus comprises minute species that have been found under the bark of trees or in leaf litter mainly in Neotropical forests. The major aim of this study was to test the monophyly of this genus based on adult morphology and to review its species. Cladistic analyses were performed and Hypotelus is a monophyletic genus supported by 8 synapomorphies and includes five new species: H...
June 7, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610161/the-amazing-diversity-of-the-genus-i-monospilus-i-sars-1862-crustacea-branchiopoda-aloninae-in-south-america
#16
Francisco Diogo R Sousa, Lourdes M A Elmoor-Loureiro, Eliana A Panarelli
The main goal of this paper is to describe three new species of the genus Monospilus Sars, 1862 (Crustacea: Cladocera). Monospilus macroerosus sp. nov. differs from other species of the genus in several peculiar morphological traits, the most striking being the presence of a saw-shaped pecten of teeth on the postabdominal claw. This species inhabits semiterrestrial habitats (wet leaf litter on hydromorphic soil from gallery forest), exhibiting adaptations related to movement and food handling in this type of habitat...
March 13, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610102/a-new-species-in-the-troglomorphic-scorpion-genus-i-troglotayosicus-i-from%C3%A2-colombia-representing-the-northernmost-known-record-for-the-genus%C3%A2-scorpiones-troglotayosicidae
#17
Ricardo Botero-Trujillo, Julio C González-Gómez, Juan C Valenzuela-Rojas, Luis F García
We describe a new scorpion species in the troglomorphic genus Troglotayosicus Lourenço, 1981 from Colombia. Troglotayosicus meijdeni sp. nov. inhabits the forest leaf litter at Rivera municipality, on the western slope of the Eastern Andes. The male of the new species remains unknown; however, this species can be distinguished from other species in the genus by the female (and juvenile) morphology. The type locality of T. meijdeni sp. nov. represents the northernmost known record for a population of Troglotayosicus, further extending the known limits of distribution of this genus, and shedding more light on the distributional range of this group of scorpions in northwestern South America...
March 22, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609910/the-dark-side-of-pumpkin-toadlet-a-new-species-of-i-brachycephalus-i-anura-brachycephalidae-from-serra-do-brigadeiro-southeastern-brazil
#18
Carla Silva Guimarães, Sofia Luz, Pedro Carvalho Rocha, Renato Neves Feio
Brachycephalus is a frog genus endemic to the Brazilian Atlantic Forest and characterized by the bright yellow-orange aposematic colors and the high degree of miniaturization. Herein, we describe a new species of Brachycephalus from Serra do Brigadeiro, Municipality of Ervália, Minas Gerais State, southeastern Brazil. Specimens were collected at high altitudes (i.e., 1266-1498 m above sea level) amidst the leaf litter. The new species is characterized by the presence of black connective tissue covering all dorsal muscles, body completely yellow-orange in life, presence of skull and post-cranial plates, large size (SVL of adults: 14...
May 1, 2017: Zootaxa
https://www.readbyqxmd.com/read/28605851/temperature-modulates-agnp-impacts-on-microbial-decomposer-activity
#19
Daniela Batista, Cláudia Pascoal, Fernanda Cássio
Silver nanoparticles (AgNP)s can have toxic effects on aquatic species and compromise important ecosystem processes. AgNP impacts have been the focus of much research, but their effects under different environmental contexts, such as the increase in global temperature are difficult to predict. The aim of this study was to evaluate the interactive effects of AgNPs and temperature on the activity and diversity of microbial decomposers of plant litter in streams. Litter-associated microbial communities were exposed in microcosms to increased concentrations of AgNPs (50 to 75000μgL(-1)) and AgNO3 (5 to 7500μgL(-1)) and kept for 21days at 10°C, 16°C and 23°C...
June 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28603248/revision-of-the-i-remaneicaris-i-i-argentina-i-group-copepoda-harpacticoida-parastenocarididae-supplementary-description-of-species-and-description-of-the-first-semi-terrestrial-i-remaneicaris-i-from-the-tropical-forest-of-southeast-mexico
#20
Paulo Henrique C Corgosinho, Nancy F Mercado-Salas, Pedro Martínez Arbizu, Edinaldo Nelson Dos Santos Silva, Terue C Kihara
Remaneicaris is a species-rich Neotropical monophyletic group, easily recognized by the synapomorphic position of the outer seta of the third exopodite of leg 4, localized at 2/3 of the outer margin. The genus, comprising 35 species in five monophyletic groups, plus R. ignotus and R. meyerabichi, retains an unusual set of plesiomorphic characters. Herein we supplement the descriptions of the species belonging to the Remaneicaris argentina-group, and describe a new species from the tropical forest of Southeast Mexico...
March 6, 2017: Zootaxa
keyword
keyword
117743
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"