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https://www.readbyqxmd.com/read/28812698/urbanization-erodes-ectomycorrhizal-fungal-diversity-and-may-cause-microbial-communities-to-converge
#1
Dietrich J Epp Schmidt, Richard Pouyat, Katalin Szlavecz, Heikki Setälä, D Johan Kotze, Ian Yesilonis, Sarel Cilliers, Erzsébet Hornung, Miklós Dombos, Stephanie A Yarwood
Urbanization alters the physicochemical environment, introduces non-native species and causes ecosystem characteristics to converge. It has been speculated that these alterations contribute to loss of regional and global biodiversity, but so far most urban studies have assessed macro-organisms and reported mixed evidence for biodiversity loss. We studied five cities on three continents to assess the global convergence of urban soil microbial communities. We determined the extent to which communities of bacteria, archaea and fungi are geographically distributed, and to what extent urbanization acts as a filter on species diversity...
April 10, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812627/direct-observation-of-increasing-recovery-length-before-collapse-of-a-marine-benthic-ecosystem
#2
Luca Rindi, Martina Dal Bello, Lei Dai, Jeff Gore, Lisandro Benedetti-Cecchi
Ecosystems can experience catastrophic transitions to alternative states, yet recent results have suggested that slowing down in rates of recovery after a perturbation may provide advance warning that a critical transition is approaching. Perturbation experiments with microbial populations have supported this hypothesis under controlled laboratory conditions, but evidence from natural ecosystems remains rare. Here, we manipulated rocky intertidal canopy algae to test the hypothesis that the spatial scale at which the system recovers from a perturbation in space should increase as the system approaches the tipping point, marking the transition from a canopy-dominated to a turf-dominated state...
May 8, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812040/effect-of-changes-in-artificial-turf-on-sports-injuries-in-male-university-soccer-players
#3
Kohei Fujitaka, Akira Taniguchi, Tsukasa Kumai, Shingo Otuki, Mamoru Okubo, Yasuhito Tanaka
BACKGROUND: Studies comparing the types and severity of trauma and injuries caused by different types of field surfaces have been conducted. However, there have been no studies on sports injuries caused by temporal deterioration of long-pile artificial turf fields and related decreases in the rubber chip and silica sand infill. PURPOSE: To investigate the influence of an artificial turf field on sports injuries in a university soccer team. STUDY DESIGN: Descriptive epidemiological study...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28783791/deficit-irrigation-and-fertility-effects-on-no3-n-exports-from-st-augustinegrass
#4
Charles H Fontanier, Jacqueline A Aitkenhead-Peterson, Benjamin G Wherley, Richard H White, James C Thomas, Phil Dwyer
Proper management of turfgrass systems is critical for reducing the risk of nutrient loss and protecting urban surface waters. In the southern United States, irrigation can be the most significant management practice regulating the biogeochemical and hydrological cycles of turfgrass systems. A turfgrass runoff research facility was used to assess the effects of deficit irrigation and fertilizer applications on turfgrass canopy cover and nitrate-N (NO-N) exports in runoff from St. Augustinegrass [Stenotaphrum secundatum (Walt...
July 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28761791/mortality-recovery-and-community-shifts-of-scleractinian-corals-in-puerto-rico-one-decade-after-the-2005-regional-bleaching-event
#5
Jorge R García-Sais, Stacey M Williams, Ali Amirrezvani
This work analyzes the mortality, recovery, and shifts in the composition of scleractinian corals from Puerto Rico one decade after the 2005 regional coral bleaching event. Temporal and spatial patterns of coral community structure were examined using a stratified, non-random sampling approach based on five permanent transects per reef at 16 reef stations. A negative correlation between percent coral cover loss and light attenuation coefficient (Kd490) was observed, suggesting that light attenuation, as influenced by water turbidity and depth, played a major role in coral protection during the bleaching event ("sunblock effect")...
2017: PeerJ
https://www.readbyqxmd.com/read/28750041/comparison-of-growth-and-physiological-characteristics-between-roughstalk-bluegrass-and-tall-fescue-in-response-to-simulated-waterlogging
#6
Mingyang Liu, Andrew Hulting, Carol Mallory-Smith
Roughstalk bluegrass (Poa trivialis) is a weed in cool season grass seed production fields in Oregon. Populations of this weed are often greater in fields prone to waterlogging. A greenhouse study was conducted to investigate the morphological and physiological differences between recently established roughstalk bluegrass and tall fescue (Lolium arundinaceum) plants in response to simulated waterlogging. Differences in root morphological development and root respiration were found between waterlogged tall fescue and roughstalk bluegrass...
2017: PloS One
https://www.readbyqxmd.com/read/28744300/metabolic-effects-of-acibenzolar-s-methyl-for-improving-heat-or-drought-stress-in-creeping-bentgrass
#7
David Jespersen, Jingjin Yu, Bingru Huang
Acibenzolar-S-methyl (ASM) is a synthetic functional analog of salicylic acid which can induce systemic acquired resistance in plants, but its effects on abiotic stress tolerance is not well known. The objectives of this study were to examine effects of acibenzolar-S-methyl on heat or drought tolerance in creeping bentgrass (Agrostis stolonifera) and to determine major ASM-responsive metabolites and proteins associated with enhanced abiotic stress tolerance. Creeping bentgrass plants (cv. 'Penncross') were foliarly sprayed with ASM and were exposed to non-stress (20/15°C day/night), heat stress (35/30°C), or drought conditions (by withholding irrigation) in controlled-environment growth chambers...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28733994/seasonal-recruitment-and-survival-strategies-of-palisada-cervicornis-comb-nov-ceramiales-rhodophyta-in-coral-reefs
#8
Ligia Collado-Vides, Alain Duran, Elizabeth Armenis, Valéria Cassano, Deron Burkepile, Andrew A Shantz, Laura Palma, Jhoana Díaz-Larrea, Abel Sentíes, Mutue Toyota Fujii
As marine tropical ecosystems deteriorate and lose biodiversity, their communities are shifting to being dominated by a few species, altering ecosystem's functioning and services. Macroalgae are becoming dominant on coral reefs, and are frequently observed outcompeting corals. Turf algal assemblages are the base of energy flow in these systems and one of the most abundant types of macroalgae on coral reefs, but little is known about their biology and diversity. Through molecular and morphological analyses, we identified the turf-forming species Laurencia cervicornis, and by studying seasonal recruitment and the impact of herbivorous fishes on its abundance, we describe its survival strategy...
July 22, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28726711/the-use-of-constructed-wetlands-for-the-treatment-and-reuse-of-urban-wastewater-for-the-irrigation-of-two-warm-season-turfgrass-species-under-mediterranean-climatic-conditions
#9
Mario Licata, Teresa Tuttolomondo, Claudio Leto, Salvatore La Bella, Giuseppe Virga
Constructed wetlands (CWs) represent low-cost technology for the treatment and reuse of wastewater in urban areas. This study aimed to evaluate the pollutant removal efficiency of a CW system and to assess the effects of irrigation using treated urban wastewater on soil and on two warm-season turf species. The research was carried out in Sicily (Italy) on a pilot-scale horizontal subsurface flow system which was fed with treated urban wastewater following secondary treatment from an activated-sludge wastewater treatment plant...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28717627/the-influence-of-playing-surface-on-injury-risk-in-italian-elite-rugby-players
#10
Riccardo Maria Lanzetti, Domenico Lupariello, Teresa Venditto, Pierpaolo Rota, Matteo Guzzini, Antonio Vadalà, Attilio Rota, Andrea Ferretti
BACKGROUND: There is a growing interest in the use of artificial turf surfaces in rugby. In particular, artificial surfaces may be an useful means of increasing participation in the sport by allowing greater usage of a given pitch, especially in regions where natural turf pitches are difficult to maintain. METHODS: The incidence of site, nature, cause, and severity of training and match injuries was prospectively recorded in two professional teams (one equipped with World Rugby certified third generation artificial turf and the other with natural grass over the 2014-2015 season)...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28713455/a-pilot-study-of-the-effect-of-outsole-hardness-on-lower-limb-kinematics-and-kinetics-during-soccer-related-movements
#11
Dong Sun, Qichang Mei, Julien S Baker, Xuewen Jia, Yaodong Gu
The purpose of this study was to investigate the effect of different outsole hardness of turf cleats shoes on the lower limb kinematics and kinetics of soccer players playing on artificial turf. The participants were required to complete tasks of straight running and 45° left sidestep cutting movements, respectively, at the speed of 4.5 ± 0.2 m/s on artificial turf. They were asked to randomly select turf cleats shoes with a soft outsole (SO), medium hardness outsole (MO) and hard outsole (HO). During the stance phase of straight running, peak pressure and force-time integral in medial forefoot (MFF) of players wearing cleats shoes with MO were significantly higher than those wearing cleats shoes with SO...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28684897/influence-of-cleats-surface-interaction-on-the-performance-and-risk-of-injury-in-soccer-a-systematic-review
#12
REVIEW
Diogo C F Silva, Rubim Santos, João Paulo Vilas-Boas, Rui Macedo, António Mesquita Montes, Andreia S P Sousa
OBJECTIVE: To review the influence of cleats-surface interaction on the performance and risk of injury in soccer athletes. DESIGN: Systematic review. DATA SOURCES: Scopus, Web of science, PubMed, and B-on. ELIGIBILITY CRITERIA: Full experimental and original papers, written in English that studied the influence of soccer cleats on sports performance and injury risk in artificial or natural grass. RESULTS: Twenty-three articles were included in this review: nine related to performance and fourteen to injury risk...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28680431/transcriptional-profiling-and-identification-of-heat-responsive-genes-in-perennial-ryegrass-by-rna-sequencing
#13
Kehua Wang, Yanrong Liu, Jinli Tian, Kunyong Huang, Tianran Shi, Xiaoxia Dai, Wanjun Zhang
Perennial ryegrass (Lolium perenne) is one of the most widely used forage and turf grasses in the world due to its desirable agronomic qualities. However, as a cool-season perennial grass species, high temperature is a major factor limiting its performance in warmer and transition regions. In this study, a de novo transcriptome was generated using a cDNA library constructed from perennial ryegrass leaves subjected to short-term heat stress treatment. Then the expression profiling and identification of perennial ryegrass heat response genes by digital gene expression analyses was performed...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28666013/exploitation-rates-of-two-benthic-resources-across-management-regimes-in-central-chile-evidence-of-illegal-fishing-in-artisanal-fisheries-operating-in-open-access-areas
#14
Miguel Andreu-Cazenave, Maria Dulce Subida, Miriam Fernandez
There is an urgent need to quantify the impacts of artisanal fisheries and define management practices that allow for the recovery and conservation of exploited stocks. The extent of illegal catch is particularly critical as a driver of overexploitation in artisanal fisheries. However, the lack of data at proper spatial scales limits the evaluation of illegal fishing and effectiveness of management practices. We used a catch curve analysis to estimate total instantaneous mortality as a proxy of fishing pressure in the artisanal benthic fishery in central Chile...
2017: PloS One
https://www.readbyqxmd.com/read/28659932/seaweed-extracts-enhance-salam-turfgrass-performance-during-prolonged-irrigation-intervals-and-saline-shock
#15
Hosam O Elansary, Kowiyou Yessoufou, Amal M E Abdel-Hamid, Mohamed A El-Esawi, Hayssam M Ali, Mohamed S Elshikh
The negative effects of the ongoing climate change include unusual prolonged droughts and increased salinity pressures on the agricultural lands. Consequently, crops are facing unprecedented environmental pressure, and this calls for more research toward controlling such major stresses. The current study investigates the effects of seaweed extract sprays of Ascophyllum nodosum (5 and 7 mL·L(-1); 6 day intervals) on Paspalum vaginatum Salam' during prolonged irrigation intervals (2 and 6 day) and saline growing conditions (1 and 49...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28658077/pitch-size-and-game-surface-in-different-small-sided-games-global-indicators-activity-profile-and-acceleration-of-female-soccer-players
#16
Jorge López-Fernández, Leonor Gallardo, Álvaro Fernández-Luna, Victor Villacañas, Jorge García-Unanue, Javier Sánchez-Sánchez
The aim of this research was to evaluate the influence of game surface and pitch size on the movement profile in female soccer players during Small-Sided-Games (SSGs) of 4 v 4. 16 women played three different 4-a-side (400 m, 600 m and 800 m) on three surfaces (ground [GR], artificial turf [AT] and natural grass [NG]). Time-motion variables were assessed through GPS devices (Spi Pro X, GPSports, Australia). GR had the worst outputs on most variables. NG achieved higher results than AT in terms of total distance [SSG 400 (+37...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28635628/identification-and-validation-of-reference-genes-for-seashore-paspalum-response-to-abiotic-stresses
#17
Yu Liu, Jun Liu, Lei Xu, Hui Lai, Yu Chen, Zhimin Yang, Bingru Huang
Seashore paspalum (Paspalum vaginatum) is among the most salt- and cadmium-tolerant warm-season perennial grass species widely used as turf or forage. The objective of this study was to select stable reference genes for quantitative real-time polymerase chain reaction (qRT-PCR) analysis of seashore paspalum in response to four abiotic stresses. The stability of 12 potential reference genes was evaluated by four programs (geNorm, NormFinder, BestKeeper, and RefFinder). U2AF combined with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) showed stable expression in Cd-treated leaves and cold-treated roots...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28632050/effects-of-turf-and-cleat-footwear-on-plantar-load-distributions-in-adolescent-american-football-players-during-resisted-pushing
#18
Jeffrey B Taylor, Anh-Dung Nguyen, Janet R Griffin, Kevin R Ford
Metatarsal and midfoot injuries are common in American football. Footwear design may influence injury rates by altering plantar foot loading patterns in these regions. The purpose of this study was to determine the effect of cleat design on in-shoe plantar foot loading during a football-specific, resisted pushing task. Twenty competitive football players (age 14.7 ± 1.8 years, height 1.72 ± 0.10 m, and mass 71.8 ± 26.9 kg) completed three trials of pushing a weighted sled at maximal effort in a standard shoe (CLEAT) and artificial turf-specific shoe (TURF), with flexible in-shoe force measuring insoles...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632048/effects-of-structural-components-of-artificial-turf-on-the-transmission-of-impacts-in-football-players
#19
Alberto Encarnación-Martínez, Antonio García-Gallart, Ana M Gallardo, Juan A Sánchez-Sáez, Javier Sánchez-Sánchez
The third generation of artificial turf systems (ATS) has matched the mechanical behaviour of natural grass, but today a high heterogeneity at structural level and mechanical behaviour in the new ATS also exists. The objective was to analyse the effect of the structural components of ATS football pitches and running speed on the capacity of impact attenuation. A total of 12 athletes were evaluated at three speed conditions (3.33 m/s, 4 m/s and maximum speed) on four different ATS, classifying them by their components (length of fibre, type of in-fill and sub-base)...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28617627/effect-of-position-time-in-the-season-and-playing-surface-on-achilles-tendon-ruptures-in-nfl-games-a-2009-10-to-2016-17-review
#20
Michael K Krill, James R Borchers, Joshua T Hoffman, Matthew L Krill, Timothy E Hewett
OBJECTIVES: Achilles tendon (AT) ruptures are a potentially career-altering and ending injury. Achilles tendon ruptures have a below average return-to-play rate compared to other common orthopaedic procedures for National Football League (NFL) players. The objective of this study was to monitor the incidence and injury rates (IR) of AT ruptures that occurred during the regular season in order to evaluate the influence of player position, time of injury, and playing surface on rupture rates...
June 22, 2017: Physician and Sportsmedicine
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