keyword
MENU ▼
Read by QxMD icon Read
search

Ecophysiology

keyword
https://www.readbyqxmd.com/read/28813439/comparative-ecophysiology-of-a-critically-endangered-cr-ectotherm-implications-for-conservation-management
#1
Andrea F T Currylow, Angelo Mandimbihasina, Paul Gibbons, Ernest Bekarany, Craig B Stanford, Edward E Louis, Daniel E Crocker
Captive breeding is a vital conservation tool for many endangered species programs. It is often a last resort when wild animal population numbers drop to below critical minimums for natural reproduction. However, critical ecophysiological information of wild counterparts may not be well documented or understood, leading to years of minimal breeding successes. We collected endocrine and associated ecological data on a critically endangered ectotherm concurrently in the wild and in captivity over several years...
2017: PloS One
https://www.readbyqxmd.com/read/28805631/bumble-bee-ecophysiology-integrating-the-changing-environment-and-the-organism
#2
REVIEW
S Hollis Woodard
Bumble bees are among the most ecologically and economically important pollinators worldwide, yet many of their populations are being threatened by a suite of interrelated, human-mediated environmental changes. Here, I discuss recent progress in our understanding of bumble bee ecophysiology, including advances related to thermal biology in light of global warming; nutritional biology in the context of declining food resources; and the capacity for bumble bees to exhibit physiological plasticity or adaptations to novel or extreme environments, with reference to their evolutionary history and current biogeography...
August 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28780592/the-naked-mole-rat-exhibits-an-unusual-cardiac-myofilament-protein-profile-providing-new-insights-into-heart-function-of-this-naturally-subterranean-rodent
#3
Kelly M Grimes, David Y Barefield, Mohit Kumar, James W McNamara, Susan T Weintraub, Pieter P de Tombe, Sakthivel Sadayappan, Rochelle Buffenstein
The long-lived, hypoxic-tolerant naked mole-rat well-maintains cardiac function over its three-decade-long lifespan and exhibits many cardiac features atypical of similar-sized laboratory rodents. For example, they exhibit low heart rates and resting cardiac contractility, yet have a large cardiac reserve. These traits are considered ecophysiological adaptations to their dank subterranean atmosphere of low oxygen and high carbon dioxide levels and may also contribute to negligible declines in cardiac function during aging...
August 5, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28775335/nubbedb-an-updated-database-to-uncover-chemical-and-biological-information-from-brazilian-biodiversity
#4
Alan C Pilon, Marilia Valli, Alessandra C Dametto, Meri Emili F Pinto, Rafael T Freire, Ian Castro-Gamboa, Adriano D Andricopulo, Vanderlan S Bolzani
The intrinsic value of biodiversity extends beyond species diversity, genetic heritage, ecosystem variability and ecological services, such as climate regulation, water quality, nutrient cycling and the provision of reproductive habitats it is also an inexhaustible source of molecules and products beneficial to human well-being. To uncover the chemistry of Brazilian natural products, the Nuclei of Bioassays, Ecophysiology and Biosynthesis of Natural Products Database (NuBBEDB) was created as the first natural product library from Brazilian biodiversity...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28756562/life-history-written-in-blood-erythrocyte-parameters-in-a-small-hibernator-the-edible-dormouse
#5
Nadine Havenstein, Franz Langer, Joanna Fietz
The oxygen delivery system is one major determinant of the performance of vertebrates and responds sensitively to a variety of internal and environmental factors. To understand physiological mechanisms underlying variations of fitness, we investigated effects of demanding conditions associated with certain life-history events, food availability, and population density on the oxygen delivery system in free-ranging edible dormice (Glis glis). We sampled blood (n = 248) and urine (n = 319), performed an erythrocyte haemogram and visually determined the presence of haemoglobinuria...
July 29, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28737219/impacts-of-hydraulic-redistribution-on-grass-tree-competition-vs-facilitation-in-a-semi-arid-savanna
#6
Greg A Barron-Gafford, Enrique P Sanchez-Cañete, Rebecca L Minor, Sean M Hendryx, Esther Lee, Leland F Sutter, Newton Tran, Elizabeth Parra, Tony Colella, Patrick C Murphy, Erik P Hamerlynck, Praveen Kumar, Russell L Scott
A long-standing ambition in ecosystem science has been to understand the relationship between ecosystem community composition, structure and function. Differential water use and hydraulic redistribution have been proposed as one mechanism that might allow for the coexistence of overstory woody plants and understory grasses. Here, we investigated how patterns of hydraulic redistribution influence overstory and understory ecophysiological function and how patterns vary across timescales of an individual precipitation event to an entire growing season...
September 2017: New Phytologist
https://www.readbyqxmd.com/read/28729902/high-tolerance-to-high-light-conditions-for-the-protected-species-ariocarpus-kotschoubeyanus-cactaceae
#7
Erika Arroyo-Pérez, Joel Flores, Claudia González-Salvatierra, María L Matías-Palafox, Cecilia Jiménez-Sierra
We determined the seasonal ecophysiological performance under perennial plants and under high solar radiation for adult individuals from the 'living rock' cactus Ariocarpus kotschoubeyanus, which occurs equally under nurse plants and in open spaces. We evaluated the effective quantum yield of photosystem II (ΦPSII) and the dissipation of thermal energy [non-photochemical quenching (NPQ)] thorough the year. The maximum apparent electron transport rate (ETRmax) and the saturating photosynthetically active photon flux density for PSII (PFDsat) were also determined from rapid light curves...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28724227/carbon-and-nitrogen-allocation-strategy-in-posidonia-oceanica-is-altered-by-seawater-acidification
#8
Andrea Scartazza, Stefano Moscatello, Olga Gavrichkova, Maria Cristina Buia, Marco Lauteri, Alberto Battistelli, Maurizio Lorenti, Samantha Laird Garrard, Carlo Calfapietra, Enrico Brugnoli
Rising atmospheric CO2 causes ocean acidification that represents one of the major ecological threats for marine biota. We tested the hypothesis that long-term exposure to increased CO2 level and acidification in a natural CO2 vent system alters carbon (C) and nitrogen (N) metabolism in Posidonia oceanica L. (Delile), affecting its resilience, or capability to restore the physiological homeostasis, and the nutritional quality of organic matter available for grazers. Seawater acidification decreased the C to N ratio in P...
July 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28722113/specialised-stomatal-humidity-responses-underpin-ecological-diversity-in-c3-bromeliads
#9
Jamie Males, Howard Griffiths
The Neotropical Bromeliaceae display an extraordinary level of ecological variety, with species differing widely in habit, photosynthetic pathway, and growth form. Divergences in stomatal structure and function, hitherto understudied in treatments of bromeliad evolutionary physiology, could have been critical to the generation of variety in ecophysiological strategies among the bromeliads. Since humidity is a key factor in bromeliad niches, we focussed on stomatal responses to vapour pressure deficit (VPD)...
July 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28719623/moderate-irrigation-intervals-facilitate-establishment-of-two-desert-shrubs-in-the-taklimakan-desert-highway-shelterbelt-in-china
#10
Congjuan Li, Xiang Shi, Osama Abdalla Mohamad, Jie Gao, Xinwen Xu, Yijun Xie
BACKGROUND: Water influences various physiological and ecological processes of plants in different ecosystems, especially in desert ecosystems. The purpose of this study is to investigate the response of physiological and morphological acclimation of two shrubs Haloxylon ammodendron and Calligonum mongolicunl to variations in irrigation intervals. METHODOLOGY/PRINCIPAL FINDINGS: The irrigation frequency was set as 1-, 2-, 4-, 8- and 12-week intervals respectively from March to October during 2012-2014 to investigate the response of physiological and morphological acclimation of two desert shrubs Haloxylon ammodendron and Calligonum mongolicunl to variations in the irrigation system...
2017: PloS One
https://www.readbyqxmd.com/read/28718699/multiple-facets-of-laticifer-cells
#11
Lourdes Castelblanque, Begoña Balaguer, Cristina Martí, Juan José Rodríguez, Marianela Orozco, Pablo Vera
In the latex-bearing plants, the laticiferous system is the tubing structure that contains the latex and is constituted of living cells (laticifers). While laticifers are present only in a small percentage of the flowering plant species, they represent a type of specialized tissue within the plant where a myriad of metabolites are synthesized, some of them of considerable commercial importance. In this mini-review we synopsize the present knowledge about laticifer cells and discuss about their particular features as well as some evolutionary and ecophysiological cues and the potential exploitation of the knowledge generated around this peculiar type of plant cell...
July 18, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28708382/the-effects-of-temperature-and-hydrostatic-pressure-on-metal-toxicity-insights-into-toxicity-in-the-deep-sea
#12
Alastair Brown, Sven Thatje, Chris Hauton
Mineral prospecting in the deep sea is increasing, promoting concern regarding potential ecotoxicological impacts on deep-sea fauna. Technological difficulties in assessing toxicity in deep-sea species has promoted interest in developing shallow-water ecotoxicological proxy species. However, it is unclear how the low temperature and high hydrostatic pressure prevalent in the deep sea affect toxicity, and whether adaptation to deep-sea environmental conditions moderates any effects of these factors. To address these uncertainties we assessed the effects of temperature and hydrostatic pressure on lethal and sublethal (respiration rate, antioxidant enzyme activity) toxicity in acute (96 h) copper and cadmium exposures, using the shallow-water ecophysiological model organism Palaemon varians...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28707041/on-the-ratio-of-intercellular-to-ambient-co2-c-i-c-a-derived-from-ecosystem-flux
#13
Zheng-Hong Tan, Zhi-Xiang Wu, Alice C Hughes, Douglas Schaefer, Jiye Zeng, Guo-Yu Lan, Chuang Yang, Zhong-Liang Tao, Bang-Qian Chen, Yao-Hua Tian, Liang Song, Muhammad Tahir Jatoi, Jun-Fu Zhao, Lian-Yan Yang
The ratio of intercellular to ambient CO2 concentrations (c i/c a) plays a key role in ecophysiology, micrometeorology, and global climatic change. However, systematic investigation on c i/c a variation and its determinants are rare. Here, the c i/c a was derived from measuring ecosystem fluxes in an even-aged monoculture of rubber trees (Hevea brasiliensis). We tested whether c i/c a is constant across environmental gradients and if not, which dominant factors control c i/c a variations. Evidence indicates that c i/c a is not a constant...
July 13, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28706512/comparative-genomics-reveals-high-genomic-diversity-in-the-genus-photobacterium
#14
Henrique Machado, Lone Gram
Vibrionaceae is a large marine bacterial family, which can constitute up to 50% of the prokaryotic population in marine waters. Photobacterium is the second largest genus in the family and we used comparative genomics on 35 strains representing 16 of the 28 species described so far, to understand the genomic diversity present in the Photobacterium genus. Such understanding is important for ecophysiology studies of the genus. We used whole genome sequences to evaluate phylogenetic relationships using several analyses (16S rRNA, MLSA, fur, amino-acid usage, ANI), which allowed us to identify two misidentified strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28693560/ecophysiological-characterization-and-molecular-differentiation-of-culex-pipiens-forms-diptera-culicidae-in-tunisia
#15
Marwa Beji, Adel Rhim, David Roiz, Ali Bouattour
BACKGROUND: The Culex pipiens complex (Diptera: Culicidae) includes the most widespread mosquito species in the world. Members of this complex are the primary enzootic and epidemic vectors of the West Nile virus (genus Flavivirus) in several countries. The two recognized forms of Cx. pipiens (Linnaeus, 1758) - pipiens and molestus - exhibit behavioral and physiological differences. Natural populations of Cx. pipiens were investigated in several sites in Tunisia to evaluate the ecophysiological and molecular characteristics of their forms...
July 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28689724/thermal-biology-in-two-syntopic-lizards-phymaturus-extrilidus-and-liolaemus-parvus-in-the-puna-region-of-argentina
#16
Rodrigo Gómez Alés, Juan Carlos Acosta, Alejandro Laspiur
Body temperature is the most important ecophysiological variable affecting reptiles' life history. Moreover, thermoregulation in ectotherms implies a struggle to reach preferred temperatures in natural conditions due to the influence of biotic and abiotic factors. Our objective was to evaluate and compare the thermal biology of two syntopic species, Phymaturus extrilidus and Liolaemus parvus, in the Puna region of San Juan, Argentina. We determined body temperature (Tb), micro-environmental temperatures (Ta and Ts) and operative temperatures (Te) in the field...
August 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28689723/methods-and-pitfalls-of-measuring-thermal-preference-and-tolerance-in-lizards
#17
REVIEW
Agustín Camacho, Travis W Rusch
Understanding methodological and biological sources of bias during the measurement of thermal parameters is essential for the advancement of thermal biology. For more than a century, studies on lizards have deepened our understanding of thermal ecophysiology, employing multiple methods to measure thermal preferences and tolerances. We reviewed 129 articles concerned with measuring preferred body temperature (PBT), voluntary thermal tolerance, and critical temperatures of lizards to offer: a) an overview of the methods used to measure and report these parameters, b) a summary of the methodological and biological factors affecting thermal preference and tolerance, c) recommendations to avoid identified pitfalls, and d) directions for continued progress in our application and understanding of these thermal parameters...
August 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28687330/identification-of-peg-induced-water-stress-responsive-transcripts-using-co-expression-network-in-eucalyptus-grandis
#18
Modhumita Ghosh Dasgupta, Veeramuthu Dharanishanthi
Ecophysiological studies in Eucalyptus have shown that water is the principal factor limiting stem growth. Effect of water deficit conditions on physiological and biochemical parameters has been extensively reported in Eucalyptus. The present study was conducted to identify major polyethylene glycol induced water stress responsive transcripts in Eucalyptus grandis using gene co-expression network. A customized array representing 3359 water stress responsive genes was designed to document their expression in leaves of E...
July 4, 2017: Gene
https://www.readbyqxmd.com/read/28678804/skin-microbiota-in-frogs-from-the-brazilian-atlantic-forest-species-forest-type-and-potential-against-pathogens
#19
Ananda Brito de Assis, Cristine Chaves Barreto, Carlos Arturo Navas
The cutaneous microbiota of amphibians can be defined as a biological component of protection, since it can be composed of bacteria that produce antimicrobial compounds. Several factors influence skin microbial structure and it is possible that environmental variations are among one of these factors, perhaps through physical-chemical variations in the skin. This community, therefore, is likely modified in habitats in which some ecophysiological parameters are altered, as in fragmented forests. Our research goal was to compare the skin bacterial community of four anuran species of the Atlantic Forest of Brazil in landscapes from two different environments: continuous forest and fragmented forest...
2017: PloS One
https://www.readbyqxmd.com/read/28674548/photoprotective-strategies-of-mediterranean-plants-in-relation-to-morphological-traits-and-natural-environmental-pressure-a-meta-analytical-approach
#20
Beatriz Fernández-Marín, Antonio Hernández, Jose I Garcia-Plazaola, Raquel Esteban, Fátima Míguez, Unai Artetxe, Maria T Gómez-Sagasti
Despite being a small geographic extension, Mediterranean Basin is characterized by an exceptional plant biodiversity. Adaptive responses of this biocoenosis are delineated by an unusual temporal dissociation along the year between optimal temperature for growth and water availability. This fact generates the combination of two environmental stress factors: a period of summer drought, variable in length and intensity, and the occurrence of mild to cold winters. Both abiotic factors, trigger the generation of (photo)oxidative stress and plants orchestrate an arsenal of structural, physiological, biochemical, and molecular mechanisms to withstand such environmental injuries...
2017: Frontiers in Plant Science
keyword
keyword
86579
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"