Bibliographies thématiques / Abiotic and biotic

Littérature scientifique sur le sujet « Abiotic and biotic »

Auteur : Grafiati
Publié le 18 mai 2024

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Articles de revues sur le sujet "Abiotic and biotic"

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NINGSIH, SRI WAHYU, Achyani Achyani et Handoko Santoso. « FAKTOR BIOTIK DAN ABIOTIK YANG MENDUKUNG KERAGAMAN TUMBUHAN PAKU(Pteridophyta) DI KAWASAN HUTAN GISTING PERMAI KABUPATEN TANGGAMUS LAMPUNG ». BIOLOVA 2, no 1 (26 février 2021) : 64–71. http://dx.doi.org/10.24127/biolova.v2i1.293.

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ABSTRACT: Tumbuh suburnya Pteridophyta di Kawasan Hutan Gisting Permai Kecamatan Gisting Kabupaten Tanggamus sangat dipengaruhi oleh faktor biotik dan abiotik. Faktor biotik meliputi semua kehidupan makhluk hidup di bumi baik individu, populasi dan komunitas yang di dalamnya termasuk jumlah inang Pteridophyta yang banyak, sedangkan faktor abiotik meliputi seluruh faktor-faktor non hidup dari suatu kondisi lingkungan seperti cahaya matahari, suhu, air, dan tanah, ketinggian. Faktor-faktor abiotik ini tidak hanya menyediakan energi dan materi penting, tetapi juga mempunyai peranan dalam menentukan tumbuhan-tumbuhan dan hewan-hewan yang mampu berada disuatu tempat tertentu sesuai dengan habitatnya. Metode yang digunakan dalam kajian ini adalah berupa kajian kualitatif. Artikel ini dikaji dengan menyatukn referensi dari berbagai sumber diantaranya berasal dari jurnal, buku, arsip dokumen pekon Gisting Permai, dan internet. Pengumpulan data diperoleh dengan menggunakan berbagai referensi yang dikumpulkan sebanyak mungkin yang berkaitan dengn faktor biotik dan abiotik pertumbuhan tumbuhan paku. Kata kunci: Biotik, Abiotik, Pteridophyta. ABSTRACT: The growth of Pteridophyta in the Permai Gisting Forest Area, Gisting Sub-District Tanggamus Regency was strongly influenced by biotic and abiotic factors. Biotic factors include all the life of living things on earth both individuals, populations and communities which include a large number of Pteridophyta hosts, while abiotic factors include all non-living factors of an environmental condition such as sunlight, temperature, water, and soil, height. These abiotic factors not only provide important energy and material, but also had a role in determining plants and animals that which are able to be in a certain place according to their habitat. The method used in this study is a qualitative study. This article was reviewed by citing references from various sources including journals, books, Gisting Permai archive documents, and the internet. The data collection was obtained by using as many references as possible related to biotic and abiotic factors for fern growth. Key word: biotic, abiotic, Pteridophyta.
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Aryanti, Nirmala Ayu, Febri Arif Cahyo Wibowo, Mahidi Mahidi, Frita Kusuma Wardhani et I. Komang Tri Wijaya Kusuma. « Hubungan Faktor Biotik dan Abiotik Terhadap Keanekaragaman Makrobentos di Hutan Mangrove Kabupaten Lombok Barat ». Jurnal Kelautan Tropis 24, no 2 (19 mai 2021) : 185–94. http://dx.doi.org/10.14710/jkt.v24i2.10044.

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High human activity around the coastal area will affect the mangrove ecosystem and the biota such as macrobenthos. Benthic diversity can reflect conditions of mangrove ecosystem, that slow growth and sensitive to environmental changes. This study aims to determine the influence of biotic and abiotic environments on the macrobenthos in Cendi Manik Village, Sekotong District, West Lombok Regency, West Nusa Tenggara. Data collection of macrobenthos, biotic and abiotic environments in natural and rehabilitation mangrove, then the diversity species of macrobenthos with biotic and abiotic environmental variables were analyzed multiple regression. The most dominant vegetations are Rhizophora mucronata Lam and Avicennia marina Forssk. The diversity index for macrobenthos is low (H’ 1,207) in natural and rehabilitation mangrove. Macrobenthos between two location have high similarity with 84,6%. The result of multiple regression test showed that most influencing of macrobenthos were mud thickness and brightness. Aktivitas manusia yang tinggi sekitar kawasan pesisir akan mempengaruhi ekosistem mangrove dan biota di dalamnya seperti makrobentos. Keanekaragaman bentos dapat mampu mencerminkan kondisi ekosistem mangrove, pertumbuhan yang lambat dan sensitif terhadap perubahan lingkungan. Penelitian ini bertujuan untuk mengetahui hubungan lingkungan biotik dan abiotik terhadap makrobentos yang ada di Desa Cendi Manik Kecamatan Sekotong Kabupaten Lombok Barat Nusa Tenggara Barat. Pengumpulan data makrobentos, biotik dan abiotik lingkungan pada hutan mangrove alam dan rehabilitasi, kemudian keanekaragaman jenis makrobentos dengan variabel lingkungan biotik dan abiotik dianalisis regresi berganda. Jenis vegetasi yang paling mendominasi adalah jenis Rhizophora mucronata Lam dan Avicennia marina Forssk. Keanekaragaman jenis makrobentos termasuk dalam kategori rendah (H’ 1,207) di hutan mangrove alam dan rehabilitasi. Jenis makrobentos antara dua lokasi tersebut memiliki kemiripan yang tinggi yaitu 84,6 %. Uji regresi berganda diperoleh variabel lingkungan yang paling berpengaruh pada keanekaragaman jenis makrobentos adalah ketebalan lumpur dan kedalaman kecerahan air.
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Ali, Fajri Nurul, Ari B. Rondonuwu, Silvester B. Pratasik, Adnan S. Wantasen, Nego E. Bataragoa et Janny D. Kusen. « Composition and Condition Of Coral Reefs In Dudepo Cape, South Bolaang Mongondow Regency, North Sulawesi ». Jurnal Ilmiah PLATAX 10, no 1 (15 avril 2022) : 179. http://dx.doi.org/10.35800/jip.v10i1.38203.

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This study aims to determine the composition and condition of coral reefs in Dudepo Cape, South Bolaang Mongondow Regency. The method used is Line Intercept Transect (LIT). Data were collected by SCUBA diving at 3 meters and 10 meters depths. In 3 meters depth was found biotic components such as Acropora and non-Acropora with 6 growth forms, and five other biotic components, while abiotic components were only found in coral rubbles (R). In 10 meter depth was found biotic components live coral with 7 growth forms, and five other biotic components, while the abiotic components as sand and coral rubbles. In two depths, the coral reef component dominant were Acropora digitate (ACD) and Acropora branching (ACB). The condition of coral reefs at 3-meter depth and 10 meters were “Fair” with the percent cover of live corals being 35.59% and 37.30%.Keywords: Coral; Coral Reef; ConditionAbstrakPenelitian ini bertujuan untuk mengetahui komposisi dan kondisi terumbu karang di Tanjung Dudepo Kabupaten Bolaang Mongondow Selatan. Metode yang digunakan dalam penelitian ini yaitu Line Intercept Transect (LIT). Pengambilan data dilakukan dengan penyelaman SCUBA pada kedalaman 3 meter dan 10 meter. Pada kedalaman 3 meter ditemukan komponen biotik berupa karang hidup acropora dan non-acropora dengan 6 bentuk pertumbuhan, dan 5 komponen biotik lainnya, sedangkan komponen abiotik hanya ditemukan berupa pecahan karang. Pada kedalaman 10 meter ditemukan komponen biotik berupa karang hidup dengan 7 bentuk pertumbuhan, dan 5 komponen biotik lainnya, sedangkan komponen abiotik berupa pasir dan pecahan karang. Pada dua kedalaman, bentuk pertumbuhan yang mendominasi yaitu acropora digitate dan acropora branching. Kondisi terumbu karang pada lokasi penelitian khususnya pada kedalaman 3 meter dan 10 meter yaitu berada pada kategori cukup dengan persentase tutupan sebesar 35,59% dan 37,30%. Kata kunci: Karang; Terumbu Karang; Kondisi.
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Suzuki, Nobuhiro, Rosa M. Rivero, Vladimir Shulaev, Eduardo Blumwald et Ron Mittler. « Abiotic and biotic stress combinations ». New Phytologist 203, no 1 (11 avril 2014) : 32–43. http://dx.doi.org/10.1111/nph.12797.

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Sugisaki, Ryuichi, et Koichi Mimura. « Mantle hydrocarbons : Abiotic or biotic ? » Geochimica et Cosmochimica Acta 58, no 11 (juin 1994) : 2527–42. http://dx.doi.org/10.1016/0016-7037(94)90029-9.

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Manghwar, Hakim, et Wajid Zaman. « Plant Biotic and Abiotic Stresses ». Life 14, no 3 (12 mars 2024) : 372. http://dx.doi.org/10.3390/life14030372.

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In the complex field of plant science, knowledge of the many difficulties that plants encounter from both living and non-living stresses is essential for maintaining biodiversity and managing natural resources in a sustainable manner, in addition to guaranteeing global food security [...]
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Biniaz, Yaser, Aminallah Tahmasebi, Alireza Afsharifar, Ahmad Tahmasebi et Péter Poczai. « Meta-Analysis of Common and Differential Transcriptomic Responses to Biotic and Abiotic Stresses in Arabidopsis thaliana ». Plants 11, no 4 (12 février 2022) : 502. http://dx.doi.org/10.3390/plants11040502.

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Environmental stresses adversely affect crop growth and yield, resulting in major losses to plants. These stresses occur simultaneously in nature, and we therefore conducted a meta-analysis in this study to identify differential and shared genes, pathways, and transcriptomic mechanisms involved in Arabidopsis response to biotic and abiotic stresses. The results showed a total of 436/21 significant up-/downregulated differentially expressed genes (DEGs) in response to biotic stresses, while 476 and 71 significant DEGs were respectively up- and downregulated in response to abiotic stresses in Arabidopsis thaliana. In addition, 21 DEGs (2.09%) were commonly regulated in response to biotic and abiotic stresses. Except for WRKY45 and ATXTH22, which were respectively up-/down- and down-/upregulated in response to biotic and abiotic stresses, other common DEGs were upregulated in response to all biotic and abiotic treatments. Moreover, the transcription factors (TFs) bHLH, MYB, and WRKY were the common TFs in response to biotic and abiotic stresses. In addition, ath-miR414 and ath-miR5658 were identified to be commonly expressed in response to both biotic and abiotic stresses. The identified common genes and pathways during biotic and abiotic stresses may provide potential candidate targets for the development of stress resistance breeding programs and for the genetic manipulation of crop plants.
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Schwarz, Christian, Joost Brinkkemper et Gerben Ruessink. « Feedbacks between Biotic and Abiotic Processes Governing the Development of Foredune Blowouts : A Review ». Journal of Marine Science and Engineering 7, no 1 (28 décembre 2018) : 2. http://dx.doi.org/10.3390/jmse7010002.

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This paper reviews the initiation, development, and closure of foredune blowouts with focus on biotic-abiotic interactions. There is a rich body of literature describing field measurements and model simulations in and around foredune blowouts. Despite this abundance of data there is no conceptual framework available linking biotic and abiotic observations to pathways of blowout development (e.g., erosional blowout growth or vegetation induced blowout closure). This review identifies morphological and ecological processes facilitating the transition between blowout development stages and sets them in the context of existing conceptual frameworks describing biotic-abiotic systems. By doing so we are able to develop a new conceptual model linking blowout development to the dominance of its governing processes. More specifically we link blowout initiation to the dominance of abiotic (physical) processes, blowout development to the dominance of biotic-abiotic (bio-geomorphological) processes and blowout closure to the dominance of biotic (ecological) processes. Subsequently we identify further steps to test the proposed conceptual model against existing observations and show possibilities to include it in numerical models able to predict blowout development for various abiotic and biotic conditions.
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Antonyak, H. L., N. E. Panas, O. I. Pershyn, A. I. Polishchuk et N. K. Hoyvanovych. « Iodine in abiotic and biotic environments ». Studia Biologica 12, no 2 (2018) : 117–34. http://dx.doi.org/10.30970/sbi.1202.567.

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McNab, W. Henry, et Tara L. Keyser. « A vegetative index of stand productivity based on tree inventory for predicting oak site index in the Central Hardwood Region ». Canadian Journal of Forest Research 50, no 8 (août 2020) : 760–73. http://dx.doi.org/10.1139/cjfr-2019-0412.

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Models for prediction of site index (SI) typically include only abiotic causal variables (e.g., soil) and lack biotic response variables (e.g., vegetation), which could exhibit greater sensitivity to important environmental factors affecting tree height growth. Our study objective was to evaluate Whittaker’s moisture condition index (MCI) (R.H. Whittaker. 1956. Ecol. Monogr. 26: 1–80) as a potential biotic variable for inclusion with conventional abiotic variables in oak (Quercus L.) SI prediction models. The MCI is the sum of relative abundances of inventoried plot tree species weighted by their moisture affinity classification. We compared regression parameters of conventional base models including only abiotic variables with exploratory models configured with abiotic variables and MCI for explaining variation of SI. The best abiotic model included only aspect. When MCI was included in the abiotic model, aspect became insignificant, resulting in a single-variable biotic model that accounted for increased SI variation. The MCI biotic model remained significant when tested with independent data from a distant location. The MCI is easily calculated using plot inventory data, and with further evaluation, it may be confirmed as a useful biotic variable in combination with abiotic soil and topographic variables for prediction of oak SI.
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Thèses sur le sujet "Abiotic and biotic"

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RICCI, SARA. « Study of biotic and abiotic stresses in Solanaceae by metabolic and proteomic approaches ». Doctoral thesis, Università di Foggia, 2017. http://hdl.handle.net/11369/363315.

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Escalante, Pérez María. « Poplar responses to biotic and abiotic stress ». kostenfrei, 2009. http://nbn-resolving.de/urn/resolver.pl?urn=nbn:de:bvb:20-opus-46893.

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Karim, Sazzad. « Exploring plant tolerance to biotic and abiotic stresses / ». Uppsala : Dept. of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200758.pdf.

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Matheson, Leah J. « Abiotic and biotic reductive dehalogenation of halogenated methanes / ». Full text open access at:, 1994. http://content.ohsu.edu/u?/etd,241.

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Jain, Ritu Shree. « Rice response to simultaneous biotic and abiotic stresses ». Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/6415/.

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With the predicted climate change and an ever-growing population there is increasing pressure to develop crop plants with improved stress responses, increased yield and high nutritive value. We have explored transcriptomic changes in the leaves and roots of rice plants (Oryza sativa japonica cv Nipponbare) in response to drought and the root-knot nematode Meloidogyne graminicola. A glasshouse model was developed to mimic conditions experienced by rice plants in the field. The plant responses under simultaneous biotic and abiotic stress were dominated by the drought element accompanied by a unique set of genes that were only responsive to the simultaneous stress. Highlighted within this group were novel members of stress-responsive gene families for example cytochrome P450, wall-associated kinases, lipid transfer proteinlike proteins and new candidate genes that may play important roles in the response of rice to multiple stresses. The genes that were differentially regulated between the multiple and the drought stress treatment were explored using loss-of-function mutants. The loss-of-function mutant for peroxidase precursor gene (per) showed improved growth and yield compared to the wildtype Nipponbare plants. The experiments conducted in growth rooms were validated in a field study. Both Nipponbare rice plants, and the popular lowland indica rice cv IR64 were grown under prolonged vegetative drought stress accompanied by cyst nematode or root-knot nematode infection. Reduction of phytate, an anti-nutrient, has been adopted as a major strategy to improve the nutritional value of crop plants. Nematode susceptibility of low phytate Arabidopsis plants was studied to determine the effect of reduced phytate content on the plant’s defence response. The study has provided insight into the genome-wide transcriptional changes in rice under a combined biotic and abiotic stress. It has led to better understanding of the stress responses in plants that will be advantageous in developing crop varieties with improved yield and nutritive value.
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VENULEO, MARIANNA. « Algal responses to abiotic and biotic environmental changes ». Doctoral thesis, Università Politecnica delle Marche, 2017. http://hdl.handle.net/11566/245503.

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L’eterogeneità delle risposte fisiologiche delle microalghe ai cambiamenti ambientali rappresenta uno dei fattori più importanti nel determinare le interazioni tra le specie in ambiente. La mia ricerca ha rivelato che specie differenti sono diversamente inclini a modificare la propria composizione cellulare in risposta ai cambiamenti ambientali. La scelta tra acclimatazione e omeostasi dipende anche dal tipo e dalla durata della perturbazione in esame. La maggior parte delle alghe considerate nel mio studio, per esempio, ha mostrato una risposta omeostatica ai cambiamenti nelle concentrazioni ambientali di CO2 e nella forma di azoto disponibile. Non è stato ritrovato nessun legame tra la strategia di risposta e la tassonomia delle alghe. Particolare attenzione è stata rivolta a Chromera velia, parente prossima dei parassiti Apicomplexa e probabile simbionte di coralli dell’ordine Scleractinia. C. velia si è dimostrata perfettamente in grado di vivere ad alta CO2. Questa condizione ha stimolato la produzione di C organico da parte di C. velia, incrementato la sua efficienza di utilizzo dei nutrienti e ha determinato cambiamenti nei rapporti stechiometrici tra gli elementi. Si può ipotizzare, dunque, che l’elevata concentrazione di CO2 rinvenuta all’interno dei tessuti del corallo che circondano il simbionte possa facilitare la vita di quest’alga in simbiosi. Infine, ho potuto dimostrare che le interazioni tra alghe e ambiente possono avere conseguenze nei rapporti tra alghe e loro predatori. I miei esperimenti hanno mostrato che i copepodi (ma non i rotiferi) possono discriminare tra alghe che sono identiche in ogni aspetto tranne che nella composizione cellulare. La storia nutrizionale delle alghe, dunque, essendo uno dei principali determinanti della loro composizione cellulare, risulta un elemento di grande importanza nelle relazioni tra alghe e predatori.
Algae exhibit a large variety of physiological responses to the environmental changes. Such heterogeneity of responses, which is a major determinant of species interaction in natural algal assemblages, was the target of my research. My results show that different species are differently prone to change their cell composition in response to environmental changes, depending on the type and duration of the perturbation. When algae are exposed to changes in the N source and in the CO2 availability, for instance, homeostasis appears as a much more common strategy than usually believed. No link between the response modes and the taxonomy of the examined species was found. I paid special attention to Chromera velia, a photosynthetic relative of apicomplexan parasites that is likely involved in symbiotic associations with scleractinian corals. This alga seems perfectly capable of copying with very high CO2. Life at high CO2 stimulates the overall organic C production of C. velia, increases its nutrient use efficiency and changes the stoichiometric relationships among elements within the cell. The high CO2 concentrations that has been reported in the animal tissue surrounding the photosynthetic cells may therefore facilitate C. velia life in symbiosis. Finally, I have demonstrated that the interactions between algae and environment can affect the relationships between algae and their grazers. My experiments show that the copepods are able to discriminate among algae identical in all aspects but in cell composition, while the rotifers are not. Therefore, the nutritional history of algae, which has the potential to affect algal cell composition, appears as a major determinant of the relationships between algae and grazers.
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Madeo, M. « MEDICINAL PLANT RESPONSE TO ABIOTIC AND BIOTIC STRESS ». Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/150114.

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Medicinal plants have always been considered a rich source of secondary metabolites that promote human health. Quality and property of medicinal plants strictly depend on secondary metabolites profile. They also play important roles in plant physiological processes and in ecological systems. The environment exerts a selective pressure on plants and these molecules actively participate to the plant response and adaptation. Amongst secondary metabolite, the phenolic compounds possess properties able to prevent oxidative stress. Therefore, an enhancement of the amount of phenolic compounds can be observed under different environmental factors. With this project we aimed to study the phenolic compounds of the medicinal plant Achillea collina Becker ex Rchb. cv “SPAK”, and their implication in physiological and biochemical response to abiotic and biotic stresses. We seek the possibility to increase the synthesis of phenolics with health properties or useful as potential control agents of insect pests. Abiotic stress. Hydroponic culture was used to evaluate the effect of long-term mineral, nitrogen starvation (abiotic stress) in A. collina. By means of HPLC-DAD-ESI/MS and NMR techniques, the content and the qualitative profile of A. collina methanol soluble phenolics, were evaluated. We concluded that the methanol extracts of A. collina leaves and roots are rich in hydroxycinnamic acids such as chlorogenic acid (2.33 ± 0.3 mg g-1 Dw), 3,5-di-O-caffeoylquinic acid (10.7 ± 4.2 mg g-1 Dw) and 4,5-di-O-caffeoylquinic acid (0.88 ± 0.24 mg g-1 Dw). The content of hydroxycinnamic acids significantly increased in plants growth under mineral nitrogen starvation, respect to the control plants. Chlorogenic acid increased by 2.5 and 3-fold and 3,5-di-O-caffeoylquinic acid increased by 8.5 and 35-fold in leaves and root, respectively. Biotic stress. A. collina plants cultivated in soil were infested with the phloem feeders aphids. We set up the system (e.g., age of plant, type of the cage, number of insects per plant, duration of infestation) to co-cultivated the plants with specialist (Macrosiphoniella millefolii) and generalist (Myzus persicae Sulzer) aphids. Plant growth, water and total protein content were evaluated. Based on a preliminary assessment of phenolic fingerprint, further extractions and separations were performed on A. collina leaves, to obtained soluble and cell wall-bound fractions and their sub-classes. Our results showed that A. collina plants were strongly affected by aphid infestation. Twenty days after infestation, the fresh weight was twenty-fold and seven-fold increased, in control and infested plants. Water and protein content, condensed tannins and methanol soluble phenolics content, were not affected by the aphid infestation. Cell wall-bound phenolics content increased in infested plants. The main phenolics were found to be chlorogenic acid and 3,5-di-O-caffeoylquinic in methanol soluble fraction, and caffeic acid in cell wall fraction. The chromatographic profiles showed that the main hydroxycinnamic acids were present in control and in both M. persicae and M. millefolli infested plants. The quantitative analysis indicated that the levels of chlorogenic acid and 3,5-di-O-caffeoylquinic acid, were 44% and 37% higher in M. persicae infested plants, respectively. The levels of chlorogenic acid and 3,5-di-O-caffeoylquinic acid, were 27% and 39% higher in M. millefolli infested plants, respectively. Twenty days after infestation the content of caffeic acid was resulted 43% and 34% higher in M. persicae and M. millefolli infested plants, respectively. These differences should indicate the different evolutionary interaction between plant and generalist/specialist aphid. We hypotheses that the increase of these molecules may represent a plant resistance mechanism against aphid attack. Finally, a chemometric approach, by means multivariate statistical analysis, was applied on chromatogram profiles to verify whether there is difference between methanol soluble fraction of infested and non infested A. collina plants. The discriminant analysis showed a significant effect of phloem feeders aphids on soluble phenolic compounds and indicated two peaks, not yet identified, that separate control from infested plants. In conclusion the model system developed to cultivate A. collina was useful to understand the metabolic basis of the environment interactions. The main hydroxycinnamic acids identified, were resulted increased in both abiotic and biotic stress, suggesting their implication in A. collina protection to environmental controversies.
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MacDonald, Arthur Andrew Meahan. « Abiotic and biotic factors creating variation among bromeliad communities ». Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58954.

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Many ecological communities show variation from place to place; understanding the causes of this variation is the goal of community ecology. Differences in community composition will be the result of both stochastic and deterministic processes. However, it is difficult to know to what degree deterministic processes will shape community composition. In this thesis I combined observational and experimental approaches to quantify deterministic processes within a particular ecological community -- they phytotelmata of bromeliad plants. In my thesis I describe three studies at different scales of organization: 1) do organisms of different size respond equally to changes in their environment 2) how do predators interact to influence prey survival 3) what mechanisms underly the response of similar species to the same environmental gradient, bromeliad size. In Chapter 1, I tested an hypothesis developed from previous observational data -- that smaller organisms respond less than larger ones to the same environmental gradient -- different bromeliad species that occur under different forest canopies. After removing variation caused by dispersal, I found that environmental variation explained little variation for bacteria, more for zooplankton and most of all for macroinvertebrates. In my second chapter, I examined ecological determinism on a smaller scale -- within a single trophic level (macroinvertebrate predators). I found that predators may interfere with each other, reducing predation rates and increasing prey survival. In Chapter 3, I examine macroinvertebrate responses to bromeliad volume. I use both null models and a field experiment to show that for at least one such pair, a difference in abiotic tolerances may be the plausible mechanism. Together these results illustrate when, and to what degree, bromeliad communities respond to deterministic factors. All three chapters first demonstrate a pattern, testing it against a suitable null distribution, before attempting to quantify possible mechanisms with a field experiment. This combination of observation and experiment is an approach which can contribute to our understanding of how ecological systems work.
Science, Faculty of
Graduate
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Black, Kyrsten E. « Root longevity as affected by biotic and abiotic factors ». Thesis, University of Aberdeen, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361797.

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Roots and their associated mycorrhizal fungi have long been recognised as major determinants of nutrient cycling. Their measurement has been limited because soil limits accessibility. The use of in-situ camera techniques in conjunction with minirhizotrons and image analysis software now make the acquisition of accurate root longevity data possible. The current literature was reviewed in relation to root longevity - both measurement techniques and available data. Four main experiments were employed to study the root longevity of a number of tree species, grass and clover subject to differing environmental conditions and grass and clover and poplar roots with and without colonisation by Arbuscular Mycorrhizal fungi. The data was analysed in a number of different ways including the use of the powerful statistical technique for censored data - survival analysis. This technique proved to be very useful for analysing temporal changes to root longevity. The data indicate that root longevity can be extremely short but is dependent upon environment and for some species, colonisation by Arbuscular Mycorrhizal fungi. Preliminary calculations were completed to determine the role of root death in nutrient cycling and these predict that large quantities of nitrogen, phosphorus and carbon are flowing from the live to the dead root pool on an annual basis.
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Gerald, Gary Wayne II. « Consequences of abiotic and biotic factors on limbless locomotion ». Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218208497.

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Livres sur le sujet "Abiotic and biotic"

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Brannon, James M. Abiotic and biotic TNT transformations. Vicksburg, Miss : U.S. Army Engineer Waterways Experiment Station, 1997.

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Sinha, Bhav Kumar, et Reena. Abiotic & ; Biotic Stress Management in Plants. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003281986.

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Sinha, Bhav Kumar, Reena et Surendra Prasad. Abiotic and Biotic Stress Management in Plants. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003286134.

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Vats, Sharad, dir. Biotic and Abiotic Stress Tolerance in Plants. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-9029-5.

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Tóth, Gábor. Geomorphological environments : Research methods on biotic and abiotic environments. Stuttgart : Gebrüder Borntraeger, 2012.

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Mohamed, Heba I., Hossam El-Din Saad El-Beltagi et Kamel A. Abd-Elsalam, dir. Plant Growth-Promoting Microbes for Sustainable Biotic and Abiotic Stress Management. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66587-6.

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Al-Khayri, Jameel M., Shri Mohan Jain et Dennis V. Johnson, dir. Advances in Plant Breeding Strategies : Agronomic, Abiotic and Biotic Stress Traits. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22518-0.

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FRaser, Brian Gordon. Boundary flux of the hyporheic zone as determined by biotic and abiotic indicators. Ottawa : National Library of Canada, 1995.

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M, Huang P., dir. Soil abiotic and biotic interactions and impact on the ecosystem and human welfare. Enfield, (NH) : Science Publishers, 2004.

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Gribko, Linda S. Biotic and abiotic mechanisms in the establishment of northern red oak seedlings : A review. Newtown Square, PA : USDA Forest Service, Northeastern Research Station, 2002.

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Chapitres de livres sur le sujet "Abiotic and biotic"

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Tresco, Patrick A., et Greg A. Gerhardt. « The Biotic-Abiotic Interface ». Dans Brain-Computer Interfaces, 31–45. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8705-9_3.

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De Angelis, Hernan Horacio. « Abiotic and Biotic Resources ». Dans Archaeology of the Hunter-Gatherers of the Central Mountains of Tierra del Fuego, 1–13. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81022-1_1.

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Stambaugh, Tamra, Eric Fecht et Emily Mofield. « Biotic and Abiotic Cubes ». Dans Interactions in Ecology and Literature, 46–51. New York : Routledge, 2021. http://dx.doi.org/10.4324/9781003235828-11.

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Marchetti, Michael P., Theo Light, Joaquin Feliciano, Trip Armstrong, Zeb Hogan, Joshua Viers et Peter B. Moyle. « Homogenization of California’s Fish Fauna Through Abiotic Change ». Dans Biotic Homogenization, 259–78. Boston, MA : Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1261-5_13.

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Robert-Seilaniantz, Alexandre, Rajendra Bari et Jonathan D. G. Jones. « A Biotic or Abiotic Stress ? » Dans Abiotic Stress Adaptation in Plants, 103–22. Dordrecht : Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3112-9_6.

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Kuppusamy, Pandiyan, Samadhan Yuvraj Bagul, Sudipta Das et Hillol Chakdar. « Microbe-Mediated Abiotic Stress Alleviation : Molecular and Biochemical Basis ». Dans Plant Biotic Interactions, 263–81. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26657-8_16.

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Hill, J., H. C. Becker et P. M. A. Tigerstedt. « Breeding for biotic and abiotic stress ». Dans Quantitative and Ecological Aspects of Plant Breeding, 212–34. Dordrecht : Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5830-5_8.

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Garg, Neera, Kiran Saroy, Amandeep Cheema et Aditi Bisht. « Microbial Diversity in Soil : Biological Tools for Abiotic Stress Management in Plants ». Dans Plant Biotic Interactions, 283–321. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26657-8_17.

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Singh, Jitender, et Jitendra K. Thakur. « Photosynthesis and Abiotic Stress in Plants ». Dans Biotic and Abiotic Stress Tolerance in Plants, 27–46. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-9029-5_2.

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Gupta, Madhuri, Pankaj Kumar, Jitender Singh, Shivani Khanna et Mini Sharma. « Abiotic Stress Management in Pulse Crops ». Dans Abiotic & ; Biotic Stress Management in Plants, 229–59. London : CRC Press, 2022. http://dx.doi.org/10.1201/9781003281986-9.

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Actes de conférences sur le sujet "Abiotic and biotic"

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Choi, H. J., et C. D. Montemagno. « Hybrid biotic/abiotic nanofactory ». Dans Smart Structures and Materials, sous la direction de Daniele Inaudi, Wolfgang Ecke, Brian Culshaw, Kara J. Peters et Eric Udd. SPIE, 2006. http://dx.doi.org/10.1117/12.657741.

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Kolb, Vera M., et P. J. Liesch. « Abiotic, biotic, and in-between ». Dans Optical Engineering + Applications, sous la direction de Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov et Paul C. Davies. SPIE, 2008. http://dx.doi.org/10.1117/12.792668.

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Konesky, Gregory. « Apparent biotic micromorphologies of abiotic origin ». Dans Optical Engineering + Applications, sous la direction de Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov et Paul C. W. Davies. SPIE, 2007. http://dx.doi.org/10.1117/12.732240.

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Lanzani, Guglielmo. « Photonic interfaces for abiotic/biotic coupling ». Dans Organic and Hybrid Sensors and Bioelectronics XVI, sous la direction de Ioannis Kymissis, Emil J. List-Kratochvil et Sahika Inal. SPIE, 2023. http://dx.doi.org/10.1117/12.2684403.

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Engel, Michael H., Vlad E. Andrus et Stephen A. Macko. « Amino acids in carbonaceous meteorites : biotic or abiotic ? » Dans Optical Science and Technology, SPIE's 48th Annual Meeting, sous la direction de Richard B. Hoover et Alexei Y. Rozanov. SPIE, 2004. http://dx.doi.org/10.1117/12.504222.

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Montemagno, Carlo. « Engineering and Fabricating a Hybrid Biotic/Abiotic Biological Computer ». Dans 2006 IEEE International Symposium on MicroNanoMechanical and Human Science. IEEE, 2006. http://dx.doi.org/10.1109/mhs.2006.320312.

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Cavazos, Amanda, et Jennifer Glass. « Potential Biotic-Abiotic Nitrous Oxide Production in Oceanic Oxyclines ». Dans Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.341.

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Klenner, Fabian, Frank Postberg, Jon Hillier, Nozair Khawaja, Marie Dannenmann, Morgan L. Cable et Bernd Abel. « Discriminating Abiotic and Biotic Chemistry on Active Ocean Worlds ». Dans Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1334.

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Montemagno, C. D. « Engineering and Fabricating a Hybrid Biotic/Abiotic Biological Computer ». Dans 2006 Sixth IEEE Conference on Nanotechnology. IEEE, 2006. http://dx.doi.org/10.1109/nano.2006.247590.

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Parsaev, Evgeniy, Nadezhda Filippova, Tat'yana Kobernickaya et Viktor Ostrovskiy. « New variety of Karlybas volzhski melilot for fodder production in northern Kazakhstan ». Dans Multifunctional adaptive fodder production23 (71). ru : Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-23-71-73-77.

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Rapports d'organisations sur le sujet "Abiotic and biotic"

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Frost, J. W. Biotic and abiotic carbon to sulfur bond cleavage. Office of Scientific and Technical Information (OSTI), janvier 1991. http://dx.doi.org/10.2172/5474561.

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Frost, J. W. Biotic and abiotic carbon to sulfur bond cleavage. Office of Scientific and Technical Information (OSTI), janvier 1991. http://dx.doi.org/10.2172/5215659.

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Tsukruk, Vladimir V. Nanostructured Interfaces for Organized Mesoscopic Biotic-Abiotic Materials. Fort Belvoir, VA : Defense Technical Information Center, septembre 2011. http://dx.doi.org/10.21236/ada563947.

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El-Naggar, Mohamed Y. Biotic-Abiotic Nanoscale Interactions in Biological Fuel Cells. Fort Belvoir, VA : Defense Technical Information Center, mars 2014. http://dx.doi.org/10.21236/ada602346.

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Frost, J. W. Biotic and abiotic carbon to sulfur bond cleavage. Final report. Office of Scientific and Technical Information (OSTI), mai 1994. http://dx.doi.org/10.2172/10150691.

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Szecsody, James E., Jim P. McKinley, Andrew T. Breshears, Brooks J. Devary, Fiona Crocker, Herbert L. Fredrickson et Karen Thompson. Abiotic and Biotic Mechanisms Controlling In Situ Remediation of NDMA. Fort Belvoir, VA : Defense Technical Information Center, mai 2009. http://dx.doi.org/10.21236/ada606789.

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Dunphy, Darren Robert, C. Jeffrey Brinker, Carlee E. Ashley, Helen Kennicott Baca, DeAnna M. Lopez et Eric C. Carnes. Discovery, integration, and interrogation of biotic/abiotic materials and systems. Office of Scientific and Technical Information (OSTI), octobre 2009. http://dx.doi.org/10.2172/1028941.

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Roso, Kevin M. Mechanisms and Dynamics of Abiotic and Biotic Interactions at Environmental Interfaces. Office of Scientific and Technical Information (OSTI), juin 2006. http://dx.doi.org/10.2172/895931.

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Pound. L52104 Differentiation of Corrosion Mechanisms by Morphological Feature Characterization. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), août 2004. http://dx.doi.org/10.55274/r0011097.

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Résumé :
Corrosion of liquid and gas pipelines can occur by various mechanisms. The ability to differentiate between mechanisms is crucial if corrosion control measures are to be effective. The objective of this work was to determine whether corrosion of pipeline steels results in characteristic morphological features that are diagnostic for specific corrosion mechanisms, particularly with regard to microbiologically influenced corrosion (MIC). Coupons of 1018 carbon steel were exposed for two weeks in 5 wt% NaCl under abiotic and biotic conditions in different environments (N2, N2-CO2, and N2-H2S). Pitting occurred in all environments both with and without bacteria present. Many of the pits formed under biotic conditions were similar in morphology to those formed under abiotic conditions. However, other pits exhibited a different morphology from the abiotic pits in the N2 and N2-CO2 environments. In the N2-H2S environment, the presence of bacteria did not result in any discernible differences in pit morphology. The biotic pits in the N2 and N2-CO2 environments were similar in shape and size to those previously found on pipeline steel in a biotic culture medium, where MIC was essentially the sole cause of pitting. Thus, identification of pits associated with MIC appears feasible for natural gas environments.
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Gribko, Linda S., Thomas M. Schuler et W. Mark Ford. Biotic and abiotic mechanisms in the establishment of northern red oak seedlings : a review. Newtown Square, PA : U.S. Department of Agriculture, Forest Service, Northeastern Research Station, 2002. http://dx.doi.org/10.2737/ne-gtr-295.

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