... of the roles played by abiotic, biotic, and human factors in determining the spatial patterns of their origins ... related to a combination of abiotic, biotic, and human factors: no single factor or facto...
NBII National Biological Information Infrastructure
... ABSTRACT Questions: What are the relative roles of abiotic and grazing management factors on plant community distribution ... by environmental factors hierarchically, changing first according to abiotic f...
... of principle sources of environmental exposure and exposure routes; evaluation of abiotic and ecosystem-wide effects; determination of factors ...
DTIC Science & Technology
Sep 1, 2011 ... Three abiotic factors at stand scale, four abiotic factors at plot scale, and two biotic factors and one abiotic factor at subplot scale was used to ...
Treesearch
interactions. Each symbol denotes a different abiotic factor. Spatial position Spatial position Environmental), and importance of abiotic factor dependence on the species (Kawai and Tokeshi 2007). The sign and strength what is being tested even for a single abiotic ...
E-print Network
... Title : THE SIGNIFICANCE OF ABIOTIC AND BIOTIC FACTORS OF THE ENVIRONMENT DURING THE ACCLIMATIZATION OF WATER ...
not be the case. Abiotic resources as well as other biotic factors, such as competitors and preda- tors, are also-based conceptuali- zation will not suffice to identify the requisite biotic and abiotic factors that need biotic or abiotic thresholds. Habitat Restoration 386 Restoration Ecology ...
Sep 1, 2011 ... Each biotic and abiotic wetland component should be identified and its contribution to ... Understanding the major external and internal factors that regulate the ... Adequate consideration of wetland ecology, hydrology, ...
... rates from passive trapping as an index of activity level and sought to identify the environmental variables most ... cover variables demonstrated a significant correlation with observed activity levels. ...
From the site: "Students will identify the abiotic factors that influence a river or stream and the organisms that live in it. Abiotic factors include: ... ...
... 1991); Physiology of Plants Under Stress: Abiotic Factors (Nilsen and Orcutt, 1996); Physicochemical and Environmental Plant Physiology ( ... Under Stress: Soil and Biotic Factors (Orcutt and Nilsen, 2000)...
Expected changes in environmental factors will alter productivity of agroecosystems and influence the distribution of agricultural pests. In addition to the natural factors that cause stress, humans introduce chemical pesticides into the agricultural environment. Weeds persist in...
EPA Science Inventory
This learning activity from the Advanced Technology Environmental and Energy Center (ATEEC) will help students studying the concepts of biotic/abiotic factors and biodiversity. The activity should take about five class periods to complete, and requires a few additional materials which are detailed in the lesson. Users must download ...
NSDL National Science Digital Library
Fenthion (Baytex), an organophosphate insecticide, is frequently applied to salt-marsh environments to control mosquitoes. Shake-flask tests were used to study rates of abiotic and biotic degradation of fenthion and the environmental parameters that affec...
National Technical Information Service (NTIS)
Fenthion (Baytex), an organophosphate insecticide, is frequently applied to salt-marsh environments to control mosquitoes. hake-flask tests were used to study rates of abiotic and biotic degradation of fenthion and the environmental parameters that affect these rates. Water or wa...
In addition, the importance of abiotic factors controlling decomposition in arid ... The importance of abiotic drivers and the position of senescent plant ...
NASA Website
A workshop on Microbial Activities at Yucca Mountain was held with the intention to compile information on all pertinent aspects of microbial activity for application to a potential repository at Yucca Mountain. The findings of this workshop set off a num...
... rat (Dipodomys californicus), deer mice (Peromyscus maniculatus), and western gray squirrels (Sciurus griseus) (Lane and Brown 1991; Brown and ... Mun, R. J. Eisen, and L. Eisen. 2005. Western gray squirr...
Four factors regarding the physical state of each site were considered ... of an ESA does indicate the value of both biotic and abiotic resources within a site. .... LAND SURFACE > LANDSCAPE > LANDSCAPE ECOLOGY � Parameter Definition ...
During the second year of study investigative efforts were concentrated on above-ground vegetation, microbial systems, small mammals, and Lake Powell, and includes monitoring of relevant biotic and abiotic factors, the subjection of laboratory systems to ...
Optimizing crop management must consider the dynamic interaction of abiotic and biotic factors within the context of economic, environmental, sociological, and policy constraints. A wide array of information technologies exists to assist producers, consultants, scientists, agribusiness, action agenc...
Technology Transfer Automated Retrieval System (TEKTRAN)
The transmission success of free-living larval stages of endohelminths is generally modulated by a variety of abiotic and biotic environmental factors. Whereas the role of abiotic factors (including anthropogenic pollutants) has been in focus in numerous studies and summarized in reviews, the ...
PubMed
-history traits and abiotic versus biotic factors in limiting species distributions. Keywords Abiotic factors-standing paradigm balances abiotic and biotic factors in delimiting species distributions: one view emphasizes.70% (Fig. 2c). Other factors, ...
... Both abiotic and biotic factors control the presence and ... The most important abiotic factor is the availability ... However, the effect of site-variation in soil ...
This article suggests and discusses two novel aspects for the formulation of standards for environmental toxicants. First, uniform national standards for each pollutant will be underprotective for some ecosystems and overprotective for others, inasmuch as the toxicity of a pollutant to the indigenous biota is dependent on the physicochemical properties of the recipient ...
PubMed Central
Plant growth and crop production can be greatly affected by common environmental stresses such as drought, high salinity and low temperatures. Gene expression is affected by several abiotic stresses. Stress-inducible genes are regulated by transcription factors and epigenetic mechanisms such as histone modifications. In this ...
by population density Usually abiotic events e.g. Killing frost kills the same proportion of the population and other abiotic factors vary so randomly that no population experiences favorable growth conditions involved Nonequilibrium Theories of Population Regulation Abiotic Extrinsic Regulation Several ...
) the distributions of widespread invasive species, (ii) the biotic and abiotic factors that may determine humile) (10), to examine the relative roles of abiotic, biotic, and human-mediated factors in determining of abiotic, biotic, and human-mediated factors in explaining ...
of surrounding landscape; abiotic physical/chemical factors): Comments: Landscape Context: structure, condition and extent of surrounding landscape; abiotic physical/chemical factors. An integrated measure of the quality of biotic and abiotic factors, structures, and ...
... thereto. Page 3. 1 JPRS: 19,752 19 Juna 196363- 77 412093 THE SIGNIFICANCE OF ABIOTIC AND BIOTIC FACTORS OF ...
Effects of biotic (shrimp) and abiotic (discharge) factors on the depositional environment were quantified in a montane stream in Puerto Rico. Electricity was used experimentally to exclude ... ...
Fungal symbionts have been found associated with every plant studied in natural ecosystem, where they colonize and reside entirely in the internal tissues of their host plant or partially. Fungal endophytes can express/form a range of different lifestyle/relationships with different host including symbiotic, mutualistic, commensalistic and parasitic in response to host genotype and ...
Fungal symbionts have been found to be associated with every plant studied in the natural ecosystem, where they colonize and reside entirely or partially in the internal tissues of their host plant. Fungal endophytes can express/form a range of different lifestyle/relationships with different host including symbiotic, mutualistic, commensalistic and parasitic in response to host genotype and ...
to evaluate the influence of abiotic (water temperature and stability, nutrients) and biotic (bacteria that abiotic factors, as well as crustacean abundances, were structured along a gradient in the great lake by small-scale variations and lake gradients in abiotic and biotic factors, with a ...
Sensing environmental changes and initiating a gene expression response are important for plants as sessile autotrophs. The ability of epigenetic status to alter rapidly and reversibly could be a key component to the flexibility of plant responses to the environment. The involvement of epigenetic mechanisms in the response to environmental cues and to ...
Osmotic stresses such as drought, salinity, and cold are major environmental factors that limit agricultural productivity. Transcription factors play essential roles in abiotic stress signaling in plants. Three TaMYB2 members were identified and designated TaMYB2A, TaMYB2B, and TaMYB2D based on their genomic ...
This Science Object is the second of four Science Objects in the Coral Reef Ecosystems SciPack. It investigates the abiotic characteristics that affect the coral reef ecosystem. The number and kinds of organisms found along each reef depend on the physical conditions of the environment and resources available, including food, light, water quality, temperature, and other ...
Abiotic stresses such as drought, high salinity, and cold are common adverse environmental conditions that significantly influence plant growth and productivity worldwide. The phytohormone abscisic acid (ABA) plays an important role in physiological and developmental responses as well as in co-ordinating various stress signal transduction pathways in ...
� Polyploidy has occurred throughout plant evolution and can result in considerable changes to gene expression when it takes place and over evolutionary time. Little is known about the effects of abiotic stress conditions on duplicate gene expression patterns in polyploid plants. � We examined the expression patterns of 60 duplicated genes in leaves, roots and cotyledons ...
