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: ... ...

... 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...

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 ...

to better understand the abiotic factors underlying a natural plant productivity gradient. We related soil suggest that although richness is influenced directly by the filtering effects of the abiotic environment. However, such predictions are complicated by the fact that diversity, productivity, and the ...

... fire occurrence and area burned, and abiotic and human factors. Abiotic factors included Palmer Drought Severity Index, slope, aspect, and elevation, and human factors included county unemployment rates, d...

Sep 1, 2011 ... Title: Abiotic factors influencing deer browsing in West Virginia. Author: Campbell , Tyler A.; Laseter, Benjamin R.; Ford, W. Mark; Odom, Richard ...

al. 1998), and which addresses the major abiotic and biotic factors influencing this ecosystem. Our central hypothesis is that fire, ...

This activity is a water study investigation showing how biotic and abiotic factors are influenced by human activity.

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 ...

Response of tree seedlings to the abiotic heterogeneity generated by nurse shrubs: an experimental to the abiotic heterogeneity generated by nurse shrubs: an experimental approach at different scales. �/ Ecography 28: 757�/768. Spatial heterogeneity of abiotic factors influences patterns of ...

This study investigated the relative influence of biotic and abiotic factors on the growth of channel catfish Ictalurus punctatus in seven Mississippi floodplain rivers. The results indicate that growth was density-independent, being defined largely by abiotic conditions. PMID:20735562

The review is predicated upon the need for a detailed process-level understanding of factors influencing the reduction of anthropogenic organic chemicals in natural waters. In particular, abiotic reductions of anthropogenic organic chemicals are reviewed....

The review is predicated upon the need for a detailed process-level understanding of factors influencing the reduction of anthropogenic organic chemicals in natural waters. In particular, abiotic reductions of anthropogenic organic chemicals are reviewed. The most important reduc...

... increased and to discover what biotic and abiotic factors influence translocation success (Falk 1992; Jusaitis 2005). The impact ... ...

... will also ameliorate seedling emergence or resprouts through cracks in the ... with normal growth forms while overrested and decadent vegetation die due ... ...

... 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. ...

The biotic and abiotic factors that contribute to Microbiologically Influenced Corrosion (MIC) involve the transformation of chemical species at a metal surface. X-ray Photoelectron Spectroscopy (XPS) is utilized in conjunction with conventional microbiol...

Discuss how this activity relates to the ocean. What other abiotic factors in the ocean influence life? What would happen to the plants and animals that live within ...

... Title : THE SIGNIFICANCE OF ABIOTIC AND BIOTIC FACTORS OF THE ENVIRONMENT DURING THE ACCLIMATIZATION OF WATER ...

The circulation and mineralization of organic matter in natural ecosystems occurs as a result of biogenic processes; the significance of abiogenic factors is slight. Human economic activity creates the conditions wherein the circulation of elements and the mineralization of organic matter can occur abiogenically (as a result of acid rain and, in agroecosystems, under the ...

The growth and development of root systems of cotton plants is under genetic control but may be modified by the environment. There are many factors that influence root development in cotton. These range from abiotic factors such as soil temperature, soil water, and soil aeration to biotic ...

Any assessment of the long-term behavior of the transuranics in the terrestrial environment must be based on determination of the factors influencing solubility in soil. The influence of soil properties and abiotic and biotic processes on the long-term so...

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...

Inconsistent livestock distribution in extensive rangeland pastures continues as a vexing problem for land and livestock managers. Dispersal patterns of cattle are affected by abiotic factors like degree of slope, distance from water, shade, physical barriers, temperature extremes and precipitation...

... 1950-1999) to map fires in relation to pre-burn vegetation type and abiotic factors. Fire extent is greatest at intermediate elevations and locations of intermediate precipitation. Fire extent ... ...

Wind is a key abiotic factor that influences the dynamics of arid and semiarid systems. A series of experiments and models will be presented that show the important feedbacks that exist between Aeolian processes and biotic process in deserts. Wind impacts vegetation by both changing the composition ...

... of forest/seminatural areas, when compared with completely agricultural class 1, while ObsMax was significantly higher only in class 3 with respect to the same reference. Odds ratios (OR) obtained with Log...

... this ericaceous shrub species in the six clusters. Sphagnum fuscum, present in 45% of sampling points, is the ... established ombrotrophic species such as Chamaedaphne calyculata and Sphagnum fuscum are r...

... 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...

... in assigned ratings to the mound. The rating system has become an important tool in assessing red imported fire ant control strategies (Harlan et al. 1981, Lofgren and Williams ... ...

The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Concl...

Studies of bathyal settings in the Pacific and Indian Oceans indicate that macrobenthic communities are strongly influenced by abiotic factors including topography-induced flow, substrate mobility, bottom-water oxygen availability and organic-matter input...

... Christopher L. Main, and Thomas C. Mueller. (2009) Evaluation of Spring and Fall Burndown Application Timings on Control of Glyphosate-Resistant Horseweed (Conyza canadensis) in No-Till Cotton. Weed Techn...

... growth. In another field trial from 1986�1987, moon snails and other consumers were allowed access to ... In an experiment from June to September 1993, moon snails consumed >70% of juvenile clams (ca. 10 ...

A 3-D, time dependent model of the circulation in Pamlico Sound, NC, is used to relate the direction and magnitude of winds to the number of juvenile fish sampled at specified estuarine nursery locations. NC marine sport fishes are known to be spawned in ...

In addition, the importance of abiotic factors controlling decomposition in arid ... The importance of abiotic drivers and the position of senescent plant ...

Parasites with indirect life cycles require trophic transmission from intermediate hosts to definitive (vertebrate) hosts. Transmission may be facilitated if parasite infection alters the behavior of intermediate hosts such that they are more vulnerable to predation. Vulnerability to predation may also be influenced by abiotic factors; ...

-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, ...

... 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...

... 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 ...

Automated monitoring of animal locations at relatively short time intervals has allowed new insights into how biotic and abiotic factors influence spatial distribution patterns of livestock. We will discuss recently completed and on-going grazing behavior studies using GPS/GIS approaches at sites in...

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 ...

From "Abiotic vs. Biotic Influences on Habitat Selection of Coexisting Species: Climate Change Impacts?": "Species are commonly segregated along gradients ... ...

Contact the U.S. Geological Survey Search UMESC Publications Abiotic influences on the biomass of Vallisneria americana Michx. in the Upper Mississippi River Kreiling, R. M., Yin,...

Abiotic organic reactions, such as hydrolysis, elimination, substitution, redox, and polymerization reactions, can be influenced by surfaces of clay and primary minerals, and of metal oxides. This influence is due to adsorption of the reactants to surface...

) 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 ...

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 environment. As the number ...

... 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 ... ...

The macrobenthic community in shallow soft-bottom areas in the Bay of Anc�n, Peru, is characterized by low biodiversity due to low oxygen concentrations. During El Ni�o (EN) events, higher water temperature and higher concentrations of dissolved oxygen induce a temporary increase in biodiversity. However, the structure and dynamics of the emerging macrobenthic community and populations, ...

The distribution and abundance of organisms is influenced by historical, abiotic, and biotic factors. The goal of my dissertation was to determine the distribution of anurans in the Big Bend region of the Chihuahuan Desert and to examine how abiotic and biotic factors shape the composition and ...