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Topic: Biomass (ecology)

    Note: these results are not from the primary (high quality) database.

California Plant Ecology Native plants of the valley grassland, coastal prairie and most other California plant communities survive because the ecosystem is a protective, closed biomass system (all the biomass in the system is conserved and recycled) based on plant community, mycorrhizal community, climate and soil types. California native ecosystems and the way they work (cooperation) are very different from the way the plants in a common garden grow (competition). California does not have highly fertile soils in any plant community (other than Riparian) unless the community is destroyed or burned because the community structure limits the nutrition of the site. www.laspilitas.com /advanced/advecology.htm   (2835 words)

Ecology Mathematics is crucial for Ecology, for example for the calculus, statistics, projections and extrapolations when Ecologists deal with specific information about the number and distribution of species, the evaluation of biomass, population growth, extension of communities and biodiversity, and to quantify the environmental pressures at a given biome. Ecology is the branch of  biological sciences dealing with the interactions between organisms and their environment (chemical and physical factors). Ecology makes use of Physics because all biotic processes has to do with the transference of energy, as from producers, which take advantage of light energy for producing complex organic compounds, to bacteria, which obtain chemical energy by the disintegration of the molecular structures of other organisms. www.biocab.org /Ecology_1.html   (2748 words)

Ecosystem Ecology In agricultural ecosystems, a large amount of nutrients are removed from the area in the crop biomass. Ecosystem: all organisms living in a community all abiotic factors with which they interact. Combustion of fossil fuels is the main cause of acid precipitation The burning of fossil fuels releases sulfur oxides and nitrogen that react with water in the atmosphere to produce sulfuric and nitric acids. www3.baylor.edu /~Mark_Taylor/1306Ecosystemecology.htm   (1256 words)

Science: Deep-Sea Ecology Based on meetings and discussions, this ad hoc working group produced a Deep-Sea Ecology white paper regarding the research possibilities offered by NEPTUNE. Yet such an approach is unlikely to resolve such unanswered questions on deep-sea communities as: What are the dynamics of deep-sea community structure in terms of species composition, abundance, biomass and diversity? Only a small percentage of the vast biota of the deep sea has been observed and sampled; it is estimated that there are up to 10 million undescribed species of organisms in the abyssal ocean. www.neptune.washington.edu /pub/science/sc_deep_sea.html   (640 words)

Projects The goal of theoretical ecology is not to duplicate nature on a computer screen but to put together our current understanding on ecological processes and to draw generalizations from the predictions of the models. Development of microbial biomass and activity has also been studied together with vegetation along gradients of primary succession. Theoretical conciderations form the basis of all the abovementioned reseach projects and explicit modelling is involved in many of them. cc.oulu.fi /~mth/group/projects.html   (245 words)

Fire Ecology Eco-Link Fires and ecosystems have interacted throughout time, establishing fire as an influence in ecosystem functions such as, recycling of nutrients, regulating plant succession and wildlife habitat, maintaining biological diversity, reducing biomass, plus controlling insect and disease populations. In his book Fire Ecology of the Pacific Northwest, James K. Agee, Professor of Forest Ecology at the University of Washington, says that "this idea has been challenged by a new understanding of the importance and inevitability of forces such as storms and fires that keep ecosystems in a state of constant change. As fire is carried into the crowns of the trees it is transported much further up slopes than was previously possible when fires were largely confined to the understory, further compounding the problem. www.forestinfo.org /Products/eco-links/fire-ecology.htm   (4007 words)

Into the Blogosphere: Rhetoric, Community, and Culture of Weblogs: Geography of the Blogosphere: Representing the Culture, Ecology and Community of Weblogs The study of ecology, either as a science unto itself or as a subdiscipline of biology, is concerned with the interrelationship of living organisms (as expressions of genetic replicators, individuals, species or the totality of biomass) and environment (climatic and geological) (Bates, 2001; Dawkins, 1982). This contextual mediation of identity in the blogosphere is analogous to online multiplayer simulated environments and presents comparable challenges faced by such environments in the construction of civil society though tends to be less beholden to single corporate owners of virtual geographies such as the Sims Alphaville or the online metropolis that is Everquest. Ecologies of the blogosphere are in this way inextricably interpolated into practices of space and place in offline environments. blog.lib.umn.edu /blogosphere/geography_of_the_blogosphere.html   (4007 words)

COAS Polar Faculty Special Interests: Marine Benthic Ecology; invertebrate community ecology, deep-sea ecology, polar ecology, pollution ecology. Special Interests: Aquatic microbial ecology; roles of microbes in ecosystem processes; carbon-energy flux through pelagic food webs; biology and ecology of phagotrophic protists; methods development. Present Research: Benthic ecology of Mendocino Ridge, ecology of Beaufort Sea benthos, ecology of Northeast Pacific abyssal plains, environmental quality of the Stage Harbor system (Cape Cod, Massachusetts). www.esr.org /Polar/faculty.html   (4007 words)

EReFs, Online Guide to Estuarine Research Ecology of zooplankton, benthos, and fishes in the Columbia River estuary. Nutrient and plankton ecology of the Columbia River estuary. Primary production, plant and detrital biomass, and particle transport in the Columbia Rive estuary. www.erf.org /education/Erefs_columbia.htm   (4007 words)

Nalini Nadkarni - Curriculum Vitae Community and ecosystem ecology of tropical and temperate forest canopies; the effects of forest fragmentation on biodiversity and community function; the development of database tools for canopy researchers; dissemination of research results to non-scientific audiences; partnering of scientists and artists to enhance conservation of forests. The ecology of Mt. Kaindi: Montane forest ecology of Papua New Guinea. Microbial biomass and activity in canopy organic matter and the forest floor of a tropical cloud forest. academic.evergreen.edu /n/nadkarnn/cv/cv.html   (4674 words)

Profiles of microorganisms: the microbial world They seem to be remarkably common around the world, and the abundance of their DNA in coastal surface waters suggests that they can represent about 34% of the prokaryote biomass at certain times of the year. The growth conditions for the archaea are thought to resemble those that existed in the early stages of the earth's history. It is difficult to say when life first evolved or arrived here, but microbial life has been present for at least 3,500 million years, and the earth itself was only formed about 4,600 million years ago, after which its surface would need to have cooled to physiological temperatures. helios.bto.ed.ac.uk /bto/microbes   (3020 words)

Charcoal ecology Africa The results of the study show that the best situation in Africa would be to transition from biomass fuels to petroleum-based fossil fuels such as kerosene and liquid propane gas, which can prevent between 1.3 and 3.7 million premature deaths, depending on the speed of transition. "Most charcoal is produced in Africa by one or two guys going out in the woods, almost always without a permit and on somebody else's land, cutting down a tree or two, chopping it up, lighting it, covering it with dirt, and then hovering around it for 2-4 days while it becomes charcoal," Kammen said. In 2000, nearly 470 million tons of wood were consumed in homes in sub-Saharan Africa in the form of firewood and charcoal, more wood per capita than any other region in the world. www.theallineed.com /science/05041602.htm   (789 words)

CZECHOPHILIA   ON   THE   NET, Page 6 Vita - Civic Association to Promote Better Understanding of Ecology Association of Historians of Czech Republic - Opava Czech Society for Genealogy and Heraldry in Prague www.svu2000.org /links/k10list6.htm   (374 words)

Czech Republic The University Stockholm in Czech Republic,, Czech, tjeckoslovakia,, export, skiing, touristinformation, shopping, shops, export, import, trade, trading, tourism, information, Brno, is the home of the Fish Ecology mailing list, which also maintains an archive of messages and a good collection of other documents and software related to fisheries. Czech Republic The Department of Fisheries and Marine Biology at the University of Czech Republic, Czech Republic,, Czech, tjeckoslovakia,, export, skiing, touristinformation, shopping, shops, export, import, trade, trading, tourism, information, Brno,. This is an EU sponsored project between the aquaculture-related departments of the universities of Ghent (Belgium), Wageningen (Netherlands) and Czech Republic (Czech Republic,, Czech, tjeckoslovakia,, export, skiing, touristinformation, shopping, shops, export, import, trade, trading, tourism, information, Brno,). www.praha1.i-p.com /b72.htm   (8406 words)

Mark J. Brush - Biological Sciences My research focuses on the oceanography, ecology, and biogeochemistry of coastal marine ecosystems including estuaries, lagoons, and sounds, and spans a range of scales from large estuaries like Chesapeake Bay and Narragansett Bay, to sub-estuaries like the York River, to very shallow systems like the Lynnhaven River, VA and RI coastal ponds. Biomass layering and metabolism in mats of the macroalga Ulva lactuca L. Estuaries 26(4A):916-926 My field program is focused on the systems ecology, metabolism, and C and N cycling of coastal ecosystems. www.vims.edu /bio/faculty/brush_mj.html   (1036 words)

Gulf Ecology Division With the development of quantitative methods for estimating the biomass, metabolic activity, nutritional status and community structure of the estuarine detrital microbiota, and the indication of marked effects on the microbiota by amphipod grazing, a detailed examination of the effects of grazing by two sympatric amphipods was conducted. The microbiota, which develop on Teflon squares after a 2-wk exposure in a North Florida estuary, showed, when grazed for 2 wk, significantly increased bacterial biomass (short-branched and cis-vaccenic fatty acids) and microeukaryotes (total polyenoic fatty acids). Melita feed on nonphotosynthetic microeukaryotes (lowered triglyceride glycerol) leaving a larger total biomass (extractable lipid phosphate), photosynthetic biomass (lipid galactose) with greater total metabolic activity estimated as the 4-h rate of phospholipid and sulfolipid synthesis. www.epa.gov /ged/publica/c1536.htm   (405 words)

ProdDiv.txt “Species richness and biomass: dissection of the hump-shaped relationships.” Ecology 79(7): 2555-2559. Brown, J. “Species diversity of seed-eating desert rodents in sand dune habitats.” Ecology 54: 775-87. “Diversity, floristic richness, and species evenness during a secondary (post-fire) succession.” Ecology 54: 897-902. knb.ecoinformatics.org /biodiversity/ProdDiv.txt   (3480 words)

BES - Grant Reports - SEPG 1891 This build-up in microbial biomass was due to an increase in the abundance of fatty acids synthesised by bacteria and fungi (18:2w6). Despite not observing a progressive increase in the relative abundance of fungi within the microbial community toward the maximal plant biomass stage, we did detect a significant drop in fungal abundance during retrogressive succession. This project was concerned with looking for general patterns that occur during primary succession, and specifically changes that occur in the decomposer community as plant communities go through the "build-up" to the maximal biomass phase, and finally to the decline phase. draft.britishecologicalsociety.org /articles/grants/reports/1891   (3480 words)

Center for Biomarker Analysis White, D. Chemical ecology: Possible linkage between macro-and microbial ecology. On-line monitoring of biofilm biomass and activity on antifouling and fouling-release surface using bioluminescence and fluorescence measurements during laminar-flow. Microbial biomass and community structure differences in phase-separated methanogenic reactors determined by lipid analysis. cba.bio.utk.edu /cbastaff.html   (2627 words)

IGB: Biology and Ecology of Fishes: Personnel Changes in structure and function of fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation) PhD thesis within the project 'changes in structure and function of fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation)'. Changes in structure and function of a fish community in a mesotrophic lake after enhancement of piscivorous fish biomass (food web manipulation) www.igb-berlin.de /abt4/mitarbeiter/torsten.schulze/index_e.shtml   (1244 words)

Ecology: Consumer species richness and autotrophic biomass.@ HighBeam Research Ecology: Consumer species richness and autotrophic biomass.@ HighBeam Research We tested whether standing autotrophic (unicellular algal) biomass is sensitive to variation in initial consumer (nondecomposer, heterotrophic protistan) diversity in experimental microbial microcosms. Our results showed a strong, negative relationship between autotrophic biomass and consumer species richness. highbeam.com /library/doc0.asp?docid=1G1:53643864&refid=ink_tptd_mag   (187 words)

Marine Ecology Progress Series: MEPS 133:263-273 However, the change in Trichodesmium biomass alone does not account for the change observed in autotrophic carbon assimilation and elemental biomass composition. Colonies were composed, on average, of 182 filaments accounting for 12% of total (free filament plus colonies) Trichodesmium biomass. We also estimate that Trichodesmium dinitrogen fixation accounted for, on average, at least 27% of the new production at this study site. www.int-res.com /abstracts/meps/v133/p263-273.html   (187 words)

Ecology and Society: Visualizing the food-web effects of fishing for tunas in the Pacific Ocean Trade-offs between fishing and predation mortality rates that occur when multiple fisheries interact with their respective food webs may lead to smaller changes in biomass than if only the effect of a single fishery is considered. Our simulations also suggested that the largest changes in the biomass of any billfish or shark group in response to any fishing strategy were only slightly greater than a doubling of biomass and, more typically, less than an 80% increase. The catches and mortality rates for all species and the fishing effort of all fisheries not affected by the management action were maintained at their average 1990s levels. sunsite.wits.ac.za /eco/vol9/iss1/art10/main.html   (187 words)

Alternative Technology - Web Guide - People in Action Excellent and informative website, including several DOE programs (solar, wind, etc.), news, and an energy information portal: energy efficiency, renewable energy (biomass, geothermal, hydrogen, hydropower, ocean, solar, wind), information for consumers (on saving energy and using renewable energy), kids and states, and topics on education and financial opportunities. Ecology: Alternative Technology, Country Living, Nature Conservation, Sustainable Development... English - Ecology, Renewable Energy, United States, United States: Alternative Technology, United States: Ecology - At citizen.org peopleinaction.info /alternativetechnology   (937 words)

Ecology Guided Independent Learning Environment Ecology Online EcologyOnline.net Robberecht Ecology courses online An important conceptual advance in growth modeling was the theory estimating biomass maintenance and conversion efficiencies from tissue analysis (Penning de Vries et al. Eckhardt, F.E. Le principe de la soufflerie climatisee applique a l'etude des echanges gazeux de la courverture vegetale. Penning de Vries, F.W. The cost of maintenance processes in plant cells. www.cnr.uidaho.edu /plantecophysiology/mooney1987.htm   (937 words)

Gulf Ecology Division For fountain darters, no significant effects on growth occurred at concentrations less than LOECs for survival and biomass, and IC10 values indicated that reductions in growth (both dry weight and total length) only occurred at concentrations greater than those affecting survival. Lowest average ChVs for the four species tested ranged from 7.7 µg/L for the fountain darter (for reduced survival and biomass) to 15.9 µg/L for the spotfin chub (for reduced growth and biomass). The average ChV for growth of fathead minnows from three tests (7.8 µg/L) was nearly equal to that for fountain darters, although this value was strongly influenced by the low ChV of 2.8 µg/L determined from one of the three tests. www.epa.gov /ged/publica/c1213.htm   (635 words)

University of North Carolina at Chapel Hill - Announcements Patrick Osborne (Stirling University), Stephen Walsh (University of North Carolina), and Andrew Millington and Jane Wellens (University of Leicester), "Spatial analysis in biogeography and ecology: current themes and opportunities" He was previously the Head of Ecology at the National Avian Research Center in Abu Dhabi where he directed research on conservation issues and compiled the book The Desert Ecology of Abu Dhabi (1996). He has edited two books, Environmental Change in Drylands, with Ken Pye, Wiley (1994) and Vegetation Mapping, with Roy Alexander (1999) and has written two books on biomass assessment in sub-Saharan Africa published by Earthscan (1989) and The World Bank (1995). www.unc.edu /depts/geog/lcsal/aag_special.html   (1515 words)

Ecology and Society: Visualizing the food-web effects of fishing for tunas in the Pacific Ocean Trade-offs between fishing and predation mortality rates that occur when multiple fisheries interact with their respective food webs may lead to smaller changes in biomass than if only the effect of a single fishery is considered. In both systems, it was shown that biomass reductions in the upper trophic level were accompanied by increases in the biomass of the lower trophic levels, a finding that is similar to the growing evidence from other fished ecosystems (e.g., Lilly et al. Attempts to recover top predators by reducing fishing mortality via longline gear modifications and by stricter regulations on shark finning may be as effective as simple reductions in longline fishing effort. sunsite.wits.ac.za /eco/vol9/iss1/art10/main.html   (6661 words)

Carrion Beetles in Yellowstone NP: Introduction Because so little is known of terrestrial ecosystem carrion ecology, discussions of the importance of carrion reduction, carrion biomass and carrion communities to terrestrial ecosystem functioning can only be based on inference. Unlike terrestrial carrion ecology research, which is primarily anecdotal, their findings were discussed within the perspective of the entire benthic ecosystem, speculating what influences such whale carcasses might have had on the evolution, distributions, and abundances of deep-sea species. Another large vertebrate, carrion ecology investigation conducted in the Nearctic region was a short-term observational study of the arthropods associated with harbor seal carcasses located within the intertidal zone along the north eastern coast of the United States (Lord and Berger 1984). virgin.msu.montana.edu /Ynpmsweb/ynpmsin.htm   (5429 words)

Biomass of Sediment Bacteria by Sedimentation Field-Flow Fractionation Scholar, CRC for Fresh Water Ecology, Water Studies Ctr., Dept. of Chem., Monash Univ., Clayton, Victoria, Australia 3168), Reshmi Sharma, (Res. Fellow, CRC for Fresh Water Ecology, Water Studies Ctr., Dept. of Chem., Monash Univ., Clayton, Victoria, Australia), and Ronald Beckett, (Reader, CRC for Fresh Water Ecology, Water Studies Ctr., Dept. of Chem., Monash Univ., Clayton, Victoria, Australia) www.pubs.asce.org /WWWdisplay.cgi?0100027   (339 words)

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