Movement of dioxins through the food web has resulted in bioconcentration and biomagnification.

** Ecosystems: biodiversity — biome — habitat — plankton — thermocline — carbon cycle — water cycle — nitrogen cycle — food web — trophic level — saprobe — decomposition

DDT and its breakdown products are transported from warmer regions of the world to the Arctic by the phenomenon of global distillation, where they then accumulate in the region's food web.

Elton's ' food cycle ' was replaced by ' food web ' in a subsequent ecological text.

The larger interlocking pattern of food chains in an ecological community creates a complex food web.

Generalized food web of waterbirds from Chesapeake Bay

Complete empirical measurements are generally restricted to a specific habitat, such as a cave or a pond, and principles gleaned from food web microcosm studies are extrapolated to larger systems.

Feeding relations require extensive investigations into the gut contents of organisms, which can be difficult to decipher, or stable isotopes can be used to trace the flow of nutrient diets and energy through a food web.

This increases food web stability.

The frog represents a node in an extended food web.

The fish community of this lake has remained stable over a long period until a number of introduced species | introductions in the 1970s restructured its food web.

Algae are the basis of the open water food web, and the source of primary production that ends up as Lake Trout and Walleye at the top of the open water food web.

Lake Ontario food web

This food web has been damaged not only by over-fishing, and changes in nutrient levels, but also by other types of polluted from industrial chemicals, agricultural fertilizers, untreated sewage, phosphates, such as from laundry detergents, and chemicals.

Insects play a critical role as pollinators, decomposers, and as a part of the food web.

< center > Fishing down the food web </ center >

Frogs are a keystone group in the food web dynamics of many of the world's ecosystems.

Measurements of ratios of one naturally occurring stable isotope to another play an important role in radiometric dating and isotope geochemistry, and also helpful for determining patterns of rainfall and movements of elements through living organisms, helping sort out food web dynamics in ecosystems.

They are generally herbivorous, entangling planktonic food through a mucous web that can be up to 5 cm wide, many times larger than themselves.

There is little doubt if they had a secret ballot, they would vote for food for their family, in place of ideological purity out on the farm.

and, though he repeated, over and over again, the spectacular figures of industrial and agricultural production in 1980, the `` ordinary '' people in Russia are still a little uncertain as to how `` communism '' is really going to work in practice, especially in respect of food.

At that time consideration will be given to whether in the light of the United States supplies of rice available for Title 1, disposal, India's production, consumption and stocks of food grains, other imports from the United States and countries friendly to the United States, India's storage capacity, and other related factors, any increase would be possible in the portion of the total rice programmed which is currently planned for procurement during the first year.

Because agricultural activities are seasonal and the areas of production and harvest of many foods are widely scattered geographically, and because of the high cost of transporting bulk food items any substantial distance to a central processing location, the use of large central processing stations, where low-cost radiation facilities approaching the megawatt range might be utilized, is inherently impracticable.

For them, providing appetizing food under battle or emergency conditions is a paramount consideration.

The present status of food preservation by ionizing radiation is discussed by food classes in the following paragraphs.

`` The food is wonderful and it is a lot of fun to be here ''!!

Because the food is selected with thought for its nutritional value, care for its origin, and prepared in a manner that retains the most nutrients, the food does taste good.

The school finds that the children are satisfied with smaller amounts of food since all of it is high in quality.

The soybean seed is the most important leguminous food in the world.

In western Europe and North America, where the level of economic development is higher, grains and other seed products furnish less than one-third of the food consumed.

The rest is used for human food and industrial products.

The demand for food is so great in the world that little arable land can be given over to growing the nonfood crops.

The Louisiana city is known, of course, for its fine food, good music and its colorful hospitality `` and, when guests arrive at Philmont that night '', says Mrs. Grinsfelder, `` that is exactly what we expect to offer them.

As for food, Mrs. Henry Louchheim, chairman of this phase, is a globetrotter who knows good food.

Stickney is a salesman for Plee-Zing, Inc., 2544 Green Bay Rd., Evanston, a food brokerage and grocery chain firm, of which his father, William L. Jr., is president.

So you can see that Gerald G. Ramsey, director of SMU's food services, is not the ordinary type of craven, women-trodden chef.

To state fully what the Bible means as my daily spiritual food is as intimate and difficult as to formulate the reasons for loving my nearest and dearest relatives and friends.

The Bible is as obviously and truly food for the spirit as bread is food for the body.

In modern ecological theory, bioturbation is recognised as an archetypal example of ' ecosystem engineering ', modifying geochemical gradients, redistributing food resources, viruses, bacteria, resting stages and eggs.

Commonly-cited examples of dog-whistle politics include civil rights-era use of the phrase " forced busing ," used to enable a person to imply opposition to racial integration without them needing to say so explicitly ; the state of Georgia's adoption, in 1956, of a flag visually similar to the Confederate battle flag, itself understood by many to be a dog-whistle for racism ; the phrase " Southern strategy ," used by the Republican Party in the 1960s to describe plans to gain influence in the South by appealing to people's racism ; Ronald Reagan, on the campaign trail in 1980, saying in Mississippi " I believe in states ' rights " ( a sentence the New Statesman later described as " perhaps the archetypal dog-whistle statement "), described as implying Reagan believed that states should be allowed, if they want, to retain racial segregation ; Reagan's use of the term " welfare queens ," said to be designed to rouse racial resentment among white working-class voters against minorities ; a 2008 TV ad for Republican presidential candidate John McCain called " The One ," which observers said dog-whistled to evangelical Christians who believed Obama might be the Antichrist ; a Tea Party spokeswoman saying President Obama " doesn't love America like we do ," thought to be an allusion to Obama's race and to the birth certificate controversy, and Republicans frequently emphasizing Obama's middle name for the same reason ; an aide to 2012 Republican presidential nominee Mitt Romney saying Romney would be a better President than Obama because Romney understood the " shared Anglo-Saxon heritage " of the United States and the United Kingdom ; former Republican presidential candidate Newt Gingrich and 2012 Republican vice presidential nominee Paul Ryan, and others, calling Obama " the food stamps president " said to be a way of exploiting stereotypes among racially resentful white voters who see food stamps as unearned giveaways to minorities.

There were no other tetrapods on the land and the amphibians were at the top of the food chain, occupying the ecological position currently held by the crocodile.

Elton defined ecological relations using concepts of food chains, food cycles, and food size, and described numerical relations among different functional groups and their relative abundance.

Critics have objected to GMOs on several grounds, including tampering with nature, ecological concerns, economic concerns raised by the fact these organisms are often subject to intellectual property law, whether food produced from GMOs should be banned or labelled, whether such food is safe, and whether GM crops are useful to address the world's food needs.

Opponents of food irradiation sometimes state that large-scale irradiation would increase processing, transportation, and handling times for fruits and vegetables thus contributing to a negative ecological balance compared to locally grown foods.

Other manners in which many North American pagans have got involved with the movement are through political and / or ecological activism, such as " vegetarian groups, health food stores " or feminist university courses.

Hybridization with the subspecies that evolved southwestwards of its range, S. c. massaicus, has apparently been prevented from occurring on a significant scale by ecological separation, the Somali Ostrich preferring bushland where it browses middle-height vegetation for food while the Masai Ostrich is, like the other subspecies, a grazing bird of the open savanna and miombo habitat.

The community houses students and student families, and it includes a child development lab, an environmental studies demonstration house, wetlands, a permaculture food forest, individual gardens, and the " ecological machine ," which is a wastewater treatment system that naturally treats sewage to reuse quality.

The ecological collapse which followed has been variously attributed to overpopulation, slave traders, European diseases ( including a smallpox epidemic which killed so many so quickly, the dead were left unburied and a tuberculosis epidemic wiped out a quarter of the population ), social upheaval ), understand that food supply can vary and also that other factors in the environment can alter humans ' need for food.

" Although there is no blueprint for realizing this goal, ecovillages may integrate various aspects of ecological design: ecological building, alternative energy, environmentally benign manufacturing or production, permaculture ( landscaping designed to mimic nature and to provide the community with food, fibre and fuel ), and community building practices.

Phytoplankton serve as the base of the aquatic food web, providing an essential ecological function for all aquatic life.

Agroecology – application of ecological principles to the production of food, fuel, fiber, and pharmaceuticals and the management of agroecosystems.

The ecological niche describes how an organism or population responds to the distribution of resources and competitors ( e. g., by growing when resources are abundant, and when predators, parasites and pathogens are scarce ) and how it in turn alters those same factors ( e. g., limiting access to resources by other organisms, acting as a food source for predators and a consumer of prey ).

Berg and Rosselli state that the genus is characterized by some unusual traits: spathes fully enclosing the flower-bearing parts of the inflorescences until anthesis, patches of dense indumentums ( trichilia ) producing Mullerian ( food ) at the base of the petiole, and anthers becoming detached at anthesis ( Berg and Rosselli, 2005 ). Cecropia is most studied for its ecological role and association with ants.

Sustainable agriculture seeks to assure a continued supply of food within the ecological, economic and social limits required to sustain production in the long term.