Marine pollution is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrates or phosphates, stimulate algae growth. Many potentially toxic chemicals adhere to tiny particles which are then taken up by plankton and benthic animals, most of which are either deposit feeders or filter feeders. In this way, the toxins are concentrated upward within ocean food chains. Many particles combine chemically in a manner highly depletive of oxygen, causing estuaries to become anoxic. When pesticides are incorporated into the marine ecosystem, they quickly become absorbed into marine food webs. Once in the food webs, these pesticides can
Food and drink in Birmingham A notable development of eating out in Birmingham occurred in August 2012 with the establishment of the "Digbeth Dining Club" (DDC) by the former cameraman Jack Brabant. On a weekly basis a street food market is held at Unit 2 Lower Trinity Street on Friday evenings from 5PM. On 17 and 18 September 2016 the British Street Food Annual Awards was held at the site. From January 2017 the DDC was held two evenings per week, Fridays and Saturdays, with the emphasis on Saturdays being on music and street entertainment. Birmingham has numerous restaurants which are parts of nationwide chains.