UK D1 At the scale of the MSFD subregions, and in line with prevailing conditions, the loss of biodiversity has been halted, and where practicable, restoration is underway. The abundance, distribution, extent and condition of species and habitat in UK waters are in line with, prevailing environmental conditions as defined by specific targets for species and habitats. Marine ecosystems and their constituent species and habitats are not significantly impacted by human activities such that the specific structures and functions necessary for their long-term maintenance exist for the forseeable future. Habitats and species identified as requiring protection under existing national or international agreements are conserved effectively through appropriate national or regional mechanisms.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D10 "The amount of litter, and its degradation products , on coastlines and in the marine environment is reducing over time and levels do not pose a significant risk to the coastal and marine environment, either as a result of direct mortality such as through entanglement, or by way of indirect impacts such as reduced fecundity or bioaccumulation of contaminants within food chains. ". 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D11 "Loud, low and mid frequency impulsive sounds and continuous low frequency sounds introduced into the marine environment through human activities do not have adverse effects on marine ecosystems: Human activities potentially introducing loud, low and mid frequency impulsive sounds into the marine environment are managed to the extent that no significant long term adverse effects are incurred at the population level or specifically to vulnerable/threatened species and key functional groups. Continuous low frequency sound inputs do not pose a significant risk to marine life at the population level, or specifically to vulnerable/threatened species and key functional groups e.g. through the masking of biologically significant sounds and behavioural reactions ". 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D2 The risk from pathways and vectors which facilitate the introduction and spread of NIS as a result of human activities is significantly reduced, leading to a reduction in the risk of introducing new species some of which may have adverse impacts.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D3 The level of stock mortality generated by fishing activity (F) is equal to or lower than Fmsy - the level capable of producing Maximum Sustainable Yield (MSY). The spawning stock biomass is within safe biological limits and all stocks are sustainably exploited.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D4/D1 At the level of the MSFD sub-regions, populations of key species groups within the food web have an age and size structure indicative of sustainable populations and occur at levels that ensure the long-term sustainability of the marine ecosystem of which they are part, in line with prevailing conditions, as defined by specific targets for species and pelagic habitats. There should be no significant adverse change in the function of different trophic levels in marine food webs as a result of human activities, including as a result of by-catch and discards.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D5 "Human-induced eutrophication in UK seas is minimised and all UK marine waters are non-problem areas: • Nutrient concentrations do not lead to an undesirable disturbance to the balance of organisms present in the water or to the quality of the water concerned resulting from accelerated growth of algae; and • The direct effects of nutrient enrichment associated with algal growth do not constitute or contribute to an undesirable disturbance to the balance of organisms present in the water and to the quality of the water concerned ; and • Indirect effects of nutrient enrichment associated with growth of macroalgae, sea grasses, and reductions of oxygen concentrations do not constitute an undesirable disturbance to the balance of organisms present in the water and to the quality of the water concerned.". 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D6/D1 Sea-floor habitats (physically and structurally) are both productive and sufficiently extensive at the level of the MSFD sub-regions, to carry out natural functionality, including the necessary ecological processes which underpin ecosystem goods and services, and are capable of supporting a healthy and sustainable ecosystem for the long term.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D7 The nature and scale of any permanent changes to the prevailing hydrographical conditions (including but not limited to salinity, temperature, pH and hydrodynamics) resulting from anthropogenic activities (individual and cumulative), having taken into account climatic or long-term cyclical processes in the marine environment, do not lead to significant long term impacts on those biological components considered under Descriptors 1,4, and 6.. 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D8 Concentrations of contaminants in water, sediment, or biota are kept within agreed levels (Agreed at a national/EU/International level e.g. within domestic legislation, Regional Seas Conventions etc.) and these concentrations are not increasing; and; The effects of contaminants on selected biological processes and taxonomic groups, where a cause/effect relationship has been established, are kept within agreed levels (Agreed at a national/EU/International level e.g. within domestic legislation, Regional Seas Conventions etc.). 201304 Same as last reported determination UK_CS_0 UK_GNS_0 D9 Concentrations of contaminants in fish and other seafood caught or harvested for human consumption in UK seas do not exceed the relevant maximum levels listed in EU Regulation 1881/2006 (as amended)or other relevant standards and are not increasing. 201304 Same as last reported determination UK_CS_0 UK_GNS_0