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![Page 1: Threats & Remedies in Aquatic Ecosystems Professor Mike Elliott & research staff from IECS Mike.Elliott@hull.ac.uk Institute of Estuarine & Coastal Studies,](https://reader033.fdocuments.in/reader033/viewer/2022051516/56649ef55503460f94c0847b/html5/thumbnails/1.jpg)
Threats & Remedies in Aquatic Ecosystems
Professor Mike Elliott & research staff from IECS
Institute of Estuarine & Coastal Studies, University of Hullhttp://www.hull.ac.uk/iecs
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Relevant texts:• Clark, RB, (2001). Marine Pollution, OUP, (5th Ed)
• Gray, JS & M Elliott (2009) Ecology of Marine sediments: science to management, OUP (2nd Ed.).
• Kaiser, M et al (2005) Marine Ecology Processes, Systems, and Impacts, OUP
• McLusky, DS & M Elliott (2004) The Estuarine Ecosystem: ecology, threats & management, OUP (3rd Ed)
• especially journals: Marine Pollution Bulletin, Estuarine Coastal & Shelf Science, Estuaries & Coasts, Marine Ecology Progress Series, Ocean & Coastal Management, etc.
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‘The Appliance of Science’
understand the problem
&
understand the biology, physics and chemistry
then
interpret, understand and predict the effects
then
society (i.e. us) to act and either pay for solving problems or to stop the problems occurring?
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‘My husband writes Whodunnits, Thriller, Suspense and Horror stories - he specialises in books and articles on global pollution.’
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What do we expect for/from the sea?
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‘Hold it! I don’t know about you lot, but I’m not jumping into that!’
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Dead guillemots on the beach - why?
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Dying bottle-nosed whale in an estuary - why?
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Large-scale incidents - high in public awareness
but: the sperm whale died of old age rather than pollution
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Challenges for science & management:
• Recovery/coping with historical legacy• Endangered coastal and marine ecosystem
functions• Legal & adminstrative framework• Economic prosperity and delivery of societal
benefits• Coping with climate change & moving baselines
There is only one big idea in marine management: how to maintain and
protect ecological structure and functioning while at the same time
allowing the system to produce ecosystem services from which we
derive societal benefits.
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DPSIR Approach (NB cyclical to helical)
Pressures (suite from each driver)
State changes (environmental/natural variables)
Impact (on human uses and on users)
Response (economic, governance actions, etc)
Drivers (human activities responsible)
Fulfil ‘The Ecosystem Approach’ (D+P)+R ≠ (S+I)
Approach
Is it a definitio
n
or a tool for th
e
EcoApp?
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Hence we need:Drivers for managementTools for management
Endpoints/Outcomes of management
Therefore:
Manage for both ecology and economy (reason)
Using both technology and administrative bodies (tools)
Within both laws and governance (drivers)
For both society and politics (drivers)
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Aim (economic & ecological goods & services)
Set indicators (birds/fishes; tonnage/ wealth creation, quality of life/non-infraction)
Perform monitoring (surveillance, condition, compliance, investigative)
Measure status (EII, habitat mapping)
Action required (defined in advance)
Set objectives (ecological, economic, societal, legislative)
Fulfil ‘The Ecosystem Approach’
Action not required Tool!
Tool!
Tool!Tool!
Outcome!
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Drivers
10 Tenets
Pressures
Objectives
State Change
SMART
HypothesesAims
ImpactsPESTLE
The Ecosystem Approach - Unifying Concepts
Symptoms of Ecosystem Pathology
12 Principles
Indicators
Indicators
Indicators
Response
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P.E.S.T analysis (modified)
• The organisation of an environment can be analysed by conducting a P.E.S.T analysis.
• This is a simple analysis of an environment’s Political, Economical, Social and Technological organisation.
• By adding legal aspects, this extends to P.E.S.T.L.E.
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The six tenetsTo be successful, management measures or responses to changes resulting from human activities should be:•Ecologically sustainable•Technologically feasible•Economically viable•Socially desirable/tolerable•Legally permissible•Administratively achievable•Politically expedient•Ethically defensible (morally correct)•Culturally inclusive•Effectively communicable
The seven tenetsThe ten tenets
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What goes into the sea?
• sewage & organic matter
• Biological pollutants incl. microbes
• oils• chemicals• agro-chemicals• minerals• heat• litter
• land claim• barrages• water removal• navigation• fisheries• dredging• mineral exploration• recreation & amenity
So what else do we do?
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Effects of Human Activities
Aim:
description & prediction (scientific questions)
then:
reduction (socio-economic-political questions)
Need knowledge of:
features of the system
how the system works
type of threats
how the system responds to threats
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The need for Indicators to describe:
• Condition of ecological/ecosystem elements• extent of Pressures exerted on elements
• Responses to either the condition or changes to it
Leading to: DPSIR approach:• Driving forces (human activities responsible)• Pressures (e.g. emissions)• State change (environmental variables)• Impact (changes in system) (also Welfare)• Response (measurement of policy options)
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Main Questions for Science:
What is the normal situation?
How does it vary?
Has there been a change?
How big is the change?
What caused it?
(Can something be done about it?)
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Functioning, legislative drivers, & in-situ & ex-situ pressures
Ecological & economic goods & services
Ecosystem Approach
Hey, YOU the ecology-manager -
how many invertebrates do you want in the estuary?
how many fishes do you want in the estuary?
how many birds do you want in the estuary?
how much saltmarsh do you want around the estuary?
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Functioning, legislative drivers, & in-situ & ex-situ pressures
Ecological & economic goods & services
Ecosystem Approach
Hey, YOU the Lord Mayor -
how much protection do you want around the estuary?
how many fishermen do you want in the estuary?
how much land claim do you want from the estuary?
how much pollution do you want in the estuary?
how many ships do you want in the estuary?
how many people do you want around the estuary?
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Functioning, legislative drivers, & in-situ & ex-situ pressures
Ecological & economic goods & services
Ecosystem Approach
Hey, YOU -
how much science do you want for the estuary?
how much ecological carrying capacity do you want in the estuary?
how much socio-economic carrying capacity do you want in the estuary?
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Functioning
What should there be (status)?
Ecological & economic goods & services
Ecosystem Approach
& why (habitat needs)?
What is lost (reduced carrying capacity)?
No
Pro
duce
M
an
age
me
nt P
lan
!
Can it be recovered?
HMWB (hydromorphology)
Yes
Recreate habitats
Economic justification (xGEcS)
Report to EU
Compensate the system
Temporary habitat loss
Water quality barrier
Remedial action - pollution control
Restore habitat
Measure functioning (need indices of change)
Regain carrying capacity
Permanent habitat loss
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Legislative Drivers
Decide SMART objectives
Ecological & economic goods & services
Ecosystem Approach
Decide conservation goals
Decide quantitative standards
Check AQC/QA
Pro
duce
M
an
age
me
nt P
lan
!
Create/agree methods
Perform compliance monitoring
Report to EU/OSPAR
Check compliance with standards
Pass
Fail
Investigative monitoring
Remedial work
Agree licences/permits/consents
Surveillance monitoring
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Response to In-situ pressures
What does society want?
Ecological & economic goods & services
Ecosystem Approach
Materials taken out Materials
put in
Quantify EII 1 (hydromorphology)
Produce Management Plan!
Maintenance of socio-economic carrying capacity
Quantify EII 2 (pressures)
Reported to EU/OSPAR
Lead to (quantify) EII 3 (environmental quality)
Breach legislative driver
Remediation/mitigation/ compensation
Spatial & temporal change
Loss of ecological carrying capacity
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Response to Ex-situ pressures
Unmanaged exogenic pressures
Ecological & economic goods & services
Ecosystem Approach
Relative sea-level rise
Coastal squeeze
Produce Flood Risk, Shoreline Management, Habitat etc Management Plans
Mitigation/ compensation/ acceptance
Soft/hard engineering
erosion
Wins for safety, economy, ecology
Options: Hold the line / retreat the line / advance the line / do nothing
Flooding/ storminess
Best practice in habitat creationNeed for single management plan?!
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Response to Ex-situ pressures
Ecological & economic goods & services
Ecosystem Approach
Overfishing of migratory & nursery species
Anthropogenic
External effects on breeding populations
Natural
Influences far from TW (e.g. eels breeding in Atlantic, waders in high Arctic)
Upstream
Physical & chemical barriers (e.g. weirs & on salmonids)
⇒ Catchment and marine management plans and marine spatial planning linked to climate change strategies!
At sea
Impacts on indigenous species, communities & their prey & predators
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Response to Ex-situ pressures
Ecological & economic goods & services
Ecosystem Approach
Climate and weather patterns (incl. NAO) Freshwater
resources and run-off
Influence on organisms’ distributions and reproduction
Point source pollution and WQ impacts
Temperature effects related to organisms’ tolerances
⇒ Catchment and marine management plans and marine spatial planning linked to climate change strategies!
Impacts on indigenous species, communities and their prey and predators
Encouragement for invasive and introduced species
Diffuse (nutrient) inputs
Salinity balance
Creation of biological pollution
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relative sea level rise
set-back/ managed
retreat
wetland/habitat creation
increase in refugia
fisheries support
“coastal squeeze”
tidal area reduction
loss of prey/ feeding area
reduction in carrying capacity
fisheries repercussions
marine incursion
salinity/depth alteration
increased storminess
erosionincreased need for refugialoss of
habitat
substratum change
community displacement
e.g. movement of brackish
specieschange in
prey availability
Climate Change - Effects on Invertebrates, Fishes & Fisheries I
coastal adjustment
‘Exogenic Unmanaged Pressures’
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Climate Change - Effects on Invertebrates, Fishes & Fisheries II
Altered temperature regime
disruption of breeding cycle
northern species
reproduction delayed
southern species
reproduction enhanced
competitive disadvantage
competitive advantage
species distribution change
e.g. northern species decrease
in area
e.g. southern species increase
in area
change in community structure
fisheries repercussions
increase / decrease of ‘rare’ / ’fragile’
species
conservation management repercussions
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Physico-chemical attributes
Fundamental niche
Community functional attributes
Community structural attributes
Anthropogenic
distortions
Anthropogenic
distortions
Anthropogenic
distortions
Anthropogenic
distortio
ns
env.-biol. linksbiol.-env.
links
biol.-biol. links
Marine/Estuarine Community – Forcing Variables
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Causes of Estuarine/Coastal Change Resulting from Human Activities
(a) Sources of inputs/pollutants:
• natural solids - to offshore areas, from river catchment (erosion, leaching);
• urban areas - domestic wastes (effluent, sludge);
• industrial processes - brewing, distilling, pulp and paper making, chemical, petrochemical (onshore and offshore);
• dredging, mineral exploration and extraction, marine excavation and drilling - disturbance and effects;
• shipping - accidents, garbage, illegal practices (e.g. tanker washings);
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Causes of Estuarine/Coastal Change Resulting from Human Activities
(a) Sources of inputs/pollutants (continued):
• power generation - thermal pollution, fly-ash production, radionucleiides, biocides;
• industrial wastes - collieries, china-clay waste, land-claim schemes;
• agriculture and aquaculture - practices and malpractice (erosion, pesticides, fertilisers, food);
• atmosphere - solids and soluble inputs.
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Causes of Estuarine/Coastal Change Resulting from Human Activities
(b) Other activities:
• barrages (for safety, amenity, power) - hydrographic changes;
• abstraction (cooling water, desalination) - biota removal, mortality;
• commercial fishing - bycatch mortality;
• land-claim and coastal protection - habitat loss, disruption of sediment and hydrophysical regime;
• offshore and onshore wind power - environmental disruption;
• naval activities - mortalities, reduction of habitat.
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Human needs for/uses and abuses of the coast:fisheries (potting, trawling, etc.) telecommunications cablesurban areas, infrastructure recreation/tourismalternative energy generation(wind, tidal, wave)
conventional energy generation(nuclear, coal, oil, gas)
land claim waste dischargecoastal defence military usesnavigation/shipping safety (lifeboats/coastguards)ports/harbours aquaculturedredging/spoil disposal agricultureaggregate extraction water abstractionindustry (petrochemical, food,etc.)
oil and gas exploration/extraction
barrages (amenity, safety) education, researchwildlife, conservation
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Anthropogenic Causes of Change
xenobiotics/toxins
physical additions
energy change
physical structures
overstimulation of biota
introduced organisms (microbes (health) &
macrobes)
mutagenic response
removal of biota
Categories of Pollutants
trace metals
synthetic organic compounds
hydrocarbons
radioactivity
inert (physical) materials
nutrients
organic matter
energy
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Traditional Threats (a) vs. Emerging Issues (b)
(a)• Contaminant levels• Physical & chemical
Pollutants• Water quality• Toxicity• Fisheries• Land claim• Land use• Microbial pollutants
(b) • Irreversible habitat change – loss• Reduction in productivity and
biodiversity• Nutrient cycling modification• Land change and use• Climate variability and global
change• Macro-biological pollution• Sustainable fishing• Marine energy• Trace organics, POPs, EDS,
antibiotics
(modified & greatly expanded from Boesch & Paul 2001)
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Pollutants (old vs. new problems)Chemical:
• Heavy metalsO
• Organic matterO
• RadioactivityO
• HydrocarbonsO
• HeatO
• NutrientsN • Persistent organicsN
Biological:• MicropathogensO • Ballast water migrantsO • Invasive macrophytesN
• Introduced parasitesN
• GMO’sN
• Escapees from cultureN
Physical:• Inert solids (sediment)O
• Thermal deformationsO • Litter/garbageN
• Large structuresN
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Endangered & Fragile Habitats:
Sabellaria
Introduced & nuisance species: Eriocheir sinensis
Introduced and harvestable species: Neogobius
melanostomus
(Elliott 2003)
BMNH
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Biodiversity changes & challenges:
• Biological pollution – introduced species• Effects of global warming – changing
distributions (e.g. Red Sea migrations; surrogate information from thermal discharges)
• Examples of habitat modification effects e.g. Eriocheir, Caulerpa
(Elliott, 2002; McLusky & Elliott, 2004; Olenin et al., 2011)
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Future – biodiversity change:
• Determine what’s there and what’s been lost• Quantify niche creation• Quantify rate & processes of filling niches• Determine sequence depending on time of start• (Fulfil management actions in these)
(Elliott, 2002;
McLusky & Elliott, 2004)
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Comparison of the health of medical and environmental systems (modified from Elliott & Cutts 2004; see Tett et al., MEPS 2013)
Unhealthy systems?
Medical (*1) –• Diagnosis• Prognosis• Treatment• Recovery
Prevention (*1 Steevens et al 2001 - Human Ecol. Risk Ass.)
Environmental –• Assessment (*2)
• Prediction• Remediation/Creation/
Restoration• Prevention
(* 2 using extension of symptoms for the diagnosis of ecosystem pathology)
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Attributes for the diagnosis of ecosystem pathology:
= 7 indicators for general application:
• primary production• nutrients (fate & effects)• species diversity (abiotic areas)• community instability (biotic composition)• size and biomass spectrum• disease/anomaly prevalence• contaminant uptake and response
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Biological change
changes in cells
changes in organisms
changes in populations
changes in communities
changes in ecosystems
Speed of response
Inherent variability
Ease of detection of effect
Complexity of system
Specificity of cause
Confidence in methods?
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Biological change
changes in cells
changes in organisms
changes in populations
changes in communities
changes in ecosystems
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Pollution effects in fishes – conceptual model (Elliott & Hemingway, 2002; also Elliott et al 2003; Lawrence & Hemingway 2003 - XENOFISH)
Environmental
homeostasis -
resilience?
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Temporal severity (longevity/duration)
• instantaneous
• short-lived (hours-weeks)
• intermediate (weeks-months)
• long-lived (years-decades)
• ‘infinite’ (centuries/millennia)
Spatial severity (area affected)
• local/district
• regional
• national (intra-boundary)
• international (transboundary)
• intercontinental
• global
Extent of Impact
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Content & (Spurious) Definitions:
Ecosystem = ((Σp.Δp) + (Σc.Δc) + (Σb.Δb) + (δb/δc) + (δb/δp) + ((Σc.Δc)-Σb) + ((Σp.Δp)-Σb)).h
Where p, c, b, h = physical, chemical, biological, human attributes
And:
Ecosystem Approach = ((D + P) + R) (S + I)
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A strategy for the integrated management (*) of land, water and living resources that promotes conservation (*) and sustainable use (*) in an equitable way.
Its application will help to reach a balance of the three objectives (*) of the Convention.
Based on applying appropriate scientific methodologies focused on levels of biological organization which encompass the essential processes, functions and interactions among organisms and their environment.
It recognizes that humans, with their cultural diversity, are an integral component of ecosystems.
www.biodiv.org
CBD Ecosystem Approach
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Where it is mentioned?
The Ecosystem Approach is implicit or explicit in all recent marine management initiatives, including estuarine management plans.
This includes, within Europe:• the EC Water Framework Directive (WFD), • the EC Habitats Directive, • the EU Marine Strategy (and the proposed Marine
Framework Directive) and the ICZM Directive, • OSPAR Annex V, • the EU Common Fisheries Policy ecosystem
approach for fisheries, • ICES ecosystem approach, • Strategic Environmental Assessment, • FAO Ecosystem Approach to fisheries management, • English Nature, Environment Agency, etc.
And millions of
sites on Google!
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The Ecosystem-based Approach:
• Common Fisheries Policy (CFP) (January 2003) - the incorporation of a more ecosystem-based approached to fisheries management through the introduction of recovery plans for threatened stocks and management plans for non-threatened stocks; way forward to a sustainable fishing industry.
• JNCC - Marine fisheries ……. dependent on the productivity of
the ecosystem, and fisheries have an effect on, and are affected by, the supporting ecosystem of the target species. It, therefore, follows that prudent and responsible fisheries management should take account of the profound interactions between fisheries and their supporting ecosystem.
• Convention on Biological Diversity: 'a strategy for the integrated management of land, water and living resources that promotes conservation and sustainable use in an equitable way.'
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( explicit, I implicit)
Ecol Econ Tech Soc Leg Adm Polit Mor Cul Com
1 Societal choices I
2 Subsidiarity I I
3 Inter-ecosystem effects I I I
4 Economic management I I
5 Maintain ecosys. serv. I I I I
6 Maintain ecosys. func.
7 Appropriate spatial & temporal scales
I I
8 Long-term management
I I I I I I
9 Manage for variability
10 Manage to conserve & use biodiversity
I
11 Use best practice, all 'data'
12 Stakeholder input, incl. science
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EFFECTS OF HUMAN ACTIVITIES & FATE OF INTRODUCED MATERIALS
Aim: description, prediction, reduction:
Need knowledge of:
Behaviour/characteristics of the system;
Physical/chemical nature of system;
Physical and chemical behaviour of additives to system;
Behaviour/characteristics of an activity in environment;
Habitat at risk from modification or materials addition;
Inert or biologically effective action;
Biotic and non-biotic component(s) at risk;
Behaviour of contaminants within organisms;
Structure & functioning of biological system;
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EFFECTS OF HUMAN ACTIVITIES & FATE OF INTRODUCED MATERIALS
Aim: description, prediction, reduction
Variability of components leading to:
increase in 'signal to noise' ratio,
prediction & quantification of effect (scientific questions);
reduction or removal of effect (socio/economic/political questions).
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Integrated Environmental Assessments
e.g.community health
(sea-bed quality as shown by benthic analyses);
individual health (as shown by invertebrate bioassay, e.g. Macoma
burrowing);
environmental (abiotic component) degree of contamination
(concentration of persistent chemicals in sediments)
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Topics for Consideration
1. Occurrence of pollutants in steady-state.
2. Movement of pollutants through system.
3. Fate of pollutants if persistent.
4. Lethal effects structural changes.
5. Sub-lethal effects, functional changes.
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The nature of European Union Directives: control and assessment of contaminants
Note the changing nature of EU Directives and the OSPAR, HELCOM & Barcelona
Conventions:
from a sectoral (pollutant orientated) approach to an holistic, ecosystemic
approach
Changes to Legislative/Administrative/Policy Drivers
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The Estuary & Coast - Major European Union Legislative /Administrative/Policy Drivers
From the Sectoral:
• Urban Waste-water Treatment
• Integrated Pollution Prevention & Control
• Titanium Dioxide
• Shellfish Growing Waters & Health
• Shellfish Harvesting
• Bathing Waters
• Dangerous Substances + Daughters
• Freshwater Fishes
To the Holistic:
• Environmental Impact Assessment
• Habitats & Species
• Wild Birds
• Nitrates
• Strategic Environmental Assessment
• Water Framework
• Environmental Liability
• Marine Spatial Planning & Coastal Management?
• Marine Strategy Framework
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Examples of the transition:
From the Dangerous Substances Directive (and its Daughter Directives)
to:
the IPPC Directive (Integrated Pollution Prevention and Control).
From the Nitrates Directive
to:
the WFD (Water Framework Directive).
Changes in Direction of EU Directives:
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The Estuary & Coast - Major Legislative/Administrative/Policy Drivers (2)
EU Agreements:• Common Fisheries Policy• Common Agricultural Policy• Integrated Coastal Zone Management?
UK Enabling Legislation
International:• North Sea Ministerial Conferences• OSPAR Convention & Strategies• London Convention• IMO – Marpol• ICES
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The Health & Integrity of the Humber Environmental Quality Objectives
1. The protection of all of the existing defined uses of the estuary system;
2. The ability to support on the mud bottom the biota necessary for sustaining sea fisheries;
3. The ability to allow the passage of migratory fish at all stages of the tide.
(Based on those proposed by Royal Commission on Environmental Pollution, 3rd report 1972)
(Define EQO, derive EQS, set consent conditions and discharge limits bearing in mind EU Directives, PARCOM,
the 'precautionary principle and the Red list')
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ENVIRONMENTAL MANAGEMENT
What are the 'legitimate' uses of the system?
(What are the accepted uses?)
What are the human demands on the system?
What/where are the conflicts?
(Do activities conflict spatially/temporally?)
Can the physical/biological system cope?
(Can adverse effects be detected?)
Should/can the activity be stopped?
(Can the conflicts be tolerated?)
Would zoning resolve potential/actual conflicts?
Are mitigation measures feasible?
(Should mitigation measures be carried out?)
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Environmental Impact AssessmentImpact:
distinguish between substantial, moderate, slight, according to:
(i) magnitude of impact itself;(ii) value and sensitivity of receiving landscape;(iii) sensitivity of the potential visual receptors;
(methods suggested by the Institute of Environmental Assessment and the Landscape Institute Guidelines);
Main Steps in EIA:1) identification of the potential sources of impact;2) description of the receiving landscape;3) the evaluation of the potential impacts;4) the determination of mitigation measures possible;5) the identification and quantification of residual impacts which may be medium or long term.
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EU - "EIA" DIRECTIVE (85/337/EEC)(on the assessment of the effects of certain public
and private projects on the environment)
EIA to identify, describe and assess in an appropriate manner the direct and indirect effects of a project on
the following:
humans, fauna and flora;soil, water, air, climate and the landscape;
the interaction between i) and ii);material assets and the cultural heritage.
Developer to provide Minimum InformationResponsibility of Member States
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Minimum Information provided by the developer:(i) a description of project (e.g. site, design and size of
project);(ii) measures envisaged to avoid, reduce and, if possible,
remedy significant effects;(iii) data to identify and assess the main environmental
effects;(iv) a non-technical summary of i) to iii).
Member States' responsibility:make information available to public;
allow public opinion before project started;specify methods of public consultation (time and place);
notify public of the decision and conditions;comply with Directive from July 1990.
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Aim:
to define the spatial importance of any receptor and the significance of any impact on the receptor; include synergistic/antagonistic interactions and cumulative impacts:
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EIA – Quantification of change (spatial extent and temporal duration)
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Potential impact scenarios:
MOLF Construction & Operation (e.g. Solway estuary)
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Potential impact scenarios:
Effluent Dispersal Pipeline
Operation (e.g. Solway estuary)
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EIA – Impact quantification, e.g. EDP Solway Estuary
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Ecosystem health assessment (or monitoring) programme:
1. Analysis of main processes and structural characteristics of ecosystem;
2. Identification of known or potential stressors;
3. Development of hypotheses about how those stressors may affect each ecosystem;
4. Identification of measures of environmental quality and ecosystem health to test hypotheses.
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Selection Criteria for Ecosystem Response
- high signal to noise ratio
- rapid response
- reliability/specificity of response
- ease/economy of monitoring
- relevance to end point
- monitoring feedback to regulation
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Activity
Organic enrichment from domestic sewage, paper mills, etc.
Persistent contaminant inputs from industry
Port activities, dredging and spoil disposal
Effects
Poor water quality, effects on fish migrations, especially in upper reaches.
Bioaccumulation, induction of detoxifying mechanisms.
Damage to feeding and nursery grounds.
e.g. Estuarine impacts on fishes and fisheries
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e.g. Estuarine impacts on fishes and fisheries (continued)
Activity
Power generation and water abstraction
Commercial fishing
Land-claim, engineering works
Naval activities, underwater testing
Effects
Thermal pollution effects and mortalities on intake-screens.
By-catch mortalities of non-commercial sizes and species.
Loss of feeding areas, especially disproportionately rich intertidal areas.
Mortalities of pelagic species.
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The need for Indicators to describe:
• Condition of ecological/ecosystem elements• extent of Pressures exerted on elements
• Responses to either the condition or changes to it
Leading to: DPSIR approach:• Driving forces (human activities responsible)• Pressures (e.g. emissions)• State change (environmental variables)• Impact (changes in system)• Response (measurement of policy options)
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‘Joined-up Environmental Thinking’:
Ecological Integration: habitat integrity, fit-for-purpose; User/Use Integration: move from sectoral approach; Management Integration: WFD / HSD / IMO(PSSA) /
OSPAR(Annex V) / BAP / WBD / ICES; Monitoring Integration: joint programmes for cost-
effectiveness; Environmental Integration: from site-based to wider
study (sites influencing and being influenced by events remote from the site);
Scientific Integration: responses to multiple stressors at several levels of biological organisation.