Description
The applicative model here displayed is a schematic conceptual model that simplifies the most important socio-ecological elements related to the management of N2K sites and their connections. The idea behind the creation of this model was to connect the ecological/oceanographic observing systems of ECOAdS with the management of Natura 2000 network (N2k).
The conceptual model is made by different boxes containing the elements related to the management of N2K sites. There is no distinction in terms of size of the boxes, while the colour defines the kind of elements related to the N2K management: social, ecological and oceanographic elements. Social elements (yellow boxes) are characterized by all those elements concerning the governance domain of N2K management: EU Directives targeted by ECOSS (i.e. HD, BD, WFD, MSFD), the public/management authority of the N2K sites, the management goals, objectives, conservation measures/Action plan, the stakeholders involved in the N2K sites and human activities. The ecological elements (green boxes) are: target species and ecological processes for which N2K sites were designated, the ecosystem services, the ecological monitoring programmes and the ecological variables they measure. Oceanographic elements (blue boxes) include global changes, ocean processes, oceanographic observing system and the monitored oceanographic variables. Performance indicators constitute a crosscutting element (orange box), since they can be obtained from single ecological or single oceanographic variables, combinations of multiple ecological or multiple oceanographic variables, or even combinations of one or several ecological variables with one or several oceanographic variables. The monitoring programmes, the variables and the performance indicators are then all included in the ECOAdS box (red box).
The spatial arrangement of the boxes in the model follows a hierarchical organization: boxes at the top and at the bottom of the model refer to global aspects such as EU Directives, wide-scale monitoring programmes and ecosystem services, while in the centre of the model, the elements are related to local aspects of the N2K sites, such as goals, objectives, target species and ecological processes. Arrows indicate the relationships among the elements. They can go in one direction from one box to another or can be bi-directional in case elements are expected to influence each other. Dotted lines indicate data flow, while continuous lines indicate a causal relationship between two boxes based on the direction of the arrow. Terms upon arrows specify the type of relationship linking two boxes. While the conceptual model was built around the need to manage N2K sites, i.e. with the box ‘MPA Management Goal’ as an entry point, different users may use different entry points according to their needs: a stakeholder may start at the Stakeholder box, a public authority at the Public/Management authority box, and so on.
Human Interaction
- Po Delta Regional Park Authority of Veneto Region
- Policy-makers
- Fishermen
- Private companies
- Local organizations
- Research community
- General public
- EU DIRECTIVES
- Conservation of target habitats and species at a favourable status in the Po Delta
- Regulate human activities
- Establish no-fishing zones
- Increase N2K site size
- Establish network of N2K sites
- Increase public awareness, enforcement, monitoring
- Remove invasive species
- Remove litter
- Improve water quality
- Improve water circulation
- Restore target species & habitats
- Maintain/restore the current status of target species
- Increase genetic diversity of the Adriatic sturgeon
- Improve water quality
- Minimize the impact of aquaculture
- Control predators of target bird eggs
- Decrease tourism
- Monitor and limit fishing
- Create/restore habitats of target species
- Reduce hydrological alterations
- Minimize impact of artificial structures
- Reduce impact of invasive species
- Reduce impact of marine litter
- Minimize the effects of climate changes and possible diseases
- Com&Rec. fishing
- Construction of infrastructure
- River engineering works and modification
- Aquaculture
- Tourism Sailing
- Land based activities
Ecological processes, Habitat and Target Species
- Alosa fallax Seagrasses
- Seabirds
- Acipenser naccarii
- Petromyzon marinus
- Habitat maintenance
- Cultural heritage
- Food provisioning
- Tourism recreation
- Climate regulation
- Water flow regulation
- Erosion prevention
- Destructive and non-destructive samplings
- Field and lab. experiments
- Lab. analyses
- Cover
- Density
- Abundance
- Age
- Sex
- Biometric measures
- Genetic information
- Distribution
- Biomass
- Number of new born
- Phenology related measures
- Dispersal
- Behaviour metrics
- Spawning stock biomass
- Survival/ birth/ death/ growth/ reproductive/ settlement/ recruitment/ migration/ spawning rates
- Number of interaction with fishing nets over a unit of time
- Site fidelity, group dynamics, and seasonal and yearly occurrence
- Fishery catches
- Type of fishing gears
- Fishing effort and distribution
- Contaminant concentration in organism tissues
- Number of deaths and number/cover of affected organisms due to physical disturbances, disease or climate change
- Surface area devoted to aquaculture
- Abundance and biomass of benthic organism
- Diversity indices
- Infaunal trophic index
- Number of boats in channels and basins
- Composition and abundance of phytoplankton
- Cover and composition of macrophytes
- Relative abundance of the dominant macroalgae
- Composition, abundance and species richness of macrozoobenthos
- Species composition, abundance, population structure of fish
- Number and type of barriers to migration
- Number of visitors during the nesting season
- Number and distribution of nesting sites
- Surface area of habitat restored or created
- Ratio of predator-to-prey
- Abundance of target species predators
- Abundance/cover of invasive vs native species
- Amount, weight and type of litter ingested
- Number/cover of individuals adversely affected by litter
- Amount and weight of litter in water and on seafloor in items per km2
- Erosion-recolonization rate of seagrasses
- Number of extreme events
- Spatial and temporal distribution of the disturbance
- Extent in km2 per broad habitat type affected
- Gonad mass as a proportion of the total body mass (%)
- Spatial and temporal variation of hydrographical conditions
- Number of suitable sites for reproduction, feeding, resting
- Frequency, intensity, duration, spatial extent and species composition of harmful algal blooms
- Area covered by and structure of the suitable habitats
- Timing and duration of the estuarine phase
- Patch size of seagrasses and leaf elongation rate
- Net primary productivity
- Associated organisms
- Density and abundance of herbivores
- Area cover destructed by anchoring-trawling
- Biomass of epiphytes
Oceanographic Variables
- Water circulation
- River outflow
- Sedimentation
- Temperature and pH alteration
- Extreme events
- Water sampling
- Mobile and fixed monitoring systems
- Remote sensing modelling outputs (Copernicus, IPCC)
- Temperature
- pH
- PAR
- Transparency
- Chl-a
- Salinity
- Depth
- Slope
- Current velocity and direction
- Water level
- Amount of water withdrawn
- Amount of precipitations
- Monthly mean of water flow
- Magnitude, duration of annual extreme flows Timing of annual extreme flows
- Frequency and duration of high and low pulses Rate and frequency of flow changes
- Concentration of dissolved oxygen, nutrients and contaminants in water and sediments
- Redox potential
- Type of sediments
- Grain size
- Organic matter % cover of sediment
- Sedimentation rate
Performance Indicators (coming from ecological variables)
- Population demography
- Genetic diversity
- Phenological shift
- Mortality rate and proportion of affected organisms due to physical disturbances, disease or climate change
- Trends in cover/density of invasive species
- Water quality indices
- Nutrients and contaminants below the threshold limit value
- Trends in the amount of litter in water and on the seafloor
- Trends in number/cover of individuals affected by litter
- Trends in the amount and composition of litter ingested by organisms
- Predation rate
- Population structure of the predators
- Birth rate
- Variation in population structure
- Area of affected habitat
- Gonadosomatic index of fish
- Trends in number of visitors Increase in surface area of optimal habitats
- Frequency of interactions with fishing boats
- Fishing mortality
- Spawning stock biomass of fish
- Significant decrease of physical disturbance and loss of optimal habitats for target species
- Presence of barriers for migratory fish
- Alteration of the benthic functional diversity and ecosystem functionality
- Variation in surface area occupied by aquaculture
- Variation of indicators of hydrologic alteration
- Distance upstream of the salt wedge
- Variation in sedimentation rate and levels of turbidity
- Trends in number of boats in channels and basins