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ReefLink Database

Salinity

Salinity

Salinity is the dissolved salt concentration in water, and is the key factor distinguishing ocean water from freshwater. Marine species typically tolerate a range of salinity from 33-37 parts per thousand.

CMap

Algae are aquatic, photosynthetic plant-like organisms and include calcareous macroalgae, fleshy macroalgae, turf algae, and crustose coralline algae. Anemones & zooanthids are cnidarians very similar to coral, but are not characteristic reef builders. Climate reflects a region's temperature, humidity, air pressure, and weather. Coastal Development is the construction of infrastructure, buildings, homes, and roads in coastal communities. Coral is a colonial marine animal consisting of polyps. Cultural services are the nonmaterial benefits people obtain from ecosystems through spiritual enrichment, cognitive development, recreational opportunities, aesthetic experiences, sense of place, and educational and research opportunities. Discharge limitations are responses to regulate and control the discharge of pollutants and the use of chemicals. Discharges are the intentional or unintentional distribution of chemicals, debris, or other pollution, into the environment as a consequence of human activities. Ecosystem monitoring and restoration refers to responses to directly alter the condition of the reef ecosystem through restoration or remediation activities, setting limits on degradation through biological criteria or water quality criteria, or improving knowledge through monitoring, mapping, and scientific research. Ecosystem services are the benefits people obtain from ecosystems . Fish are cold-blooded aquatic vertebrates that breathe through gills and usually have scales. The Food and Raw Materials sector includes groups that harvest natural resources from the earth, including agriculture, aquaculture, fishing, forestry, mining, and the oil and gas industry. Impervious surfaces are surfaces, such as asphalt roads and concrete sidewalks. Infrastructural sectors provide the physical, organizational, and technical support for the economy to function, including construction, utilities, transportation, finance, manufacturing, wholesale and retail trade, and technical services. An Invertebrate is any animal that lacks a backbone. Landscape Changes are alterations of the natural landscape through human activities, including coastal development, shoreline armoring, impervious surfaces, deforestation, or soil disturbance, which can alter water flow patterns and lead to pollutant runoff into coastal systems. Landuse management pertains to responses that determine the use of land for development and construction. Marine vertebrates are aquatic animals with a backbone, such as sea turtles, whales, dolphins and marine birds. The Reef Ecosystem includes a suite of abiotic variables that form the physical and chemical environment. Plankton are any plants or animals that are too small to actively move against ocean currents. Pressures are human activities that create stress on the environment. Provisioning services are the products or ecosystem goods obtained from ecosystems, including seafood, genetic and biochemical resources, pharmaceuticals, ornamental resources, and water resources. The state of the Reef Ecosystem is the condition, in terms of quantity and quality, of the abiotic and biotic components including physical, chemical, and biological variables. Reef Habitat is the abundance, distribution, and condition of the benthic components of the reef ecosystem. Reef Inhabitants are all of the motile components of the reef ecosystem, including fish, invertebrates, marine reptiles and mammals, and are quantified by their abundance, distribution, and condition. Reef Life is the abundance, distribution, and condition of the biological components of the coral reef ecosystem. Regulating Services are benefits obtained from ecosystem processes that regulate the environment, including erosion regulation, natural hazard regulation, and climate regulation. Responses are actions taken by groups or individuals in society and government to prevent, compensate, ameliorate or adapt to changes in Ecosystem Services or their perceived value. Salinity is the dissolved salt concentration in water, and is the key factor distinguishing ocean water from freshwater. Socio-Economic Drivers include the sectors that fulfill human needs for Food & Raw Materials, Water, Shelter, Health, Culture, and Security, and the Infrastructure that supports the sectors. Sponges are sessile colonial animals with soft porous bodies supported by a fibrous skeletal framework. Storms and hurricanes are periodic events of high precipitation, winds, wave action, and flooding that can potentially cause damage to reef habitat, property, or human lives. Supporting services are ecological processes that indirectly benefit humans by maintaining a functional ecosystem for the production of other ecosystem goods and services. Surface and groundwater flow reflects the patterns of water movement across the landscape, including rivers, streams, underground water, or stormwater. Tunicates, or Waterborne discharges include direct and indirect discharges of pollutants into the aquatic environment, including chemicals, nutrients, sediment, and pathogens. A wetland is an area of land whose soil is saturated with moisture either permanently or seasonally.

CMap Description

Human activities that alter the landscape, including devegetation or soil disturbance, can alter surface and groundwater flow, causing freshwater discharge or runoff into coastal ecosystems, and altering salinity levels. Changes in salinity beyond the normal range of variability can affect the growth, reproduction, and survival of marine species. Salinity levels can be monitored and mapped to target sources of freshwater inputs or potentially vulnerable areas. Landuse management, agricultural practices, or mining practices can be implemented to minimize soil disturbance, impervious surfaces, and devegetation that alter surface and groundwater flow. Many of the same socio-economic sectors, such as transportation, civil engineering, and construction that create pressures on the reef also benefit from the goods and services, such as shoreline protection or recreational opportunities that contribute to the cultural identity of the local community.

Citations

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Citation Year Study Location Study Type Database Topics

Management Options

Management Option Description Sources Database Topics
Agriculture & Aquaculture: Sodic Soil Management In coastal agriculture it is important to manage and reduce accumulations of salts on the soil surface and down to the crop rooting depth. Saline seep often occurs in crop areas where the water table is very shallow. Irrigation management or drainage improvements may be necessary. Another option may be subsoiling, where internal soil drainage is restricted by layers of contrasting permeability and soil moisture levels are low enough to allow shattering and mixing of soil layers. Vegetative measures include planting deep rooted crops such as wheatgrass and alfalfa. Soil amendments can be used to treat sodium, displacing it with calcium depending on the specific chemistry of the soil. Though crop yield does not directly impact coral reefs, ground water restoration projects may change the raise the water table, making sodic soil management important. Natural Resources Conservation Service. 2011. National Handbook of Conservation Practices. U.S. Department of Agriculture.

Agriculture; Agriculture, Aquaculture, & Forestry Policies; Coastal Development; Ditching & Soil Disturbance; Food & Raw Materials; Landscape Conservation & Restoration; Salinity; Surface & Groundwater Flow; Water Depth & Sea Level
Monitor & Research: Water Quality Status and Trends Monitoring This activity produces long-term, comprehensive information on sanctuary-wide status and trends of water quality parameters. Parameters that should be measured include temperature, salinity, dissolved oxygen, turbidity, relative fluorescence, light attenuation, nutrients, chlorophyll, and alkaline phosphatase activity. NOAA Marine Sanctuary Program. 2007. Florida Keys National Marine Sanctuary revised management plan. National Ocean Service, Key West, FL.

Applied Chemicals; Atmospheric Emissions; Calcium Carbonate Deposition; Carbon Storage & Cycling; Chemical Variables; Climate; Climate Regulation; CO2; Discharges; Ecosystem Monitoring & Restoration; Environmental Monitoring & Restoration; Environmental Monitoring, Mapping, & Scientific Research; Light; Nutrient & Contaminant Processing; Nutrients; Ocean Acidity; Physical & Chemical Water Quality Criteria; Physical Variables; Regulating Services; Salinity; Sea Temperatures; Sediment; Supporting Services; Toxics; Waterborne Discharges
Monitor & Research: Research Historical Hydrology This activity involves a historical assessment of the hydrology of the surrounding water area around the sanctuary as it has affected water quality and biological communities within the sanctuary. It will clarify the role of freshwater inflows and water quality from local freshwater bodies. Also, this activity will examine the effects of structural modification and changes in quality, quantity, timing and distribution of freshwater releases from existing structures and will examine land-based practices affecting the water quality of runoff. NOAA Marine Sanctuary Program. 2007. Florida Keys National Marine Sanctuary revised management plan. National Ocean Service, Key West, FL.

Applied Chemicals; Chemical Variables; Coastal Development; Coastal Engineering; Dam Construction & Maintenance; Deforestation & Devegetation; Discharge Limitations; Discharges; Ditching & Soil Disturbance; Dredging, Draining, & Filling; Ecosystem Monitoring & Restoration; Environmental Monitoring & Restoration; Environmental Monitoring, Mapping, & Scientific Research; Hydrologic Management; Impervious Surfaces; Infrastructural Policies; Landscape Changes; Landuse Management; Physical Variables; Salinity; Seawater Flow; Shoreline Armoring; Stormwater Management; Surface & Groundwater Flow; Water; Water Depth & Sea Level; Water Transportation; Waterborne Discharges
Monitor & Research: Research Global Change This management option involves research to examine the effects of stresses associated with global change on the ecosystem. Stresses can include changes in temperature, hydrology, salinity, frequency and intensity of storms, turbidity, sea level change, and ultra violet and visible radiation. NOAA Marine Sanctuary Program. 2007. Florida Keys National Marine Sanctuary revised management plan. National Ocean Service, Key West, FL.

Atmospheric Emissions; Calcium Carbonate Deposition; Carbon Storage & Cycling; Chemical Variables; Climate; Climate Regulation; CO2; Discharges; Ecosystem Monitoring & Restoration; Environmental Monitoring & Restoration; Environmental Monitoring, Mapping, & Scientific Research; Greenhouse Gas Emissions; Nutrient & Contaminant Processing; Ocean Acidity; Physical & Chemical Water Quality Criteria; Physical Variables; Regulating Services; Salinity; Sea Temperatures; Seawater Flow; Shoreline Protection; Storms & Hurricanes; Supporting Services; Surface & Groundwater Flow; Water Depth & Sea Level
Waterway Management: Collaborate with Projects Changing Water-Flow Other organizations may be performing restorative freshwater projects (Everglades Restoration) or other flow altering projects (e.g. canals for small boats, agricultural irrigation etc) that affect the downstream marine management area (Florida Bay). Projects on the coast that involve hydrologic modifications (such as changing salinity) must be closely monitored in order to protect reef quality. Reefs are very sensitive systems and can only survive in a narrow salinity range. By taking an active role and monitoring freshwater flow projects, management staff can better ensure proper consideration of the impact on coastal marine environments. NOAA Marine Sanctuary Program. 2007. Florida Keys National Marine Sanctuary revised management plan. National Ocean Service, Key West, FL.

Comprehensive Everglades Restoration Plan. 2010. Comprehensive Everglades Restoration Plan: 2009 System Status Report.

Collaboration & Partnering; Dam Construction & Maintenance; Decision Support; Discharge Limitations; Discharges; Ditching & Soil Disturbance; Ecosystem Monitoring & Restoration; Hydrologic Management; Landscape Changes; Point Source Discharges; Public Administration; Salinity; Security & Public Administration Policies; Surface & Groundwater Flow; Water Transportation; Waterborne Discharges

Laws

Legal Citation Purpose of Law Management Organization Database Topics

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