Changes in climate

How does this impact wetlands?

There are many different wetland types but one thing they have in common is their dependence on the water cycle, though this varies in terms of specific water quantity, quality, and temperature needs.

Any changes to the water cycle through altered rainfall patterns (distribution, time of the year, quantity), extreme weather events and rising temperatures will affect the water cycle and therefore the hydrology of individual wetlands. This in turn will affect the wetland’s structure and functionality including carbon storage in wetlands. Climate impacts are likely to exacerbate changes in the water cycle.

Below are examples of how climate impacts are affecting or are likely to affect wetlands, including coastal areas and oceans:

• Increased flooding, especially flash flooding, and an associated increase in the level of pollutants entering wetlands as well as an increased rate and amount of erosion. This is expected to result in poorer water quality
• More severe droughts which will reduce the water available for wetlands thereby affecting health. These impacts will be compounded by existing pressures on water supply from infrastructure, agricultural, urban and industrial water use
• The drying out of soils in freshwater wetlands may result in oxidation of soil carbon and release of carbon dioxide
• Increased intensity of cyclones and storms which are likely to cause damage to coastal wetlands through increased flooding, damage to vegetation, changes to wetland structure, and reduced capacity for wetlands to repair between events
• Migration of mangroves and other estuarine wetlands inland in response to rising seas. Their capacity to do this will depend on suitable sites, topography, and local land use. In many coastal areas existing development and infrastructure are likely to be barriers to migrating systems leading to overall wetland loss. Saltwater intrusion and migration of brackish wetlands will impact freshwater wetlands
• Warmer seas which are likely to influence species composition and promote the intrusion of invasive species and increase dead zones, harmful algal blooms, and marine diseases
• Ocean acidification is the ongoing decrease in the pH of the Earth’s oceans resulting from long-term absorption of carbon dioxide from the atmosphere. It is estimated that roughly 30% of human-made carbon dioxide is absorbed by oceans. Marine calcifying organisms such as coral and some plankton are adversely affected by increasing acidity, with existing shells becoming vulnerable to dissolution.
• Impacts to migration and survival of species from pressures from climate change to environmental foundations, such as soil and soil quality, rainfall patterns and loss and/or fragmentation of habitat. Species that take longer to establish, such as trees, risk being unable to re-establish and the lack of canopy cover leading to further disruptions to surrounding species.

There are still many uncertainties regarding specific impacts on individual wetlands due to the sheer complexity of the climate system. However, the overall science around climate change and its likely impacts continues to grow. This increasing body of scientific information will help improve our understanding of how changes in the climate will impact Queensland’s wetlands and water systems.

Wetlands play a valuable role in supporting community efforts to adapt to a changing climate and respond to its impacts. There is increasing recognition of the role that wetlands play in supporting biodiversity, storing carbon and regulating greenhouse gas emission sources, being a refuge for wildlife during drought periods, and buffering our coastlines during extreme weather events.

Wetlands and climate change - strategies and frameworks

The Australian Government have released the National Climate Risk Assessment and the National Adaptation Plan, both of which underscore the significant risks and impacts that natural ecosystems, including wetlands, face due to climate change. These documents not only highlight the vulnerabilities of these critical environments but also emphasise their vital role in providing ecosystem services and sustaining biodiversity, reinforcing the need to protect and adapt them for the future. In terms of state frameworks, Queensland’s climate adaptation strategy provides a structure for ensuring an innovative and resilient Queensland that manages the risks and harnesses the opportunities of a changing climate.

Links to key climate change frameworks can be found below:

• Queensland Climate Adaptation Strategy (Q-CAS) 2017–2030 - QLD Treasury
• National Adaptation Plan - DCCEEW
• Biodiversity and Ecosystems Climate Adaptation Plan

Further information and resources

The Australian Government has developed a 'mini-portal ' to compile information and links about wetlands and climate change. The resources in the portal are broadly relevant to wetland managers and decision makers and include Ramsar Convention climate change resources, vulnerability and impacts, wetlands and the carbon cycle, adaptation and management, blue carbon, and case studies.

• Future Climate Change in Australia
• Bureau of Meteorology climate change and variability information
• Queensland Future Climate Dashboard
• Regrowth benefits tool
• CoastAdapt: Support for coastal decision makers adapting to climate change and sea-level rise in Australia
• Managing Ramsar wetlands under a changing climate
• Land Restoration Fund
• World Bank Assesses Impacts of Climate Change on Coastal Wetlands

Blue Carbon

Coastal wetlands, including mangroves, saltmarshes, and seagrasses, perform a critical ecosystem function by capturing and storing carbon, known as 'blue carbon.' These ecosystems act as natural carbon sinks, sequestering significant amounts of carbon dioxide and preventing its release back into the atmosphere. Protecting and restoring these ecosystems is recognised as a 'nature-based solution' to combat climate change, offering a sustainable approach to mitigating its impacts. Blue carbon is gaining traction in the carbon market, with its inclusion in carbon offset schemes providing an economic incentive for conservation and restoration efforts.

The Australian Government is exploring opportunities for blue carbon activities to be included in the Emissions Reduction Fund (ERF). The Australian Government is leading development of a blue carbon accounting methodology under the Government’s Carbon Farming Initiative with initial focus on developing a method to account for carbon sequestration resulting from the reintroduction of tidal flow to restore mangrove and tidal marsh ecosystems.

The Queensland Land Restoration Fund aims to expand carbon farming in the state by supporting land-sector projects that deliver additional environmental, social and economic co-benefits. The Blue Carbon in Queensland page explores how the Queensland Government is exploring Queensland's blue carbon potential.

• Restoring blue carbon ecosystems: a best practice guideline for hydrologic assessments
• Tidal restoration of blue carbon ecosystems method
• Blue Carbon Initiative
• Towards an Emissions Reduction Fund Method for Blue Carbon
• Australian Government initiatives for blue carbon
• Sustainable Wetlands Adaptation and Mitigation Program—climate presentations

Additional links

• Wetlands and the Carbon Cycle
• Technical review of opportunities for including blue carbon in the Australian Government’s Emissions Reduction Fund

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Last updated: 10 July 2026