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Farming for Biodiversity

Tweed Shire Council

Murwillumbah, Australie
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An Overview Of Our Solution

The Tweed Caldera is one of the most biologically diverse places in Australia. A large area of the ancient volcanic caldera is World Heritage. The Tweed floodplain has been predominantly cleared for agriculture. Historical farming methods including draining of wetlands and vegetation removal have had significant impacts on local ecosystems and species, some of which are found nowhere else on earth. Endangered floodplain communities including lowland rainforest and saltmarsh persist as small remnants within the farming landscape. By working collaboratively with the local cane industry and the community, Tweed Shire Council, the local government authority has revegetated and restored over 30 km of drainage lines & creeks within the cane farming districts resulting in improvements in water quality, fish habitat & plant species diversity.
Who is this solution impacting?
Community Type
Rural
Rural
Additional Information
  • Population Impacted:
  • Continent: Oceania
General Information

Organization type

Gouvernementale
Ecosystem (select all that apply)
Oceans
Oceans/Coasts

Population impacted

100,000+
Challenge

Size of agricultural area

6,700ha

Production quantity

550,000 tonnes of cane, 65,000 tonnes of sugar

People employed

200+
Solution

Describe your solution

The solution to the problem required collaboration between government, industry & communities & was the result of using biodiversity to restore the functionality of the floodplain environment. Without deep-rooted vegetation on the banks slumping and erosion was a major issue, as well as sediment runoff entering waterways & excavations exposing acid sulfate soils leading to significant impacts on water quality and aquatic life downstream. In response, project partners stabilized and revegetated major channels and creeks with locally occurring native species. To date over 30 km of drains have been revegetated with over 75k plants and 30 farmers involved. In combination with the revegetation works, floodgates have been modified to enable intrusion of saline water into drains to improve fish passage, manage aquatic weeds & buffer the acidity. Farmers & the cane industry witnessed the benefits of revegetating their drainage canals and modifying floodgates leading to widespread adoption amongst other farmers. Less time and resources were invested in drain maintenance, fewer chemicals used, and the marked improvements in water quality and biodiversity on-farm was enough to attract other farmers to the innovative methods. The monumental shift in drain management practices has only been achievable through close working relationships and being able to demonstrate, at a local level, the production benefits of increasing biodiversity in the cane farming system.
Implementation

Describe your implementation

The project initially involved desktop analysis & ground truthing with landholders and the cane industry to identify the most problematic drainage lines. The next stage involved engagement & education to convince landholders that there are more practical & less resource-intensive ways of managing drainage channels that are economically beneficial & environmentally sustainable. Once suitable sites were located & landholders were committed to participating, works plans developed outlined roles & responsibilities of landholders, local government and contractors. Often the most successful restorations were those that involve significant in-kind contributions and involvement of the landholder. The next stage involved identifying suitable native species that thrive locally and sourcing these from local native nurseries. Typically fast growing groundcovers with fibrous matting roots are used on the southern drain bank to prevent slumping and to capture nutrients and soil in runoff. Trees were planted along the northern bank to provide greater bank stability, uptake of nutrients in runoff and shade which inhibits the growth of aquatic weeds whilst improving fish habitat. Skilled bush regenerators were then used to maintain the site for one to two years after planting to ensure the ecosystem reestablishes, whilst passing on specialist skills to landholders at the same time so they may continue best practice weed control into the future. Field days and workshops were also held to enable the transfer of knowledge to other farmers and to build capacity amongst the industry.The key to success has been the collaboration between all parties as well as a reliable source of funding to enable on-ground works. Major obstacles have been cultural ones where farmers are unwilling to participate or cannot see the benefits of changing practices. These are overcome by utilising industry champions to convey key messages and to demonstrate the benefits by promoting the works on other farms.

External connections

Key partners included the local sugar industry, cane farmers, state government agencies responsible for agriculture including the Department of Primary Industries & Fisheries and Northern Rivers Local Land Services (formerly Northern Rivers Catchment Management Authority), community conservation groups including Landcare, commercial and recreational fishers, soil scientists and floodplain ecologists, native nurseries, specialist bush regenerators and local government personnel. The project has brought cane farmers, fishers, the tourism sector and other community members together in what has traditionally been a conflicting relationship with cane farmers being blamed for poor water quality, loss of fish stocks and impacts on recreational use of downstream waterways. The project has showcased the environmental sustainability efforts of the local cane industry, educated the community about agricultural practices and empowered cane farmers to adopt more sustainable practices that benefit biodiversity and farm productivity.
Results

What is the environmental or ecological challenge you are targeting with your solution?

Last century, the government offered incentives to encourage farmers to undertake drainage works to transform the Tweed floodplain into agricultural land. A drainage network was created to convey floodwater, existing natural creeks where modified, wetlands drained & native vegetation removed. The biodiversity of the floodplain was decimated by these developments. Riparian areas were invaded by exotic weeds & banks became susceptible to erosion and slumping leading to channel infilling. Large trees were cut and floodgates installed drastically altering wetland hydrology & degrading fish habitat. The need for ongoing drain maintenance led to routine use of chemical herbicides to control weeds & heavy machinery to remove sediment. Acid sulfate soils were exposed during drain construction & maintenance works released acidity & heavy metals into waterways killing fish. Until recently, the ecological services & production benefits of biodiverse drainage channels were not realized.

Describe the context in which you are operating

Tweed Shire is a local government area north of Sydney and south of Brisbane. It's bordered by the Mount Warning volcanic caldera. Over 92,000 people live in the Shire & the population is expected to reach 128,000 by 2031. The rapid population growth is the result of people moving to enjoy the lifestyle, favorable climate and natural environment. This puts further pressure on the natural environment and its rich biodiversity. Tweed Shire is recognized as one of the most biodiverse areas in Australia with over 1,500 species of flowering plants & over 60 species of mammals and more than 270 species of birds. Rural land is used largely for agriculture, particularly sugar cane growing, beef and dairy farming, and small cropping. Agriculture makes only a small contribution to the economy (approximately 2% of GDP $A58m/year) but occupies over 2/3 of the landscape. Consequently, agriculture is highly visible and has a significant impact on the natural environment and scenic amenity.

How did you impact natural resource use and greenhouse gas emissions?

Biodiversity has been improved by planting over 75,000 native plants over more than 30km of drains in a floodplain farming environment largely denuded of native vegetation. Floodgates have been modified to enable fish passage and saline intrusion to buffer acid sulfate soils leading to significant improvements in water quality and aquatic biodiversity. Increased aquatic life on farms has benefited rare and threatened bird species such as the jabiru, and migratory birds. The project has improved water quality in the receiving estuarine environment with no major fish kills since project commencement and a thriving commercial and recreational fishing industry downstream. The works have also improved connectivity between remnant patches of lowland rainforest and sclerophyll floodplain forests. Native rainforest trees are establishing in riparian areas on cane farms providing habitat for owls that prey on rodents and other pests in the production system.

Language(s)

English

Social/Community

The local community highly values the natural environment and has reaped the benefits of the collaborative efforts of industry and government to address environmental challenges in the farming system. Residents and the significant number of tourist visitors to the Tweed are benefiting from improved water quality when they use downstream areas for recreation. Employment in the tourism industry is supported by a cleaner river, good recreational fishing opportunities & scenic values delivered

Water

There have been no major fish kills since the project commenced in 2006 suggesting the project has contributed significantly to the management of acid sulfate soils. Increased diversity of aquatic fauna in sugarcane farm drainage systems, as measured by the Fisheries Department, is due to improved water quality.

Food Security/Nutrition

More sustainable production of sugar in the Tweed which is used in numerous food products worldwide. The project has helped to secure the ongoing use of productive agricultural land that contributes to food security now and in the future. Improved water quality is enabling the sustainable use of the downstream estuary for commercial fishing purposes. The project has reduced costs in maintaining farm drains, chemicals, and saved farmers time leading to more sustainable farming.

Economic/Sustainable Development

The sugar industry makes an important contribution to the local economy providing employment & generating flow on effects for business. The project has strengthened the sustainability credentials of the industry. Improved farm productivity and sustainability encourages younger farmers to stay in the area and continue primary production. Improvements in water quality have benefited the local fishing and oyster industries and tourism sectors.

Climate

The project has improved carbon storage in the farming system and created new habitat and linkages that enable the movement of species in response to climate change.

Sustainability

The project initially required funding to carry out restoration works. Costs associated with restoring a functional riparian ecosystem hare less than the cost of ongoing weed control and drain excavations. A price cannot be put on the environmental benefits and ecosystem services provided by restoring riparian ecosystems. Over time these are expected to outweigh the cost of conventional drain management. The project showed the benefits of investing in riparian restoration as a means of reducing farm maintenance costs to the extent that little or no funding is required to incentivize further work of this kind. Partnerships with universities enable research projects at little or no cost.

Return on investment

The full cost of riparian restoration in sugar cane production areas ranges from $5,000 - $10,000 per kilometre of drain or creek bank depending on the particulars of the site and the amount of landholder contribution. Landholders can make valuable contributions in the form of labour and machinery to reshape drain banks and preparing sites prior to replanting. The investment is typically a one off with no additional financial investment required. The return on investment is substantial as landholders no longer need to dedicate time and money on drain maintenance whilst considerable water quality improvements and biodiversity outcomes are achieved at the same time.

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Replication and Scale

How could we successfully replicate this solution elsewhere?

This project could be successfully replicated world-wide wherever there is a commitment from government and industry to work collaboratively to achieve mutually beneficial outcomes for farmers and the wider community. The project has made cane farming more economically viable and enhanced the natural environment. Critical to the success was funding from government agencies such as the North Coast Local Land Services and Tweed Shire Council. The economic benefits of investing in biodiversity conservation on sugar cane farms has been realised to the point where farmers are much more willing to financially support projects of this kind. In-kind contributions from landholders was critical for project success, enabling farmers to take ownership and promote the benefits to the wider industry. Training in native plant identification and best practice weed management techniques for biodiversity was also important. As the value of the approach was realised it became widely adopted.
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