Category: Goal: Prevent erosion

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Companion Planting

Similar names: trap cropping, intercropping, plant association 

Companion planting is an agricultural technique wherein various crops are grown close together to enhance growth, control pests, optimise space and boost productivity. While companion planting is associated with small-scale gardening, the general principles can be broadly integrated into large-scale operations. This approach is considered a low-input and ecologically mindful method for pest management. Rooted in traditional ecological knowledge, this technique focuses on creating mutually beneficial relationships between plants. One of the most common examples of companion planting is the Three Sisters, which is a traditional Native American growing practice that includes corn, beans and squash. Each plant serves a specific role that benefits the other crops in various ways.

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Cover Cropping

Similar names: green manure, living mulch, soil-building crops, catch crops

Cover cropping has been used across the world throughout history. However, as the rise of synthetic herbicides and fertilizers became more popular, the use of cover crops declined. In recent years, concerns over soil health and the desire to reduce chemical inputs has sparked renewed interest in cover crop techniques. Unlike cash crops, cover crops are grown for environmental benefits rather than for profit. Cover crops are typically grown in the off-season following the harvest of a main cash crop. They are typically mowed, incorporated into the soil, or used as mulch. Cover crops offer a wide array of benefits as they help to improve soil health, control erosion, suppress weeds, improve yields, and attract pollinators. There are a large variety of cover crops to choose from, however the choice of cover crop depends on the goal of the grower.

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Citizen Divers

Similar names: Citizen science, community science, community-based participatory research, crowdsourced research

Citizen divers represent a form of citizen science that allows the general public, particularly recreational divers, to contribute to scientific research, often in collaboration with scientists and researchers. Divers participate in activities such as environmental monitoring, data collection, and analysis of the marine ecosystem. Given the challenge of accessing underwater ecosystems, citizen divers are represented less compared to other forms of citizen science. 

Utilising the time and skills of local communities in scientific research has been a powerful asset in scientific research worldwide. This approach not only has the potential to contribute to scientific knowledge, but also creates an opportunity to educate and empower individuals, sparking curiosity and inspiring future generations along the way. Beyond the generation of knowledge, one of the key outcomes of citizen divers is its ability to bridge the gap between science and society. This approach to research fosters a deeper connection between communities and their local marine ecosystems, thus encouraging marine stewardship through hands-on learning.



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Dune Planting

Synonyms: Dune fixation, wickerworks

Dune grass planting is a dune restoration technique that reinforces dune stability by establishing vegetation capable of trapping, anchoring, and accumulating sand. This process is effective in both coastal and inland dunes, where wind erosion, overgrazing and sand mobility pose threats to ecosystem stability.

In coastal settings, grasses like marram grass (Ammophila arenaria) and lyme grass (Leymus arenarius) are essential for initiating and maintaining dune growth. Marram grass, in particular, grows vigorously in sandy environments, extending its roots both horizontally and vertically as sand accumulates. This growth pattern allows the grasses to trap sand and stabilize dune surfaces, reducing wind speeds at the ground level and encouraging sand to settle. By reducing the velocity of surface winds, the grasses create a self-reinforcing cycle of sand accumulation and root expansion. This process promotes the formation of “yellow dunes” further inland, while more resilient species like sand couchgrass (Elymus farctus) stabilize the vulnerable “foredune” zone nearest to the shoreline, where occasional seawater inundation occurs.

In arid, inland dune regions where desertification is a concern, planting drought-resistant vegetation such as Leptadenia pyrotechnica and Calligonum comosum serves a similar function. These species prevent sand from moving with the wind by creating dense root systems that hold soil in place. The combined horizontal and vertical growth of these plants enhances soil retention, improves the dune’s physical stability, and reduces the likelihood of sand encroachment on nearby agricultural or pastoral lands. By acting as windbreaks and anchoring loose sand, these plants encourage dune formation and mitigate the physical impacts of wind erosion.

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Dune Thatching

Covering exposed dune faces – or blowouts – with waste cuttings from forestry or other low-cost materials is a technique called dune thatching. It is used to stabilize sand, reduce trampling, and protect vegetation. When locally sourced, thatching materials are inexpensive, and the process requires no machinery or skilled labor. This method is typically combined with dune grass planting to further enhance dune stability. 

Properly applied thatch can aid dune recovery and provide resistance to erosion, although it cannot fully protect areas where waves frequently cause damage. The thatch slows surface wind speeds, encouraging sand to settle and accumulate. The effectiveness of this approach depends on the presence of blown sand, frequency of wave impact, presence of vegetation, and level of maintenance. Planting dune grasses after thatching can further improve dune recovery and stability over time. 

In this intervention we distinguish two types dune thatching:

  • Dune thatching with old (Christmas) trees:  Creating a natural barrier by digging in old (christmas trees) in a line parallel to the shoreline. This barrier promotes the entrapment of sand and in combination with dune grass planting this can stabilize dunes and promote formation of new dunes.

  • Dune thatching with millet stalk palisades: Creating physical sand barriers from dried plant palisades can be arranged in various ways depending on the level of sand dune destabilization. In heavily encroached areas, millet stalk palisades arranged in square grids can act as considerable wind catchment zones and prerequisite for revegetation. After two years, these palisades tend to fall apart and decompose and restored vegetation takes over the dune fixation function.
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Dune Fencing

Building semi-permeable fences along the seaward or the prevailing wind side of dunes encourages windblown sand to accumulate, reduces trampling, and protects both existing and newly planted vegetation. Various fencing materials can effectively enhance natural dune recovery. This type of fencing is often combined with other management practices to promote dune stabilization and minimize environmental impact.

The use of dune fencing for wind erosion control and dune stabilization has a long history. Its success relies on factors such as the fence’s void-to-solid ratio, the availability of wind-driven sand, the frequency of wave activity at the fence line, and the amount of vegetation present to help stabilize accumulated sand. Combining dune fencing with other strategies, such as Dune Planting or Dune Thatching, can help establish new foredunes and further enhance stability.

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Sediment Tubes

Encouraging natural colonization of boat-damaged seagrass beds, this technique involves filling fabric tubes with sediment and seagrass seeds to speed up recovery, and placing them along damaged scars from anchors and propellers to ensure reconnection of the seagrass meadow.  

By returning these damaged segments to the appropriate elevation, the intervention prevents further erosion and scouring by water currents as well as protects peripheral rhizomes from excessive sunlight exposure.

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Hessian Mattresses

Hessian mattresses are an innovative and eco-friendly solution for seagrass restoration projects. Made from biodegradable jute material, these mats provide a sediment-free, low-cost method for transplanting seagrass seedlings to degraded coastal areas, including sites impacted by mooring scars. By anchoring seagrass seedlings within the hessian fabric, the mattresses help stabilize the plants, protect them from being swept away by currents, and encourage healthy root establishment. Over time, the hessian material naturally decomposes, leaving behind a flourishing seagrass bed that restores marine biodiversity, improves water quality, and provides essential habitats for marine life.

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Riparian Buffer Zones

Similar names: Conservation buffers, Stream corridor bank enhancement, Riparian buffer strips and hedges, Terrestrial buffers, Riparian buffer systems

Riparian buffer zones are the interface between land and a river, stream or creek often characterised by riparian woodlands, forests and riparian strips. The plant habitats and natural communities along the river banks are better known as riparian vegetation and they are characterised by hydrophilic plants, bushy vegetation and forest systems. The presence of riparian buffer zones is crucial due to their role as natural biofilters and their protection of aquatic environments from excessive sedimentation, polluted surface runoff and erosion. Furthermore, they provide shelter, shade and food for many aquatic species.

Often the riparian zones are damaged by various anthropogenic activities such as agriculture, construction and silviculture. In this case, biological restoration can take place, with the most common practices being erosion control and revegetation. Furthermore, in some places riparian zones are fully lacking and reintroducing them could bring plenty of benefits to the local ecosystems. Because of the great biological function these systems have in supporting a diversity of species and landscapes, they are in some places subject to national protection mechanisms.

Initiating and restoring riparian buffers is crucial for the healthy functioning of riparian ecosystems. The vegetation around the banks of the river slows the flow of water which controls the power of the river and the destruction that could occur downstream. When near agricultural land, the riparian buffers filter various pollutants from agricultural runoffs, enhancing water quality via biofiltration. 

Disclaimer: Check whether Riparian Buffer Zones are subject to national protection in your area, as this could help with their protection and restoration.

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Muvuca Direct Seeding

Similar names: Seed-based land restoration, Direct sowing

Muvuca direct seeding is a nature restoration method, where a mix of seeds from dozens of native species at different successional stages are planted simultaneously into the ground. The method mimics natural regeneration mechanisms such as seed soil banks and seed rain. Better known conventional practice is direct seeding’s popular counterpart – transplanting, which is a technique of moving plants from one location to another, usually to preserve the optimal condition of the seedlings. Despite providing more control over the plant’s growth, transplanting doesn’t allow for a high variety of plant seeds to grow simultaneously.

The Muvuca system uses a high diversity of species and ensures longer-term operational efficiency, which in return enables mechanised restoration with reduced planting, low maintenance in terms of time and reduced costs. Planting can be done either manually or mechanised (using machinery such as tractors), which enables the scalability of the intervention. Furthermore, the grown plants through Muvuca become more robust and resistant to various weather conditions, which results in stronger root systems and overall healthier vegetation. Overall, Muvuca direct seeding can contribute to the scaling up of restoration efforts, while reducing costs and increasing the species diversity. Meanwhile, the demand for native species enables the promotion of conservation and well-being.