Energy crops increase biodiversity
It is suggested that energy crops increase biodiversity in particular when managed as short rotation coppice. Furthermore, renewable energy can be produced. According to several studies, short rotation coppice (SRC) can reinforce functional biodiversity values. The study was conducted by researchers at Ghent University and The Flemish Institute for Technological Research (Belgium).
This is a complementary post to “5 reasons to cultivate renewable biomass” focused on how energy crops could improve food sustainability and land use by implementing agricultural rotations, avoiding monocultures, not plowing every year but giving more relevance to grasslands and forestry, then promoting increments in biodiversity with perennial species. Now this new study has found clear evidence that SRC as energy crops (willow in this case) can be extremely valuable to improve current land use and fauna in Northern Europe.
Biodiversity and Short Rotation Coppice as energy crops
Researchers compared communities of vascular plants and arthropods in ten Short Rotation Coppice (SRC) used as energy crops –maize pairs, to (1) quantify the difference in diversity and composition between these two alternative land-use types and (2) to assess the potential of SRC plantations to increase functional biodiversity values in agricultural landscapes.
In each SRC energy crop plantation and maize field, the vegetation was surveyed and arthropods were sampled by applying pitfall and pan trapping.
The composition of the vegetation and the epigeic inhabiting arthropod communities strongly differed between the crop types. This differentiation was mainly due to true species turnover and only to a lesser extent to the occurrence of nested subsets.
Perennials: Willow trees producing biomass for renewable energy are harvested. Researchers found SRC consistently increased arthropod activity and densities.
Short rotation coppice increased densities!
On average, the total cover of the energy crops vegetation was 10 times higher in the SRC plantations and taxonomic and trait diversity were also consistently higher in SRC. Arthropod activity densities were significantly higher, sometimes almost double, in SRC plantations. Effective species numbers in SRC were only retrieved for Hymenoptera and Coleoptera. Regarding functional groups, the activity densities of omnivores, detritivores, mycophages, phytophages, and parasitoids were significantly higher in SRC. While activity densities of predators were not different among the crop types, their effective species number was higher in SRC, indicating a more evenly distributed and diverse predator community.
To conclude, authors have shown that energy crops as SRC can significantly increase vegetation and arthropod abundance and/or diversity in agricultural landscapes when replacing annual biomass crops, such as maize. Three of the four most dominant taxonomic groups showed a higher activity density in SRC, whereas the effect of crop type on the effective species numbers was more variable, with even slightly higher numbers for Diptera in maize. This suggests that SRC plantations, at least those located in simple landscapes, mainly increased the activity density of arthropods and only to a lesser extent the arthropod diversity at the field scale. Nevertheless, in line with the results for the vegetation, the dissimilarity in arthropod communities was mainly the result of species turnover. Hence, SRC plantations provide additional habitats compared to maize, increasing the arthropod gamma diversity at the landscape scale.
These findings were consistent with many others on energy crops and previous studies on willow as a better habitat for fauna.
Below you will find other articles backing bioenergy and biodiversity:
- Biodiversity in short-rotation coppice
- Is energy cropping in Europe compatible with biodiversity? – Opportunities and threats to biodiversity from land-based production of biomass for bioenergy purposes
- Tropical Forest Biodiversity to Provide Food, Health and Energy Solution of the Rapid Growth of Modern Society
- Biofuels and Biodiversity, Wildlife Habitat Restoration
- Stakeholder engagement in scenario development process – Bioenergy production and biodiversity conservation in eastern Finland
- Woodfuel harvesting and biodiversity conservation in temperate forests: Effects of logging residue characteristics on saproxylic beetle assemblages.
- Bioenergy or biodiversity? Woody debris structures and maintenance of red-backed voles on clearcuts
- Biodiversity response to intensive biomass production from forest thinning in North American forests – A meta-analysis
- Priority order in using biomass resources – Energy systems analyses of future scenarios for Denmark
- Dependency of global primary bioenergy crop potentials in 2050 on food systems, yields, biodiversity conservation and political stability
- Biofuel harvests, coarse woody debris, and biodiversity – A meta-analysis
- Bioenergy as a biodiversity management tool and the potential of a mixed species feedstock for bioenergy production in Wales
- Whole-tree harvesting with stump removal versus stem-only harvesting in peatlands when water quality, biodiversity conservation and climate change mitigation matter
- The infuence of rotation length on the biomass production and diversity of ground beetles (Carabidae) in poplar short rotation coppice
- Comparing energy balances, greenhouse gas balances and biodiversity impacts of contrasting farming systems with alternative land uses
- The role of marginal agricultural land-based mulberry planting in biomass energy production
- Biomass yield, energy values, and chemical composition of hybrid poplars in short rotation woody crop production and native perennial grasses in Minnesota, USA
- Biomass yield and energy balance of a short-rotation poplar coppice with multiple clones on degraded land during 16 years
- Yield in 8 year-old hybrid poplar plantations on abandoned farmland along climatic and soil fertility gradients
- Can hybrid poplar plantations accelerate the restoration of forest understory attributes on abandoned felds?
- Towards practices favourable to plant diversity in hybrid poplar plantations
- Invertebrate populations in miscanthus (Miscanthus×giganteus) and reed canary-grass (Phalaris arundinacea) felds
- The economical and environmental performance of miscanthus and switchgrass production and supply chains in a European setting
- Ground fora, small mammal and bird species diversity in miscanthus (Miscanthus×giganteus) and reed canary-grass (Phalaris arundinacea) felds
- Effects of bioenergy crop cultivation on earthworm communities—A comparative study of perennial (Miscanthus) and annual crops with consideration of graded land-use intensity
- Responses of soil macroinvertebrate communities to Miscanthus cropping in different trace metal contaminated soils
- Changing from row crops to perennial energy grasses can sequester0.49 to 0.75 Mg C ha−1, as well as reducing erosion risk dramatically.