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  • 5. Forest conservation
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  • 5.10 Habitat restoration and creation
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    Plan

    Plan détaillé Texte intégral 5.10.1 Restoration after wildfire 5.10.2 Restoration after agriculture 5.10.3 Manipulate habitat to increase planted tree survival during restoration 5.10.4 Restore forest community 5.10.5 Prevent/encourage leaf litter accumulation 5.10.6 Increase soil fertility

    What Works in Conservation 2018

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    Table des matières

    5.10 Habitat restoration and creation

    p. 313-321

    Texte intégral 5.10.1 Restoration after wildfire Trade-off between benefit and harms ● Thin trees after wildfire Unknown effectiveness (limited evidence) ● Remove burned trees Likely to be ineffective or harmful ● Sow tree seeds after wildfire No evidence found (no assessment) 5.10.2 Restoration after agriculture Unknown effectiveness (limited evidence) ● Restore wood pasture (e.g. introduce grazing) 5.10.3 Manipulate habitat to increase planted tree survival during restoration Unknown effectiveness (limited evidence) ● Apply herbicides after restoration planting ● Cover the ground using techniques other than plastic mats after restoration planting ● Cover the ground with plastic mats after restoration planting ● Use selective thinning after restoration planting 5.10.4 Restore forest community Unknown effectiveness (limited evidence) ● Build bird-perches to enhance natural seed dispersal ● Plant a mixture of tree species to enhance diversity ● Sow tree seeds ● Water plants to preserve dry tropical forest species No evidence found (no assessment) 5.10.5 Prevent/encourage leaf litter accumulation Unknown effectiveness (limited evidence) ● Remove or disturb leaf litter to enhance germination No evidence found (no assessment) 5.10.6 Increase soil fertility Likely to be beneficial ● Use vegetation removal together with mechanical disturbance to the soil Trade-off between benefit and harms ● Add organic matter ● Use fertilizer ● Use soil scarification or ploughing to enhance germination Unknown effectiveness (limited evidence) ● Add lime to the soil to increase fertility ● Use soil disturbance to enhance germination (excluding scarification or ploughing) Likely to be ineffective or harmful ● Enhance soil compaction

    Texte intégral

    5.10.1 Restoration after wildfire

    Image

    Trade-off between benefit and harms

    ● Thin trees after wildfire

    1Four of five replicated, controlled studies in Spain, Israel, Cananda and the USA found that thinning trees in burnt forest areas increased plant species richness, cover or survival of saplings. One study found thinning decreased plant biomass. One paired-site study in Canada found that logging after wildfire decreased species richness and diversity of mosses. Assessment: trade-offs between benefits and harms (effectiveness 50%; certainty 50%; harms 38%).

    2http://www.conservationevidence.com/actions/1234

    Unknown effectiveness (limited evidence)

    ● Remove burned trees

    3Two replicated, controlled studies in Israel and Spain found that removing burned trees increased total plant species richness or the cover and species richness of some plant species. Assessment: unknown effectiveness (effectiveness 60%; certainty 20%; harms 25%).

    4http://www.conservationevidence.com/actions/1237

    Likely to be ineffective or harmful

    ● Sow tree seeds after wildfire

    5Three studies, including one replicated, randomized, controlled study, in the USA found that sowing herbaceous plant seeds in burnt forest areas decreased the density of tree seedlings or the number and cover of native species. All three found no effect of seeding on total plant cover or species richness. Assessment: likely to be ineffective or harmful (effectiveness 0%; certainty 43%; harms 40%).

    6http://www.conservationevidence.com/actions/1236

    No evidence found (no assessment)

    7We have captured no evidence for the following interventions:

    8• Plant trees after wildfire

    5.10.2 Restoration after agriculture

    Image

    Unknown effectiveness (limited evidence)

    ● Restore wood pasture (e.g. introduce grazing)

    9One replicated paired study in Sweden found that partial harvesting in abandoned wood pastures increased tree seedling density, survival and growth. Assessment: unknown effectiveness (effectiveness 65%; certainty 25%; harms 0%).

    10http://www.conservationevidence.com/actions/1164

    5.10.3 Manipulate habitat to increase planted tree survival during restoration

    Image

    Unknown effectiveness (limited evidence)

    ● Apply herbicides after restoration planting

    11One replicated, randomized, controlled study in the USA found that controlling vegetation using herbicides after restoration planting decreased plant species richness and diversity. Assessment: unknown effectiveness (effectiveness 45%; certainty 25%; harms 40%).

    12http://www.conservationevidence.com/actions/1241

    ● Cover the ground using techniques other than plastic mats after restoration planting

    13One replicated, randomized, controlled study in the USA found that covering the ground with mulch after planting increased total plant cover. Assessment: unknown effectiveness (effectiveness 30%; certainty 15%; harms 10%).

    14http://www.conservationevidence.com/actions/1240

    ● Cover the ground with plastic mats after restoration planting

    15One replicated study in Canada found that covering the ground with plastic mats after restoration planting decreased the cover of herbecous plants and grasses. Assessment: unknown effectiveness (effectiveness 40%; certainty 20%; harms 0%).

    16http://www.conservationevidence.com/actions/1239

    ● Use selective thinning after restoration planting

    17One replicated, paired sites study in Canada found that selective thinning after restoration planting conifers increased the abundance of herbaceous species. Assessment: unknown effectiveness (effectiveness 43%; certainty 18%; harms 0%).

    18http://www.conservationevidence.com/actions/1238

    5.10.4 Restore forest community

    Image

    Unknown effectiveness (limited evidence)

    ● Build bird-perches to enhance natural seed dispersal

    19One replicated, randomized, controlled, before-and-after study in Brazil found that sowing tree seeds increased the density and species richness of new trees. Assessment: unknown effectiveness (effectiveness 50%; certainty 13%; harms 0%).

    20http://www.conservationevidence.com/actions/1245

    ● Plant a mixture of tree species to enhance diversity

    21One replicated, randomized, controlled study in Brazil found that planting various tree species increased species richness, but had no effect on the density of new trees. One replicated, controlled study in Greece found that planting native tree species increased total plant species richness, diversity and cover. Assessment: unknown effectiveness (effectiveness 50%; certainty 28%; harms 0%).

    22http://www.conservationevidence.com/actions/1243

    ● Sow tree seeds

    23One replicated, randomized, controlled, before-and-after study in Brazil found that sowing tree seeds increased the density and species richness of new trees. Assessment: unknown effectiveness (effectiveness 60%; certainty 13%; harms 0%).

    24http://www.conservationevidence.com/actions/1244

    ● Water plants to preserve dry tropical forest species

    25One replicated, controlled study in Hawaii found that watering plants increased the abundance and biomass of forest plants. Assessment: unknown effectiveness (effectiveness 65%; certainty 18%; harms 0%).

    26http://www.conservationevidence.com/actions/1242

    No evidence found (no assessment)

    27We have captured no evidence for the following interventions:

    • Restore woodland herbaceous plants using transplants and nursery plugs
    • Use rotational grazing to restore oak savannas

    5.10.5 Prevent/encourage leaf litter accumulation

    Image

    Unknown effectiveness (limited evidence)

    ● Remove or disturb leaf litter to enhance germination

    28One of two replicated, controlled studies in Poland and Costa Rica found that removing leaf litter increased understory plant species richness. The two studies found that removal decreased understory plant cover or the density of new tree seedlings. Assessment: unknown effectiveness (effectiveness 40%; certainty 25%; harms 23%).

    29http://www.conservationevidence.com/actions/1246

    No evidence found (no assessment)

    30We have captured no evidence for the following interventions:

    31• Encourage leaf litter development in new planting

    5.10.6 Increase soil fertility

    Image

    Likely to be beneficial

    ● Use vegetation removal together with mechanical disturbance to the soil

    32Three studies, including one replicated, randomized, controlled study, in Portugal and France found that vegetation removal together with mechanical disturbance of the soil increased the cover or diversity of understory plants, or density of young trees. One of the studies found it decreased understory shrub cover. Assessment: Likely to be beneficial (effectiveness 61%; certainty 40%; harms 15%).

    33http://www.conservationevidence.com/actions/1274

    Trade-off between benefit and harms

    ● Add organic matter

    34One of two studies, including one replicated, randomized, controlled study, in Brazil and Costa Rica found that adding leaf litter increased species richness of young trees. One found it decreased young tree density in artificial forest gaps and both found no effect on the density of tree regenerations under intact forest canopy. One of two replicated, controlled study in Portugal and the USA found that adding plant material increased total plant cover. One found mixed effects on cover depending on plant group. Assessment: trade-offs between benefits and harms (effectiveness 45%; certainty 43%; harms 28%).

    35http://www.conservationevidence.com/actions/1250

    ● Use fertilizer

    36Six of eight studies, including five replicated, randomized, controlled, in Europe, Brazil, Australia and the USA found that applying fertilizer increased total plant cover, understory plant biomass, size of young trees, biomass of grasses or cover of artificially seeded plant species. Five of the studies found no effect on plant biomass, cover, seedling abundance, tree growth or tree seedling diversity. Assessment: trade-offs between benefits and harms (effectiveness 55%; certainty 65%; harms 25%).

    37http://www.conservationevidence.com/actions/1248

    ● Use soil scarification or ploughing to enhance germination

    38Two studies, including one replicated, randomized, controlled study, in Portugal and the USA found that ploughing increased the cover or diversity of understory plants. Two of five studies, including two replicated, randomized, controlled, in Canada, Brazil, Ethiopia and Sweden found that ploughing increased the density of young trees. One found a decrease in density and two found mixed effects depending on tree species. One replicated, before-and-after trial in Finland found that ploughing decreased the cover of plants living on wood surface. One replicated, controlled study in the USA found that ploughing did not decrease the spreading distance and density of invasive grass seedlings. Assessment: unknown effectiveness (effectiveness 60%; certainty 50%; harms 25%).

    39http://www.conservationevidence.com/actions/1251

    Unknown effectiveness (limited evidence)

    ● Add lime to the soil to increase fertility

    40One replicated, randomized controlled study in the USA found that adding lime increased vegetation cover. Assessment: unknown effectiveness (effectiveness 80%; certainty 18%; harms 0%).

    41http://www.conservationevidence.com/actions/1249

    ● Use soil disturbance to enhance germination (excluding scarification or ploughing)

    42Two replicated, controlled studies in Canada and Finland found that disturbance of the forest floor decreased understory vegetation cover. Assessment: unknown effectiveness (effectiveness 30%; certainty 35%; harms 40%).

    43http://www.conservationevidence.com/actions/1252

    Likely to be ineffective or harmful

    ● Enhance soil compaction

    44Two of three studies, including two replicated, randomized, controlled studies in Canada and the USA found that soil compaction increased understory plant cover and density. Two found it decreased tree regeneration height or density and understory plant species richness. Assessment: likely to be ineffective or harmful (effectiveness 28%; certainty 40%; harms 45%).

    45http://www.conservationevidence.com/actions/1253

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    Table des matières

    Creative Commons - Attribution 4.0 International - CC BY 4.0

    Le texte seul est utilisable sous licence Creative Commons - Attribution 4.0 International - CC BY 4.0. Les autres éléments (illustrations, fichiers annexes importés) sont « Tous droits réservés », sauf mention contraire.

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    Sutherland, W. J., Dicks, L. V., Ockendon, N., Petrovan, S. O., & Smith, R. K. (éds.). (2018). 5.10 Habitat restoration and creation. In What Works in Conservation 2018 (1‑). Open Book Publishers. https://books.openedition.org/obp/6527
    Sutherland, William J., Lynn V. Dicks, Nancy Ockendon, Silviu O. Petrovan, et Rebecca K. Smith, éd. « 5.10 Habitat Restoration and Creation ». In What Works in Conservation 2018. Cambridge: Open Book Publishers, 2018. https://books.openedition.org/obp/6527.
    Sutherland, William J., et al., éditeurs. « 5.10 Habitat Restoration and Creation ». What Works in Conservation 2018, Open Book Publishers, 2018, https://books.openedition.org/obp/6527.

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    Sutherland, W. J., Dicks, L. V., Ockendon, N., Petrovan, S. O., & Smith, R. K. (éds.). (2018). What Works in Conservation 2018 (1‑). Open Book Publishers. https://books.openedition.org/obp/6257
    Sutherland, William J., Lynn V. Dicks, Nancy Ockendon, Silviu O. Petrovan, et Rebecca K. Smith, éd. What Works in Conservation 2018. Cambridge: Open Book Publishers, 2018. https://books.openedition.org/obp/6257.
    Sutherland, William J., et al., éditeurs. What Works in Conservation 2018. Open Book Publishers, 2018, https://books.openedition.org/obp/6257.
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