Collected Evidence: Collected Evidence: Conserve old buildings or structures as nesting sites for bees We found no evidence for the effects of conserving old buildings and structures suitable for nesting wild bees. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F4https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F4Tue, 18 May 2010 10:34:38 +0100Collected Evidence: Collected Evidence: Protect brownfield sites We have captured no evidence for the effects of interventions to protect brownfield sites from insensitive re-development. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.    Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3Tue, 18 May 2010 14:57:41 +0100Collected Evidence: Collected Evidence: Protect existing natural or semi-natural habitat to prevent conversion to agriculture We have captured no evidence for the effects of protecting areas of natural or semi-natural habitat on bee populations or communities. 'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.    Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F5https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F5Thu, 20 May 2010 19:58:47 +0100Collected Evidence: Collected Evidence: Use infrastructure to reduce vehicle collision risk along roads One study evaluated the effects on butterflies and moths of using infrastructure to reduce vehicle collision risk along roads. This study was in the USA. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (1 STUDY) Behaviour change (1 study): One controlled study in the USA reported that “altitude guide” netting, and poles topped with bright colours or flowers (attractive features), did not alter the behaviour of Oregon silverspot around roads. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3853https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3853Tue, 05 Jul 2022 11:41:12 +0100Collected Evidence: Collected Evidence: Retain or plant trees to act as windbreaks One study evaluated the effects on butterflies and moths of retaining or planting trees to act as windbreaks. This study was in Sweden. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (1 STUDY) Use (1 study): One site comparison study in Sweden reported that sheltered grassland strips were more likely to be used by one of four butterfly species than strips providing nectar resources or no resources. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3861https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3861Tue, 05 Jul 2022 15:39:41 +0100Collected Evidence: Collected Evidence: Create or retain deadwood in forest management One study evaluated the effects on butterflies and moths of creating or retaining deadwood in forest management. This study was in Sweden. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Sweden found that sites where deadwood had been left for many years had a higher abundance of Scardia boletella moths than conventionally managed sites in one of two regions, but the occurrence of Archinemapogon yildizae moths was similar across all sites. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3873https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3873Mon, 18 Jul 2022 16:00:36 +0100Collected Evidence: Collected Evidence: Re-plant native trees in logged areas One study evaluated the effects on butterflies and moths of replanting native trees in logged areas. The study was in Ghana. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One site comparison study in Ghana found that nine years after an area was replanted with native trees after logging it had similar species richness but lower diversity for two of three metrics compared to naturally regenerating secondary forest. POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3874https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3874Mon, 18 Jul 2022 16:03:37 +0100Collected Evidence: Collected Evidence: Remove, control or exclude invertebrate herbivores One study evaluated the effects on butterflies and moths of removing, controlling or excluding invertebrate herbivores. The study was in the UK. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in the UK found that at sites fenced to exclude grazing animals there was a higher density of pearl-bordered fritillary butterflies than at unfenced sites. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3885https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3885Tue, 26 Jul 2022 18:24:30 +0100Collected Evidence: Collected Evidence: Provide buffer strips to reduce pesticide and nutrient run-off into margins, waterways and ponds One study evaluated the effects on butterflies and moths of providing buffer strips to reduce pesticide and nutrient run-off into margins, waterways and ponds. This study was in the UK. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, paired, site comparison study in the UK found that margins next to water bodies managed with restrictions on fertilizer and pesticide use (as well as restrictions on mowing and grazing) had a similar species richness of moths to conventionally managed margins. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, paired, site comparison study in the UK found that margins next to water bodies managed with restrictions on fertilizer and pesticide use (as well as restrictions on mowing and grazing) had a greater abundance of moths than conventionally managed margins. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3894https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3894Tue, 09 Aug 2022 13:15:49 +0100Collected Evidence: Collected Evidence: Use genetically modified crops which produce pesticide to replace conventional pesticide application          One study evaluated the effects on butterflies and moths of using genetically modified crops which produce pesticide to replace conventional pesticide application. This study was in a laboratory. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Survival (1 study): One controlled study in a laboratory found that pollen from genetically modified maize expressing the Bacillus thuringiensis kurstaki (Btk) toxin against European corn borer did not reduce the survival of eastern tiger swallowtail or spicebush swallowtail caterpillars more than pollen from non-genetically modified maize. Condition (1 study): One controlled study in a laboratory found that pollen from genetically modified maize expressing the Bacillus thuringiensis kurstaki (Btk) toxin against European corn borer did not reduce the growth of eastern tiger swallowtail or spicebush swallowtail caterpillars more than pollen from non-genetically modified maize. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3895https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3895Tue, 09 Aug 2022 13:21:11 +0100Collected Evidence: Collected Evidence: Stop using pesticides as seed dressings and sprays in flower beds and greenspace One study evaluated the effects on butterflies and moths of stopping the use of pesticides as seed dressings and sprays in flower beds and greenspaces. The study was in France. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in France found that gardens where insecticides and herbicides were not used had a higher abundance of butterflies, but gardens where fungicides and snail pellets were not used had a lower abundance of butterflies BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3900https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3900Tue, 09 Aug 2022 15:03:07 +0100Collected Evidence: Collected Evidence: Use low intensity lighting One study evaluated the effects on butterflies and moths of using low intensity lighting. This study was in Germany. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (1 STUDY) Behaviour change (1 study): One replicated, paired, controlled study in Germany found that fewer moths were attracted to low intensity lights (which also emitted a narrower range of yellow light with little UV) than to higher intensity lights (which also emitted broader spectra and included UV). Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3902https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3902Tue, 09 Aug 2022 15:09:27 +0100Collected Evidence: Collected Evidence: Use shielded “full cut-off” lights to remove outwards lighting One study evaluated the effects on butterflies and moths of using shielded “full cut-off” lights to remove outwards lighting. This study was in Slovenia. COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (1 STUDY) Behaviour change (1 study): One replicated, paired, controlled study in Slovenia found that fewer individual moths and moth species were attracted to lights fitted with blinds to prevent light scattering (along with filters to remove shorter wavelengths) than to conventional lights without blinds or filters. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3904https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3904Tue, 09 Aug 2022 15:14:48 +0100Collected Evidence: Collected Evidence: Manage perennial bioenergy crops to benefit butterflies and moths One study evaluated the effects on butterflies and moths of managing perennial bioenergy crops to benefit butterflies and moths. This study was in the USA. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, controlled study in the USA found that plots planted with a diverse mix of bioenergy crops had a greater species richness of butterflies than plots planted with fewer species. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, controlled study in the USA found that plots planted with a diverse mix of bioenergy crops had a higher abundance of butterflies than plots planted with fewer species. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3918https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3918Thu, 11 Aug 2022 11:12:26 +0100Collected Evidence: Collected Evidence: Grow native trees within perennial crop plantations One study evaluated the effects on butterflies and moths of growing native trees within perennial crop plantations. This study was in Costa Rica. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, site comparison study in Costa Rica found that coffee farms with a native and a non-native tree species growing within them had a higher diversity of butterflies than coffee farms with a single non-native tree species, but a similar diversity to coffee farms with two non-native tree species. The same study found a similar species richness of butterflies on all farms. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Costa Rica found that coffee farms with a native and a non-native tree species growing within them had a similar abundance of butterflies to coffee farms with one or two non-native tree species. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3920https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3920Thu, 11 Aug 2022 11:25:19 +0100Collected Evidence: Collected Evidence: Leave unharvested crop headlands within arable fields One study evaluated the effects of leaving unharvested crop headlands within arable fields. This study was in France. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, paired, site comparison study in France found that unharvested alfalfa headlands had a greater species richness of butterflies than harvested alfalfa or wheat fields. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, paired, site comparison study in France found that unharvested alfalfa headlands had a higher abundance of butterflies than harvested alfalfa or wheat fields. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3924https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3924Thu, 11 Aug 2022 17:02:01 +0100Collected Evidence: Collected Evidence: Manage rice field banks to benefit butterflies and moths One study evaluated the effects on butterflies and moths of managing rice field banks to benefit butterflies and moths. This study was in Italy. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, site comparison study in Italy found that unmown, herbicide-free rice field banks had a greater species richness of butterflies than banks which were mown or sprayed with herbicide. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Italy found that unmown, herbicide-free rice field banks had a higher abundance of butterflies, including large copper, than banks which were mown or sprayed with herbicide. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3928https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3928Thu, 11 Aug 2022 17:33:27 +0100Collected Evidence: Collected Evidence: Replace non-native species of tree/shrub with native species One study evaluated the effects on butterflies and moths of replacing non-native species of tree/shrub with native species. This study was in Panama. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, site comparison study in Panama found that established plantations of native trees had a similar species richness of butterflies to plantations of exotic trees, but a greater species richness than old growth forest. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Panama found that established plantations of native trees had a similar abundance of butterflies to plantations of exotic trees, but a higher abundance than old growth forest. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3937https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3937Sat, 13 Aug 2022 14:55:09 +0100Collected Evidence: Collected Evidence: Create young plantations within mature woodland One study evaluated the effects on butterflies and moths of creating young plantations within mature woodland. This study was in the UK. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in the UK found that pearl-bordered fritillary and small pearl-bordered fritillary populations were more likely to persist for up to 20 years in woodlands with larger areas of young plantations (or coppicing) than in mature coniferous (both species) or deciduous (pearl-bordered fritillary only) woodland. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3941https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3941Sat, 13 Aug 2022 14:57:33 +0100Collected Evidence: Collected Evidence: Remove tree canopy to reduce pond or waterway shading One study evaluated the effects on butterflies and moths of removing tree canopy to reduce pond or waterway shading. This study was in the USA. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (1 STUDY) Survival (1 study): One replicated, randomized, paired, controlled study in the USA1 found that removing trees to reduce stream shading reduced the survival of Appalachian brown caterpillars and pupae, but did not affect egg survival. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3952https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3952Sat, 13 Aug 2022 15:22:29 +0100Collected Evidence: Collected Evidence: Reintroduce mammals as ecosystem engineers One study evaluated the effects on butterflies and moths of reintroducing mammals as ecosystem engineers. This study was in Italy. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, site comparison study in Italy found that olive groves with wild boar present had a lower species richness of butterflies than groves without wild boar. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Italy found that olive groves with wild boar present had a lower total abundance of butterflies, and a lower abundance of six individual species, but a higher abundance of two species, than groves without wild boar. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3953https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3953Sat, 13 Aug 2022 15:22:41 +0100Collected Evidence: Collected Evidence: Install artificial dams in streams to raise water levels One study evaluated the effects on butterflies and moths of installing artificial dams in streams to raise water levels. This study was in the USA. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (1 STUDY) Survival (1 study): One replicated, randomized, paired, controlled study in the USA found that installing artificial dams in streams did not increase the survival of Appalachian brown butterfly eggs, caterpillars or pupae. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3954https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3954Sat, 13 Aug 2022 15:22:51 +0100Collected Evidence: Collected Evidence: Mark the location of webs or caterpillars before mowing One study evaluated the effects on butterflies and moths of marking the location of webs or caterpillars before mowing. This study was in Poland. COMMUNITY RESPONSE (0 STUDIES)   POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, before-and-after study in Poland reported that after marsh fritillary caterpillar webs were marked before mowing, the number of webs increased the following year. BEHAVIOUR (0 STUDIES)  Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3970https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3970Sun, 14 Aug 2022 10:39:27 +0100Collected Evidence: Collected Evidence: Protect in-field trees One study evaluated the effects of protecting in-field trees on butterflies and moths. The study was in Sweden. COMMUNITY RESPONSE (1 STUDY) Richness/diversity (1 study): One replicated, site comparison study in Sweden found that where more trees and trees of more species had been retained in pastures, butterfly species richness was higher, but richness was lower when a high proportion of those trees were large. POPULATION RESPONSE (0 STUDIES) BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3978https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3978Thu, 18 Aug 2022 10:40:32 +0100Collected Evidence: Collected Evidence: Plant more than one crop per field (intercropping) One study evaluated the effects on butterflies and moths of planting more than one crop per field. The study was in Malaysia. COMMUNITY RESPONSE (1 STUDY) Community composition (1 study): One replicated, site comparison study in Malaysia found that smallholdings planted with oil palm and other crops did not differ in butterfly community composition from those planted with oil palm alone. Richness/diversity (1 study): One replicated, site comparison study in Malaysia found that smallholdings planted with oil palm and other crops did not have greater butterfly species richness than those planted with oil palm alone. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Malaysia found that smallholdings planted with oil palm and other crops did not have higher overall butterfly abundance than those planted with oil palm alone. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3983https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3983Sat, 20 Aug 2022 19:18:11 +0100
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What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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