Collected Evidence: Collected Evidence: Maintain traditional orchards to benefit butterflies and moths Two studies evaluated the effects of maintaining traditional orchards on butterflies and moths. One study was in each of the USA and Germany. COMMUNITY RESPONSE (2 STUDIES) Community composition (1 study): One replicated, site comparison study in Germany found that managed orchards had a similar community composition of butterflies and burnet moths to abandoned orchards. Richness/diversity (2 studies): One replicated, site comparison study in Germany found that managed orchards had a similar species richness of butterflies and burnet moths to abandoned orchards. One controlled study in the USA found that an unmanaged and a partially managed orchard had a greater species richness and diversity of leaf-eating arthropods (including caterpillars) than a commercially managed orchard. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, site comparison study in Germany found that managed orchards had a lower abundance of butterflies and burnet moths than abandoned orchards. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3917https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3917Thu, 11 Aug 2022 11:04:20 +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%2Fconservationevidencejournal.com%2Factions%2F3918https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3918Thu, 11 Aug 2022 11:12:26 +0100Collected Evidence: Collected Evidence: Manage vineyards to benefit butterflies and moths Two studies evaluated the effects on butterflies and moths of managing vineyards to benefit butterflies and moths. One study was in each of the USA and Spain. COMMUNITY RESPONSE (2 STUDIES) Richness/diversity (2 studies): One of two replicated, site comparison studies (including one paired study) in the USA and Spain found that grass strips between vine rows had a greater species richness of butterflies than the vine rows themselves, and vineyards managed with fewer chemicals had a greater species richness of butterflies than conventionally managed vineyards. The other study found that vineyards managed to encourage native plants, and where insecticide was rarely used, had a similar species richness of butterflies to conventionally managed vineyards. POPULATION RESPONSE (1 STUDY) Abundance (1 study): One replicated, paired, site comparison study in the USA found that vineyards managed to encourage native plants, and where insecticide was rarely used, had a greater abundance of butterflies than conventionally managed vineyards. BEHAVIOUR (0 STUDIES)Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3919https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3919Thu, 11 Aug 2022 11:19:09 +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%2Fconservationevidencejournal.com%2Factions%2F3920https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3920Thu, 11 Aug 2022 11:25:19 +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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