Conservation Evidence: Evidence Data

Collected Evidence: Collected Evidence: Sow seeds of nurse plants One study examined the effects of sowing seeds of nurse plants on grassland vegetation. The study was in France. VEGETATION COMMUNITY (1 STUDY) Community composition (1 study): One replicated, controlled study in France found that sowing seeds of nurse plants reduced the similarity of the plant community to that of nearby intact steppe compared to areas where no seeds were sown. Overall richness/diversity (1 study): One replicated, controlled study in France found that sowing seeds of nurse plants did not change plant species richness and richness was lower than in nearby intact steppe. VEGETATION ABUNDANCE (1 STUDY) Overall abundance (1 study): One replicated, controlled study in France found that sowing seeds of nurse plants did not change vegetation cover compared to areas where no seeds were sown. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3401https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3401Fri, 25 Jun 2021 14:13:14 +0100Collected Evidence: Collected Evidence: Sow seeds of tree species in savanna One study examined the effects of sowing seeds of tree species in savanna on grassland vegetation. The study was in Brazil. VEGETATION COMMUNITY (0 STUDIES) VEGETATION ABUNDANCE (0 STUDIES) VEGETATION STRUCTURE (0 STUDIES) OTHER (1 STUDY) Germination/Emergence (1 study): One replicated study in Brazil found that sowing tree seeds in savanna resulted in germination of 52% of the tree seeds. Survival (1 study): One replicated study in Brazil found that after sowing tree seeds in savanna, 35% of the seeds produced seedlings that survived for more than two years. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3403https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3403Fri, 25 Jun 2021 14:32:10 +0100Collected Evidence: Collected Evidence: Sow seeds of parasitic species (e.g. yellow rattle) Six studies examined the effects of sowing seeds of parasitic species on grassland vegetation. Four studies were in the UK, one study was in Switzerland and one was in Belgium. VEGETATION COMMUNITY (6 STUDIES) Overall richness/diversity (6 studies): Five of six studies (including five controlled studies and one review) in the UK, Switzerland and Belgium found that sowing seeds of the parasitic plants yellow rattle, European yellow rattle or marsh lousewort increased plant species richness and/or diversity. The other study found that sowing yellow rattle seeds did not alter plant species richness. VEGETATION ABUNDANCE (3 STUDIES) Overall abundance (1 study): One review in the UK found that sowing seeds of the parasitic plant yellow rattle led to a decrease in total plant biomass in three of four studies. Characteristic plant abundance (1 study): One controlled study in Belgium found that sowing seeds of the parasitic plant marsh lousewort increased the abundance of six target plant species. Grass abundance (1 study): One replicated, controlled study in Switzerland found that sowing seeds of the parasitic plant European yellow rattle led to a decrease in grass cover. Forb abundance (1 study): One replicated, controlled study in Switzerland found that sowing seeds of the parasitic plant European yellow rattle did not alter the cover of forbs. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3404https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3404Fri, 25 Jun 2021 14:36:07 +0100Collected Evidence: Collected Evidence: Sow seeds at a higher density Six studies examined the effects of sowing seeds at a higher density on grassland vegetation. Four studies were in the USA, and one study was in each of the UK and Canada. VEGETATION COMMUNITY (2 STUDIES) Community composition (1 study): One replicated, randomized, controlled study in the UK found that sowing grass seeds at a higher density did not increase the similarity of the vegetation community to that of the target community. Forb richness/diversity (1 study): One replicated, randomized, paired, controlled study in the USA found that sowing seeds at a higher density increased forb species richness. VEGETATION ABUNDANCE (4 STUDIES) Sown/planted species abundance (1 study): One replicated, controlled study in the USA found that sowing seeds at a higher density did not alter the cover of sown plant species. Grass abundance (3 studies): One replicated, randomized, paired, controlled study in the USA found that sowing seeds at a higher density increased grass cover. Forb abundance (1 study): One replicated, randomized, paired, controlled study in the USA found that sowing seeds at a higher density increased forb cover. Tree/shrub abundance (1 study): One site comparison study in the USA found that sowing grass seeds at a higher density reduced the cover of native grassland shrubs. Individual plant species abundance (1 study): One replicated, controlled study in Canada found that sowing seeds at a higher density increased the cover of thickspike wheatgrass. VEGETATION STRUCTURE (0 STUDIES) OTHER (1 STUDY) Germination/Emergence (1 study): One replicated, randomized, paired, controlled study in the USA found that sowing seeds at a higher density increased the number of purple needlegrass seedlings. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3405https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3405Fri, 25 Jun 2021 14:49:43 +0100Collected Evidence: Collected Evidence: Sow seeds at start of growing season Three studies examined the effects of sowing seeds at the start of the growing season on grassland vegetation. Two studies were in the USA and one was in the UK. VEGETATION COMMUNITY (2 STUDIES) Overall richness/diversity (1 study): One replicated, randomized, controlled study in the USA found that sowing seeds in spring increased plant diversity compared to sowing in autumn. Sown/planted richness/diversity (1 study): One replicated, randomized, paired, controlled study in the UK found that sowing seeds in spring increased the number of sown species compared to sowing in autumn. VEGETATION ABUNDANCE (1 STUDY) Sown/planted species abundance (1 study): One replicated, randomized, paired, controlled study in the UK found that sowing seeds in spring increased the cover of sown grass and forb species compared to sowing in autumn. VEGETATION STRUCTURE (0 STUDIES) OTHER (1 STUDY) Germination/Emergence (1 study): One replicated, paired, controlled study in the USA found that sowing seeds in spring led to similar emergence of forb seedlings compared to sowing in winter. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3407https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3407Fri, 25 Jun 2021 15:03:30 +0100Collected Evidence: Collected Evidence: Sow seeds in part of site Three studies examined the effects of sowing seeds in part of a site on grassland vegetation. Two studies were in the USA and one was in the Czech Republic. VEGETATION COMMUNITY (2 STUDIES) Overall richness/diversity (1 study): One replicated study in the USA found that sowing seeds in part of a site resulted in an increase in plant species richness over time. Sown/planted species richness/diversity (1 study): One replicated, randomized, paired, controlled study in the Czech Republic found that sowing seeds in part of a site did not alter species richness for sown grass and herb species. VEGETATION ABUNDANCE (2 STUDY) Sown/planted species abundance (2 studies): One study in the USA found that after sowing seeds in part of a site, new patches of two of three sown plant species were recorded in unsown areas. One replicated, randomized, paired, controlled study in the Czech Republic found that sowing seeds in part of a site did not alter the cover of sown grass and herb species. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3408https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3408Fri, 25 Jun 2021 15:14:50 +0100Collected Evidence: Collected Evidence: Sow seeds in prepared gaps within vegetation One study examined the effects of sowing seeds in prepared gaps within vegetation on grasslands. The study was in Hungary. VEGETATION COMMUNITY (0 STUDIES) VEGETATION ABUNDANCE (1 STUDY) Sown/planted species abundance (1 study): One replicated study in Hungary found that sowing seeds in large gaps within vegetation led to a greater cover of sown target plant species than sowing in smaller gaps. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3409https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3409Fri, 25 Jun 2021 15:17:23 +0100Collected Evidence: Collected Evidence: Use slot/strip seeding Two studies examined the effects of using slot/strip seeding on grassland vegetation. Both studies were in the UK. VEGETATION COMMUNITY (1 STUDY) Grass richness/diversity (1 study): One replicated, randomized, paired, controlled study in the UK found that strip seeding increased grass species richness. Forb richness/diversity (1 study): One replicated, randomized, paired, controlled study in the UK found that strip seeding increased forb species richness. VEGETATION ABUNDANCE (1 STUDY) Sown/planted species abundance (1 study): One review in the UK found that in the majority of cases strip seeding resulted in failed introductions of sown species. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3411https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3411Fri, 25 Jun 2021 15:29:28 +0100Collected Evidence: Collected Evidence: Spray slurry of seed, mulch and water (‘hydroseeding’) Four studies examined the effects of spraying a slurry of seed, mulch and water (‘hydroseeding’) on grassland vegetation. Two studies were in Spain, one study was in the USA and one was in Italy. VEGETATION COMMUNITY (2 STUDIES) Overall richness/diversity (2 studies): One of two replicated, controlled studies (one of which was randomized and paired) in Spain and Italy found that hydroseeding with non-native seeds did not alter plant diversity in most cases. The other study found that hydroseeding increased plant species richness in one of two cases. VEGETATION ABUNDANCE (3 STUDIES) Overall abundance (2 studies): One of two controlled studies (one of which was replicated, randomized and paired) in Spain found that hydroseeding with non-native seeds increased overall plant cover in most cases. The other study found that hydroseeding did not alter vegetation cover. Sown/planted species abundance (1 study): One replicated, randomized, paired, controlled study in the USA found that hydroseeding increased the abundance of half of the sown plant species compared to drill seeding. VEGETATION STRUCTURE (1 STUDY) Height (1 study): One replicated, controlled study in Italy found that hydroseeding led to an increase in the height of herb species. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3412https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3412Fri, 25 Jun 2021 15:42:50 +0100Collected Evidence: Collected Evidence: Transfer plant material from intact grassland alongside seeding/planting Four studies examined the effects of transferring plant material from intact grassland alongside seeding/planting on grassland vegetation. Three studies were in Germany and one was in Hungary. VEGETATION COMMUNITY (3 STUDIES) Characteristic plant richness/diversity (3 studies): Two of three replicated, controlled studies (including two randomized studies, one of which was paired) in Germany and Hungary found that transferring hay alongside sowing seeds did not alter target grass and forb species richness. The other study found that transferring hay alongside sowing seeds increased the species richness of target plants. VEGETATION ABUNDANCE (3 STUDIES) Characteristic plant abundance (3 studies): Two of three replicated, controlled studies (including two randomized studies, one of which was paired) in Germany and Hungary found that transferring hay alongside sowing seeds did not alter the cover of target grass and forb species. The other study found that transferring hay alongside sowing seeds increased the cover of target plant species. VEGETATION STRUCTURE (0 STUDIES) OTHER (1 STUDY) Germination/Emergence (1 study): One replicated, randomized, paired, controlled study in Germany found that transferring plant material alongside sowing seeds did not alter seedling emergence when small amounts of plant material were added, but seedling emergence was reduced when large amounts of plant material were added. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3426https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3426Mon, 28 Jun 2021 10:14:07 +0100Collected Evidence: Collected Evidence: Use erosion blanket after seeding/planting Three studies examined the effects of using erosion blankets after seeding/planting on grassland vegetation. Two studies were in the USA and one study was in Spain. VEGETATION COMMUNITY (1 STUDY) Overall richness/diversity (1 study): One replicated, randomized, controlled study in Spain found that using an organic blanket after sowing seeds increased plant species richness. VEGETATION ABUNDANCE (3 STUDIES) Overall abundance (3 studies): Two of three replicated, controlled studies (two of which were paired and two randomized) in the USA and Spain found that using an erosion blanket after seeding and planting did not alter vegetation cover. The other study found that using an organic blanket after sowing seeds increased plant density. VEGETATION STRUCTURE (0 STUDIES)Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3431https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3431Mon, 28 Jun 2021 13:37:39 +0100