Collected Evidence: Collected Evidence: Add surface mulch: brackish/salt marshes One study evaluated the effects, on vegetation, of using organic mulch to restore or create brackish/salt marshes. The study was in Australia. VEGETATION COMMUNITY Overall richness/diversity (1 study): One replicated, paired, controlled study on a sandflat in Australia found that mulched and unmulched plots had similar plant species richness over two years. VEGETATION ABUNDANCE Herb abundance (1 study): One replicated, paired, controlled study on a sandflat in Australia found that mulched plots were more likely to contain glasswort Sarcocornia quinqueflora than unmulched plots, after 20 months. However, mulching had no significant effect on glasswort biomass after 20 months, and typically had no significant effect on glasswort cover over two years. VEGETATION STRUCTURECollected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3248https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3248Sat, 10 Apr 2021 12:51:36 +0100Collected Evidence: Collected Evidence: Add surface mulch: freshwater swampsWe found no studies that evaluated the effects, on vegetation, of using organic mulch to restore or create freshwater swamps.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3249https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3249Sat, 10 Apr 2021 12:51:52 +0100Collected Evidence: Collected Evidence: Add surface mulch: brackish/saline swampsWe found no studies that evaluated the effects, on vegetation, of using organic mulch to restore or create brackish/saline swamps.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3250https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3250Sat, 10 Apr 2021 12:52:03 +0100Collected Evidence: Collected Evidence: Add cover other than mulchWe found no studies that evaluated the effects, on vegetation, of using cover other than mulch to restore/create marshes or swamps.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3251https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3251Sat, 10 Apr 2021 13:03:16 +0100Collected Evidence: Collected Evidence: Introduce nurse plants: freshwater marshesWe found no studies that evaluated the effects, on naturally colonizing vegetation, of introducing nurse plants to restore or create freshwater marshes.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3252https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3252Sat, 10 Apr 2021 13:03:49 +0100Collected Evidence: Collected Evidence: Introduce nurse plants: brackish/salt marshesWe found no studies that evaluated the effects, on naturally colonizing vegetation, of introducing nurse plants to restore or create brackish/salt marshes.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3253https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3253Sat, 10 Apr 2021 13:04:09 +0100Collected Evidence: Collected Evidence: Introduce nurse plants: freshwater swampsWe found no studies that evaluated the effects, on naturally colonizing vegetation, of introducing nurse plants to restore or create freshwater swamps.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated 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%2F3254https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3254Sat, 10 Apr 2021 13:04:24 +0100Collected Evidence: Collected Evidence: Introduce nurse plants: brackish/saline swamps One study evaluated the effects, on naturally colonizing vegetation, of introducing nurse plants to restore or create brackish/saline swamps. The study was in India. VEGETATION COMMUNITY   VEGETATION ABUNDANCE   VEGETATION STRUCTURE Height (1 study): One study on an estuarine mudflat in India reported that the average height of mangrove propagules trapped by nurse grasses increased by 21–90% (depending on the species) over the first month after establishment. OTHER Germination/emergence (1 study): One study on an estuarine mudflat in India reported that 60–80% (depending on the species) of mangrove propagules trapped by nurse grasses developed into seedlings. Saltmarsh grasses trapped 1,200–1,372 mangrove propagules/m2/week, approximately 1–2 years after they were planted. Collected Evidencehttps%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3255https%3A%2F%2Fwww.conservationevidence.com%2Factions%2F3255Sat, 10 Apr 2021 13:04:30 +0100
What Works 2021 cover

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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