Collected Evidence: Collected Evidence: Modify crop farming practices in watershed to reduce pollution: freshwater marshes One study evaluated the effects, on vegetation in freshwater marshes, of modifying crop farming practices in the watershed to reduce pollution. The study was in the USA. VEGETATION COMMUNITY Community composition (1 study): One replicated, site comparison study in the USA reported that freshwater marshes being restored by abandoning cropland in the watershed (along with removing topsoil from the marshes) contained a different overall plant community, after 1–12 years, to both natural and degraded marshes nearby. Overall richness/diversity (1 study): The same study reported that freshwater marshes being restored by abandoning cropland in the watershed (along with removing topsoil from the marshes) contained fewer wetland plant species, after 1–12 years, than nearby natural marshes. VEGETATION ABUNDANCE   VEGETATION STRUCTURECollected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3166https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3166Tue, 06 Apr 2021 13:17:51 +0100Collected Evidence: Collected Evidence: Modify crop farming practices in watershed to reduce pollution: brackish/salt marshesWe found no studies that evaluated the effects, on vegetation in brackish/salt marshes, of modifying crop farming practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3167https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3167Tue, 06 Apr 2021 13:18:03 +0100Collected Evidence: Collected Evidence: Modify crop farming practices in watershed to reduce pollution: freshwater swampsWe found no studies that evaluated the effects, on vegetation in freshwater swamps, of modifying crop farming practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3168https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3168Tue, 06 Apr 2021 13:18:13 +0100Collected Evidence: Collected Evidence: Modify crop farming practices in watershed to reduce pollution: brackish/saline swampsWe found no studies that evaluated the effects, vegetation in brackish/saline swamps, of modifying crop farming practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3169https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3169Tue, 06 Apr 2021 13:18:27 +0100Collected Evidence: Collected Evidence: Modify logging practices in watershed to reduce pollutionWe found no studies that evaluated the effects, on vegetation in marshes or swamps, of modifying logging practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3170https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3170Tue, 06 Apr 2021 13:35:53 +0100Collected Evidence: Collected Evidence: Modify livestock farming practices in watershed to reduce pollutionWe found no studies that evaluated the effects, on vegetation in marshes or swamps, of modifying livestock farming practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3171https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3171Tue, 06 Apr 2021 13:38:04 +0100Collected Evidence: Collected Evidence: Modify aquaculture practices in watershed to reduce pollutionWe found no studies that evaluated the effects, on vegetation in marshes or swamps, of modifying aquacultural practices in the watershed to reduce pollution.   ‘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%2Fconservationevidencejournal.com%2Factions%2F3172https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F3172Tue, 06 Apr 2021 13:39:18 +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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