What Works in Conservation 2021
| , , ,1. Amphibian conservation
1.9 Threat: Pollution
Texte intégral
1.9.1 Agricultural pollution
Unknown effectiveness (limited evidence)
Create walls or barriers to exclude pollutants
1One controlled study in Mexico found that installing filters across canals to improve water quality and exclude fish increased weight gain in axolotls. Assessment: unknown eflectiveness — limited evidence (eflectiveness 35 %; certainty 29 %; harms 0 %).
http://www.conservationevidence.com/actions/771
Plant riparian buffer strips
2One replicated, controlled study in the USA found that planting buffer strips along streams did not increase amphibian abundance or numbers of species. Assessment: unknown eflectiveness — limited evidence (eflectiveness 0 %; certainty 30 %; harms 0 %).
http://www.conservationevidence.com/actions/819
Reduce pesticide, herbicide or fertilizer use
3One study in Taiwan found that halting pesticide use, along with habitat management, increased a population of frogs. Assessment: unknown eflectiveness — limited evidence (eflectiveness 71 %; certainty 26 %; harms 0 %).
http://www.conservationevidence.com/actions/832
No evidence found (no assessment)
4We have captured no evidence for the following intervention:
5• Prevent pollution from agricultural lands or sewage treatment facilities entering watercourses
1.9.2 Industrial pollution
Trade-off between benefit and harms
Add limestone to water bodies to reduce acidification
6Five before-and-after studies, including one controlled, replicated study, in the Netherlands and UK found that adding limestone to ponds resulted in establishment of one of three translocated amphibian populations, a temporary increase in breeding and metamorphosis by natterjack toads and increased egg and larval survival of frogs. One replicated, site comparison study in the UK found that habitat management that included adding limestone to ponds increased natterjack toad populations. However, two before-and-after studies, including one controlled study, in the UK found that adding limestone to ponds resulted in increased numbers of abnormal eggs, high tadpole mortality and pond abandonment. Assessment: trade-ofls between benefits and harms (eflectiveness 47 %; certainty 50 %; harms 50 %).
http://www.conservationevidence.com/actions/748
No evidence found (no assessment)
7We have captured no evidence for the following intervention:
8• Augment ponds with ground water to reduce acidification.
Table des illustrations
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